Title:
Hydraulic pressure controller for automatic transmission
Document Type and Number:
Japanese Patent JP5980184
Kind Code:
B2
Abstract:
Oil pressure controller for an automatic transmission produces a pre-charge shelf pressure supplied to a starter clutch by rapidly decreasing a command hydraulic pressure to the starter clutch after temporarily rapidly increasing the command hydraulic pressure, also produces a capacity adjustment pressure (Pb1 or Pb2) of the starter clutch by gradually increasing the hydraulic pressure from a decrease point of the pre-charge shelf pressure (Pa), when a selecting operation is made from N-range to D-range. By changing capacity adjustment pressure (Pb1 or Pb2) according to brake-operating/nonoperating state, capacity adjustment pressure (Pb1) in the brake-nonoperating state is set to be higher than capacity adjustment pressure (Pb2) in the brake-operating state by an offset hydraulic pressure amount. With this, when the selecting operation is made from N-range to D-range, in the brake-operating state, selection shock of the starter clutch can be reduced. In the brake-nonoperating state, good vehicle startability can be achieved.
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Inventors:
Koichi Tsuji
Kenji Hattori
Kenji Hattori
Application Number:
JP2013190416A
Publication Date:
August 31, 2016
Filing Date:
September 13, 2013
Export Citation:
Assignee:
JATCO Co., Ltd.
Nissan Motor Co., Ltd
Nissan Motor Co., Ltd
International Classes:
F16H61/04; F16D48/02
Domestic Patent References:
| JP328571A | ||||
| JP510431A |
Foreign References:
| WO2007049680A1 |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Tsuyoshi Hashimoto
Tomioka Kiyoshi
Tsuyoshi Hashimoto