High pressure pump with a close-mounted valve for a hydraulic fuel system
US6450146B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Dec 12, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/225
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
This invention provides a pump with a close-mounted valve for a hydraulic fuel system in an internal combustion engine. The hydraulic fuel system may have a high pressure pump connected to a low pressure side and high pressure reservoirs. The pump has a drive shaft, a shaft cylinder, one or more cylinders, and a close-mounted valve. The close-mounted valve has a valve body, a valve spool, a valve spring, and a valve coil. The valve body is positioned inside a shaft cavity formed by the shaft cylinder. The close-mounted valve may control the volume and pressure to reduce or eliminate the dumping of high-pressure hydraulic fluid in the hydraulic fuel system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.