Patent ID: 8215285
Filing Date: 2012-07-10
Classification: F01L,F02D,F02N,F02P,Y02T

Abstract:
1. A controller of a variable valve device for controlling a lift operation crank angle varying mechanism that varies an operation angle of an intake valve of an internal combustion engine, which is configured to: before starting the engine, set the lift operation crank angle varying mechanism to control the intake valve to have an operation angle as to retard a valve close timing of the intake valve relative to a piston bottom dead center; define a given period from an instruction time when an instruction signal is fed to the controller for starting the engine to a time when a combustion of air/fuel mixture is actually commenced in the engine; and when, in the given period, a temperature representing the temperature of the engine is lower than a predetermined temperature, reduce the operation angle of the intake valve to bring the valve close timing of the intake valve near to the piston bottom dead center.