Fuel supply pump capable of lubricating cam bearings

Details Fuel supply pump capable of lubricating cam bearings Fuel supply pump capable of lubricating cam bearings

2008-01-01

2008-01-01

Stashick, Anthony (Department: 3746)

Pumps

Successive stages

With interstage discharge or additional discharge from...

C417S313000

Reexamination Certificate

active

10788321

ABSTRACT:
A fuel supply pump uses a low-pressure supply pump for pumping up a low-pressure fuel, and a pump element having a plunger for increasing pressure of the low-pressure fuel supplied by the low-pressure supply pump. Part of the low-pressure fuel discharged from the low-pressure supply pump is supplied to a pump cam chamber as a lubrication fuel for sliding portions in the pump cam chamber. Part of the lubrication fuel in the pump cam chamber is sucked in or supplied by the low-pressure supply pump from a fuel film portion. Therefore, the lubrication fuel can be forcibly supplied to the bearing portions using the low-pressure supply pump in a uniform flow rate to the bearing portions, thereby stabilizing lubricating conditions of the bearing portions.

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EPO Examination Report, Application No. 04005693.9-2331, Mar. 14, 2006.
Japanese Office Action dated Jun. 13, 2006 (with English translation).

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