CYLINDER DEACTIVATION SWITCHING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE WITH CYLINDER DEACTIVATION SWITCHING MECHANISM

摘要

PROBLEM TO BE SOLVED: To provide a cylinder deactivation switching control device for an internal combustion engine with a cylinder deactivation switching mechanism switching the cylinder deactivation switching mechanism by using engine water temperature without providing a new sensor and securing smooth cylinder deactivation switching by estimating oil pressure at low cost. SOLUTION: The cylinder deactivation switching control device for a multi-cylinder internal combustion engine provided with a cylinder deactivation switching mechanism 20 switching a movable state and a deactivation state of opening and closing of an intake and an exhaust valves of part of cylinders by hydraulic is provided with an engine water temperature detection means 43 detecting temperature of cooling water cooling the internal combustion engine, a deactivation switching permission zone storing means storing the upper limit of engine water temperature permitting cylinder deactivation switching, and a switching permission means permitting switching the movable state and the deactivation state of the intake and the exhaust valves by the cylinder deactivation switching mechanism 20 only when engine water temperature detected by the engine water temperature detection means 43 is in a deactivation switching permission zone below the upper limit stored by the deactivation switching permission zone storing means. COPYRIGHT: (C)2005,JPO&NCIPI