Fuel rail pressure sensor diagnostic techniques
US9394845B2 · kind B2 · utility
4Cited by
13References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2013 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Nov 13, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0602
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A first computer-implemented diagnostic method can run in response to an imminent deceleration fuel cutoff (DFCO) event. A second computer-implemented diagnostic method can run on engine shutdown. Both diagnostic methods involve controlling fuel injectors and a fuel pump to make the fuel rail pressure change from a desired minimum to a desired maximum. Measurements from the fuel rail pressure sensor at these endpoints can then be used to detect a fault of the fuel rail pressure sensor. One or both diagnostic methods can be implemented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.