Patent ID: 7063068

Claim:
A variable valve timing controller for controlling operation of an intake-valve and an exhaust-valve equipped with an engine, comprising: a valve-over-lap setting controller for setting an operation mode for lift timing of said intake-valve and exhaust-valve; and a variable valve timing mechanism controller for operating said intake-valve and said exhaust-valve individually according to the operation mode set by said valve-over-lap setting controller, wherein said valve-over-lap setting controller sets the operation mode to a first mode when the engine is just started, and if a first predetermined condition is met after the first mode is set then said valve-over-lap setting controller resets the operation mode from the first mode to a second mode, wherein, said valve-over-lap setting controller sets the first mode, which instructs said variable valve timing mechanism controller so that at least one-half of a period, from the closing time of said exhaust-valve to the opening time of said intake-valve, is set during an exhaust stroke of the engine.