Patent ID: 8676478

Claim:
An engine stop control device that performs engine stop control for controlling an engine rotation behavior with torque of an electric machinery such that an engine rotation stop position is controlled to a target stop position when the control device stops engine rotation in response to an engine stop request, the control device comprising: a reference point target rotation speed setting means for setting target rotation speed at a reference point, which is set at a position preceding the target stop position by a first predetermined crank angle; a target trajectory calculating means for calculating a target trajectory of the engine rotation behavior extending since the engine stop control is started until the target rotation speed at the reference point is reached based on the target rotation speed at the reference point and an engine friction; and a stop controlling means for controlling the torque of the electric machinery to conform the engine rotation behavior to the target trajectory during execution of the engine stop control, wherein the stop controlling means controls the torque of the electric machinery such that an energy deviation between the target trajectory and the engine rotation behavior becomes zero at a position preceding the reference point by a second predetermined crank angle; the reference point target rotation speed setting means sets the target rotation speed at the reference point to or under lower limit rotation speed of a rotation speed range, in which the torque of the electric machinery is generated; the stop controlling means controls the torque of the electric machinery such that the engine rotation speed coincides with the lower limit rotation speed of the rotation speed range, in which the torque of the electric machinery is generated, at the position preceding the reference point by the second predetermined crank angle; and the electric machinery is an alternator.