Title:
CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION FOR VEHICLE
Document Type and Number:
Japanese Patent JPS63184530
Kind Code:
A
Abstract:
PURPOSE:To make a running state accurately graspable as well as to aim at the promotion of miniaturization and low accuracy of a device, by altering a control method for speed ratio based on whether the running state of a vehicle is in a low powered range or not, and controlling the speed ratio based on engine load at the low powered range. CONSTITUTION:A change gear ratio of the vehicle continuously variable transmission connected to an engine is determined based on the running state of a vehicle, thereby controlling the change gear ratio (step SD). In this cas, as the running state of the vehicle, first, at least car speed, required engine power capacity and engine load are detected (step SA). Next, on the basis of the car speed and the engine power capacity, whether the running state of the vehicle is in an output range or not is judged (step SB). In succession, when the vehicle running is in a low powered state, the change gear ratio is determined based on the car speed and the engine load (step SC). On the other hand, when the vehicle running state is not in the low powered range, the change gear ratio is determined based on the car speed and the required engine power capacity (step SE).
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Inventors:
ISOBE TOSHIAKI
HATTORI KOJI
HATTORI KOJI
Application Number:
JP1556687A
Publication Date:
July 30, 1988
Filing Date:
January 26, 1987
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
B60W10/04; B60W10/10; B60W10/101; F16H59/06; F16H59/10; F16H61/08; (IPC1-7): B60K41/14; F16H11/06
Attorney, Agent or Firm:
Adachi Tsutomu