Method and arrangement for checking the tightness of a vessel
US6820467B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 2003 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Feb 3, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0818
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for checking the tightness of a vessel and especially of a tank-venting system of a motor vehicle. In the method, at least a reference leak (42) or the vessel is subjected to an overpressure or underpressure with at least one pressure source. At least one characteristic variable of the pressure source is determined (reference measurement or diagnostic measurement) and these characteristic variables are compared to each other and a conclusion is drawn as to the presence of a leak from the result of the comparison. The pumping power of the at least one pressure source is changed during the reference measurement and/or during the diagnostic measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.