Fuel injection installation for an internal combustion engine
US4719889A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 20, 1987 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Jan 20, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Upstream of the electrically operated fuel injectors for each engine cylinder there is connected a common pressure reservoir subject via a valve to the action of a continuously delivering fuel pump as a function of the engine speed and load. The common pressure reservoir is continuously connected by means of an annular chamber and a throttle to a channel in each fuel injector. Each fuel injector has a solenoid or magnetic valve operable for each fuel injection process and during the operation thereof connects said channel with a fuel return pipe and consequently relieves or releases the nozzle needle closing the fuel injection opening, thus releasing the discharge of fuel from a pressure chamber located directly upstream of the fuel injection opening. The channel is continuously connected via a throttle bore bridging a check valve to a control chamber controlling the nozzle needle movement. The pressure chamber is connected to a second pressure chamber associated with the related fuel injector and located in the vicinity thereof and is connected by the second pressure chamber to the common pressure reservoir. The fuel injection course can be influenced by the size of the throttle b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.