Title:
【発明の名称】自動変速機の変速制御装置
Document Type and Number:
Japanese Patent JP2623772
Kind Code:
B2
Abstract:
A hydraulic control apparatus for controlling a hydraulically operated automatic transmission, having a speed sensor for detecting the speed of a rotary member which changes due to a shifting action of a frictionally coupling device. The apparatus includes a device for determining, based on the detected speed of the rotary member, that the shifting action of the coupling device is completed, and a device which is operated in the event of a failure of the speed sensor, for determining that the shifting action of the coupling device is completed when a time which has passed after the moment at which the need to effect the shifting action was determined or at which a shifting command to initiate the shifting action was generated exceeds a predetermined time interval. Upon determination of the completion of the shifting action, an electronic device terminates an operation to control the back pressure of an accumulator for adjusting the fluid pressure applied to the coupling device.
Inventors:
Yuji Kashihara
Kunihiro Iwatsuki
Yutaka Taga
Kunihiro Iwatsuki
Yutaka Taga
Application Number:
JP23843788A
Publication Date:
June 25, 1997
Filing Date:
September 22, 1988
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F16H61/02; F16H61/06; F16H3/44; F16H61/08; F16H61/10; F16H61/12; F16H59/68; (IPC1-7): F16H61/12; F16H61/06
Domestic Patent References:
| JP61149657A |
Attorney, Agent or Firm:
Takehiro Makino (2 outside)