发明授权
- 专利标题: Auxiliary fuel injection control circuit
- 专利标题(中): 辅助燃油喷射控制电路
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申请号: US842998申请日: 1977-10-17
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公开(公告)号: US4174682A公开(公告)日: 1979-11-20
- 发明人: Ulrich Drews , Erich Singer
- 申请人: Ulrich Drews , Erich Singer
- 申请人地址: DEX Stuttgart
- 专利权人: Robert Bosch GmbH
- 当前专利权人: Robert Bosch GmbH
- 当前专利权人地址: DEX Stuttgart
- 优先权: DEX2651087 19761109
- 主分类号: F02D41/34
- IPC分类号: F02D41/34 ; F02D41/14 ; F02D41/18 ; F02D3/00 ; F02M7/00
摘要:
An electronic circuit is described for use with an existing fuel injection system in which fuel control pulses are generated on the basis of air flow rate, engine speed and exhaust gas composition. In particular, the existing fuel injection system is assumed to include an exhaust gas sensor with a signal integrator and a throttle position switch which indicates a closed throttle. It is also assumed that the fuel injection system shuts off fuel control pulses when the throttle is closed and engine speed drops below a predetermined value. The present circuit is intended to recognize this fuel shutoff and to set the integrator at an average value irrespective of the "too lean" signal which it receives from the exhaust gas sensor. In this way, upon termination of fuel shutoff, the engine will receive an average mixture rather than a highly enriched one.