Method and system for engine cooling system control
US9719409B2 · kind B2 · utility
3Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2014 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | May 29, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/88
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and systems are providing for improving engine coolant level estimation to reduce engine overheating. The level of fluid in a coolant overflow reservoir is inferred based on the fluid level in a hollow vertical standpipe fluidically coupled to the reservoir at top and bottom locations, while the fluid level in the standpipe is estimated based on echo times of an ultrasonic signal transmitted by a sensor positioned in a recess at the bottom of the vertical standpipe. Engine power is limited differently based on distinct coolant level states determined based on a change in level of coolant in the reservoir over a duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.