Patent ID: 7114484
Filing Date: 2006-10-03
Classification: B60K,B60W,F02B,F02D,F02N,Y02T

Abstract:
1. A control method of a drive apparatus having an internal combustion engine that operates with a high expansion ratio by reducing an effective compression ratio through advancement of an intake valve closing timing, and a torque output device capable of outputting a torque to an output shaft of the internal combustion engine, comprising the steps of: detecting a stop of operation of the internal combustion engine; applying a torque to the output shaft of the internal combustion engine via the torque output device; and controlling driving of the torque output device so that the internal combustion engine stops at a target stop position which is set outside a region that leads to an increased compression ratio in an initial compression stroke when the internal combustion engine is next started; wherein the driving of the torque output device is controlled so that the internal combustion engine stops at a target stop position set outside a region in which an intake gas in a cylinder is expanded after closure of an intake valve until start of compression of the intake gas; wherein the driving of the torque output device is controlled so that the internal combustion engine stops at a target stop position that is a predetermined angle apart from a bottom dead center of the initial compression stroke when the internal combustion engine is next started; wherein the driving of the torque output device is controlled so that the internal combustion engine stops at a target stop position which is set at or near a position of intake valve closure that immediately precedes the initial compression stroke, or which is set at or near a position that is substantially symmetric to the position of intake valve closure with respect to a vertical straight line passing through a bottom dead center; and wherein the driving of the torque output device is controlled so that the internal combustion engine stops, and then moves to the target stop position of the internal combustion engine.