Fuel system blockage detection and blockage location identification systems and methods
US8935081B2 · kind B2 · utility
2Cited by
33References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2012 |
| Grant date | Jan 13, 2015 |
| Priority date | — |
| Expiry date | Mar 9, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0809
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system for a vehicle includes a first pressure module and a blockage indication module. The first pressure module receives a signal from a pressure sensor that measures pressure within a fuel vapor purge system. The first pressure module generates a first pressure based on the signal at a first time and generates a second pressure based on the signal at a second time. The second time is after the first time. The blockage indication module indicates whether a blockage is present in the fuel vapor purge system between the pressure sensor and a fuel tank based on a difference between the first and second pressures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.