| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123406260 | Combustion condition responsive | 69 |
| 20080289603 | Engine Control System, Vehicle Having the Same, Method for Calculating Fuel Center of Gravity, and Method for Controlling Engine - An engine control system enables engine control to cause ignition timing to approximate MBT without necessarily measuring torque and combustion pressure. The negative ion current in an engine combustion chamber is measured and a first crank angle B corresponding to a first rate in change of the negative ion current curve E is identified. A second crank angle C corresponding to a second rate in change of the negative ion current curve E also is identified. The ignition timing is controlled based upon a third crank angle G that generally is a midpoint between the first crank angle B and the second crank angle C. The third crank angle G becomes a specified target crank angle. | 11-27-2008 |
| 20090050108 | Operation Control Method on the Basis of Ion Current In Internal Combustion Engine - The present invention is an operation control method on the basis of an ion current in an internal combustion engine, the method comprising a step of detecting the ion current generated within a combustion chamber | 02-26-2009 |
| 20090173315 | INTERNAL-COMBUSTION-ENGINE COMBUSTION CONDITION DETECTION APPARATUS AND COMBUSTION CONDITION DETECTION METHOD - An internal-combustion-engine combustion condition detection apparatus is provided with an ignition means that makes an ignition plug ignite a fuel; an ignition control means that controls the operation of the ignition means; an ion-current detection means that detects an ion current generated; an ion current detection range setting means that sets an ion-current detection range; a preignition detection means that detects preignition within a detection range to be set; a leakage current detection range setting means that sets a leakage-current detection range; and a leakage current determination means that determines whether or not a smolder exists, based on a current detected, within a detection range to be set, by the ion-current detection means. The ignition control means includes a non-combustion-stroke ignition control means; the leakage-current detection range set by the leakage current detection range setting means is set within the non-combustion stroke. | 07-09-2009 |
| 20100006066 | VARIABLE PRIMARY CURRENT FOR IONIZATION - A system and a method for controlling an ignition coil charge duration are disclosed, wherein the system includes an ignition coil in electrical communication with a control unit and at least one of an ionization detection circuit and at least one sensor. The control unit controls the ignition coil charge duration to facilitate detection and militate against an undesirable interruption of an ionization output signal during the combustion process. | 01-14-2010 |
| 20100122689 | COMBUSTION STATE DETECTION APPARATUS FOR INTERNAL COMBUSTION ENGINE - Disclosed is a combustion state detection apparatus for an internal combustion engine, which is capable of detecting abnormal combustion with high accuracy. The combustion state detection apparatus for an internal combustion engine includes: a variety of sensors; an ignition coil; an ignition plug; a transistor; a switching control unit; an ion current detection unit; and abnormal combustion detection units for determining that abnormal combustion has occurred in a case where a crank angle at a point of time when the ion current exceeds a predetermined current value or when the ion current that exceeds the predetermined current value reaches a peak value thereof is on a spark-advance side compared with a crank angle for determining abnormal combustion. The switching control unit ends the spark discharge at a predetermined timing while the spark discharge is in progress after the primary current is shut off and the spark discharge is generated. | 05-20-2010 |
| 20100206267 | Combustion Control Using Ion Sense Feedback And Multi-Strike Spark To Manage High Dilution And Lean AFR - A system and method for operating a multiple cylinder internal combustion engine having at least one actuator for controlling charge dilution of at least one cylinder and at least one spark plug per cylinder include attempting to improve combustion quality by modifying ignition energy of the at least one spark plug before modifying charge dilution of the cylinder, and modifying both ignition energy and charge dilution substantially simultaneously to establish combustion if an ionization sense signal associated with the cylinder indicates a misfire. | 08-19-2010 |
| 20110017172 | CONTROLLER FOR INTERNAL COMBUSTION ENGINE - An ON-ignition signal is outputted from an ignition control portion in a period from a posterior time point of the power stroke to an valve opening timing of an exhaust valve so that a capacitor is charged. Then, when it is determined that the maximum value of an ion-output value detected during a negative valve overlap period becomes greater than or equal to a threshold, it is determined that the applied voltage between an center electrode and a ground electrode of a spark plug is dropped. The ON-ignition signal is outputted again to charge the capacitor before the intake valve is opened. | 01-27-2011 |
| 20110126803 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - A control device for a spark-ignition internal combustion engine that sets ignition timing based on a target value of a predetermined combustion-related parameter correlated with a combustion state and operates an ignition device in accordance with the ignition timing thus set. The control device calculates an actual value of the combustion-related parameter from an output value of the cylinder pressure sensor and feeds back the calculated value of the combustion-related parameter to the setting of ignition timing. Further, in parallel with the above processing, the control device calculates a value of a predetermined combustion variation parameter correlated with the magnitude of combustion variation from the output value of the cylinder pressure sensor. If the calculated value of the combustion variation parameter deviates from an allowable range of the combustion variation, the control device stops the feedback of the calculated value of the combustion-related parameter. | 06-02-2011 |
| 20120118266 | METHOD AND APPARATUS FOR CONTROLLING SPARK TIMING IN AN INTERNAL COMBUSTION ENGINE - A method for operating a spark-ignition internal combustion engine includes controlling spark ignition timing responsive to a combustion charge flame speed corresponding to an engine operating point and a commanded air/fuel ratio associated with an operator torque request. | 05-17-2012 |
| 20120118267 | COMBUSTION PHASING CONTROL IN SPARK-ASSISTED HCCI COMBUSTION MODE - A method for controlling combustion in a multi-cylinder spark-ignition direct-injection internal combustion engine includes determining a desired combustion phasing for maintaining acceptable combustion properties, monitoring combustion phasing of each cylinder, selecting a target combustion phasing corresponding to one of the cylinders having a most retarded combustion phasing, adjusting spark timing in each cylinder not having the most retarded combustion phasing to achieve the target combustion phasing to balance the combustion phasing in all the cylinders at the target combustion phasing, and adjusting an external EGR percentage to converge the balanced combustion phasing in all the cylinders toward the desired combustion phasing. | 05-17-2012 |
| 20150107557 | CONTROL DEVICE AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - Provided is a control device for an internal combustion engine, which enables enlargement of an operation region in which homogenous-charge compression ignition combustion enabling the generation of NOx to be suppressed and fuel efficiency to be improved can be performed. An ignition-timing control section ( | 04-23-2015 |
| 20150300278 | USING ION CURRENT SIGNAL FOR ENGINE PERFORMANCE AND EMISSIONS MEASURING TECHNIQUES AND METHOD FOR DOING THE SAME - A system and method is provided for the use of the ion current signal characteristics for onboard cycle-by-cycle, cylinder-by-cylinder measurement. The system may also control the engine operating parameters based on a predicted NOx emission level, CO emission level, CO | 10-22-2015 |
| 20150354477 | SYSTEMS AND METHODS FOR EGR CONTROL - Methods and systems are provided for reducing torque transients experienced when a dedicated EGR cylinder is deactivated to reduce EGR. Before deactivating the dedicated cylinder, an intake throttle position and spark timing of remaining engine cylinders is adjusted to build-up torque reserve in anticipation of a negative torque transient at deactivation. Then, the throttle position or spark timing is adjusted to reduce torque when a positive torque transient is expected. | 12-10-2015 |
| 20170234286 | METHOD FOR MONITORING COMBUSTON PROCESSES IN A COMBUSTION ENGINE | 08-17-2017 |
| 123406270 | Combustion failure responsive (e.g., misfire) | 5 |
| 20110253101 | CYLINDER COMBUSTION PERFORMANCE MONITORING AND CONTROL - An engine control system includes a disturbance module, a misfire threshold determination module, a disturbance ratio module, and a spark control module. The disturbance module determines a disturbance value for a past combustion stroke of a cylinder based on rotation of a crankshaft. The misfire threshold determination module determines a jerk value indicative of a misfire within the cylinder. The disturbance ratio module determines a disturbance ratio for the past combustion stroke based on the disturbance value and the jerk value. The spark control module determines a spark timing for a future combustion stroke of the cylinder, determines a spark timing correction for the future combustion stroke based on the disturbance ratio, determines a corrected spark timing based on the spark timing and the spark timing correction, and generates spark during the future combustion stroke based on the corrected spark timing. | 10-20-2011 |
| 20130206106 | SYSTEM AND METHOD FOR MONITORING AN IGNITION SYSTEM - A system for monitoring and cleaning a spark plug is disclosed. In one example, an amount of carbonaceous soot at the center electrode ceramic of the spark plug is determined in response to a voltage of a sense resistor that is in electrical communication with the spark plug. The system may institute spark plug cleaning after carbonaceous soot is detected so that the possibility of engine misfire may be reduced. | 08-15-2013 |
| 20140352662 | COMBUSTION STATE DETERMINATION DEVICE FOR INTERNAL COMBUSTION ENGINE - A spark ignition type internal combustion engine | 12-04-2014 |
| 20150369162 | Gasoline Particulate Reduction Using Optimized Port and Direct Injection - Additional approaches for the reduction of particulate emissions in gasoline engines using optimized port+direct injection are described. These embodiments include control of the amount of directly injected fuel so as to avoid a threshold increase in particulates due to piston wetting and reduction of cold start emissions by use of air preheating using variable valve timing. | 12-24-2015 |
| 20220136478 | INTERNAL-COMBUSTION-ENGINE COMBUSTION STATE CONTROL APPARATUS - The internal-combustion-engine combustion state control apparatus includes an ignition control means that generates two or more ignition signals during a single compression stroke or a single combustion stroke of an internal combustion engine, a high voltage means that makes an ignition plug, provided in a combustion chamber of the internal combustion engine, perform an ignition discharge based on the ignition signal, an ignition-discharge parameter detection circuit that detects a parameter indicating a state of the ignition discharge, an ignition-discharge duration detection means that detects two or more ignition discharge durations, based on an output signal of the ignition-discharge parameter detection circuit, and an abnormal-combustion determination means that diagnoses a combustion state of the internal combustion engine, based on at least one of the two or more ignition discharge durations; an abnormal-combustion-suppression control means is made to operate based on the result of a determination by the abnormal-combustion determination means. | 05-05-2022 |
| 123406280 | Combustion condition sensed by optical sensor | 1 |
| 20100186715 | ION CURRENT DETECTOR - The ion current detector includes: an ion bias circuit for supplying a bias voltage to an electrode of the ignition plug so as to cause the ignition plug to generate a spark discharge; and an ion current detection circuit for detecting an ion current generated in a combustion chamber by the spark discharge and for amplifying the detected ion current to output an ion current detection signal. The ion current detection circuit amplifies the ion current at an ion current amplification factor switched between a time when an ignition signal is supplied and a time when the ignition signal is not supplied. Specifically, when the ignition signal is supplied, the ion current amplification factor is set to a low value (approximately 50). When the ignition signal is not supplied, the ion current amplification factor is set to a high value (250 or more). | 07-29-2010 |
| 123406290 | Engine knock responsive | 40 |
| 20090071440 | DIRECT INJECTION SPARK IGNITION INTERNAL COMBUSTION ENGINE AND FUEL INJECTION CONTROL METHOD FOR SAME ENGINE - A direct injection spark ignition internal combustion engine includes a fuel injection controller preventing and/or suppressing engine knocking by retarding a fuel injection timing near an intake stroke bottom dead center. The fuel injection controller retards the fuel injection timing beyond a predetermined time by injecting a required amount of fuel through two or more split injections, and the time at which to end the last split injection is set to a time later than the predetermined time. | 03-19-2009 |
| 20100012088 | ENGINE CONTROL INCLUDING KNOCK COMPENSATION - Systems and methods are described, including one example method of controlling an engine having a cylinder with at least one valve operated by a variable valve mechanism (VVM) having a sensor coupled to the valve, the method comprising: adjusting at least one operating parameter in response to an indication of detonation of a combustible mixture in the cylinder, the indication based on the sensor coupled to the valve. | 01-21-2010 |
| 20110083640 | METHOD OF CONTROLLING KNOCKING IN AN INTERNAL COMBUSTION ENGINE EQUIPPED WITH A DEVICE FOR CONTROLLING THE OPENING OF INLET VALVES - A method of controlling knocking in an internal combustion engine equipped with a device for controlling the opening of inlet valves; the control method includes the phases of: determining the occurrence of an excessive knocking in the cylinder of the internal combustion engine; and decreasing the mass of air sucked into the cylinder in which an excessive knocking has occurred by acting on the control device controlling the inlet valves of the cylinder. | 04-14-2011 |
| 20110139118 | 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. | 06-16-2011 |
| 20110139119 | APPARATUS FOR ENGINE CONTROL - An engine control apparatus is provided with an engine, an ignition device, a valve timing changing mechanism, an intake valve close timing detecting device, a supercharger and a controller. The engine achieves a Miller cycle by the valve timing changing mechanism setting an intake valve close timing to occur after a bottom dead center timing. The controller controls an ignition timing of the ignition device, the open timing of the intake valve and the close timing of the intake valve. The controller retards the ignition timing during supercharging and when a detected value of the intake valve close timing is earlier than a target value of the intake valve close timing by at least a prescribed value in comparison with a situation in which the detected value matches the target value of the intake valve close timing. | 06-16-2011 |
| 20110174267 | METHOD AND SYSTEM FOR CONTROLLING FUEL USAGE - Methods and systems are provided for improving fluid 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. | 07-21-2011 |
| 20110174268 | 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 knock control fluid based on engine operating conditions and the composition of the injected fluid. One or more engine parameters, such as EGR, VCT, boost, throttle position, and CMCV, are coordinated with the direct injection to reduce torque and EGR transients. | 07-21-2011 |
| 20110239986 | SPARK-IGNITION ENGINE CONTROL METHOD AND SYSTEM - When preignition is detected, and an engine speed is less than a predetermined value (Nex), an air/fuel ratio is enriched (S | 10-06-2011 |
| 20120073543 | KNOCK CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A knock correction amount computation portion computes, on the basis of intensity of a knock in a case where the presence of an occurrence of the knock is determined, a knock correction amount by which to move a spark timing of the internal combustion engine to be on a retard side and returns the knock correction amount to be back on an advance side in a case where the absence of an occurrence of a knock is determined. In a case where a value of the knock correction amount to be on the retard side becomes equal to or exceeds a predetermined value, the knock correction amount computation portion limits and holds the knock correction amount at the predetermined value and returns the limited knock correction amount to be back on the advance side in a case where the absence of an occurrence of a knock is determined. | 03-29-2012 |
| 20120111304 | METHOD AND SYSTEM FOR CONTROLLING FUEL USAGE - Methods and systems are provided for improving fluid 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. | 05-10-2012 |
| 20130008410 | METHOD AND SYSTEM FOR CONTROLLING FUEL USAGE - Methods and systems are provided for improving fluid 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. | 01-10-2013 |
| 20130160739 | Control Device and Control Method for Internal Combustion Engine - Because opening of a flow enhancement valve affects not only a flow but also a flow rate, when the opening of the flow enhancement valve is transiently changed, if an ignition correction control is conducted on the basis of a relationship obtained in a steady operation state of the flow enhancement valve opening and the ignition timing, there occurs such a drawback that the ignition timing is set to a retard side or an advance side of the optimal point. In a control device for an internal combustion engine having a flow enhancement valve, an intake air quantity flowing into a cylinder is calculated on the basis of the intake air quantity detected by an air flow sensor, a rotating speed, and an operating state of the flow enhancement valve, a turbulent intensity index within the cylinder is calculated on the basis of the rotating speed, the intake air quantity flowing into the cylinder, and the operating state of the flow enhancement valve, and an ignition timing is calculated on the basis of the rotating speed, the intake air quantity flowing into the cylinder, and the turbulent intensity index. | 06-27-2013 |
| 20130180502 | 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 knock control fluid based on engine operating conditions and the composition of the injected fluid. One or more engine parameters, such as EGR, VCT, boost, throttle position, and CMCV, are coordinated with the direct injection to reduce torque and EGR transients. | 07-18-2013 |
| 20130255628 | Dual Fuel Engine System And Method Of Operating - A dual fuel engine operates on a gaseous fuel and a liquid fuel. The engine comprises a supply of gaseous fuel controlled by a first valve, a supply of compression ignitable liquid fuel controlled by a second valve, a control unit for controlling the supply of gaseous fuel and liquid fuel to each combustion chamber in the engine, and at least one knock sensor arranged to detect knock in each combustion chamber and to transmit an output signal proportional to the detected level of knock to the control unit. If knock is detected, the amount of gaseous fuel injected will be reduced while the amount of liquid fuel will be increased. The engine control system will subsequently adapt to the lower grade fuel and perform a calibration to operate as close as possible to the knock limit for the particular fuel. | 10-03-2013 |
| 20140034012 | 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. | 02-06-2014 |
| 20150027409 | IGNITION TIMING CONTROL DEVICE AND IGNITION TIMING CONTROL SYSTEM - An ignition timing control device ( | 01-29-2015 |
| 123406300 | Fuel quality or composition signal responsive | 6 |
| 20080236546 | COMBUSTION CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE - In an embodiment, the invention provides an internal combustion engine, including a first fuel injector that supplies a first fuel to a first predetermined region in a combustion chamber, and a second fuel injector that supplies a second fuel to a second predetermined region in the combustion chamber. The second fuel has an octane number that is different than an octane number of the first fuel, and the second predetermined region is different from the first predetermined region. An ignition device is configured to start ignition of one of the first and second fuels based on an ignition signal. An operation condition detector detects at least one engine operating condition. A controller is configured to provide the ignition signal to the ignition device and to determine which one of the first and second fuels to ignite by the ignition device based on the engine operation condition. | 10-02-2008 |
| 20090031987 | IMPROPER FUEL MIXING DETERMINING APPARATUS FOR INTERNAL COMBUSTION ENGINE - If improper fuel (light oil or kerosene) is mixed into fuel (gasoline) supplied to the engine, a knock limit of an ignition timing is retarded. Based on such a characteristic, every when knocking is detected based on a detection signal from a knock sensor, the ignition timing is stored as the knock occurring ignition timing and the ignition timing is retarded by a predetermined amount. After repeating the above processes, it is determined whether the knock occurring ignition timing is retarded more than a determination value (for example, a retarded limit value of the knock occurring ignition timing in a case that proper gasoline is served). When the knock occurring ignition timing is retarded more than the determination value, it is determined that the improper fuel is mixed in the fuel. | 02-05-2009 |
| 20090038585 | Hybrid Vehicle Propulsion System Utilizing Knock Suppression - A hybrid vehicle propulsion system and method of operation have been provided. As one example, the system comprises an internal combustion engine including at least a combustion chamber configured to propel the vehicle via at least a drive wheel, a motor configured to propel the vehicle via at least a drive wheel, an energy storage device configured to store energy that is usable by the motor to propel the vehicle, a fuel system configured to deliver gasoline and alcohol to the combustion chamber in varying relative amounts, a control system configured to operate the motor to propel the vehicle and to vary the relative amounts of the gasoline and alcohol provided to the combustion chamber in response to an output of the motor. | 02-12-2009 |
| 20110303187 | IGNITION TIMING CONTROLLER FOR INTERNAL COMBUSTION ENGINE - An ignition timing controller for an engine includes basic knock-limit ignition timing calculation means that calculates a basic knock-limit ignition timing on the basis of an operating state of the engine; learning-region variation calculation means that learns the knock-limit ignition timing of the engine in two operating regions and thereby calculates a learning-region variation due to octane number and a learning-region variation due to humidity in one of the operating regions; estimated variation calculation means that estimates a variation due to octane number and a variation due to humidity in a present operating state on the basis of the learning-region variation due to octane number and the learning-region variation due to humidity; and knock-limit ignition timing calculation means that calculates the knock-limit ignition timing in the present operating state on the basis of the basic knock-limit ignition timing, the variation due to octane number, and the variation due to humidity. | 12-15-2011 |
| 20150040862 | METHOD OF MONITORING EGR SYSTEM - A method of monitoring an EGR system includes setting up an ignition timing map depending on EGR efficiency when the EGR system operates normally. An output value reflecting the driving state of a vehicle is divided into an active area and an inactive area. A detected value of ignition timing depending on the occurrence of knocking for the active and inactive areas is learned and stored. When knocking occurs in the active area, a corrected value of ignition timing influenced by only the operation of the EGR system is extracted using the difference between the detected values of ignition timing learned in the active and inactive areas. The amount of variation in the EGR efficiency influenced by the operation of the EGR system is measured by measuring the EGR efficiency by applying the corrected value of ignition timing to the ignition timing map. | 02-12-2015 |
| 20150053177 | METHOD AND SYSTEM FOR KNOCK CONTROL - Methods and systems are provided for improving engine knock tolerance, in particular when rapidly ramping in LP-EGR from low levels of EGR. Until a desired LP-EGR rate is achieved, fuel may be delivered as a split injection with at least an intake stroke injection and a compression stroke injection to compensate for the transport delay in EGR filling the intake system. Subsequently, single fuel injection may be resumed. | 02-26-2015 |
| 123406330 | With modifying or updating memory (i.e., learning) | 3 |
| 20090031989 | IGNITION TIMING CONTROL APPARATUS AND IGNITION TIMING CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - In an ignition timing control apparatus for an engine, a KCS learning value learned when the engine is in a given operating state is used in an ignition timing control executed when the engine is in the other operating state. An estimated knocking occurrence ignition timing is set based on a most retarded ignition timing using the KCS learning value. A final ignition timing is set by changing a KCS feedback correction value based on whether knocking occurs when ignition is performed at the estimated knocking occurrence ignition timing. When a point indicating the engine operating state moves into a region where it is difficult to set the estimated knocking occurrence ignition timing, the KCS feedback correction value is changed to retard the final ignition timing, and the final ignition timing is set using the KCS learning value and the changed KCS feedback correction value. | 02-05-2009 |
| 20090241898 | METHOD OF CONTROLLING THE SPARK LEAD OF AN INTERNAL COMBUSTION ENGINE - A method of controlling the spark lead of an internal combustion engine having at least one cylinder fitted with a spark plug; the method including the steps of: determining a standard spark lead value; determining an engine knock index in the cylinder; calculating a correction factor as a function of the engine knock index; determining a modified spark lead value by applying the correction factor to the standard spark lead value; and controlling the spark plug using the modified spark lead value. The correction factor is calculated by statistically analyzing a number of engine knock indexes to calculate a cumulative distribution; comparing the cumulative distribution with at least one target value; and modifying the current correction factor value as a function of the comparison between the cumulative distribution and the target value. | 10-01-2009 |
| 20100037859 | Control device for internal combustion engine, control method, program for performing control method - An engine ECU runs a program that detects the speed of an engine, a depression amount of an accelerator (ACC) and a vehicle speed, and determines that the vehicle being started from an idle state, if the ACC is more than an ACC threshold value or if the a time differential value (DACC) of the depression amount of the accelerator is more than a DACC threshold value. In addition, the program also detects an intake air temperature (TA), and if the TA is more than a TA threshold value, calculates an air flow guard from a map, which is defined to largely limit the amount of intake air as a KCS learning value is large to a retard side or as the TA is high. | 02-18-2010 |
| 123406340 | Modification of knock signal by engine operating condition signal | 5 |
| 20090013964 | METHOD AND APPARATUS FOR ELIMINATING SPARK-KNOCK IN AN ENGINE - An apparatus for minimizing spark-knock within a combustion chamber of a spark-ignition internal combustion engine, whereby a control vane mounted inside the intake runner is arranged to direct a fuel-air charge to a region inside the combustion chamber where spark-knock has been empirically determined to occur. | 01-15-2009 |
| 20090038586 | Hybrid Vehicle Propulsion System Utilizing Knock Suppression - A hybrid propulsion system for a vehicle and method of operation are provided. As one example, the system comprises an engine including at least one combustion chamber, a motor configured to selectively propel the vehicle via the drive wheel, a fuel system configured to deliver a first substance and a second substance to the combustion chamber in varying relative amounts, wherein the first substance includes a fuel and the second substance includes a greater concentration of a knock suppressing substance than the first substance; and a control system configured to operate the fuel system to vary the relative amounts of the first substance and the second substance delivered to the combustion chamber in response to an operating condition while operating the motor to propel the vehicle. | 02-12-2009 |
| 20120186556 | METHOD FOR ADAPTING AN ENGINE TO THE FUEL GRADE BY INCREMENTING THE INITIAL OCTANE NUMBER OF THE FUEL - A method for adapting an engine to an octane number of fuel by incrementing an initial octane number. Starting with a reference setting of a 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 higher octane number: when a top dead center counter, incremented if the advance correction in the current zone is lower than a predetermined threshold, exceeds a predetermined threshold, or when a counter of the number of zones, in which the advance correction loop is lower than another threshold value, exceeds a multi-zone threshold. | 07-26-2012 |
| 20160377500 | SYSTEMS AND METHODS FOR DETECTION OF ENGINE COMPONENT CONDITIONS VIA EXTERNAL SENSORS - In one embodiment, a method is provided. The method includes receiving a plurality of signals representative of an engine noise transmitted via a plurality of noise sensors, wherein the noise sensors are disposed in a grid about an engine. The method further includes receiving a knock sensor signal representative of an engine noise transmitted via a knock sensor. The method additionally includes deriving a combustion event based on the knock sensor signal, and deriving an engine condition based on the plurality of signals and the combustion event. The method also includes communicating the engine condition. | 12-29-2016 |
| 123406350 | Engine operating condition is load or speed | 1 |
| 20120192833 | INTERNAL COMBUSTION ENGINE CONTROL APPARATUS - An operation status value detection unit detects two or more operation status values indicating an operation status of an internal combustion engine. A filtering processing unit applies filtering processing to the detected operation status values, and an operation status value difference calculation unit calculates the difference between the filter-processed operation status value and the corresponding non-filter-processed operation status value so as to calculate two or more operation status value differences. An operation status value difference normalization unit normalizes the two or more operation status value differences, based on predetermined reference values for the two or more operation status values, so as to calculate two or more normalized operation status value differences; and a transient correction unit corrects a control amount for controlling output of the internal combustion engine, based thereon, when the engine is in a transient-operation mode. | 08-02-2012 |
| 123406370 | Having specific knock detecting means | 10 |
| 20090078234 | METHOD AND SYSTEM FOR CLOSED LOOP COMBUSTION CONTROL OF A LEAN-BURN RECIPROCATING ENGINE USING IONIZATION DETECTION - A system and method for controlling knock in a lean burn internal combustion (IC) engine includes a spark plug having an electrode, and an electrical circuit configured to provide a first voltage to the electrode and detect an ion current during a thermal-ionization phase of the combustion process, and provide a second voltage to the electrode to create a spark and initiate a combustion process within a combustion chamber. The engine includes a controller configured to monitor the ion current for a knock condition that includes at least an incipient knock condition, determine a spark crank angle timing of the IC engine where the incipient knock occurs, and adjust the spark timing of the IC engine to operate at a crank angle that does not exceed a threshold level beyond an incipient knock set point. | 03-26-2009 |
| 20090101109 | METHOD AND DEVICE FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE - In a method and a device for controlling an internal combustion engine ( | 04-23-2009 |
| 20090159044 | Ignition control system - An ignition control system which reduces decrease in output of the internal combustion engine and increase in exhaust gas temperature when one spark plug alone is used for ignition is provided. The ignition control system is used for an engine having cylinders, each of which has two spark plugs. The ignition control system includes a first controller having a first ignition timing control section for controlling ignition timing of a first group of spark plugs including a first spark plug of the two spark plugs in each cylinder and a second controller having a second ignition timing control section for controlling ignition timing of a second group of spark plugs including a second spark plug of the two spark plugs in each cylinder. The first and second ignition timing control sections correct ignition timing according to predetermined parameters when one of the two spark plugs is not used in at least one cylinder. | 06-25-2009 |
| 20090217908 | IGNITION TIMING CONTROLLING APPARATUS AND IGNITION TIMING CONTROLLING METHOD FOR INTERNAL COMBUSTION ENGINE - An engine ECU executes a program including the steps of: calculating a knock magnitude N by dividing an integrated value lpkknk obtained by integrating the magnitude of vibration in the knock detection gate by BGL; controlling ignition timing according to a result of comparison between knock magnitude N and a determination value VJ; stopping updating of a standard deviation σ when it is determined that determination value VJ to be compared with knock magnitude N is to be changed; updating a median value VM by increasing an update amount of median value VM; and updating BGL according to median value VM and standard deviation σ. | 09-03-2009 |
| 20140116383 | CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - A vibration waveform of a knock-specific frequency component of an internal combustion engine is calculated over a plurality of ignition cycles of the internal combustion engine according to an output of a knock sensor and an output of a crank angle sensor. An actual ignition timing is calculated by detecting a position corresponding to a crank angle at which a standard deviation of the vibration waveform exceeds a predetermined first determination level as a vibration position by combustion of the internal combustion engine. | 05-01-2014 |
| 20150040866 | ENGINE SYSTEM FOR VESSEL PROPULSION DEVICE AND VESSEL INCLUDING THE SAME - An engine system for a vessel propulsion device includes an engine including an intake amount adjusting unit and an ignition plug, and configured to generate a drive force for the vessel propulsion device. The engine system includes an ignition timing control unit, a knocking detecting unit, a knocking retard control unit that retards the ignition timing of the ignition plug by a unit retard amount when the knocking detecting unit detects knocking, an abnormality judging unit that, when a state where the knocking detecting unit detects knocking at intervals within a predetermined time continues, judges that an abnormality has occurred based on a continued state of knocking detection, and an intake amount limiting unit that limits the intake amount of the engine based on judgment of an abnormality made by the abnormality judging unit. | 02-12-2015 |
| 123406380 | Knock frequency distribution pattern responsive | 4 |
| 20090120410 | IGNITION TIMING CONTROLLING APPARATUS AND IGNITION TIMING CONTROLLING METHOD FOR INTERNAL COMBUSTION ENGINE - A 90° integrated value calculating unit of an engine ECU calculates a 90° integrated value obtained by integrating a magnitude. A calculating unit calculates a knock magnitude by dividing 90° integrated value by a BGL. A value obtained by subtracting a standard deviation σ from a median value of 90° integrated value is determined as the BGL. An ignition timing control unit controls the ignition timing depending on whether knock magnitude is equal to or larger than a determination value. A median value calculating unit calculates median value of 90° integrated value. A standard deviation calculating unit calculates standard deviation of 90° integrated value. A first stop unit stops updating of median value and standard deviation when 90° integrated value is smaller than a first threshold value or is equal to or larger than a second threshold value. | 05-14-2009 |
| 20090165746 | DEVICE AND METHOD FOR CONTROLLING IGNITION TIMING OF INTERNAL COMBUSTION ENGINE - An engine ECU executes a program including: a step (S | 07-02-2009 |
| 20100018500 | Speed Dependent Knock Control - A system and method for controlling knock according to engine speed is disclosed. A knock control system has at least two settings, a first setting used for a first speed range and a second setting used for a second speed range. In another embodiment, knock may be controlled according to ambient noise measured directly within the motor vehicle. | 01-28-2010 |
| 20120266844 | CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - A control device of an internal combustion engine includes a filter processing portion which performs a filter processing on the vibration level extracted by the vibration level extraction portion, and calculates a vibration level after the filter processing; and an abnormal ignition suppression control portion which compares the vibration level after the filter processing to the abnormal ignition determination value when a retard correction equal to or greater than a predetermined value is performed by the knock control portion, in a case where it is determined that the vibration level after the filter processing is equal to or greater than the abnormal ignition determination value, determines that the abnormal ignition is generated in the internal combustion engine, corrects and controls the combustion control portion in a direction of suppressing the abnormal ignition. | 10-25-2012 |
| 123406410 | Engine cylinder pressure responsive | 9 |
| 20090293842 | IGNITION TIMING CONTROL SYSTEM AND METHOD FOR INTERNAL COMBUSTION ENGINE AND ENGINE CONTROL UNIT - An ignition timing control system for an internal combustion engine, which is capable of properly carrying out ignition timing control over a wide control range, thereby making it possible to improve fuel economy, and is capable of suppressing combustion fluctuation, thereby making it possible to improve drivability. Ignition timing is calculated, when the engine is determined to be in an intense combustion mode, such that a largest in-cylinder pressure angle at which in-cylinder pressure becomes largest converges to a target angle, whereas when the engine is determined to be in a weak combustion mode, the same is calculated by feedback, based on the target angle and combustion state parameters indicative of a combustion state in the cylinder. | 12-03-2009 |
| 20100012089 | FUEL PROPERTY DETECTOR FOR INTERNAL COMBUSTION ENGINE - A fuel property detector for an internal combustion engine determines a cetane number with high accuracy even when a high-cetane fuel is used. | 01-21-2010 |
| 20100043749 | IGNITION CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINES - An ignition control system for a spark ignition internal combustion engine has: over-advancing means for over-advancing an ignition time for a cylinder of the internal combustion engine beyond an MBT; obtaining means for obtaining an adhering fuel amount that is the amount of fuel that adheres to the inner face of the cylinder of the internal combustion engine; and controlling means for controlling the over-advancing means to execute the ignition time over-advancement when the adhering fuel amount obtained by the obtaining means is equal to or larger than a predetermined amount. | 02-25-2010 |
| 20100071659 | CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - This control apparatus estimates a full combustion correspondence period CP, which is the period from an ignition timing SA to a combustion completion time CAe, and controls a VVT advancement amount (burnt gas quantity, overlap period, intake valve open timing) such that the estimated full combustion correspondence period CP coincides with a constant target full combustion correspondence period CPtgt. The full combustion correspondence period CP substantially maintains a one-to-one relation with the VVT advancement amount at which HC, CO | 03-25-2010 |
| 20150316020 | Method And Device For Detecting Auto-Ignitions On The Basis Of Measured And Estimated Internal Cylinder Pressure Values Of An Internal Combustion Engine - A method is disclosed for detecting an auto-ignition in a spark-ignited internal combustion engine having at least one cylinder, wherein values for the combustion chamber pressure are measured during a compression stroke of the internal combustion engine at defined crankshaft angles within an evaluation window, a filtered pressure value is determined from the measured values for the combustion chamber pressure, theoretical pressure values in the combustion chamber that would arise if no combustion took place in the combustion chamber are determined for the defined crankshaft angles, the value of the pressure difference between the filtered pressure value and the theoretical pressure values is calculated, the value of the pressure difference is compared with a specified threshold value, and, if the threshold value is exceeded, an auto-ignition in the combustion chamber is inferred. | 11-05-2015 |
| 20150377166 | INTERNAL COMBUSTION ENGINE SYSTEM - An internal combustion engine system includes: an in-cylinder pressure sensor; a crank angle sensor; and a seal portion that seals a space between an outer face of a housing and a wall surface of a cylinder head. A slope that is a ratio of the amount of decrease in a heat release amount relative to the amount of increase in a crank angle is calculated in a period during an expansion stroke from a combustion end point until an opening timing of an exhaust valve. The existence or nonexistence of an abnormality in the sealing function of the seal portion is determined based on whether or not a ratio of the amount of decrease in the slope to the amount of increase in an engine speed is greater than a threshold value. | 12-31-2015 |
| 123406430 | Responsive to derivative, integral or average of pressure | 3 |
| 20090101110 | METHOD AND DEVICE FOR ASCERTAINING A CYLINDER PRESSURE FEATURE - A method for determining one or more cylinder pressure features for setting the combustion position in an internal combustion engine includes ascertaining a curve of a cylinder pressure or a curve of a cylinder pressure gradient with respect to a crankshaft angle, filtering the curve of the cylinder pressure or the curve of the cylinder pressure gradient using a filter, in order to eliminate a component of a pressure fluctuation brought about by the piston movement in the combustion chamber, and determining at least one cylinder pressure feature from the filtered curve. | 04-23-2009 |
| 20150337790 | Method And Device For Detecting Autoignitions On The Basis Of Measured And Estimated Internal Cylinder Pressure Values Of An Internal Combustion Engine - A method is provided for detecting autoignition in a spark-ignited internal combustion engine, wherein values for the combustion chamber pressure are measured during a compression stroke of the internal combustion engine at defined crankshaft angles within an evaluation window, a filtered pressure value is determined from the measured values for the combustion chamber pressure, and theoretical pressure values in the combustion chamber that would arise if no combustion took place in the combustion chamber are determined for the defined crankshaft angles. The value of the slope between two defined crankshaft angles for filtered pressure values is determined, the value of the slope between two defined crankshaft angles for theoretical pressure values is determined, and a difference of the slope values is calculated therefrom. This difference is compared with a specified threshold value, and, if the threshold value is exceeded, an autoignition in the combustion chamber is inferred. | 11-26-2015 |
| 20160153420 | CONTROLLING COMBUSTION IN PLASMA IGNITION ENGINE | 06-02-2016 |
