发明授权
- 专利标题: Electronic unit injector with pressure assisted needle control
- 专利标题(中): 带压力辅助针控制的电子单元注射器
-
申请号: US10792169申请日: 2004-03-03
-
公开(公告)号: US07455243B2公开(公告)日: 2008-11-25
- 发明人: Dana R. Coldren , Mingchun Dong , Michael R. Huffman
- 申请人: Dana R. Coldren , Mingchun Dong , Michael R. Huffman
- 申请人地址: US IL Peoria
- 专利权人: Caterpillar Inc.
- 当前专利权人: Caterpillar Inc.
- 当前专利权人地址: US IL Peoria
- 代理机构: Liell & McNeil
- 主分类号: F02M47/02
- IPC分类号: F02M47/02 ; F02D1/06
摘要:
An electronically controlled fuel injector includes a reduced part count and complexity over similar fuel injectors without a substantial reduction in performance capabilities. This is accomplished by using a one-piece needle that is hydraulically balanced and biased toward a closed position with a spring positioned in the needle control chamber. Although subtle, this injector has some ability to control the fuel pressure when the needle valve is opening and closing by adjusting a relative timing of a pressure control valve opening relative to a needle control chamber, using separate electrical actuators. The invention is particularly applicable to fuel injectors that cycle through high and low pressure states during and between injection events, respectively. Cam actuated fuel injectors being particularly well suited.
公开/授权文献
信息查询