Gas in coolant diagnostics for internal combustion engine
US4102178A · kind A · utility
6Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1977 |
| Grant date | Jul 25, 1978 |
| Priority date | — |
| Expiry date | Mar 25, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M13/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A measurement of the quantity of gas entering or within the coolant of an internal combustion engine cooling system, is made with the engine running, preferably at high idle speed, and a test is performed to ensure that the thermostat is open, whereby it is known that coolant is circulating through the entire cooling system, by providing a radiator cap connected to an orifice of a known size that will allow gas to escape from the cooling system and measuring substantially the pressure differential across the orifice, such as by measuring the pressure on the radiator side of the orifice with respect to atmospheric pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.