System and method for diagnosing flow through a purge valve based on a fuel system pressure sensor
US9176022B2 · kind B2 · utility
2Cited by
36References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Jun 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system according to the principles of the present disclosure includes a pressure sensor, a pressure variation module, and a purge flow diagnostic module. The pressure sensor generates a pressure signal indicating a pressure within a fuel system of an engine. The pressure variation module determines an amount of variation in the pressure signal over a period. The purge flow diagnostic module diagnoses a fault associated with flow through a purge valve of the fuel system when the pressure variation amount is less than a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.