Title:
ONE WAY CLUTCH FRICTION PREVENTIVE DEVICE OF AUTOMATIC TRANSMISSION
Document Type and Number:
Japanese Patent JP2803438
Kind Code:
B2
Abstract:
PURPOSE: To operate friction elements by means of a manual valve even if a control valve to drain the operating pressure of the friction element corresponding to the friction of a one way clutch is stuck to a draining position.
CONSTITUTION: A valve 16, which is positioned at a lowering position with the fourth speed selected, by which a band brake B/B is engaged by fourth speed selection pressure P4, and a valve 18 can be positioned at a lowering position by turning off a solenoid C. With this constitution, the operating pressure of a clutch F/C is drained to prevent the friction of a one way clutch relating to the operating pressure. When the valve 18 is stuck to a lowering position, the operation of the clutch F/C becomes impossible, prohibiting the selection of the first speed through the third speed, but at this time, the second range is selected for a manual valve 14 to send pressure to a circuit 20. By this pressure, the clutch F/C is operated allowing the selection of the first speed through the third speed.
Inventors:
Tatsuo Wakahara
Sakakibara Ken
Akihiro Ueki
Sakakibara Ken
Akihiro Ueki
Application Number:
JP5073492A
Publication Date:
September 24, 1998
Filing Date:
March 09, 1992
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F16H61/02; F16H61/12; F16H61/21; (IPC1-7): F16H61/12
Domestic Patent References:
| JP2304255A |
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)