Fuel injection device, in particular, a unit fuel injector, for internal combustion engines
US4951631A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Apr 19, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a fuel injection device for internal combustion engines, having a pump plunger driven via a drive cam and a pressure chamber disconnected from a pump chamber by an intermediate plunger that upon its working stroke always assumes the end positions, a pressure line that leads from the pressure chamber to an injection nozzle. A control valve in a supply line for low-pressure fuel metering, the supply line is connected, under the control of the pump plunger with the pressure chamber via a filling line during a first intake stroke segment, for an injection quantity metering that is also angle controlled, and toward the end of the intake stroke of the pump plunger, the supply line is connected to the pump chamber for a time-controlled metering that determines the injection onset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.