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Title:
HYDRAULIC VALVE FOR HYDRAULIC CONSUMPTION MACHINE FOR AUTOMOBILE
Document Type and Number:
Japanese Patent JP2000230586
Kind Code:
A
Abstract:

To facilitate the adjustment in assembling a hydraulic valve provided with two valve elements and having a bent characteristic line progress by providing one of the valve elements with two pressure return surfaces to be controllably loaded with the pressure fluid, and forming the other valve element so as to control the load of the pressure return surfaces.

This hydraulic valve 3 used for controlling multiple disk clutch of an automobile has a first valve piston 9 to be housed in a casing 4, and this valve piston 9 is displaced by the pressure fluid to be applied to a control surface 12. With the axial movement of this valve piston 9, a flow passage from a pump 5 to a flow-in chamber 8 is opened in a range of a neck part 18 of the valve piston 9, and the pressure fluid is led out to a multiple disk clutch through a fluid connecting part 20. Working pressure at leading out the pressure fluid is applied to a pressure return chamber 21a via a throttle 22, and the pressure return surface 23 of the valve piston 9 is loaded with the working pressure. A second piston 25 as a pressure reducing valve is fitted in the valve piston 9 to control the pressure load of the pressure return surface 26 of the valve piston 9.


Inventors:
EBINGER GUENTER
HOMM MANFRED
Application Number:
JP2000000026513
Publication Date:
August 22, 2000
Filing Date:
February 03, 2000
Export Citation:
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Assignee:
LUK LAMELLEN & KUPPLUNGSBAU
International Classes:
F16K17/196; F15B13/04; F15B13/042; F16D48/02; (IPC1-7): F16D48/02; F16K17/196
Domestic Patent References:
JPH1089448A1998-04-07
JPH1089448A1998-04-07
Attorney, Agent or Firm:
矢野 敏雄 (外4名)