| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel pressure control device capable of obtaining the constant fuel pressure without being affected by the variance of the power supply voltage or the performance of a pump motor. SOLUTION: A fuel pressure control device is provided with a fuel flow sensor 16 to detect the flow rate of the fuel to be returned to a fuel tank 14 through a pressure regulator 15 to adjust the pressure of the fuel to be fed from a fuel pump 2 to an injector 9. The driving current of a pump motor 1 is PWM controlled so that the output signal of the fuel flow sensor 16 is kept at the target value. |
