Method and system for engine cooling system control
US9458759B2 · kind B2 · utility
10Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2014 |
| Grant date | Oct 4, 2016 |
| Priority date | — |
| Expiry date | May 1, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P11/14
- 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 output from an ultrasonic signal transmitted by a sensor positioned in a recess at the bottom of the vertical standpipe. Sensor power usage is optimized based on the ratio of first order and higher order harmonic echo times in the raw data set generated by the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.