Patent ID: 6722325
Filing Date: 2004-04-20
Classification: F01L

Abstract:
A variable valve control apparatus for an engine, comprising:a variable valve event and lift mechanism varying a valve lift amount of an engine valve; a variable valve timing mechanism varying a phase of the engine valve relative to a crankshaft during an opening period of the engine valve; an operating condition detector detecting operating conditions of the engine; and a control unit that receives a detection signal from said operating condition detector, and outputs control signals to said variable valve event and lift mechanism and said variable valve timing mechanism based on said detection signal, wherein said control unit: calculates a target valve lift amount and a target valve overlap amount based on the operating conditions of the engine; calculates a target valve timing based on said target valve lift amount and said target valve overlap amount; outputs a control signal to said variable valve event and lift mechanism based on said target valve lift amount; and outputs a control signal to said variable valve timing mechanism based on said target valve timing.