发明名称 |
Hydraulically-actuated fuel injector with direct control needle valve |
摘要 |
A hydraulically actuated fuel injector (14') includes an injector body (105) having an actuation fluid inlet (106) and a needle control chamber (118). A hydraulic means within the injector pressurizes fuel in the injector body (105). The hydraulic means includes an actuation fluid control valve (140) having a solenoid (130) and is moveable to open and close the actuation fluid inlet (106). A needle valve member (160) includes a closing hydraulic surface (167) exposed to pressure in the needle control chamber (118). A needle control valve (136), which utilizes the same solenoid (130), is mounted in the injector body (105) and moveable to open and close the needle control chamber (118) to a source of high pressure fluid (106). The slower response time of the actuation fluid control valve (140) allows for direct control of the fast responding needle valve (160) by a single fast acting two-way solenoid (130). <IMAGE> |
申请公布号 |
EP0826877(A3) |
申请公布日期 |
1998.05.06 |
申请号 |
EP19970306118 |
申请日期 |
1997.08.12 |
申请人 |
CATERPILLAR INC. |
发明人 |
CHEN, SHIKUI K.;HEFLER, GREGORY W. |
分类号 |
F02M47/00;F02M45/04;F02M47/02;F02M51/06;F02M57/02;F02M59/10;F02M59/46;F02M63/00 |
主分类号 |
F02M47/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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