Title:
CONTROL DEVICE AND CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2020/110658
Kind Code:
A1
Abstract:
This control device for a belt-type continuously variable transmission (CVT) has: a drum rotation sensor (96) that detects the rotation of a drum member (33) of a forward/reverse switching mechanism (3); a primary rotation sensor (90) that detects the rotation of a primary rotary shaft (40); and a turbine rotation estimation unit (80) that calculates the turbine estimation value (NTBN') of a turbine rotary shaft (21) on the basis of the detection value of the drum rotation sensor (96) and the primary rotation sensor (90). When the detection value of the drum rotation sensor (96) and the detection value of the primary rotation sensor (90) are unclear, the turbine rotation estimation unit (80) estimates the rotation speed of the unclear detection value by using at least two among the traveling/stop state, the fastened/released states of a forward clutch (31) and a reverse brake (32), and the transmission ratio of a variator (4), and calculates the turbine rotation estimation value (NTBN') by using the estimated rotation estimation value and the detection value of the other sensor.
Inventors:
MATSUI JUNKI (JP)
Application Number:
PCT/JP2019/043813
Publication Date:
June 04, 2020
Filing Date:
November 08, 2019
Export Citation:
Assignee:
JATCO LTD (JP)
NISSAN MOTOR (JP)
NISSAN MOTOR (JP)
International Classes:
F16H59/44; F16H59/70; F16H61/02; F16H61/12; F16H61/662
Foreign References:
| JP2016089894A | 2016-05-23 | |||
| JP2005172010A | 2005-06-30 | |||
| JP2002354604A | 2002-12-06 | |||
| JPH092106A | 1997-01-07 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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