# US 4,391,257 A · Fuel injection pump for internal combustion engines

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- Number: US 4,391,257 A
- Document ID: US4391257A
- Status: Granted
- Kind: A
- Application number: 06/121,867
- Filed: 1980-02-15
- Granted: 1983-07-05
- Earliest claimed: 1979-03-10
- Assignees: Robert Bosch GmbH
- Inventors: Franz Eheim
- Web page: https://patentgrep.com/patent/US4391257A

## CPC

- F02D 1/127: {using the pressure developed in a pump}
- F02M 41/126: {valves being mechanically or electrically adjustable sleeves slidably mounted on rotary piston}
- F02M 63/022: {by acting on fuel control mechanism}
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF

## Abstract

The invention relates to a fuel injection pump wherein the fuel delivery to the engine is interrupted by means of a magnet. To this end, the magnet engages the governor lever at least indirectly, the governor lever is also arranged to engage the rpm governor of the fuel injection pump and further being coupled in a force-locking manner with the fuel quantity contorl member.

## Claims

### Claim 1

A fuel injection pump having a housing for internal combustion engines having a control member for a fuel injection quantity actuatable by means of an adjusting member of an rpm governor via a governor lever and a drag spring which stresses said governor lever counter to a shut off direction which permits a sufficient range of motion relative to said rpm governor, and further having an electric servomotor, said servomotor including an electromagnet, an armature and a force spring which drives against said armature for adjusting the control member into a stop position in which a fuel supplied by the pump is diverted and not used, characterized in that said armature of said servomotor engages said governor lever and therethrough is connected in a force-locking manner with said control member so that upon the adjustment effected by means of said servomotor, the position of said adjusting member of the rpm governor remains unchanged, and said force spring acts upon said armature so that a fuel diversion, when the electromagnet is switched off, is triggered via said force spring and said armature.