Method of detecting a leaky exhaust valve
US5531100A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1995 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Mar 15, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is directed to a method of checking the tightness of exhaust valves of an internal combustion engine with the aid of an apparatus. The apparatus includes a device for forming a value LU for the uneven running of the engine and a device for metering air into a region disposed downstream of the exhaust valves as viewed in the flow direction of the exhaust gas. In the method, a first value LU1 is formed for the uneven running without air being supplied in the above-mentioned region and a second value LU2 is formed for uneven running with air being supplied in the above-mentioned region. An exhaust valve is deemed to leak when the first and the second values for the uneven running differ by more than a predetermined amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.