发明名称 |
Cooling apparatus for internal combustion engine |
摘要 |
A cooling apparatus includes a thermostat that adjusts a feed rate of coolant to a radiator, estimating means that estimates a coolant temperature simulated value at least based on the detection value of an intake-air temperature sensor, and diagnosis means that diagnoses an operating state of the thermostat by comparing the detection value of a coolant temperature sensor, and the coolant temperature simulated value when a diagnosis condition is established. When a ratio of an integrated value of the simulated water temperature variation in an idle state to the integrated value of the simulated water temperature variation in a normal driving state is equal to or greater than an upper limit ratio XP, the diagnosis of the operating state of the thermostat is prohibited.
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申请公布号 |
US7409929(B2) |
申请公布日期 |
2008.08.12 |
申请号 |
US20060494527 |
申请日期 |
2006.07.28 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
MIYAHARA HIDEKI;ITO TOKIJI |
分类号 |
F01P7/00;F01P7/14;F01P7/16 |
主分类号 |
F01P7/00 |
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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