发明授权
US5738075A Hydraulically-actuated fuel injector with direct control needle valve
失效
具有直接控制针阀的液压致动式燃油喷射器
- 专利标题: Hydraulically-actuated fuel injector with direct control needle valve
- 专利标题(中): 具有直接控制针阀的液压致动式燃油喷射器
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申请号: US864606申请日: 1997-05-28
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公开(公告)号: US5738075A公开(公告)日: 1998-04-14
- 发明人: Shikui K. Chen , Gregory W. Hefler
- 申请人: Shikui K. Chen , Gregory W. Hefler
- 申请人地址: IL Peoria
- 专利权人: Caterpillar Inc.
- 当前专利权人: Caterpillar Inc.
- 当前专利权人地址: IL Peoria
- 主分类号: F02G5/00
- IPC分类号: F02G5/00 ; F02M45/04 ; F02M47/02 ; F02M47/04 ; F02M57/02 ; F02M59/10 ; F02M59/36 ; F02M59/46 ; F02M63/00 ; F02M63/02 ; F02M7/00 ; F02M37/04
摘要:
A hydraulically actuated fuel injector includes an injector body having an actuation fluid inlet and a needle control chamber. A hydraulic means within the injector pressurizes fuel in the injector body. The hydraulic means includes an actuation fluid control valve having a solenoid and is movable to open and close the actuation fluid inlet. A needle valve member includes a closing hydraulic surface exposed to pressure in the needle control chamber. A needle control valve, which utilizes the same solenoid, is mounted in the injector body and movable to open and close the needle control chamber to a source of high pressure fluid. The slower response time of the actuation fluid control valve allows for direct control of the fast responding needle valve by a single fast acting solenoid.
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