Patent application number | Description | Published |
20090013945 | CONTROL OF TURBOCHARGER IMBALANCE - A method for controlling flow differences in a turbocharged internal combustion engine is presented. In one example, the description includes a method for adjusting valve timing to reduce flow variation between two compressors. | 01-15-2009 |
20090018751 | CONTROLLING CYLINDER MIXTURE AND TURBOCHARGER OPERATION - A method for controlling differences in exhaust gas residual amount for a two cylinder bank engine having at least one turbocharger is presented. In one example, the description includes a method for adjusting valve timing to reduce cylinder exhaust gas residual variation. | 01-15-2009 |
20090281713 | CYLINDER-BY-CYLINDER BALANCING OF COMBUSTION TIMING IN HCCI ENGINES - Various systems and methods are described for controlling fuel injection to a plurality of cylinders. One example method comprises during combustion timing imbalances among a plurality of cylinders carrying out homogeneous charge compression ignition combustion, adjusting a fuel injection amount in a first cylinder to adjust a combustion timing of the first cylinder in a first direction, and correspondingly adjusting a fuel injection amount in a second cylinder in a second direction to maintain average engine torque and reduce the imbalance. | 11-12-2009 |
20100012087 | SPARK TIMING ADJUSTMENT BASED ON VEHICLE ACCELERATION - Systems, methods and a processor are provided for adjusting the spark timing of an internal combustion engine. The systems, methods and processor include adjusting the spark timing of an internal combustion engine configured to power a vehicle toward peak torque timing based on an output of a longitudinal acceleration sensor configured to sense a longitudinal acceleration of the vehicle. | 01-21-2010 |
20100017096 | VEHICLE STABILITY AND SURGE CONTROL - In one example, a method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting dilution in the combustion chamber of the engine to reduce surge in response to the vehicle acceleration. The dilution may be adjusted by adjusting cam timing, for example. | 01-21-2010 |
20100017101 | VEHICLE SURGE AND SPARK TIMING CONTROL - A method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting spark timing in the combustion chamber of the engine in response to a knock indication, and further adjusting spark timing in response to the vehicle acceleration to reduce surge. | 01-21-2010 |
20100313847 | VEHICLE STABILITY AND SURGE CONTROL - In one example, a method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting dilution in the combustion chamber of the engine to reduce surge in response to the vehicle acceleration. The dilution may be adjusted by adjusting cam timing, for example. | 12-16-2010 |
20100318279 | SYSTEM AND METHOD FOR CONTROLLING AN ENGINE DURING TRANSIENT EVENTS - Systems and methods for controlling an internal combustion engine include adjusting fuel delivered to a cylinder during a transient event by an amount indexed by number of combustion events after detecting the transient event. A base fueling parameter may be adjusted by an adaptive correction value indexed by combustion events after the transient event is detected, with the adaptive value determined using air/fuel ratio difference of previous combustion events during similar transient operating conditions associated with the same combustion event index number. Ionization sensor signal characteristics may be used to determine actual air/fuel ratios used to determine the air/fuel ratio difference and corresponding adaptive correction values. The adaptive values may be modified in response to a vehicle refueling event based on an amount of added fuel relative to existing fuel in the vehicle fuel tank. | 12-16-2010 |
20110000448 | CONTROLLING CYLINDER MIXTURE AND TURBOCHARGER OPERATION - A method for controlling differences in exhaust gas residual amount for a two cylinder bank engine having at least one turbocharger is presented. In one example, the description includes a method for adjusting valve timing to reduce cylinder exhaust gas residual variation. | 01-06-2011 |
20110132341 | Delay Compensated Air/Fuel Control of an Internal Combustion Engine of a Vehicle - A fuel control approach that compensates for time delays to increase exhaust gas sensor feedback response speed. | 06-09-2011 |
20110137539 | Multi-Component Transient Fuel Compensation - A method adjusts fuel injection to account for fuel puddling in the engine intake. The fuel is adjusted based on the ethanol content of the fuel in the puddle, and the make-up of the various fuel components in the puddle. In this way, it is possible to better account for the effects of these parameters on puddle evaporation. | 06-09-2011 |
20110225967 | TURBOCHARGER CONTROL - Various systems and methods for controlling a turbocharger of an engine via a wastegate are described. In one example, the wastegate is adjusted according to a difference between the boost pressure and the atmospheric pressure. In this manner, the interdependency between controlling the boost pressure and using the boost pressure to actuate the wastegate in a boost-based wastegate configuration may be reduced. | 09-22-2011 |
20110253117 | Multi-Component Transient Fuel Compensation - A method adjusts fuel injection to account for fuel puddling in the engine intake. The fuel is adjusted based on the ethanol content of the fuel in the puddle, and the make-up of the various fuel components in the puddle. In this way, it is possible to better account for the effects of these parameters on puddle evaporation. | 10-20-2011 |
20110270510 | CONTROLLING CYLINDER MIXTURE AND TURBOCHARGER OPERATION - A method for controlling differences in exhaust gas residual amount for a two cylinder bank engine having at least one turbocharger is presented. In one example, the description includes a method for adjusting valve timing to reduce cylinder exhaust gas residual variation. | 11-03-2011 |
20110283699 | EXHAUST GAS RECIRCULATION (EGR) SYSTEM - Various systems and methods are described for an exhaust gas recirculation (EGR) system coupled to an engine in a vehicle. One example method comprises, calculating an EGR mass flow from a difference between measurements of clean air mass flow and total mass flow, and correcting for a transient mass flow error. | 11-24-2011 |
20120037134 | METHOD AND SYSTEM FOR EXHAUST GAS RECIRCULATION CONTROL - Methods and systems are provided for adjusting an EGR valve and one or more intake throttles responsive to the output of an intake oxygen sensor to provide a desired amount of EGR flow while maintaining engine torque. The adjustments are coordinated to improve distributed control of the EGR valves and intake throttles, and enable EGR flow even when one actuator is limited. | 02-16-2012 |
20120078488 | SPARK TIMING ADJUSTMENT BASED ON VEHICLE ACCELERATION - Systems, methods and a processor are provided for adjusting the spark timing of an internal combustion engine. The systems, methods and processor include adjusting the spark timing of an internal combustion engine configured to power a vehicle toward peak torque timing based on an output of a longitudinal acceleration sensor configured to sense a longitudinal acceleration of the vehicle. | 03-29-2012 |
20120143476 | METHOD AND SYSTEM FOR COMPENSATING ENGINE THERMAL CONDITIONS - A method for compensating for thermal transient conditions of an engine that can cause valve growth or contraction is disclosed. In one example, the method provides cylinder air amount compensation during non-blow-through and blow-through conditions. The approach may improve cylinder air amount estimates, thereby improving engine emissions. | 06-07-2012 |
20120226432 | CONTROLLING CYLINDER MIXTURE AND TURBOCHARGER OPERATION - A method for controlling differences in exhaust gas residual amount for a two cylinder bank engine having at least one turbocharger is presented. In one example, the description includes a method for adjusting valve timing to reduce cylinder exhaust gas residual variation. | 09-06-2012 |
20120303235 | VEHICLE SURGE AND SPARK TIMING CONTROL - A method is described for operating an engine of a vehicle, the engine having a combustion chamber. The method may include controlling a stability of the vehicle in response to a vehicle acceleration; and adjusting spark timing in the combustion chamber of the engine in response to a knock indication, and further adjusting spark timing in response to the vehicle acceleration to reduce surge. | 11-29-2012 |
20130111900 | METHOD FOR DETERMINING AND COMPENSATING ENGINE BLOW-THROUGH AIR - A method for determining cylinder blow-through air via engine volumetric efficiency is disclosed. In one example, the method provides a way to adjust cylinder blow-through to promote and control a reaction in an exhaust after treatment device. The approach may simplify cylinder blow-through calculations and improve engine emissions via providing improved control of constituents reaching an exhaust after treatment device. | 05-09-2013 |
20130152584 | METHOD FOR REDUCING SENSITIVITY FOR ENGINE SCAVENGING - A method for correcting a total cylinder air flow during scavenging by way of an oxygen sensor is disclosed. Additionally, cylinder trapped air amount and cylinder scavenging air amount are adjusted based on the corrected total cylinder air flow. The approach may reduce sensitivity between cylinder air flow estimates and fuel supplied for combustion. | 06-20-2013 |
20130231846 | POST CATALYST DYNAMIC SCHEDULING AND CONTROL - A method is provided for controlling an engine exhaust with an upstream sensor and a downstream sensor. The method comprises adjusting a set-point for the downstream sensor based on a rate of change of air mass flow upstream of the engine and adjusting fuel injection to control exhaust fuel-air ratio (FAR) at the downstream sensor to the adjusted set-point, and to control exhaust FAR at the upstream sensor to an upstream sensor set-point. | 09-05-2013 |
20130261935 | FUEL COMPONENT IDENTIFICATION - A method adjusts fuel injection based on a fuel make-up, such as a fuel ethanol content. The fuel make-up may be learned during transient conditions by correlating transient fueling effects caused by the different evaporation rates of higher and lower ethanol content to measured exhaust air-fuel ratio. In this way, an ethanol content independent of combustion stoichiometry can be obtained, even during transients, that is less sensitive to part variation and sensor drift. | 10-03-2013 |
20140238369 | HUMIDITY SENSOR DIAGNOSTICS - Embodiments for testing a humidity sensor are provided. One example method comprises indicating degradation of a humidity sensor based on a humidity sensor output and output from an intake gas composition sensor. In this way, output from the intake gas composition sensor may be used to determine if the humidity sensor is degraded. | 08-28-2014 |
20140260241 | METHODS AND SYSTEMS FOR BOOST CONTROL - Methods and systems are provided for improving boost response. A continuously variable compressor recirculation valve and a wastegate are adjusted in complementary frequency bands to move compressor operation away from a surge limit and reduce boost delivery errors. An intake throttle is also concurrently adjusted to offset manifold air-flow rate errors resulting from the wastegate or recirculation valve adjustments. | 09-18-2014 |
20140352669 | METHODS AND SYSTEMS FOR PROVIDING TRANSIENT TORQUE RESPONSE - A method and system for providing a suitable engine torque response during a transient condition is presented. In one example, when a desired inlet manifold pressure is greater than a throttle inlet pressure of a first throttle, a second throttle positioned upstream from the first throttle is opened to increase the throttle inlet pressure. The method may provide an appropriate torque response while minimizing impact on fuel economy. | 12-04-2014 |
20150051812 | TWO-STAGE CATALYST REGENERATION - A system and method are described for reducing NOx emissions following deceleration fuel shut off (DFSO). The method comprises: cutting off fuel to the engine during a deceleration event; open loop operating the engine air/fuel ratio rich of stoichiometry for a predetermined time after the deceleration event; feedback controlling the air/fuel ratio on average near a value rich of stoichiometry for a preselected time after said predetermined time; and feedback controlling the air/fuel ratio returning to stoichiometry after the preselected time. | 02-19-2015 |
20150066336 | SYSTEM AND METHOD TO RESTORE CATALYST STORAGE LEVEL AFTER ENGINE FEED-GAS FUEL DISTURBANCE - Various approaches are described for air-fuel ratio control in an engine. In one example, a method include adjusting fuel injection from an anticipatory controller responsive to exhaust oxygen feedback of an exhaust gas sensor positioned upstream of an exhaust catalyst, the anticipatory controller including a first integral term and a second integral term, the second integral term correcting for past fuel disturbances. In this way, it is possible to provide fast responses to errors via the anticipatory controller, while corrected known past fueling errors, on average, via the second integral term. | 03-05-2015 |