Title:
Hydraulic pressure controller for automatic transmission
Document Type and Number:
Japanese Patent JP6201435
Kind Code:
B2
Abstract:
A hydraulic control circuit includes: a shift valve configured to be switched between a state of supplying oil pressure to a clearance adjusting chamber of an LR brake and a state of discharging the oil pressure from the clearance adjusting chamber of the LR brake; and a linear SV configured to control the oil pressure supplied to a pressing chamber of the LR brake. The hydraulic control circuit further includes a source pressure oil passage through which oil pressure equal to the oil pressure supplied from the shift valve to the clearance adjusting chamber is supplied to a source pressure port a of the linear SV. By discharging the oil pressure in the clearance adjusting chamber at the time of opening malfunction of the linear SV, the oil pressure in the pressing chamber is also discharged through a drain port of the shift valve.
Inventors:
Tsujiro Saji
Shinya Kamada
Shotaro Nagai
Nakayama Yasunari
Yu Nakagishi
Yasuo Shigenaka
Kobayashi
Shinya Kamada
Shotaro Nagai
Nakayama Yasunari
Yu Nakagishi
Yasuo Shigenaka
Kobayashi
Application Number:
JP2013117056A
Publication Date:
September 27, 2017
Filing Date:
June 03, 2013
Export Citation:
Assignee:
Mazda Corporation Inc
International Classes:
F16H61/00
Domestic Patent References:
| JP9112690A | ||||
| JP2009204067A | ||||
| JP2004263744A | ||||
| JP2009299817A | ||||
| JP2007303616A | ||||
| JP2005265063A |
Attorney, Agent or Firm:
Takuji Yamada
Mitsuo Tanaka
Mikio Tanaka
Fukuoka Masaaki
Mitsuo Tanaka
Mikio Tanaka
Fukuoka Masaaki