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Patent Searching and Data


Title:
SPEED-CHANGE CONTROLLER FOR AUTOMATIC TRANSMISSION
Document Type and Number:
Japanese Patent JP2006105249
Kind Code:
A
Abstract:

To provide a speed-change controller for an automatic transmission capable of protecting a damper of a lock-up clutch, and realizing a favorable driving feeling by not carrying out engine torque suppression in a situation wherein an excessive load is not applied to the lock-up clutch.

A lock-up engagement judging means is provided for judging an engagement state of the lock-up clutch. A coast-drive judging means is provided for judging whether a vehicle is in a drive state or a coast state. An engine torque state quantity judging means is provided for carrying out judgement of whether a temporal variation of a quantity of state regarding engine torque is less than a predetermined value. A suppression control prohibiting means is provided for prohibiting torque suppression control on the basis of judgements of the lock-up engagement judging means, the coast-drive judging means, and the engine torque state quantity judging means.


Inventors:
Akaike, Tsutomu
Application Number:
JP2004000291866
Publication Date:
April 20, 2006
Filing Date:
October 04, 2004
Export Citation:
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Assignee:
JATCO LTD
International Classes:
F16H61/14; B60W10/02; B60W10/04; F02D29/00; F02D45/00; F16H59/16; F16H59/38; F16H59/42; F16H59/44; F16H59/70
Attorney, Agent or Firm:
綾田 正道