Injection device for injecting an additional, small fuel quantity into an external auto-ignition internal combustion engine operating according to the stratified-charge principle
An injection device is described for injecting fuel into a combustion space such as an auxiliary combustion space of an external auto-ignition internal combustion engine of the type operating on the stratified-charge principle. The injection device includes a housing accommodating a movable pump plunger, a movable nozzle needle controlling the nozzle orifice opening into the auxiliary combustion space, and a movable piston-type storer. The pump plunger is configured to close off respective fuel return and fuel supply lines during its pumping stroke, at which time it effects a buildup of pressure resulting in movement of the piston type storer until a predetermined sufficient pressure is reached to force the nozzle needle away from the closed position to thereby effect injection of fuel into the auxiliary combustion space. An adjustable stop is provided at the piston-type storer and the supply fuel to the fuel supply line is under an adjustable pre-pressure, whereby the adjusted pre-pressure and the configuration of the piston-type storer control the amount of fuel injection.
- Assignee:
- Daimler-Benz AG
- Patent Number(s):
- US 4091771
- OSTI ID:
- 6653242
- Resource Relation:
- Patent Priority Date: Priority date 22 May 1974, German, Federal Republic of (F.R. Germany)
- Country of Publication:
- United States
- Language:
- English
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