Fuel pump with integral accumulator
US4571159A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1985 |
| Grant date | Feb 18, 1986 |
| Priority date | — |
| Expiry date | Mar 4, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C15/0049
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A motor driven fuel pump assembly has an integral accumulator. The fuel pump is a two-stage pump with the secondary stage being a positive displacement unit such as a roller vane pump. The fluid output of the secondary pump is connected with a space surrounding the drive motor for the pump. The space is defined partially by a resilient membrane which is operable to expand with pressure increases and thereby absorb and damp the pressure and flow fluctuations from the secondary stage pump. The membrane member effectively provides a moving wall of an accumulator which serves to provide the damping effect on the flow and pressure variations within the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.