Injection system for a valve of a diesel engine
US4757794A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 17, 1985 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Apr 17, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The valve needle of the injection valve is actuated by a control pressure created by a hydraulic injection system. The control pressure is created by a piston pump and is supplied via a control line to the injection valve. At the beginning of the stroke, a bypass flow path is open with a cross section which decreases continuously with progressing piston stroke. With the aid of the pressure medium volume flowing out through the bypass flow path and decreasing in the course of the stroke, a control pressure which is free from pressure waves and their reflections in the control line and which continuously approaches a desired value is created and supplied through the control line to the valve needle without pressure fluctuations causing an oscillating opening and closing of the needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.