Title:
AUTOMATIC TRANSMISSION AND METHOD FOR DETERMINING LOCATION OF VIBRATION IN AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2020/183818
Kind Code:
A1
Abstract:
An automatic transmission according to the present invention comprises a torque converter, a variator, a sub-transmission mechanism, a third rotational speed sensor for detecting a rotational speed Nout on the output shaft side of the sub-transmission mechanism, and a controller for controlling the operation of the torque converter, variator, and sub-transmission mechanism. The controller comprises: a computing unit for computing, from the rotational speed Nout detected by the third rotational speed sensor, a vibration level Lfn in prescribed frequency regions F1, F2 in a vibration component of the rotational speed Nout; and a determining unit for determining a location at which vibration is occurring on the basis of the vibration level Lfn in the frequency regions F1, F2 as computed by the computing unit.
Inventors:
HASHIMOTO YASUYUKI (JP)
KOGUCHI TAKASHI (JP)
HISHIDA KENJI (JP)
KOMATSU MAKOTO (JP)
NODA HIDEYUKI (JP)
TAKARAFUJI HIROKI (JP)
MASUBUCHI SHOUGO (JP)
MIYAMOTO NORIKO (JP)
NAKANO HITOMI (JP)
SUWABE MASASHI (JP)
KOGUCHI TAKASHI (JP)
HISHIDA KENJI (JP)
KOMATSU MAKOTO (JP)
NODA HIDEYUKI (JP)
TAKARAFUJI HIROKI (JP)
MASUBUCHI SHOUGO (JP)
MIYAMOTO NORIKO (JP)
NAKANO HITOMI (JP)
SUWABE MASASHI (JP)
Application Number:
PCT/JP2019/047898
Publication Date:
September 17, 2020
Filing Date:
December 06, 2019
Export Citation:
Assignee:
JATCO LTD (JP)
NISSAN MOTOR (JP)
NISSAN MOTOR (JP)
International Classes:
F16H59/40; F16H59/68; F16H61/12; F16H61/662
Foreign References:
| JPH05172240A | 1993-07-09 | |||
| JP2017078474A | 2017-04-27 | |||
| JP2004044757A | 2004-02-12 | |||
| JPH10159872A | 1998-06-16 | |||
| JPH0843258A | 1996-02-16 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
Download PDF: