Title:
BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2020/059339
Kind Code:
A1
Abstract:
This belt-type continuously variable transmission is provided with a primary pulley (2), a secondary pulley (3), and a belt wound around the two pulleys (2, 3), and pulley-pushing force is determined by primary pressure supplied to the primary pulley (2) and secondary pressure supplied to the secondary pulley (3). The belt-type continuously variable transmission is also provided with a gearshift control means that, when performing Low return gearshifting in which the transmission ratio of the belt-type continuously variable transmission is changed towards the lowest gear during vehicle deceleration, calculates a first primary pressure actual measured lower limit value at which the belt begins to actually slip on the basis of the vehicle deceleration rate and the transmission ratio, and sets a lower limit value of a primary pressure target value in the Low return gearshifting to the primary pressure actual measured lower limit value. Upon detecting a tendency for the vehicle wheels to lock, the gearshift control means sets the primary pressure actual measured lower limit value to be higher than when a tendency to lock has not been detected.
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Inventors:
AKEBONO HIROMICHI (JP)
IMAJI SHOHEI (JP)
TAKAHASHI SEIICHIROU (JP)
HARA KATSUYUKI (JP)
IMAJI SHOHEI (JP)
TAKAHASHI SEIICHIROU (JP)
HARA KATSUYUKI (JP)
Application Number:
PCT/JP2019/030853
Publication Date:
March 26, 2020
Filing Date:
August 06, 2019
Export Citation:
Assignee:
JATCO LTD (JP)
NISSAN MOTOR (JP)
NISSAN MOTOR (JP)
International Classes:
F16H61/02; F16H59/48; F16H59/54; F16H59/70; F16H61/662
Domestic Patent References:
| WO2013145974A1 | 2013-10-03 |
Foreign References:
| JP2001330145A | 2001-11-30 | |||
| JP2002533628A | 2002-10-08 | |||
| JP2002327835A | 2002-11-15 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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