Patent ID: 8256217
Filing Date: 2012-09-04
Classification: F02D

Abstract:
1. A control apparatus, comprising: an acceleration request determining unit that determines whether a request for acceleration is made using, as determination factors, an upstream pressure and a downstream pressure of a throttle valve disposed in an intake system of a supercharged internal combustion engine in which intake air is supercharged; a variable valve actuating mechanism control unit that controls a variable valve actuating mechanism that changes valve characteristics of at least one of an intake valve and an exhaust valve of the supercharged internal combustion engine; and an air fuel ratio determining unit that determines an air fuel ratio of exhaust gas downstream of a catalyst disposed in an exhaust system of the supercharged internal combustion engine, wherein when the acceleration request determining unit determines that the request for acceleration is made, the variable valve actuating mechanism control unit controls the variable valve actuating mechanism to change the valve characteristics of at least one of the intake valve and the exhaust valve to the valve characteristics with which output performance of the supercharged internal combustion engine is improved, and when the air fuel ratio determining unit determines that the air fuel ratio is lean, the variable valve actuating mechanism control unit controls the variable valve actuating mechanism to stop changing the valve characteristics.