Fuel filter with cold start circuit
US5887573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Jun 25, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M37/24
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel circuit for a fuel system including a fuel tank, a fuel injection system, and a fuel filter assembly. Excess fuel flow is recirculated from the fuel injection pump to the base of the fuel filter. The base includes an internal recirculated fuel passageway which is in fluid communication with the fuel injection pump and the fuel tank, an internal fuel inlet plenum that is in fluid communication with the fuel tank, and an internal fuel outlet passageway which is in fluid communication with the fuel injection system. An opening provides fluid communication between the recirculated fuel passageway and the fuel inlet plenum. A thermal flow control valve is positioned in the recirculated fuel passageway to open the opening when the recirculated fuel temperature is below a predetermined temperature and to close the opening when the recirculated fuel temperature is above the predetermined temperature. For pressurized fuel systems, a constant vent passageway provides fluid communication between the fuel outlet passageway and the recirculated fuel passageway to vent air from the filter assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.