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Title:
LINE PRESSURE CONTROLLER FOR AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2010/001665
Kind Code:
A1
Abstract:
A line pressure controller for automatic transmission enables the fuel economical efficiency of a vehicle to be improved by expanding a low-line pressure region of mapped data (hydraulic control characteristic) according to the temperature of hydraulic fluid.  In a storage unit (101), stored is mapped data of line pressure which is set in either a high-pressure region or a low-pressure region according to the engine load.  A determining unit (103) determines whether the mapped data is changed to expand the low-pressure region on the basis of the temperature of the hydraulic fluid detected by an ATF temperature sensor (18).  A state determining unit (104) determines whether the degree of throttle opening (TH) of the vehicle is totally closed or not or whether the line pressure is currently low or not.  If the low-pressure region is expanded and the degree of throttle opening (TH) is totally closed or the line pressure is currently low, a region changing unit (102) expands the low-pressure region of the mapped data stored in the storage unit (101), or otherwise inhibits such a change.

Inventors:
TAKAISHI, Toshihiko (4-1, Chuo 1-chome, Wako-sh, Saitama 93, 〒3510193, JP)
高石 敏彦 (〒93 埼玉県和光市中央一丁目4番1号 株式会社本田技術研究所内 Saitama, 〒3510193, JP)
YAMANAKA, Hideyuki (4-1, Chuo 1-chome, Wako-sh, Saitama 93, 〒3510193, JP)
Application Number:
JP2009/059185
Publication Date:
January 07, 2010
Filing Date:
May 19, 2009
Export Citation:
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Assignee:
HONDA MOTOR CO.,LTD. (1-1 MinamiAoyama 2-chome, Minato-ku Tokyo, 56, 〒1078556, JP)
本田技研工業株式会社 (〒56 東京都港区南青山二丁目1番1号 Tokyo, 〒1078556, JP)
TAKAISHI, Toshihiko (4-1, Chuo 1-chome, Wako-sh, Saitama 93, 〒3510193, JP)
高石 敏彦 (〒93 埼玉県和光市中央一丁目4番1号 株式会社本田技術研究所内 Saitama, 〒3510193, JP)
International Classes:
F16H61/02; F16H59/24; F16H59/72
Foreign References:
JP2002089679A
JPH0615900B2
JPH0615900B2
JP2002089680A
Other References:
See also references of EP 2299146A1
Attorney, Agent or Firm:
IIZUKA, Yoshihito et al. (Daini-Ohmiya Building, Third Floor 1-7, Hongo 4-chom, Bunkyo-ku Tokyo 33, 〒1130033, JP)
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