Patent ID: 8812221
Filing Date: 2014-08-19
Classification: F02D,F02N

Abstract:
1. A stop control system for an internal combustion engine, which controls a stop position of a piston of the engine to a predetermined position during stoppage of the engine by controlling an intake air amount, comprising: an intake air amount-adjusting valve for adjusting the intake air amount; rotational speed-detecting means for detecting a rotational speed of the engine; first intake air amount control means for closing said intake air amount-adjusting valve when a command for stopping the engine is issued, and thereafter executing first intake air amount control in which said intake air amount-adjusting valve is controlled to a first predetermined opening degree larger than an opening degree of said intake air amount-adjusting valve when said intake air amount-adjusting valve is closed, when the detected rotational speed of the engine becomes equal to a first predetermined rotational speed; second intake air amount control means for executing second intake air amount control in which said intake air amount-adjusting valve is controlled to a second predetermined opening degree larger than the first predetermined opening degree in order to stop the piston at the predetermined position, when the rotational speed of the engine becomes equal to a second predetermined rotational speed lower than the first predetermined rotational speed after the first intake air amount control; second predetermined rotational speed-setting means for setting the second predetermined rotational speed according to a magnitude of friction of the piston; and first predetermined rotational speed-setting means for setting the first predetermined rotational speed such that the first predetermined rotational speed is higher as the set second predetermined rotational speed is higher.