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公开(公告)号：US20230417631A1
公开(公告)日：2023-12-28
申请号：US17809233
申请日：2022-06-27
发明人： Jose Francisco Martinez Leyva , Andrew Bagnasco , Tyler DeWine , Hassene Jammoussi , Adam Krach , Gladys Galicia
IPC分类号： G01M15/10
CPC分类号： G01M15/104
摘要： A method and system for monitoring an exhaust gas sensor coupled in an engine exhaust is provided. In one example, the method determines an estimate of an exhaust gas oxygen sensor time constant according to a correlation between a rate of change of a Lambda value and a system time constant.
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公开(公告)号：US20240272038A1
公开(公告)日：2024-08-15
申请号：US18168301
申请日：2023-02-13
发明人： Andrew Bagnasco , Jose Francisco Martinez Leyva , Tyler DeWine , Hassene Jammoussi , Adam Krach , Gladys Galicia
CPC分类号： G01M15/104 , F02D21/04 , F02D21/08 , F02D35/0046 , F02D41/1454 , F02D41/1476 , F02D41/1495 , F02D2021/083 , F02D2700/0287
摘要： A method and system for monitoring an exhaust gas sensor coupled in an engine exhaust is provided. In one example, the method determines an estimate of an exhaust gas oxygen sensor time constant according to a comparison of air/fuel ratios and a system time constant.
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公开(公告)号：US11649780B1
公开(公告)日：2023-05-16
申请号：US17806644
申请日：2022-06-13
CPC分类号： F02D41/1495 , F02D41/0087 , F02D41/1454 , F02D41/401 , G01M15/104 , F02D2041/228 , F02D2200/101
摘要： A method and system for monitoring an exhaust gas sensor coupled in an engine exhaust is provided. In one example, the method adjusts an estimate of an exhaust gas oxygen sensor delay time based on a fuel injection ramping time. The fuel injection ramping time compensates for fuel that is injected to the engine while the engine enters or exits a fuel cut-off mode.
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