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Controlling fuel quantity

Subclass of:

701 - Data processing: vehicles, navigation, and relative location

701001000 - VEHICLE CONTROL, GUIDANCE, OPERATION, OR INDICATION

701099000 - With indicator or control of power plant (e.g., performance)

701101000 - Internal-combustion engine

701102000 - Digital or programmed data processor

701103000 - Control of air/fuel ratio or fuel injection

Patent class list (only not empty are listed)

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Entries
DocumentTitleDate
20130030671FUEL CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A fuel control apparatus (01-31-2013
20080306676Internal combustion engine with variable compression ratio - In a variable compression ratio internal combustion engine in which the compression ratio is changed by changing the combustion chamber volume, the present invention enables to inhibit irregularities in the air-fuel ratio involved by changing of the combustion chamber volume. In a transition period during which the compression ratio is changed, the actual volume of the combustion chamber realized by a compression ratio changing mechanism is detected. A factor that influences the air-fuel ratio (for example, fuel injection quantity, cylinder intake air quantity or amount of EGR) is controlled based on the actual volume of the combustion chamber thus detected to make the air-fuel ratio substantially equal to that before and after the change of the compression ratio.12-11-2008
20090143958Common rail fuel control system - A method of controlling a common rail fuel system for an engine is disclosed. The method includes delivering fuel to a fuel injector fluidly coupled to a common rail. The common rail is fluidly coupled to a fuel tank through a pump. The method also includes sending a signal to the fuel injector to deliver a first quantity of fuel to the engine. The first quantity being indicative of a desired power from the engine. The method further includes detecting a fuel transfer pressure upstream of the pump, and derating the engine as a function of the detected fuel transfer pressure. The derating includes decreasing the first quantity of fuel.06-04-2009
20110202261Engine RPM Control Device - Provided is an engine rpm control device which gradually reduces the output speed of an engine drive object when reducing the engine rpm. The engine rpm control device (08-18-2011
20110202260SPARK PLUG DEGRADATION DETECTION - Methods and systems are provided for identifying and indicating degradation of an engine cylinder spark plug. In response to a cylinder misfire event during selected engine operating conditions, followed by an occurrence of a threshold number and/or rate of pre-ignition events in the same cylinder, a controller may determine that the spark plug is degraded. The controller may limit combustion in the cylinder in response to the degradation. Additionally, cylinder pre-ignition mitigating steps may be taken.08-18-2011
20110202259AIR/FUEL RATIO CONTROL APPARATUS FOR GENERAL-PURPOSE ENGINE - In an apparatus for controlling an air/fuel ratio of a general-purpose internal combustion engine using mixed fuel containing alcohol and gasoline and operated at a desired engine speed inputted by the operator while a throttle opening is regulated such that a detected engine speed converges to the inputted desired engine speed, a fuel injection amount determined for mixed fuel based on fuel injection amount characteristics is increased/decreased when a load is kept constant and the output air/fuel ratio is estimated to correct the fuel injection amount by the estimated air/fuel ratio, while a switch (knob) is installed to be manipulated by the operator to switch the fuel injection amount characteristics.08-18-2011
20110202258AIR/FUEL RATIO CONTROL APPARATUS FOR GENERAL-PURPOSE ENGINE - In an apparatus for controlling an air/fuel ratio of a general-purpose internal combustion engine using mixed fuel containing alcohol and gasoline and operated at a desired engine speed inputted by the operator while a throttle opening is regulated such that a detected engine speed converges to the inputted desired engine speed, a fuel injection amount prepared for mixed fuel is increased/decreased when a load is kept constant and the output air/fuel ratio (at which an output of the engine becomes maximum) is estimated. A rate of alcohol contained in the fuel is estimated from the estimated air/fuel ratio and the fuel injection amount is corrected based on the estimated alcohol rate, thereby determining the fuel injection amount appropriately in accordance with the estimated alcohol rate.08-18-2011
20110202257AIR/FUEL RATIO CONTROL APPARATUS FOR GENERAL-PURPOSE ENGINE - In an apparatus for controlling an air/fuel ratio of a general-purpose internal combustion engine using mixed fuel containing alcohol and gasoline and operated at a desired engine speed inputted by the operator while a throttle opening is regulated such that a detected engine speed converges to the inputted desired engine speed, a fuel injection amount for mixed fuel determined based on fuel injection amount characteristics is increased/decreased when a load is kept constant and the output air/fuel ratio (at which an output of the engine becomes maximum) is estimated. And the fuel injection amount is corrected based on the estimated air/fuel ratio, thereby enabling to estimate the output air/fuel ratio without using an expensive air/fuel ratio sensor and to feedback-control the fuel injection amount such that the engine is operated at the output air/fuel ratio.08-18-2011
20110202256DISTRIBUTED FUEL DELIVERY SYTEMS FOR ALTERNATIVE GASEOUS FUEL APPLICATIONS - A control system includes an engine control module that generates fuel injector command signals for fuel injectors of an engine and engine parameter signals that indicate operating characteristics of the engine. A fuel injector control module communicates with the engine control module via a network. The engine control module transmits the engine parameter signals to the fuel injector control module via the network. The fuel injector control module generates compensated fuel injector signals based on the fuel injector command signals and the engine parameter signals. The engine control module may generate fuel injector command signals for a gaseous fuel mode based on signals received from the fuel injector control module.08-18-2011
20100076668CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention relates to a control apparatus for an internal combustion engine. An object of the present invention is to suppress deterioration of emission and fuel consumption arising during acceleration due to an effect of an exhaust valve opening timing.03-25-2010
20130080033CONTROL DEVICE AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - A control device for an internal combustion engine performs rich control when a fuel cutoff operation is terminated and fuel supply to a combustion chamber is restarted, and the engine includes a plurality of the combustion chambers and a fuel supply cycle is repeated. The control device includes a controller configured to set a first moment and a second moment such that the fuel supply cycle which includes the first moment is different from the fuel supply cycle which includes the second moment, the first moment being a moment at which the rich control is started in a first combustion chamber of the plurality of combustion chambers, and the second moment being a moment at which the rich control is started in a second combustion chamber of the plurality of combustion chambers that is different from the first combustion chamber.03-28-2013
20080270008Method and System for Adjusting Fuel Injector Signals for Alternative Fuel Type - An engine control unit is configured to provide a fuel injector pulse width signal in response to oxygen sensor output. A signal modifier is in communication with the engine control unit to generate a modified oxygen sensor output. A second fuel injector pulse width is provided in response to that modified oxygen sensor output. The second fuel injector pulse width is 25% the first. The second pulse width signal is optimized for a gasoline blend and, more particularly, to an E85 fuel blend.10-30-2008
20090063020Fuel injection system with injection characteristic learning function - A fuel injection system designed to determine a correction value for correcting the quantity of fuel sprayed from a fuel injector into an internal combustion engine. The fuel injection system instructs the fuel injector to inject the fuel into the engine a plurality of times cyclically to learn an injection characteristic unique to the fuel injector and changes an injection duration for which the fuel is to be sprayed in each of injection events to disperse the injection durations evenly around a target injection quantity, thereby enabling the correction value to be determined in a decreased number of injections of fuel for a decreased amount of time.03-05-2009
20100100304ELECTRONIC CONTROL UNIT FOR CONTROLLING FUEL INJECTION IN EXPANSION AND/OR EXHAUST STROKES - An ECU controls to inject a small amount of fuel in an expansion/exhaust stroke under constraint of the minimum fuel injection capability of an injector at the time of warming-up of a catalyst. The ECU controls injection of fuel in expansion/exhaust strokes (expansion/exhaust stroke injection) at the time of warming-up of a catalyst. Fuel injection control is performed so that when temperature of the catalyst becomes higher than a predetermined temperature, fuel injection in the expansion/exhaust strokes is performed for a period of a predetermined ratio in a selected cycle period. The expansion/exhaust stroke injection is not performed in the other period. By effectively utilizing oxygen absorbed on the catalyst, while suppressing slip HC, the activation time of the catalyst can be shortened.04-22-2010
20100042308FUEL INJECTION AMOUNT CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - A fuel injection amount control apparatus controlling an amount of fuel supplied to an internal combustion engine is disclosed. An intake passage extends from the engine, and the intake passage is branched into a plurality of branch passages in an upstream section. The apparatus includes a plurality of intake air temperature sensors and an ECU. Each of the intake air temperature sensors is provided in one of the intake passages and detects an intake air temperature in the corresponding intake passage. The ECU selects an intake air temperature that most directly expresses the engine state or the environment from the intake air temperatures detected by the intake air temperature sensors. The ECU controls the amount of the fuel supplied to the engine by using the selected intake air temperature.02-18-2010
20120185156 APPARATUS FOR DETERMINING AN AIR-FUEL RATIO IMBALANCE AMONG CYLINDERS OF AN INTERNAL COMBUSTION ENGINE - An apparatus for determining an air-fuel ratio imbalance among cylinders based on an output value of an air-fuel ratio sensor, an imbalance determination parameter which becomes larger or smaller as a difference among air-fuel ratios becomes larger, and performs determining an air-fuel ratio imbalance among cylinders based on a result of a comparison between the imbalance determination parameter and a imbalance determination threshold. The determining apparatus calculates a purge correction coefficient which compensates for a change in the air-fuel ratio due to an evaporated fuel gas which is generated in a fuel tank, while the evaporated fuel gas is being introduced into an intake passage, and corrects a fuel injection amount with the purge correction coefficient FPG.07-19-2012
20120185155INJECTION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - A fuel injection control device (ECU) for controlling injection supply of fuel to an engine is applied to an injector that has a valve body formed with a fuel injection hole, a needle accommodated in the valve body for opening and closing the injection hole, and a piezoelectric element for driving the needle such that the needle reciprocates and that can continuously adjust an injection rate in accordance with an injection command signal to the piezoelectric element. The fuel injection control device senses a fuel pressure waveform indicating a transition of fuel pressure fluctuation accompanying a predetermined injection of the injector based on an output of a fuel pressure sensor and calculates an injection command signal for approximating a predetermined injection parameter concerning the predetermined injection to a reference value of the parameter based on the sensed fuel pressure waveform.07-19-2012
20120185154Method for Damage Diagnosis in a Handheld Work Apparatus - A handheld work apparatus has a combustion engine with an ignition unit, a unit for supplying fuel and a device to determine the rotational speed (n). The ignition unit includes a spark plug, a coil and a pole group. The pole group and the coil are moved in dependence on the rotational movement of a crankshaft of the combustion engine, whereby a ignition voltage is induced in the coil. The work apparatus has an open loop control which controls the ignition time (ZZP). A diagnostic unit for damage diagnosis is detachably connected to the work apparatus. For damage diagnosis, the diagnostic unit captures the course of the induced ignition voltage over at least one engine cycle when the combustion engine is running and damage is determined on the basis of the course of the captured voltage.07-19-2012
20090125214AIR-FUEL RATIO CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - A dead time in the case where an output of an air-fuel ratio sensor changes in a lean direction and a dead time in the case where the output changes in a rich direction are sensed respectively. The number of elements constituting data of past feedback correction amounts used for calculating a present feedback correction amount is changed in accordance with the larger one of the dead times. A lean direction response time and a rich direction response time are sensed respectively. A control gain is corrected in accordance with the lean direction response time when the output of the air-fuel ratio sensor changes in the lean direction. The control gain is corrected in accordance with the rich direction response time when the output changes in the rich direction.05-14-2009
20100030453Cetane Number Detection Means and Engine Having the Cetane Number Detection Means - A cetane number detection means in which an angular velocity detection means (02-04-2010
20100070157METHOD AND DEVICES TO REDUCE THE DIFFERENCE BETWEEN NORMALIZED AIR-FUEL RATIO OF THE VARIOUS CYLINDERS IN AN INTERNAL COMBUSTION ENGINE AND A PREDETERMINED VALUE - The invention relates to the field of methods and devices for reducing the difference between normalized air-fuel ratio of the various cylinders compared with a predetermined value between 0.7 and 1.1, of the normalized air-fuel ratio in an internal combustion engine. The method and devices utilize the signal of the ionization current produced by a suitable device, modifying the quantity of fuel on the basis of the signal determined by means of the method in question in the invention.03-18-2010
20130046455CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - A control device for an internal combustion engine which can highly precisely realize required torque including a high-frequency component with high responsiveness. The control device sets torque with a low frequency included in the required torque as an air quantity controlling torque, and calculates a target air quantity for realizing the air quantity controlling torque based on data in which a relationship of the air quantity and torque is set. The control device controls the air quantity in accordance with the target air quantity. Further, the control device sets torque including both a low frequency and a high frequency as air-fuel ratio controlling torque, and calculates an air-fuel ratio corresponding to the air-fuel ratio controlling torque and a present air quantity as a target air-fuel ratio. The control device controls a fuel injection amount in accordance with the target air-fuel ratio.02-21-2013
20130046454SYSTEM AND METHOD FOR ADJUSTING FUEL MASS FOR MINIMUM FUEL INJECTOR PULSE WIDTHS IN MULTIPLE FUEL SYSTEM ENGINES - A control system for an engine includes a fuel mass determination module, a mass fraction determination module, and a fuel injector control module. The fuel mass determination module determines a first minimum fuel mass corresponding to a first fuel system of the engine. The mass fraction determination module determines first minimum and maximum mass fractions based on the first minimum fuel mass and a total fuel mass. The fuel injector control module limits a first desired mass fraction based on the first minimum and maximum mass fractions, and controls a first fuel injector of the engine based on the limited first desired mass fraction.02-21-2013
20130046453SYSTEM AND METHOD FOR CONTROLLING MULTIPLE FUEL SYSTEMS - A system according to the principles of the present disclosure includes a fuel mass module and a fuel control module. The fuel mass module determines a first fuel mass before the first fuel mass is injected into one of a cylinder of an engine and an injection port of the cylinder. The fuel mass module also determines a second fuel mass after injection of the first fuel mass starts. The fuel control module controls a first fuel injector to inject the first fuel mass into the one of the cylinder and the injection port for a combustion event. The fuel control module also controls a second fuel injector to inject the second fuel mass into one of the cylinder and the injection port for the combustion event. The second fuel injector is different from the first fuel injector.02-21-2013
20130090836SYSTEM AND METHOD FOR THROTTLE POSITION SENSOR ELIMINATION - A control system for an engine having at least one manifold, a throttle, and a crank wheel includes a pressure sensor to measure a pressure in the at least one manifold and generate a pressure signal representing the pressure measured, a revolution sensor to measure a rate of rotation of the crank wheel of the engine and generate a rotation signal representing the rate of rotation measured, a processor in communication with each of the pressure sensor and the revolution sensor to receive the pressure signal and the rotation signal, analyze the pressure signal and the rotation signal based upon an instruction set to estimate a position of the throttle, and generate a control signal in response to the analysis of the pressure signal and the rotation signal; and an engine system to receive the control signal to control a function of the engine system.04-11-2013
20090326788FUEL INJECTION DEVICE - A fuel injection device 12-31-2009
20090306879CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - A control apparatus for an internal combustion engine is provided which, even when a starting time of an alcohol concentration change varies, can accurately detect a starting time of an alcohol concentration estimation, and set a concentration estimation time matched to the behavior of the concentration change after determination of the start of the concentration change. An air fuel ratio correction amount calculation unit calculates an air fuel ratio correction amount based on an air fuel ratio detected by a sensor. An estimation permission determination unit determines that a starting condition for concentration estimation holds, when the correction amount becomes out of a predetermined range, and sets a permission time for concentration estimation in accordance with an accumulated amount of fuel injected after the starting condition for concentration estimation holds. A concentration estimation unit calculates an estimated concentration value based on the correction amount during permission of the concentration estimation.12-10-2009
20090306878Method and device for controlling the fuel metering into at least one combustion chamber of an internal combustion engine - In a device and a method for controlling the fuel metering into at least one combustion chamber of an internal combustion engine, on the basis of at least one operating characteristic quantity, a control quantity is prespecified that determines the injected quantity of fuel. On the basis of a cylinder pressure quantity that characterizes the cylinder pressure and the at least one operating characteristic quantity, a correction value is prespecified for correcting the control quantity.12-10-2009
20090306877COMBUSTION CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE WITH RICH AND LEAN OPERATING CONDITIONS - A method of controlling combustion of an internal combustion engine that use fuel injection and that uses lean and rich modes of operation. Combustion control values, such as for fuel injection timing and quantity are determined by a torque representative value. This value is obtained from estimated in-cylinder conditions and from engine speed.12-10-2009
20120191325INJECTION FUEL AND LOAD BALANCING CONTROL SYSTEM - A method for correcting main fuel injection quantities in an internal combustion engine in a plurality of cylinders of the engine includes monitoring a desired fuel injection quantity for the plurality of cylinders, monitoring an in-cylinder pressure for each of the cylinders, determining a burnt fuel mass resulting from a main fuel injection for each of the cylinders based upon the in-cylinder pressures, determining a fuel injection quantity correction for each of the cylinders based upon the burnt fuel masses, and controlling fuel injections into the plurality of cylinders based upon the desired fuel injection quantity and the fuel injection quantity correction for each of the cylinders.07-26-2012
20120191324METHOD FOR IMPROVING TRANSIENT ENGINE OPERATION - A method for operating an engine with a fuel reformer is presented. In one embodiment a method for operating an engine by injecting a gaseous fuel and a liquid fuel to at least an engine cylinder is presented. The mixture of an engine cylinder may be diluted with EGR and a fraction of gaseous fuel may be increased relative to a fraction of liquid fuel injected to a cylinder in response to an operator tip-out.07-26-2012
20120191323INJECTOR EMULATION DEVICE - An injector emulation device for incorporation into a multiple fuel engine control system including a first control device (07-26-2012
20130073187METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine, having an exhaust gas turbocharger, during a load change of the internal combustion engine, includes initiation of a closing process of a throttle valve of the internal combustion engine, disposed in an induction tract or intake section of the internal combustion engine, as a function of an air pressure which is present upstream of the throttle valve, in such a way that the air pressure always falls short of a surge limit or pumping limit of a compressor, disposed in the induction tract, of the exhaust gas turbocharger. A staged or stepped reduction in a torque of the internal combustion engine is performed by shutting off fuel injections at predetermined cylinders of the internal combustion engine. An internal combustion engine with an exhaust gas turbocharger is also provided.03-21-2013
20130073186DIESEL ENGINE FOR AUTOMOBILE, CONTROL DEVICE AND CONTROL METHOD - A geometric compression ratio in an engine main body 03-21-2013
20130073185PREDICTIVE MODELING AND REDUCING CYCLIC VARIABILITY IN AUTOIGNITION ENGINES - Methods and systems are provided for controlling a vehicle engine to reduce cycle-to-cycle combustion variation. A predictive model is applied to predict cycle-to-cycle combustion behaviour of an engine based on observed engine performance variables. Conditions are identified, based on the predicted cycle-to-cycle combustion behaviour, that indicate high cycle-to-cycle combustion variation. Corrective measures are then applied to prevent the predicted high cycle-to-cycle combustion variation.03-21-2013
20130073184INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An inter-cylinder air-fuel ratio imbalance determining apparatus for an internal combustion engine includes an air-fuel ratio sensor; fuel injection valves; an instructed fuel injection amount control unit; and an imbalance determination unit configured: to acquire a time-differential-value corresponding value that is an amount of change per predetermined time in an output value of the sensor or a detected air-fuel ratio represented by the output value; to acquire a positive gradient corresponding value based on a positive value of the time-differential-value corresponding value; to acquire a negative gradient corresponding value based on a negative value of the time-differential-value corresponding value; to determine an imbalance determination threshold based on a magnitude of a ratio of the negative gradient corresponding value to the positive gradient corresponding value; and to determine whether inter-cylinder air-fuel ratio imbalance has occurred by comparing a magnitude of the negative gradient corresponding value with the imbalance determination threshold.03-21-2013
20130073183Open-valve Port Fuel Injection Of Alcohol In Multiple Injector Engines - An engine having two or more fuel injectors is disclosed, where at least one of the injectors is used to port fuel inject fuel into the cylinder when the air intake valve is open. The open valve port fuel injector is used to inject a fuel that has alcohol as a constituent and is the same fuel injected by another fuel injector. In other embodiments, the open valve fuel injector is used to inject an anti-knock fuel containing alcohol while a primary fuel, is introduced by another injector. The operation of the open valve fuel injector can be optimized to maximize the vaporization cooling. In other embodiments, the open valve fuel injector may be used in conjunction with direct injection of the primary fuel or the anti-knock fuel. Heavy EGR can be optimally used with the various embodiments.03-21-2013
20130060451ABNORMAL COMBUSTION DETECTION APPARATUS AND CONTROL UNIT OF INTERNAL COMBUSTION ENGINE - An abnormal combustion detection apparatus detects an abnormal combustion of an internal combustion based on a vibration waveform from a vibration sensor attached to the internal combustion engine. A gain circuit of the apparatus amplifies or attenuates the vibration waveform from the vibration sensor, an AD conversion circuit converts a waveform provided by the gain circuit to digital data, and a gain switching unit switches a gain of the gain circuit from a small gain value to a large gain value at a gain switch timing. The gain switching unit separates a large abnormal combustion from a small abnormal combustion in an abnormal combustion determination period for maximizing a dynamic range of an AD conversion circuit and for securely detecting a change of waveform amplitude in case of gain switching in an abnormal combustion detection operation.03-07-2013
20090271093OFF-LINE CALIBRATION OF UNIVERSAL TRACKING AIR FUEL RATIO REGULATORS - A fuel control system of an engine includes a simulation module and a control module. The simulation module generates a simulated pre-catalyst exhaust gas oxygen (EGO) sensor signal based on a simulated oxygen concentration of an exhaust gas. The simulation module determines a simulated pre-catalyst equivalence ratio (EQR) for the exhaust gas based on the simulated pre-catalyst EGO sensor signal. The control module generates a desired pre-catalyst EGO sensor signal based on a desired oxygen concentration of the exhaust gas. The control module determines a desired pre-catalyst EQR based on the desired pre-catalyst EGO sensor signal. The control module determines a cost function based on the simulated pre-catalyst EQR and the desired pre-catalyst EQR. The fuel control system is calibrated based on the cost function.10-29-2009
20130066536SENSOR OUTPUT MODIFIER - A modification to the “gas-topping” invention disclosed in WO 2008/064415 is disclosed in this specification. The modification involves measuring a sensor input such as that provided by a diesel engine diesel fuel rail pressure sensor (03-14-2013
20130066537APPARATUS FOR AND METHOD OF CONTROLLING FUEL INJECTION OF INTERNAL COMBUSTION ENGINE - A fuel injection control for an internal combustion engine is performed. A fuel injection start timing from a first fuel injection valve placed in one intake port branching off for each cylinder is set to introduce a spray of fuel into the cylinder at the timing of introducing intake air into the cylinder, and a start timing of fuel injection from a second fuel injection valve placed in the other branching intake port is set in synchronization with the completion of injection of the first fuel injection valve, to start fuel injections from the first fuel injection valve and the second fuel injection valve at these set injection start timings. Accordingly, mixing performance of a spray of fuel and air is increased, and thus, enabling improvements in drivability during deceleration (torque shock), fuel economy, and exhaust emissions.03-14-2013
20120197511FUEL INJECTION CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING INTERNAL COMBUSTION ENGINE - A fuel injection control apparatus includes a first injection controller, a second injection controller, and a selector. The first injection controller is configured to perform a first injection operation in an intake stroke and is configured to perform a second injection operation in a compression stroke. The second injection controller is configured to perform both the first injection operation and the second injection operation in the intake stroke. The selector is configured to select fuel injection performed by the first injection controller when an internal combustion engine is in a warm-up operating state and is configured to select fuel injection performed by the second injection controller when the internal combustion engine is not in the warm-up operating state.08-02-2012
20120116655METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases.05-10-2012
20120116654Control System of Internal Combustion Engine - The present invention provides a control system for an internal combustion engine capable of, in a case where fuel is injected from an injector for a plurality of times in a divided manner based on an operation status of the internal combustion engine, controlling an injection quantity of the injector accurately in light of variation in an injection quantity of the injector based on air-fuel ratio accuracy, while preventing performance deterioration of the internal combustion engine caused by the injection of fuel. An internal combustion engine control system of the present invention includes an injector for making a valve operate and injecting fuel by applying an excitation current to a coil and injecting fuel into a combustion chamber directly in a manner dividing into a plurality of times of fuel injection, the internal combustion engine control system includes means for determining invalid and valid pulse widths of the injector.05-10-2012
20130166178FUEL INJECTION PATTERN AND TIMING - A method is provided for operating an engine to limit soot emissions during fuel-enriched operation. The method includes operating the engine using a first fuel injection pattern and timing to inject fuel into a combustion chamber of the engine. The method further includes receiving a request for an increased engine power output and operating the engine using a second fuel injection pattern and timing to inject more fuel into the combustion in response to the request for the increased power output, where the second fuel injection pattern and timing is configured to minimize soot emissions during enriched fuel operations, such as during transient operations.06-27-2013
20100088009INJECTOR PROTECTION CONTROL METHOD AND COMMON RAIL FUEL INJECTION CONTROL SYSTEM - To reliably prevent a drop in the function of injectors resulting from a rise in the temperature of excess fuel in the injectors without having to add a new part.04-08-2010
20120150420Engine Idle Speed and Turbocharger Speed Control - Various methods are described for controlling engine operation for an engine having a turbocharger and direct injection. One example method includes performing a first and second injection during a cylinder cycle, the first injection generating a lean combustion and the second injection exiting the cylinder unburned into the exhaust upstream of a turbine of the turbocharger.06-14-2012
20120290195CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE - A control system for an internal combustion engine having a throttle valve disposed in an intake passage of the engine is provided. A wide-open intake air amount, which is an intake air amount corresponding to a state where the throttle valve is fully opened, is calculated according to the engine rotational speed, and a theoretical intake air amount, which is an intake air amount corresponding to a state where no exhaust gas of the engine is recirculated to a combustion chamber of the engine, is calculated according to the wide-open intake air amount and the intake pressure. An actual intake air amount of the engine is detected or estimated, and an exhaust gas recirculation ratio is calculated using the theoretical intake air amount and the actual intake air amount. The engine is controlled using the calculated exhaust gas recirculation ratio.11-15-2012
20110301827Control Device for Internal Combustion Engine - Even when an engine is started in various combustion states, an excessive increase in engine speed at the start of the engine is suppressed without an influence of the combustion states and with an excellent responsiveness. Ignition timing (or a combustion injection amount) at the start of an internal combustion engine is corrected in accordance with a crank angle cycle ratio which is a ratio of a combustion period crank angle cycle and a reference crank angle cycle.12-08-2011
20120016571CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - A series of combustion forms including initial low-temperature combustion, premixed combustion, and diffusive combustion are performed when an engine operates under a low load and a medium load. The initial low-temperature combustion is carried out by performing a small-amount injection while performing an operation for lowering the encounter rate between oxygen and a fuel spray in a cylinder, and thereby the heat generation rate is kept low and the amount of NOx generated is suppressed. The premixed combustion is carried out as fuel receives heat in the initial low-temperature combustion, and the amount of smoke generated is suppressed. The diffusive combustion is accomplished as fuel travels through the combustion field of the premixed combustion, and by controlling the fuel injection timing thereof, it is possible to suitably control the timing at which the heat generation rate reaches its maximum in the aforementioned series of combustion. Thereby, it is possible to concurrently suppress the amount of NOx generated, suppress the amount of smoke generated, and secure the required torque.01-19-2012
20090281710METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method and a device for operating an internal combustion engine to perform a lambda regulation without using a lambda sensor. Fuel is injected for combustion in a combustion chamber of the internal combustion engine. A first quantity of the internal combustion engine is ascertained, which allows a conclusion to be drawn about the behavior of an output quantity of the internal combustion engine, in particular of a torque. The method includes the following: 11-12-2009
20090063019APPARATUS FOR CONTROLLING QUANTITY OF FUEL TO BE ACTUALLY SPRAYED FROM INJECTOR IN MULTIPLE INJECTION MODE - In an apparatus, a shift quantity calculating unit tentatively shifts a reference fuel spray characteristic to an obtained actual fuel spray characteristic in a phase direction and in a magnitude offset direction while monitoring a distance between the reference fuel spray characteristic and the obtained actual fuel spray characteristic therebetween. The shift quantity calculating unit calculates a shift quantity between the reference fuel spray characteristic and the obtained actual fuel spray characteristic in the phase direction when the monitored distance is minimized. A phase correcting unit shifts the reference fuel spray characteristic by the calculated shift quantity in the phase direction to thereby correct the reference fuel spray characteristic.03-05-2009
20090299608METHOD AND CONTROL DEVICE FOR CALIBRATING A FUEL INJECTOR OF AN INTERNAL COMBUSTION ENGINE; COMPUTER PROGRAM AND COMPUTER PROGRAM PRODUCT - A method and a device, a computer program and a computer program product for implementing a method for calibrating a fuel injector of an internal combustion engine, including the following: a) Specifying a first relationship between an injection quantity and an actuating variable of the fuel injector for implementing the injection quantity, b) Specifying a setpoint injection quantity, c) Specifying at least one setpoint value for the actuating variable of the fuel injector according to the first relationship, or implementing the setpoint injection quantity, d) Determining an indicated work resulting from the implementation of the at least one setpoint value for the actuating variable, e) Comparing a variable as a function of the determined resulting indicated work to an expected value, f) Correcting the at least one setpoint value for the actuating variable of the fuel injector as a function of the comparison result.12-03-2009
20110218728METHOD AND APPARATUS FOR CONTROLLING AN ENGINE CAPABLE OF OPERATING ON MORE THAN ONE TYPE OF FUEL - A control system for an engine capable of operating on more than one type of fuel includes an engine control unit that determines a default fuel volume to be injected into the engine based on relevant engine parameters and characteristics of a default fuel type. A default mass fuel flow rate is derived from the default fuel volume and relevant engine parameters. The actual mass fuel flow rate into the engine is inferred from the mass air flow rate into the engine and the exhaust gas air-to-fuel ratio, which is determined using a wide range oxygen sensor. A fuel correction factor is calculated from the default mass fuel flow rate and the inferred mass fuel flow rate. The fuel correction factor is used to increment or decrement the default fuel volume in a subsequent fuel injection cycle thereby incrementing or decrementing the inferred mass fuel flow rate toward the default mass fuel flow rate.09-08-2011
20090281711ENERGY-EFFICIENT AUTOMOBILE - Disclosed is an automobile equipped with an engine having an electronically-controlled throttle valve adapted to have an opening angle which is controlled according to an accelerator-pedal depression amount. The engine further includes an accelerator pedal sensor, an actuator adapted to selectively open and close the throttle valve, and a controller. The controller is adapted to calculate a target throttle opening angle corresponding to the accelerator-pedal depression amount, and output a continuous control signal corresponding to the target throttle opening angle, to the actuator. The controller is operable, in a traveling environment of the automobile or an operating condition of the engine where a required engine power is less than an engine power corresponding to the target throttle opening angle, to convert the continuous control signal into a pulsed control signal, and output the pulsed control signal to the actuator.11-12-2009
20100036588METHOD OF CONTROLLING AN INJECTION QUANTITY OF AN INJECTOR OF AN INTERNAL COMBUSTION ENGINE - In a method for controlling the injection amount for an injector on an internal combustion engine, dependent on a given time period and the duration of the hold phase, the energy stored in the injector is calculated either with a correction value or with the voltage and charge values at the end of the hold phase.02-11-2010
20110264356ABNORMAL COMBUSTION DETECTING DEVICE FOR INTERNAL COMBUSTION ENGINE AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - The present invention has an object to make abnormal combustion of an internal combustion engine detectable by simple means at low cost. For this purpose, an abnormal combustion detecting device provided by the present invention uses a direct injection injector as means for detecting abnormal combustion. In the direct injection injector relating to the abnormal combustion detecting device, a sack chamber is provided at a tip end of a nozzle body, and a nozzle hole is formed to cause the sack chamber and a combustion chamber to communicate with each other. A needle is housed inside the nozzle body, and the sack chamber is opened and closed by the needle, whereby a fuel is directly injected into the combustion chamber. The abnormal combustion detecting device detects lift of the needle from a closing position by, for example, a sensor, and determines that abnormal combustion occurs in the combustion chamber by the fact that lift of the needle is detected at a non-operational time of the direct injection injector.10-27-2011
20120035833METHOD FOR ESTIMATING AN HYDRAULIC DWELL TIME BETWEEN TWO INJECTION PULSES OF A FUEL INJECTOR - A method is provided for estimating a hydraulic dwell time between a first injection pulse and a second injection pulse performed by a fuel injector of an internal combustion engine. The method includes, but is not limited to determining a value of an electric dwell time between the first injection pulse and the second injection pulse, estimating a value of an injector closing delay between an instant in which an electric closing command of the first injection pulse is generated and an instant in which the fuel injector closes, estimating a value of an injector opening delay between an instant in which an electric opening command of the second injection pulse is generated and an instant in which the fuel injector opens, and calculating a value of the hydraulic dwell time as a function of the electric dwell time value, of the injector closing delay value and of the injector opening delay value.02-09-2012
20120035831AIR-FUEL RATIO IMBALANCE AMONG CYLINDERS DETERMINING APPARATUS FOR A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - A judging device comprises a catalyst, an upstream air/fuel ratio sensor having an air/fuel ratio sensing element covered with a diffusion resistance layer, and a downstream air/fuel ratio sensor. The judging device performs main feedback control to equalize the air/fuel ratio indicated by the output value of the upstream air/fuel ratio sensor to an upstream target air/fuel ratio and sub-feedback control to equalize the output value of the downstream air/fuel ratio sensor to a downstream target value. The judging device acquires “an imbalance judging parameter” which increases with “the increase of the difference between the amount of hydrogen contained in the exhaust gas before the exhaust gas passes through the catalyst and that after the exhaust gas passes through the catalyst” according to the sub-feedback amount. When the imbalance judging parameter is larger than an abnormality judgment threshold, the judging device judges that an air/fuel ratio imbalance among the cylinders has occurred. The judging device does not make judgment on air/fuel ratio imbalance among the cylinders if a predetermined judgment prohibition condition is satisfied, for example, if the flow of the exhaust gas is a predetermined value or more.02-09-2012
20120143478FUEL INJECTION CONTROL METHOD FOR GDI ENGINE - It is possible to ensure good starting performance and operability of an engine, reduce starting time with improved combustion stability, and improve noise vibration harshness (NVH), regardless of whether the engine is started at low temperature even if a high-pressure fuel pump in a gasoline direct injection (GDI) engine breaks, without using an additional dedicated device.06-07-2012
20120271530INTERNAL COMBUSTION ENGINE CONTROL APPARATUS - There is obtained an internal combustion engine control apparatus that can accurately determine the state of coupling between an internal combustion engine and a driving device so as to appropriately control the internal combustion engine. An internal combustion engine control apparatus according to the present invention includes a reference value learning function that learns a real calculation value, as the reference learning value for a transmission gear, when there are satisfied a first condition that the vehicle speed detected by a vehicle speed sensor, the real rotation speed detected by a rotation sensor, and the throttle opening degree detected by a throttle opening degree sensor are in predetermined ranges and a second condition that the real calculation value indicating the ratio of the vehicle speed detected by the vehicle speed sensor to the real rotation speed detected by the rotation sensor is in a predetermined state.10-25-2012
20090287396FUEL PROPERTY DETERMINATION SYSTEM, AND FUEL PROPERTY DETERMINATION METHOD FOR INTERNAL COMBUSTION ENGINE - The fuel injection amounts into each cylinder are set on the assumption that a heavy fuel will be injected during the engine starting process, and a specific torque is allowed to be generated by combustion in a specific cylinder when a fuel with a specific property between those of the heaviest fuel and the lightest fuel is injected thereinto. When the torque generated in the specific cylinder is in a range at or around the specific torque, the property level of fuel to be injected during the engine starting process is determined to be in a level range at or around the specific property. When the torque generated in the specific cylinder is higher than the range around the specific torque, the property level is determined to be in a level range on the light fuel side of the level range around the specific property.11-19-2009
20090088953Method and Device for Controlling an Internal Combustion Engine - According to a method for controlling an internal combustion engine by which the tank ventilation operation and an adjustment of the basic mixture can be carried out simultaneously, the engine is operated with an open tank ventilation valve. A first fuel amount correction value is determined for correction of a basic pilot control value for the amount of injected fuel. The regeneration gas volume flow rate is subsequently varied by a predefined change amount. A second fuel amount correction value is determined for correction of the basic pilot control value. Based on the first and second correction values and the flow rate change amount, a third fuel amount correction value is calculated by which the basic pilot control value would have to be corrected to again regulate the exhaust gas composition with a closed tank ventilation valve. Based on the third correction value the basic pilot control value is corrected.04-02-2009
20110172899MULTI-PULSE INJECTION FUEL AND LOAD BALANCING CONTROL SYSTEM - A method for adjusting fuel injection quantities in an internal combustion engine configured to operate multi-pulse fuel injections in a cylinder of the engine includes monitoring in-cylinder pressure, determining a burnt fuel mass for main combustion based upon the in-cylinder pressure, determining a burnt fuel mass for post combustion based upon the in-cylinder pressure, determining a main fuel quantity offset based upon the burnt fuel mass for main combustion, determining a post fuel quantity offset based upon the burnt fuel mass for post combustion, and controlling fuel injections into the cylinder based upon the main fuel quantity offset and the post fuel quantity offset.07-14-2011
20090281709Method and device for operating an internal combustion engine - In a method for operating an internal combustion engine, a setpoint fuel quantity to be injected is subdivided into a first fuel quantity which is to be injected into an intake manifold of the internal combustion engine, and a second fuel quantity to be injected directly into a combustion chamber of the internal combustion engine. The subdivision of the fuel quantity is performed as a function of a temperature that is characteristic for the operation of the internal combustion engine, e.g., in a start of the internal combustion engine, and the ratio between the first fuel quantity and the second fuel quantity is continually modified as a function of the temperature.11-12-2009
20090287395ENGINE CONTROL DEVICE - An engine control device, which is capable of preventing fuel from being consumed more than necessary when a PTO device is in operation, is provided. An engine control device (11-19-2009
20090037082EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - An exhaust emission control device removes particulate matters contained in exhaust gas of an internal combustion engine and deposited in a particulate filter. The device has a catalyst judging block judging the catalytic activity of catalyst held in the particulate filter, an exhaust gas detecting block detecting a flow rate of the exhaust gas, an injection type selecting block selecting a first fuel injection type or a second fuel injection type according to the catalytic activity and the flow rate of the exhaust gas, and a fuel injection control block controlling fuel injected into the engine to heighten the temperature of the exhaust gas according to the first fuel injection type and to supply unburned hydrocarbons to the particulate filter according to the second fuel injection type.02-05-2009
20090037081ENGINE FUEL INJECTION CONTROL APPARATUS - A fuel injection control apparatus is provided with a supply control section, a stop control section, a timing estimating section and a torque recovery control section. The supply control section controls fuel supplied to an engine based on a detected prescribed vehicle running state. The stop control section stops supplying fuel upon detecting a first prescribed vehicle running state. The timing estimating section estimates a timing at which a drive train transmitting a drive force from the engine to a wheel will change from a non-drive state in which the engine rotates due to a force from the wheel to a drive state in which the wheel rotates due to a drive force of the engine. The torque recovery control section resumes supplying fuel upon detecting a second prescribed vehicle running state and stops resumption of fuel being supplied for a prescribed amount of time based on the timing.02-05-2009
20080275624METHOD AND APPARATUS TO CONTROL ENGINE RESTART FOR A HYBRID POWERTRAIN SYSTEM - There is provided a control scheme for restarting an internal combustion engine of a hybrid powertrain during ongoing vehicle operation. The method comprises generating a torque output from an electrical machine to rotate the engine, and determining an engine crank torque. The torque output from the electrical machine is selectively controlled based upon the engine crank torque. The engine is fired when rotational speed of the engine exceeds a threshold. An engine torque simulation model accurately determines engine compression pressures in real-time to accommodate changes in engine operating conditions, based upon present engine operating conditions.11-06-2008
20120041668Method for controlling the fuel supply in a cylinder of a four-stroke internal combustion engine with controlled ignition - Method for controlling the fuel supply in a cylinder of a four-stroke internal combustion engine with controlled ignition; the control method comprises the steps of: determining, prior to the exhaust phase, a first forecast (P02-16-2012
20080281502CONTROL APPARATUS FOR A SOURCE OF ROTATIONAL DRIVE FORCE - A control apparatus for controlling a source of rotational drive force based on a target rotational speed. The control apparatus includes a target model rotational speed calculation section, an actual rotational speed detection section, and a target rotational speed adjustment section. The target model rotational speed calculation section calculates a rotational speed corresponding to a target drive force of the source as a target model rotational speed. The actual rotational speed detection section detects an actual of the source. The target rotational speed adjustment section sets the target rotational speed by correcting a value of the target model rotational speed calculated by the target model rotational speed calculation section to gradually approach the actual rotational speed detected by the actual rotational speed detection section. Accordingly, hunting of the engine during control is prevented and the deviation between the actual rotational speed and the target rotational speed is reduced or prevented.11-13-2008
20080288160MONITORING SYSTEM FOR INTERNAL COMBUSTION ENGINE - An injection pulse output portion outputs an injection pulse to the fuel injector based on a target fuel injection timing and a target fuel injection quantity. A fuel injection monitor portion computes an actual fuel injection timing and an actual fuel injection quantity and determines that there is an malfunction in fuel injection when a difference between the actual fuel injection timing and a target fuel injection timing is larger than a specified value and when a difference between the actual fuel injection quantity and a target fuel injection quantity is larger than a specified value. According to a combustion mode, a torque monitor portion defines one of an air-quantity-base actual torque and a fuel-quantity-base actual torque as a malfunction determination actual torque to determine whether a torque malfunction exists. When the fuel injection malfunction exists, the air quantity base torque is defined as the malfunction determination actual torque.11-20-2008
20080288159Method and Device for Controlling an Internal Combustion Engine - An internal combustion engine is provided with at least one modulator for adjusting an air mass in a cylinder. It is also provided with an injection valve for metering fuel to which fuel is supplied via a fuel supply device. A maximum fuel quantity which can be metered to the cylinder per working stroke is determined. Depending on the maximum meterable fuel quantity, a maximum producible torque is determined. An air mass flow is determined depending on an air/fuel ratio to b adjusted and the maximum meterable fuel quantity is adjusted by controlling the at least one modulator for adjusting the air mass. The injection valve is controlled in accordance with the maximum meterable fuel quantity when the required torque is greater or equal the maximum producible torque.11-20-2008
20080294327CONTROL APPARATUS FOR INTERNAL-COMBUSTION ENGINE - Provision is made to avoid a fuel discharge timing and a fuel injection timing during the ordinary operation of the engine from being limited, by, upon the activation of an engine, making a high-pressure fuel pump perform high-pressure-fuel discharge operation prior to initial fuel discharge operation by a fuel injection valve and based on the condition of the resultant fuel-pressure rise, performing a diagnosis on whether or not a malfunction exists in a high-pressure fuel system.11-27-2008
20080312808FUEL INJECTION CONTROLLER FOR INTERNAL COMBUSTION ENGINE - A fuel injection controller for an internal combustion engine. The engine includes a fuel vapor treatment device having a collector for collecting fuel vapor generating in a fuel tank; a purge line that introduces purge gas into an intake passage of the engine, the purge gas being a mixture of fuel vapor released from the collector and air; and a purge valve provided in the purge line to adjust flow rate of the purge gas. The fuel injection controller corrects an amount of fuel injected from an fuel injection valve based on an amount of fuel vapor contained in the purge gas flowing into a combustion chamber of the engine. The fuel injection controller comprises an estimation section for estimating the inflow amount of the purge gas flowing into the combustion chamber based on a passed amount of purge gas that has passed through the purge valve and a compensation value for compensating transportation delay. The compensation value is set based on internal pressure of the intake passage and velocity of intake air that flows into the combustion chamber.12-18-2008
20090265082Engine Controller for Work Vehicle - An engine controller (10-22-2009
20090265081FUEL QUALITY DETECTION USING TORQUE AND ENGINE SPEED - An engine control system comprises a fuel quality calculation module and a fueling module. The fuel quality calculation module calculates a fuel quality value for fuel provided to an engine based on at least one operating parameter of the engine. The fueling module selectively increases an amount of fuel provided to the engine based on the fuel quality value.10-22-2009
20120296555METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine includes injecting a quantity of fuel in the engine per engine cycle. A total value of the fuel quantity is evaluated as the sum of a fuel quantity base value and a fuel quantity correction value. The fuel quantity base value is determined based on a requested value of engine torque to be generated in the engine cycle. The fuel quantity correction value is determined based on an engine torque error in a previous engine cycle, which is calculated as a difference between a value of engine torque generated in the previous engine cycle and the requested value of engine torque for the previous engine cycle.11-22-2012
20120296554Method for operating an internal combustion engine - A method for operating an internal combustion engine in which a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of the fuel, is determined during the warm-up of the internal combustion engine and an ideal fuel quantity, which is to be injected into at least one combustion chamber of the internal combustion engine during the warm-up, is ascertained therefrom.11-22-2012
20090118982FUEL INJECTOR WITH ELECTRIC SHIELD - A fuel injector for an internal combustion engine is provided. The fuel injector is equipped with a fuel pressure sensor, a sensor circuit such as an amplifier, and a valve actuator such as a piezoelectric actuator. The fuel injector also includes a conductive shield which is disposed between the sensor circuit and actuator drive terminals to supply electric power to the actuator and works to shield the sensor circuit from electric noises arising from the drive terminals, thereby minimizing the addition of the noises to an output of the fuel pressure sensor, as being processed in the sensor circuit, and ensuring the accuracy in determining the pressure of fuel based on the output of the fuel pressure sensor.05-07-2009
20080319637Injection quantity control unit and fuel injection system having the unit - An injection quantity control unit controls an injection quantity of a plurality of fuel injection valves, respectively. The unit includes a rotational speed obtaining device for obtaining a rotational speed of the engine, an integration value calculating device for calculating an integration value of the rotational speed, which is equal to or more than a predetermined rotational speed, in an explosion stroke of each of the cylinders, and a correcting device for correcting the injection quantity of the plurality of fuel injection valves based on the integration value of each of the cylinders so as to reduce variation in a rotational speed variation among the cylinders.12-25-2008
20080319636Engine Control System - An engine control system for an internal combustion engine with a fuel injector, comprises a combustion fuel quantity computing means for computing a combustion fuel quantity in a combustion cycle; and a residual fuel quantity computing means for computing a residual fuel quantity in the combustion cycle based on a difference between an injection fuel quantity of the fuel injector and the combustion fuel quantity.12-25-2008
20090024307METHOD AND DEVICE FOR THE ROBUST ESTIMATION OF THE RATIO OF INJECTION CONTROL PARAMETERS TO RESULTANT INJECTED FUEL QUANTITY - In a method for estimating at least one control parameter of an injection system in an internal combustion engine for a target injection quantity, the estimation of the control parameter is based on linear regression, which is determined between predefined grid points and calculated test points in an operating range of the injection system.01-22-2009
20110144892CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention aims to provide a control apparatus for an internal combustion engine that can precisely determine the presence or absence of blow-by of fresh air into an exhaust path in the internal combustion engine with a supercharger. A control apparatus for an internal combustion engine according to the present invention includes: a supercharger; an intake pipe pressure obtaining unit that detects or estimates an intake pipe pressure; an intake variable valve apparatus capable of changing a valve timing of an intake valve; an exhaust variable valve apparatus capable of changing a valve timing of an exhaust valve; a storing unit that stores information about a reference intake pipe pressure that is a value that depends on the valve timing of the intake valve but does not depend on the valve timing of the exhaust valve; a reference intake pipe pressure obtaining unit that obtains the reference intake pipe pressure for the valve timing of the intake valve; and a blow-by determining unit that determines the presence or absence of blow-by of fresh air into an exhaust side based on a result of comparison between the intake pipe pressure and the reference intake pipe pressure.06-16-2011
20110144891APPARATUS FOR AND METHOD OF CONTROLLING FUEL INJECTION OF INTERNAL COMBUSTION ENGINE - There is provided a configuration in which a cylinder which is in an inlet stroke when an internal combustion engine is in a stop (automatic stop) state is determined and stored, and when starting the engine upon detection of a start request, the fuel injection of an initial cycle to the cylinder, which has been determined as having been stopped in the inlet stroke when the engine was in the stop state before starting, is split into a plurality if injections at least including an injection before engine rotation, to thereby perform injections. As a result, startability is improved while suppressing pre-ignition at the time of starting.06-16-2011
20090055083FUEL INJECTION CONTROL DEVICE AND FUEL INJECTION CONTROL SYSTEM - A fuel injection control device controls an operation of an injector such that fuel to be injected into a combustion chamber per combustion cycle is divided and injected at least through a first injection and a second injection, which is performed with a larger fuel quantity than the first injection after the first injection. The fuel injection control device includes an acquiring section and a first combustion state estimating section. The acquiring section acquires a sensing value of cylinder pressure in the combustion chamber sensed with a cylinder pressure sensor. The first combustion state estimating section estimates an actual combustion state of the fuel injected by the first injection based upon a second combustion timing cylinder pressure sensing value attributable to combustion of the fuel injected by the second injection out of the cylinder pressure sensing values.02-26-2009
20090055082FUEL INJECTION CONTROL DEVICE AND FUEL INJECTION SYSTEM USING THE SAME - When an ignition key is switched off, an updated learning value is set as an immediately preceding learning value of a present trip, which is compared with an average value of start timing learning values in a predetermined number of trips up to and including the present trip. When a difference between the immediately preceding learning value of the present trip and the average value exceeds a predetermined range, a start timing learning value to be used at a startup of a next trip is not updated. When the difference between the immediately preceding learning value of the present trip and the average value fails within the predetermined range, the immediately preceding learning value of the present trip is written in an EEPROM and used as the start timing learning value at the engine startup of the next trip.02-26-2009
20120078491ENGINE CONTROL METHOD - The invention relates to a method for operating an internal combustion engine (03-29-2012
20080275625METHOD AND APPARATUS TO CONTROL ENGINE STOP FOR A HYBRID POWERTRAIN SYSTEM - A control scheme is provided for stopping an internal combustion engine of a hybrid powertrain during ongoing vehicle operation. The method, executed as program code in an article of manufacture comprises the following steps in the sequence set forth. First, engine operation is controlled to stop firing the engine. A damper clutch is controlled to lock rotation of the engine and the electro-mechanical transmission. Torque outputs from the first and second electrical machines are then selectively controlled to reduce engine speed. Torque outputs from the first and second electrical machines are then selectively controlled to stop rotation of the engine substantially near a predetermined crank position.11-06-2008
20090254262FUEL INJECTION MEASUREMENT AND DIAGNOSTICS - A system and method comprises operating an engine during a first cycle to drive a piston in a cylinder without energizing a fuel injector of the cylinder; acquiring first pressure data of the cylinder for a predetermined crank angle window during the first cycle; energizing the fuel injector for an energizing time during a second cycle; acquiring second pressure data of the cylinder for the predetermined crank angle window during the second cycle; calculating a pressure ratio difference average (PRDA) from the first pressure data and the second pressure data; and modifying the operation of the fuel injector based on the PRDA value.10-08-2009
20100228465VIBRATION DAMPING CONTROL DEVICE OF A DIESEL ENGINE VEHICLE - The vibration damping control device which performs damping of vibration of a vehicle body through a driving output control of a diesel vehicle in accordance with the present invention comprises a compensation component computing portion which computes a compensation component which compensates a wheel torque to suppress an amplitude of vehicle body vibration; and a control gain determining portion which determines a control gain for the compensation component, wherein, at a time point of reversion of the sign of the value of the compensation component, the control gain determining portion decreases the control gain when, before that time point, the value of the compensation component has deviated from a restriction range for variation of a fuel injection quantity determined based on engine operational condition, and increases the control gain when the value of the compensation component has not deviated from a restriction range for variation of a fuel injection quantity. Thereby, in the execution of the restriction of the fuel injection quantity variation, the wave form of the compensation component of the vibration damping control is maintained, and also, the effect of the vibration damping control becomes as large as possible.09-09-2010
20100250098Fuel saving apparatus - The present invention provides a fuel saving apparatus. More particularly, the present invention provides a fuel saving apparatus that provides information, such as vehicle speed, a fuel injection period, fuel efficiency and engine load, to a driver in real time, thereby enabling the driver to develop economic driving and economical driving habits, speed input unit09-30-2010
20100235071System for Limiting Engine Output Power by Controlling Fueling - A method for controlling fueling of an internal combustion engine is provided. The engine may include an intake manifold, one or more exhaust manifolds and a turbocharger coupled between the intake and exhaust manifolds. The method may comprise estimating an operating condition of the turbocharger, determining a maximum value of an operating parameter as a function of the estimated operating condition of the turbocharger, measuring a value of the operating parameter, determining an error value as a function of the maximum value of the first operating parameter and the measured value of the operating parameter, and limiting fuel supplied to the engine based on the error value.09-16-2010
20100211291ABNORMALITY DETECTION DEVICE - An abnormality detection device determines whether an injection correction amount of each cylinder at the time when maximum rotation numbers are equalized is outside a normal range if the equalization of the maximum rotation numbers among cylinders is completed in an idle stable state. The abnormality detection device determines that an abnormality exists on an injector side if the injection correction amount of a specific cylinder is outside the normal range and a rotation number fluctuation difference of the specific cylinder is in a normal range. The abnormality detection device determines that the abnormality exists on an engine side if the injection correction amount of a specific cylinder is outside the normal range and the rotation number fluctuation difference of the specific cylinder is outside the normal range.08-19-2010
20120245823AIR-FUEL RATIO CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - After rich control for controlling the air/fuel ratio of a mixture to be an air/fuel ratio richer than stoichiometric air/fuel ratio, lean control is carried out so that air/fuel ratio of the mixture formed in the combustion chamber is controlled to be an air/fuel ratio leaner by a predetermined degree than the stoichiometric air/fuel ratio, or the air/fuel ratio of the mixture is controlled to temporarily be the air/fuel ratio leaner by the predetermined degree than the stoichiometric air/fuel ratio. If lean control is carried out after rich control is finished, temporary lean control provides that a degree of how much the air/fuel ratio of the mixture is leaner than the stoichiometric air/fuel ratio when the air/fuel ratio of the mixture is controlled to be the air/fuel ratio leaner than the stoichiometric air/fuel ratio in lean control is lower than the predetermined degree according to the temperature of a catalyst.09-27-2012
20120245822EMISSIONS REDUCTIONS THROUGH MULTIPLE FUEL INJECTION EVENTS - A method is disclosed including operations to interpret an engine load level for a reciprocating piston internal combustion engine. In response to determining the engine load level is less than 40% of a maximum engine load level, the method further includes operations to performing a first fuel injection event including less than 25% of a combustion fuel amount, the first fuel injection event occurring before 10 degrees after top dead center (TDC), to perform a second fuel injection event including between 15% and 65% of the combustion fuel amount, the second fuel injection event occurring after 10 degrees after TDC, and to perform third fuel injection event comprising between 10% and 85% of the combustion fuel amount, the third fuel injection event occurring before 63 degrees after TDC.09-27-2012
20120245821Method and System for Pre-Ignition Control - Methods and systems are provided for addressing cylinder-to-cylinder imbalances in the incidence of pre-ignition and/or knock. Engine cylinders are fueled based on each cylinder's pre-ignition count to balance the incidence of pre-ignition in each cylinder. The fueling is adjusted to maintain engine exhaust at stoichiometry.09-27-2012
20090326787Method and Device for Operating an Internal Combustion Engine - During the operation of an internal combustion engine, a check is made whether the engine functions in an error-free manner in relation to the engine noise. If not, a current value of a cylinder-specific fuel quantity in a cylinder is determined. A check is made whether a current injected cylinder-specific fuel quantity in one of the cylinders is too low or high to check with respect to a cylinder-specific motor speed N_CYL, by comparing a current value of the cylinder-specific injection quantity in the relevant cylinder with a stored reference value of the cylinder-specific injection quantity of the relevant cylinder at the current operating point. A check with respect to the cylinder-specific motor speeds of one of the cylinders is deactivated, if the current injected cylinder-specific fuel quantity in the relevant cylinder is too low or high to check the relevant cylinder with respect to the cylinder-specific motor speed N_CYL.12-31-2009
20090138180METHOD FOR THE DIRECT RE-ENTRY IN THE CAI OPERATING MODE OF AN INTERNAL COMBUSTION ENGINE FOLLOWING A PULL FUEL CUT OFF PHASE AS WELL AS A PERTINENT CONTROL UNIT - For the direct re-entry in the CAI operating mode following a pull fuel cut off phase the CAI specific valve lift is maintained during its pull fuel cut off phase. Upon a request signal for the CAI re-entry after the closing time of the particular cylinder, an advance fuel injection quantity is injected in the combustion chamber and externally ignited and combusted in the following CAI interim compression phase of the exhaust stroke, as a result of which hot exhaust gas is formed in the combustion chamber, fresh air is drawn into the combustion chamber during the following intake stroke, a main fuel injection quantity is injected in a main compression phase during the following compression stroke, and the exhaust gas content brought about from the earlier auxiliary fuel injection, is mixed with the air-fuel mixture newly introduced for the main ignition to form a self-ignitable, homogenous fresh air-exhaust gas-fuel mixture.05-28-2009
20120143479COMBUSTION CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - During high-load operation of an engine, fuel for initial slow-burning combustion and premixed combustion is injected into a combustion chamber by continuous fuel injection, then fuel injection is paused, and fuel for diffusion combustion is injected after a predetermined interval has elapsed. Also, the fuel injection amount in the continuous fuel injection is set higher than the fuel injection amount for diffusion combustion. A spray autointerference cooling effect is achieved by the continuous fuel injection, thus promoting ignition delay so as to increase the proportion of premixed combustion, thereby suppressing the production of smoke. This enables high-volume EGR to be performed, thus enabling reducing the amount of NOx produced.06-07-2012
20090037083Electronic Control Device For Controlling The Internal Combustion Engine In A Motor Vehicle - An electronic control device according to the invention is disclosed for controlling the internal combustion engine in a motor vehicle, for fault recognition with an irregular running determination unit and with an injection quantity correction unit, a defined group of cylinders being associated with a lambda probe, the injection quantity of a cylinder to be investigated of the defined group is adjusted in the direction of lean by a differential adjustment value associated with an irregular running differential value, and the injection value of at least one of the remaining cylinders, which are associated with the same lambda probe, is correspondingly adjusted in the direction of rich, so that in total a predetermined lambda value of this group of at least approximately 1 is reached. Homogeneous operation is thus ensured. The differential adjustment values may, for example, relate to the injection quantity itself, the injector stroke or the injection time. In this manner, a differential adjustment value individual to the cylinder is adjusted for each cylinder of the defined group. Correction values individual to the cylinder are then determined in that the differential adjustment values individual to the cylinder are related to one another.02-05-2009
20130138328START CONTROL DEVICE OF COMPRESSION SELF-IGNITION ENGINE - A start control device of a compression self-ignition engine is provided. The device includes: a determining module for determining whether a piston of a compression-stroke-in-stop cylinder that is stopped on a compression stroke according to an automatic stop is within a specific range set on a bottom dead center side of a predetermined reference stop position; an injection control module for controlling each fuel injection valve to inject fuel into the compression-stroke-in-stop cylinder first after the piston of the compression-stroke-in-stop cylinder is determined to be stopped within the specific range and the engine restart condition is satisfied; and an in-cylinder pressure estimating module for estimating an in-cylinder pressure of the compression-stroke-in-stop cylinder at a first top dead center on the compression stroke in the restart, where the piston of the compression-stroke-in-stop cylinder reaches after the restart starts.05-30-2013
20130144509DIESEL FUEL ENGINE INJECTION SYSTEM AND METHOD THEREFOR - Disclosed is a method of injecting LPG gas into a diesel fuel engine for combustion with diesel fuel therein. One aspect includes injecting LPG gas into an air-stream of an engine air intake or manifold, measuring the percentage of LPG gas injected into the airstream or other efficiency gauge, varying the rate of injection of LPG gas into the airstream in response to the measured percentage of LPG gas therein and injecting the LPG gas at a pre-determined rate so as to maintain an LPG gas concentration in the air intake stream in the range of 0.2% to 0.6% by volume of LPG gas.06-06-2013
20130144511CONTROL OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a method of operating an internal combustion engine using liquid pilot fuel, which engine (06-06-2013
20110010077DEVICE FOR CONTROLLING QUANTITY OF INJECTED FUEL - A control device has a CPU for determining an opening time and a conversion time, set in a non-injection period between preceding and present injections, in an interception process every fuel injection, and a control circuit for controlling a converting unit, independent of the operation of the CPU, to convert an analog signal, indicating fuel pressure of an injector, into a converted value at the conversion time. The CPU determines a closing time from the opening time and the converted value in another interception process. The device has a driving circuit for starting the valve opening at the opening time to open the injector and to inject fuel from the opened injector into an engine and starting the valve closing at the closing time to close the injector and to stop the fuel injection when the injected fuel reaches a required quantity.01-13-2011
20110040474FUEL INJECTION CONTROL DEVICE OF ENGINE - Increase in combustion noise and deterioration of exhaust gas performance caused by inter-cylinder correction are prevented, and decrease in temperature rise performance of a diesel particulate removal device caused by inter-cylinder correction is prevented. A fuel injection control device of an engine comprises inter-cylinder correction amount calculation means 02-17-2011
20120035832HIGH OPERATION REPEATABILITY AND STABILITY FUEL INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - A fuel injection system for an internal combustion engine, comprising: at least one fuel electroinjector; and one electronic control unit designed to supply the fuel electroinjector, in a fuel injection phase in an engine cylinder, with at least a first electrical command to perform a pilot fuel injection, and a second electrical command to perform a main fuel injection. The first and second electrical commands are separated in time by an electrical dwell time such that the main fuel injection starts without interruption with respect to the pilot fuel injection. The electrical dwell time between the first and second electrical commands belongs to an electrical dwell time range in which the total fuel amount injected in the pilot and main fuel injections in a fuel injection phase in an engine cylinder is substantially constant.02-09-2012
20120245825CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - A control device is applied to an internal combustion engine capable of using CNG and gasoline by switching therebetween, and the CNG and the gasoline are associated, as fuel for use, with one and the other of two driving areas respectively, the driving areas being different from each other. The control device exceptionally switches the fuel for use from gasoline to CNG and implements an air-fuel ratio imbalance inspection (S09-27-2012
20120245824Diagnostic Device for Internal-Combustion Engine - An anomaly in a high-pressure fuel system of an internal combustion engine is diagnosed early on and with high precision, and, further, the anomaly site is identified. With respect to a diagnostic device for a direct injection internal combustion engine, there is provided: an injection correction amount computation means (09-27-2012
20110246048FUEL INJECTION CONTROLLER - When an engine driving condition has been changed from an idling condition to a vehicle running condition, a controller measures an idling period. When the idling period is longer than a determination time period immediately after the vehicle is started, a penetrating-force-decrease control is performed. Therefore, even when a piston temperature is relatively low and particulate matters are easily generated, it can be restricted that fuel adheres to the piston top-surface by performing the penetrating-force-decrease control. Further, in the penetrating-force-decrease control, since the fuel is injected at optimum injection timing, it can be avoided that emission and fuel economy are deteriorated.10-06-2011
20090254263APPARATUS FOR AND METHOD OF CONTROLLING FUEL INJECTION OF ENGINE - An apparatus for and a method of controlling a fuel injection in which, in fuel injection control of an engine including a variable valve mechanism that can change an inlet valve opening characteristic, when an intake air amount is changed by an operation of the variable valve mechanism after the fuel injection valve performs first injection, a fuel amount corresponding to the change in intake air amount is injected in second injection after the first injection, and the sum of the fuel amount injected in the first injection and the fuel amount injected in the second injection becomes a fuel amount corresponding to an intake air amount fixed at an inlet valve closing timing.10-08-2009
20100131179Diagnosis Function Detection Apparatus of Vehicle and Detection Method Thereof - A diagnosis function detecting apparatus of a vehicle is configured to detect a diagnosis function for diagnosing a malfunction of the vehicle, and a detecting method thereof. A method for detecting a malfunction diagnosis function of a vehicle may include detecting the operation condition of the engine of a vehicle, determining whether the accumulated operation time of the engine or the accumulated fuel consumption amount exceeds a predetermined value, determining whether the malfunction diagnosis function is in a normal condition when the accumulated operation time or the accumulated fuel consumption amount exceeds the predetermined value, and restricting the output torque of the engine or lighting a warning lamp when the malfunction diagnosis function is in an abnormal condition, or sustaining the normal driving condition when the malfunction diagnosis function is in a normal condition.05-27-2010
20110098906METHOD TO CHARACTERIZE AND CONTROL THE FLOW RATE OF A PULSE WIDTH MODULATING FUEL INJECTOR - A method of controlling a pulse width modulated fuel injector includes pumping fuel to the fuel injector with a variable-pressure fuel supply and commanding a mass flow. The method measures an actual fuel pressure of the variable-pressure fuel supply and adapts a duty cycle command for the fuel injector based upon an open loop calculation that utilizes both the commanded mass flow and the measured actual fuel pressure. The method may be characterized by an absence of controlling the actual fuel pressure of the variable-pressure fuel supply and may be further characterized by an absence of control by an electro-hydraulic regulator. The open loop calculation may use at least two coefficients.04-28-2011
20110098907ENGINE CONTROL DEVICE - In a vehicle in which an output of an engine is transmitted to a driving wheel through a transmission, an engine control device stops fuel injection of the engine, when engine rotational speed is above a preset specific fuel cut-off rotational speed while the vehicle is coasting; and restarts the fuel injection, when the engine rotational speed falls below a recovery rotational speed while the fuel injection is stopped, wherein the recovery rotational speed is below the specific fuel cut-off rotational speed. When determining that an operating state allows the stop and restart of fuel injection to be repeated, the engine control device sets a hunting-preventing fuel cut-off rotational speed based on an input shaft rotational speed of the transmission, wherein the hunting-preventing fuel cut-off rotational speed replaces the specific fuel cut-off rotational speed.04-28-2011
20110077841FUEL INJECTION AMOUNT CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE, CONTROL SYSTEM FOR POWER UNIT, AND FUEL INJECTION AMOUNT CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - A fuel injection amount control apparatus for an internal combustion engine includes an ECU that commands a learning-purpose injection when a first learning condition regarding operation state and a second learning condition regarding load connection state are satisfied, and calculates an injection performance value that corresponds to the actual injection amount based on the amount of change in rotation speed, and further determines whether a delay of the learning process is permitted based on whether the learning process, despite occurrence of the delay, can be completed before the injector performance reaches a permissible limit value, and forces, when the delay is not permitted, the load connection state to be a specific connection state so as to satisfy the second learning condition. When it is determined that the delay of the learning process is permitted, the delay is permitted until the two learning conditions are satisfied.03-31-2011
20110077840INTERNAL COMBUSTION ENGINE SYSTEM, FUEL INJECTION CONTROL METHOD OF INTERNAL COMBUSTION ENGINE, AND VEHICLE - The function determination of the air-fuel ratio sensor, including determination whether there occurs the rich-lean abnormality that is an abnormality where the air-fuel ratio sensor becomes less responsive to a change in the air-fuel ratio of the engine from the rich air-fuel ratio to the lean air-fuel ratio, is performed. When the engine is started up with motoring by the motor while the rich-lean abnormality flag F03-31-2011
20110082635COMPENSATING FOR RANDOM CATALYST BEHAVIOR - A method for calibrating an engine control module includes sampling a first signal from a first oxygen sensor located upstream from a catalyst. The first signal indicates an oxygen content of exhaust gas produced by an engine. The method further includes predicting a response of a second oxygen sensor located downstream from the catalyst using a model of the catalyst and the first signal and sampling a second signal from the second oxygen sensor. The method further includes determining a component of the second signal based on a difference between samples of the second signal and the predicted response. The component is due to gases other than oxygen. Additionally, the method includes calibrating the engine control module based on the component of the second signal. The engine control module controls an amount of fuel injected into the engine.04-07-2011
20110077842METHOD FOR TESTING A PRESSURE SENSOR OF A FUEL ACCUMULATOR DEVICE - In a method for testing a pressure sensor of a fuel accumulator device in an internal combustion engine, the pressure in the fuel accumulator device is altered and the influence of said alteration on the torque generated by the internal combustion engine is determined. A deviation of the measured alteration from the expected alteration is then calculated.03-31-2011
20120203447SYSTEM AND METHOD FOR MEASURING INJECTION PROCESSES IN A COMBUSTION ENGINE - A system for measuring an injection process in a combustion engine includes a tank configured to hold a fuel. A storage container is configured to hold a compressed fuel. At least one injection valve is arranged at the storage container. A fuel line in which a fuel conveying pump and a high-pressure fuel pump are arranged. The fuel conveying pump and the high-pressure fuel pump are configured to convey the fuel into the storage container. A first pressure sensor is configured to measure a pressure in the storage container. A detection device is configured to detect control data of the at least one injection valve. A measuring device is arranged in the fuel line. The measuring device is configured to measure a temporally resolved volumetric or gravimetric flow process. A processor is connected to the measuring device and to the first pressure sensor via a data transmission line.08-09-2012
20120303248ABNORMALITY DETECTION APPARATUS AND ABNORMALITY DETECTION METHOD FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - An abnormality detection apparatus for a multi-cylinder internal combustion engine changes a fuel injection quantity of a predetermined target cylinder to detect an abnormality of an internal combustion engine based on values of rotational variations relating to the target cylinder detected before and after the change of the fuel injection quantity. The abnormality detection apparatus corrects the values of the rotational variations relating to the target cylinder detected before and after the change of the fuel injection quantity based on at least one of the number of revolutions of the engine and an engine load at a corresponding detection time.11-29-2012
20120303247CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A cylinder-inflow EGR gas quantity determining arrangement estimates or senses a value of a cylinder-inflow EGR gas quantity, which is a quantity of EGR gas that flows into a cylinder of an internal combustion engine. A misfire predicting arrangement predicts whether misfire occurs based on the value of the cylinder-inflow EGR gas quantity and an operational state of the internal combustion engine. A misfire-avoidance control arrangement executes at least one misfire-avoidance control operation to avoid the misfire when the misfire predicting arrangement predicts that the misfire occurs.11-29-2012
20120303246METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine, in which fuel is injected into a combustion chamber of the internal combustion engine with the aid of an injector, a variable which characterizes a slope of a straight line or of a curve which has at least some sections in the shape of a straight line, being ascertained, the straight line or straight line-shaped curve linking activation times of the injector to the appropriate difference values, and a difference value being formed by the difference between an instantaneous closing point in time and a reference closing point in time or between an instantaneous injection quantity and a reference injection quantity, and a measure for a coking of the injector being ascertained from the ascertained variable.11-29-2012
20120303245ROBUST ESTIMATION OF BIODIESEL BLEND RATIO FOR ALTERNATIVE FUEL COMBUSTION - A method to control an internal combustion engine includes operating the engine with a fuel blend of a first fuel and a second fuel, monitoring a value of a first combustion parameter during engine operation, monitoring a first value for a second combustion parameter during engine operation, determining a second value for the second combustion parameter in accordance with a predetermined correspondence among the first combustion parameter, the second combustion parameter, and a predetermined fuel blend of the first fuel and the second fuel, determining the fuel blend based upon a difference between the first and second values for the second combustion parameter, and controlling the engine based upon the fuel blend.11-29-2012
20110060514FUEL INJECTION CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - A fuel injection control apparatus of an internal combustion engine of the present invention performs control for a common rail diesel engine so that at a timing when a piston reaches compression top dead center, the rate of heat production due to the combustion of fuel injected in pre-injection is substantially maximal, and furthermore so that the combustion of fuel injected in main injection is started in the vicinity of this timing. As a result, the combustion of fuel injected in main injection is started by fully utilizing the heat production amount due to the pre-injection. Also, this avoids the production of reverse torque, as well as ensures maximizing the amount of torque produced by the combustion of fuel injected in main injection.03-10-2011
20130166180CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - A control device for an internal combustion engine provided with an intake air pressure sensor and an airflow meter includes a calculation unit for calculating a fuel injection quantity on the basis of a negative pressure of intake air measured by the intake air pressure sensor when a cranking motor starts cranking the internal combustion engine, and a switching unit for switching to calculation of the fuel injection quantity on the basis of an intake air flow rate measured by the airflow meter when a change value in an actual intake air quantity becomes smaller than a reference value.06-27-2013
20130166179Method and Device for Operating an Injection Valve - An injection nozzle has a nozzle needle that suppresses metering of fluid in a closed position and otherwise allows the metering of fluid. Furthermore, the injection valve has a solid-state actuator that acts on the nozzle needle. A first operating phase is performed for a closing operation in a first operating mode, during which first operating phase the solid-state actuator is discharged to a predefined part charge. Furthermore, a second operating phase is performed, during which the solid-state actuator is operated as a sensor. An operating duration of the second operating phase is predefined such that the closed position of the nozzle needle is reached during the operating duration. A third operating phase is performed, during which the solid-state actuator is discharged further to a predefined reference state. In a second operating mode, the first and second operating phases are carried out and the third operating phase is omitted.06-27-2013
20120203446CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - To provide a control apparatus for an internal combustion engine that, in a turbocharged internal combustion engine including a waste gate valve, can favorably prevent an exhaust system part disposed downstream of a turbine from overheating, regardless of opening of the waste gate valve. The control apparatus includes a turbocharger having a turbine which is operative by exhaust energy and is disposed in an exhaust passage. The control apparatus further includes a WGV for opening or closing an exhaust bypass passage that bypasses the turbine. Timing to start fuel quantity increase control for preventing an exhaust system part, such as a catalyst, from overheating is advanced when the WGV is in an open state than when the WGV is in a closed state.08-09-2012
20120203445FUEL INJECTION CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE AND FUEL INJECTION CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - A fuel injection control for an internal combustion engine includes: estimating a convergence temperature of the exhaust gas catalytic converter; calculating an OTP boost value using the estimated convergence temperature; and estimating the convergence temperature on the assumption that the temperature decrement quantity of the exhaust gas catalytic converter which is caused by the power boosting is zero when both of the OTP boosting execution condition and the power boosting execution condition are met.08-09-2012
20120203444STARTUP CONTROL DEVICE FOR DIRECT-INJECTION INTERNAL COMBUSTION ENGINE - A startup control device is applied to a fuel injection system having a starter motor, which rotates a crankshaft of a diesel engine, a fuel pump that is driven by the engine, a common rail that accumulates a high-pressure fuel pumped by the fuel pump, and an injector that injects the high-pressure fuel into a cylinder. The startup control device includes an ECU that determines whether the startability of the engine is deteriorated. If the ECU determines that the startability of the engine is deteriorated, the ECU decreases the amount of fuel supplied from the common rail to the injector during one revolution of the crankshaft.08-09-2012
20090118983FUEL INJECTOR DESIGNED TO MINIMIZE MECHANICAL STRESS ON FUEL PRESSURE SENSOR INSTALLED THEREIN - A fuel injector for an internal combustion engine is provided. The fuel injector is to be installed in a cylinder head of the engine and has a fuel pressure sensor working to measure the pressure of fuel within a injector body. The fuel pressure sensor is installed in a portion of the injector body which is to be located away from the cylinder head of the engine across a portion of the injector body on which a mechanical pressure is exerted by an external member such as a fuel supply pipe or a fuel drain pipe, thereby keeping the fuel pressure sensor free from internal stress, as arising from the mechanical pressure exerted on the injector body, to ensure the accuracy in measuring the pressure of the fuel.05-07-2009
20090118981FUEL INJECTOR WITH FUEL PRESSURE SENSOR - A fuel injector for an internal combustion engine is provided. The fuel injector is equipped with a fuel pressure sensor which is installed in a metallic injector body. The fuel injector also includes an amplifier working to amplify an output of the fuel pressure sensor and a thermal insulating member disposed between the metallic injector body and the amplifier to shield the amplifier thermally, thereby ensuring the accuracy in measuring the pressure of fuel within the fuel injector.05-07-2009
20110257870INTAKE AIR CONTROL APPARATUS AND INTAKE AIR CONTROL METHOD FOR INTERNAL-COMBUSTION ENGINE - An intake air control apparatus for an internal-combustion engine includes an intake air adjusting device. An operating mode determination device is configured to determine whether the internal-combustion engine is in a predetermined high rotation speed and high load operation mode in which cooling is required by increasing an amount of fuel. An intake air reduction controller is configured to, if the operating mode determination device determines that the internal-combustion engine is in the predetermined high rotation speed and high load operation mode, control the intake air adjusting device so that an intake air amount is reduced in accordance with a rotation speed of the internal-combustion engine and an ignition timing in order to restrict a fuel injection quantity to be injected from a fuel injection valve so that the fuel injection quantity does not exceed a maximum fueling rate of the fuel injection valve.10-20-2011
20110004395Method for Operating an Internal Combustion Engine - In a method for operating an internal combustion engine for adjusting a desired fuel/air mixture, wherein the rotary speed is determined by an operating curve based on a fuel/air mixture composition, wherein the operating curve has ascending and descending branches and a maximum, wherein a lambda value is smaller than 1 on the descending branch, it is first determined by statistic evaluation whether the operating point is on the ascending or descending branch. In a second method step, when the operating point is not on a desired branch of the operating curve desired as a starting point for a third method step, at least one operating parameter is changed until the operating point is positioned on the desired branch. In a third method step, the maximum of the operating curve is determined. Based on the determined maximum, the desired operating point of the internal combustion engine is then adjusted.01-06-2011
20130197785NOX CONTROL - A method of controlling an engine based upon airflow is provided. A request for a desired torque output of the engine is received. A first amount of fuel required to generate the desired torque is retrieving from a memory. An amount of airflow required to combust the fuel required to generate the desired torque at a predefined air/fuel ratio is calculated. A first amount of EGR required to produce a predefined amount of NOx emissions is calculated. The amount of airflow required to the first amount of EGR required is added. The total of the airflow and the first amount of EGR are compared to a volume available in a cylinder. At least one of the first amount of fuel delivered and the first amount of EGR provided is modified when the total of the airflow and the EGR exceeds the total volume available in the cylinder.08-01-2013
20110264358ENGINE SYSTEM - An engine system includes: a mixture portion capable of mixing a first liquid as a main fuel with a second liquid at a predetermined mixture ratio; an engine to which a mixed fuel produced by mixing the first liquid with the second liquid is fed from the mixture portion; and a control portion controlling the mixture ratio of the mixed fuel to be a target mixture ratio based on a driving state of the engine. The control portion controls the target mixture ratio based on a feeding period from the time when the mixed fuel is fed from the mixture portion to the time when the mixed fuel arrives at the engine.10-27-2011
20110257871Air fuel ratio control device of engine - There is provided an air-fuel ratio control device comprising: fuel supply means; engine operation state detection means; air-fuel ratio information detection means; and an electronic control unit, the electronic control unit being configured to determine a fuel injection amount which realizes a target air-fuel ratio while using engine load information by the engine operation state detection means on the basis of air-fuel ratio information by the air-fuel ratio information detection means, and then output a driving signal to the fuel supply means, to execute feedback control mainly at an excessively rich side air-fuel ratio, characterized in that the air-fuel ratio information detection means is an exhaust gas temperature sensor, and while estimating an air-fuel ratio at this time on the basis of detected exhaust gas temperature information by a predetermined obtaining method, the air-fuel ratio is used for the control.10-20-2011
20100292911SYSTEMS AND METHODS FOR USING SECONDARY FUELS - The present application provides a system and method for determining a secondary fuel amount for an engine. The method comprises measuring an injector signal from an engine's Engine Control Unit (ECU) for a primary injector. A delay time of the primary injector can be determined using a lookup table. An open time can be calculated based on the delay time and the primary timing value. An amount of fuel to be injected into the engine can be calculated based on the primary injector open time. An amount of secondary fuel equivalent to the amount of primary fuel can be determined. A timing value for a secondary injector signal for the secondary injector can be calculated to deliver the amount of secondary fuel to the engine.11-18-2010
20110125391PRESSURE ENERGY CONVERSION SYSTEMS - A process for performing energy conversion that converts pressure energy to produce expansive work in one or more devices selected from the group including a reversible fuel cell, expansion motor, and heat releasing combustor.05-26-2011
20110125390Driveline system impact reverberation reduction - A method for driveline impact reverberation reduction including operating an engine coupled to a transmission; regulating operation of the engine with a controller to adjust fueling of the engine which includes providing a signal to the controller representative of a requested engine torque; determining a first fueling rate as a function of the signal and a set of preselected operating instructions; adjusting a set of engine operating parameters according to the first fueling rate; determining a second fueling rate as a function of the first fueling rate; and adjusting a set of engine operating conditions according to the second fueling rate.05-26-2011
20120150417METHOD FOR DIAGNOSING A CLOGGING OF AN INJECTOR IN AN INTERNAL COMBUSTION ENGINE - A method is provided for diagnosing a clogging of an injector in an internal combustion engine equipped with a fuel rail and with a plurality of fuel injectors hydraulically connected to the fuel rail. The method includes, but is not limited to determining a value of a pressure drop in the fuel rail due to a quantity of fuel injected by a tested injector, and diagnosing the clogging of the tested injector if the determined pressure drop value is lower than a threshold value of this pressure drop.06-14-2012
20120310510CONTROL SYSTEM AND CONTROL METHOD OF GAS ENGINE - A control system for controlling a power output of a gas engine of the present invention includes a target value setting section for setting as a target value a restricted power output which is less than a predetermined power output when a source gas pressure of a gas fuel is less than a predetermined value required to inject the gas fuel against an intake-air pressure according to the predetermined power output, a power output setting section for setting a set value of a power output based on the target value set by the target value setting section, and a power output control section for controlling the power output so that the power output reaches the set value set by the power output setting section.12-06-2012
20120310509Dual fuel engine system - A dual fuel system employs a liquid fuel supply subsystem and a gaseous fuel supply subsystem for an engine. The liquid fuel supply subsystem supplies liquid fuel to the engine and an electronic control module is configured to control, via one or more liquid fuel control signals, the amount of liquid fuel supplied to the engine based on one or more sensor signals. A gaseous fuel supply subsystem is configured to supply gaseous fuel to the engine and an electronic controller subsystem responsive to liquid fuel control signal(s) determines, based on the liquid fuel control signals, a modified amount of liquid fuel and an amount of gaseous fuel to be supplied to the engine for dual fuel operation.12-06-2012
20120150416Air-fuel ratio control system - Even if the engine structure is not capable of continuous operation in the vicinity of stoichiometric air-fuel ratio, this engine is in the stoichiometric combustion region when condition such as low load and stable engine rotation is met, and the feedback control using the O2 sensor, although temporary, becomes possible. Therefore, the air-fuel ratio control system performs this feedback, and derives and sets the constant value for correction to attain the air-fuel ratio suited to the engine. Thereafter, the optimal air-fuel ratio is controlled at the normal control mode just by correcting the fuel injection quantity using the constant value.06-14-2012
20100030454PROCEDURE FOR DETERMINING THE INJECTED FUEL MASS OF A SINGLE INJECTION AND DEVICE FOR IMPLEMENTING THE PROCEDURE - A method for determining a fuel mass of a single injection that has been injected into at least one combustion chamber of a combustion engine with at least one injection under high pressure. The method includes determining a correction variable for the single injection with the aid of a comparison of a measure for the actual amount of the injected fuel of at least one test injection, which takes place due to a measure for a default nominal amount of a desired single injection, and a measure for the nominal amount of the test injection. The method additionally includes executing a plurality of timely directly successive test injections.02-04-2010
20100030451ENGINE BOOST CONTROL FOR MULTI-FUEL ENGINE - A fuel delivery system for an internal combustion engine and a method of operating the fuel delivery system is described. As one example, the method includes delivering a first fuel blend from a first fuel tank to the engine; delivering a second fuel blend from a second fuel tank to the engine, the proportion of said second fuel blend delivered to the engine to said first fuel blend delivered to the engine being related to the desired engine output; transferring said first fuel blend from said first fuel tank to said second fuel tank to prevent an amount of said first fuel blend and said second fuel blend in said second fuel tank from falling below a predetermined level; and boosting air delivered to the engine, the amount of boosting being related to latent heat of vaporization of said second fuel blend delivered to the engine.02-04-2010
20100030452High Pressure Oil Limit Based on Fuel Level To Protect Fuel Injectors - A first fuel value (FL_Signal) indicative of the quantity of fuel presently in a fuel tank (02-04-2010
20120041667DEVICE AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE, COMPUTER PROGRAM, COMPUTER PROGRAM PRODUCT - In a method for operating an internal combustion engine having a first injection valve for a first combustion chamber and a second injection valve for a second combustion chamber, the engine is operated in a first operating mode in which the fuel is injected by the first and by the second injection valve, and a first operating characteristic of the engine is determined during the first operating mode. The engine is further operated in a second operating mode in which injection of fuel by the first injection valve is suppressed, and a second operating characteristic of the engine is determined during the second operating mode. The first and second operating characteristics are compared, and, as a function of the comparison, the engine is operated in the second operating mode or in a third operating mode in which injection of fuel by the second injection valve is suppressed.02-16-2012
20110307162CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - A control device in an IC engine estimates a future cylinder inside air quantity by delaying an operation of a throttle to make responsiveness of the IC engine and estimation precision of the cylinder inside air quantity compatible with each other. A delay time is provided in a calculation process until an instructed TA is outputted after a required KL is inputted. When calculation timing of a fuel injection quantity comes, an actual KL which is achieved in a time ahead by the delay time from the present time is estimated by using an air response model. When a read-ahead time of an intake valve exceeds the delay time, a change amount of the actual KL is estimated by using an air response model with a deviation between an estimated KL after td and a target KL set as a step input value.12-15-2011
20120041666METHOD FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE - A method is disclosed for controlling an internal combustion engine having a plurality of fuel injectors, each for injecting fuel into one combustion chamber of the internal combustion engine, comprising the following steps: activating the fuel injectors in order to supply a first target total fuel quantity using a first injection strategy, ascertaining a first actual total fuel quantity injected during the activation using the first injection strategy, activating the fuel injectors in order to supply a second target total fuel quantity using a second injection strategy, wherein at least one of said fuel injectors being activated differently from said first injection strategy during said second injection strategy, ascertaining a second actual total fuel quantity injected during the activation using the second injection strategy, and determining an operating behavior of at least one of the fuel injectors as a function of the first actual total fuel quantity and the second actual total fuel quantity.02-16-2012
20120065870FUEL INJECTION AMOUNT CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A fuel injection amount control apparatus calculates as a proportional term a value obtained by multiplying by a proportional gain Kp a deviation DVoxslow between a downstream side target value Voxsref and an output value Voxs of a downstream side air-fuel ratio sensor disposed downstream of a catalyst. The control apparatus calculates a time integrated value SDVoxslow by integrating a value obtained by multiplying by a predetermined adjustment gain K the deviation DVoxslow, calculates a value that is commensurate with the time integrated value SDVoxslow as an integral term Ki×SDVoxslow, and obtains the integral term Ki×SDVoxslow as a sub-FB learned value KSFBg. The control apparatus sets the proportional gain Kp at a small value after the sub-FB learned value KSFBg is determined to have converged, and sets the adjustment gain K at a small value after the sub-FB learned value KSFBg is determined to have converged.03-15-2012
20120150419Fuel Injector Diagnostic for Dual Fuel Engine - Various systems and methods are described for controlling fuel injection of a dual fuel engine which includes first and second fuel rails and first and second fuel pumps. In one example, while pumping is suspended in the second fuel rail, the first fuel is injected to all but one cylinder of the engine and the second fuel is injected to the one cylinder in a predetermined sequence. As such, the fuel injector injecting to the one cylinder is isolated and its performance may be assessed without significantly affecting engine performance.06-14-2012
20120046853System and Methods for Improved Efficiency Compression Ignition Internal Combustion Engine Control - The present invention relates to a compression ignition engine control system and methods for improving fuel efficiency. The system includes a fuel processor which receives instructions for a desired engine output and current operating conditions. The fuel processor generates fueling instructions for a plurality of cylinders. The fueling instructions include a low power skip fire mode of operation and a high power mode of operation. The instructions substantially regulate fuel delivery into to a first group of cylinders at or near optimal efficiency fuel levels during each of their respective working cycles. Likewise, the instructions may either substantially disable fuel injection into to a second grouping of cylinders or regulate fuel injection into to the second grouping of cylinders at an elevated high power fuel to air ratio. The fuel processor may include a synchronizer for synchronizing firing of the cylinders with the engine speed. Likewise, the fuel processor may include a sigma delta control circuit for generating a firing pattern that utilizes predictive adaptive control.02-23-2012
20100023244Regulating Method for a Volume Control - In a regulating method for controlling an electrical actuator, especially a valve for regulating a volume flow in an injection system for an internal combustion engine, a nominal value is set for an actuating variable of the actuator; the actuator is controlled by a pulse width-modulated electrical control signal with a pre-defined pulse duty factor and a pre-defined period for adjusting the desired nominal value of the actuating variable; a flow threshold value is determined according to the pre-defined nominal value for the actuating variable; the flow flowing through the actuator is continuously measured during the control by the control signal and before the end of the period; the measured flow is compared with the flow threshold value/and the flow flowing through the actuator is switched off before the end of the period of the control signal if the measured flow exceeds the current threshold value.01-28-2010
20120004832METHOD AND DEVICE FOR OPERATING A DRIVE UNIT - A method for operating an internal combustion engine includes: providing a desired power specification for triggering the drive unit; providing a specification of operating point-dependent power ranges for the supplied desired power specification, in which steady-state operation of the drive unit is permissible, a power range that is not permissible in the steady state being defined between the operating point-dependent power ranges; when a change in the desired power specification for the drive unit in a transitional operating mode necessitates traversing the power range that is not permissible in the steady state, triggering the drive unit on the basis of a specification of a guided desired power, the guided desired power specification being determined by guiding the desired power specification.01-05-2012
20120004833Method for Operating an Internal Combustion Engine with an Emission Control System - A method for operating an internal combustion engine comprising an emission control system that includes at least one catalytic and/or filter-effective emission control component. In conjunction with a cold start and/or a warm-up of the internal combustion engine, the internal combustion engine is operated using a cold start engine operation process having predefined values for predefined operating parameters of the internal combustion engine. An amount of hydrocarbons (HC) stored in one or more of the at least one emission control component is estimated, and the cold start engine operation process is activated when the estimation indicates that the amount of stored HC exceeds a predefined maximum amount of stored HC.01-05-2012
20120004834DEVICE AND METHOD FOR CONTROLLING FUEL INJECTION IN AN ENGINE DEPENDING ON THE EXHAUST GAS PARTIAL RECIRCULATION RATE - A device for controlling fuel injection in an internal combustion engine of an automobile, the internal combustion engine being connected at an inlet thereof to a fresh air intake pipe and at an outlet thereof to an exhaust gas discharge pipe including a catalytic converter, an exhaust gas partial recirculation circuit connecting the discharge pipe to the fresh air intake pipe. The device includes a mechanism determining the amount of unburned fuel in the exhaust gases, a mechanism determining the amount of fresh air taken into the internal combustion engine, and an electronic controller determining the amount of fuel to be injected depending on signals received of the determined amount of unburned fuel and the determined amount of fresh air taken in.01-05-2012
20090063018FUEL INJECTION SYSTEM WITH INJECTION CHARACTERISTIC LEARNING FUNCTION - A fuel injection system designed to learn the quantity of fuel sprayed actually from a fuel injector into an internal combustion engine. When the engine is placed in a given learning condition, the system works to spray different quantities of the fuel for different injection durations in sequence to the engine through the fuel injector to collect a plurality of data on the quantity of the fuel sprayed actually from the fuel injector. The system analyzes the corrected data to determine an injection characteristic of the fuel injector, which may have changed from a designer-defined basic injection characteristic of the fuel injector, and uses the injection characteristic in calculating an injection duration or on-duration for which the fuel injector is to be opened to spray a target quantity of fuel.03-05-2009
20110166771FUEL CONTROL SYSTEM - A fuel control system of the present invention is a fuel control system that controls a fuel injection quantity of an internal combustion engine by controlling combustion of a fuel at a theoretical air-fuel ratio, and is characterized in that the fuel control system estimates a volume of the fuel injection quantity from a measured refractive-index value of the fuel and controls it.07-07-2011
20120016569FUEL INJECTION CONTROL SYSTEM - A fuel injection control system provided with a throttle by wire (TBW) system detecting an operation condition of a throttle grip and controlling, via an actuator, a throttle valve. The control system detects the throttle valve opening and controls an injector. An increased quantity correction value is determined based upon of an output of a throttle valve opening sensor and an operation condition of the throttle grip. When an acceleration condition of a vehicle is detected according to the output of the throttle valve opening sensor, an increased quantity correction of fuel is performed. The increased quantity correction value is brought to an attenuation condition in which the increased quantity correction value is gradually decreased, or a stop condition in which the increased quantity correction value is made to zero, when the throttle grip is not in drive in an opening direction, even though an acceleration condition is detected.01-19-2012
20120016570Engine Governor - An engine governor (01-19-2012
20080208437Fuel-Injector For Internal-Combustion Engine, Methods of Controlling Fuel-Injector, Electronic Control Unit for Fuel-Injector, and Fuel Injection System for Direct Fuel-Injection Engine - There was a problem that various fuel spray shapes cannot be obtained according to operating conditions of a direct injection engine. There is provided a giant magnetostrictive element type injector which controls the change rate (rising slope) or peak value of a supply current applied to a solenoid for magnetic field generation which displaces a giant magnetostrictive element according to requests of an engine. The steeper the rising slope of the supply current to the solenoid, the higher becomes a lifting speed of a plunger, the higher becomes the initial speed of a fuel spray, and the longer the penetration can be. The gentler the rising slope thereof, the lower becomes the lifting speed of the plunger, the lower becomes the initial speed of the fuel spray, and the shorter the penetration can be. Further, the larger the peak value of the supply current, the larger the lift amount of the plunger can be and the larger becomes the fuel flow rate, allowing an increase in fuel spray density (resulting in a fuel spray that is not easily crushed). The smaller the peak value of the supply current, the smaller becomes the fuel flow rate, allowing a decrease in fuel spray density (resulting in a fuel spray that is easily crushed).08-28-2008
20120059570WARM-UP CONTROL APPARATUS FOR GENERAL-PURPOSE ENGINE - In an apparatus for controlling warm-up operation of a general-purpose internal combustion engine having a throttle valve installed in an air intake pipe and connectable to an operating machine to be used as a prime mover of the machine, it is configured to calculate a basic fuel injection amount based on an engine speed and a throttle opening and control engine warm-up operation by calculating a warm-up time fuel injection amount by correcting the calculated basic fuel injection amount based on one of a temperature change amount of a spark plug seat of the engine, the throttle opening and an output of the operating machine and injecting fuel from an injector by the calculated warm-up time fuel injection amount. With this, it becomes possible to calculate a fuel injection amount suitable for the engine warm-up condition by using an appropriate parameter in place of the lubricating oil temperature.03-08-2012
20120059569CONTROL APPARATUS FOR GENERAL-PURPOSE ENGINE - In an apparatus for controlling a general-purpose engine used as a prime mover of an operating machine, the apparatus regulating a throttle opening such that an engine speed is converged to a desired engine speed, calculating a basic fuel injection amount based on the engine speed and throttle opening, and controlling engine warm-up operation by correcting the basic fuel injection amount with a correction coefficient to calculate a warm-up time fuel injection amount after engine start is completed and injecting fuel by the calculated amount, a fuel injection amount with which the engine output becomes maximum is searched based on the throttle opening regulated in response to increase/decrease operation of the warm-up time fuel injection amount conducted when the engine speed is constant; and the correction coefficient is corrected using the searched fuel injection amount. With this, a warm-up correction coefficient appropriate for the engine warm-up condition can be calculated.03-08-2012
20120209499BOOSTED ENGINE CONTROL RESPONSIVE TO DRIVER SELECTED PERFORMANCE - Various systems and methods are described for operating an engine in a vehicle in response to a driver performance/economy mode. One example method comprises delivering a first fuel to a cylinder of the engine from a first injector, delivering a second, different, fuel to the cylinder of the engine from a second injector, varying a relative amount of said first and second fuel as an operating condition varies; and adjusting delivery of at least said second fuel based on a driver-selected performance mode.08-16-2012
20120158272METHOD AND SYSTEM FOR CONTROLLING FUEL USAGE - Methods and systems are provided for improving fuel usage while addressing knock by adjusting the use of spark retard and direct injection of a knock control fluid based on engine operating conditions and the composition of the injected fluid. One or more engine parameters, such as EGR, VCT, boost, throttle position, and CMCV, are coordinated with the direct injection to reduce torque and EGR transients.06-21-2012
20120158271METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine, in particular, of a motor vehicle. The internal combustion engine includes an injector having a nozzle needle for injecting fuel into a combustion chamber of the internal combustion engine, as well as an output stage component. A desired signal is specified for a lift characteristic of the nozzle needle. The injector is activated by the output stage component. A lift signal is ascertained that corresponds to the actual lift characteristic of the nozzle needle. An actual signal is ascertained from the lift signal. A deviation signal is ascertained in response to a deviation of the actual signal from the desired signal.06-21-2012
20120158270ACTIVE FUEL MANAGEMENT SYSTEMS AND METHODS FOR VEHICLES WITH A MANUAL TRANSMISSION - A system for a vehicle includes an active fuel management (AFM) module, an expected engine speed determination module, and a disabling module. The AFM module selectively cuts off fuel to at least one cylinder of an engine and maintains valves of the at least one cylinder in closed positions. The expected engine speed determination module determines an expected engine speed based on a position of a shift lever of a manual transmission measured using a position sensor module. The disabling module selectively disables. the AFM module based on the expected engine speed.06-21-2012
20120130622FUEL INJECTION CONTROL DEVICE AND METHOD OF DIESEL ENGINE - A fuel injection control device provided with: a standard fuel injection timing setting unit 05-24-2012
20130184972AIR-FUEL RATIO CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE AND CONTROL METHOD - An air-fuel ratio control apparatus that is applied to an internal combustion engine having an intake passage to which a canister is connected via an evaporative fuel supply passage, and an exhaust passage that is provided with an exhaust gas purifier, includes a first sensor provided upstream of the exhaust gas purifier, a second sensor provided downstream of the exhaust gas purifier, and a controller that corrects a fuel injection amount through feedback on a basis of the air-fuel ratio acquired by the first sensor, modifies a correction coefficient used for feedback correction on a basis of the air-fuel ratio acquired by the second sensor, and has a storage unit that stores the modified correction coefficient. The controller prohibits the modified correction coefficient from being stored into the storage unit if a concentration of fuel in purge gas is equal to or higher than a predetermined criterial concentration.07-18-2013
20100250101Engine - It is an object to provide an engine that makes it possible to constantly detect the number of rotations of a supercharger with a calculation load of an ECU reduced. An engine 09-30-2010
20100250100Mount structure of fuel injection valve and fuel injection system - A combustion chamber side end portion of a fuel injection valve is placed at a location that overlaps with an imaginary plane, which is perpendicular to a center axis of a cylinder and extends along a portion of a wall surface of an intake port where an intake valve protrudes, or is projected out from the imaginary plane toward a combustion chamber. Alternatively, a center of a fuel injecting side end port of the fuel injection valve, which injects fuel into intake air that flows in a branch port branched from the intake port, may be placed on the center axis side of the intake valve in a radial direction of the cylinder. Further alternatively, an upstream side fuel injection valve may inject fuel into intake air that flows in the intake port, and a downstream side fuel injection valve may inject fuel into intake air that flows in the branch port branched from the intake port. Alternatively, an injection quantity of fuel may be controlled for each of fuel injection valves, which injects fuel into intake air that flows in the corresponding branch port branched from the intake port.09-30-2010
20100250099ENGINE CONTROL APPARATUS - There is provided an engine control apparatus that makes it possible that, even in the case where an abnormality occurs in a microcomputer and the operations of the injectors in a series of cylinders are interrupted, there is obtained continuous driving without interruption of the engine, when the microcomputer is restored to normal condition. The microcomputer stores in a backup RAM the injection cylinder and the injection fuel amount at a time when a main fuel injection control means sequentially outputs a drive signal to each of the injectors of the cylinders. After the microcomputer 09-30-2010
20120221227METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an engine includes, but is not limited to acquiring a value of at least one engine operating parameter, using the set of values for determining a predicted value of a combustion parameter indicative of fuel combustion performance within an cylinder, using the values as input of a data-set returning as output a correlated correction value of the combustion parameter, using the correction value and the predicted value for determining an expected value of the combustion parameter, feed-forward controlling an injection of fuel into the engine cylinder targeting the expected value of the combustion parameter, measuring a value of the combustion parameter within the cylinder due to that injection of fuel, using a difference between the expected value and the measured value of the combustion parameter for correcting the correction value of the data-set that is correlated to the set of engine operating parameter values.08-30-2012
20120166067METHOD FOR CONTROLLING A FUEL INJECTOR - A method for determining injected fuel mass delivered from an electromagnetic solenoid-activated fuel injector during a fuel injection event includes determining a sensed injection duration and a maximum injection mass flowrate during the fuel injection event, and determining the injected fuel mass for the fuel injection event based on the sensed injection duration and the maximum injection mass flowrate during the fuel injection event.06-28-2012
20120166068Air-Fuel Ratio Control System and Air-Fuel Ratio Control Method of Internal Combustion Engine - An air-fuel ratio control system of an internal combustion engine comprises a fuel amount determiner for determining a fuel command value. The fuel amount determiner has a feedback control mode in which the fuel amount determiner determines a running state reference coefficient corresponding to a running state detected by a running state detector based on a first correspondence stored in the memory, determines a running state compensation coefficient corresponding to the running state detected by the running state detector based on a second correspondence stored in the memory, determines a feedback compensation coefficient used to cause an air-fuel ratio to reach a value closer to a theoretical air-fuel ratio based on an output of the air-fuel ratio sensor, and determines the fuel command value using a formula including the determined running state reference coefficient, the determined running state compensation coefficient, and the determined feedback compensation coefficient.06-28-2012
20120166066Engine Control System Implementing Lean Burn 6-Stroke Cycle - A control system (06-28-2012
20100332108FUEL VAPOR PRESSURE MEASURING DEVICE - A fuel vapor pressure measuring device is provided, in a fuel supplying system, with a fuel tank for containing fuel, a fuel pump for supplying the fuel in the fuel tank to an injector, a fuel vapor generating section having a nozzle, a vaporizing chamber, and a venturi and vaporizing, in the vaporizing chamber, fuel by ejecting the fuel from the nozzle and causing the fuel to pass through the venturi, a first fuel path for interconnecting the fuel pump and the injector, a second fuel path having one end connected to the fuel pump and the other end connected to the fuel vapor generating section, a pressure sensor for detecting the pressure in the fuel vapor generating section, and an ECU for calculating the pressure of fuel vapor based on the result of detection by the pressure sensor. The fuel vapor generating section is mounted in the fuel tank.12-30-2010
20120215424METHOD FOR THE CONTROL AND REGULATION OF AN INTERNAL COMBUSTION ENGINE - Disclosed is a method for the control and regulation of an internal combustion engine (08-23-2012
20120215423CONTROL DEVICE FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINE EQUIPPED WITH VARIABLE COMPRESSION RATIO MECHANISM - A control device for a multi-cylinder internal combustion engine that is equipped with a variable compression ratio mechanism includes an air-fuel ratio sensor, and a controller that determines whether or not actual mechanical compression ratios in cylinders of the internal combustion engine are uniform. The controller controls the variable compression ratio mechanism by decreasing a target mechanical compression ratio from a current first target mechanical compression ratio to a second target mechanical compression ratio without changing the amount of intake air and a fuel injection amount, and determines that the actual mechanical compression ratios in the cylinders are not uniform when the target mechanical compression ratio is set at the first target mechanical compression ratio if the differences in the output air-fuel ratios from the air-fuel ratio sensor for exhaust gases from the cylinders before and after the control of the variable compression ratio mechanism are not uniform.08-23-2012
20120215422FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINE - A fuel injection system for an internal combustion engine is provided which calculates the quantity of fuel required to bring the pressure in a fuel accumulator into agreement with a target pressure and then control an operation of a high-pressure pump based on the required quantity. Even in the absence of a change in pressure in the accumulator, the system controls the high-pressure pump based on the required quantity. Specifically, the system calculates a feedback fuel quantity required to compensate for a difference between the required quantity and a quantity of the fuel actually supplied to the accumulator, in other words, leans such a quantity difference to correct the required quantity, thus resulting in an enhanced response of the system to control the high-pressure pump to a change in pressure in the accumulator.08-23-2012
20120215421FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINE - A fuel injection system for an internal combustion engine is provided which works to correct the pressure of fuel, as measured by a pressure sensor, using a pressure change corresponding to a change in quantity of the fuel in a common rail within a pressure change compensating time Tp to determine a pump discharge pressure Ptop. This compensates for an error in determining the pump discharge pressure Ptop which arises from propagation of the pressure of fuel from a pump to the pressure sensor. The pressure change compensating time Tp is the sum of a time T1 elapsed between sampling the output of the pressure sensor before a calculation start time when the pump discharge pressure is to start to be calculated and the calculation start time and a time T2 required for the pressure to transmit from the outlet of the pump to the pressure sensor.08-23-2012
20120136555Fuel Injection Control Apparatus For Internal Combustion Engine - There is provided a fuel injection control apparatus for an in-cylinder injection internal combustion engine that limits increases in the amount of discharged PMs and the amount of oil dilution when a demanded amount of injection is changed while divisional injection is being performed. The control apparatus is provided for an internal combustion engine having a fuel injection valve for injecting fuel into a combustion chamber of the internal combustion engine, a fuel pump for feeding fuel to the fuel injection valve by pressuring the fuel, and a fuel storage chamber storing fuel to be supplied to the fuel injection valve. In the engine, divisional injection control including a plurality of fuel injections executed in one cycle is performed. When a demand for making a change in the amount of fuel supplied per cycle occurs, changes in the amount of fuel injection are made according to injection times.05-31-2012
20120136554CONTROL METHOD OF RESTARTING ENGINE IN AN AT ISG AUTOMOBILE - A control method of restarting an engine of an AT ISG vehicle may include a first step of restarting the engine when a state of the vehicle satisfies a restart condition after an idle-stop, a second step of keeping a throttle valve constant at a first critical value or less when a positional value of an acceleration pedal may be equal to a second critical value or more after the first step, and a third step of opening a throttle valve until the positional value of the acceleration pedal detected by the acceleration pedal position sensor and a positional value of the throttle valve detected by a throttle valve position sensor may be matched after a critical time passes, a shifting may be completed after the restarting, or when the acceleration pedal may be pressed down less than at the second critical value after the first step.05-31-2012
20120136556METHOD FOR SELECTING BETWEEN TWO OPERATION MODES IN A DUAL FUEL INTERNAL COMBUSTION ENGINE OF THE DIESEL-TYPE AND A DUAL FUEL INTERNAL COMBUSTION ENGINE OF THE DIESEL-TYPE OPERABLE ACCORDING TO SUCH METHOD - A method of selecting between two operation modes in a dual fuel internal combustion engine of the diesel-type is provided. The engine includes a combustion chamber at least partly delimited by a piston, a first fuel supply for a first fuel, the first fuel supply being located in or at the combustion chamber and/or in or at an inlet port thereof, and a second fuel supply for a second fuel. The engine has two different operation modes, both operation modes including the steps of pre-mixing the first fuel in the combustion chamber and/or in the inlet port, compressing the charge containing the first fuel to conditions that allow auto-ignition of the second fuel, performing a first injection of the second fuel into the combustion chamber to initiate auto-ignition of the second fuel, thereby initiating conditions for combustion of the fuel remaining in the combustion chamber after auto-ignition of the second fuel. The first operation mode is distinguished by homogeneous ignition and combustion of the remaining fuel. The second operation mode is distinguished by pre-mixed flame propagation combustion of the remaining fuel. The method includes adjusting the amount of the second fuel injected in the first injection of the second fuel, and/or the timing of the first injection of the second fuel, so as to control the combustion chamber temperature and pressure after auto-ignition of the second fuel such that selection between the first and second operation modes is achieved. A dual fuel internal combustion engine of the diesel-type is also provided.05-31-2012
20090105931CONTROLLER FOR INTERNAL COMBUSTION ENGINE - A computer determines whether fuel is supplied to the fuel tank while the engine is stopped. When Yes, an injection quantity varying control is performed immediately after the engine is started in which the fuel injection quantity is varied with respect to each cylinder by correcting the fuel injection quantity by use of the air-fuel-ratio learning correction value that is learned in the previous engine operation and a varying correction value which is particular value with respect to each cylinder. The computer determines a combustion condition in each cylinder (for example, a fluctuation in rotational speed in each cylinder), and computes the varying correction value which is appropriate for the supplied fuel. The air-fuel-ratio learning correction value is computed based on the varying correction value.04-23-2009
20120179356CONTROL DEVICE FOR TURBOCHARGED ENGINE - An object of the present invention is to provide a control device for a turbocharged engine capable of accurately estimating the revolution speed of a turbine without using additional components for directly detecting the turbine revolution speed, and by accurately estimating the turbine revolution speed, capable of accurately keeping the turbine revolution speed at an allowed value or below and preventing excessive rotation. The control device for a turbocharged engine includes a turbocharger having a compressor disposed in an intake passage of an engine, and a turbine disposed in an exhaust passage of the engine, a fuel injection amount control unit for controlling a fuel injection amount to the engine according to an operating state of the engine, and a turbine revolution speed estimation unit for determining by calculations an estimated value of a revolution speed of the turbine from the operating state of the engine. When the estimated value of the turbine revolution speed exceeds a predetermined allowed value, the fuel injection control unit controls the fuel injection amount such that the estimated value of the turbine revolution speed becomes equal to or less than the allowed value.07-12-2012
20120253643AIR FUEL RATIO CONTROLLING APPARATUS - An air feed ratio controlling apparatus can include a predictor for predicting an air fuel ratio on the downstream side of a catalyst calculates a predicted air fuel ratio at least based on an actual air fuel ratio from an oxygen sensor and a history of a first correction coefficient. The air fuel ratio controlling apparatus can also include an adaptive model corrector which determines the deviation between the actual air fuel ratio and the predicted air fuel ratio as a prediction error ERPRE, and superposes a second correction coefficient on the first correction coefficient so that the prediction error may be reduced to zero.10-04-2012
20120253642APPARATUS FOR DETECTING IMBALANCE ABNORMALITY IN AIR-FUEL RATIO BETWEEN CYLINDERS IN MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - An apparatus for detecting imbalance abnormality in an air-fuel ratio between cylinders in a multi-cylinder internal combustion engine according to the present invention increases a fuel injection quantity to a predetermined target cylinder to detect imbalance abnormality in an air-fuel ratio between cylinders at least based upon a rotation variation of the target cylinder after increasing the fuel injection quantity. The increase in the fuel injection quantity is carried out in the middle of performing the post-fuel-cut rich control. Since timing of the post-fuel cut rich control is used to increase the fuel injection quantity, the exhaust emission deterioration due to abnormality detection execution can be prevented as much as possible.10-04-2012
20120316756CONTROL SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - A control system for a direct-injection four-stroke internal combustion engine having at least one cylinder, an intake passage supplying air to the cylinder, and an exhaust passage removing exhaust gas from the cylinder, the control system including a mass air flow meter configured to detect a mass air flow upstream of the cylinder and a control unit. The control unit is configured to detect an intake air density in the cylinder, calculate an in-cylinder trapped intake air amount based on a cylinder volume and the detected intake air density, and estimate a difference between the intake air amount detected by the mass air flow meter and the in-cylinder trapped intake air amount, the estimated difference being an estimated scavenging amount representing a fresh air blowby amount passing from the intake passage into the exhaust passage.12-13-2012
20120226430CONTROL DEVICE FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - A control device for a multi-cylinder internal combustion engine executes feedback control such that an air-fuel ratio detected by an air-fuel ratio detecting unit becomes a target air-fuel ratio, carries out external EGR, and, when an abnormal deviation that an air-fuel ratio of at least any one of cylinders deviates from the target air-fuel ratio has occurred during the feedback control, detects the abnormal deviation and an abnormal cylinder. When the abnormal deviation has been detected during feedback control and external EGR, the control device corrects the target air-fuel ratio to compensate for a detection error of the air-fuel ratio detecting unit due to the influence of specific components of exhaust gas. The control device changes the correction mode on the basis of whether the abnormal cylinder causes more intensive gas flow or equal or less intensive gas flow against the air-fuel ratio detecting unit than the other cylinders.09-06-2012
20120226429METHOD FOR CONTROLLING A DIESEL ENGINE SYSTEM - A method for controlling a diesel engine is disclosed in which the diesel engine is controlled to produce less soot when the operating state of an associated emission control device such as a diesel particulate filter or the amount of a contaminant such as fuel or soot in the oil used to lubricate the diesel engine exceed predetermined respective thresholds.09-06-2012
20120259533VEHICLE CALIBRATION USING DATA COLLECTED DURING NORMAL OPERATING CONDITIONS - Systems and methods for optimizing the performance of a vehicle under normal operating conditions. A vehicle system adjusts one or more vehicle operating parameters in a closed-loop in response to data received from sensors. A portable vehicle communication interface module is selectively attached to the vehicle without inhibiting normal operation of the vehicle. When connected to the vehicle, the vehicle communication interface module records the adjustments made by the vehicle system in closed-loop operation. These recorded values are then used to update calibration information that the vehicle system uses as default values.10-11-2012
20120259532CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An object of this invention is, even when executing WGV control, to stably control an air-fuel ratio in parallel therewith. An engine includes a supercharger, a waste gate valve (WGV) and the like. An ECU calculates a wall-surface fuel adherence amount that is an amount of fuel adhering to a wall surface of an intake port based on a plurality of parameters including a degree of opening of the WGV or an indicator corresponding to the degree of opening. The calculated wall-surface fuel adherence amount is reflected in a fuel injection amount. Thus, even when executing WGV control, a state of a blowback amount of exhaust gas that varies with the degree of opening of the WGV can be reflected in the wall-surface fuel adherence amount, in other words, the fuel injection amount, and thus a disturbance of the air-fuel ratio or the like caused by changes in the blowback amount can be suppressed.10-11-2012
20120265425ENGINE CONTROL PROGRAM, METHOD AND APPARATUS - Setting values of a fuel injection quantity for an engine having an exhaust gas recirculator (EGR) and variable nozzle turbo (VNT), and an engine speed, and measurement values of a manifold air pressure (MAP) and a mass air flow (MAF) are obtained. According to a combination of the reference values of an EGR valve opening degree and a VNT nozzle opening degree, which correspond to the setting values, or a combination of a control value of the EGR valve opening degree by a MAF controller and a control value of the VNT nozzle opening degree by a MAP controller, which correspond to the measurement values, a mode that the MAF and MAP controllers, a first interference compensator from the MAF controller to the MAP controller and a second interference compensator for the reverse direction are enabled and a mode that the MAF or MAP controller is enable are dynamically switched.10-18-2012
20120265423FUEL INJECTION CONTROL SYSTEM - A fuel injection control system is provided. The fuel injection control system comprises a first injector and a second injector positioned upstream of the first injector; a memory section which contains a map for defining a correspondence between a running state of an engine and first and second fuel injection ratios; a fuel injection ratio setting section for setting the first fuel injection ratio as a first set value and the second fuel injection ratio as a second set value; and a fuel injection ratio compensation section for making compensation such that the first set value is greater than a value of the first fuel injection ratio derived from the map, when a condition in which the second fuel injection ratio read out from the map is greater in magnitude than a predetermined determination criterion is met.10-18-2012
20120265424METHOD FOR THE OPEN-LOOP CONTROL AND CLOSED-LOOP CONTROL OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for the open-loop control and the closed-loop control of an internal combustion engine (10-18-2012
20110046866ENGINE CONTROL RESPONSIVE TO VARYING AMOUNTS OF ALCOHOL IN FUEL - Various systems and methods are described for operating an engine in a vehicle in response to fuel having varying amounts of alcohol. One example method comprises delivering fuel to the engine, limiting engine speed during vehicle operation to a maximum permitted engine speed, the maximum permitted engine speed responsive to the amount of alcohol in the fuel.02-24-2011
20120330535CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - Disclosed is an internal-combustion engine controller capable of improving emission characteristics at a start of an internal-combustion engine. When injection during an exhaust stroke is controlled in a port-injection engine, the engine controller ECU performs the first fuel injection during t12-27-2012
20120323465METHODS AND SYSTEMS FOR EXHAUST GAS RECIRCULATION COOLER REGENERATION - Various methods and systems are provided for regenerating an exhaust gas recirculation cooler. One example method includes, initiating an EGR cooler regeneration mode, wherein the EGR cooler regeneration mode comprises changing a fuel distribution of a donor cylinder group relative to a non-donor cylinder group of an engine, and increasing at least one of engine speed or load of the engine.12-20-2012
20120271531Method and System for Pre-Ignition Control - Methods and systems are provided to address engine pre-ignition. One or more cylinders are alternately rich and lean operated for a duration to reduce engine thermal loading while maintaining an exhaust air-to-fuel ratio around stoichiometry.10-25-2012
20120271532METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine. The internal combustion engine has at least one cylinder, to which are connected an intake manifold having an air mass sensor, an exhaust pipe having a λ-sensor and an exhaust gas recirculation line having an exhaust gas recirculation valve. The air mass sensor generates an air mass sensor signal. The λ-sensor generates a λ-sensor signal. The exhaust gas recirculation valve is adjusted by a control signal. A setpoint injection quantity is formed and the control signal of the exhaust gas recirculation valve is formed as a function of the air mass sensor signal. An air mass replacement signal for the air mass sensor signal is formed as a function of the λ-sensor signal and the setpoint injection quantity. In the case of a faulty air mass sensor signal, the control signal is formed as a function of the air mass replacement signal.10-25-2012
20120323466INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - An inter-cylinder air-fuel ratio imbalance determination apparatus (determination apparatus) according to the present invention obtains, based on the output value of the air-fuel ratio sensor, an imbalance determination parameter which becomes larger as an air-fuel ratio fluctuation of an exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, during a parameter obtaining period. The determination apparatus energizes the heater of the air-fuel ratio sensor in such a manner that a temperature of the air-fuel ratio element during the parameter obtaining period is higher than a temperature of the air-fuel ratio element during a period other than the parameter obtaining period. Accordingly, the imbalance determination parameter is obtained while the responsiveness of the air-fuel ratio sensor is high, and thus, the inter-cylinder air-fuel-ratio imbalance determination having a high accuracy can be made.12-20-2012
20120323467FUEL INJECTION AMOUNT CALCULATION METHOD AND FUEL INJECTION CONTROLLING APPARATUS - A fuel injection amount calculation method calculates a fuel injection amount to an internal combustion engine of a vehicle. The method can include calculating a relative intake pressure which is a difference between an intake pressure peak of intake air upon intake starting of a cylinder of the internal combustion engine and an intake pressure bottom of the intake air upon intake ending. The method can also include calculating the fuel injection amount based on the relative intake pressure.12-20-2012
20110231082Fuel Supply Control Device For Internal Combustion Engine and Fuel Vapor Processing Method - The present invention relates to a fuel supply control device for an internal combustion engine and a fuel vapor processing method. In the fuel supply control device that calculates a manipulated variable of a fuel pump such that a fuel pressure detected by a fuel pressure sensor is brought close to a target fuel pressure, a determination whether a fuel vapor is generated is made based on a detection value of the fuel pressure and the manipulated variable in a fuel pump, or the determination is made based on an amplitude of the detection value of the fuel pressure and an average fuel pressure in a fuel supply piping. During the fuel vapor generation, the target fuel pressure is corrected to be a higher value to increase the fuel pressure, thereby compressing and removing the fuel vapor. Therefore, in a fuel supply system, the fuel vapor generation can be detected at low cost to suppress the fuel vapor generation.09-22-2011
20110231081Control Method of Internal Combustion Engine - The invention provides a method for preferably controlling an internal combustion engine by precisely estimating a current value of a temperature of an exhaust device of an internal combustion engine provided with a variable valve, an exhaust turbo supercharger and the like, and controlling an affector of a temperature of an exhaust gas on the basis of a difference between a reference value of the exhaust device temperature and the current value of the exhaust device temperature. The method computes a temperature of an exhaust gas on the basis of a rotating speed, a charging efficiency, an ignition timing, an equivalent ratio, an external EGR rate, an exhaust valve opening timing, and a supercharging pressure, estimates a temperature of an exhaust device on the basis of the exhaust gas temperature, an amount of an intake air, a temperature of a fluid around the exhaust device and a flow rate around the exhaust device, and transiently corrects at least one of the ignition timing, the equivalent ratio, the external EGR rate, and the exhaust valve opening timing, on the basis of the estimation value and the reference value.09-22-2011
20110238283METHOD AND APPARATUS FOR REDUCING UNCONTROLLED COMBUSTION IN AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for reducing uncontrolled combustions in an internal combustion engine, which occur independently of the ignition by a spark plug, wherein uncontrolled combustions are detected in the internal combustion engine (09-29-2011
20120130621Reformate Control via Accelerometer - Engine surge includes oscillations in engine torque resulting in bucking or jerking motion of a vehicle that may degrade driver experience. The present application relates to increasing reformate entering an example engine cylinder in response to engine surge.05-24-2012
20120277979AIR/FUEL RATIO VARIATION ABNORMALITY DETECTION APPARATUS, AND ABNORMALITY DETECTION METHOD - In an abnormality detection apparatus and an abnormality detection method for a construction in which each of cylinders is provided with a plurality of fuel injection valves, if it is discerned that a cause of the inter-cylinder variation abnormality exists in one of the fuel injection valves, an air/fuel ratio fluctuation parameter as an index value that represents the degree of the abnormality is calculated by normalizing the air/fuel ratio fluctuation parameter regarding that fuel injection valve on the basis of the injection proportion used when the parameter is measured.11-01-2012
20120277981CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - A control device for an internal combustion engine includes an engine and a control unit . The engine can be driven by switching between CNG fuel and liquid fuel. The control unit switches an air fuel ratio, in case of switching fuel to be supplied to the engine between the CNG fuel and the liquid fuel, so that torque fluctuation of the engine is unchanged before and after switching the fuel.11-01-2012
20120277980INTER-CYLINDER AIR-FUEL RATIO IMBALANCE DETERMINATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - An inter-cylinder air-fuel ratio imbalance determination apparatus that obtains, based on an output value Vabyfs of an air-fuel ratio sensor, an air-fuel ratio fluctuation indicating amount (AFD) which becomes larger as an air-fuel ratio fluctuation of an exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, during a parameter obtaining period. The determination apparatus estimates an air-fuel ratio sensor element temperature (Temps) having a strong relation with responsiveness of the air-fuel ratio sensor during the parameter obtaining period, and obtains a corrected air-fuel ratio fluctuation indicating amount by correcting the AFD based on the estimated Temps. The determination apparatus adopts the corrected air-fuel ratio fluctuation indicating amount as the imbalance determination parameter X, and determines whether or not an inter-cylinder air-fuel-ratio imbalance state has been occurring based on a comparison between the imbalance determination parameter X and the imbalance determination threshold Xth.11-01-2012
20110251780FUEL CONSERVATION SYSTEMS AND METHODS - Methods and systems are described for conserving fuel used by an engine. In some embodiments a control module processes a user-provided input, as a first function, into a second function. The second function can be used to direct the engine with a directive output power. The directive output power may have regions equal to, greater than, and/or less than what the power output would be if the engine were controlled using the user-provided input.10-13-2011
20120330534ENHANCED EFFICIENCY AND POLLUTANT CONTROL BY MULTI-VARIABLE ENGINE OPERATION CONTROL - Based on one or more monitored operation parameters of an internal combustion engine, a set of engine operation conditions necessary to provide combustion stability in a combustion volume of the engine, optimized fuel efficiency, and minimized production of pollutants such as nitrogen oxides, carbon monoxide, and unburned hydrocarbons can be determined. The new set of engine operation conditions can be dynamically implemented in response to changing engine loads and changing engine speeds to maintain a combustion mixture and combustion conditions within a combustion chamber of the engine constrained flammability limits, pollutant generation rates, and fuel efficiency considerations. Related articles, systems, and methods are described.12-27-2012
20120330533APPARATUS FOR AND METHOD OF DETECTING ABNORMAL AIR-FUEL RATIO VARIATION AMONG CYLINDERS OF MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - An apparatus for detecting an abnormal air-fuel ratio variation among cylinders of a multi-cylinder internal combustion engine includes: a detecting unit detecting the abnormal air-fuel ratio variation on the basis of output fluctuations of at least one predetermined target cylinder when fuel injection amount changing control for changing a fuel injection amount of the target cylinder by a predetermined amount is executed; and an air-fuel ratio control unit causing an air-fuel ratio detected on the basis of a signal output from an air-fuel ratio sensor provided in an exhaust passage to follow a predetermined target air-fuel ratio. When the fuel injection amount changing control is executed, a target air-fuel ratio in the air-fuel ratio feedback control is shifted from the predetermined target air-fuel ratio by an amount corresponding to an amount of change of the fuel injection amount of the target cylinder in the fuel injection amount changing control.12-27-2012
20120330536METHOD AND SYSTEM FOR PRE-IGNITION CONTROL - Methods and systems are provided for mitigating engine pre-ignition based on a feed-forward likelihood of pre-ignition and feedback from a pre-ignition event. In response to an indication of pre-ignition, a cylinder may be enriched while an engine load is limited. The enrichment may be followed by an enleanment to restore exhaust catalyst feed-gas oxygen levels. The mitigating steps may be adjusted based on engine operating conditions, a pre-ignition count, as well as the nature of the pre-ignition.12-27-2012
20110307163CONTROLLER OF INTERNAL COMBUSTION ENGINE - A controller performs compression self-ignition combustion control for combusting a mixture gas by injecting fuel into a cylinder in a negative valve overlapping period (NVO period), in which both of an exhaust valve and an intake valve are closed, and by causing self-ignition of the mixture gas using compression in a compression stroke. If knocking is detected during the above control, the controller performs knock suppression control for correcting a fuel injection quantity in the NVO period to suppress the knocking. If a pressure increase rate of cylinder pressure during the combustion is lower than a threshold value, the controller performs increase correction of the fuel injection quantity in the NVO period. If the pressure increase rate is equal to or higher than the threshold value, the controller performs decrease correction of the fuel injection quantity in the NVO period.12-15-2011
20110320107Fuel Injection Control Device for Engine - A fuel injection control device for an engine executes a split injection constructed by a fixed injection and a variable injection. A required injection amount of the fixed injection is set in a low range. A required injection amount of the variable injection is set in a high range. An injection amount in the high range is larger than that of the low range. The required injection amount of the variable injection is changed within the high range while the required injection amount of the fixed injection is fixed when a load of the engine is varied while the split injection is performed. An injection control characteristic is corrected based on an actual air-fuel ratio detected before the load is varied and an actual air-fuel ratio detected after the load is varied.12-29-2011
20110320106AIR-FUEL RATIO CONTROL APPARATUS AND AIR-FUEL RATIO CONTROL METHOD FOR INTERNAL-COMBUSTION ENGINE - An air-fuel ratio control apparatus for an internal-combustion engine includes an air-fuel-ratio sensor, a control-input calculator, an air-fuel-ratio controller, and a gain calculator. The air-fuel-ratio sensor is disposed in an exhaust channel in the internal-combustion engine and is configured to detect an air-fuel ratio in exhaust gas. The control-input calculator is configured to calculate a control input in accordance with an output value of the air-fuel-ratio sensor. The air-fuel-ratio controller is configured to perform a feedback control using the control input such that the output value of the air-fuel-ratio sensor reaches a target value. The gain calculator is configured to calculate a gain in accordance with the output value when the output value is leaner than the target value. The gain is to be used in calculating the control input.12-29-2011
20100198486METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for operating an internal combustion engine, which can be operated with fuels and fuel mixtures of said fuels, said fuels differing from each other in the air quantity they require for a stoichiometric combustion. A fuel quantity to be supplied to the internal combustion engine is corrected via a mixture adaptation and a fuel adaptation, the mixture adaptation and the fuel adaptation being based on a lambda control and a fuel quantity contained in the fuel reservoir of the internal combustion engine prior to refueling and a fuel quantity supplied to the reservoir being determined. The method is characterized by using the change of the fuel adaptation after refueling towards a fuel/air mixture having a higher or a lower fuel percentage to extrapolate the supplied fuel or the supplied fuel mixture and the fuel quantity present in the reservoir and the knowledge of the nature of the fuel or the fuel mixture supplied to the reservoir are used to calculate the fuel mixture ration in the reservoir after refueling. The method according to the invention allows determination of the fuel mixture ratio in the reservoir of internal combustion engines which can be operated with different fuels.08-05-2010
20130013171AUTOMOTIVE FUEL SYSTEM - A PCV circuit for an internal combustion engine is modified to deliver the PCV fluid to an atomization chamber which also receives fuel from an electronic fuel injector tapped into the main vehicle fuel supply. The fuel from the injector is thoroughly vaporized in and/or immediately downstream of the chamber and conveyed to the vehicle intake manifold. In one embodiment, a switch cuts off operation of the fuel injector at high load/high throttle setting conditions. In another embodiment, injected fuel is measured with increased engine load. The injector operates at a constant frequency with a variable ON time.01-10-2013
20130013173FUEL SUPPLY SYSTEM FOR INTERNAL COMBUSTION ENGINE - An engine includes a normal fuel tank, fuel gas tank, an in-tank injection valve and a fuel gas supply valve. During operation of the engine, in a state where the fuel gas supply valve is closed, a fuel is injected into the fuel gas tank through the in-tank injection valve to generate a fuel gas by vaporizing the fuel. The fuel gas is stored in the fuel gas tank and is maintained in the gas phase due to the natural decompression even after the engine is stopped. To start the engine, the fuel gas supply valve is opened to supply the fuel gas in the fuel gas tank to a surge tank. Thus, compared with the case where the fuel gas is generated at the start of the engine, the fuel gas can be quickly supplied into the cylinder, so that the ability to start the engine is improved.01-10-2013
20130013172METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases.01-10-2013
20120150418APPARATUS AND METHOD FOR CONTROLLING FUEL INJECTION IN A BI-FUEL VEHICLE RUNNING ON TWO FUELS, I.E. GASOLINE AND LPG - A method of controlling fuel injection of a bi-fuel vehicle running on gasoline and liquefied petroleum gas (LPG), and more particularly, a method of controlling fuel injection of a bi-fuel vehicle having an engine running on gasoline and LPG, capable of simultaneously controlling supply systems and injectors of fuels and switching the fuels in response to a fuel switch request based on an injection ratio and an injection time of each fuel is provided. Thus, fuels may be switched stably and efficiently, output reduction and exhaust gas increase due to deviation of an air-fuel ratio while switching fuels may be prevented, and fuels may be appropriately switched. Furthermore, mechanical stress generated while switching fuels may be minimized and stable driving may be provided. Accordingly, the reliability of a bi-fuel vehicle simultaneously using gasoline and LPG may be improved and the competitiveness of bi-fuel vehicle products may also be improved.06-14-2012
20130024095ENGINE CONTROL METHOD - Embodiments of the present invention include an engine control method for controlling an engine having an accessory. In the method, a relationship between a torque of the accessory and a controlled variable corresponding to each rotational speed of the engine is stored in advance. An estimated value of the controlled variable is calculated based on a calculated value of the torque of the accessory and the engine rotational speed by reference to the said relationship. A command value of the controlled variable is calculated based on at least one of the engine rotational speed, opening of a throttle, opening of an accelerator and an air supply pressure. A calculated difference is determined by comparing the estimated value of the controlled variable and the command value of the controlled variable.01-24-2013
20130024098Method for Adapting the Actual Injection Quantity, Injection Device and Internal Combustion Engine - A method for adapting the actual injection quantity of an injector of an internal combustion engine to the target injection quantity, an injection device for an internal combustion engine, and an internal combustion engine are provided. In the method, the crankshaft acceleration achieved by a test injection pulse is detected in the rotational speed signal of the internal combustion engine and on this basis the injected fuel quantity of the injector is determined. On the basis of the determined injected fuel quantity, the actuating data of the injector of the internal combustion engine is corrected. To this end, the injected fuel quantity of the injector is detected and corrected by a test injection pulse during the normal fired operational state of the internal combustion engine.01-24-2013
20130024097COMBUSTION CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - In an internal combustion engine (engine) in which premixed combustion and diffusion combustion are carried out in a combustion chamber, the premixed combustion and the diffusion combustion are separated by carrying out a control to limit the minimum value of the heat generation rate between the combustion centroid of the premixed combustion and the combustion centroid of the diffusion combustion, or carrying out a control to adjust the interval between a first injection for the premixed combustion and a second injection for the diffusion combustion. In this manner, the combustion form in the combustion chamber is made separated combustion in which the premixed combustion and the diffusion combustion are separated, and therefore ignition delay in the earlier premixed combustion does not influence the later diffusion combustion, thus making it possible to use the respective advantages of the premixed combustion and the diffusion combustion. Accordingly, it is possible to achieve a reduction of emissions and combustion stability also during a transient operation or during use of fuel that has a low cetane rating.01-24-2013
20130024096CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - The present invention has an object to enable a torque as required to be realized without being influenced by an operation state of an IN-VVT, which is a variable valve timing mechanism which changes a valve timing of an intake valve. For this purpose, a control device for an internal combustion engine provided by the present invention stores data that defines a relationship between an air quantity and a torque in an MBT in association with the operation state of the IN-VVT, and calculates a target air quantity for realizing a required torque based on the data. The control device calculates an actual air quantity which is actually realized by an operation of a throttle when operating the throttle to realize the target air quantity. Further, the control device for an internal combustion engine provided by the present invention stores data that defines a relationship of the air quantity and an ignition timing in a case in which the IN-VVT is in a maximum retardation position, and calculates a basic ignition timing from the actual air quantity based on the data. Further, the control device for an internal combustion engine provided by the present invention determines an advance correction amount of the ignition timing from the operation state of the IN-VVT. The control device determines a final ignition timing from the basic ignition timing and the advance correction amount.01-24-2013
20130024094METHODS FOR CONTROLLING COMBUSTION OF BLENDED BIOFUELS - A closed-loop control algorithm that reduces the increases in nitrogen oxides (NO01-24-2013
20130024093APPARATUS FOR AND METHOD OF CONTROLLING INTERNAL COMBUSTION ENGINE - A control apparatus for an internal combustion engine where the inside of a combustion chamber is divided into a layer of internal EGR gas and a combustible layer to perform stratified combustion. In a port-injected engine equipped with first and second intake valves, the opening timing of the first intake valve is set before a top dead center (TDC) and the opening timing of the second intake valve is set after the TDC, and the closing timings of the first intake valve and the second intake valve are set after a bottom dead center. Then, fuel injection toward the first intake valve is started after the EGR gas, which was blown back to the intake port upstream of the first intake valve, is drawn into the combustion chamber after the top dead center.01-24-2013
20100088008INTERNAL COMBUSTION ENGINE CONTROL DEVICE AND INTERNAL COMBUSTION ENGINE CONTROL SYSTEM - An internal combustion engine control device has a torque increase amount obtaining section that obtains engine rotation speed fluctuation amount (output torque increase amount) caused with small quantity injection as a torque increase amount sensing value, an adaptation value setting section that variably sets an adaptation value used for engine control in accordance with a fuel property determined based on the torque increase amount sensing value, a confirmation injection control section that performs the small quantity injection again while the engine control is performed based on the set adaptation value, and an accuracy determination section that determines accuracy of fuel property determination result or the adaptation value based on whether a confirmation sensing value, which is the engine rotation speed fluctuation amount obtained when the confirmation injection control section performs the small quantity injection, is outside a predetermined range.04-08-2010
20110264357CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - A control apparatus for an internal combustion engine includes: a fuel property sensor which is provided between a fuel tank and a delivery pipe and which detects a component ratio of fuel; a fuel property value calculator that calculates an injector fuel property value for each cylinder using the component ratio detected by the fuel property sensor a period of time ago, which is equal to an amount of time required for the fuel to travel from the fuel property sensor to each fuel injector, as a value corresponding to the present component ratio of the fuel near the corresponding injector; and an engine-restart-time fuel injection amount calculator that calculates a fuel injection amount for each cylinder based on an engine-off duration in a case where the internal combustion engine is restarted after the internal combustion engine is stopped when the injector fuel property value varies from cylinder to cylinder.10-27-2011
20080221780Diesel Engine Control Device - A control device is provided that controls the injection quantity and injection timing of fuel injected into the cylinder of a diesel engine, in which are provided two control modes of: a normal injection mode in which the injection quantity and injection timing are controlled so that the injected fuel ignites near compression top dead center during an injection period; and a premixed injection mode in which the injection quantity and injection timing are controlled so that fuel injection is completed before compression top dead center and the injected fuel ignites near compression top dead center after a premixing period, and target values of control parameters (pilot injection timing, and the like) are set in advance separately for each control mode, the control device comprising change means for gradually changing target values V09-11-2008
20120253641METHOD AND A CONTROL DEVICE FOR CONTROLLING AN ENGINE - A method for controlling an engine in either a first mode in which the engine is fuelled by a first fuel, or in a second mode in which the engine is fuelled by a mixture of the first fuel and a second fuel, the method comprising the steps of programming the engine to operate initially in the first mode, repeatedly sensing a plurality of first variables and obtaining a measured value for each sensed first variable, and emitting a first input signal dependent on the measured value of each sensed first variable, causing a first output signal, comprising a plurality of injector control signals, to be emitted in dependence on the first input signals for controlling the amount of the first fuel supplied to the engine, switching the mode of operation to the second mode, selecting one or more of the injector control signals to produce a first modified signal, which determines the amount of first fuel supplied to the engine and generating a second calculated signal, which determines the amount of second fuel supplied to the engine.10-04-2012
20130138329FUEL INJECTION AMOUNT CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - A fuel injection amount control apparatus of an embodiment according to the present invention comprises an air-fuel ratio sensor 05-30-2013
20130090838FUELING STRATEGY FOR CONTROLLED-AUTOIGNITION ENGINES - Methods and systems for controlling combustion performance of an engine during recompression HCCI combustion are provided. The method includes regulating a valve actuation timing and a fuel injection timing to cause a combustion phasing of at least one cylinder of the engine to approach a target combustion phasing, and estimating current combustion state information based on the combustion phasing. The current combustion state information includes at least one of a temperature, a pressure, and a pre-combustion charge composition associated with the at least one cylinder. The method further includes determining a target fuel injection amount, and determining whether the target fuel injection amount would require actuator settings that violate predetermined constraints in order to cause the combustion phasing to approach the target combustion phasing. A fuel injection amount is adjusted when the target fuel injection amount would require actuator settings that violate the predetermined constraints.04-11-2013
20130090837FUEL GOVERNOR FOR CONTROLLED AUTOIGNITION ENGINES - Methods and systems for controlling combustion performance of an engine are provided. A desired fuel quantity for a first combustion cycle is determined. One or more engine actuator settings are identified that would be required during a subsequent combustion cycle to cause the engine to approach a target combustion phasing. If the identified actuator settings are within a defined acceptable operating range, the desired fuel quantity is injected during the first combustion cycle. If not, an attenuated fuel quantity is determined and the attenuated fuel quantity is injected during the first combustion cycle.04-11-2013
20130096805COMBUSTION DIAGNOSIS DEVICE FOR INTERNAL COMBUSTION ENGINE - A combustion diagnosis device for a diesel engine having a plurality of cylinders, including an engine speed sensor for detecting a rotational speed of each cylinder, an injection correction amount calculation unit for calculating an amount of correction for fuel injection of each cylinder in accordance with the engine speed sensor, a rotational fluctuation calculation unit for calculating a rotational fluctuation of each cylinder in accordance with the engine speed sensor, and a combustion state determination unit for determining a combustion state of a determination-target cylinder in accordance with the rotational fluctuation when the correction amount calculated by the injection correction amount calculation unit reaches an upper limit threshold value.04-18-2013
20130096804FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINE - The present invention is directed to fuel injection devices for internal combustion engines. An object of the present invention is to provide a fuel injection device for an internal combustion engine capable of identifying a non-contributing fuel quantity when port injection and cylinder injection are simultaneously performed. If an explosion count and a coolant temperature for any cycle can be acquired, they can be applied to a first map and a second map to thereby find non-contributing fuel for 100% port injection and non-contributing fuel for 100% cylinder injection, respectively. Each of these found values of the non-contributing fuel is multiplied by a corresponding injection share ratio during injection of the non-contributing fuel to thereby find non-contributing fuel that takes into account the injection share ratio. Finally, these values are added up to arrive at a non-contributing fuel requirement value.04-18-2013
20130179051AIR-FUEL RATIO CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - An embodiment (control apparatus) of an air-fuel ratio control apparatus according to the present invention determines, based on an output value Voxs of a downstream air-fuel ratio sensor 07-11-2013
20130179050Gaseous-Fuelled Stoichiometric Compression Ignition Internal Combustion Engine - In a gaseous-fuelled stoichiometric compression ignition internal combustion engine, a pilot fuel is injected directly into the combustion chamber to help initiate a multi-point ignition. The engine provides performance improvements approaching those of high pressure direct injection engines but with less complexity because the gaseous fuel is introduced into the intake air subsystem at relatively low pressure and as a result of the stoichiometric combustion, the low oxygen content in the combustion products exiting the combustion chamber allows the use of a three-way catalyst instead of other after treatment arrangements normally associated with conventional compression ignition engines that require the addition of a reductant.07-11-2013
20130124069METHOD FOR DETERMINING A FILLING DIFFERENCE IN CYLINDERS OF AN INTERNAL COMBUSTION ENGINE, OPERATING METHOD, AND CALCULATION UNIT - In a method for determining a filling difference between at least two cylinders of an internal combustion engine, e.g., an Otto-cycle engine, a power output parameter contribution made available by the respective cylinder to a total power output parameter of the internal combustion engine is ascertained for each of the at least two cylinders for different fuel quantities, and an air inhomogeneity between the at least two cylinders is ascertained on the basis of the power output parameter contributions, ascertained for the different fuel quantities, of the at least two cylinders.05-16-2013
20130124068APPARENT PLUMBING VOLUME OF AIR INTAKE AND FRESH AIRFLOW VALUE DETERMINATION - An apparatus for fresh airflow determination includes an operating conditions module that interprets a MAF value, a current operating condition and a charge flow value. The apparatus further includes a volume estimation module that determines an apparent plumbing volume of an air intake assembly in response to the MAF value, the current operating condition and the charge flow value. The apparatus further includes a volume reporting module that provides the apparent plumbing volume.05-16-2013
20130131963Engine Idle Speed and Turbocharger Speed Control - Various methods are described for controlling engine operation for an engine having a turbocharger and direction injection. One example method includes performing at least a first and second injection during a cylinder cycle, the first injection generating a lean combustion and the second injection injected after combustion such that it exits the cylinder unburned into the exhaust upstream of a turbine of the turbocharger; and adjusting at least the first injection based on engine speed, where the at least first and second injection are performed responsive to turbocharger speed.05-23-2013
20130131962AIR-FUEL RATIO CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An air-fuel ratio control apparatus for an internal combustion engine includes an air-fuel ratio detector, a fuel amount controller, an operational state parameter acquiring device, an extractor, a failure determination device, a variation state parameter calculator, and a determination stopping device. The operational state parameter acquiring device is configured to acquire at least one operational state parameter. The failure determination device is configured to execute failure determination of determining a failure in an air-fuel ratio control system of the internal combustion engine based on a specific frequency component extracted by the extractor. The variation state parameter calculator is configured to calculate a variation state parameter. The determination stopping device is configured to stop the failure determination if the variation state parameter calculated by the variation state parameter calculator is equal to or larger than a predetermined threshold value.05-23-2013
20130144512METHOD OF INJECTING FUEL INTO AN ENGINE - A method of operation of a dual fluid fuel injection system arranged to supply fuel to a cylinder of an internal combustion engine, the dual fluid fuel injection system being controllable to effect fuel metering events and fuel delivery events. The method comprises operating the dual fluid fuel injection system so as to have at least one fuel delivery event during each engine cycle and to have fewer than one fuel metering event, on average, per engine cycle. An electronic control unit for implementing the method is also described. The method and control unit allow dynamic range of a fuel metering injector, where included within the dual fluid fuel injection system, to be extended.06-06-2013
20130144510FUEL INJECTION AMOUNT CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - A fuel injection amount control apparatus includes an air-fuel ratio sensor which is disposed between an exhaust gas merging portion HK and an upstream catalyst. The control apparatus performs a feedback correction on an amount of fuel to be injected by the fuel injection valve in such a manner that an air-fuel ratio represented by an output value of an upstream air-fuel ratio sensor becomes equal to a target air-fuel ratio which is set at stoichiometric air-fuel ratio. The control apparatus obtains an air-fuel ratio imbalance indicating value, which becomes larger as a difference in air-fuel ratio of each of the mixtures supplied to each of the combustion chambers among the cylinders becomes larger, and performs an increasing correction to the amount of fuel to be injected by the injection valve in such a manner that an air-fuel ratio becomes a richer air-fuel ratio than the stoichiometric air-fuel ratio as the obtained air-fuel ratio imbalance indicating value becomes larger.06-06-2013
20100017100FUEL INJECTION CONTROLLER - In a fuel injection controller for a fuel injection system that executes an injection quantity learning operation for a fuel injection valve, a drive signal is outputted when the diagnosis condition is satisfied. An actual injection quantity of fuel that is actually injected by the fuel injection valve is computed. The fuel injection controller computes a correction amount based on a difference between the actual injection quantity and the command injection quantity. The fuel injection controller determines whether the correction amount exceeds a limit value. An injection deviation amount between the command injection quantity and the actual injection quantity of fuel, which is injected based on the drive signal corrected by the limit value, is computed when the correction amount exceeds the limit value.01-21-2010
20130151122METHOD OF CONTROLLING COMBUSTION OF DIESEL ENGINE - A method of controlling combustion of a diesel engine may include a vibration measuring step of measuring engine vibrations, a measurement region setting step of setting a range where an LPP (location of peak pressure) is predicted from measured vibration data, a frequency transforming step of transforming a vibration signal to a frequency response function, a frequency integrating step of integrating the transformed frequency response function, an LPP detecting step of selecting a location of peak pressure from integrated frequency response function, an estimated value determining step of selecting LPP offset and SOC (start of combustion) offset by using the detected LPP, an error determining step of determining LPP value error and SOC value error by comparing the estimated LPP value and the estimated SOC value with a target LPP value and a target SOC value, and a combustion correcting step of correcting and controlling combustion by the determined errors.06-13-2013
20130151119METHOD AND SYSTEM FOR REDUCING SOOT FORMED BY AN ENGINE - An engine system and method for reducing soot produced by an engine is disclosed. In one example, during purging of stored fuel vapors, a number of fuel injections to a cylinder during a cylinder cycle are maximized to reduce soot formation. The system and method may reduce soot formation within an engine.06-13-2013
20130151120METHOD OF LEARNING ETHANOL CONCENTRATION FOR FUEL FLEXIBLE VEHICLE - A method of learning an ethanol concentration for an a fuel flexible vehicle (FFV) enables an ethanol concentration to be learned even when an oxygen sensor of FFV that is not equipped with an ethanol sensor is malfunctioning, thereby suppressing the occurrence of trouble and stalling of an engine and allowing the stable operation of the engine. Accordingly, the method improves the reliability of vehicles and increases the merchantable quality of vehicles.06-13-2013
20130151121METHOD OF CONTROLLING STARTING OF ENGINE FOR FFV - In a fuel flexible vehicle (FFV) which is not equipped with an ethanol sensor, even in a state in which it is difficult to start an engine such as a situation in which the concentration of ethanol was not correctly determined or a situation in which a fuel with a different composition from the previously refueled fuel is pumped into the FFV, the starting of the engine can be ensured, which increases the reliability and commercial quality of the vehicle.06-13-2013
20130151123METHOD AND DEVICE FOR OPERATING A PRESSURE-REGULATING VALVE - A method for operating a pressure-regulating valve of a fuel injection system of an internal combustion engine of, in particular, a motor vehicle; the fuel injection system including a pressure reservoir for storing pressurized fuel, as well as a feed device for delivering fuel to the pressure reservoir; and fuel being removable from the pressure reservoir via the pressure-regulating valve. In an overrun mode of the internal combustion engine, a delivery quantity of fuel delivered to the pressure reservoir by the feed device is set to a value greater than zero, and that a fuel pressure in the pressure reservoir is ascertained.06-13-2013
20120283934Method and Device for Monitoring a High-Pressure Fuel System - A method for monitoring a fuel pressure in a fuel injection system of an internal combustion engine. A setpoint fuel pressure is initially set in the fuel injection system. Next, a first fuel injection and a subsequent second fuel injection are executed at a time interval shorter than a decay time of a pressure wave in the fuel injection system, triggerable by the first fuel injection. In an additional step, a monitored fuel injection quantity, which is injected via the second fuel injection, is ascertained. An action is executed if the monitored fuel injection quantity differs from a setpoint fuel injection quantity, which is predefinable for the setpoint fuel pressure, by more than a limiting value. The invention also relates to a computer program product for executing the method and to a device for monitoring a fuel pressure in a fuel injection system of an internal combustion engine.11-08-2012
20120283933METHOD FOR OPERATING A FUEL INJECTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A method for operating a fuel injection system of an internal combustion engine is described in which pressurized fuel is provided in a pressure storage device and a fuel pressure prevailing in pressure storage device is regulated with the aid of a pressure regulation, during a first measuring interval at least one fuel withdrawal from the pressure storage device taking place, and during a second measuring interval no fuel withdrawal from the pressure storage device of this type taking place, and during the first and the second measuring intervals a performance quantity of the pressure regulation being ascertained in each case, and the fuel quantity withdrawn during the first measuring interval being ascertained for the at least one withdrawal from a difference of the ascertained performance quantities of the pressure regulation.11-08-2012
20130158840ASYMMETRIC WAVELET KERNEL IN SUPPORT VECTOR LEARNING - Example methods of modeling a nonlinear dynamical system such as a vehicle engine include providing a model using linear programming support vector regression (LP-SVR) having an asymmetric wavelet kernel, such as derived from a raised-cosine wavelet function. The model may be trained to determine parallel model parameters while in a series-parallel configuration, and operated in the parallel configuration allowing improved and more flexible model performance. An improved engine control unit may use an LP-SVR with an asymmetric wavelet kernel.06-20-2013
20130158841INTERNAL COMBUSTION ENGINE DIAGNOSTIC DEVICE AND INTERNAL COMBUSTION ENGINE DIAGNOSTIC METHOD - An internal combustion engine diagnostic device and an internal combustion engine diagnostic method identify an abnormal cylinder having an abnormal air-fuel ratio among a plurality of cylinders during the operation of an internal combustion engine. The internal combustion engine diagnostic device comprises: an air-fuel ratio control unit for changing the air-fuel ratio in a stepwise manner by controlling a fuel injection amount adjusting means that adjusts the fuel injection amount of each of the plurality of cylinders; and an abnormal cylinder identification unit for identifying an abnormal cylinder on the basis of the relationship between each air-fuel ratio changed in a stepwise manner and the number of misfires occurring in the plurality of cylinders, the number being counted by a misfire counter for each air-fuel ratio changed in a stepwise manner.06-20-2013
20130184973FUEL INJECTION AMOUNT CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - A fuel injection amount control apparatus disclosed in the present specification calculates a time integral value SDVoxslow by accumulating values each obtained by multiplying a deviation DVoxslow between an output value Voxs of a downstream air-fuel ratio sensor disposed downstream of a catalyst and a predetermined downstream target value Voxsref by a predetermined adjusting gain K (step 07-18-2013
20130184971CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - A control device for an internal combustion engine that enhances precision of realization of required torque while enhancing emission performance by positively changing an air-fuel ratio. The control device generates a target air-fuel ratio by lessening a change speed of a required air-fuel ratio of an internal combustion engine. However, when the required air-fuel ratio is made rich with return from fuel cut, lessening of the change speed of the required air-fuel ratio is stopped, and the required air-fuel ratio is directly outputted as a target air-fuel ratio. The control device calculates a target air quantity for realizing the required torque under the target air-fuel ratio. The control device manipulates an actuator for air quantity control in accordance with the target air quantity, and manipulates an actuator for fuel injection quantity control in accordance with the target air-fuel ratio.07-18-2013
20110313642CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE INCLUDING VARIABLE VALVE OPERATING MECHANISM - Provided is a control apparatus, which can successfully suppress that deterioration of combustion is caused in response to inflow of a large amount of blow-by gas to cylinders at the time of a valve return from a valve stop state in an internal combustion engine including a positive crankcase ventilation system and a variable valve operating mechanism that is capable of stopping at least one valve of an intake valve and exhaust valve in a closed state. A valve stop control is performed which stops the intake valve and exhaust valve in a closed state when a fuel cut of the internal combustion engine is executed. A deviation amount ΔA/F between a predetermined target air fuel ratio and an actual air fuel ratio detected by an A/F sensor at the time of a valve return is obtained. A correction is performed to decrease a fuel injection amount by a fuel amount equivalent to the deviation amount ΔA/F at the time of the subsequent valve returns.12-22-2011
20110313641METHOD AND SYSTEM FOR PRE-IGNITION CONTROL - Methods are provided for controlling an engine in response to a pre-ignition event. A pre-ignition threshold and a pre-ignition mitigating action are adjusted based on a rate of change of cylinder aircharge. As a result, pre-ignition events occurring during transient engine operating conditions are detected and addressed different from pre-ignition events occurring during steady-state engine operating conditions.12-22-2011
20110313640Control System Including Electronic Control Apparatus and Sensor Apparatuses Bus-Connected to Electronic Control Apparatus - The control system has a structure in which sensor apparatuses each having a data communication function are connected to an electronic control apparatus through a common communication line, and the sensors of the sensor apparatuses are connected to the electronic control apparatus through separate individual signal lines to transmit sensor signals to the electronic control apparatus. The electronic control apparatus is configured to, prior to transmitting communication data to one of the sensor apparatuses through the communication line, set the signal line connected to the selected sensor apparatus in a state in which the voltage of the signal line is outside a variation range corresponding to a voltage range of the sensor signal, and set the signal lines connected to the other sensor apparatuses to each of which the communication data is not addressed in a state in which the voltage of the signal line is within the variation range.12-22-2011
20130191008METHOD FOR INJECTING FUEL - Embodiments for adjusting fuel injection are provided. In one example, a method comprises adjusting fuel injection based on fuel concentration in an engine intake manifold, and during idle and when EGR is disabled, adjusting fuel injection based on the fuel concentration and a fuel pushback amount. In this way, fuel injection may be adjusted based on fuel concentration in the intake manifold.07-25-2013
20130191009MOTORCYCLE - A motorcycle includes a CPU (Central Processing Unit) of an ECU (Electronic Control Unit) that drives a fuel heating device when a fuel heating condition is satisfied and the result of a fuel heating prohibition determination process indicates that heating is permitted. On the other hand, the CPU does not drive the fuel heating device when the fuel heating condition is not satisfied or when the result of the fuel heating prohibition determination process indicates that heating is prohibited. In the fuel heating prohibition determination process, the CPU determines a tilted state of the motorcycle, and prohibits or permits heating of fuel in a fuel pipe by the fuel heating device based on a detection result of the tilted state.07-25-2013
20130191010CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - An internal combustion engine control device the present invention provides is a control device that can realize both of request torque and a request A/F for each of cylinder groups with high precision, even when the request A/F differs at each of the cylinder groups. The present control device sets a reference A/F within a range from the leanest A/F to the richest A/F out of the request A/Fs to the respective cylinder groups. The present control device calculates a target air quantity for realizing the request torque under the reference A/F, based on data that defines a relation between engine output torque and an air quantity in relation to an A/F. The present control device controls a throttle opening in accordance with the target air quantity, and controls fuel injection amounts of the respective cylinders in accordance with the request A/F s to the respective cylinder groups.07-25-2013
20120290197CONTROL DEVICE FOR ENGINE - A control device includes: a first phase changing portion retarding a first intake valve phase relative to a second intake valve phase; a throttle valve adjusting an intake air amount of the engine, and a control portion configured to perform an intake valve phase control which controls the first phase changing portion to retard the first intake valve phase relative to the second intake valve phase such that an air amount in the cylinder of the engine is reduced to a target value to perform rich combustion, and the control portion configured to perform a throttle valve closing control which controls the throttle valve such that the air amount in the cylinder is the target value or smaller after the air amount in the cylinder is not reduced to the target value or smaller by the intake valve phase control performed by the first phase changing portion.11-15-2012
20120290196CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A control apparatus for an internal combustion engine is provided, which is capable of suppressing deterioration of exhaust emission due to an unburned fuel contained in oil which enters a combustion chamber during valve stop control while preventing inflow of fresh air to a catalyst, at a time of valve return following return from fuel cut. Variable valve operating apparatuses having valve stop mechanisms capable of changing operation states of an intake valve and an exhaust valve between valve operation states and valve closed and stopped states are included. Valve stop control that changes the operation states of the intake valve and the exhaust valve to the valve closed and stopped states is performed, at a time of execution of the fuel cut. When a return request from the fuel cut with the valve stop control is detected, a fuel is supplied to a combustion chamber before the operation state of the exhaust valve is returned to the valve operation state. The fuel supply amount in this case is corrected in accordance with an amount of the unburned fuel contained in the oil which enters into the combustion chamber from a crank chamber side during the fuel cut with the valve stop control.11-15-2012
20120290194AUTOMATIC STOP/RESTART DEVICE FOR INTERNAL COMBUSTION ENGINE - The automatic/stop restart device includes a restart control module for performing restart control for the internal combustion engine by pushing out a pinion gear (11-15-2012
20120022772ABNORMALITY DETERMINATION SYSTEM FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - When the ratio of the amount of vaporized fuel (purge amount) to be introduced into an intake passage of an engine from a fuel tank through a purge passage pipe, a purge control valve, etc. to the total amount of fuel (total fuel amount) to be supplied to the engine is large, an abnormality determination system acquires, as a parameter Pon, the air-fuel ratio imbalance index value that increases as the difference between the air-fuel ratios of the respective cylinders increases. When the purge amount is small relative to the total fuel amount, the determination system acquires the air-fuel ratio imbalance index value as a parameter Poff. When the difference between the parameters Pon and Poff is less than a predetermined value and at least one of these parameters is greater than a predetermined threshold value, the determination system determines that an inter-cylinder air intake amount variation abnormality is occurring.01-26-2012
20120022771FUEL INJECTION CONTROL SYSTEM FOR DIRECT-INJECTION ENGINE - In an engine of a direct-injection type, a split injection (a fuel injection in an intake stroke and a fuel injection in a compression stroke) is carried out. A compression-stroke injection amount is gradually decreased or increased when the split injection is carried out. Engine rotational speed, which varies by combustion of such injected fuel, is detected for respective fuel injection amounts, which are varied (decreased or increased) as above. Such a fuel injection amount, with which the engine rotational speed becomes maximum, is calculated and set as a basic injection amount for the compression-stroke injection. The fuel injection in the compression stroke is then controlled based on the basic injection amount.01-26-2012
20120022770CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - A control device for an internal combustion engine is provided. The control device includes means which controls fuel injection by a fuel injection device, and means which controls the throttle. The fuel injection control means sequentially restarts fuel injection for each cylinder in accordance with an ignition sequence among cylinders when cancellation conditions of fuel cut are satisfied during implementation of the fuel cut. Meanwhile, the throttle control means firstly controls the throttle to a closing side when the cancellation conditions of fuel cut are satisfied. The throttle is controlled to the closing side, whereby the air amount in the intake pipe is decreased, and the air amount in a cylinder which is the basis of calculation of a fuel injection amount is also decreased.01-26-2012
20120029793CALIBRATION SCHEME FOR AN EXHAUST GAS SENSOR - Various systems and methods are described for controlling an engine in a vehicle in response to an equilibrium value of an exhaust gas constituent generated from an exhaust gas sensor. One example method comprises during engine fueling below a threshold amount where at least one intake valve and one exhaust valve of the engine are operating: generating an equilibrium value of an exhaust gas constituent reading of the exhaust gas sensor, the equilibrium value based on a trajectory of the exhaust gas constituent reading, and under selected engine combusting conditions, adjusting the sensor signal based on the equilibrium value.02-02-2012
20120029792FUEL INJECTION AMOUNT CONTROL SYSTEM AND FUEL INJECTION AMOUNT CONTROL DEVICE FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - A fuel injection amount control system corrects the amount of fuel injected from each fuel injection valve in a feedback manner, based on an output value of an upstream air-fuel ratio sensor, so that the air-fuel ratio of exhaust gas flowing into a three-way catalyst coincides with a target air-fuel ratio. Also, the control system performs a high-pass filtering operation on the output value of the upstream air-fuel ratio sensor, so as to obtain a post-high-pass-filtering output value by removing a component that varies with variations in the center air-fuel ratio of the engine, from the output value of the upstream air-fuel ratio sensor. Then, the control system acquires an air-fuel ratio imbalance index value that increases as the degree of ununiformity in the air-fuel ratio among cylinders is larger, based on the post-high-pass-filtering output value.02-02-2012
20130197784CONTROL APPARATUS FOR GENERAL PURPOSE ENGINE - A general purpose engine control apparatus can detect misfire occurrence with high accuracy, while reducing adaptation man hours of misfire determination. The apparatus includes a first air/fuel ratio determiner to make a rich/lean determination, an injection amount corrector to calculate a corrected injection amount corresponding to a stoichiometric air/fuel ratio, an injection controller to supply fuel to the engine so as to match the corrected injection amount, a second air/fuel ratio determiner to make a rich/lean determination based on a comparison of the O2 sensor output with a rich and a lean determination voltage, a rich/lean period calculator to calculate a rich/lean period according to the determination of the second air/fuel ratio determiner, and a misfire determiner to determine the presence or absence of a misfire based on the rich/lean period. The injection controller stops fuel injection to the engine in the presence of a misfire.08-01-2013
20120059568ENGINE FUEL INJECTION CONTROL APPARATUS - In the case where it is determined, based on a throttle opening degree change detected by a throttle sensor 03-08-2012
20120065869System and Method for Controlling the Number of Pilot Injections - A system and a method for controlling the number of pilot injections reduces combustion noise and improves fuel economy by deciding the actual number of the pilot injections based on a change amount of a driving condition and injecting a fuel according to the actual number of the pilot injections in a case of acceleration. The system may include a detecting portion detecting a driving condition of an engine; a control portion calculating a change amount of the driving condition from the driving condition of the engine, and deciding the actual number of the pilot injections based on the driving condition of the engine and the change amount of the driving condition; and an injector injecting a fuel to the engine through a main injection and/or the pilot injections according to the actual number of pilot injections.03-15-2012
20130211693METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE WITH A TURBOCHARGER ARRANGEMENT AND CONTROL UNIT FOR AN ENGINE WITH A TURBOCHARGER ARRANGEMENT - Methods are provided for controlling an engine. One method may include adjusting airflow to a turbocharger arrangement with a turbine bypass valve bypassing a first turbine from a high-pressure turbocharger and a wastegate bypassing a second turbine from a low-pressure turbocharger; responsive to valve degradation, setting the turbine bypass valve fully open and the wastegate fully closed; and limiting engine torque based on a flow through a compressor of the low pressure turbocharger. In the event of valve degradation, limiting torque may reduce overspeed and surge of the low pressure turbocharger.08-15-2013

Patent applications in class Controlling fuel quantity