发明名称 |
METHOD OF DIAGNOSING A LOW RANGE LIMITING MALFUNCTION OF AN ENGINE COOLANT TEMPERATURE SENSOR |
摘要 |
Low range limiting malfunctions of an engine coolant temperature (ECT) sensor are diagnosed by comparing a change in the sensed temperature during engine operation with a calibrated temperature change. If the change in sensed temperature fails to exceed the calibrated temperature change, and a diagnostic for detecting a stuck ECT signal is either inconclusive or passed, a low range limiting malfunction of the sensor is indicated. If the diagnostic for detecting a stuck ECT signal is failed, the low range limiting diagnostic concludes with no report even if the change in sensed temperature fails to exceed the calibrated temperature change.
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申请公布号 |
US2007073509(A1) |
申请公布日期 |
2007.03.29 |
申请号 |
US20050234408 |
申请日期 |
2005.09.23 |
申请人 |
RAHMAN MAHFUZUR;SIMPSON KENNETH M |
发明人 |
RAHMAN MAHFUZUR;SIMPSON KENNETH M. |
分类号 |
G01K1/00;G01K3/00;G01K11/00 |
主分类号 |
G01K1/00 |
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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