System for controlling lock-up clutch

Details System for controlling lock-up clutch System for controlling lock-up clutch

1989-11-20

1990-10-30

Braun, Leslie A.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 357, F16H 6114, F16D 2514

Patent

active

049662635

ABSTRACT:
A system for controlling a lock-up clutch comprises a lock-up control valve including a spool and a plug in a spool bore. The spool is movable between a lock-up clutch engagement position and a lock-up clutch disengagement position. The plug is axially movably inserted at one end of the spool bore, and has a pressure acting area whose diameter is larger than the maximal diameter of the spool. This pressure acting area is subject to a pressure when the transmission establishes the first or reverse speed. Thus, in the event the transmission establishes the first or reverse speed, the spool is displaced to the lock-up clutch disengagement position by a force applied to the pressure acting area of the plug.

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"Nissan Cedric, Gloria, Introduction to Modifications of Y31 Type Series," Service Manual No. 626 (YA1-3,YB1-3), Nissan Motor Co., Ltd. Jun. 1989.

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