Entries |
Document | Title | Date |
20080208439 | Dual injection type internal combustion engine - A dual injection type internal combustion engine including an injector for in-cylinder injection and an injector for intake manifold injection includes a learning device for learning a background noise level based on an output signal of a knock sensor, and a knocking suppression control device for performing, while learning the background noise level, knocking suppression control by controlling fuel injection of the injector for in-cylinder injection or the injector for intake manifold injection. Alternatively, the engine includes a fixing device for fixing, while learning the background noise level, a start timing or end timing of fuel injection by the injector for in-cylinder injection at a basic timing determined by an operating state of the engine. | 08-28-2008 |
20080228380 | Internal Combustion Engine for Operation with Two Different Knock Resistant Fuels - The invention relates to an internal combustion engine which can be operated with at least two fuels that have different knock resistance and which comprises at least one cylinder in which combustion of the fuel takes place cyclically. Said engine is provided with a dosing system for feeding a controlled quantity of fuel to the cylinder in every cycle. The dosing system is designed in such a manner that, when fuels are used that are less resistant to knocking, the quantity of air-fuel mixture supplied is maintained below a threshold quantity at which there is no danger of knocking. | 09-18-2008 |
20080228381 | Apparatus and Method For Controlling Knock in an Internal Combustion Engine - A knock control apparatus for an engine includes: a first determination device that determines whether the engine is knocking based on an output signal of a knocking detector provided in the engine; a controller that retards an ignition timing of the engine when the first determination device determines that the engine is knocking; and a second determination device that confirms whether the engine is knocking based on an output torque of the engine that is obtained when the controller retards the ignition timing. | 09-18-2008 |
20080228382 | ENGINE OUTPUT CONTROL SYSTEM AND METHOD - A system for an engine, comprising a cylinder located in the engine, a turbocharger coupled to the engine, a first injector for injecting a first fuel into said cylinder, wherein said first injector is a direct cylinder injector where said direct cylinder injector delivers a liquid including an alcohol, a second injector for injecting a second fuel into said cylinder, wherein said second injector is a port injector, where said port injector delivers a liquid including gasoline, a catalytic device configured to receive exhaust gases produced by at least the cylinder, and a controller configured to vary an amount of said first and second fuel injection during engine operation based on operating conditions, where amounts of variation of said first and second fuels are set to maintain a substantially stoichiometric mixture, the controller further configured to increase a relative amount of injection of the second injector in response to an indication of engine knock during a first operating condition, decrease engine boosting in response to the indication of engine knock during a second condition; and retard ignition timing in response the indication of engine knock during a third condition. | 09-18-2008 |
20080234918 | KNOCKING STATE DETERMINATION DEVICE - An engine ECU executes a program including the steps of: calculating a correlation coefficient K based on the result of comparing a vibration waveform of an engine and a knock waveform model stored previously; calculating a magnitude value LOG(V) from the magnitude V detected based on a signal transmitted from a knock sensor; creating frequency distribution of magnitude values LOG(V) by using magnitude values LOG(V) in an ignition cycle in which the correlation coefficient K larger than a threshold K( | 09-25-2008 |
20080243364 | Neural network-based engine misfire detection systems and methods - Methods and systems for detecting misfire events in a multicylinder engine are disclosed. One method includes associating a neural network with a cylinder of a multicylinder engine. The method also includes inputting to the neural network a plurality of crankshaft parameters. The method further includes determining the existence of an engine misfire in the cylinder based on the output of the neural network. | 10-02-2008 |
20080262705 | Internal Combustion Engine Knock Determination Device and Knock Determination Method - An engine ECU executes: calculating 15-degrees integrated value integrating vibration intensity for each of six crank angle ranges; detecting an amount of change in the 15-degrees integrated value between ignition cycles; specifying two ranges having larger amounts of change; specifying a crank angle having intensity larger than that of a neighboring crank angle in a search range determined to be the same as the specified ranges; calculating a coefficient of correlation K corresponding to a difference between a vibration waveform and a knock waveform model while the specified crank angle is matched with a timing at which intensity peaks in the knock waveform model; and, if the coefficient of correlation K is larger than a threshold value K( | 10-23-2008 |
20080281504 | KNOCK CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A knock control apparatus for an internal combustion engine can avoid an incorrect knock determination thereby to prevent output power reduction and suppress knocks occurring in succession. A knock detection section outputs a knock detection signal based on an ionic current, and a threshold setting section sets a knock determination threshold. A knock determination section determines the occurrence of a knock based on the threshold and the knock detection signal. A required correction amount setting section sets a required correction amount for ignition timing based on a knock determination result, and a control parameter correction section corrects ignition timing based on the required correction amount. A noise determination section determines the occurrence of noise based on whether said knock detection signal or said control parameter correction amount is within a set level range, and a noise removal period setting section sets a noise removal period based on the noise determination result. | 11-13-2008 |
20080294328 | Internal Combustion Engine Knock Determination Device and Knock Determination Method - An engine ECU executes a program including: the step (S | 11-27-2008 |
20080306677 | KNOCKING STATE DETERMINATION DEVICE - An engine ECU executes a program including a step of calculating intensity values LOG(V) based on signals transmitted from a knock sensor; a step of deciding a maximum value V(MAX) in frequency distribution of intensity values LOG(V) for N cycles (N is a natural number); a step of calculating a knock determination level V(KD) based on the frequency distribution; a step of, when the knock determination level V(KD) is smaller than the maximum value V(MAX), removing V(MAX) from the frequency distribution; and a step of counting the total frequency of removed maximum values V(MAX) as knock occupancy KC. Maximum values V(MAX) are removed until the knock determination level V(KD) and the maximum value V(MAX) coincide, and the knock determination level V(KD) is recalculated. | 12-11-2008 |
20080312810 | Controller for internal combustion engine - The alcohol concentration detection value estimated or detected by the alcohol concentration sensor is corrected in accordance with intensity, frequency and the like of knocking to set the alcohol concentration detection value after the correction as the alcohol concentration for ignition timing control. Thereby, occurrence of the knocking can be prevented by changing ignition timing in accordance with the knocking state. In regard to the fuel injection control, the alcohol concentration detection value before the correction is used as the alcohol concentration for fuel injection control as it is without using the alcohol concentration detection value corrected in accordance with the knocking state. This prevents a fluctuation of the fuel injection quantity due to correcting the alcohol concentration detection value in accordance with the knocking state, leading to prevention of a torque fluctuation or combustion deterioration. | 12-18-2008 |
20090005956 | Knocking Determination Device and Knocking Determination Method of Internal Combustion Engine - An engine ECU executes a program including a step of setting a search range of the crank angle of a peak value P that is the largest integrated value in a vibration waveform of an engine detected by calculating integrated values that are integrals of output voltage values of a knock sensor for every five degrees of a crank angle such that the search range may include the crank angle increasing with increase in engine speed NE, and a step of detecting the crank angle of the largest integrated value in the search range, and setting the detected crank angle as the crank angle of peak value P in the vibration waveform. At the crank angle based on the crank angle of peak value P, the vibration waveform is compared with a knock waveform model. | 01-01-2009 |
20090030593 | Method for Real-Time Estimation of Engine Combustion Parameters from Vibratory Signals - The invention relates to a method having application to combustion control of an internal-combustion engine for real-time estimation of engine combustion parameters from vibratory signals. A vibratory signal representative of the engine vibrations is continuously acquired as a function of the crank angle, from a vibration detector. Real-time filtering of this vibratory signal and real-time estimation of the Fourier decomposition coefficients for the acquired vibratory signal is carried out by inverting the dynamics of the filter which is used. Finally, real-time estimation of combustion parameters allowing the combustion to be qualified is carried out from these coefficients. | 01-29-2009 |
20090043484 | METHOD AND DEVICE FOR CONTROL IGNITION TIMING THROUGH KNOCK CONTROL IN AN INTERNAL COMBUSTION ENGINE - An engine ECU executes a program including: determining whether or not a condition for stopping knocking determination is satisfied; setting a flag of stopping correction of a determination value to “ON”; calculating a knock determination level based on the extracted magnitude value; and when the correction stop flag is not “ON”, decreasing or increasing the determination value in accordance with a knock proportion KC that is a proportion of magnitude values greater than the knock determination level. The knock determination level is calculated even when the correction stop flag is “ON”. | 02-12-2009 |
20090063024 | MISFIRE DETECTION APPARATUS FOR INTERNAL COMBUSTION ENGINE - In an internal combustion engine including a flywheel damper, an operation range in which misfire detection is affected by the flywheel damper is set in advance. Whether or not an operation state of the internal combustion engine is within an operation range affected by the flywheel damper is determined. When the operation state is within the operation range affected by the flywheel damper, for example a cylinder specifying process specifying a misfiring cylinder is stopped. By such processing, erroneous detection attributed to irregular rotation fluctuation behavior caused by the flywheel damper can be avoided, and misfire detection performance can be improved. | 03-05-2009 |
20090063025 | METHOD AND DEVICES EQUIPPED WITH A HIGH-PASS FILTER FOR APPRAISAL OF THE KNOCKING IN EVERY CYLINDER OF AN INTERNAL COMBUSTION ENGINE - The invention relates to the field of methods and devices for evaluating the knocking inside every cylinder of an internal combustion engine by making advantageous use of the ionisation current generated during the combustion of the fuel in each cylinder of said engine. The invention develops over various phases, each of which is repeated continually for each cycle of said combustion engine and is characterised by the fact that ionisation current values are selected during determined lengths of time, and said values are entered in a high-pass filter, the values determined by said filter then being squared and the value Vd calculated, said value being the relation between the value of the sum of the squares of said values obtained by said filter and a known normalisation coefficient, thus generating the spark at the spark plug in each cylinder on the basis of said value Vd. | 03-05-2009 |
20090063026 | Method and device for reducing vibrations during the shutdown or startup of engines, in particular internal combustion engines - A method and a device for reducing vibrations during the shutdown or startup of an engine, in particular an internal combustion engine, in which the vibration behavior of the engine is determined at least during shutdown and/or startup, a control signal is applied to at least one engine mounting whose damping properties are settable via the control signal, and the control signal is calculated in such a way that a vibration behavior of the engine materializes according to a setpoint vibration behavior in which vibrations are introduced, for example into a passenger compartment, at a level which lies below a predefined threshold value. | 03-05-2009 |
20090070017 | METHOD TO DETERMINE A FUEL COMPOSITION - The invention deals with a method to determine the fuel composition of a fuel mixture from a first fuel and a second fuel for the operation of an internal combustion engine, wherein the first and the second fuel have different octane numbers and wherein the internal combustion engine has at least one knock sensor and a closed-loop knock control. Provision is made according to the invention for the composition of the fuel mixture to be determined by means of an output signal of the knock sensor. Provision is made in many cases for the knock sensor to already be in the internal combustion engine, so that it does not present any additional expenditure of money or effort. Because the octane number of the fuel mixture is determined by the mixing ratio of the fuels involved, which have different octane numbers, in retrospect the composition of the fuel mixture can be suggested from the signal of the knock sensor under suitable operating conditions. | 03-12-2009 |
20090088956 | ROBUST ONBOARD DIAGNOSTIC MISFIRE DETECTION - A misfire detection system and method for onboard diagnosis of engine performance detects an engine speed as a function of a rotational angle of the crankshaft, and determines crankshaft acceleration as a function of this angle based on the detected engine speed. In this manner, the power stroke acceleration of each cylinder is determined and ranked. After excluding the greatest acceleration, the accelerations of a group of consecutively ordered cylinders including the second greatest acceleration are averaged to produce an assessment level against which the remaining lower-ranked cylinders are evaluated to detect misfires. | 04-02-2009 |
20090088957 | Control apparatus for internal combustion engine and method for controlling the same - A knock determination unit is configured to determine whether the internal combustion engine causes knocking. A knock control unit is configured to perform a knock control to correct an ignition timing on the basis of the determination. A water pump is configured to circulate cooling fluid of the internal combustion engine. A pump control unit is configured to perform a cooling control to control the water pump so as to further cool the internal combustion engine in a detection state, where the knock determination unit detects knocking, than in a non-detection state where the knock determination unit does not detect knocking. | 04-02-2009 |
20090093951 | Method for determination of Covariance of Indicated Mean Effective Pressure from crankshaft misfire acceleration - A method for determining Covariance of Indicated Mean Effective Pressure (COVIMEP) using already-available crankshaft-based measurements that correlate with COVIMEP. Correlated values of COVIMEP are stored as lookup tables in an Engine Control Module for use in continuously determining COVIMEP during engine operation. COVIMEP thus calculated may be used in known fashion as a real time control algorithm variable for such engine control parameters as fueling rate, spark angle advance, exhaust gas recirculation flow, and camshaft phaser advance angle or other engine parameters. | 04-09-2009 |
20090112449 | Method of controlling an internal combustion engine, in particular a diesel engine - In a method for controlling an internal combustion engine, in particular a diesel internal combustion engine, at least one variable is formed on a cylinder-specific basis, which variable characterizes a respective profile of a combustion in an associated combustion chamber, and the control of cylinder-specific fuel injection parameters is influenced as a function of said at least one variable which characterizes the combustion profile. | 04-30-2009 |
20090112450 | Fuel Management System for Refueling a Fuel System for Improved Fuel Efficiency Utilizing Glycols - A fuel management system of a vehicle and a refueling system for gasoline stations to handle a fuel system for improved fuel efficiency which can be contained in a fuel tank having a gasoline phase comprises gasoline or gasohol; and an anti-knock phase comprising an anti-knock agent comprising a glycol anti-knock subagent, water and one or more of a second anti-knock subagent selected from the group of methanol, ethanol and mixtures thereof, such that the anti-knock agent phase is substantially immiscible with the gasoline phase. | 04-30-2009 |
20090118989 | Knock signal detection in automotive systems - In an automotive system ( | 05-07-2009 |
20090118990 | Internal Combustion Engine System and Misfire Determining Method for Internal Combustion Engine - An influence component N | 05-07-2009 |
20090150058 | KNOCK DETERMINATION DEVICE AND METHOD FOR INTERNAL COMBUSTION ENGINE - An engine ECU executes a program including the steps of: calculating a coefficient of correlation K in accordance with a result of comparing a waveform of a vibration of a frequency band including a resonance frequency of an engine with a knock waveform model previously created as a waveform of a vibration caused when the engine knocks (S | 06-11-2009 |
20090177371 | COMPONENT VIBRATION BASED CYLINDER DEACTIVATION CONTROL SYSTEM AND METHOD - A method of changing an active cylinder count of an engine may include determining a vehicle vibration limit and a vehicle vibration level. The cylinder count may be modified (increased or decreased) based upon the vehicle vibration limit and the vehicle vibration level. The vehicle vibration limit may be based upon a vehicle speed, and a coolant temperature of the engine. The vehicle vibration level may be based upon at least one of a desired torque of the engine and a number of active cylinders of the engine. According to other features, the vehicle vibration level may be based upon a measured vibration level of a vehicle component. | 07-09-2009 |
20090210139 | Self-Tuning Active Engine Mount for Vehicles with Active Fuel Management Engine - An active engine mount assembly for counteracting resultant forces in active fuel management systems, wherein resultant forces are transmitted to a frame of a motorized vehicle generated by the deactivation of at least one cylinder in an internal combustion engine. The active engine mount assembly is fluidly connected to a hydraulic circuit. The hydraulic circuit is operatively connected to an engine crankshaft and operable to actively generate pressure pulses having frequencies self-synchronized with the rotational speed of the crankshaft. | 08-20-2009 |
20090240423 | MISFIRE DETECTING DEVICE FOR WATER JET PROPULSION WATERCRAFT - A misfire detecting device is provided for a water jet propulsion watercraft in which a propulsion unit operates through an operation of an engine to propel the water jet propulsion watercraft. The misfire detecting device includes injectors arranged to inject fuel into the engine under a fuel injection amount adjusting control implemented by an electric control device, ignition plugs arranged to ignite the fuel injected into the engine from the injectors to operate the engine, an oxygen sensor arranged to detect that a misfire occurs in the engine, a warning lamp and buzzer arranged to inform that the misfire occurs, etc. The misfire detecting device prevents the warning lamp and the buzzer from informing the warning if the misfire is caused through the control by the electric control device. Accordingly, the misfire detecting device for a water jet propulsion watercraft ensures that an operator cannot mistake a misfire caused under a control for a misfire caused due to an abnormality of an engine or other components thereof. | 09-24-2009 |
20090276147 | ENGINE KNOCK DIAGNOSTIC - A knock diagnostic module having a knock module that increments a sample count when a cylinder firing signal corresponding to a first cylinder is received and selectively increments a knock count based on a knock detection signal that corresponds to the cylinder firing signal of the first cylinder A knock analysis module analyzes the knock count of the first cylinder when the sample count of the first cylinder reaches a predetermined value and selectively generates an excessive knock signal when the knock count exceeds a predetermined threshold. A remedial action module selectively performs a remedial action based on the excessive knock signal. | 11-05-2009 |
20090281713 | CYLINDER-BY-CYLINDER BALANCING OF COMBUSTION TIMING IN HCCI ENGINES - Various systems and methods are described for controlling fuel injection to a plurality of cylinders. One example method comprises during combustion timing imbalances among a plurality of cylinders carrying out homogeneous charge compression ignition combustion, adjusting a fuel injection amount in a first cylinder to adjust a combustion timing of the first cylinder in a first direction, and correspondingly adjusting a fuel injection amount in a second cylinder in a second direction to maintain average engine torque and reduce the imbalance. | 11-12-2009 |
20090287398 | INTERNAL-COMBUSTION-ENGINE CONTROL APPARATUS - Provision is made for an internal-combustion-engine control apparatus whose knocking detectability is high regardless of the type of an engine. Preparation is made for a data group consisting of serial segments each including a predetermined number of values obtained by A/D-converting a signal that appears within a knocking detection window and a data group consisting of serial segments each including the predetermined number of values, the starting timing of each serial segment in the latter data group being shifted from that of each serial segment in the former data group; a time-frequency analysis is applied to the data groups in a plurality of frequency bandwidths; the peak values and the integration values of spectrums, within the knocking detection window, outputted after the time-frequency analysis in each of the plurality of frequency bandwidths are calculated; a P/H method in which knocking determination is performed based on the peak value in each of the frequency bandwidths and an integration method in which knocking determination is performed based on the integration value in each of the frequency bandwidths can be performed; and in the case where knocking is detected through at least one of the P/H method and the integration method, the ignition timing is delayed in order to avoid the knocking. | 11-19-2009 |
20090312939 | ENGINE CONTROL APPARATUS INCLUDING COMPUTING SECTION AND A/D CONVERTING SECTION - The engine control apparatus includes a computing section which performs computation for engine control in synchronization with rotation of an engine, and an A/D converter which A/D-converts an analog signal necessary for the computing section to perform the computation, the analog signal being outputted from an external device such as a knock sensor. The computing section and the A/D converter are configured to enable detection of garble in the data transmitted from the A/D converter to the computing section on the side of the computing section without affecting the operation of the A/D converter. | 12-17-2009 |
20090319160 | ACTIVE EXHAUST VALVE CONTROL STRATEGY FOR IMPROVED FUEL CONSUMPTION - A control system for an exhaust valve and a method of actively controlling an exhaust valve includes monitoring at least a first engine characteristic, a second engine characteristic, and at least one additional noise determining characteristic. An exhaust valve position is then adjusted based on the first engine characteristic, the second engine characteristic, and the at least one additional noise determining characteristic to improve fuel economy without adversely affecting noise levels. | 12-24-2009 |
20090326789 | METHOD FOR REDUCING MISFIRE IN AN INTERNAL COMBUSTION ENGINE - The present invention is a method for reducing misfire in a cylinder of an internal combustion engine. The method includes detecting a misfire event frequency that is equal to or greater than a first predetermined value, determining a pulse-width signal for a fuel injector associated with the cylinder during the misfire event, increasing the pulse-width signal if the misfire event is frequency is below a second predetermined value, and reducing the increase in the pulse-width signal if the misfire event frequency is below the first predetermined value. | 12-31-2009 |
20100017101 | VEHICLE SURGE AND SPARK TIMING CONTROL - A method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting spark timing in the combustion chamber of the engine in response to a knock indication, and further adjusting spark timing in response to the vehicle acceleration to reduce surge. | 01-21-2010 |
20100030455 | INTERNAL COMBUSTION ENGINE SYSTEM, VEHICLE HAVING THE INTERNAL COMBUSTION ENGINE SYSTEM, AND ENGINE MISFIRE DETECTION METHOD FOR INTERNAL COMBUSTION ENGINE - The internal combustion engine system makes detection on the occurrence or the non-occurrence of a misfire by comparing the 240-degree difference TD240 of the 30-degree rotation time T30 (CA) with the tentative detection reference value A | 02-04-2010 |
20100063711 | METHOD AND DEVICE FOR CONTROLLING THE OPERATING MODE OF AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for controlling the operating mode of an internal combustion engine ( | 03-11-2010 |
20100063712 | SINGLE NOZZLE DIRECT INJECTION SYSTEM FOR RAPIDLY VARIABLE GASOLINE/ANTI-KNOCK AGENT MIXTURES - Engine management system for operation of a direct injection spark ignition gasoline engine. The system includes a gasoline engine, a source of gasoline and a source of an anti-knock agent. Gasoline and anti-knock agent are introduced into a proportioning valve that delivers a selected mixture of gasoline/anti-knock agent to a high pressure pump. At least one injector receives the selected mixture from the high pressure pump and delivers the mixture into a cylinder of the engine. The engine management system provides a rapidly variable mixture of directly injected anti-knock agent and gasoline which prevents knock as the engine torque increases. | 03-11-2010 |
20100094528 | ABNORMAL COMBUSTION DETECTION METHOD FOR INTERNAL-COMBUSTION ENGINES - The invention is an abnormal combustion detection method for spark-ignition internal-combustion engines. For each engine cycle, a parameter characterizing a distribution of N combustion indicator values, CA10 for example, acquired over N cycles preceding the cycle in progress, is determined while ignoring extreme values. A threshold is defined from this parameter for the combustion indicator. The start of an abnormal combustion is then detected by comparing the combustion indicator with this threshold and the course of the abnormal combustion detected in the combustion chamber is controlled. | 04-15-2010 |
20100106392 | DEVICE AND METHOD FOR PROCESSING KNOCK SIGNALS OF AN INTERNAL COMBUSTION ENGINE, WITH REDUCED INFLUENCE OF INTERFERING NOISE - A device dedicated to processing analog knock signals delivered by a sensor of an internal combustion engine coupled to an engine monitoring unit, includes processing elements for converting values of the analog signals acquired by the sensor at known instants into representative digital samples, then for temporarily storing the samples whose acquisition instants are contained in a chosen time window, and for applying chosen digital processing operations to these stored samples so as to deliver a digital output signal representative of the knock of the engine during this time window. The processing elements are responsible i) for applying a chosen digital preprocessing operation to the stored samples whose acquisition instants coincide with instants of occurrence, and ii) for adapting at least one of the digital processing operations according to the number of stored samples that are the subjects of a coincidence. | 04-29-2010 |
20100106393 | METHOD OF MICROPHONE SIGNAL CONTROLLING AN INTERNAL COMBUSTION ENGINE - A method of controlling an internal combustion engine having at least one cylinder defining a variable-volume combustion chamber; and a rotating crankshaft powered by a piston sliding inside the cylinder; the control method including the steps of: determining a recording window expressed in engine angle degrees and having a start engine angle and a stop engine angle; acquiring and memorizing the intensity of sound pressure waves, generated by the internal combustion engine as a function of an engine angle, by means of at least one sound pressure sensor and within the recording window; and estimating the value of at least one operating parameter of a part of the internal combustion engine by analysing the intensity of the sound pressure waves in the recording window. | 04-29-2010 |
20100114460 | Engine Misfire Detection Apparatus for Internal Combustion Engine and Engine Misfire Detection Method - The engine misfire detection process according to one aspect of the invention first makes tentative detection on the occurrence or the non-occurrence of an engine misfire in execution of both vibration control and rotation speed control. In response to the tentative detection of an engine misfire, the engine misfire detection process subsequently makes final detection on the occurrence or the non-occurrence of an engine misfire. In the event of no final detection of an engine misfire, the engine misfire detection process makes tentative detection and final detection on the occurrence or the non-occurrence of an engine misfire in prohibition of the vibration control. In the event of still no final detection of an engine misfire, the engine misfire detection process makes tentative detection and final detection on the occurrence or the non-occurrence of an engine misfire in further prohibition of the rotation speed control. Even in the event of no final detection of an engine misfire in execution of both the vibration control and the rotation speed control, the procedure of the invention makes final detection on the occurrence or the non-occurrence of an engine misfire in prohibition of execution of the vibration control and further the rotation speed control. This arrangement desirably increases the detection frequency of engine misfires. | 05-06-2010 |
20100121559 | Water Based Systems for Direct Injection Knock Prevention in Spark Ignition Engines - A fuel management system for using water for on-board vehicular separation of ethanol from ethanol-gasoline blends is described. Water or a water-alcohol mixture from a secondary tank is mixed with the ethanol-gasoline blend resulting in separation of the ethanol. By using on-board vehicular separation, the consumption of the externally supplied liquid from a secondary tank can be decreased to less than 1% of the gasoline consumption. This allows for long refilling periods for the externally supplied fluid. In another embodiment, a water-based fluid is directly injected into the cylinders of a spark ignition engine to eliminate knocking without causing misfire. In a further embodiment, an alcohol-based fluid is also used in those circumstances where injection of the water-based fluid may cause misfire. | 05-13-2010 |
20100168990 | Method and System for Knock Detection - This invention relates to a method for knock detection in a combustion engine, in which combustion is controlled by a control unit ( | 07-01-2010 |
20100168991 | DIAGNOSTIC SYSTEMS AND METHODS FOR ENGINE KNOCK SENSORS - An engine control system includes a digital signal processing (DSP) module that generates a fast Fourier transform (FFT) of an engine knock signal generated by an engine knock sensor. An intensity determination module determines an engine knock intensity based on one of a maximum of and an average of the FFT. A status determination module determines a status of the engine knock sensor based on the engine knock intensity, a plurality of predetermined knock intensity thresholds, and a rotational speed of an engine crankshaft. | 07-01-2010 |
20100174472 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A knock control apparatus includes: a knock sensor for detecting knock of an internal combustion engine; a signal processing section for calculating a knock intensity; and knock determination level setting sections: for calculating an average value of the knock intensity; for calculating, based on the average value, an overall variance of the knock intensity of an entirety of a frequency distribution, a higher variance of the knock intensity above the average value, and a lower variance of the knock intensity below the average value; for calculating a standard deviation of the knock intensity from the overall variance; for presetting a value allowing the frequency distribution of the knock intensity to be a predetermined confidence interval as a confidence coefficient; and for setting a sum of the average value and a value obtained by multiplying the standard deviation by the corrected confidence coefficient as a knock determination level. | 07-08-2010 |
20100191445 | INDIVIDUAL CYLINDER FUEL MASS CORRECTION FACTOR FOR HIGH DRIVABILITY INDEX (HIDI) FUEL - A system includes a fuel detection module, a misfire detection module, and a fuel control module. The fuel detection module detects when a fuel supplied to an engine having C cylinders has a high drivability index (HIDI), where C is an integer greater than 1. The misfire detection module detects whether M of the C cylinders misfire when the fuel has the HIDI, where M is an integer, and 1≦M07-29-2010 | |
20100211296 | Method and apparatus for misfire detection - In a method of monitoring for a misfire event in an internal combustion engine signals representative of engine speed are monitored for successive engine revolutions subsequent to each firing event. The monitored signals are stored (e.g., in a buffer) and processed to detect changes in the monitored speed signals. Changes in monitored speed signals that are indicative of an actual misfire event are detected and a misfire count is changed in response thereto. | 08-19-2010 |
20100250104 | ACTIVE VIBRATION ISOLATING SUPPORT APPARATUS AND METHOD FOR CONTROLLING THE SAME - When a revolution speed of the engine (crankshaft) changes faster or slower, the vibration from the engine is propagated to an occupant in the vehicle, and the occupant may feel a sense of discomfort. For this reason, the present invention provides an active vibration isolating support apparatus and method for controlling the same to suppress the propagation of the vibration from the engine to the vehicle body so that the occupant may feel less sense of discomfort even if the revolution speed of the engine changes. | 09-30-2010 |
20100299051 | FUEL INJECTION AND COMBUSTION FAULT DIAGNOSTICS USING CYLINDER PRESSURE SENSOR - Systems and methods useful for detecting a combustion fault in a combustion engine include determining cylinder power density values for cylinders present on the engine during its operation and determining cylinder imbalance parameters for the cylinders, based on the cylinder power density values. The cylinder imbalance parameters are compared with a provided diagnostic threshold value. | 11-25-2010 |
20100305837 | System and Method for Damping Vibrations in a Motor Vehicle - An engine damping system is disclosed. The engine damping system includes an actuating device that is hydraulically powered using a power steering system of a motor vehicle. The system also includes a steering position sensor to determine a steering mode of the motor vehicle. The system also includes an acceleration sensor to provide controlled feedback for the actuating device. | 12-02-2010 |
20110066358 | PATTERN RECOGNITION FOR RANDOM MISFIRE - A control system includes a jerk determination module and a misfire confirmation module. The jerk determination module determines a jerk of a crankshaft associated with a firing event in an engine. The misfire confirmation module selectively confirms that a misfire detected in the engine is valid based on the jerk. | 03-17-2011 |
20110077846 | METHOD AND SYSTEM FOR ESTIMATING AND REDUCING ENGINE AUTO-IGNITION AND KNOCK - A control system for an engine includes a heat-release rate (HRR) module, a first filter module, a second filter module, an auto-ignition energy determination module, and a corrective action module. The HRR module generates an HRR signal based on in-cylinder pressures of a cylinder of the engine. The first filter module generates a first filtered HRR signal indicative of a first HRR due to combustion in the cylinder by filtering the HRR signal. The second filter module generates a second filtered HRR signal indicative of a second HRR due to auto-ignition in the cylinder by filtering one of the HRR signal and the first filtered HRR signal. The auto-ignition energy determination module determines an auto-ignition energy of the cylinder based on the first and second filtered HRR signals. The corrective action module selectively adjusts auto-ignition of the engine based on the auto-ignition energy. A related method is also provided. | 03-31-2011 |
20110087423 | SYSTEM AND METHOD FOR CONTROLLING ENGINE COMPONENTS DURING CYLINDER DEACTIVATION - An engine control system includes a power supply module, a measurement module, and a calibration module. The power supply module disables power supplied to N components of an engine when M cylinders of the engine are deactivated, wherein M and N are integers greater than or equal to one. The measurement module measures outputs of the N engine components. The calibration module calibrates the measurement module based on unpowered measurements from one or more of the N engine components during a period after the power supplied to the N components is disabled. | 04-14-2011 |
20110093186 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - Control apparatus for an internal combustion engine including: a second knock detection unit for detecting occurrence of a second knock due to an effective compression ratio when ignition timing is on a retard side of a predetermined value in the case where a first knock is detected; a second knock suppression unit for suppressing the second knock when the second knock is detected; a first abnormal ignition detection means for detecting occurrence of first abnormal ignition due to the pre-ignition or the post-ignition when a knock intensity of the second knock is equal to or larger than a predetermined value; and a first abnormal ignition suppression unit for suppressing the first abnormal ignition by performing fuel control for the internal combustion engine when the first abnormal ignition is detected. | 04-21-2011 |
20110106412 | METHOD AND APPARATUS FOR REDUCING SPARK PLUG FOULING - A control module and method for controlling an engine operation includes a runtime module that determines a previous run period, a fuel mass module that determines a fuel mass during the previous run period, a spark fouling condition estimation module that determines a spark fouling condition based on the fuel mass during the previous run period and an engine operation module that controls the engine in response to the spark fouling condition. | 05-05-2011 |
20110118960 | KNOCKING DETECTING APPARATUS FOR INTERNAL COMBUSTION ENGINE - A knocking detecting apparatus for an internal combustion engine, which can more accurately perform the knocking determination based on frequency components of the output signal of the knock sensor, is provided. A frequency spectrum analysis of the knock sensor output signal is performed at predetermined angular intervals of the crankshaft rotation angle. Intensities of a plurality of frequency components obtained by the frequency spectrum analysis are stored as time series data. The time series data of the frequency component intensity are binarized, and it is determined whether or not a knocking has occurred based on the binarized time series data. | 05-19-2011 |
20110144893 | METHOD 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. | 06-16-2011 |
20110153182 | DEVICE AND METHOD FOR DETERMINING KNOCK IN AN INTERNAL COMBUSTION ENGINE - An internal combustion engine knock determining device includes a vibration detector that produces a signal corresponding to engine vibration, an intensity computing unit that retrieves vibrational components in a plurality of frequency regions in which vibration intensity peaks are located when knock occurs, a background-noise computing unit that calculates background noise caused by factors other than knock, a frequency computing unit that determines specific frequency regions from which to determine whether knock is occurring by excluding certain frequency regions designated as frequency regions requiring exclusion due to the intensity of false-detection causing noise as a proportion of the background noise in the certain regions, and a knock determining unit that determines the occurrence of knock based on the vibration intensity in the specific frequency regions obtained by excluding the frequency regions requiring exclusion, wherein the number of specific frequency regions is increased to improve the accuracy of knock detection. | 06-23-2011 |
20110224889 | Knocking Control System for Gas Engine - A knocking control system comprises a knocking determiner device for determining whether or not knocking with a predetermined intensity or higher has occurred in a cylinder of a gas engine in each cycle; an integration variable calculator which adds to an integration variable CT when the knocking determiner device determines that the knocking with the predetermined intensity or higher has occurred, and subtracts from the integration variable CT when the knocking determiner determines that the knocking with the predetermined intensity or higher has not occurred; and a main controller for reducing a power output of the cylinder if the integration variable CT is not less than a threshold. | 09-15-2011 |
20110231084 | ROTATIONAL FLUCTUATION MALFUNCTION DETECTION DEVICE AND ROTATIONAL FLUCTUATION MALFUNCTION DETECTION METHOD FOR INTERNAL COMBUSTION ENGINE - A rotational fluctuation malfunction detection device for an internal combustion engine determines that fluctuations in output shaft rotational speed are “normal” when a rotational fluctuation value, obtained in a “disturbance fluctuation state” is below threshold L1. If rotational fluctuation value obtained in “disturbance fluctuation state” equals or exceeds L | 09-22-2011 |
20110246049 | ABNORMAL COMBUSTION DETECTION METHOD FOR SPARK-IGNITION ENGINE, AND SPARK-IGNITION ENGINE - When a maximum value of vibration intensity (maximum vibration intensity) (Vmax) acquired from a vibration sensor ( | 10-06-2011 |
20110257872 | KNOCK DETERMINING DEVICE - An output signal of a knock sensor is filtered with a plurality of band-pass filters to extract vibration waveform components of a plurality of frequency bands (f | 10-20-2011 |
20120029795 | METHOD 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 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, are coordinated with the direct injection to reduce torque and EGR transients. | 02-02-2012 |
20120035835 | METHOD 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. | 02-09-2012 |
20120232775 | METHOD FOR ADAPTING AN ENGINE TO THE FUEL GRADE BY DECREMENTING THE INITIAL OCTANE NUMBER OF THE FUEL - A method for adapting an engine to an octane number of fuel by decrementing an initial octane number. Starting with a reference setting of the spark advance in an engine operating range for a given octane number, the engine operating range being divided into a plurality of zones, each including an anti-pinking corrective value of the spark advance of the reference setting, the engine is switched to a reference setting that corresponds to a lower octane number: when a threshold value of the advance correction loop is exceeded in at least one zone, or when a counter of the number of zones, in which another threshold value of the advance correction loop is exceeded, exceeds a multi-zone threshold. | 09-13-2012 |
20120271536 | METHOD AND DEVICE FOR RECOGNIZING UNCONTROLLED COMBUSTIONS IN AN INTERNAL COMBUSTION ENGINE - A method for recognizing uncontrolled combustions in an internal combustion engine which occur independently of the ignition by a spark plug. The pressure oscillations in the combustion chamber triggered by the combustion are detected and evaluated. To allow identification at any time of an uncontrolled combustion prior to ignition by the spark plug and/or prior to the normal combustion initiation for a given ignition point, the rotational speed of a crankshaft of the internal combustion engine which is influenced by the pressure oscillations, is evaluated. | 10-25-2012 |
20120296558 | CONTROL UNIT OF INTERNAL COMBUSTION ENGINE - A peak signal extracting device extracts a first peak value, being the maximum value of vibration level of a specified frequency in a predetermined crank angle range, and a crank angle; noise level storage device stores a noise vibration level; noise occurrence timing estimation device estimates a crank angle at which noise vibration peak takes place; and noise removing device calculates a second peak value based on the first peak value when a crank angle at which first peak value takes place and a crank angle at which noise peak value estimated to take place are not in coincidence, and calculates a second peak value based on the first peak value and noise peak value when the crank angles are identical. Even if the knocking vibration peak and noise vibration peak are overlapped, presence or absence of occurrence of knocking is determined precisely and a knocking strength is calculated properly. | 11-22-2012 |
20120310513 | METHOD OF ESTIMATING THE INTENSITY OF THE KNOCKING OF AN INTERNAL COMBUSTION ENGINE BY INVERSION OF A WAVE EQUATION - A method of real-time estimation of the intensity of the knocking of an internal combustion engine utilizing a vibratory sensor is disclosed which is useful for control of internal combustion. A vibratory signal representing vibrations of the engine is continuously acquired as a function of the crankshaft angle. A model of a wave equation propagating through the cylinder-head is constructed. The coefficients of a Fourier decomposition of the vibratory signal are determined in real time by inverting the dynamics of the wave equation model using an estimator. The energy contained in the signal is computed by summing the squares of the coefficients of the Fourier decomposition. A parameter correlated with the intensity of knocking equal to the square root of the maximum of the energy is determined in real time. | 12-06-2012 |
20120316761 | CPS KNOCK DETECTION SYSTEM - A control system includes a cylinder pressure sensor (CPS) that senses a cylinder pressure of an engine and generates a CPS signal based on the cylinder pressure. A CPS failure detection module selectively generates a failure signal based on characteristics of the CPS signal in a knock frequency range. A status detection module generates a CPS status signal based on the CPS signal and the failure signal. | 12-13-2012 |
20120316762 | METHOD AND SYSTEM FOR PRE-IGNITION CONTROL - Methods and systems are provided for identifying and differentiating knock and pre-ignition using a plurality of knock sensors distributed along an engine block. By dynamically adjusting cylinder-specific assignment of the knock sensors for knock detection and pre-ignition detection based on operating conditions of each cylinder, knock and pre-ignition is more reliably identified and distinguished. | 12-13-2012 |
20130024099 | INTERNAL COMBUSTION ENGINE AND STRADDLE-TYPE VEHICLE EQUIPPED WITH THE ENGINE - A single-cylinder internal combustion engine includes a knock sensor mounted to apart other than a cylinder block to detect knocking. The engine includes a crankcase, a cylinder block, and a cylinder head connected by a bolt. A boss to mount the knock sensor is provided on the crankcase. A center of the boss is positioned on a same side of a cylinder axis as the bolt, when viewed in an axial direction of the boss. | 01-24-2013 |
20130073189 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A control apparatus for an internal combustion engine is provided that can correct a shift in an output value of an in-cylinder pressure sensor that occurs for a predetermined time period after occurrence of abnormal combustion. A pre-occurrence output characteristic indicating a relationship between in-cylinder pressure and an actual sensor output value of the in-cylinder pressure sensor in a pre-occurrence cycle before occurrence of abnormal combustion is previously stored. Estimated in-cylinder pressure in a post-occurrence cycle after occurrence of abnormal combustion is acquired. A post-occurrence output characteristic is calculated from the estimated in-cylinder pressure and the sensor output value in the post-occurrence cycle. A difference between outputs of the in-cylinder pressure sensor before and after occurrence of the abnormal combustion is calculated from the pre-occurrence output characteristic and the post-occurrence output characteristic. The sensor output value in the post-occurrence cycle is calibrated using the difference between outputs. | 03-21-2013 |
20130096809 | METHOD AND DEVICE FOR HANDLING UNCONTROLLED COMBUSTIONS IN AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE - A method for handling uncontrolled combustions in an internal combustion engine of a motor vehicle, the uncontrolled combustions occurring independently of the ignition by a spark plug and being detected in or at the internal combustion engine. To allow a rapid yet reliable reduction of uncontrolled combustions in an internal combustion engine in order to protect the internal combustion engine from damage, the number of detected uncontrolled combustions in a monitoring period is determined and compared to a threshold value. A temperature in a combustion chamber of the internal combustion engine is dropped if the threshold value is exceeded. | 04-18-2013 |
20130151127 | INTERNAL COMBUSTION ENGINE CONTROL APPARATUS - An internal combustion engine control apparatus includes a pseudo knock determination unit that determines whether or not a pseudo knock has been produced in a knock detection window, based on at least one of the frequency, a status amount indicating a rotation speed of the internal combustion engine, a status amount indicating a load of the internal combustion engine, and a status amount indicating an air-fuel ratio of the internal combustion engine; and a moving-average processing unit that sets a second period to a period that is approximately the same as a first period, in the case where it has been determined that the pseudo knock was not produced, and that does not implement moving-averaging or sets the second period to a period that is narrower than the first period, in the case where it has been determined that a pseudo knock was produced. | 06-13-2013 |
20130151128 | INTERNAL COMBUSTION ENGINE CONTROL APPARATUS - There are provided a combustion start determination unit that determines whether or not the inner-cylinder state of an internal combustion engine has changed from a non-combustion state to a combustion state; and a filter coefficient changing demand unit that outputs a filter coefficient changing demand until a predetermined filter coefficient changing period elapses from the time instant when the combustion start determination unit determines that the inner-cylinder state of the internal combustion engine has changed from the non-combustion state to the combustion state to the time instant. Based on the filter coefficient changing demand, at least one of a background level calculation unit and a standard deviation calculation unit changes the value of a filter coefficient utilized in a filtering operation to the one with which a filtering effect is weakened. | 06-13-2013 |
20130166183 | KNOCK CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A knock control apparatus for an internal combustion engine includes a knock signal normalization portion that normalizes a knock signal using base statistics calculated on the basis of the knock signal. The knock signal normalization portion calculates base statistics on the basis of a last value and a current value of the knock signal and normalizes the knock signal using a base statistic interpolated according to an operating state. | 06-27-2013 |
20130166184 | METHOD AND DEVICE FOR SETTING AN EMERGENCY OPERATIONAL MODE IN A SYSTEM WHICH DETECTS PRE-IGNITIONS IN A COMBUSTION ENGINE, AND WHICH CONTAINS ERRORS - The invention relates to a method for setting an emergency operational mode in a system which detects pre-ignitions in a combustion engine and which contains errors. The system consists of at least one sensor ( | 06-27-2013 |
20130179052 | SENSOR SIGNAL PROCESSING DEVICE - A microcomputer is formed of a CPU and a detection circuit and inputs sensor signals of a vibration sensor and a rotation sensor. The detection circuit includes an AD converter circuit for AD conversion of the sensor signal of the vibration sensor at a predetermined sampling interval, a peak hold circuit for detecting a peak value of the sensor signal, a RAM for storing the peak value, a counter for detecting a crank angle at a peak value detection time, and an angle calculation part. The microcomputer divides a pre-ignition check interval into plural interval units and checks the pre-ignition based on the peak value detected in each unit interval. The pre-ignition and the knock are checked by using different threshold values in an interval, in which the pre-ignition check interval overlaps a knock check interval. | 07-11-2013 |
20130218443 | KNOCK CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - In a knock control device of an internal combustion engine equipped with a control unit which updates a background level based on an output signal from a knock sensor and detects the generation of a knock by comparing a variation of the background level with a knock determination value, a determination as to whether the knock is generated is performed by ((variation of first filter value of peak hold value)>((1−filter coefficient)/(1+filter coefficient)×(predetermined value larger than maximum value of variation of peak hold value in case where knock is not generated))). | 08-22-2013 |
20130218444 | OPERATING METHOD FOR AN INTERNAL COMBUSTION ENGINE - In an operating method for a direct-injection gasoline internal combustion engine having a plurality of combustion chambers with at least partially low-NO | 08-22-2013 |
20130238223 | METHOD AND DEVICE FOR RECOGNIZING PRE-IGNITIONS IN A GASOLINE ENGINE - A method for recognizing pre-ignitions in a gasoline engine which occur in the combustion chamber of the gasoline engine, independently of the ignition of a fuel-air mixture by a spark plug. In a method which reliably recognizes the formation of sporadically imminent pre-ignitions, a combustion chamber pressure which occurs prior or subsequent to the ignition point of the spark plug is evaluated for determining the pre-ignition. | 09-12-2013 |
20130245924 | INTERNAL COMBUSTION ENGINE KNOCK CONTROLLING APPARATUS - An internal combustion engine knock controlling apparatus is obtained that improves knock detection performance by making a correction period appropriate without performing matching, when calculating a transition correction factor for correcting a filter coefficient used for calculating a mean value and a standard deviation of a knock signal in a transitional operation state. A previous value of a filter coefficient for calculating a knock determination threshold value that has been corrected by a transition correction factor is used for a filter coefficient for calculating the transition correction factor so that the response characteristics are made equal between a filtering process used for calculating a transition correction factor for correcting a knock determination threshold value and a filtering process used for calculating the knock determination threshold value in a transition operation period. | 09-19-2013 |
20130268180 | METHOD FOR RECOGNISING IRREGULAR COMBUSTION PROCESSES IN AN INTERNAL COMBUSTION ENGINE - A method for recognizing irregular combustion in an internal combustion engine includes supplying fuel directly to a combustion chamber of a cylinder of the internal combustion engine using an injector. The injector is connected to a fuel supply line that includes a pressure sensor configured to measure pressure in the fuel supply line. The pressure in the fuel supply line is measured during the supply of fuel into the combustion chamber. It is then ascertaining whether irregular combustion is occurring based on the measured pressure in the fuel supply line. | 10-10-2013 |
20130282260 | CONTROL SYSTEM FOR A MODEL-BASED KNOCK SUPPRESSION SYSTEM USING A MULTIPLE ACTUATION STRATEGY - The present invention provides for predicting peak cylinder temperatures above which knock in an engine may become more frequent and then provides one or more actuation approaches to reduce the knock of the engine while maintaining engine performance. The actuation approaches of the present invention include one or more of direct injection, engine gas recirculation, and spark retarding, where the application of one or more the actuation approaches is determined based upon using operational and engine characteristic inputs as well as modeling and estimation values as inputs in a feedforward control methodology. | 10-24-2013 |
20130282261 | COMBUSTION STATE CONTROL DEVICE FOR VEHICULAR INTERNAL COMBUSTION ENGINE - A combustion state control device for an internal combustion engine includes an abnormal combustion detecting unit for detecting abnormal combustion of the internal combustion engine, a fuel supply cut-off unit for cutting off a fuel supply to a cylinder where the abnormal combustion is detected during a cycle from an intake stroke of the cylinder to a next intake stroke thereof, when the abnormal combustion detecting unit detects the abnormal combustion of a cylinder, a vehicle vibration detecting unit for detecting vibration of a vehicle, and a fuel supply cut-off ending unit for ending cutting off of the fuel supply when the vehicle vibration detecting unit detects the vibration of the vehicle while the fuel supply is being cut off. | 10-24-2013 |
20130317726 | Minimizing Alcohol Use In High Efficiency Alcohol Boosted Gasoline Engines - A number of systems and methods are disclosed which increase the replenishment interval for anti-knock fluid. This is especially important during activities which require a large amount of anti-knock fluid, such as towing. In some embodiments, the systems and methods are used to reduce anti-knock fluid consumption. For example, changes to engine operation, such as rich operation, spark retarding, upspeeding, and variable valve timing, all serve to reduce the amount of anti-knock fluid required to eliminate knocking. In other embodiments, the composition of the anti-knock fluid is modified, such as by using a higher octane fluid, or through the addition of water to the anti-knock fluid. In other embodiments, the replenishment interval is increased through a larger anti-knock fluid storage capacity. In one embodiment, a three tank system is used where the third tank can be used to store gasoline or anti-knock fluid, depending on the driving conditions. | 11-28-2013 |
20130325302 | METHOD FOR KNOCK DETECTION - A method for knock detection in an internal combustion engine in which a fuel/air mixture is ignited by means of a corona discharge. To generate the corona discharge, an electrical resonant circuit is excited, in which an ignition electrode that is electrically insulated with respect to combustion chamber walls constitutes a capacitor together with the combustion chamber walls. For knock detection, an electrical variable of the resonant circuit is measured and the course thereof is evaluated. The course of the electrical variable is checked to determine whether it has a local extremum after the start of the fuel combustion. | 12-05-2013 |
20140052363 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine, in particular a gas engine having at least two cylinders, includes acquiring a cylinder-specific first cylinder signal (p | 02-20-2014 |
20140058650 | VALVETRAIN FAULT INDICATION SYSTEMS AND METHODS USING KNOCK SENSING - A system for a vehicle includes a knock indication module, a valve control module, and a fault indication module. The knock indication module selectively indicates that knock occurred within a cylinder of an engine. The valve control module controls lifting of a valve of a cylinder of the engine and, in response to the knock indication module indicating that knock occurred within the cylinder, transitions lifting of the valve from one of a low lift state and a high lift state to the other one of the low lift state and the high lift state. The fault indication module selectively indicates that a fault is present in a variable valve lift (VVL) mechanism of the cylinder based on whether the knock indication module indicates that knock occurred within the cylinder after the transition to the other one of the low lift state and the high lift state. | 02-27-2014 |
20140081560 | ENGINE MANAGEMENT STRATEGY - A system and method for controlling a vehicle to implement an engine torque management strategy. The engine torque management strategy implements a sophisticated engine knock control method that alleviates/mitigates the cause of the knock while also optimizing vehicle performance and engine efficiency without compromising engine hardware protection. Whenever suitable, the system and method attempt to reduce the amount of air trapped in a knocking cylinder to reduce its effective compression ratio and to eliminate the knock while keeping the same optimal spark timing for combustion efficiency. | 03-20-2014 |
20140100762 | METHOD AND SYSTEM FOR KNOCK CONTROL - Methods and systems are provided for improving engine knock control by accounting for a drop in charge cooling efficiency of a knock control fluid at higher temperatures. In response to the prediction of an elevated temperature of a knock control fluid at a time of release from a direct injector, a pulse width of the injection is adjusted. Any knock relief deficits are compensated for using alternate engine adjustments, such as boost or spark timing adjustments. | 04-10-2014 |
20140136085 | LASER IGNITION AND MISFIRE MONITOR - Systems and methods for increasing an accuracy of misfire detection are described. An infra-red sensor coupled to a cylinder is used to sense an in-cylinder temperature profile following a laser ignition event. A misfire event is identified based on a deviation of the sensed profile from an expected profile. | 05-15-2014 |
20140149021 | INTERNAL COMBUSTION ENGINE CONTROL DEVICE - An internal combustion engine control device includes: detection means ( | 05-29-2014 |
20140163844 | STOCHASTIC PRE-IGNITION PREDICTION AND MITIGATION SYSTEMS AND METHODS - An engine control system for a vehicle includes a timer module, a stochastic pre-ignition (SPI) mitigation module, and a boost control module. The timer module tracks a period of operation of an engine where vacuum within an intake manifold is less than a first predetermined vacuum. The SPI mitigation module generates an SPI signal when the period is greater than a predetermined period and the vacuum is less than a second predetermined vacuum. The second predetermined vacuum is less than the first predetermined vacuum. The boost control module reduces output of a turbocharger in response to the generation of the SPI signal. | 06-12-2014 |
20140172279 | METHOD TO REDUCE ENGINE COMBUSTION AND HARMONIC NOISE FOR MISFIRE DETECTION - A method and system for determining combustion and harmonic noise correction factors for current operating conditions corresponding to the actual vehicle and applying the combustion and harmonic noise correction factors to a sensor signal, thereby removing engine combustion and harmonic noise from the sensor signal and leaving a misfire data signal in the sensor signal. | 06-19-2014 |
20140172280 | METHOD FOR DETECTING COMBUSTION NOISE IN INTERNAL COMBUSTION ENGINE, COMBUSTION NOISE DETECTION DEVICE, AND DEVICE FOR CONTROLLING INTERNAL COMBUSTION ENGINE - Although a method for changing a combustion method taking place in an internal combustion engine depending on running condition is proposed, it can be considered that conditions under which a combustion noise occurs naturally differ with different methods. A detection method of prior art is not compatible with different combustion methods and the accuracy of combustion noise detection was low. Accurate combustion noise detection is enabled by identifying a combustion mode taking place in the internal combustion engine, selecting a sensed frequency or frequency band of a combustion noise sensor that detects a combustion noise in a combustion chamber of the internal combustion engine according to the combustion mode, and detecting a combustion noise. | 06-19-2014 |
20140180562 | METHOD FOR RECOGNISING THE TYPE OF FUEL ACTUALLY USED IN AN INTERNAL COMBUSTION ENGINE - A method for recognising the type of fuel actually used in an internal combustion engine; the recognition method includes the steps of: sensing the intensity of the vibrations generated by the internal combustion engine within a measurement time window; determining the value of at least one synthetic index by processing the intensity of the vibrations generated by the internal combustion engine within the measurement time window; comparing the synthetic index with at least one predetermined comparison quantity; and recognising the type of fuel actually used as a function of the comparison of the synthetic index to the comparison quantity; and forcedly altering, when detecting the intensity of the vibrations, the engine control with respect to the normal standard engine control, so as to enhance the behavioural differences of the different types of fuel that can be used by the internal combustion engine. | 06-26-2014 |
20140188374 | METHOD 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. | 07-03-2014 |
20140200796 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for use of a windshield wiper fluid having a reformulated composition including one or more non-ionic surfactants. The fluid is delivered to the windshield in response to an operator demand for wiping the windshield. The same fluid is also delivered to a cylinder in response to an indication of abnormal cylinder combustion. | 07-17-2014 |
20140222319 | Minimizing Alcohol Use In High Efficiency Alcohol Boosted Gasoline Engines - A number of systems and methods are disclosed which increase the replenishment interval for anti-knock fluid. This is especially important during activities which require a large amount of anti-knock fluid, such as towing. In some embodiments, the systems and methods are used to reduce anti-knock fluid consumption. For example, changes to engine operation, such as rich operation, spark retarding, upspeeding, and variable valve timing, all serve to reduce the amount of anti-knock fluid required to eliminate knocking. In other embodiments, the composition of the anti-knock fluid is modified, such as by using a higher octane fluid, or through the addition of water to the anti-knock fluid. In other embodiments, the replenishment interval is increased through a larger anti-knock fluid storage capacity. In one embodiment, a three tank system is used where the third tank can be used to store gasoline or anti-knock fluid, depending on the driving conditions. | 08-07-2014 |
20140249733 | ACTIVE VIBRATION ISOLATING SUPPORT APPARATUS - An active vibration isolating support apparatus reduces vibration transmitted from a reciprocating engine. The apparatus supports the engine via vibration isolating support units each of which includes an actuator. The vibration isolating units are disposed on opposite sides of a crankshaft of the engine. The apparatus includes a control unit to make the actuator extend and contract periodically depending on a vibrational state of the engine so as to reduce the transmission of engine vibrations to a vehicle body. The control unit drives the actuator of one of the vibration isolating support units to contract, the one of the vibration isolating support units being compressed by roll vibration associated with an initial explosion after a time when the engine starts, so as to reduce transmission of roll vibration in a direction which is reverse to the rotation direction of the crankshaft. | 09-04-2014 |
20140278017 | APPARATUS, SYSTEM, AND METHOD FOR REDUCING ENGINE KNOCK - A system and method for reducing engine knock associated with an internal combustion engine. An exhaust gas recirculation sub-system is fluidly connected to the internal combustion engine and includes a compressor and an exhaust gas storage tank fluidly connected to the compressor. In response to measuring that engine knock is occurring, compressed exhaust gas is injected from the exhaust gas storage tank into a combustion chamber of the internal combustion engine. | 09-18-2014 |
20140297164 | STOCHASTIC PRE-IGNITION (SPI) MITIGATION USING AN ADAPTIVE SPI SCALER - A system includes a control module and a stochastic pre-ignition (SPI) module. The control module controls at least one performance parameter of an engine of a vehicle. The SPI module detects SPI events, determines a scaling factor based on the detected SPI events, and adjusts a limit associated with the at least one performance parameter based on the scaling factor. The control module controls the at least one performance parameter based on the limit. | 10-02-2014 |
20150019111 | System and Method for Alerting and Suppression of Detonation and/or Pre Ignition Phenomena in Internal Combustion Engines by Monitoring RPM Fluctuation - An engine system with advance detection of detonation and/or pre ignition, the system comprising an engine, operative for propulsion of a vehicle by generating rotational motion, whose rotational velocity over time is monitored; and a detonation and/or pre ignition detector operative to provide an alert for impending detonation and/or pre ignition of the engine, if the rotational velocity fluctuates over time to an extent which is predetermined to be unsafe. | 01-15-2015 |
20150019112 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - Knocking and misfire are judged by detecting combustion ions generated in a combustion chamber with an ion sensor, obtaining an integral signal by integrating the ion signal, and comparing the integral signal with a misfire judgment value and a knocking judgment value based on a signal obtained by averaging integral signals of prescribed past cycles. It is possible to: reduce a computation load by detecting misfire and knocking with an identical ion sensor and carrying out a judgment treatment with identical judgment function logic; and detect trace knocking by setting a knocking judgment threshold value and hence increase the accuracy of ignition timing control. | 01-15-2015 |
20150046069 | Minimizing Alcohol Use In High Efficiency Alcohol Boosted Gasoline Engines - A number of systems and methods are disclosed which increase the replenishment interval for anti-knock fluid. This is especially important during activities which require a large amount of anti-knock fluid, such as towing. In some embodiments, the systems and methods are used to reduce anti-knock fluid consumption. For example, changes to engine operation, such as rich operation, spark retarding, upspeeding, and variable valve timing, all serve to reduce the amount of anti-knock fluid required to eliminate knocking. In other embodiments, the composition of the anti-knock fluid is modified, such as by using a higher octane fluid, or through the addition of water to the anti-knock fluid. In other embodiments, the replenishment interval is increased through a larger anti-knock fluid storage capacity. In one embodiment, a three tank system is used where the third tank can be used to store gasoline or anti-knock fluid, depending on the driving conditions. | 02-12-2015 |
20150100221 | NOISE/VIBRATION REDUCTION CONTROL - In one aspect, a system for reducing noise or vibration generated by an internal combustion engine is described. An engine controller is arranged to generate firing information suitable for operating the working chambers of the engine in a skip fire manner to deliver a desired amount of torque. A noise/vibration reduction unit is arranged to help reduce noise or vibration based on the firing information. The noise/vibration controller actively controls a device that is not a part of the engine to alter an NVH characteristic of the vehicle in a desired manner based at least in part on a skip fire characteristic. | 04-09-2015 |
20150149066 | ENGINE KNOCK SIGNAL TRANSMISSIVE ELEMENT - Embodiments may provide an engine knock monitoring system that may include an engine block including an engine block body and a cylinder wall defining at least a portion of a combustion chamber. A space may be defined between a top of the cylinder wall and a top of the engine block body. An engine knock sensor may be mounted to the engine block. A pressure pulse transmissive element may be disposed in the space and may be disposed in contact with an outside surface of the cylinder wall and an opposite inside surface of the engine block body. | 05-28-2015 |
20150149067 | KNOCKING CONTROL METHOD BASED ON SEPARATION LEARNING RANGE - A knocking control method based on a separation learning range may include (a) designating a learning cell in a driving range represented by a load-rotating number, (b) dividing the learning cell into individual cells, (c) designating a knocking cell of a partial load and a knocking cell of a full load, respectively, as other cells; and (d) determining a reference of a spark timing advanced and lagged angle by a difference between a partial load learning value of a high load and a learning value in the full load and based on the determined reference, simultaneously performing a knocking cell learning of the partial load and a knocking cell learning of the full load or not performing the knocking cell learning of the full load at the time of performing the knocking cell learning of the partial load. | 05-28-2015 |
20160123249 | KNOCK DETERMINATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - A knock determination apparatus for an internal combustion engine calculates a knock intensity based on an output signal of an in-cylinder pressure sensor in a gate range for knock determination. When the calculated knock intensity is larger than a knock determination threshold value, the knock determination apparatus determines that knock has occurred. Further, the knock determination apparatus calculates an integrated intensity which is an integrated value of knock intensities that are equal to or larger than a knock intensity at a point of 97% or more in a target knock level among knock intensities that are calculated at the respective cycles during continuous N cycles in the same cylinder. Furthermore, the knock determination apparatus corrects a knock determination threshold value so that the difference between the calculated integrated intensity and a target integrated intensity becomes small. | 05-05-2016 |
20160146704 | MISFIRE DETECTION WITH CRANKSHAFT VIBRATIONS - Methods and systems are provided for engine misfire detection. In one example, a method may include sampling crankshaft fluctuations with a first and a second sampling window, wherein the first and second windows overlapping each other; and identify misfire based on the sampled signals. The method may further comprise adjusting engine operation responsive to the misfire indication via a control unit. | 05-26-2016 |
20160201586 | NOISE, VIBRATION AND HARSHNESS REDUCTION IN A SKIP FIRE ENGINE CONTROL SYSTEM | 07-14-2016 |
20160377043 | Engine Operation Control - Systems and methods of controlling operation of a vehicle engine are provided. For instance, one example aspect of the present disclosure is directed to determining a spark timing associated with a combustion engine. For instance, a combustion phasing target to be implemented by a combustion engine can be received. A spark timing associated with the combustion engine can be determined based at least in part on the combustion phasing target. The spark timing can be determined based at least in part on an optimization comprising one or more iterations determined during an engine cycle. The spark timing is determined based at least in part on a combustion phasing prediction model determined based at least in part on at least one of laminar flame speed, residual gas mass, or turbine intensity. | 12-29-2016 |
20170232956 | HYBRID VEHICLE AND METHOD OF REDUCING ENGINE LUGGING | 08-17-2017 |
20190145329 | NOISE, VIBRATION AND HARSHNESS REDUCTION IN A SKIP FIRE ENGINE CONTROL SYSTEM | 05-16-2019 |