Patent ID: 7426913
Filing Date: 2008-09-23
Classification: F01L,F02D,Y02T

Abstract:
1. A system for controlling an intake valve of an internal combustion engine, comprising: a variable valve mechanism having a control shaft to continuously vary a valve lift amount of the intake valve in accordance with a rotational angle of the control shaft and an actuator to drive the control shaft; and a control unit that controls the actuator so as to set the control shaft to a first rotational angle position at which the valve lift amount takes a first value during an engine idling period after the engine has been warmed up, and to a second rotational angle position at which the valve lift amount takes on a second value larger than the first value to provide a required intake air quantity to start the engine at a time from during an engine stop period to completion of a crank period and to a third rotational angle position at which the valve lift amount takes a minimum value smaller than the first value within an engine speed decrease period before the engine stop period.