Failure diagnosis method of coolant temperature sensor for vehicle
US10767548B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Sep 19, 2018 |
| Grant date | Sep 8, 2020 |
| Priority date | — |
| Expiry date | Nov 8, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P2060/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A failure diagnosis method of a coolant temperature sensor for a vehicle, may include determining, by a controller, whether or not it is in a flow stop state that stagnates the flow of coolant by a flow control valve; obtaining, by the controller, an engine outlet coolant model temperature when it is in the flow stop state; and diagnosing, by the controller, as a failure of an engine outlet-side outlet water temperature sensor when the coolant model temperature is equal to or greater than a reference temperature and the flow stop state is maintained by the flow control valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.