Leak detection system for a vehicle fuel tank
US7140235B2 · kind B2 · utility
5Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Feb 18, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A leak detection system for a vehicle fuel tank includes a sensor that is responsive to a pressure within the fuel tank and that generates a pressure signal based thereon. A control module initiates an engine-off natural vacuum (EONV) test and determines a pressure change based on the pressure signal. The control module pauses the EONV test when the pressure change exceeds a pressure change threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.