High pressure line connection strategy and fuel system using same
US6928984B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2004 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Feb 9, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M55/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
High pressure fluid systems, such as those found in common rail fuel systems for engines, often need a low pressure containment system to appropriately address the possibility of fuel leakage around the engine. In addition, such high pressure systems also often require flow to go from one location, such as the common rail, to another location, such as a fuel injector, while undergoing a direction change because of spacial constraints around the engine. The present invention utilizes an elbow component with valve surfaces on its two faces that are oriented at about 90° with respect to one another. When the elbow component is fastened to the head with first fasteners and fastened to a flow limiter housing in another direction with second fasteners, a quill tube is compressed between the valve surface on the elbow component and a similar conical seat on a fuel injector in one direction while also compressing a short tube and flow limiter between the other valve surface of the elbow component and the common rail. The low pressure containment system is sealed with O-rings. The high pressure connection can be serviced without dismantling other engine components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.