CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE HAVING VARIABLE VALVE SYSTEM

摘要

PROBLEM TO BE SOLVED: To easily supply secondary air to exhaust gas of a rich air-fuel ratio to activate a catalyst device in early stage without requiring piping or the like deteriorating mountability on a vehicle in a control device of an internal combustion engine having a variable system. SOLUTION: The control device allows a suction valve to open with a variable valve system for the suction valve when the pressure in a cylinder is below atmosphere pressure during lowering of a piston immediately after combustion in the cylinder. COPYRIGHT: (C)2004,JPO