Patent ID: 6990939
Filing Date: 2006-01-31
Classification: F01L,F02D,F02M,Y02T

Abstract:
1. A valve timing control system for an internal combustion engine including an EGR device for recirculating exhaust gases to an intake system thereof from an exhaust system thereof, the valve timing control system controlling valve timing by changing a cam phase which is a phase of at least one of an intake cam and an exhaust cam, relative to a crankshaft of the engine, the valve timing control system comprising: operating condition-detecting means for detecting operating conditions of the engine; determination means for determining whether the EGR device is in operation or not; target cam phase-setting means for setting a target cam phase in dependence on the detected operating conditions of the engine and a result of determination of whether the EGR device is in operation or not; and control means for providing control such that the cam phase becomes equal to the target cam phase set by said target cam phase-setting means.