| 摘要 |
PURPOSE: A fuel supply pressure control device of an engine is provided to secure optimum fuel supply pressure to be supplied to a combustion chamber by actively controlling the pressure of a fuel rail without depending on a fuel pump. CONSTITUTION: A fuel supply pressure control device of an engine comprises a solenoid actuator(3) installed to a fuel rail(1) to vary the volume of the fuel rail; a fuel pressure sensor(5) installed to the fuel rail; and a controller receiving a signal of the fuel pressure sensor and executing duty control of the solenoid actuator. The solenoid actuator comprises a housing(7) connected to one end of the fuel rail, and a piston(9) rectilinearly reciprocating in the fuel rail in a state protruded from the housing. The controller comprises an ECU(Electronic Control Unit,11) controlling the engine by collecting and calculating various information of the engine.
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