Fuel pressure regulator
US4235211A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1979 |
| Grant date | Nov 25, 1980 |
| Priority date | — |
| Expiry date | May 17, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7832
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel pressure regulator for use in a fuel injection system for an internal combustion engine has a housing defining therein a fuel passage having upstream and downstream ends connected to a main fuel supply conduit and a fuel return pipeline, respectively. The fuel supply conduit is connected with fuel injectors at points upstream of the fuel pressure regulator. A first valve is provided in the fuel passage at a point downstream of a restriction also provided in the fuel passage. A fuel chamber is provided in the fuel passage between the restriction and the first valve. The first valve is opened when the fuel pressure in the fuel chamber exceeds a first predetermined pressure level to allow the fuel to flow from the fuel chamber to the return pipeline. A bypass fuel passage bypasses the restriction and has its downstream end connected to the fuel chamber. A second valve is provided in the bypass passage and is opened when the fuel pressure in the upstream end of the fuel passage exceeds a second predetermined pressure level higher than the first predetermined pressure level to allow the fuel to flow through the bypass passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.