| 摘要 |
PURPOSE:To spread a margin of knocking in an engine when it is at a high temperature, by icreasing a basic injection-quantity corrective coefficient relating to the temperature of intake air if all signals of detection values are generated for a load, cooling water temperature, speed and the temperature of intake air in the engine exceeding each predetermined value. CONSTITUTION:A number of basic fuel injection pulses Tp is calculated by reading an updated intake air temperature THA stored in a RAM46 and obtaining a corrective coefficient F relating to this intake air temperature. Next, an engine is driven at a load higher than the predetermined load, that is, in a throttle value opening ADTH exceeding 70 deg., with a cooling water temperature THW higher than 100 deg.C and at a speed NE exceeding a predetermined value C2, and when the corrective coefficient F is smaller than 0.98, that is, an intake air temperature THA is higher than 30 deg.C, a corrective coefficient F', if it is obtained, relating to the updated intake air temperature THA stored in the RAM46 comes to be in a high value as compared with the coefficient F. And next, if an ignition advance angle theta is obtained from the Tps obtained by calculation and the updated speed NE, the ignition timing is controlled to a delay angle direction as the Tps increases in a high range of the speed NE, causing a margin of knocking to be increased. |
