发明名称 |
Catalyst condition monitor based on differential area under the oxygen sensors curve algorithm |
摘要 |
A control system and method of monitoring a condition of a catalyst in a catalytic converter includes commanding a first air/fuel ratio. A first signal is monitored from a first oxygen sensor and a second signal from a second oxygen sensor. A second air/fuel ratio is commanded. A first time is determined based on the first oxygen sensor reaching a first threshold voltage. A second time is determined based on the second oxygen sensor reaching a second threshold voltage. A differential area defined by the first and second signals between the first and second times is calculated.
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申请公布号 |
US7536851(B2) |
申请公布日期 |
2009.05.26 |
申请号 |
US20050077527 |
申请日期 |
2005.03.10 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
MC LAIN KURT D. |
分类号 |
F01N3/00 |
主分类号 |
F01N3/00 |
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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