| 摘要 |
PURPOSE:To make optimum fuel injection commensurate to an operation state come to fruition, by calculating a fuel injection quantity according to a state of engine operation, while controlling a fuel injection device in a way of calculating the fuel injection start timing according to the said fuel injection quantity and fuel injection pressure. CONSTITUTION:In case of an electronic control circuit 17 at engine operation, first of all, whether a throttle valve 8 is situated in an idle position or not as well as whether engine load is less than the specified valve or not are judged on the basis of a signal out of a throttle position sensor 8b and according to this result, fuel injection pressure P is set to Pa. Then, a fundamental fuel injection quantity is found out of a suction air quantity Q by an air flow meter 10 and an engine speed N by a turning angle sensor 15a, and this value is compensated in conformity with every operation condition. Next, this compensated injection quantity is further compensated on the basis of the given injection pressure P as mentioned above, through which the actual injection time is set. And, on the basis of the said fuel injection pressure P, a pressure control valve 14 is controlled, while a fuel injection valve 4 is operated and controlled in this way. |
