Title:
潤滑油ポンプおよびコントロール・ピストン
Document Type and Number:
Japanese Patent JP2013539510
Kind Code:
A
Abstract:
A lubricant pump includes a housing in which at least one pair of intermeshing gear wheels is arranged for conveying lubricant. One gear wheel is rotatably supported on a drive shaft and the other gear wheel is rotatably supported on an axially shiftable displacement unit for adjusting a variable flow volume. Axially displaceable in a housing receptacle is a control piston for hydraulically adjusting the position of the displacement unit. The control piston is configured as composite structural part and has a central longitudinal shaft and cylinder rings which include control edges for clearing or closing control channels feeding into the receptacle. The cylinder rings are made from a material which reduces friction and/or wear with respect to the receptacle, and the central longitudinal shaft has at least one section made from a material having a coefficient of thermal expansion at least substantially corresponding to the one of the receptacle.
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Inventors:
Ernst, Jürgen
Application Number:
JP2013509470A
Publication Date:
October 24, 2013
Filing Date:
May 11, 2011
Export Citation:
Assignee:
AUDI AG
International Classes:
F01M1/16; F01M1/02
Domestic Patent References:
| JPH07180775A | 1995-07-18 | |||
| JPH10192583A | 1998-07-28 | |||
| JPH11117034A | 1999-04-27 | |||
| JP2006194965A | 2006-07-27 | |||
| JP2000170946A | 2000-06-23 |
Foreign References:
| DE10324092A1 | 2004-12-16 |
Attorney, Agent or Firm:
Morimoto International Patent Office