发明授权
- 专利标题: Fuel injection valve drive circuit
- 专利标题(中): 燃油喷射阀驱动电路
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申请号: US420885申请日: 1982-09-21
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公开(公告)号: US4452210A公开(公告)日: 1984-06-05
- 发明人: Takao Sasayama , Kazuo Kato
- 申请人: Takao Sasayama , Kazuo Kato
- 申请人地址: JPX Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX56-147852 19810921
- 主分类号: H01F7/18
- IPC分类号: H01F7/18 ; F02D41/20 ; F16K31/06 ; F02B3/00
摘要:
Disclosed is a fuel injection valve drive circuit for use in an internal combustion engine wherein the excitation current supplied to the fuel injection valve winding is controlled on a feedback basis so as to maintain the specified value during the period of the valve opening command signal. A control signal based on the difference between the signal representing the excitation current and the reference signal is produced, and the excitation current is controlled by the pulse width modulation signal which is produced based on the magnitude of the control signal.
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