General Description

GENERAL DESCRIPTION
4G63 engine used in LANCER EVOLUTION IX adopts MITSUBISHI INNOVATIVE VALVE TIMING ELECTRONIC CONTROL SYSTEM (MIVEC).

MIVEC mechanism is as follows:

V.V.T. (VARIABLE VALVE TIMING) CONTROL SYSTEM





This V.V.T. system consists of the parts indicated in the illustration.

V.V.T. (VARIABLE VALVE TIMING) SPROCKET





This V.V.T. sprocket is installed to change the valve timing through the vane rotor driven by oil pressure from the oil feeder control valve.

CAMSHAFT





The camshaft has the oil passage to transfer the oil pressure from the oil feeder control valve to the V.V.T. sprocket.

OIL FEEDER CONTROL VALVE (OCV)





This oil feeder control valve uses an electromagnetic valve which switches oil pressure affecting a vane rotor on a V.V.T. sprocket ASSY. This is driven by the signal from the engine ECU.