Patent ID: 7621126
Filing Date: 2009-11-24
Classification: F01L,F02D,Y02T

Abstract:
1. A method for controlling an internal combustion engine, the method comprising: operating said engine in a first mode wherein a cylinder air amount is controlled by adjusting the opening amount of an electrically controlled throttle located upstream of an intake manifold, adjusting the speed of a turbo charger compressor communicating air flow to said engine, and adjusting the timing of at least an intake valve, where the first mode includes non-degraded valve or valve control operation; operating said engine in a second mode wherein said cylinder air amount is controlled by adjusting the opening amount of said electrically controlled throttle, and by controlling the speed of said turbo charger compressor, and operating said at least the intake valve at a fixed timing, where the second mode includes degraded valve control operation; and selecting between said first mode and said second mode in response to the valve control degradation.