Lock-up control system for lock-up type automatic transmission

摘要

A look-up control system for a lock-up type automatic transmission wherein a torque converter locks up in a pattern when the engine temperature is higher than a predetermined temperature value, but is prevented from locking up in the pattern when the engine temperature is lower than the predetermined temperature value. During engine operation when the engine temperature is lower than the predetermined temperature value, the torque converter is allowed to lock up in a second pattern or prevented from locking up.