| 摘要 |
PURPOSE:To reduce the responding time until the regulated fuel pressure is set and to improve the accuracy of fuel injection by providing the first and the second solenoid vales in series at the downstream side of a fuel pressure regulator of a fuel passage, and operating them in the reverse directions each other. CONSTITUTION:The first fuel pressure regulator 3 to regulate the fuel from a fuel pump 1 to a constant pressure P1, the second fuel regulator 4 to control the fuel of the constant pressure P1 to the fuel pressure P2 responding to the pressure of a suction manifold, the third fuel pressure regulator 11 to control the upstream side of a fuel passage 10 connected to the combustion chamber 6 of the regulator 4 at a constant fuel pressure P5, and the fourth fuel pressure regulator 16 are provided. And in this case, the first and the second solenoids 31 and 32 to open and close the jets b and a' are provided, and they are operated reversely each other responding to the engine rotation frequency. As a result, the fuel pressure can be regulated between the both solenoid valves 31 and 32, and the accuracy of fuel injection is improved. |
