Combined forward pressure and torque converter control for autom

Details Combined forward pressure and torque converter control for autom Combined forward pressure and torque converter control for autom

1986-08-14

1989-07-04

Wright, Dirk

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74867, 192 358, 192 33, B60K 4122

Patent

active

048439207

ABSTRACT:
A control for an automatic transmission with a lock-up type torque converter, comprises a lock-up control valve, a forward clutch control valve, an electromagnetic valve, and a shuttle valve. The shuttle valve normally assumes a first position where a control signal regulated by the electromagnetic valve is supplied to the forward clutch control valve to render same to regulate forward pressure for activating a forward clutch. The shuttle valve shifts to a second position thereof when the transmission establishes forward speed ratios except the first speed ratio. In the second position of the shuttle valve, the control pressure regulated by the electromagnetic valve is supplied to the lock-up control valve to render same to effect slip control and lock-up control of the torque converter.

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Service Manual RN4F02A Type, RL4F02A Type Automatic transaxle, (A261C06) issued by Nissan Motor Company, Limited, dated 1984.

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