Fuel injection system with employing vane type fuel pump
US5630399A · kind A · utility
14Cited by
11References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1995 |
| Grant date | May 20, 1997 |
| Priority date | — |
| Expiry date | Sep 8, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M69/462
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection system includes a vane-type fuel pump. The fuel pump has a first bypass passage with a first pressure relief valve for relieving pressurized fuel from a discharge passage downstream of a check valve to the discharge passage upstream of the check valve so that excess pressure in the discharge passage downstream of the check valve can be relieved to the discharge pressure upstream of the check valve. Therefore, fuel leakage through a fuel injection valve can be prevented for avoiding possibility of formation of overrich mixture even upon hot start condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.