Title:
BELT-TYPE STEPLESS TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2020/129511
Kind Code:
A1
Abstract:
In this belt-type stepless transmission: a balance propulsion ratio (Kbl) for balancing a gear ratio at a constant value is calculated on the basis of a balance propulsion ratio map; a secondary pressure compensation value (Pb2) is calculated on the basis of deviation between a target secondary pressure (Psec*) and an actual secondary pressure (Psec); a target gear ratio (Ip*) is calculated on the basis of a traveling state; a differential propulsion command value of a primary pulley is calculated on the basis of deviation between an actual gear ratio (Ip) and the target gear ratio (Ip*); and a target primary pressure (Ppri*) of the primary pulley (3) is calculated by adding together a value obtained by multiplying the target secondary pressure (Psec*) with the balance propulsion ratio (Kbl), a secondary compensation oil pressure (Pb2) obtained by multiplying the secondary pressure compensation value (Pprih) with the balance propulsion ratio (Kbl), and a feedback pressure (Pfb), which is the differential propulsion command value. As a result, control is performed such that the actual primary pressure (Psec) becomes the target primary pressure (Psec*).
Inventors:
OKAHARA KEN (JP)
Application Number:
PCT/JP2019/045072
Publication Date:
June 25, 2020
Filing Date:
November 18, 2019
Export Citation:
Assignee:
JATCO LTD (JP)
International Classes:
F16H59/70; F16H61/02; F16H61/662
Domestic Patent References:
| WO2018124022A1 | 2018-07-05 |
Foreign References:
| JP2014152895A | 2014-08-25 | |||
| JP2012127459A | 2012-07-05 | |||
| JP2007132420A | 2007-05-31 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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