| Patent application number | Description | Published |
|---|
| 20090107457 | INTERNAL COMBUSTION ENGINE WITH MULTIPLE SPARK PLUGS PER CYLINDER AND ION CURRENT SENSING - A system and method for operating a multiple cylinder internal combustion engine having at least two spark plugs per cylinder include selectively isolating all but one spark plug associated with the cylinder at least during an ionization current sensing period to reduce or eliminate interference among ionization current signals flowing through more than one spark plug. | 04-30-2009 |
| 20090282810 | ENGINE EXHAUST TEMPERATURE REGULATION - In one example, a method of operating an engine in a vehicle is described. The method comprises delivering a first substance to a cylinder of the engine from a first injector; delivering a second substance to the cylinder of the engine from a second injector, where the second substance has a greater heat of vaporization than the first substance; and increasing injection of the second substance responsive to an exhaust over-temperature condition. | 11-19-2009 |
| 20090308367 | FUEL BASED CYLINDER KNOCK CONTROL - Various systems and methods are described for controlling engine operation of an engine having a plurality of cylinders, each cylinder including a first and second injector for delivering fuel to the cylinder. One example method comprises operating a first cylinder to combust fuel delivered from both the first and second fuel injector of the first cylinder, and operating a second cylinder to combust fuel delivered from only one of the first and second fuel injectors of the second cylinder. One example system comprises both a port injector and a direct injector coupled to both of a first and second cylinder of the engine with a first fuel reservoir coupled to the port injectors and a second fuel reservoir coupled to the direct injectors. The system further includes a controller configured to vary delivery of the fuels from the injectors to the cylinders during differing operating modes. | 12-17-2009 |
| 20100057324 | Ignition Energy Management With Ion Current Feedback To Correct Spark Plug Fouling - A system and method for operating an engine having ionization signal sensing include detecting plug fouling and controlling the engine using progressively more aggressive control strategies if the fouling condition persists. A first control strategy may be used when the number of engine starts or running time are below corresponding thresholds and a second strategy otherwise. The first strategy may employ progressively more aggressive control procedures to eliminate spark plug deposits that may include repetitive sparking, exhaust cycle sparking, increasing engine loading, advancing spark timing, increasing air/fuel ratio, and increasing idle speed, for example. The second strategy may include similar corrective actions employed in a different order and/or to a lesser degree in an attempt to eliminate plug fouling without any noticeable change in engine operation or performance as perceived by the vehicle operator. The control strategies may be applied to individual cylinders, cylinder banks, or all cylinders. | 03-04-2010 |
| 20100057327 | Engine Combustion Control Using Ion Sense Feedback - A system and method for operating an engine having at least two spark plugs per cylinder include controlling at least one actuator to alter combustion within a selected cylinder such that the combustion burn rate determined by ion sense current signals associated with the at least two spark plugs of the selected cylinder approaches a desired combustion burn rate. A desired combustion burn rate is determined based on current engine/vehicle operating and ambient conditions with ion sense signals from each spark plug analyzed to determine combustion timing relative to corresponding ignition timing. Ignition timing and/or other actuators are controlled in response to provide a desired combustion burn rate. | 03-04-2010 |
| 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 |
| 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 |
| 20110139120 | 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 |
| 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 |
| 20110191007 | Method and System for Pre-Ignition Control - Methods and systems are provided for addressing cylinder-to-cylinder imbalances in the incidence of pre-ignition and/or knock. Engine cylinders are fueled based on each cylinder's pre-ignition count to balance the incidence of pre-ignition in each cylinder. The fueling is adjusted to maintain engine exhaust at stoichiometry. | 08-04-2011 |
| 20110202260 | SPARK PLUG DEGRADATION DETECTION - Methods and systems are provided for identifying and indicating degradation of an engine cylinder spark plug. In response to a cylinder misfire event during selected engine operating conditions, followed by an occurrence of a threshold number and/or rate of pre-ignition events in the same cylinder, a controller may determine that the spark plug is degraded. The controller may limit combustion in the cylinder in response to the degradation. Additionally, cylinder pre-ignition mitigating steps may be taken. | 08-18-2011 |
| 20110265758 | Method and System for Pre-Ignition Control - Methods and systems are provided for addressing cylinder pre-ignition by adjusting a spray angle of fuel injected into a cylinder responsive to an indication of pre-ignition. A spray pattern of fuel injected in the cylinder is varied based on a cylinder pre-ignition count to reduce cylinder wall impingement of injected fuel while improving air-fuel mixing in the cylinder. | 11-03-2011 |
| 20110313641 | 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. | 12-22-2011 |
| 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 |
| 20120073542 | 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. | 03-29-2012 |
| 20120102925 | ENGINE EXHAUST TEMPERATURE REGULATION - In one example, a method of operating an engine in a vehicle is described. The method comprises delivering a first substance to a cylinder of the engine from a first injector; delivering a second substance to the cylinder of the engine from a second injector, where the second substance has a greater heat of vaporization than the first substance; and increasing injection of the second substance responsive to an exhaust over-temperature condition. | 05-03-2012 |
| 20120150415 | Ion Sense and Control for Ignition Energy Management - A system and method for operating an engine having ionization signal sensing include detecting plug fouling and controlling the engine using progressively more aggressive control strategies if the fouling condition persists. A first control strategy may be used when the number of engine starts or running time are below corresponding thresholds and a second strategy otherwise. The first strategy may employ progressively more aggressive control procedures to eliminate spark plug deposits that may include repetitive sparking, exhaust cycle sparking, increasing engine loading, advancing spark timing, increasing air/fuel ratio, and increasing idle speed, for example. The second strategy may include similar corrective actions employed in a different order and/or to a lesser degree in an attempt to eliminate plug fouling without any noticeable change in engine operation or performance as perceived by the vehicle operator. The control strategies may be applied to individual cylinders, cylinder banks, or all cylinders. | 06-14-2012 |
| 20120245821 | Method and System for Pre-Ignition Control - Methods and systems are provided for addressing cylinder-to-cylinder imbalances in the incidence of pre-ignition and/or knock. Engine cylinders are fueled based on each cylinder's pre-ignition count to balance the incidence of pre-ignition in each cylinder. The fueling is adjusted to maintain engine exhaust at stoichiometry. | 09-27-2012 |
| 20120245827 | Method and System for Pre-Ignition Control - Methods and systems are provided for addressing cylinder pre-ignition. Each cylinder of an engine may be operated in either a split injection mode or a single injection mode based on the pre-ignition history of the cylinder. The timing and number of injections in the split injection mode is adjusted based on the pre-ignition count of the cylinder. | 09-27-2012 |
| 20120266847 | Method and System for Pre-Ignition Control - Methods and systems are provided for addressing cylinder pre-ignition by adjusting a spray angle of fuel injected into a cylinder responsive to an indication of pre-ignition. A spray pattern of fuel injected in the cylinder is varied based on a cylinder pre-ignition count to reduce cylinder wall impingement of injected fuel while improving air-fuel mixing in the cylinder. | 10-25-2012 |
| 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 |
| 20120330536 | 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. | 12-27-2012 |
| 20130035841 | 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. | 02-07-2013 |
| 20130139786 | METHOD AND SYSTEM FOR PRE-IGNITION CONTROL - Methods and systems are provided for addressing pre-ignition that may be induced in response to actions taken to mitigate a cylinder misfire. An amount of engine load limiting applied may be adjusted to reduce the likelihood pre-ignition while also addressing component over-temperature issues. By limiting an engine load while shutting off fuel in a misfiring cylinder, and while combusting a lean air-fuel mixture in the remaining cylinders, pre-ignition induced by the misfire-mitigating lean combustion conditions can be reduced. | 06-06-2013 |
| 20130245921 | METHOD AND SYSTEM FOR ENGINE AIR CONTROL - Methods and systems are provided for reducing idling torque imbalances between cylinders by actuating a common camshaft to which the cylinders are coupled. The camshaft may be adjusted within camshaft limits during each combustion event of each cylinder. In this way, idling NVH issues may be addressed. | 09-19-2013 |
| 20130263828 | CHARGE AIR COOLER CONTROL SYSTEM AND METHOD - A charge air cooler arrangement, a charge air cooler tank, and method are disclosed. The charge air cooler arrangement includes a charge air cooler having an operable thermal transfer area configured to transfer heat from inside the charge air cooler to outside of the charge air cooler. The charge air cooler arrangement may also include a valve configured to change the operable thermal transfer area from a relatively large area to a relatively small area. | 10-10-2013 |
| 20140000552 | METHOD AND SYSTEM FOR PRE-IGNITION CONTROL | 01-02-2014 |
| 20140000555 | METHOD AND SYSTEM FOR PRE-IGNITION CONTROL | 01-02-2014 |
| 20140000557 | METHOD AND SYSTEM FOR PRE-IGNITION CONTROL | 01-02-2014 |
| 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 |
| 20140047833 | METHOD FOR CONTROLLING A VARIABLE CHARGE AIR COOLER - Embodiments for a charge air cooler are provided. In one example, an engine method comprises during a first mode, decreasing a volume of a charge air cooler in response to a compressor operation upstream of the charge air cooler. In this way, compressor surge may be prevented. | 02-20-2014 |
| 20140048048 | METHOD FOR CONTROLLING A VARIABLE CHARGE AIR COOLER - Embodiments for a charge air cooler are provided. In one example, an engine method comprises increasing intake air flow velocity through a charge air cooler in response to an estimated condensation formation value within the charge air cooler. In this way, condensation accumulation within the charge air cooler may be prevented. | 02-20-2014 |
| 20140048049 | METHOD FOR CONTROLLING A VARIABLE CHARGE AIR COOLER - Embodiments for a charge air cooler are provided. In one example, an engine method comprises increasing intake air flow velocity through a charge air cooler and coordinately adjusting a position of one or more of an intake manifold throttle and a turbocharger wastegate in response to the increased intake air flow velocity to maintain torque. In this way, intake air flow velocity may be increased while maintaining desired torque. | 02-20-2014 |
| 20140075976 | CHARGE AIR COOLER CONDENSATION CONTROL - Embodiments for controlling condensate in a charge air cooler are provided. One example method for an engine comprises cooling intake air through a charge air cooler and adjusting a vibration device of the charge air cooler based on charge air cooler condensation conditions. | 03-20-2014 |
| 20140100074 | CHARGE AIR COOLER CONDENSATE PURGING CYCLE - Methods and systems are provided for purging condensate from a charge air cooler to an engine intake. During an engine deceleration event, the vehicle is downshifted into a lower gear to increase RPM and airflow through a charge air cooler to purge stored condensate to the engine intake. By delivering condensate while an engine is not fueled, misfire events resulting from ingestion of water are reduced. | 04-10-2014 |
| 20140100758 | ENGINE CONTROL SYSTEM AND METHOD - Methods and systems are provided for purging condensate from a charge air cooler to an engine intake. During an engine deceleration event, airflow through a charge air cooler is temporarily increased to purge stored condensate to the engine intake. By delivering condensate while an engine is not fueled, misfire events resulting from ingestion of water are reduced. | 04-10-2014 |
| 20140109568 | METHOD FOR PURGING CONDENSATE FROM A CHARGE AIR COOLER - Methods and systems are provided for performing a pro-active condensate clean-out of a charge air cooler. In response to condensate in a charge air cooler and engine operating conditions, airflow is increased to the intake manifold, purging condensate from the cooler. Engine actuators may also be adjusted to maintain torque demand during the clean-out procedure. | 04-24-2014 |
| 20140109870 | ENGINE CONTROL SYSTEM AND METHOD - Methods and systems are provided for purging condensate from a charge air cooler to an engine intake while reducing misfire events related to the water ingestion. During the purging, a spark timing is adjusted based on the amount of condensate purged per cycle. The spark timing is adjusted differently when the condensate is purged during a tip-in versus a pro-active clean-out routine. | 04-24-2014 |
| 20140109871 | ENGINE CONTROL SYSTEM AND METHOD - Methods and systems are provided for purging condensate from a charge air cooler to an engine intake while reducing misfire events related to the water ingestion. During the purging, a spark timing is adjusted based on the amount of condensate purged per cycle. The spark timing is adjusted differently when the condensate is purged during a tip-in versus a pro-active clean-out routine. | 04-24-2014 |
| 20140110488 | ENGINE CONTROL COORDINATION WITH GRILLE SHUTTER ADJUSTMENT AND AMBIENT CONDITIONS - Methods and systems are provided for reducing corrosion of a charge air cooler and preventing engine misfire due to condensate formation. In response to a condensate forming region in a charge air cooler, a grille shutter system is adjusted, moving the condensate region to a different location in the charge air cooler. Grille shutter orientation may also be controlled in response to vehicle operating conditions and condensate-forming weather conditions. | 04-24-2014 |
| 20140120820 | CONDENSATION CONTROL IN A CHARGE AIR COOLER BY CONTROLLING CHARGE AIR COOLER TEMPERATURE - Methods and systems are provided for reducing corrosion of a charge air cooler and reducing engine misfire due to condensate formation. In response to charge air cooler outlet temperature, electric fan operation and grille shutter opening is adjusted. Electric fan operation and grille shutter opening may also be controlled in response to vehicle operating conditions. | 05-01-2014 |
| 20140123963 | SYSTEM AND METHOD TO IDENTIFY AMBIENT CONDITIONS - Methods and systems are provided for estimating an ambient humidity value used to determine condensate formation in a charge air cooler. The ambient humidity value is determined from charge air cooler efficiency and windshield wiper speed thresholds. The humidity value is used to calculate an amount of condensate in a charge air cooler and control engine systems to reduce condensate formation and engine misfire. | 05-08-2014 |
| 20140128221 | METHOD AND SYSTEM TO CONTROL VEHICLE OPERATION - Methods and systems are provided for performing a multiple gear downshift of a transmission gear by transiently operating in an intermediate gear. In response to ambient humidity and a condensate level in a charge air cooler, the transmission gear may be downshifted from a higher gear to an intermediate gear, and then to a requested lower gear. Downshifting through an intermediate gear may also be controlled based on the gear shift request. | 05-08-2014 |
| 20140136081 | SPARK PLUG DEGRADATION DETECTION - Methods and systems are provided for identifying and indicating degradation of an engine cylinder spark plug. In response to a cylinder misfire event during selected engine operating conditions, followed by an occurrence of a threshold number and/or rate of pre-ignition events in the same cylinder, a controller may determine that the spark plug is degraded. The controller may limit combustion in the cylinder in response to the degradation. Additionally, cylinder pre-ignition mitigating steps may be taken. | 05-15-2014 |
| 20140150755 | BOOSTED ENGINE CHARGE AIR COOLER CONDENSATION REDUCTION DEVICE - Methods and systems are provided for providing auxiliary heat to a charge air cooler to reduce condensate formation. A coolant valve may control the delivery of heated engine coolant to the inlet side of the charge air cooler. The coolant valve may be adjusted based on condensate formation in the charge air cooler and a temperature at the charge air cooler outlet. | 06-05-2014 |
| 20140150756 | CHARGE AIR COOLER COMPONENT DIAGNOSTICS - Embodiments for a charge air cooler are provided. In one example, a method comprises adjusting an operating parameter in response to a degraded grille shutter, the degraded grille shutter determined based on a temperature difference across a charge air cooler. In this way, degradation of the charge air cooler or engine may be reduced. | 06-05-2014 |
| 20140157772 | CONTROLLED TRANSIENT ACCELERATION TO EVACUATE CONDENSATE FROM A CHARGE AIR COOLER - Methods and systems are provided for purging condensate from a charge air cooler. In response to condensate in a charge air cooler during a tip-in, airflow is increased at a controlled rate to the intake manifold, purging condensate from the charge air cooler. | 06-12-2014 |
| 20140158089 | CONTROLLING CHARGE AIR COOLER CONDENSATION BY USING HEATED INTAKE AIR - Methods and systems are provided for adjusting the temperature of intake air entering an engine. In response to condensate in a charge air cooler and engine operating conditions, the position of an induction valve is adjusted to draw in air from a warm or cool air duct. Induction valve operation is further controlled to reduce fuel economy losses. | 06-12-2014 |
| 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 |
| 20140261318 | METHOD AND SYSTEM FOR PRE-IGNITION CONTROL - Methods and systems are provided for pre-ignition control. A pre-ignition mitigating enrichment is deactivated in response to a tip-out but reactivated in response to a subsequent tip-in. By preemptively enriching the engine, repeated pre-ignition due at subsequent tip-ins is reduced. | 09-18-2014 |
| 20140288808 | AUTOMATIC ENGINE DE-CHOKING - A method may comprise automatically de-choking an engine and cranking the engine in response to an engine flood event, wherein automatically de-choking the engine comprises automatically cutting fuel to the engine while opening an air intake throttle. | 09-25-2014 |
| 20140303873 | POSITION DETECTION FOR LOBE SWITCHING CAMSHAFT SYSTEM - Systems and methods for determining an active cam profile from a plurality of cam profiles is disclosed. The systems and methods may be used to determine how to operate an engine torque actuator or provide an indication of cam profile switching degradation. | 10-09-2014 |
| 20140316673 | SYSTEM AND METHOD FOR PROVIDING SPARK TO AN ENGINE - An approach for supplying spark to engine cylinders is disclosed. In one example, the approach increases ignition energy supplied to spark plugs of deactivated cylinders to reduce the possibility of spark plug fouling for the deactivated cylinders. | 10-23-2014 |
| 20140328665 | WASTEGATE CONTROL TO REDUCE CHARGE AIR COOLER CONDENSATE - Methods and systems are provided for adjusting a wastegate in response to condensate forming conditions in a charge air cooler (CAC). In one example, a wastegate may be opened in response to an induction pressure greater than a threshold pressure when the induction pressure is greater than required to produce a manifold pressure required for a torque demand. Further, a compressor recirculation valve may be opened to further reduce the induction pressure during certain driving conditions. | 11-06-2014 |
| 20140331975 | SYSTEM AND METHOD FOR OPERATING A DIRECT INJECTION FUEL PUMP - Methods and systems are provided for a direct injection fuel pump. The methods and systems selectively operate the direct injection fuel pump with varying levels of efficiency. | 11-13-2014 |
| 20140343827 | VARIABLE DISPLACEMENT ENGINE CONTROL SYSTEM AND METHOD - Methods and systems are provided for adjusting an ignition energy provided to an engine cylinder upon reactivation from a VDE mode of operation. Ignition energy is increased by increasing an ignition coil dwell time and/or an ignition coil strike frequency. The increased ignition energy improves combustion stability during the transition out of the VDE mode of operation. | 11-20-2014 |
| 20140350823 | ENHANCED VDE KNOCK CONTROL - Systems and methods for adjusting ignition timing to one or more cylinders of a variable displacement engine responsive to a knock indication are described herein. In one particular example, during a partial cylinder mode, ignition timing to one or more cylinders may be adjusted responsive to a knock indication based on the number of cylinders deactivated; whereas during the full cylinder mode, ignition timing for all cylinders are adjusted responsive to a knock indication. Thereby, the systems and methods described allow a larger partial cylinder operating window that has a benefit of enhancing a vehicle's fuel economy. | 11-27-2014 |
| 20140352659 | METHODS AND SYSTEMS FOR CYLINDER BANK MISFIRE DETECTION AND REACTIVATION - Various systems and methods are described for deactivation and reactivation of a cylinder bank in a V-engine. In one example, the cylinder bank is deactivated responsive to an indication of misfire based on crankshaft acceleration and exhaust air fuel ratio. The cylinder bank is reactivated sequentially based on exhaust catalyst temperature. | 12-04-2014 |
| 20140352661 | METHOD FOR PURGING CONDENSATE FROM A CHARGE AIR COOLER - Methods and systems are provided for cleaning out condensate stored at a charge air cooler. In response to increased condensate accumulation at a charge air cooler, airflow through the engine is increased to purge the condensate while an engine actuator is adjusted to maintain engine torque. Combustion stability issues of engine cylinders are addressed by adjusting fueling of each cylinder individually during condensate ingestion. | 12-04-2014 |
| 20140352663 | METHOD FOR PURGING CONDENSATE FROM A CHARGE AIR COOLER - Methods and systems are provided for cleaning out condensate stored at a charge air cooler. In response to increased condensate accumulation at a charge air cooler, airflow through the engine is increased to purge the condensate while an engine actuator is adjusted to maintain engine torque. Combustion stability issues of engine cylinders are addressed by adjusting fueling of each cylinder individually during condensate ingestion. | 12-04-2014 |
| 20140360477 | SYSTEM AND METHOD FOR DETERMINING VALVE OPERATION - Systems and methods for determining operation of a cylinder deactivating/reactivating device are disclosed. In one example, degradation of the cylinder deactivating/reactivating device is based on intake manifold oxygen concentration. | 12-11-2014 |
| 20150025723 | METHODS AND SYSTEMS FOR OPERATING AN ENGINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, engine operation is adjusted in response to a change in engine operating conditions that result in a fractional amount of cylinder charge comprised of exhaust gas changing by more than a threshold percentage. The approaches describe may improve vehicle drivability and fuel economy. | 01-22-2015 |
| 20150047607 | METHOD AND SYSTEM FOR TORQUE CONTROL - Methods and systems are provided for enabling a smooth transmission shift in a hybrid vehicle configured with a motor hybrid transmission. During an initial part of a transmission upshift, spark timing may be advanced from MBT to expedite torque reduction. Once engine speed has sufficiently reduced, and is within a threshold range of the desired engine speed, spark timing may be retarded until the transmission shift is completed. | 02-19-2015 |
| 20150051809 | VARIABLE DISPLACEMENT ENGINE CONTROL SYSTEM AND METHOD - Methods and systems are provided for improving the performance of a variable displacement engine. Split injection and spark retard may be used in active cylinder during a VDE mode to heat an exhaust catalyst and extend the duration of VDE mode operation. Split injection and spark retard may also be used in reactivated cylinders at a time of cylinder reactivation to improve restart combustion stability. | 02-19-2015 |
| 20150051816 | VARIABLE DISPLACEMENT ENGINE CONTROL SYSTEM AND METHOD - Methods and systems are provided for improving the performance of a variable displacement engine. Split injection and spark retard may be used in active cylinders during a VDE mode to heat an exhaust catalyst and extend the duration of VDE mode operation. Split injection and spark retard may also be used in reactivated cylinders at a time of cylinder reactivation to improve restart combsution stability. | 02-19-2015 |
| 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 |
| 20150059686 | ENGINE CONTROL FOR A LIQUID PETROLEUM GAS FUELED ENGINE - A method for an engine, comprising: during a first condition comprising a high engine temperature, injecting a first quantity of liquid petroleum gas into a first engine cylinder at a first timing during an intake stroke; and injecting a second quantity of liquid petroleum gas into the first engine cylinder at a second timing during a compression stroke following the intake stroke. In this way, combustion knock and cylinder pre-ignition may be mitigated without retarding spark ignition and/or limiting engine load, thereby allowing for maximum engine performance. | 03-05-2015 |
| 20150059687 | METHOD FOR CONTROLLING FUEL PRESSURE FOR A LPG ENGINE - Methods and systems are provided for adjusting a phase of gaseous fuel delivered to fuel injectors of a fuel delivery system. In one example, a method may include adjusting a fuel pressure in a fuel delivery system to deliver fuel in each of a liquid and a gaseous phase during different engine operating conditions. The fuel pressure may be based on a temperature, composition, and desired phase of the fuel. | 03-05-2015 |
| 20150075487 | SYSTEMS AND METHODS FOR CONTROLLING IGNITION ENERGY DURING EXHAUST STROKE COMBUSTION OF GASEOUS FUEL TO REDUCE TURBO LAG - Methods and systems are provided for adjusting ignition energy of the spark required for combustion of gaseous fuel injected during an exhaust stroke of a cylinder combustion event to reduce turbo lag. In one example, a method includes combusting a first amount of gaseous fuel during a compression stroke of a cylinder combustion event using a first ignition energy and combusting a second amount of gaseous fuel during an exhaust stroke of the cylinder combustion event using a second ignition energy, the second ignition energy lower than the first ignition energy. The second ignition energy may be adjusted based on in-cylinder pressure and cylinder load. | 03-19-2015 |
| 20150075492 | SYSTEMS AND METHODS FOR INJECTING GASEOUS FUEL DURING AN EXHAUST STROKE TO REDUCE TURBO LAG - Methods and systems are provided for injecting and combusting an amount of gaseous fuel during an exhaust stroke of a cylinder combustion event in order to reduce turbo lag and reduce a duration of time required for an exhaust catalyst to light-off during transient events. In one example, when an increase in torque demand is greater than a threshold, a first amount of gaseous fuel may be combusted during a compression stroke of a cylinder combustion event and a second amount of gaseous fuel may be combusted during an exhaust stroke of the combustion event. The second amount may be adjusted based on the increase in torque demand. | 03-19-2015 |
