- 专利标题: Determining a drift in the fuel static flow rate of a piezoelectric injector of a motor vehicle heat engine
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申请号: US17430941申请日: 2020-03-27
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公开(公告)号: US11384705B2公开(公告)日: 2022-07-12
- 发明人: Quentin Dussardier
- 申请人: VITESCO TECHNOLOGIES GMBH
- 申请人地址: DE Hannover
- 专利权人: VITESCO TECHNOLOGIES GMBH
- 当前专利权人: VITESCO TECHNOLOGIES GMBH
- 当前专利权人地址: DE Hannover
- 代理机构: Nixon & Vanderhye
- 优先权: FR1903238 20190328
- 国际申请: PCT/EP2020/058867 WO 20200327
- 国际公布: WO2020/193795 WO 20201001
- 主分类号: F02D41/20
- IPC分类号: F02D41/20 ; F02D41/14 ; F02D41/22 ; F02D41/24
摘要:
The disclosure relates to a method for determining a drift in the static fuel flow rate of a piezoelectric injector of a motor vehicle combustion engine. The method relies on fluid-pressure measurements carried out in the injector supply chamber in order to calculate a measured static flow rate value. This value is compared against a nominal static flow rate in order to determine the existence, if any, and amplitude of the drift in the static flow rate. Furthermore, each pressure measurement is carried out when the valve of the injector is closed and the injector is open. In this way, the measured static flow rate calculation is not influenced by pressure-variation effects not relevant to the measurement.
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