| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection control system reducing pressure while inhibiting a rise of fuel temperature when the pressure of high pressure fuel in an accumulator is reduced. <P>SOLUTION: This system includes a cylinder 61 forming a pressure chamber 63 at an inside thereof and a plunger 62 pressurizing fuel in the pressure chamber 63 and feeding the same to the accumulator. A suction port 64 sucking fuel to the pressure chamber 63 from a fuel tank, a delivery port 66 delivering fuel pressurized by the plunger 62 to the accumulator from the pressure chamber 63, and a return flow inlet 69 opened and closed by the reciprocating plunger 62 and making fuel flow into the cylinder 61 from the accumulator are formed on the cylinder 61. The system includes a pressure reduction control means reducing pressure in the accumulator by opening a metering valve 70 provided at the suction port 64 and returning high pressure fuel in the accumulator to the fuel tank through a return flow inlet 69, the pressure chamber 63, and the suction port 64. <P>COPYRIGHT: (C)2010,JPO&INPIT |
