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Title:
TRANSMISSION OIL PRESSURE CONTROL DEVICE AND CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2018/101283
Kind Code:
A1
Abstract:
A variator (4) has: a primary pulley (42); a secondary pulley (43); and a pulley belt (44) that is hung and suspended on both the pulleys (42), (43), wherein the transmission gear ratio is controlled by changing a pulley width by means of transmission oil pressure that is adjusted on the basis of discharge pressure from an oil pump (70). In this engine vehicle, when the target transmission gear ratio of the variator (4) is determined during traveling, primary pressure (Pri) and secondary pressure (Psec) adjusted according to the target transmission gear ratio are respectively supplied to the primary pulley (42) and the secondary pulley (43). When the pulley rotational speed reaches to a level at which the transmission gear ratio of the variator (4) does not change even if the secondary pressure (Psec) is reduced, control for reducing the secondary pressure (Psec) is started.

Inventors:
RYU, Sungpil (550-1 Gasan-Dong Geumcheon-G, Seoul 3, 153803, KR)
LEE, Nakho (550-1 Gasan-Dong Geumcheon-G, Seoul 3, 153803, KR)
SHIN, Kwanyong (550-1 Gasan-Dong Geumcheon-G, Seoul 3, 153803, KR)
KIM, Eunhye (550-1 Gasan-Dong Geumcheon-G, Seoul 3, 153803, KR)
KIM, Kyungnam (550-1 Gasan-Dong Geumcheon-G, Seoul 3, 153803, KR)
KIM, Taeyoung (550-1 Gasan-Dong Geumcheon-G, Seoul 3, 153803, KR)
BYUN, Hyukjin (550-1 Gasan-Dong Geumcheon-G, Seoul 3, 153803, KR)
Application Number:
JP2017/042705
Publication Date:
June 07, 2018
Filing Date:
November 29, 2017
Export Citation:
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Assignee:
JATCO LTD (700-1, Imaizumi Fuji-sh, Shizuoka 85, 〒4178585, JP)
International Classes:
F16H61/02; F16H59/38
Domestic Patent References:
WO2015046188A12015-04-02
WO2016147727A12016-09-22
Foreign References:
JPH07317863A1995-12-08
JP2007211849A2007-08-23
JP2015021512A2015-02-02
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (Ekisaikai Bldg. 1-29, Akashi-cho, Chuo-k, Tokyo 44, 〒1040044, JP)
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