发明名称 |
Double air-fuel ratio sensor system having improved exhaust emission characteristics |
摘要 |
In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an air-fuel ratio correction amount is calculated in accordance with the results of the comparison of the outputs of the upstream-side and downstream-side air-fuel ratio sensors with first and second reference voltages, respectively, thereby obtaining an actual air-fuel ratio. The second reference voltage is changed in accordance with the load of the engine, to change the mean air-fuel ratio.
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申请公布号 |
US4809501(A) |
申请公布日期 |
1989.03.07 |
申请号 |
US19880144221 |
申请日期 |
1988.01.15 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
KAYANUMA, NOBUAKI;NAGAI, TOSHINARI |
分类号 |
F02D41/14;(IPC1-7):F02D41/14 |
主分类号 |
F02D41/14 |
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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