Quick priming fuel system and common passageway housing for same
US6701900B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2003 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Mar 4, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M37/46
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In some fuel systems, such as those associated with a diesel engine, most if not all of the air that has leaked or been introduced into the fuel system must be evacuated before the fuel injectors can work properly to start the engine. Because such systems often utilize a pressure regulating valve to maintain the fuel system at some pressure, which is often substantially higher than atmospheric pressure, it can be difficult to evacuate air without first raising the air pressure in the fuel system above that which is required to open the pressure regulating valve. In addition, evacuating air from the fuel system can sometimes involve pushing the air through the fuel injectors in order to evacuate the same to the fuel tank. A quick priming fuel system includes air bleed passages that circumvent both the pressure regulating valve and the fuel injectors so that air can be quickly evacuated from the system at a relatively low pressure. These bleed bypass passageways are relatively restrictive to liquid flow so as not to undermine system pressure or otherwise undermine fuel supply to the fuel injectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.