Fuel injection pump

Details Fuel injection pump Fuel injection pump

1977-10-25

1981-06-16

Myhre, Charles J.

Internal-combustion engines

Charge forming device

With fuel pump

123500, 123506, 123179L, F02M 5934

Patent

active

042730902

ABSTRACT:
A fuel injection pump for Diesel engines in which a rotating and reciprocating piston pressurizes and distributes fuel to individual pressure lines leading to the injection valves of the engine. In order to change the timing of injection with respect to the engine cycle, there is provided a mechanism to change the relative angle between the pressurizing piston and its drive means, which runs in synchronism with the engine. The mechanism operates hydraulically and is affected by the fuel pressure in the sump of the injection pump. There is also provided a hydraulic control valve mechanism which permits varying amounts of fuel to flow back from the sump to the low pressure side of the fuel delivery pump, thereby changing the injection timing. A primary control valve adjusts the sump pressure on the basis of engine speed while a secondary control valve adjusts the sump pressure on the basis of engine temperature in order to adapt the timing of fuel injection to engine starting and engine warm-up. Various embodiments are presented.

REFERENCES:
patent: 2984232 (1961-05-01), Arndt et al.
patent: 3633559 (1972-01-01), Eheim
patent: 3638631 (1972-02-01), Eheim
patent: 3815564 (1974-06-01), Suda et al.
patent: 3906916 (1975-09-01), Laufer
patent: 4122813 (1978-10-01), Barnert et al.
patent: 4132211 (1979-01-01), Wilfert et al.

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