摘要:
A method for determining degraded valve operation. According to the method, valve degradation can be determined from the duration of a spark event. This method allows for the determination of both intake and exhaust valve degradation.
摘要:
A method for determining degraded valve operation. According to the method, valve degradation can be determined from the duration of a spark event. This method allows for the determination of both intake and exhaust valve degradation.
摘要:
A method for determining degraded valve operation. According to the method, valve degradation can be determined from the duration of a spark event. This method allows for the determination of both intake and exhaust valve degradation.
摘要:
A method for determining degraded valve operation. According to the method, valve degradation can be determined from the duration of a spark event. This method allows for the determination of both intake and exhaust valve degradation.
摘要:
Methods and systems are provided for controlling an engine system with a variable cam timing device. In one example, the variable cam timing device is operated to adjust engine valve timing differently at engine stop based on whether the engine stop is in response to an operator request or in response to an automatic controller initiated engine stop without an operator request.
摘要:
Methods and systems for controlling an engine that may be automatically stopped and started are presented. In one example, a method adjusts a position of an air inlet throttle according to engine position and in response to an operator change of mind to restart an engine that is being automatically stopped.
摘要:
Methods and systems for stopping and starting an engine automatically are presented. In one example, a method inhibits automatic engine stopping in response to output of an on-board camera. The method prevents engine stopping during conditions where little fuel may be saved via automatically stopping the engine.
摘要:
Methods and systems are provided for controlling an engine system with a variable cam timing device. In one example, the variable cam timing device is operated to adjust engine valve timing differently at engine stop based on whether the engine stop is in response to an operator request or in response to an automatic controller initiated engine stop without an operator request.
摘要:
Methods and systems for controlling an engine that may be automatically stopped and started are presented. In one example, a method adjusts a position of an air inlet throttle according to engine position and in response to an operator change of mind to restart an engine that is being automatically stopped.
摘要:
A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one example, the method adjusts a desired engine speed to at least two levels during engine speed run-up from cranking to engine idle speed. The method may improve vehicle launch for stop/start vehicles.