Title:
自動変速機
Document Type and Number:
Japanese Patent JP4404911
Kind Code:
B2
Abstract:
An automatic transmission includes a planetary gear mechanism, an engagement element group including a particular engagement element (33) having first and second pressure chambers (37,38), a pressure control valve (39) to regulate the fluid pressure for the particular engagement element, and a selector valve (41) arranged to connect the second pressure chamber (38) with the pressure control valve at a first valve position, and to disconnect the second pressure chamber from the pressure control valve at a second valve position. A shift control section is configured to command a shift operation from a first gear position, to a second gear position, by controlling the selector valve (41) to the second valve position and to supply the fluid pressure to the first pressure chamber, and to judge the selector valve to be in an abnormal state, in accordance with a parameter in the shift operation.
Inventors:
Takateru Kawaguchi
Mochiyama Shinya
Fumitaka Nagashima
Yoshihide Shinso
Mochiyama Shinya
Fumitaka Nagashima
Yoshihide Shinso
Application Number:
JP2007001500A
Publication Date:
January 27, 2010
Filing Date:
January 09, 2007
Export Citation:
Assignee:
JATCO Co., Ltd.
International Classes:
F16H61/12; F16H61/68; F16H61/684; F16H61/686; F16H59/42; F16H59/48; F16H59/68
Domestic Patent References:
| JP5346160A | ||||
| JP6109129A | ||||
| JP2304262A | ||||
| JP1172660A | ||||
| JP3113161A | ||||
| JP11280898A | ||||
| JP2000240785A | ||||
| JP6280978A |
Attorney, Agent or Firm:
Masaki Goto
Masahiro Fujii
Masaaki Iida
Masahiro Fujii
Masaaki Iida