发明名称 |
Electronic compensator for a piezoelectric actuator |
摘要 |
A fuel injector comprises a tube assembly, a stem assembly, and a plurality of sets of piezoelectric elements. The tube assembly includes a seat defining an opening through which fuel enters an internal combustion engine. The stem assembly includes a cap and a stem that are relatively movable with respect to one another. A gap is located between the stem and cap when the stem contiguously engages the seat such that fuel flow through the opening is prevented. A first set of piezoelectric elements moves the cap in response to a first electric field, and a second set of piezoelectric elements moves the first set of piezoelectric elements in response to a second electric field. A sensor measuring the gap compensates the second electric field for physical changes in at least one of the tube and stem assemblies.
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申请公布号 |
US6650032(B2) |
申请公布日期 |
2003.11.18 |
申请号 |
US20020159281 |
申请日期 |
2002.06.03 |
申请人 |
SIEMENS AUTOMOTIVE CORPORATION |
发明人 |
SUMRAK THOMAS ALLEN;WIECZOREK DAVID PAUL |
分类号 |
F02D41/20;F02M51/06;F02M61/16;F02M63/00;F02M65/00;H01L41/083;H01L41/09;H02N2/00;H02N2/06;(IPC1-7):H01L41/083;H02N2/02 |
主分类号 |
F02D41/20 |
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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