Fuel injection pump for internal combustion engines

Details Fuel injection pump for internal combustion engines Fuel injection pump for internal combustion engines

1993-07-20

1995-05-16

Bertsch, Richard A.

Pumps

Expansible chamber type

Biasing means effects eduction stroke of abutment driven,...

92129, 123 905, F04B 1900

Patent

active

054155339

ABSTRACT:
The invention relates to a fuel injection pump for internal combustion engines, having a pump piston guided in a cylinder bore of a pump body, which pump piston defines a pump work chamber in the cylinder bore and which is axially driven by a cam drive counter to the force of a restoring spring. Each individual cylinder of the engine to be fed is assigned a fuel injection pump, which is inserted into a bore in the engine housing; at the same time, the engine housing serves as the pump housing. In order to limit frictional wear, which is caused by the back-and-forth motion of the roller tappet of the cam drive guided in the engine housing and to easily replace pump parts, a thin-walled slide bush is disposed between the roller tappet and the housing bore. The slide bush is fastened with radial play on the pump body and additionally prevents the roller tappet from slipping out and prevents the preassembled fuel injection pump from falling apart when it is not installed in the housing bore.

REFERENCES:
patent: 2322356 (1943-06-01), Hahn
patent: 2372694 (1945-04-01), Tabb
patent: 2984405 (1961-05-01), Stump
patent: 3139076 (1964-06-01), Flaherty
patent: 4267977 (1981-05-01), Stockner et al.
patent: 4335685 (1982-06-01), Clouse
patent: 4499873 (1985-02-01), Lehner
patent: 4510796 (1985-04-01), Kampichler
patent: 4630587 (1986-12-01), Hofer et al.

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