| 摘要 |
PURPOSE:To maintain satisfactory combustion condition for preventing an engine from stall by detecting fuel temperature in a fuel injector to reduce EGR gas when the fuel temperature exceeds a predetermined value in low rotation of the engine. CONSTITUTION:A sensor, 17 for detecting fuel temperature is provided in a fuel injector 16 to supply the detecting signal to the input of a control circuit 18. Also, detecting signals of a load sensor 14 for detecting the load condition of an engine and a rotation sensor 15 for detecting the rotational frequency of the engine are sent to the input of the control circuit 18. When fuel temperature in the fuel injector 16 exceeds a predetermined value, the control circuit 18 instructs a three-way solenoid valve 11 to full open a throttle valve 6 according to the signal of the fuel temperature sensor 17 in low load rotation of the engine, while instructing a load braking solenoid valve 19 to lengthen the valve opening time to reduce the opening of an EGR controlling valve 7. |
