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Patent Searching and Data


Title:
HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2010/038401
Kind Code:
A1
Abstract:
A first clutch applying relay valve (21) is, in a first to third forward stages, set to a low-speed stage position for outputting a first preliminary hydraulic pressure for a hydraulic servo (41) of a clutch (C-1) and is, in fourth to sixth forward stages, set to a high-speed stage position for outputting a second preliminary hydraulic pressure for a hydraulic servo (42) of a clutch (C-2).  In a normal condition, a second clutch applying relay valve (22) supplies control hydraulic pressures from linear solenoid valves (SLC1, SLC2, SLC3) to hydraulic servos (41, 42, 43) of clutches (C-1, C-2, C-3).  In an ALL-OFF failure, the second clutch applying relay valve (22) supplies the first preliminary hydraulic pressure or the second preliminary hydraulic pressure to the hydraulic servos (41, 42) and supplies a line pressure (PL) to the hydraulic servo (43).  The configuration allows the linear solenoid valves (SLC1, SLC2, SLC3) to be of normally closed type and allows a low-speed stage or a high-speed stage to be achieved even when the solenoid valves are in the ALL-OFF condition.

Inventors:
SHIMIZU, Tetsuya (10, Takane, Fujii-cho, Anjo-sh, Aichi 92, 〒4441192, JP)
清水哲也 (〒92 愛知県安城市藤井町高根10番地 アイシン・エィ・ダブリュ株式会社内 Aichi, 〒4441192, JP)
TSUCHIDA, Kenichi (10, Takane, Fujii-cho, Anjo-sh, Aichi 92, 〒4441192, JP)
土田建一 (〒92 愛知県安城市藤井町高根10番地 アイシン・エィ・ダブリュ株式会社内 Aichi, 〒4441192, JP)
Application Number:
JP2009/004898
Publication Date:
April 08, 2010
Filing Date:
September 25, 2009
Export Citation:
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Assignee:
AISIN AW CO., LTD. (10Takane, Fujii-cho Anjo-sh, Aichi 92, 〒4441192, JP)
アイシン・エィ・ダブリュ株式会社 (〒92 愛知県安城市藤井町高根10番地 Aichi, 〒4441192, JP)
SHIMIZU, Tetsuya (10, Takane, Fujii-cho, Anjo-sh, Aichi 92, 〒4441192, JP)
清水哲也 (〒92 愛知県安城市藤井町高根10番地 アイシン・エィ・ダブリュ株式会社内 Aichi, 〒4441192, JP)
TSUCHIDA, Kenichi (10, Takane, Fujii-cho, Anjo-sh, Aichi 92, 〒4441192, JP)
International Classes:
F16H61/12; F16H61/00; F16H59/70
Foreign References:
JP2008025773A
JP2007177932A
JP2007177932A
Other References:
See also references of EP 2256376A1
Attorney, Agent or Firm:
CHIKASHIMA, Kazuo (2FOmodaka Building, 9-7 Shibaura 1-chome, Minato-k, Tokyo 23, 〒1050023, JP)
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