Vapor separator for a fuel pump assembly
US6581579B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2002 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Jun 19, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86212
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel pump assembly for use with a fuel injected combustion engine has a liquid cooled vapor separator from which conditioned fuel is drawn by a high pressure fuel pump. The vapor separator has an internal heat conductive sleeve which defines a fuel chamber or reservoir. A coolant chamber surrounds the heat conducting sleeve and is carried laterally between an exterior housing of the fuel pump assembly and the internal sleeve. A coiled baffle disposed within the coolant chamber forms a coolant channel which spirals about the sleeve. The channel has a first end which communicates with a coolant passage inlet and an opposing second end which communicates with a coolant passage outlet carried by the housing. The introduction of the baffle, therefore the channeling of coolant flow through the spiraling channel, improves the fuel cooling efficiency of the vapor separator by eliminating hot spots created by stagnate or non-flowing coolant areas within the coolant chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.