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US 8,230,975 B2Granted
Device and method for supplying lubricating oil
AssigneeAudi AG
InventorsFranz Lukas, Volker Verhees, Dieter Böhm
Life of this patent
Estimating the term…
Abstract
The invention relates to a device for feeding lubricating oil to an internal combustion engine. This device comprises a lubricating oil pump and an oil pressure regulating apparatus. The lubricating oil pump is designed as a reciprocating piston valve pump and the oil pressure regulating apparatus is designed as a multistage oil pressure regulating apparatus.
Claims5
An apparatus for supplying oil to an internal combustion engine, comprising:
- a variable displacement type vane pump including biasing means for eccentrically displacing a vane carrying ring thereof relative to a rotor thereof to provide first and second flow rates;
- and
- a regulator including,
- a first passageway intercommunicable with a source fluid under pressure and means for displacing said vane carrying ring;
- a second passageway intercommunicable with said displacing means and a drain;
- a spool having a portion displaceable in a chamber along a line of travel between a first position obstructing said first passageway and nonobstructing said second passageway, and a second position obstructing said second passageway and nonobstructing said first passageway;
- means for biasing said spool in a first direction along said line of travel to position said spool portion in said first position;
- a third passageway intercommunicable with said fluid pressure source and a surface of said spool disposed at an angle to said line of travel, functional upon communication with said fluid pressure source to displace said spool portion in said second position;
- and
- a valve in said third passageway operable in a first position obstructing said third passageway and a second position nonobstructing said third passageway.
7 more elements
An apparatus for supplying oil to an internal combustion chamber, comprising:
- a variable displacement type pump including biasing means for eccentrically displacing a vane carrying ring thereof relative to a rotor thereof to provide first and second flow rates;
- and
- a regulator including,
- a spool disposed in and displaceable along a line of travel, in a chamber, provided with a first surface disposed at an acute angle relative to said line of travel and a second surface disposed at an angle relative to said line of travel;
- means disposed in said chamber for biasing said spool in a first direction along said line of travel;
- a first passageway intercommunicable with a source of fluid under pressure and a portion of said chamber including said second surface of said spool, operable to displace said spool along said line of travel opposite to said first direction;
- and
- a second passageway intercommunicable with said chamber portion and a drain;
- and
- a valve in said second passageway operable in a first position obstructing said second passageway and a second position nonobstructing said second passageway;
- a follower displaceable along a second line of travel intersecting said first mentioned line of travel including a first portion received within said regulator and engaging said first surface of said spool and a second portion operatively connected to said means for eccentrically displacing said vane carrying ring of said pump;
- and
- means for biasing said first portion of said follower into camming engagement with said first surface of said spool.
10 more elements
Dependencies are inferred from the claim text.