发明授权
- 专利标题： Air/fuel control system with catalytic converter monitoring
- 专利标题（中）： 具有催化转化器监测的空气/燃料控制系统
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申请号： US315737申请日： 1994-09-30
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公开(公告)号： US5497618A公开(公告)日： 1996-03-12
- 发明人: Alan D. Brailsford , Douglas R. Hamburg , Eleftherios M. Logothetis , Mohammed Yussouff
- 申请人： Alan D. Brailsford , Douglas R. Hamburg , Eleftherios M. Logothetis , Mohammed Yussouff
- 申请人地址： MI Dearborn
- 专利权人： Ford Motor Company
- 当前专利权人： Ford Motor Company
- 当前专利权人地址： MI Dearborn
- 主分类号： F01N11/00
- IPC分类号： F01N11/00 ; F02D41/14 ; F01N3/20
摘要：
A control system and method maintains engine air/fuel operation near stoichiometry (104-178) in response to exhaust gas oxygen sensors (44,52) positioned both upstream and downstream of a catalytic converter (50). A non-catalytic exhaust gas oxygen sensor (54), having non-catalytic electrode, is positioned downstream of the converter (50) and its output voltage (Vo) monitored. Pumping current (Ip) is applied to an electrode of the non-catalytic sensor at a predetermined magnitude (IPREF) from a pumping current generator (56). When the output voltage (Vo) is detected at a predetermined high voltage range (302-318) an indication of degraded converter efficiency is provided (320).
公开/授权文献
- US6163688A Oscillator and communications device 公开/授权日：2000-12-19