Injection pump for internal combustion engines

Details Injection pump for internal combustion engines Injection pump for internal combustion engines

1989-03-29

1990-09-18

Smith, Leonard E.

Pumps

Expansible chamber type

Pumping member position controlled port

417499, 123299, F04B 704, F02B 300

Patent

active

049574183

ABSTRACT:
An injection pump for internal combustion engines having a pump piston and a pump piston bushing, to which a suction chamber is connected, the connection of the suction chamber to the work chamber of the pump is overtaken by the pump piston upon supply onset, and in which a diversion of the pump pressure at the end of supply is effected by re-opening the communication with the suction chamber. At least one separate diversion chamber, defined by a pressure maintenance valve and a throttle is connected to the work chamber via a connection that is likewise openable and closable upon the compression stroke; this connection to the work chamber is opened earlier, at the end of pump supply, than a further connection to the suction chamber.

REFERENCES:
patent: 3368491 (1968-02-01), Shook et al.
patent: 4172699 (1979-10-01), Hafele

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