| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection device 1 and a fuel injection method capable of increasing injection pressure without adopting a complicated structure. <P>SOLUTION: The fuel injection device 1 is provided with a fuel injection valve 2 injecting and supplying fuel accumulated in a common rail 4 to an engine, and a fuel shut off valve 3 built in a high pressure supply flow passage A for leading fuel to an injection hole form the common rail 4 and closing the high pressure supply flow passage A and opening the high pressure supply flow passage A if needed. Consequently, pressure pulsation can be generated by temporarily opening the fuel shut off valve 3 and temporarily introducing fuel to the high pressure supply passage A in a downstream side of the fuel shut off valve 3. Fuel pressure can be increased in the high pressure supply flow passage A by this pressure pulsation. Consequently, injection pressure can be increased by a simple structure having a fuel shut off valve 3 built in the high pressure supply flow passage A. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
