| Patent application number | Description | Published |
|---|
| 20080295513 | Adaptive Learning System and Method of Vane Position for a Variable Geometry Turbocharger - A method of operation for an engine system having a variable geometry turbocharger with a vane, the vane having a variable position is provided. The method includes adjusting a vane of the variable geometry turbocharger through a range of operation by stepping through a plurality of vane positions and holding at each of the plurality of positions, the range spanning from a substantially minimum position to a substantially maximum position of the variable geometry turbocharger, and adjusting operation of the engine based on a response to the vane adjustment. | 12-04-2008 |
| 20090048728 | Water-in-Fuel Detection Using Duty Cycle Calculation - A method for operating a vehicle having a fuel system that may be contaminated with water is described. The method includes, adjusting an operating parameter in response to a relative amount of high and low readings from a water-in-fuel sensor coupled in the fuel system. | 02-19-2009 |
| 20100108029 | FUEL SYSTEM DIAGNOSIS VIA FUEL PRESSURE SWITCH - An engine system for a vehicle and its method of operation are provided. In one embodiment, the engine system includes an internal combustion engine; a fuel passage for supplying fuel to the internal combustion engine; a fuel pump arranged along the fuel passage; a fuel filter downstream of the fuel pump; a fuel pressure switch arranged along the fuel passage downstream of the fuel filter, the fuel pressure switch configured to switch to a high pressure state in response to a higher fuel pressure within the fuel passage downstream of the fuel filter and switch to a low pressure state in response to a lower fuel pressure within the fuel passage downstream of the fuel filter; and a control system configured to indicate a clogging of the fuel filter based on a period of time that the fuel pressure switch remains in the low pressure state. | 05-06-2010 |
| 20100122861 | OIL CONTROL VALVE DEGRADATION DETECTION AND CLEANING STRATEGY - A method for operating an oil control valve coupled to a cam phaser configured to adjust a position of at least one cam between hard stops, the oil control valve included in an internal combustion engine having an intake valve and/or an exhaust valve controlled via the cam phaser. The method including operating the oil control valve responsive to cam position feedback information, the oil control valve adjusted in a first relationship based on the feedback information and operating the oil control valve in a cleaning mode during select combustion conditions by abruptly switching the oil control valve between two states responsive to the cam position feedback information. The oil control valve adjusted in a second relationship based on the feedback information, the second relationship including more abrupt adjustment than the first relationship. | 05-20-2010 |
| 20100175462 | VARIABLE DISPLACEMENT ENGINE DIAGNOSTICS - Methods and systems are provided for monitoring cylinder valve deactivation in an engine operating with a plurality of cylinder valves. One example method comprises indicating valve degradation based on an indication of manifold pressure over a plurality of immediately successive induction events of the engine, said indication responsive to increases and decreases in the indication of manifold pressure correlated to the induction events of engine cylinders and further correlated to whether cylinders are commanded to be activated or deactivated. | 07-15-2010 |
| 20100175463 | VARIABLE DISPLACEMENT ENGINE DIAGNOSTICS - Methods and systems are provided for monitoring cylinder valve deactivation of a cylinder valve of an engine. One example method comprises, indicating degradation of cylinder valve deactivation in response to manifold pressure at or around a characteristic frequency. | 07-15-2010 |
| 20100211297 | COORDINATION OF VARIABLE CAM TIMING AND VARIABLE DISPLACEMENT ENGINE SYSTEMS - Systems and methods are provided for operating an internal combustion engine including a variable cam timing (VCT) mechanism in cooperation with a plurality of deactivatable cylinders, each cylinder with a plurality of cylinder valves. One example method comprises, operating at a first cylinder valve timing before a transition of reactivating deactivated cylinders, and, before the transition, advancing cylinder valve timing from the first valve timing, where after the transition the cylinder valve timing remains at a second valve timing, the second valve timing advanced relative to the first valve timing. | 08-19-2010 |
| 20100280739 | COORDINATION OF VARIABLE CAM TIMING AND VARIABLE DISPLACEMENT ENGINE SYSTEMS - A method of controlling an engine with a first group of cylinders having selectively deactivatable cylinders valves and a variable camshaft timing actuator coupled in a hydraulic system is described. In one example, the method includes during a first mode where the first group of cylinders is activated to carry out combustion cycles, adjusting the hydraulic system with a first gain based on cam timing feedback information and/or maintaining a null position of the actuator by adjusting a control signal to the hydraulic system to within a first value range. During a second mode where the first group of cylinders is deactivated, the method includes adjusting the hydraulic system with a second gain based on cam timing feedback information, the second gain higher than the first gain and/or maintaining the null position of the actuator by adjusting the control signal to the hydraulic system to within a second value range. | 11-04-2010 |
| 20110041493 | METHODS AND SYSTEMS FOR TURBOCHARGER CONTROL - Methods are provided for controlling a turbocharged engine having a throttle and a turbocharger. One example method comprises, moving the throttle during boosted conditions, separating out effects on the throttle inlet pressure into a first portion corresponding to disturbances caused by the movement of the throttle, and a second, remaining, portion. The method further comprises adjusting the turbocharger based on the second portion and not the first portion. | 02-24-2011 |
| 20110045948 | METHODS AND SYSTEMS FOR TURBOCHARGER CONTROL - Methods and systems are provided for controlling a vehicle engine, the engine including a turbocharger and a transmission. One example method comprises, operating the transmission at a first lower gear with a first boost level, increasing the boost from the first boost level before completing a shift from the first lower gear to a second higher gear, and after completing the shift, operating the transmission at the second higher gear with the increased boost. | 02-24-2011 |
| 20110066357 | INFERRED OIL RESPONSIVENESS USING PRESSURE SENSOR PULSES - A system and method for controlling an internal combustion engine include determining oil responsiveness based on pressure variations associated with oil pump pulses in response to a stimulus, and controlling the engine based on the determined oil responsiveness. The stimulus may be a change in oil temperature, engine speed, or commanded pump pressure, for example. The system and method may also use the rate of change of mean oil pressure to determine the oil responsiveness or measure of oil viscosity. Oil responsiveness may be used to control hydraulic actuators, such as variable cam timing devices, or valve deactivation devices. | 03-17-2011 |
| 20110137543 | METHOD FOR STARTING AN ENGINE - A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one embodiment, the method controls a transition from split fuel injection timing during an engine start to single event fuel injection during idle speed or engine torque control modes. The method better manages vehicle launch performance when the engine is restarted while coupled to an automatic transmission that is in gear. | 06-09-2011 |
| 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 |
| 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 |
| 20110144882 | APPROACH FOR VARIABLE PRESSURE OIL INJECTION - Varying oil injection by an oil injector onto a piston of an engine to accommodate different operating conditions. | 06-16-2011 |
| 20110144883 | Engine Control with Valve Operation Monitoring Using Camshaft Position Sensing - A system or method for controlling a multiple cylinder internal combustion engine operable in a reduced displacement mode with at least one valve or cylinder selectively deactivated include monitoring valve operation by analyzing camshaft position to detect valve operation inconsistent with a current cylinder state (activated or deactivated) and controlling the engine in response to detecting the inconsistent operation. The camshaft position may be used to produce a surrogate signal indicative of intake/exhaust valve lift generated using camshaft sensor tooth deviation relative to an expected or reference tooth position for a corresponding crankshaft position and compared to a corresponding threshold. The surrogate signal indicative of valve lift may also be generated by pattern matching or correlation of one or more reference tooth position patterns to a measured or inferred tooth position pattern. | 06-16-2011 |
| 20110144888 | ENGINE CONTROL WITH VALVE DEACTIVATION MONITORING USING EXHAUST PRESSURE - A system or method for controlling a multiple cylinder internal combustion engine operable in a reduced displacement mode with at least one valve or cylinder selectively deactivated include controlling the engine in response to detecting opening of an exhaust valve after deactivation based measured or inferred exhaust pressure changes after deactivation. In one embodiment, controlling the engine includes reactivating one or more deactivated cylinders/valves, inhibiting subsequent deactivation, and/or storing a diagnostic code in a computer readable storage medium in response to detecting valve opening after deactivation. | 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 |
| 20110162620 | METHOD AND SYSTEM FOR ENGINE CONTROL - Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases. | 07-07-2011 |
