Safety valve for fuel injection apparatus
US5295469A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Aug 27, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M63/005
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A safety valve provided in a fuel injection apparatus includes an accumulator in which fuel is accumulated. The housing has an inside passage for introducing high-pressure fuel of the accumulator into the inside of the housing and a seat face formed at a portion of the inside passage. A valve element provided movably within the housing includes a valve body to open/close the seat face and an elastic member for pressing and biasing the valve element in a closing direction. A fuel chamber defined between the inner surface of the housing and the valve element maintains pressure for pressing the valve element in a valve-opening direction, and high pressure fuel from the inside passage is introduced into the fuel chamber when the valve body of the valve element is separated from the seat face. With this safety valve, the high-pressure fuel of the accumulator is introduced into the fuel chamber in order to press the valve element in the valve-opening direction so that the valve element will be rapidly opened, with the result that the fuel pressure in the accumulator can recover a predetermined value instantaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.