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Title:
CONTROL DEVICE OF TRANSMISSION
Document Type and Number:
Japanese Patent JP2019120266
Kind Code:
A
Abstract:
To provide a control device of a transmission capable of improving followability in shift change control.SOLUTION: A control pressure according to a deviation E between a target change gear ratio and an actual change gear ratio of CVT, is determined. A hydraulic pressure of the control pressure is supplied to a movable sheave of a primary pulley and a movable sheave of a secondary pulley, so that the actual change gear ratio can approach the target of the change gear ratio. A dischargeable pressure of an oil pump for making a hydraulic circuit generate an original pressure, is estimated, and an upper limit of the control pressure is limited to the dischargeable pressure. Thus a guard control pressure as a control pressure after limitation by the dischargeable pressure is limited to a smaller value in accordance with decrease of the dischargeable pressure. A wind-up amount obtained by subtracting the guard control pressure from the control pressure is increased, and an I control value calculated by integration operation of the deviation between a multiplication value obtained by multiplying the deviation by an I gain Ki and an amplification value of the wind-up amount output by an amplification portion 129, is decreased, in accordance with increase of the difference between the control pressure and the guard control pressure.SELECTED DRAWING: Figure 3

Inventors:
YAMAMOTO JUNICHI
HIRAO TOMOYUKI
IIHARA KENJI
Application Number:
JP2017253363A
Publication Date:
July 22, 2019
Filing Date:
December 28, 2017
Export Citation:
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Assignee:
DAIHATSU MOTOR CO LTD
International Classes:
F16H61/02; F16H59/70; F16H61/04; F16H61/662
Attorney, Agent or Firm:
皆川 祐一