Title:
SPEED CHANGE CONTROL METHOD FOR AUTOMATIC SPEED CHANGE GEAR FOR CAR
Document Type and Number:
Japanese Patent JPS6110166
Kind Code:
A
Abstract:
PURPOSE:To prevent abrasion of a brake pad by conducting down-shift operation at a car velocity which will produce no speed change shock sensed by a driver's body during meandering, and conducting down-shift operation at a designated car velocity in such a manner that the rotational frequency of a torque converter becomes equal to the idling rev count during braking in an automatic speed change gear for a car. CONSTITUTION:In an automatic speed change gear 1 having an engine 100 and a fluid torque converter 3, during meandering, down-shift is conducted at a car velocity which will produce no large speed change shock sensed by a driver's body according to a basic speed change pattern. During braking, down-shift is conducted at a designated car velocity in such a manner that at each speed change step, the rotational frequency of a turbine of the fluid torque converter 3 becomes equal to the idling rev count of the engine 100. Thus, a brake pad of a brake for braking a car is avoided from being worn away in its early stage by driving force.
Inventors:
YASUE HIDEKI
Application Number:
JP12893384A
Publication Date:
January 17, 1986
Filing Date:
June 22, 1984
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD
International Classes:
F16H47/08; B60W10/02; B60W10/04; B60W10/10; B60W10/18; B60W10/184; F16H61/04; F16H61/10; F16H61/21; (IPC1-7): B60K41/04; F16H5/84; F16H47/08
Attorney, Agent or Firm:
Akashi Masatake