Title:
LINE PRESSURE CONTROLLER FOR BELT DRIVE TYPE STEPLESS SPEED CHANGE GEAR
Document Type and Number:
Japanese Patent JPS5919754
Kind Code:
A
Abstract:
PURPOSE:To control the line pressure of a CVT without using any torque sensor, by detecting an input-side servo oil pressure (Pin) and an output-side servo oil ptessure (Pout) in place of the torque of a disk. CONSTITUTION:When the line pressure Pl(=Pout) is high, Pin and Pout are in a region above the line of Pin=Sr.Pout, and when the line pressure Pl is lowered, Pin and Pout are brought into a region coinciding with the line of Pin=Sr.Pout, so that a sliding is generated on a belt 11. In view of this, the line pressure Pl is maintained at a point Q2 on a Pin-Pout characteristic curve which is located at a position higher by a (constant) in the direction of the ordinate than the intersection Q1 of the Pin-Pout characteristic curve and the line of Pin=Sr.Pout. A slide starting point of the belt of the CVT is detected from the relationship between the input-side servo oil pressure Pin and the output-side servo oil pressure Pout, whereby the line pressure of the CVT can be controlled to a substantially minimum value in such a manner as not to generate any trouble in transmitting the torque, and torque sensors can be omitted.
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Inventors:
TOKORO SETSUO
SHIGEMATSU TAKASHI
WATANABE TOMOYUKI
SHIGEMATSU TAKASHI
WATANABE TOMOYUKI
Application Number:
JP12887882A
Publication Date:
February 01, 1984
Filing Date:
July 26, 1982
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD
International Classes:
F16H9/00; F16H61/00; F16H61/662; (IPC1-7): F16H9/18
Attorney, Agent or Firm:
Norikazu Kobe (2 outside)
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