Entries |
Document | Title | Date |
20080257318 | Exhaust- gas recirculation control responsive to a load signal at an in line injection pump - An exhaust gas recirculation control system for internal combustion engines includes an intake pipe ( | 10-23-2008 |
20080276915 | CONTROL METHOD AND CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - An internal combustion engine includes a throttle controlling mechanism; a valve characteristic varying mechanism which controls an internal EGR rate by the control of an overlap period Pa and a non-overlap period Pb; and an output setting means which sets a required amount of engine output. The throttle controlling mechanism controls an opening degree of a throttle valve to fully open the throttle valve at a predetermined load Da with an increase in an operating amount D in a first load range Fa which covers load range below the predetermined load Da in a low-load range, and to keeps the throttle valve fully opened in a second load range Fb which covers a load range over the predetermined load Da. The valve characteristic varying mechanism controls the engine output by controlling the overlap period Pa or the non-overlap period Pb according to the required amount D over the entire load range, and controls valve operation characteristics to obtain a maximum internal EGR rate at the predetermined load Da. | 11-13-2008 |
20080276916 | Method and Device for Controlling a Valve for Recycling Gases Burned During an Engine Starting Phase - A method carried out by a control device, the method holding a valve EGR completely opened during a determined short time after a starting phase of a diesel engine, which is provided with an EGR recirculation, and controlling the valve EGR in a partially closed state during the starting time of the engine to increase the engine speed to a threshold speed corresponding to the end of the starting phase. The control is progressively carried out according to a determined closing instruction via a calibration by using data representative of engine speed and ambient temperature. The dynamically controlled recirculation makes it possible, in particular, to accumulate more fuel at the staring phase without increasing injected quantities, to increase the speed of engine actuated by a starter, and to avoid engine blocking. | 11-13-2008 |
20080308080 | Exhaust Gas Recirculation Control System - The control signal on the EGR valve is based on an indication of whether the engine will soon encounter a condition with insufficient vacuum in the engine intake to operate the EGR valve. When such condition is about to be encountered, the desire is to supply a vacuum on the EGR valve and to hold such vacuum so that the EGR valve remains open. | 12-18-2008 |
20090084365 | LOAD CONTROL MECHANISM FOR INTERNAL COMBUSTION ENGINE - To avoid the generation of a pumping loss, a communication passage is formed as a bypass passage between an exhaust port and a combustion chamber in an internal combustion engine. The communication passage is provided with a one-way valve as an exhaust gas return amount adjustment means. The one-way valve includes a spring member having a spring constant set to the value such that a valve body does not displace toward the combustion chamber under the pressure of the exhaust gas in the exhaust port. An opening degree of the one-way valve is autonomously adjusted depending on the amount of air introduced from an intake manifold when the pressure within the combustion chamber becomes negative in the intake stroke. Then inside of the combustion chamber is kept at substantially the atmospheric pressure with the exhaust gas returned to the combustion chamber via the communication passage and the aforementioned air. | 04-02-2009 |
20090165758 | EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to provide a technology that enables to enhance the effect of decreasing the NOx emission achieved by an exhaust gas purification system as a whole while favorably achieving both reduction in the amount of NOx generated in an internal combustion engine by means of EGR and reduction reaction of NOx in an NOx catalyst even when a reduction process for the NOx catalyst is performed while EGR is being performed. In the invention, in the case where addition of fuel into an exhaust pipe from a fuel addition valve | 07-02-2009 |
20090199824 | METHOD FOR CONTROLLING AN ENGINE PROVIDED WITH AN EXHAUST GAS RECYCLING LOOP - An engine control, and in particular a method for controlling an engine including a low-pressure exhaust gas recycling loop. The method adjusts a predetermined engine operating parameter by controlling the position of an exhaust gas recycling valve, which is placed in the loop, for determining whether the predetermined measured quantity of the valve respects a predetermined criteria, and controls the position of an exhaust shutter, which is arranged outside the loop, when the quantity does not respect the criteria. | 08-13-2009 |
20090199825 | Apparatus, System, and Method for Efficiently Operating an Internal Combustion Engine Utilizing Exhaust Gas Recirculation - An apparatus, system, and method are disclosed for efficiently operating an engine utilizing exhaust gas recirculation (EGR). The apparatus includes an exhaust manifold receiving exhaust gas from a first cylinder set, an EGR manifold receiving exhaust gas from a second cylinder set, and a passage comprising a variable restriction. The passage fluidly couples the exhaust manifold to the EGR manifold. The apparatus further includes a controller with modules for interpreting engine operating conditions and controlling actuators in response to the engine operating conditions. | 08-13-2009 |
20090250042 | System and Method for Controlling a Flow of Intake Air Entering an Internal Combustion Engine - A system and method are provided for controlling a flow of intake air entering an internal combustion engine. At least some of the intake air is diverted away from the engine in response to detection of a first operating condition that is indicative of a minimum engine fueling rate. A second operating condition that is indicative of a flow rate of the intake air entering the engine is monitored, and diverting at least some of the intake air away from the engine is discontinued if the second operating condition indicates that the flow rate of the intake air entering the engine is within a threshold value of a target flow rate. | 10-08-2009 |
20090250043 | System and Method for Controlling an Exhaust Gas Recirculation System - A system and method are provided for controlling recirculation of exhaust gas to an internal combustion engine having an exhaust gas recirculation (EGR) system comprising an EGR conduit coupled between an exhaust manifold and an intake manifold of the engine. Exhaust gas produced by the engine is trapped within the EGR system in response to detection of a first operating condition that is indicative of a minimum engine fueling rate. The trapped exhaust gas is released from the EGR system into the intake manifold of the engine in response to detection of a second operating condition that is indicative of a subsequent increase in engine fueling rate above the minimum engine fueling rate. | 10-08-2009 |
20100000500 | EGR SYSTEM FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING THE SAME - An EGR system includes a high-pressure EGR passage that provides communication between an exhaust pipe, at a portion upstream of a turbine of a turbocharger, and an intake pipe, at a portion downstream of a compressor; a low-pressure EGR passage that provides communication between the exhaust pipe, at a portion downstream of the turbine, and the intake passage, at a portion upstream of the compressor; and an exhaust gas catalyst provided upstream of a position at which the low-pressure EGR passage is connected to the exhaust pipe. When an internal combustion engine is in the transitional state from the low-load operating state to the high-load operating state (S | 01-07-2010 |
20100037873 | INTERNAL COMBUSTION ENGINE AND ASSOCIATED OPERATING METHOD - In a method of operating an internal combustion engine having at least two combustion chambers, each combustion chamber contributes torque to the total torque of the internal combustion engine, and the internal combustion engine is designed in such a way that a quantity of exhaust gas can be recycled into combustion chambers. The method has the steps: (a) detecting the torque contributions of at least two combustion chambers, then (b) changing the quantity of exhaust gas recycled into the combustion chambers, the torque contribution of which has been detected in step (a), then (c) detecting the torque contributions of at least two combustion chambers, the torque contribution of which has been detected in step (a), then (d) determining the change in the torque contributions as a result of the change in the quantity of recycled exhaust gas, and then (e) outputting a signal as a function of the change in the torque contributions. | 02-18-2010 |
20100163007 | VIBRATION- AND PULSATION-ATTENUATED ELECTROPNEUMATIC CONVERTER - An electropneumatic converter for connection with an exhaust recirculation valve in a motor vehicle. The electropneumatic converter includes a vacuum port and an atmospheric pressure port configured to connect with a valve chamber using a valve device, wherein a mixed pressure is formed in the valve chamber and supplied to a mixed pressure port. An armature is affixed to a valve body of the valve device movable in an axial direction, the valve body being connected to a suspension device, wherein the armature is displaceable in the axial direction using a solenoid. The electropneumatic converter also includes a damping element configured to dampen the axial movement of the armature and the valve device affixed thereto. The damping element includes at least one of an elastomer or a foamed material. | 07-01-2010 |
20100186727 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE, AND CONTROL METHOD THEREOF - A control device for an internal combustion engine ( | 07-29-2010 |
20100269802 | MALFUNCTION DIAGNOSTIC APPARATUS AND MALFUNCTION DIAGNOSTIC METHOD FOR INTAKE AIR TEMPERATURE SENSORS - A malfunction diagnostic apparatus for intake air temperature sensors includes a coolant temperature sensor; a first determination portion that determines that a precondition for performing a malfunction diagnosis is satisfied when a process of starting an engine is started, if a detected coolant temperature is determined to be equal to an intake air temperature detected by an intake air temperature sensor provided at a portion that is likely to be cooled, and a decrease amount, by which the detected coolant temperature decreases, is equal to or larger than a preset value; a second determination portion that makes a tentative determination based on a difference between the detected intake air temperatures, if the precondition is satisfied; and a third determination portion that determines whether the tentative determination is an invalid determination or a valid determination, based on a change in the detected intake air temperatures during a given time period. | 10-28-2010 |
20100326408 | CONDENSATION CONTROL SYSTEMS AND METHODS - A condensation control system for a vehicle comprises a short route (SR) target module, a long-route (LR) target module, and a humidity adjustment module. The SR target module controls a first opening target for opening of a first exhaust gas recirculation (EGR) valve and a first throttle valve based on a SR target and a SR adjustment. The LR target module controls a second opening target for opening of a second EGR valve and a second throttle valve based on a LR target and a LR adjustment. The humidity adjustment module adjusts the SR and LR adjustments based on a humidity adjustment when condensation is detected in a system that provides a gas to an engine for combustion and determines the humidity adjustment based on a difference between a humidity within the system and a predetermined humidity. | 12-30-2010 |
20110017179 | EGR Flow Rate Control Apparatus of Internal Combustion Engine - An EGR flow rate control apparatus of an internal combustion engine is provided that can correct with high accuracy an EGR gas flow rate measured by a gas flow rate measurement apparatus in an EGR passage and control with high accuracy a gas flow rate regulating valve to reduce discharge amounts of PM and NOx in exhaust gases. An EGR flow rate control apparatus | 01-27-2011 |
20110023847 | ADAPTIVE EGR CONTROL FOR INTERNAL COMBUSTION ENGINES - A system and method for controlling an internal combustion engine having an EGR valve determine a base valve position to deliver a target flow using a stored map and adjust the base position in response to differential pressure across an orifice in the EGR flow to move the valve to a position different from the base position to provide the target flow. | 02-03-2011 |
20110023848 | DEVICE FOR CONTROLLING THE EXHAUST-GAS TURBOCHARGING OF AN INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE - A device for controlling the exhaust-gas turbocharging of an internal combustion engine having an exhaust-gas turbocharging device, has an estimated value unit for determining a mass flow through a turbine system, a regulating unit for determining a regulating exhaust-gas back pressure as a function of a nominal charge pressure and an actual charge pressure, and also a unit for generating at least one actuating signal for at least one actuator of the turbine system as a function of the regulating exhaust-gas back pressure and of the mass flow through the turbine system, wherein the estimated value unit has a turbine system model for determining an estimated overall efficiency of the turbine system and a model for determining an estimated overall efficiency of a compressor system having at least two compressors, and wherein the regulating unit is set up to determine the regulating exhaust-gas back pressure using the estimated overall efficiencies | 02-03-2011 |
20110048390 | SWITCHABLE WATER PUMP CONTROL SYSTEMS AND METHODS - An engine control system for a vehicle comprises a pump control module and a heating request determination module. The pump control module disengages a switchable water pump from an engine upon startup of the engine. The heating request determination module generates a heat request signal that indicates whether heating of a passenger cabin of the vehicle has been requested based on ambient air temperature, humidity of ambient air, and a status of an air conditioner clutch. The pump control module selectively engages the switchable water pump after the heat request signal is generated. | 03-03-2011 |
20110067680 | Turbocharger and Air Induction System Incorporating the Same and Method of Making and Using the Same - A turbocharger for an internal combustion engine includes a turbine comprising a turbine wheel attached to a turbine shaft, the turbine wheel and shaft rotatably disposed in a turbine housing, the turbine housing comprising a turbine volute conduit, the turbine volute conduit having a turbine volute inlet and an EGR conduit inlet, the EGR conduit inlet radially spaced from the turbine volute inlet along the turbine volute conduit and opening into an EGR conduit that is joined to the turbine volute conduit. The turbine volute inlet is configured for fluid communication of an exhaust gas received from an engine to the turbine wheel, the EGR conduit configured for fluid communication of the exhaust gas to an engine intake conduit. The turbocharger also includes a compressor comprising a compressor wheel attached to the turbine shaft, the compressor wheel and turbine shaft rotatably disposed in compressor housing. | 03-24-2011 |
20110088674 | CONTROLLING EXHAUST GAS RECIRCULATION THROUGH MULTIPLE PATHS IN A TURBOCHARGED ENGINE SYSTEM - A method of controlling exhaust gas recirculation (EGR) in a turbocharged engine system including multiple EGR paths to account for at least one of system constraints, or dead time and/or lag time associated with at least one of the EGR paths. | 04-21-2011 |
20110094485 | INTERSTAGE EXHAUST GAS RECIRCULATION SYSTEM FOR A DUAL TURBOCHARGED ENGINE HAVING A TURBOGENERATOR SYSTEM - An internal combustion engine defined as having an engine block for internal combustion, a high-pressure turbocharger for delivering pressurized intake air to the engine block, a low-pressure turbocharger for delivering pressurized intake air to the high-pressure turbocharger, a turbogenerator for recovering heat energy from the exhaust gas downstream of the low-pressure turbocharger to generate electricity, and an exhaust gas recirculation (EGR) system comprising an EGR-pump drawing exhaust gas from an EGR inlet located between the low-pressure and high-pressure turbocharger turbines, wherein the EGR-pump controllably delivers exhaust gas to an EGR mixer in the pressurized intake air stream at a location between the low-pressure and high-pressure turbocharger compressors. An electronic control unit (ECU) is adapted to command the EGR-pump to deliver a desired EGR flow-rate to the engine block based on look-up tables and either open-loop and/or closed-loop control algorithms. | 04-28-2011 |
20110094486 | METERING EXHAUST GAS RECIRCULATION SYSTEM FOR A DUAL TURBOCHARGED ENGINE HAVING A TURBOGENERATOR SYSTEM - An internal combustion engine having an engine block for internal combustion, a high-pressure (HP) turbocharger for delivering pressurized intake air to the engine block, a low-pressure (LP) turbocharger for delivering pressurized intake air to the HP turbocharger, a turbogenerator for recovering heat energy from the exhaust gas downstream of the LP turbocharger to generate electricity, and an exhaust gas recirculation (EGR) system comprising an EGR-pump drawing exhaust gas from an EGR inlet located downstream of the turbogenerator, wherein the EGR-pump controllably delivers exhaust gas to an EGR mixer in the pressurized intake air stream at a location between the LP turbocharger and HP turbocharger. An electronic control unit (ECU) is adapted to command the EGR-pump to deliver a desired EGR flow-rate to the engine block based on look-up tables and either open-loop and/or closed-loop control algorithms. | 04-28-2011 |
20110132337 | EXHAUST TREATMENT SYSTEM FOR INTERNAL COMBUSTION ENGINE - Systems and methods are provided for operating an engine exhaust system. In one example, a system comprises a first valve, and a second valve coupled to the first valve via a shaft. A first position of the shaft situates the first valve closed and the second valve open, a second position situates the second valve closed and the first valve open by a first amount, and a third position situates the second valve closed and the first valve open by a second, larger amount. | 06-09-2011 |
20110162626 | Coordination of HP and LP EGR - A method for charging an intake manifold of an engine comprises adjusting an LP EGR flow rate and an uncooled HP EGR flow rate within first limits to maintain a target dilution level in the intake manifold at steady-state. The method further comprises adjusting the LP EGR and uncooled HP EGR rates within second limits, different from the first, to maintain the target dilution level in the intake manifold during transient conditions. | 07-07-2011 |
20110209691 | WORKING GAS CIRCULATION ENGINE - A working gas circulation engine includes a combustion chamber that can expand a working gas, which has a specific heat ratio higher than that of the air, with the combustion between an oxidizing agent and a fuel; a circulation path that can allow the working gas to circulate from a suction side to an exhaust side of the combustion chamber and can supply the same again to the combustion chamber; a feed means that can feed the gas in a pressure-reduction target section, which is the section whose pressure is to be reduced, to the outside, and a control means that operates the feed means for feeding the gas in the pressure-reduction target section, when the pressure in the pressure-reduction target section is higher than a predetermined pressure that is set in advance. | 09-01-2011 |
20110226223 | INTERNAL COMBUSTION HEAT ENGINE, CONTROL SYSTEM, METHOD FOR DIMENSIONING THE ENGINE, AND AUTOMOBILE WITH SAID ENGINE - The invention relates to an internal combustion heat engine, with at least one combustion chamber for intake gases comprising a mixture consisting of a fuel such as petrol and an oxidiser such as air, connected to an intake circuit (A) for the intake of said intake gases into the chamber and an exhaust circuit (B) for the exhaust of the burnt gases outside the chamber, an exhaust gas recirculation circuit (C, D) connecting the exhaust circuit to the intake circuit, and a control system for the exhaust gas recirculation. The control system is arranged so that the exhaust gas recirculation is implemented for at least one operation point defined by an engine speed and a torque output by the engine, for which the output torque is higher than 50% of the maximum engine torque. The invention can be used for operating the engine with optimal stoichiometric mixture and ignition advance without the occurrence of rattling. | 09-22-2011 |
20110239997 | COMBUSTION STABILITY ENHANCEMENT VIA INTERNAL EGR CONTROL - A method for controlling combustion in a cylinder of a turbocharged engine in which intake air is reserved upstream of the cylinder. The method comprises decreasing an internal EGR rate in the cylinder during a tip-out condition if the temperature of the intake air is above a threshold, and increasing the internal EGR rate in the cylinder during a tip-out condition if the temperature of the intake air is below the threshold. | 10-06-2011 |
20110247597 | SYSTEM AND METHOD FOR IMPROVING EXHAUST GAS RECIRCULATION FOR A TURBOCHARGED ENGINE - A system and method for delivering EGR to an internal combustion engine is presented. The system can reduce system cost and lower system complexity. | 10-13-2011 |
20110290224 | SYSTEM AND METHOD FOR CONTROLLING EXHAUST GAS RECIRCULATION SYSTEMS - A control system for an engine includes a feedback determination module, a feed-forward determination module, and a valve control module. The feedback determination module generates an exhaust gas recirculation (EGR) feedback value based on engine speed and a difference between desired and measured combustion phasing. The feed-forward determination module generates an EGR feed-forward value based on a difference between desired and measured mass air flow (MAF) rates. The valve control module controls an EGR valve based on the EGR feedback and feed-forward values, an intake manifold absolute pressure (MAP), an engine speed, and an exhaust back pressure (EBP). | 12-01-2011 |
20110308503 | EGR CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An EGR control apparatus for an internal combustion engine, which is capable of properly controlling an inert gas amount of two types of EGR gas supplied to cylinders of the engine via two paths different from each other, thereby making it possible to ensure a stable combustion state, reduced exhaust emissions, and improve operability. The EGR control apparatus includes low-pressure and high-pressure EGR devices, and an ECU. The ECU controls the low-pressure and high-pressure EGR gas amounts according to engine speed and demanded torque, and when a combination of engine speed and demanded torque is in a predetermined region, the low-pressure and high-pressure EGR gas amounts are controlled such that inert gas in low-pressure EGR gas exceeds in amount inert gas in high-pressure EGR gas, and the former more exceeds the latter as engine speed is higher or demanded torque is larger. | 12-22-2011 |
20120000448 | DIESEL ENGINE SYSTEM AND CONTROL METHOD FOR A DIESEL ENGINE SYSTEM - A diesel engine system includes a cylinder, an exhaust manifold, an exhaust gas recirculation (EGR) manifold, and a valve. The exhaust manifold is fluidly coupled with the cylinder and directs exhaust generated in the cylinder to an exhaust outlet that delivers the exhaust to an external atmosphere. The EGR manifold is fluidly coupled with the cylinder and recirculates the exhaust generated in the cylinder back to the cylinder as at least part of intake air that is received by the cylinder. The valve is disposed between the cylinder and the exhaust manifold and between the cylinder and the EGR manifold. The valve has a donating mode and a non-donating mode. The valve fluidly couples the cylinder with the EGR manifold when the valve is in the donating mode and fluidly couples the cylinder with the exhaust manifold when the valve is in the non-donating mode. | 01-05-2012 |
20120024270 | METHOD OF MODEL-BASED MULTIVARIABLE CONTROL OF EGR AND BOOST FOR INTERNAL COMBUSTION ENGINES - A method to control an exhaust gas recirculation and a manifold air pressure in an engine includes utilizing a decoupling matrix within a multiple input and multiple output controller to determine an exhaust gas recirculation command and a manifold air pressure command, wherein the decoupling matrix is configured based upon a diagonally dominant model of the engine compensated by the determined exhaust gas recirculation command and the manifold air pressure command. The exhaust gas recirculation and manifold air pressure are controlled based upon the determined exhaust gas recirculation command and the determined manifold air pressure command. | 02-02-2012 |
20120037134 | METHOD AND SYSTEM FOR EXHAUST GAS RECIRCULATION CONTROL - Methods and systems are provided for adjusting an EGR valve and one or more intake throttles responsive to the output of an intake oxygen sensor to provide a desired amount of EGR flow while maintaining engine torque. The adjustments are coordinated to improve distributed control of the EGR valves and intake throttles, and enable EGR flow even when one actuator is limited. | 02-16-2012 |
20120125301 | EXHAUST GAS RECIRCULATION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - Providing an exhaust gas recirculation control device of an internal combustion engine by which overshoots or undershoots of an EGR control valve can be prevented, and the tracking performance as to target openings as well as the reliability of the device can be enhanced based on simple control logic. An exhaust gas recirculation control device, being provided with: a feedback control unit | 05-24-2012 |
20120138027 | Exhaust Gas Controlling Method of Engine - An EGR system control method of an engine may include calculating a target mass flux ({dot over (m)} | 06-07-2012 |
20120138028 | EXHAUST GAS CONTROLLING METHOD OF ENGINE - An exhaust gas control method of an engine may include calculating a target mass flux of EGR gas by using air mass entering into a cylinder and target air mass supplied into the engine, calculating a target effective flow area (EFA | 06-07-2012 |
20120285428 | WORKING GAS CIRCULATION TYPE ENGINE - A working gas circulation type engine includes a combustion chamber in which a working gas having a ratio of specific heats higher than that of air can be expanded by combustion of a fuel, a circulation path capable of circulating a gas containing the working gas from a gas exhaust side to a gas suction side of the combustion chamber and supplying the gas containing the working gas to the combustion chamber again, and a control device that changes a control parameter for controlling the combustion of the fuel based on a ratio of specific heats of the gas circulating in the circulation path. Therefore, there can be provided the working gas circulation type engine capable of obtaining a stable output. | 11-15-2012 |
20120325187 | EGR FLOW CONTROL FOR LARGE ENGINES - An internal combustion engine and control system are provided having improved efficiency through improved exhaust flow control. The engine includes at least one bank of combustion cylinders and a respective exhaust manifold for conveying exhaust to the atmosphere. Further included is an exhaust gas restriction valve (ERV) associated with the exhaust manifold for selectively increasing backpressure on the associated bank of combustion cylinders and for redirecting a portion of the exhaust into an exhaust gas conditioning system for conditioning the portion of the exhaust and returning it to an air intake of the engine. An engine exhaust gas recirculation (EGR) valve in the exhaust gas recirculation system restricts the flow of conditioned exhaust, and an EGR flow controller operates the EGR valve in one of a substantially open and substantially closed condition and controls the flow of conditioned exhaust to the air intake by modulating the ERV. | 12-27-2012 |
20120325188 | METHOD AND APPARATUS FOR MEASURING AND CONTROLLING THE EGR RATE IN A COMBUSTION ENGINE - The present invention provides for a method and apparatus for measuring and controlling the EGR rate in a combustion engine system, comprising an EGR cooler, an EGR valve and a turbine, and determining the EGR mass flow (dm | 12-27-2012 |
20120325189 | EGR CONTROLLER FOR INTERNAL COMBUSTION ENGINE - When a constant driving voltage is applied to a motor driving an EGR valve so that the EGR opening degree is varied, an angular speed of the EGR valve becomes minimal at a position where the driving torque of the EGR valve becomes maximal. In view of this, while an opening degree of the EGR valve is varied with a constant driving voltage applied to the motor, the EGR opening degree where the angular speed becomes minimal is learned as a full-close position. | 12-27-2012 |
20130008418 | METHOD OF ENGINE STARTING - An engine starting method is disclosed. In one example, engine operation is adjusted to reduce catalyst light off time. Exhaust temperatures may be increased until a threshold engine temperature is reached. | 01-10-2013 |
20130061831 | EGR FLOW MEASUREMENT - A system and method for measuring an EGR flow rate for an engine having an EGR valve with a selectable EGR valve position and a venturi sensor situated to take a differential pressure measurement relative to recirculated exhaust gas includes determining an EGR valve effective area based on the EGR valve position, determining a weighting factor based on the effective area, calculating a first EGR flow estimate based on the effective area, and calculating a second EGR flow estimate based on the differential pressure measurement of the venturi sensor. A final EGR flow rate is determined based on the weighting factor, the first EGR flow estimate, and the second EGR flow estimate. | 03-14-2013 |
20130104859 | LOW-PRESSURE EXHAUST GAS RECIRCULATION SYSTEM | 05-02-2013 |
20130160750 | ABNORMALITY DETERMINATION SYSTEM FOR INTERNAL COMBUSTION ENGINE, AND ABNORMALITY DETERMINING METHOD FOR INTERNAL COMBUSTION ENGINE - An abnormality determination system for an internal combustion engine includes a plurality of EGR gas supply sections, an EGR gas supply control unit, an air-fuel ratio sensor placed downstream of an exhaust collecting portion, and an abnormality determining unit that determines an abnormality in the internal combustion engine. The abnormality determining unit obtains a change rate corresponding value during shutoff of the EGR gas or during supply of the EGR gas, as an EGR-OFF corresponding value or an EGR-ON corresponding value. The abnormality determining unit obtains a normalized EGR-OFF corresponding value, and obtains a normalized EGR-ON corresponding value. The abnormality determining unit makes an abnormality determines whether one of the EGR gas supply sections is in an abnormal condition in which the EGR gas supply section is blocked, based on a relationship between the normalized EGR-OFF corresponding value and the normalized EGR-ON corresponding value. | 06-27-2013 |
20130174817 | EXHAUST SYSTEM AND METHOD FOR AN INTERNAL COMBUSTION ENGINE - An exhaust system and method for optimizing the efficiency of an internal combustion engine from which spent gas emerges. Spent gas is fed to an exhaust housing that accommodates a venturi. Part of the spent gas travels through the venturi and part travels outside the venturi. Across the mouth of the venturi sits a directing valve plate that can be moved, thereby opening or closing the path through the venturi. Some of the spent gas is reflected rearwardly from the venturi and thus reenters the cylinder. Upon doing so, the reflected spent gas occupies some of the space above the piston, lowers combustion pressure and reduces the velocity and pressure of the gas flow emerging therefrom. | 07-11-2013 |
20130255650 | APPARATUS AND METHOD FOR CONTROLLING EXHAUST GAS RECIRCULATION - An exhaust gas recirculation control apparatus includes: an EGR valve adjusting a flow rate of EGR gas recirculated from an exhaust manifold to an intake manifold; a manifold absolute pressure (MAP) sensor measuring pressure inside the intake manifold; a throttle valve controlling the amount of inflow air; an igniter spraying fuel; an acceleration pedal angular position sensor; a crank position sensor measuring engine RPM; a vehicle speed sensor measuring a speed of a vehicle; and a control portion receiving a pressure signal from the MAP sensor, calculating a ratio of the EGR gas for a total volume of the intake manifold by using pressure variance inside the intake manifold, calculating pressure of the EGR gas by multiplying the pressure of the intake manifold and the ratio of the EGR gas, and converting the pressure of the EGR gas to a flow rate of the EGR gas. | 10-03-2013 |
20130276766 | EXHAUST GAS RECIRCULATION SYSTEMS WITH VARIABLE VENTURI DEVICES - Systems, methods and techniques for exhaust gas recirculation are provided. The system includes a variable venturi device that connects an inlet air supply line and recirculating exhaust gas supply line to an intake manifold supply. A controller in communication with at least one pumping pressure sensor and a flow control element position sensor associated with the variable venturi mixing device is operable to determine a flow rate of the recirculating exhaust gas. The flow rate determination may be used to control NO | 10-24-2013 |
20130312718 | EXHAUST GAS RECIRCULATION APPARATUS FOR ENGINE - An EGR apparatus includes a EGR passage and an EGR valve provided in the EGR passage to regulate an EGR flow rate in the EGR passage. An ECU closes the EGR valve from an open state prior to start of deceleration of the engine based on engine rotation speed detected by a rotation speed sensor, accelerator opening degree detected by an accelerator sensor, and actual opening degree of the EGR valve. During deceleration of the engine, the ECU obtains a target opening degree of the EGR valve according to the separately detected engine rotation speed and accelerator opening degree from a target opening degree map and starts to close the EGR valve when a difference between an actual opening degree and the target opening degree of the EGR valve exceeds a predetermined value. | 11-28-2013 |
20130312719 | CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - Provided is a control apparatus of the internal combustion engine capable of removing deposited foreign matters accumulated on an EGR valve without deteriorating a combustion state of the internal combustion engine. When the vehicle is under deceleration and under fuel cut operation, the ECU opens an EGR shutoff valve and obtains an intake pressure “Pclose” under the EGR valve in the fully closed state. Then, the ECU opens the EGR valve and obtains an intake pressure “Popen” under the EGR valve in the fully opened state. Then, the ECU calculates a difference ΔP between “Popen” and “Pclose”, and closes the EGR shutoff valve on the condition that the difference ΔP is equal to or smaller than a threshold value “Pth1”. Then, the ECU opens the EGR valve, and subsequently opens the EGR valve. | 11-28-2013 |
20130319383 | EXHAUST GAS RECIRCULATION APPARATUS FOR ENGINE - An EGR apparatus includes a EGR passage for allowing part of exhaust gas discharged from a combustion chamber of an engine to an exhaust passage to flow in an intake passage and recirculate back to the combustion chamber, and an EGR valve provided in the EGR passage to regulate an EGR passage in this passage. The EGR valve includes a valve seat, a valve element to be seatable on the valve seat, and a step motor for driving the valve element to open and close. An electronic control device controls the EGR valve to repeat opening and closing of the valve element between a closing position and a small opening position in order to remove foreign matters adhered to the valve seat or valve element during deceleration fuel cutoff of the engine. | 12-05-2013 |
20140007855 | INTERNAL EGR AMOUNT CALCULATION DEVICE FOR INTERNAL COMBUSTION ENGINE - An internal EGR amount calculation device for an internal combustion engine, which is capable of properly and easily calculating an internal EGR amount, thereby making it possible to achieve improvement of calculation accuracy and reduction of computational load, even when the degree of fluctuation in an exhaust pressure during a valve overlap time period is large. The internal EGR amount calculation device of the engine includes an ECU. The ECU calculates a minimum exhaust pressure which is a minimum value of an exhaust pressure during the valve overlap time period, and calculates a blown back gas amount according to the minimum exhaust pressure. Further, the ECU calculates an average exhaust pressure and calculates a remaining gas amount according to the average exhaust pressure. Then, the ECU calculates the internal EGR amount based on the remaining gas amount and the blown back gas amount. | 01-09-2014 |
20140026874 | CONTROL OF ENGINE EGR WITH BACKPRESSURE CONTROL VALVE - A method of controlling engine internal exhaust gas recirculation may include estimating a flow restriction through a diesel particulate filter in an exhaust system of an engine assembly and adjusting a backpressure control valve in the exhaust system downstream of the diesel particulate filter based on the flow restriction. A controlled amount of internal exhaust gas recirculation may be provided to the engine assembly based on adjusting the backpressure control valve. | 01-30-2014 |
20140048051 | Method of Determining Correction Amount of Opening Degree of EGR Valve, Method of Controlling Opening Degree of EGR Valve, and Engine - A method determines a correction amount of an EGR valve opening degree. A basic correction amount map is generated indicating a correlation between rotating speed, load factor, and the correction amount, while the opening degree is maintained at a reference opening degree and the EGR rate is maintained at a target EGR rate, based on correction amounts obtained for mutually different individual combinations of the rotating speed and the load factor. Estimated values of the correction amounts not contained in the basic map are acquired by estimating the distribution of the amounts not in the basic map based on a distribution trend. An extended correction amount map is generated indicating a correlation between the estimated values of the rotating speed, the load factor, and the correction amount while the opening degree is maintained at a reference opening degree and the EGR rate is maintained at a target rate. | 02-20-2014 |
20140090627 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - This invention relates to a control device for internal combustion engine for performing an exhaust recirculation control for controlling an operation condition of an exhaust recirculation device ( | 04-03-2014 |
20140123966 | CONTROL APPARATUS AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - A control apparatus | 05-08-2014 |
20140150760 | METHODS AND SYSTEMS FOR A GAS CONSTITUENT SENSOR - Various systems and methods are described for an engine system with an exhaust gas recirculation system. In one example method, a correction for a gas constituent sensor is determined based on output from the gas constituent sensor and output from a pressure sensor over a range of boost pressure. The gas constituent sensor output is adjusted based on the correction, and an amount of exhaust gas recirculation is adjusted based on the adjusted gas constituent sensor output. | 06-05-2014 |
20140158100 | Six-Stroke Engine Exhaust Gas Recirculation System and Method - An engine combustion cylinder is fluidly connectable to an intake system through an intake valve and to an exhaust system through an exhaust valve. A valve activation system is to activate the intake valve and the exhaust valve. The valve activation system is responsive to a controller providing command signals to the valve activation system such that, when the engine operates in a six-stroke combustion cycle, the intake valve is opened during a recompression stroke to allow a portion of the products from the first combustion stroke to exit the combustion cylinder and enter into the intake system. | 06-12-2014 |
20140174414 | RATE-BASED CONTRACTIVE MODEL PREDICTIVE CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE AIR PATH CONTROL - A rate based model predictive controller and method for air path control for a diesel engine regulates intake manifold pressure (MAP) and EGR valve flow rate to specified set points by coordinated control of a variable geometry turbine (VGT) and EGR valve position. A decay and a flexible Lyapunov function is enforced on the rate based model predictive controller for a single step prediction and control arisen. | 06-26-2014 |
20140196702 | Ignition and Knock Tolerance in Internal Combustion Engine by Controlling EGR Composition - A method for improving ignition of a spark ignited internal combustion engine by controlling the composition of recirculated exhaust gas. It is assumed that the engine has a spark ignition system and an exhaust gas recirculation (EGR) loop such that at least one of the combustion cylinders is an EGR cylinder that generates an EGR stream carried by the EGR loop. Thus, the combustion charge is a mixture of air, fuel and recirculated exhaust. A first step is receiving combustibility data representing the current ignitability of the charge. It is then determined whether the energy of the ignition system is sufficient to ignite the charge. If not, the amount of hydrogen in the EGR stream is increased, which increases the ignitability of the charge. | 07-17-2014 |
20140196703 | DEVICES AND METHODS FOR EXHAUST GAS RECIRCULATION OPERATION OF AN ENGINE - An engine is provided that includes an exhaust gas recirculation (EGR) conduit in fluidic communication with a first exhaust valve in a cylinder and an intake system, an exhaust conduit in fluidic communication with a second exhaust valve in the cylinder and an emission control device. During operation with the first valve active and the second valve deactivated, a fixed EGR level can be provided. However, during operation with the first valve deactivated and the second valve active, increased engine output can be achieved with reduced EGR without requiring additional exhaust throttling or switching valves. | 07-17-2014 |
20140202435 | LOW-PRESSURE EGR CONTROL DURING COMPRESSOR BYPASS VALVE OPERATION - A turbocharged engine system including a low-pressure exhaust gas recirculation (EGR) system and an intake oxygen sensor is described, along with methods for its operation. The system includes a compressor bypass valve arranged in a passage bypassing a turbocharger compressor, and an EGR valve arranged in an EGR system which may be adjusted to adjust an amount of exhaust gas recirculated to the engine intake. In one example method, over-dilution of an engine intake charge may be reduced by reducing EGR upon opening of the compressor bypass valve, and then increasing the EGR only after measurements from an intake oxygen sensor indicate that intake air dilution has decreased below a threshold. | 07-24-2014 |
20140202436 | METHOD FOR SETTING SENSOR OUTPUT - A valve is configured to control an opening in a passage. A valve angle sensor is configured to send an electric signal according to a rotation angle of the valve. In a storing process, an actual measurement value of a valve angle at a mechanical full open position is stored as an actual full open valve angle. In a first setting process, a first output value at a mechanical full close position is set. In a second setting process, a second output value at the stored actual full open valve angle is set. The output characteristic is set as an angle to output value relation according to the first output value and the second output value. | 07-24-2014 |
20140238364 | Method to Enhance Gas Recirculation in Turbocharged Diesel Engines - An apparatus for improving exhaust gas recirculation performance is provided which induces improved exhaust gas recirculation flow during engine operating transients, including transients in which exhaust gas flow conditions are unfavorable. The apparatus includes a fresh air intake passage with a venturi section and an exhaust gas recirculation passage outlet, preferably in the form of a pitot tube, arranged in the fresh air intake passage adjacent to the venturi section such that a pressure-reducing flow in the fresh air is induced as a result of the Coand{hacek over (a)} effect. Establishing Coand{hacek over (a)} flow adjacent to the exhaust gas recirculation outlet substantially assists in drawing exhaust gas into the fresh air intake flow in transient operating conditions, including unfavorable exhaust-to-intake pressure difference conditions. The Coand{hacek over (a)} flow also assists in more rapid and thorough mixing the gases to provide a homogeneous mixture to minimize NOx production during engine operating transients. | 08-28-2014 |
20140261343 | INTRUSIVE EGR MONITOR FOR A HYBRID VEHICLE - A system and method for controlling an exhaust gas recirculation (EGR) system in a hybrid vehicle using an intrusive monitor include adjusting EGR flow through an EGR valve based on an average pressure difference between pressure measured from a manifold absolute pressure (MAP) sensor and inferred pressure determined from mass air flow (MAF) into an intake of an engine when engine speed, throttle and camshaft timing position change is below a corresponding threshold. The measured pressure and inferred pressure are determined when the EGR valve is in a closed position and an open position. | 09-18-2014 |
20140305416 | Internal Combustion Engine Having Dual EGR Loops (Dedicated EGR Loop and Low Pressure EGR Loop) and Dual Cylinder Intake Ports - A dual EGR loop exhaust gas recirculation (EGR) system for an internal combustion engine. The engine has both a dedicated EGR loop and a low pressure EGR loop. This means that one or more engine cylinders is operable as a dedicated EGR cylinder, such that all of its exhaust is recirculated via the dedicated EGR loop. The other cylinders are operable as main cylinders having two intake ports, such that each main cylinder may receive a mixture of fresh air and dedicated EGR through one intake port and a mixture of fresh air and low pressure EGR through the other intake port. A control unit controls this dual loop EGR system to either provide EGR only from the dedicated EGR loop or to also provide additional EGR from the low pressure EGR loop. | 10-16-2014 |
20140352672 | EXHAUST SYSTEM HAVING EGR THROUGH COMPRESSION VALVE - An exhaust system is disclosed for use with an engine. The exhaust system may have a compression relief valve associated with an engine cylinder. The exhaust system may also have an exhaust gas recirculation passage extending from the compression relief valve to an intake of the engine cylinder. | 12-04-2014 |
20140373820 | METHOD AND SYSTEM ADJUSTING AN EXHAUST HEAT RECOVERY VALVE - A method for adjusting an exhaust heat recovery valve is presented. In one embodiment, the method may control an amount of boost provided by a turbocharger to an engine. | 12-25-2014 |
20150027420 | EXHAUST GAS FEED DEVICE FOR AN INTERNAL COMBUSTION ENGINE - An exhaust gas feed device for an internal combustion engine includes an exhaust gas recirculation duct comprising an end, an outlet, and an outflow cross-section. An air intake duct opens into the exhaust gas recirculation duct. A flow-guiding element is arranged in and at the end of the exhaust gas recirculation duct. An exhaust gas recirculation valve comprises a regulator body. The regulator body is configured to control the outflow cross-section. A valve seat is arranged at the outlet at the end of the exhaust gas recirculation duct in which the flow-guiding element is arranged. The valve seat is configured to limit the outflow cross-section of the exhaust gas recirculation duct. | 01-29-2015 |
20150027421 | FLOW RATE CONTROLLER OF INTERNAL COMBUSTION ENGINE - A flow rate controller of an internal combustion engine includes a flow rate change section configured by including an EGR valve, a bypass valve, and a diesel throttle, as the flow rate change section capable of changing at least one of a flow rate of exhaust gas that is recirculated to an intake system from an exhaust system of an internal combustion engine via an EGR passage and a flow rate of fresh air that flows into the internal combustion engine. In addition, an ECU is included to realize: an arrival position determining section for determining an arrival position of condensed water in the EGR passage that is moved by the EGR at least either at the time of acceleration or at the time of deceleration of the internal combustion engine; and a control section for controlling the flow rate change section on the basis of the arrival position determined by the arrival position determining section. | 01-29-2015 |
20150053186 | LEARNING OF EGR VALVE LIFT AND EGR VALVE FLOW TRANSFER FUNCTION - Methods and systems are provided for improving accuracy of delta pressure over valve (DPOV) based EGR flow measurement during low valve lift conditions by learning errors in EGR valve lift and/or EGR valve flow transfer function. | 02-26-2015 |
20150068503 | COMPRESSOR COVER WITH INTEGRATED EGR VALVE - A compressor assembly pressurizes an airflow that is received from the ambient for delivery to an internal combustion engine having a cylinder block section and a cylinder head section. The cylinder head section is configured to supply an air-fuel mixture to the cylinder for combustion therein and exhaust post-combustion gases therefrom. The compressor assembly includes a compressor cover configured to receive the airflow from the ambient and a compressor wheel disposed inside the compressor cover and configured to pressurize the airflow. The compressor assembly also includes an exhaust gas recirculation (EGR) valve that is incorporated into the compressor cover and is in fluid communication with each of the cylinder head section and the compressor wheel. The EGR valve is configured to control delivery of the exhaust post-combustion gases from the cylinder head into the compressor cover. An internal combustion engine employing such a compressor assembly is also disclosed. | 03-12-2015 |
20150101580 | SYSTEM AND METHOD FOR CONTROL OF EXHAUST GAS RECIRCULATION (EGR) UTILIZING PROCESS TEMPERATURES - A system includes a reciprocating internal combustion engine with one or more reaction zones configured to receive a charge flow that is configured to react within the one or more reaction zones, thereby forming an exhaust gas flow, and a controller. The charge flow includes an oxidant flow, a fuel flow, and a recirculated portion of the exhaust gas flow. The controller is configured to control a ratio of the recirculated portion of the exhaust gas flow to a fuel mixture. The controller controls the ratio based at least in part on a first temperature, a second temperature of the charge flow, and a third temperature of the recirculated portion of the exhaust gas flow. The fuel mixture includes the oxidant flow and the fuel flow. The first temperature includes one or any combination of a sensed temperature of the oxidant flow, the fuel flow, or the fuel mixture. | 04-16-2015 |
20150101581 | METHOD OF CONTROLLING THE PRESSURE OF A TURBOCHARGER - A method and apparatus for controlling a boost pressure of a turbocharger is provided. The turbocharger includes a waste gate valve and a waste gate actuator. When the internal combustion engine operates under cold temperature conditions, a steady state temperature of the waste gate actuator is determined and a corrected temperature of the waste gate actuator is estimated as a function of the thermal convection between ambient air and the waste gate actuator. A corrected value of the duty cycle of a pulse width modulated signal is estimated as a function of said corrected temperature and the duty cycle corrected value is used to control the boost pressure of the turbocharger. | 04-16-2015 |
20150114367 | INTERNAL COMBUSTION ENGINE CONTROL APPARATUS - There is provided an internal combustion engine control apparatus that can more accurately calculate a volume efficiency correction coefficient and can more accurately estimate the amount of air that flows into a cylinder and the external exhaust gas recirculation amount. In an internal combustion engine provided with an exhaust gas recirculation apparatus including an exhaust gas recirculation valve and an exhaust gas recirculation path, based on a cylinder flow rate, an exhaust gas recirculation amount, an inner-intake-pipe density, and an inner-intake-pipe density changing amount, a volume efficiency correction coefficient, as a volume efficiency corresponding value, is calculated; then, by use of the calculated volume efficiency correction coefficient, a cylinder intake air amount and a recirculation amount of exhaust gas that is taken into the cylinder are calculated. | 04-30-2015 |
20150322900 | INTERNAL COMBUSTION ENGINE CONTROL APPARATUS - An internal combustion engine control apparatus is provided that can prevent the operation of an internal combustion engine from becoming unstable even when the ignition apparatus fails, that can prevent the components of the exhaust gas from being deteriorated, and that can suppress the exhaust amount of environmental load substances from increasing. A diagnosis unit is provided that determines whether or not an energy supply unit is normally supplying energy to a conductive path formed in the gap of an ignition plug; a control unit controls an EGR unit in accordance with the result of a diagnosis by the diagnosis unit so as to control the amount of burned gas to be recirculated to the internal combustion engine. | 11-12-2015 |
20150345415 | METHOD AND APPARATUS FOR CONTROLLING EGR - A method of controlling exhaust gas recirculation (EGR) for controlling recirculation of exhaust gas discharged from a combustion chamber of an engine includes: a data obtaining operation of obtaining data about an engine state and a gas supply state; a current EGR rate calculating operation of calculating a current EGR rate of supply gas based on the data; a demand EGR rate setting operation of setting a demand EGR rate matched with the data in a pre-made target EGR rate map; an error calculating operation of calculating a difference between the demand EGR rate and the current EGR rate; and a control operation of making the current EGR rate follow the demand EGR rate by changing a recirculation rate of the exhaust gas by adjusting an inhalation side pressure of the supply gas according to the difference. | 12-03-2015 |
20150354482 | SYSTEMS AND METHODS FOR DEDICATED EGR CYLINDER VALVE CONTROL - Systems and methods for improving combustion in a highly exhaust gas diluted engine are disclosed. The methods and systems may be provided in an engine that includes independent control of cylinder valves with respect to other cylinder valves. | 12-10-2015 |
20160061151 | CONTINUOUS ADAPTATION OF AN INTAKE OXYGEN SENSOR FOR PRESSURE, HUMIDITY AND AGING - A technique is provided for compensating an untrimmed oxygen (O | 03-03-2016 |
20160084178 | CONTROL DEVICE OF ENGINE WITH TURBOCHARGER AND METHOD OF CONTROLLING THE ENGINE - A control device of an engine including an exhaust gas turbocharger having an exhaust driven turbine with a turbine wheel and a compressor wheel includes an electronic control unit configured to set a target output torque based on a required value of an output torque for the engine, regulate the output torque of the engine to the target output torque, and limit an increase of an actual output torque of the engine from a timing at which a rate of increase of the actual output torque exceeds a predetermined value, when the target output torque is larger by at least a predetermined amount than the actual output torque and the rate of increase of the actual output torque is equal to or smaller than the predetermined value. | 03-24-2016 |
20160084181 | METHOD AND SYSTEMS FOR EGR CONTROL - Various methods and systems are provided for estimating fresh intake air flow. In one example, a system comprises an engine having an intake manifold to receive fresh intake air and an exhaust gas recirculation (EGR) system to supply EGR to the intake manifold, where flow of EGR through the EGR system is controlled by one or more exhaust valves. The system further includes a controller configured to adjust a position of the one or more exhaust valves based on an estimated fresh intake air flow rate, where during a first set of operating conditions, the fresh intake air flow rate is estimated based on a total gas flow rate into the engine and further based on a current position of the one or more exhaust valves, intake manifold pressure, air-fuel ratio, and fuel flow to one or more cylinders of the engine. | 03-24-2016 |
20160084206 | DIESEL ENGINE AND METHOD OF CONTROLLING SAME - An exhaust gas recirculation controller that, closes an exhaust gas recirculation valve to stop exhaust gas recirculation, when an engine is accelerating, and when an increased amount of a fuel injection amount detected by a fuel injection detector is larger than a preset first threshold value, a boost pressure detected by a boost pressure detector is lower than a preset second threshold value, and an engine operation state detected by an engine operation state detector is outside a preset high rotation and high load operation state region. An exhaust gas amount flowing into a turbocharger can be confined within a proper range when accelerating a diesel engine, which avoids a rotational speed of the turbocharger from exceeding an allowable rotational speed. | 03-24-2016 |
20160102636 | SYSTEMS AND METHODS FOR TRANSIENT CONTROL - Methods and systems are provided for reducing torque transients experienced when a dedicated EGR cylinder is transitioned in to or out of dedicated EGR mode. During a transition, each of an intake throttle and a wastegate is adjusted in opposing directions. Throttle and wastegate adjustments are coordinated with adjustments to spark timing and intake cam timing to provide sufficient torque reserve for the transition. | 04-14-2016 |
20160108858 | CONTROL APPARATUS AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - An ECU opens/closes an EGR valve ( | 04-21-2016 |
20160146136 | SYSTEMS AND METHODS FOR LP-EGR DELIVERY IN A VARIABLE DISPLACEMENT ENGINE - Methods and systems are provided for controlling LP-EGR flow in a variable displacement engine. In one example, a method may include providing a higher fixed LP-EGR percentage relative to a total intake air flow during a VDE mode, and providing a lower fixed EGR percentage relative to the total intake air flow during a non-VDE mode. Further, during a tip-out when operating in the VDE mode at a load below a threshold, transitioning out of the VDE mode after transitioning the LP-EGR from the higher fixed percentage to the lower fixed percentage. | 05-26-2016 |
20160153378 | METHOD FOR CONTROLLING EXHAUST GAS RECIRCULATION SYSTEM FOR ENGINE | 06-02-2016 |