Internal-combustion engines – Charge forming device – With fuel pump
Patent
1981-05-04
1983-08-02
Myhre, Charles J.
Internal-combustion engines
Charge forming device
With fuel pump
123179L, F02M 5934
Patent
active
043959903
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:
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patent: 3358662 (1967-12-01), Kulke
patent: 3633559 (1972-01-01), Eheim
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patent: 3665907 (1972-05-01), Laufer
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patent: 3815564 (1974-06-01), Suda et al.
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Eheim Franz
Faupel Werner
Gotz Edgar
Hofer Gerald
Konrath Karl
Dolinar Andrew M.
Greigg Edwin E.
Myhre Charles J.
Robert & Bosch GmbH
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