Title:
TRANSMISSION HYDRAULIC CONTROL DEVICE OF CONTINUOUSLY VARIABLE TRANSMISSION AND TRANSMISSION HYDRAULIC CONTROL METHOD OF CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2020/189470
Kind Code:
A1
Abstract:
A transmission controller (80) of a transmission hydraulic control device in a belt-type continuously variable transmission CVT comprises: a target hydraulic pressure setting unit (801) that sets a target primary pressure and a target secondary pressure; pulley command pressure signal generating units (802, 803) that generate, on the basis of the target primary pressure and the target secondary pressure, a primary pulley command pressure signal and a secondary pulley command pressure signal by control using a feedback compensator referring to an actual hydraulic pressure; a characteristics variation factor determining unit (804) that determines a characteristics variation factor why a change in characteristics of control targets including a variator (4) makes an attenuation characteristic of the feedback compensator unsuitable; and a switching execution unit (805) that switches the attenuation characteristic of the feedback compensator in conformity with the characteristics of the control targets when the characteristics variation factor is determined.
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Inventors:
HAYAKAWA AKI (JP)
YAMAMURA YOSHINORI (JP)
ICHIKAWA HIROAKI (JP)
YAMAMURA YOSHINORI (JP)
ICHIKAWA HIROAKI (JP)
Application Number:
PCT/JP2020/010694
Publication Date:
September 24, 2020
Filing Date:
March 12, 2020
Export Citation:
Assignee:
JATCO LTD (JP)
International Classes:
F16H59/68; F16H61/12; F16H63/06
Domestic Patent References:
| WO2016152469A1 | 2016-09-29 | |||
| WO2017159269A1 | 2017-09-21 | |||
| WO2016151661A1 | 2016-09-29 |
Foreign References:
| JP2000337488A | 2000-12-05 | |||
| JP2000018378A | 2000-01-18 | |||
| JPH0579550A | 1993-03-30 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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