Engine shaft pump

Details Engine shaft pump Engine shaft pump

2006-02-28

2006-02-28

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Poppet valve operating mechanism

Lubrication

C123S1960CP, C184S031000, C384S288000

Reexamination Certificate

active

07004131

ABSTRACT:
A rotary shaft pump for increasing supplied oil pressure to a pressure responsive device in an internal combustion engine. The pump includes a housing adapted to carry a plurality of axially spaced journals of a rotatable shaft. The shaft also includes at least one pumping element having a larger diameter than the other journals of the shaft. A cam phaser carried on one end of the shaft receives pressurized oil from the engine through oil passages extending through the housing and the shaft. As the oil is pumped through the oil passages of the shaft, the oil is centrifugally pumped through a radially extending pumping passage extending though the pumping element to boost oil pressure supplied to the cam phaser.

REFERENCES:
patent: 5816205 (1998-10-01), Moriya
patent: 6189499 (2001-02-01), Iwata et al.

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