Patent ID: 8651071
Filing Date: 2014-02-18
Classification: F02D

Abstract:
1. A variable compression ratio engine control apparatus comprising: a fuel injection device that injects fuel into an engine for combustion; a variable compression ratio device that varies an engine compression ratio of the engine; a target compression ratio setting section that sets a target compression ratio; an operating state determining section that determines if an operating state exists that meets a prescribed condition for a fuel cut operating state in which a fuel cut operation is to be executed to stop fuel injection by the fuel injection device; and a compression ratio controlling section that controls the engine compression ratio toward the target compression ratio, the target compression ratio setting section setting the target compression ratio based on an engine rotational speed during the fuel cut operating state, the target compression ratio setting section setting the target compression ratio when the operating state determining section determines that the operating state exists for the fuel cut operating state differently than when the operating state determining section determines that the operating state does not exist for the fuel cut operating state, the target compression ratio setting section setting the target compression ratio to a lower value as the engine rotational speed becomes higher during the fuel cut operating state.