| 摘要 |
PURPOSE:To enable to prevent occurrence of an accident such as overrun of an engine, by operating a valve mechanism for controlling operation of a fuel metering actuator or a driving system for feeding fuel under pressure under the trouble mode in case that some trouble is caused at a portion of an injection means in its fuel increasing state. CONSTITUTION:When a solenoid valve 12 is closed and a solenoid valve 13 is opened in response to the output signal of a control means 30, a piston 9 and a plunger 8 are depressed for injection of fuel. Here, the quantity of injected fuel is controlled on the basis of the valve opening time of the third solenoid valve 13 of a fuel metering actuator. With such an arrangement, if the valve 13 becomes inoperable in its valve opened state, the valve opening timing of the solenoid valve 12 is delayed from the normal timing and current supply to the solenoid valve 13 is stopped. From the next cycle timing on, the valve 12 is opened retroactively according to the timing in advance of the above delay time from the normal valve opening time of the valve 13. Thus, fuel can be supplied although the fuel metering accuracy is not so good, and overrun of the engine due to the above trouble can be prevented without stopping operation of the engine. |
