Patent ID: 6325029
Filing Date: 2001-12-04
Classification: F01L,F02D,Y02T

Abstract:
A valve timing control system for an internal combustion engine, comprising:first and second valve means arranged for opening/closing an intake pipe leading to a combustion chamber of an internal combustion engine and/or an exhaust pipe extending from said combustion chamber;first valve timing control means designed for causing a valve timing to change so that an actually advanced position of at least either one of said first and second valve means coincides with a target advance position by regulating a control value; andsecond valve timing control means designed for causing a valve timing to change so that an actually advanced position of the other one of said first and second valve means coincides with a target advance position by regulating a control value;wherein the control value for said first valve timing control means is changed in dependence on a controlling state of said second valve timing control means for thereby improving responsivity of said valve timing control system upon actuation of said first and second valve timing control means, respectively.