Title:
BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2020/162148
Kind Code:
A1
Abstract:
A belt-type continuously variable transmission (CVT) according to the present invention comprises a primary pulley (2), a secondary pulley (3), and a belt (4) wound around both pulleys, wherein a pulley pressing force is determined by a primary pressure (Ppri) supplied to the primary pulley (2) and a secondary pressure (Psec) supplied to the secondary pulley (3). In the belt-type continuously variable transmission (CVT), when a deviation of at least a prescribed value between a target pulley ratio set on the basis of a driving state and an actual pulley ratio calculated from the rotational speeds of the primary pulley (2) and the secondary pulley (3) has continued for a prescribed period of time, the secondary pressure (Psec) is increased, and a belt slip is determined to have occurred when the actual pulley ratio shifts to a high side as the secondary pressure (Psec) is increased.
Inventors:
AKEBONO HIROMICHI (JP)
SAWADA MASARU (JP)
RYU GEUNSEOK (JP)
KOYAMA AKIHIRO (JP)
SAWADA MASARU (JP)
RYU GEUNSEOK (JP)
KOYAMA AKIHIRO (JP)
Application Number:
PCT/JP2020/001687
Publication Date:
August 13, 2020
Filing Date:
January 20, 2020
Export Citation:
Assignee:
JATCO LTD (JP)
International Classes:
F16H61/12; F16H61/16
Foreign References:
| JP2014035046A | 2014-02-24 | |||
| JP2004301230A | 2004-10-28 | |||
| JP2004278663A | 2004-10-07 | |||
| JP2003106442A | 2003-04-09 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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