LOCK-UP CLUTCH CONTROL VALVE ASSEMBLY

摘要

The control valve assembly comprises a lock-up valve (801) to control engagement of a lock-up clutch (L) and a lock-up timing valve (802) to control the supply of a first fluid pressure to the lock-up valve. The first fluid pressure biases the lock-up valve to effect engagement of the lock-up clutch. The lock-up timing valve is moved to shut off the supply of the bias oil pressure to the lock-up valve when the second signal oil pressure rises above a first predetermined value to allow the lock-up valve to move to a first position thereof to release the engagement of the lock-up clutch. The lock-up valve is moved from the first position thereof to a second position thereof to effect reengagement of the lock-up clutch when the second signal oil pressure increases above a second predetermined value which is higher than the first predetermined value.