Title:
CONTROL DEVICE OF CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
Japanese Patent JPS60101350
Kind Code:
A
Abstract:
PURPOSE:To improve engine brake performance at the time of manual operation by fixing a torque transmission ratio variable control characteristic to a line at the time of engine total load during manual operation in a stepless speed change gear in which the torque transmission ratio is controlled to be variable according to a running condition. CONSTITUTION:A belt type continuously variable transmission mechanism 6 has a torque transmission ratio change fluid actuator 10 comprising cylinders 7, 8 mounted on input and output pulleys 1, 3. The discharged oil of a fluid pump 9 is supplied through pressure adjust valves 11, 13 to one cylinder 7. The pressure adjust valve 11 is controlled according to a load signal fluid PT from a throttle opening sensor valve 12, and the pressure adjust valve 13 is controlled according to a signal fluid from a ratio control valve 14. The ratio control valve 14 is provided with means for changing a speed range, which is adapted to set a signal fluid changed according to engine load at a value corresponding to engine total load in response to manual operation.
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Inventors:
NAGAMATSU HIROAKI
EBIMOTO TAKASHIGE
EBIMOTO TAKASHIGE
Application Number:
JP20932683A
Publication Date:
June 05, 1985
Filing Date:
November 07, 1983
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
F16H61/662; (IPC1-7): F16H9/18; F16H11/06
Attorney, Agent or Firm:
Hiroshi Maeda