| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a control device for an on-vehicle internal combustion engine, capable of sufficiently obtaining effect on the improvement of fuel economy caused by the automatic stop of an internal combustion engine during driving. SOLUTION: A brake booster 8 for storing negative pressure being produced in an inlet passage 11 of an engine 2 as brake negative pressure and reducing the full pedal depression force of a brake pedal 7, based on the pressure difference between the brake negative pressure, and the atmospheric pressure is mounted on an automobile 1. The engine 2 is stopped automatically, as one of the conditions that the brake negative pressure reach a value necessary for the normal operation of the brake booster 8 (required value REQ2). The required value REQ2 of the brake negative pressure which is used as the condition of automatic stop of the engine 2 is varied, according to the braking state of the automobile 1, so as to become the optimum value for reconciling the normal operation of the brake booster 8 with the improvement of the fuel economy of the engine 2, independently of the braking state of the automobile 1.</p> |
