Pumps – With condition responsive pumped fluid control – Variable cutoff or pumping member controlled port
Patent
1986-12-15
1987-12-22
Freeh, William L.
Pumps
With condition responsive pumped fluid control
Variable cutoff or pumping member controlled port
123503, F04B 4902, F04B 4900
Patent
active
047144122
ABSTRACT:
A fuel injection pump which has a shutoff device for the fuel supply to the pump work chamber, comprising a magnetic valve, which controls an intake bore to the work chamber of the fuel injection pump. The fuel injection pump further has a relief conduit, which is connected by an annular slide on the pump piston with the suction chamber in order to terminate the effective supply stroke of the pump piston. In order to assure reliable shutoff of the fuel supply to the pump work chamber, a check valve is further disposed in the connection between the pump work chamber and the suction chamber, which check valve is closed, during the intake stroke of the pump piston, with the collaboration of the pressure drop from the suction chamber to the pump work chamber.
REFERENCES:
patent: 2599018 (1952-06-01), Rogers
patent: 2928352 (1960-03-01), Aldinger
patent: 3311062 (1967-03-01), Knapp et al.
patent: 3742926 (1973-07-01), Kemp
patent: 3848576 (1974-11-01), Hofer
patent: 4073275 (1978-02-01), Hofer
patent: 4467767 (1984-08-01), Kampichler
patent: 4478187 (1984-10-01), Yamada
patent: 4583508 (1986-04-01), Schechter
Bohringer Wilfried
Eheim Franz
Hofer Gerald
Konrath Karl
Laufer Helmut
Freeh William L.
Greigg Edwin E.
Robert & Bosch GmbH
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