Patent application number | Description | Published |
20110265453 | Methods and Systems for Variable Displacement Engine Control - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection. | 11-03-2011 |
20110265454 | Methods and Systems for Variable Displacement Engine Control - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection. | 11-03-2011 |
20110265771 | Methods and Systems for Variable Displacement Engine Control - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection. | 11-03-2011 |
20120285161 | Methods and Systems for Variable Displacement Engine Control - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection. | 11-15-2012 |
20130231844 | NON-INTRUSIVE EXHAUST GAS SENSOR MONITORING - A method for monitoring an exhaust gas sensor coupled in an engine exhaust is provided. In one embodiment, the method comprises indicating exhaust gas sensor degradation based on a time delay and line length of each sample of a set of exhaust gas sensor responses collected during a commanded change in air-fuel ratio. In this way, the exhaust gas sensor may be monitored utilizing robust parameters in a non-intrusive manner. | 09-05-2013 |
20130231847 | NON-INTRUSIVE EXHAUST GAS SENSOR MONITORING - Systems and methods for monitoring an exhaust gas sensor coupled in an engine exhaust are provided. In one example approach, a method comprises indicating exhaust gas sensor degradation based on a downstream exhaust gas sensor responding before the upstream exhaust gas sensor during a commanded change in air-fuel ratio. | 09-05-2013 |
20130291830 | METHODS AND SYSTEMS FOR ENGINE STARTING DURING A SHIFT - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, torque demand of a driveline after a shift is forecast to determine if it is desirable to start the engine early so that engine torque is available after the shift. The approach may improve vehicle torque response. | 11-07-2013 |
20130296102 | METHODS AND SYSTEMS FOR EXTENDING REGENERATIVE BRAKING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an electrical load may be automatically activated to consume electrical energy produced during driveline braking so that driveline braking may be extended. The electrical load may be a windscreen heater or other device. | 11-07-2013 |
20130296118 | METHODS AND SYSTEMS FOR A VEHICLE DRIVELINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline operating modes may be manually selected to improve hybrid driveline operation during off road conditions. The approaches may improve vehicle drivability and reduce driveline degradation. | 11-07-2013 |
20130296119 | METHODS AND SYSTEMS FOR CONDITIONALLY ENTERING A DRIVELINE SAILING MODE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a driveline may selectively enter a sailing mode to provide quick driveline torque response with reduced impact on fuel economy. | 11-07-2013 |
20130296120 | METHODS AND SYSTEMS FOR DRIVELINE SAILING MODE ENTRY - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, entry conditions for entering a driveline sailing mode are described. Driveline sailing mode may improve driveline torque response and vehicle drivability. | 11-07-2013 |
20130296121 | METHODS AND SYSTEMS FOR ENGINE STOPPING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is stopped to a desired position via slipping a driveline disconnect clutch so that engine starting may be improved. | 11-07-2013 |
20130296122 | METHODS AND SYSTEMS FOR OPERATING A VEHICLE DRIVELINE RESPONSIVE TO EXTERNAL CONDITIONS - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, external data are a basis for operating a driveline disconnect clutch. For example, a vehicle destination may be a basis for opening a driveline disconnect clutch and beginning to discharging an energy storage device so that fewer hydrocarbons may be consumed by the vehicle. | 11-07-2013 |
20130296130 | METHODS AND SYSTEMS FOR TRANSITIONING BETWEEN BRAKING MODES - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a method for transitioning between driveline braking and wheel brakes is provided. | 11-07-2013 |
20130297112 | METHODS AND SYSTEMS FOR A HYBRID VEHICLE - Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance. | 11-07-2013 |
20130297113 | METHODS AND SYSTEMS FOR A HYBRID VEHICLE - Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance. | 11-07-2013 |
20130297114 | METHODS AND SYSTEMS FOR TRANSITIONING BETWEEN DRIVELINE BRAKING MODES - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a method for transitioning between regenerative braking and engine braking is described. | 11-07-2013 |
20130297116 | METHODS AND SYSTEMS FOR OPERATING A VEHICLE DRIVELINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is accelerated to a speed of a driveline integrated starter/generator before the engine is coupled to the driveline integrated starter/generator. | 11-07-2013 |
20130297118 | METHODS AND SYSTEMS FOR LAUNCHING A VEHICLE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is started and idled before engine torque is required so that driveline torque response may be improved. | 11-07-2013 |
20130297119 | METHODS AND SYSTEMS FOR ADJUSTING DRIVELINE OPERATION DURING AN ACCELERATOR TIP-OUT - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine may be operated at an idle speed while a driveline disconnect clutch separating the engine from a driveline is open in response to a reduction in driver demand torque. Engine torque may be applied to the driveline by simply closing the driveline disconnect clutch. | 11-07-2013 |
20130297120 | METHODS AND SYSTEMS FOR PROVIDING UNIFORM DRIVELINE BRAKING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, negative torque of an electric machine is adjusted to mimic negative torque of an engine during engine braking so that the vehicle may transition from regenerative braking to engine braking in a seamless manner. | 11-07-2013 |
20130297121 | METHODS AND SYSTEMS FOR DRIVELINE MODE TRANSITIONS - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a method for transitioning between regenerative braking and providing positive torque to a driveline is presented. | 11-07-2013 |
20130297161 | METHODS AND SYSTEMS FOR HOLDING A VEHICLE STOPPED ON A HILL - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a holding force of a vehicle parked on a hill is adjusted depending on a grade of the hill. | 11-07-2013 |
20130297187 | METHODS AND SYSTEMS FOR ADJUSTING CYLINDER AIR CHARGE - Systems and methods for improving operation of an engine are presented. In one example, a position of a throttle is adjusted along with other actuators to improve engine starting. | 11-07-2013 |
20140026872 | VARIABLE VALVE TIMING FOR EGR CONTROL - Methods and systems are provided for adjusting cylinder valve timings to enable a group of cylinders to operate and combust while another group of cylinders on a second are selectively deactivated. Valve timing may be adjusted to allow flow of air through the inactive cylinders to be reduced, lowering catalyst regeneration requirements upon reactivation. The valve timing may alternatively be adjusted to enable exhaust gas to be recirculated to the active cylinders via the inactive cylinders, providing cooled EGR benefits. | 01-30-2014 |
20140032083 | VARIABLE VALVE TIMING FOR CYLINDER DEACTIVATION - Methods and systems are provided for adjusting cylinder valve timings to enable a group of cylinders to operate and combust while another group of cylinders on a second are selectively deactivated. Valve timing may be adjusted to allow flow of air through the inactive cylinders to be reduced, lowering catalyst regeneration requirements upon reactivation. The valve timing may alternatively be adjusted to enable exhaust gas to be recirculated to the active cylinders via the inactive cylinders, providing cooled EGR benefits. | 01-30-2014 |
20140039778 | NOX CONTROL DURING CYLINDER DEACTIVATION - Methods and systems are provided for improving engine exhaust emissions while enabling exhaust catalyst regeneration following an engine lean event. Prior to a VDE event, or prior to an engine idle-stop, ammonia is produced and stored on an exhaust underbody SCR catalyst. Then, during the engine restart after the VDE mode or the idle-stop, the stored ammonia is used to treat exhaust NOx species while an upstream exhaust underbody three-way catalyst is regenerated. | 02-06-2014 |
20140041362 | METHOD AND SYSTEM FOR REGENERATING A PARTICULATE FILTER - An engine system and method for operating an engine that includes a particulate filter is described. In one example, spark delivery to one or more engine cylinders is ceased while fuel is continued to be injected to the one or more cylinders to improve particulate filter regeneration. The system and method may be particularly beneficial for direct injection turbocharged engines. | 02-13-2014 |
20140067235 | NON-INTRUSIVE EXHAUST GAS SENSOR MONITORING BASED ON FUEL VAPOR PURGE OPERATON - A method of monitoring an exhaust gas sensor coupled in an engine exhaust in an engine is provided. The method includes adjusting engine operation responsive to exhaust gas sensor degradation, the degradation identified during deceleration fuel shut-off (DFSO) and compensated based on whether vapor purge operation is occurring in the engine during DFSO. | 03-06-2014 |
20140100727 | METHOD AND SYSTEM FOR OPERATING A HYBRID POWERTRAIN - A method and a system for improving operation of a hybrid vehicle are presented. In one example, operation of a hybrid driveline is adjusted in response to driving conditions that may cause wheel slip or a stuck vehicle. The approach may reduce driveline wear and improve vehicle drivability. | 04-10-2014 |
20140106927 | METHOD AND SYSTEM FOR IMPROVING VEHICLE LAUNCH - A method and a system for improving operation of a hybrid vehicle are presented. In one example, a clutch is operated while a vehicle is stopped and while a vehicle brake is applied to determine a clutch torque transfer function. The approach may improve vehicle launch after an engine stop. | 04-17-2014 |
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 |
20140162838 | METHOD AND SYSTEM FOR ADJUSTING HYBRID VEHICLE DRIVELINE TORQUE - Methods and systems for improving operation of a hybrid vehicle are presented. In one example, an engine torque estimate may be adapted in response to a torque converter impeller speed error. The methods and systems may reduce the possibility of driveline torque disturbances. | 06-12-2014 |
20140163787 | METHOD AND SYSTEM FOR ADAPTING OPERATION OF A HYBRID VEHICLE TRANSMISSION TORQUE CONVERTER LOCKUP CLUTCH - A method and a system for improving operation of a hybrid vehicle are presented. In one example, operation of a transmission torque converter lockup clutch is adjusted to improve engine starting control. The approach may improve engine starting and vehicle drivability. | 06-12-2014 |
20140238368 | EXHAUST GAS SENSOR DIAGNOSIS AND CONTROLS ADAPTATION - Methods and systems are provided for adjusting an anticipatory controller of an exhaust gas sensor coupled in an engine exhaust. In one embodiment, the method comprises adjusting fuel injection responsive to exhaust oxygen feedback from the anticipatory controller of the exhaust gas sensor and adjusting one or more parameters of the anticipatory controller responsive to a type of oxygen sensor degradation. In this way, the anticipatory controller may be adapted based on the type and magnitude of the degradation behavior to increase performance of the air-fuel control system. | 08-28-2014 |
20140318508 | METHODS AND SYSTEMS FOR TURBOCHARGER CONTROL - Methods are provided for controlling a turbocharged engine having an additional throttle located between an intake manifold of the engine and an outlet of a compressor. In one example approach a method comprises, during a cold start condition, diverting a portion of compressed air from downstream a compressor to a heat exchanger, and heating vehicle components with the heat exchanger. | 10-30-2014 |
20150051762 | METHODS AND SYSTEMS FOR TORQUE CONTROL - Methods and systems are provided for improving surge control. When surge conditions are approached, a reference governor reduces engine airflow at a slower rate and to a higher level than the engine airflow required to meet the reduced torque demand. The excess torque resulting from the extra airflow is offset by applying a negative torque on the driveshaft via an electric machine coupled to the engine or via alternate engine actuator adjustments. | 02-19-2015 |
Patent application number | Description | Published |
20140123631 | METHODS AND SYSTEMS FOR VARIABLE DISPLACEMENT ENGINE CONTROL - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection. | 05-08-2014 |
20140200794 | METHODS AND SYSTEMS FOR A HYBRID VEHICLE - Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance. | 07-17-2014 |
20140222273 | METHODS AND SYSTEMS FOR A HYBRID VEHICLE - Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance. | 08-07-2014 |
20140323266 | METHODS AND SYSTEMS FOR ADJUSTING DRIVELINE OPERATION DURING AN ACCELERATOR TIP-OUT - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine may be operated at an idle speed while a driveline disconnect clutch separating the engine from a driveline is open in response to a reduction in driver demand torque. Engine torque may be applied to the driveline by simply closing the driveline disconnect clutch. | 10-30-2014 |
20140323267 | METHODS AND SYSTEMS FOR DRIVELINE SAILING MODE ENTRY - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, entry conditions for entering a driveline sailing mode are described. Driveline sailing mode may improve driveline torque response and vehicle drivability. | 10-30-2014 |
20150072832 | METHODS AND SYSTEMS FOR OPERATING A VEHICLE DRIVELINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is accelerated to a speed of a driveline integrated starter/generator before the engine is coupled to the driveline integrated starter/generator. | 03-12-2015 |
20150073644 | METHODS AND SYSTEMS FOR PROVIDING UNIFORM DRIVELINE BRAKING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, negative torque of an electric machine is adjusted to mimic negative torque of an engine during engine braking so that the vehicle may transition from regenerative braking to engine braking in a seamless manner. | 03-12-2015 |
20150096296 | METHODS AND SYSTEMS FOR DETECTING COMPRESSOR RECIRCULATION VALVE FAULTS - Methods are provided for identifying degradation in components of a compressor recirculation valve (CRV). One method may include inferring degradation of the CRV based on adaptation of a compressor surge line outside an expected range. | 04-09-2015 |
20150096534 | METHODS AND SYSTEMS FOR VARIABLE DISPLACEMENT ENGINE CONTROL - Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection. | 04-09-2015 |
20150101582 | NON-INTRUSIVE EXHAUST GAS SENSOR MONITORING - A method for monitoring an exhaust gas sensor coupled in an engine exhaust is provided. In one embodiment, the method comprises indicating exhaust gas sensor degradation based on a time delay and line length of each sample of a set of exhaust gas sensor responses collected during a commanded change in air-fuel ratio. In this way, the exhaust gas sensor may be monitored utilizing robust parameters in a non-intrusive manner. | 04-16-2015 |
20150105216 | METHODS AND SYSTEMS FOR LAUNCHING A VEHICLE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is started and idled before engine torque is required so that driveline torque response may be improved. | 04-16-2015 |
20150126328 | METHODS AND SYSTEMS FOR TRANSITIONING BETWEEN BRAKING MODES - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a method for transitioning between driveline braking and wheel brakes is provided. | 05-07-2015 |
20150128917 | METHOD AND SYSTEM FOR IMPROVED DILUTION TOLERANCE - Methods and systems are provided for expediting purging of LP-EGR from an air intake system during conditions of decreasing engine load. During a tip-out, an EGR valve is closed while the engine is shifted to a VDE mode of operation to improve engine tolerance to EGR at lower engine loads and until the EGR is sufficiently purged. A non-VDE mode is resumed if higher engine loads are restored, else, a deceleration fuel shut-off mode is selected if the tip-out continues to zero load. | 05-14-2015 |
20150133264 | METHODS AND SYSTEMS FOR TRANSITIONING BETWEEN DRIVELINE BRAKING MODES - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a method for transitioning between regenerative braking and engine braking is described. | 05-14-2015 |
20150141197 | METHODS AND SYSTEMS FOR DRIVELINE MODE TRANSITIONS - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a method for transitioning between regenerative braking and providing positive torque to a driveline is presented. | 05-21-2015 |
20150210270 | METHODS AND SYSTEMS FOR A VEHICLE DRIVELINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline operating modes may be manually selected to improve hybrid driveline operation during off road conditions. The approaches may improve vehicle drivability and reduce driveline degradation. | 07-30-2015 |
20150217751 | SYSTEMS AND METHODS FOR IMPROVING ENGINE STARTING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is rotated to increase pressure within a fuel rail. The engine is rotated without combusting air and fuel within the engine. | 08-06-2015 |
20150219033 | NON-INTRUSIVE EXHAUST GAS SENSOR MONITORING - A method for monitoring an exhaust gas sensor coupled in an engine exhaust is provided. In one embodiment, the method comprises indicating exhaust gas sensor degradation based on shape of a distribution of extreme values of a plurality of sets of lambda differentials collected during selected operating conditions. In this way, the exhaust gas sensor may be monitored in a non-intrusive manner. | 08-06-2015 |
20150251651 | METHODS AND SYSTEMS FOR CONDITIONALLY ENTERING A DRIVELINE SAILING MODE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a driveline may selectively enter a sailing mode to provide quick driveline torque response with reduced impact on fuel economy. | 09-10-2015 |
20150251653 | METHODS AND SYSTEMS FOR EXTENDING REGENERATIVE BRAKING - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an electrical load may be automatically activated to consume electrical energy produced during driveline braking so that driveline braking may be extended. The electrical load may be a windscreen heater or other device. | 09-10-2015 |
20150274146 | CLUTCH STROKE ADAPTATION ON ENGINE SHUTDOWN - A method according to an exemplary aspect of the present disclosure includes, among other things, controlling a transmission system of a vehicle by positioning a disconnect clutch at its stroke point in response to a commanded engine shutdown. | 10-01-2015 |
20160032854 | NON-INTRUSIVE EXHAUST GAS SENSOR MONITORING BASED ON FUEL VAPOR PURGE OPERATION - A method of monitoring an exhaust gas sensor coupled in an engine exhaust in an engine is provided. The method includes adjusting engine operation responsive to exhaust gas sensor degradation, the degradation identified during deceleration fuel shut-off (DFSO) and compensated based on whether vapor purge operation is occurring in the engine during DFSO. | 02-04-2016 |
20160069318 | METHODS AND SYSTEM FOR IMPROVING HYBRID TRANSMISSION GEAR SHIFTING - Systems and methods for improving transmission gear shifting of a hybrid vehicle are presented. The systems and methods may allow transmission input shaft torque to be lowered to levels where driveline torque disturbances may be reduced even though the driveline has a larger inertia. In one example, driveline torque may be reduced via retarding spark timing. | 03-10-2016 |
20160115879 | METHOD AND SYSTEM FOR AIR FUEL RATIO CONTROL AND DETECTING CYLINDER IMBALANCE - Air/fuel imbalance monitoring systems and methods for monitoring air/fuel ratio imbalance of an internal combustion engine are disclosed. In one embodiment, adjusting engine operation responsive to cylinder air/fuel imbalance based on a determined total number of instances where sensed peak-to-peak exhaust air-fuel ratios differentials are less than a threshold normalized to a total number of peak-to-peak oscillations. The approach can be used to indicate air/fuel ratio imbalances between engine cylinders. | 04-28-2016 |