Title:
【発明の名称】自動変速機におけるトルクコンバータ・ロックアップクラッチの切換状態の決定方法
Document Type and Number:
Japanese Patent JP2000516691
Kind Code:
A
Abstract:
PCT No. PCT/EP97/03893 Sec. 371 Date Dec. 31, 1998 Sec. 102(e) Date Dec. 31, 1998 PCT Filed Jul. 19, 1997 PCT Pub. No. WO98/04852 PCT Pub. Date Feb. 5, 1998A process for tuning the switching state of a torque converter lock-up clutch (WK) in an automatic transmission to the output speed of rotation (n-ab) of the transmission output shaft or the wheel speeds of rotation (n-wheel) of driving wheels of a vehicle by means of an electronic transmission controller (EGS) with computer unit and an electronic pressure regulator (EDS) includes the following steps: a) from the wheel speeds of rotation (n-wheel) measured by a measurement device (1) on the driving wheels, or the output speed of rotation (n-ab) of the transmission output shaft, a time-related gradient of speed of rotation (dn/dt) is detected during activated state of the torque converter lock-up clutch by the computer unit in a processing function (S3); b) in a discriminating function (S4) is checked whether the amount of the gradient of speed of rotation (dn/dt) is higher than a threshold value (GW -1) and in the affirmative, a processing function (S6) is started for quick opening of the activated torque converter lock-up clutch (WK); c) in a discriminating function (S8) is checked whether a presettable interrupt criterion has been satisfied and in the affirmative a processing function (S9) is started for return to a main program, in the negative, a branching off in the processing function (S6) is effected for quick opening of the activated torque converter lock-up clutch (WK).
Inventors:
Friedemann, Yauf
Heinrich, Zeller
Heinrich, Zeller
Application Number:
JP50845698A
Publication Date:
December 12, 2000
Filing Date:
July 19, 1997
Export Citation:
Assignee:
ZF FRIEDRICHSHAFEN AG
International Classes:
F16H61/14; F16H59/48; (IPC1-7): F16H61/14
Attorney, Agent or Firm:
Kazuo Sato (3 others)