High-pressure pump for fuel delivery in fuel injection systems o

Details High-pressure pump for fuel delivery in fuel injection systems o High-pressure pump for fuel delivery in fuel injection systems o

1999-01-19

2000-02-08

Miller, Carl S.

Internal-combustion engines

Charge forming device

With fuel pump

123514, 417368, F02M 3704

Patent

active

060217618

ABSTRACT:
The invention relates to a high-pressure pump for fuel delivery in fuel injection systems of internal combustion engines, which includes a tank, a pre-feed pump, and the high-pressure pump. The pre-feed pump aspirates a total fuel flow from the tank and this total fuel flow is divided into a lubricating flow, which is conveyed through the high-pressure pump for the purpose of lubrication, and a delivery flow, which is acted on with high pressure by the high-pressure pump and is delivered to a common distributor rail. The fuel injection system prevents damage that could occur during operation. Damage is prevented because the total fuel flow is conveyed through the high-pressure pump for the purpose of lubrication, wherein a metering unit for the total fuel flow is provided in the high-pressure pump or in a return and assures that only a predetermined delivery flow is acted on with high pressure in the high-pressure pump. The fuel injection system according to the invention has the advantage that fewer separate parts are required. This reduces costs.

REFERENCES:
patent: 3781138 (1973-12-01), Bellmer
patent: 3873243 (1975-03-01), Nusser
patent: 4392463 (1983-07-01), Yasuhara
patent: 5058557 (1991-10-01), Frank
patent: 5139395 (1992-08-01), Kemmner
patent: 5146895 (1992-09-01), Fehlmann
patent: 5593287 (1997-01-01), Sadakata
patent: 5624243 (1997-04-01), Omadaka
patent: 5701872 (1997-12-01), Kaku

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