Patent ID: 7441520
Filing Date: 2008-10-28
Classification: F02D,Y02T

Abstract:
1. A valve-timing control apparatus of an internal combustion engine, comprising: a valve timing controller that continuously and variably controls an overlap period of an intake valve and an exhaust valve of an internal combustion engine; driving-state determination means for determining a driving state of the internal combustion engine; overlap-period setting means for setting the overlap period with the valve timing controller, with the overlap-period setting means setting the overlap period during a start of the internal combustion engine based on determinations of the driving-state determination means which vary as the internal combustion engine starts, such that the overlap period increases as a temperature of an engine cooling fluid decreases; and ignition-timing setting means for setting an ignition timing of the internal combustion engine based on the determinations of the driving-state determination means, with the ignition-timing setting means setting the ignition timing during a cold start of the internal combustion engine based on the determinations of the driving-state determination means at the engine startup, such that the ignition timing is advanced as the valve overlap period increases.