Title:
HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION FOR VEHICLE
Document Type and Number:
Japanese Patent JP3849609
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a hydraulic control device for an automatic transmission for a vehicle capable of enabling favorable travel when a relatively large driving force is necessary as a fail-safe means is functioning.
SOLUTION: This device includes a change-over valve 96 changed from a first position into a second position in accordance with change of change-over positions in a manual valve 82 at the time of failure when a first solenoid valve 84 to a fifth solenoid valve 92 stop their action, so that a hydraulic friction engagement device is actuated by a combination to set up a fifth speed at the first position, and by a combination to set up a third speed at the second position. When failure is generated during travel, the fifth speed is first set up to enable continued travel. As the change-over position of the manual valve 82 is changed by operation by a driver when the vehicle is temporarily stopped, the third speed is set up by the change-over valve 96, thereby driving force necessary for low-speed travel or restarting is secured.
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Inventors:
Hideki Miyata
Yasuo Hojo
Yoshihiro Iijima
Naoyuki Fukaya
Haruki Yamamoto
Fuminori Suzuki
Yasuo Hojo
Yoshihiro Iijima
Naoyuki Fukaya
Haruki Yamamoto
Fuminori Suzuki
Application Number:
JP2002232583A
Publication Date:
November 22, 2006
Filing Date:
August 09, 2002
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F16H61/02; F16H61/12; F16H59/08; F16H59/68; F16H61/686; (IPC1-7): F16H61/12; //F16H59:08; F16H59:68; F16H63:12
Domestic Patent References:
| JP2000240776A | ||||
| JP2001208190A | ||||
| JP2001248718A | ||||
| JP2003106443A | ||||
| JP2000346193A | ||||
| JP9303545A | ||||
| JP2000170899A |
Attorney, Agent or Firm:
Haruyuki Ikeda