发明授权
US06978770B2 Piezoelectric fuel injection system with rate shape control and method of controlling same
失效
具有速率形状控制的压电燃料喷射系统及其控制方法
- 专利标题: Piezoelectric fuel injection system with rate shape control and method of controlling same
- 专利标题(中): 具有速率形状控制的压电燃料喷射系统及其控制方法
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申请号: US10843357申请日: 2004-05-12
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公开(公告)号: US06978770B2公开(公告)日: 2005-12-27
- 发明人: Peter Rauznitz , Lester L. Peters , John D. Crofts , William D. Meyer
- 申请人: Peter Rauznitz , Lester L. Peters , John D. Crofts , William D. Meyer
- 申请人地址: US IN Columbus
- 专利权人: Cummins Inc.
- 当前专利权人: Cummins Inc.
- 当前专利权人地址: US IN Columbus
- 代理机构: Nixon Peabody LLP
- 代理商 Tim L. Brackett, Jr.; J. Bruce Schelkopf
- 主分类号: F02D41/20
- IPC分类号: F02D41/20 ; F02M37/04 ; F02M47/02 ; F02M59/46 ; F02M61/16 ; F02M63/00
摘要:
A piezoelectric fuel injection system and a method of controlling same are provided which include a piezoelectric fuel injector having a piezoelectric element, a power source adapted to provide power to the piezoelectric element to actuate the piezoelectric fuel injector, and a controller adapted to charge the piezoelectric element to an initial voltage to begin said injection event, to decrease the voltage from the initial voltage to an intermediate voltage, and to increase the voltage from the intermediate voltage to a primary voltage to thereby control the injection rate shape. The initial voltage level is at least approximately equal to said primary voltage level and preferably approximately equal to a maximum voltage rating. The initial voltage duration, the intermediate voltage duration and the magnitude of the intermediate voltage can be changed or varied to modify the injection or rate shape.