Methods for locking an automatic transmission torque converter
1. Mechanical interlock
* Install a locking device on the torque converter. This is a mechanical device that physically locks the torque converter shaft, preventing it from slipping.
* Install a mechanical lock switch. This switch allows you to manually lock and unlock the torque converter.
2. Electronic lock
* Use an electronic transmission control module (TCM). The TCM can control the electronic lockup solenoid, which mechanically locks up the torque converter.
* Install an external electronic blocking control unit (EBC). This unit can control the lockup solenoid and optimize lockup based on driving conditions.
3. Hydraulic locking
* Use a hydraulic accumulator. This device stores hydraulic pressure, which is used to activate a plunger that locks the torque converter.
*Use centrifugal forces. When the torque converter rotates at high speeds, centrifugal forces automatically lock it up.
4. Electrohydraulic locking
*Use electro-hydraulic lock-up solenoid. This solenoid controls a hydraulic valve that activates or deactivates the lockout.
*Use electronic TCM and lockup solenoid. The TCM controls the solenoid to provide optimal locking based on driving conditions.
Note:
*Torque converter lockup typically occurs at certain speeds and loads.
* Some automatic transmissions have a partial lock-up feature that allows the torque converter to slip at low speeds.
* Torque converter lock-up provides improved efficiency and fuel economy.