Fuel injection pump for a two-stroke engine in a work apparatus

Details Fuel injection pump for a two-stroke engine in a work apparatus Fuel injection pump for a two-stroke engine in a work apparatus

1992-08-03

1993-03-30

Okonsky, David A.

Internal-combustion engines

Two-cycle

Rear compression

12317914, 123504, 417214, F04B 4306

Patent

active

051974177

ABSTRACT:
The invention is directed to a fuel injection pump for a two-stroke engine mounted in a work apparatus such as a motor-driven chain saw. The injection pump includes a pneumatic drive chamber which is charged with the crankcase pressure of the two-stroke engine. A membrane mounted in the drive chamber transmits the pulses of the crankcase pressure to a pump piston which moves into a pump chamber against the force of a leaf spring. The leaf spring is configured as a leaf spring packet of individual leaf springs in order to obtain an adaptation of the injected fuel quantity to the position of the throttle flap of the engine.

REFERENCES:
patent: 3653784 (1972-04-01), Leitermann et al.
patent: 4269400 (1981-05-01), Jensen
patent: 4383504 (1983-05-01), Walsworth
patent: 4539949 (1985-09-01), Walsworth
patent: 4807573 (1989-02-01), Schierling et al.
patent: 4813391 (1989-03-01), Geyer et al.
patent: 4846119 (1989-07-01), Geyer et al.

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