Device for adjusting the pumping capacity of a lubricant...

Details Device for adjusting the pumping capacity of a lubricant... Device for adjusting the pumping capacity of a lubricant...

2003-07-01

2009-06-23

Freay, Charles G (Department: 3746)

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

C418S030000

Reexamination Certificate

active

07549848

ABSTRACT:
A system for controlling the pumping capacity of a lubricant pump for an internal-combustion engine, having a vane cell pump (2) which has a rotor body (4), rotor blades (10) which can be radially displaced in the rotor body as well as a lifting ring (12) (stator) whose position can be adjusted with respect to the axis of rotation of the rotor for changing the delivery volume as a function of operating parameters of the internal-combustion engine. The lifting ring (12) is linked to an adjusting piston (28) guided in a valve bore (30) of a pressure regulating valve (26), which adjusting piston (28) is acted upon by engine oil pressure on a piston front side (34), the piston front side (34) being connected with the piston rear side (37) by way of a throttle bore (62).

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patent: 6790013 (2004-09-01), Hunter et al.
patent: 2002/0025257 (2002-02-01), Zagranski et al.
patent: 4038549 (1992-01-01), None
patent: 4428410 (1998-05-01), None
patent: 1043504 (2000-10-01), None
German Office Action.
International Search Report.

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