Title:
【発明の名称】電油制御式自動変速機の機能検査方法
Document Type and Number:
Japanese Patent JP2003524737
Kind Code:
A
Abstract:
The method for testing the function of an electrohydraulically controlled automatic transmission upon a testing stand by simulation of a vehicle operation provides that the output shaft of the transmission be connected with a stationary torque-measuring hub and be blocked thereby; the shifting elements existing in the transmission are tested when the output shaft is blocked with an input rotational speed which is precisely sufficient to supply with hydraulic pressure the pressure setting members for the shifting elements. As characteristic quantity can be used the setting member current at which the shifting element slips or at which the slip tends toward zero when the shifting element closes.
Inventors:
Marx, Henneken
Application Number:
JP2001512202A
Publication Date:
August 19, 2003
Filing Date:
July 15, 2000
Export Citation:
Assignee:
ZF FRIEDRICHSHAFEN AG
International Classes:
G01M13/02; F16H61/00; G01M13/021; (IPC1-7): F16H61/00
Attorney, Agent or Firm:
Kenji Yoshitake (5 others)