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Title:
OIL PUMP FOR AUTOMATIC TRANSMISSION OF MOTOR VEHICLE
Document Type and Number:
Japanese Patent JP2005220910
Kind Code:
A
Abstract:

To provide an oil pump for an automobile transmission which has improved efficiency over all operation ranges and in which a discharge flow rate preferably has no relation with speed of an internal combustion engine.

In the oil pump for the automobile automatic transmission having a gear housing (2), a pump casing (1) and a pump rotor (3) driven by the automobile engine, to improve the application possibility of this pump for the automobile, the pump casing (1) is made driveable, and thereby, relatively rotational speed between the pump rotor (3) and the pump casing (1) is made variable.


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Inventors:
Schwarz, Josef
Frotscher, Gerd
Schmidt, Thilo
Application Number:
JP2005000025010
Publication Date:
August 18, 2005
Filing Date:
February 01, 2005
Export Citation:
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Assignee:
ZAHNRADFAB FRIEDRICHSHAFEN AG
International Classes:
F04C14/00; F04B17/00; F04B35/00; F04C2/08; F04C2/10; F04C11/00; F04C15/00; F16H57/02; F16H57/04; F16N13/20; (IPC1-7): F04C15/04; F16H57/02
Domestic Patent References:
JP2545575B21996-10-23
JPH0629628B2
JPS3915750Y1
JPH11343983A
JPS4865505A
Attorney, Agent or Firm:
吉武 賢次
永井 浩之
岡田 淳平
勝沼 宏仁
森 秀行