Hydraulic pump
US4662825A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1985 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Aug 5, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M59/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A supply pump for continuously supplying pressurized fuel to an accumulator-type injector system employs an electrically controlled metering valve for regulating the supply of fuel to the pump chamber. The output pressure of the pressurized fuel from the pump is regulated by means of a relief valve assembly. The inlet metering valve also controls the operation of the relief valve assembly. The relief valve assembly comprises a hydraulically controlled piston which selectively controls the position of a valve member for releasing pressurized fuel from the outlet portion of the pump so that the pressurized fuel in the injection system may be regulated by controlling the fuel supply to the pump chamber and by also releasing pressurized fuel from the pressurized injection system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.