GEAR RATIO CONTROL DEVICE OF CONTINUOUSLY VARIABLE TRANSMISSION

Title:

GEAR RATIO CONTROL DEVICE OF CONTINUOUSLY VARIABLE TRANSMISSION

Document Type and Number:

Japanese Patent JP3334553

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To certainly and speedily carry out gear ratio control regardless of dispersion of dimensional tolerance, etc., from the manufacturing point by finding a second gear ratio command value by subtracting disturbance compensating output from a first gear ratio command value to be found in consideration of a target gear ratio and a speed change control constant.
SOLUTION: A target gear ratio of a continuously variable transmission 17 is set 610 in accordance with a driving condition, and a specified dynamic characteristic is computed 690 for each gear ratio of the continuously variable transmission 17. Additionally, first disturbance compensating output is computed by inputting a gear ratio command value from a gear ratio command value output means 720 to a low pass filter at a first disturbance compensating computation means 651, and second disturbance compensating output is computed by inputting a real gear ratio to a filter constituted by combining a reverse system of the low pass filter. Thereafter, a second gear ratio command value is found by computing 700 disturbance compensating output by subtracting the first and second disturbance compensating output and subtracting the disturbance compensating output from a first gear ratio command value in accordance with the driving condition, and a shift control valve 63 is controlled.

Inventors:

Hiroyuki Ashizawa
Kazutaka Adachi

Application Number:

JP9063297A

Publication Date:

October 15, 2002

Filing Date:

April 09, 1997

Export Citation:

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