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Title:
AUTOMATIC GEAR SHIFTER FOR AUTOMATIC TRANSMISSION FOR VEHICLE
Document Type and Number:
WIPO Patent Application WO/2014/171249
Kind Code:
A1
Abstract:
In order to provide an automatic gear shifter using a dog clutch and implementing engagement between a sleeve and a gear efficiently in a short time even when the sleeve is biased to the gear side, collides with the gear, and is repelled thereby, an automatic gear shifter comprises a rotating shaft, a clutch ring, a clutch hub, a sleeve, an axially moving unit, a stroke sensor, a dog clutch part, number-of-rotations sensors, and a control unit. The dog clutch part has a clutch front tooth and a clutch back tooth, and the control unit is provided with: a reverse determination unit for detecting that the sleeve has reversed and moved by the collision of the clutch front tooth therewith by an advance load; a re-movement start position detection unit for detecting a re-movement start position at which the sleeve starts again movement to the dog clutch part side; an entry load calculation unit for calculating a third load by which a high tooth of the sleeve can rush in between the clutch front tooth and a clutch front tooth adjacent thereto; and an engagement control unit for, after the high tooth has rushed in between the clutch front tooth and the clutch front tooth adjacent thereto, meshing a tooth groove of a spline with the clutch back tooth by an engagement load.

Inventors:
IWASAKI Yasuhisa (1 Asahi-machi 2-chome, Kariya-sh, Aichi 50, 〒4488650, JP)
MORI Kyosuke (1 Asahi-machi 2-chome, Kariya-sh, Aichi 50, 〒4488650, JP)
MISHIMA Keisuke (1 Asahi-machi 2-chome, Kariya-sh, Aichi 50, 〒4488650, JP)
YOSHIDA Yusuke (1 Asahi-machi 2-chome, Kariya-sh, Aichi 50, 〒4488650, JP)
KOMURA Masahiko (1 Asahi-machi 2-chome, Kariya-sh, Aichi 50, 〒4488650, JP)
Application Number:
JP2014/057281
Publication Date:
October 23, 2014
Filing Date:
March 18, 2014
Export Citation:
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Assignee:
AISIN SEIKI KABUSHIKI KAISHA (1 Asahi-machi 2-chome, Kariya-shi Aichi, 50, 〒4488650, JP)
International Classes:
F16H61/04; F16D11/00; F16D11/04; F16D48/06; F16H61/12
Foreign References:
JP2008232200A2008-10-02
JP2008202684A2008-09-04
JPH10299884A1998-11-13
Attorney, Agent or Firm:
KOBAYASHI Osamu (KAWASHIMA Bldg. 2nd Floor, 19-13 Kanayamacho 1-chome, Atsuta-ku, Nagoya-sh, Aichi 02, 〒4560002, JP)
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