Fuel injection pump for internal combustion engines

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

1987-12-22

1989-10-03

Miller, Carl Stuart

Internal-combustion engines

Charge forming device

Fuel injection system

123496, 123503, F02M 3900

Patent

active

048709360

ABSTRACT:
A fuel injection pump of the distributor type in which a pump piston is driven to reciprocate and rotate simultaneously, thereby acting as a distributer. For fuel injection quantity regulation, an annular slide that is displaceable on a pump piston is provided, by way of which the pump work chamber can be relieved. To attain a low injection rate in the idling range, in addition to a first outlet opening, controlled by an upper edge of the annular slide, second outlet openings axially offset from the first are provided, for a relief conduit of the pump work chamber which cooperate with a radial control opening, which communicates with the pump suction chamber and is disposed in the wall of the annular slide. In the opening direction of this control opening, a groove provided with a throttle is provided, by way of which during idling operation, prior to the opening of the first relief opening, fuel can flow out of the pump piston in order to decrease the pumping rate of the pump piston. For higher load ranges, the control opening is moved out of the operative range of the groove which is effected by rotating the annular slide or interrupting the communication of the control opening with the suction chamber.

REFERENCES:
patent: 3758241 (1973-09-01), Eheim
patent: 3999529 (1976-12-01), Davis
patent: 4211520 (1980-07-01), Kranc
patent: 4220128 (1980-09-01), Kobayashi
patent: 4409939 (1983-10-01), Eheim
patent: 4413600 (1983-11-01), Yanagawa
patent: 4649883 (1987-03-01), Bohringer
patent: 4662337 (1987-05-01), Eheim
patent: 4763631 (1988-08-01), Fehlmann

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