Electronic automatic transmission lock
Electronic Transmission Lock is a feature that locks the transmission’s torque converter in higher gears, allowing a direct connection between the engine and the drive wheels.
Working principle:
* In higher gears, the torque converter has a much lower slip ratio, making it less efficient.
* The electronic transmission control (TCM) recognizes when this occurs and activates a solenoid valve that blocks fluid flow to the torque converter.
* This creates a direct connection between the engine and transmission output shaft, eliminating slippage and improving efficiency.
Advantages of electronic automatic transmission lock:
*Improved Fuel Economy: By eliminating torque converter slippage, electronic lock-up can significantly improve fuel economy.
* Enhanced Performance: Locking the automatic transmission provides faster, more direct acceleration as engine power is directly transferred to the wheels.
*Smoother Gear Shifting: Locking also helps smooth out gear shifts because it eliminates slippage that can cause jerking and vibration.
* Reduces Transmission Temperature: By eliminating torque converter slippage, electronic lock-up reduces transmission fluid heat, which extends transmission life.
When the electronic automatic transmission lock is activated:
Electronic locking is usually activated in higher gears such as 4th, 5th and 6th, depending on the vehicle model. It may also be enabled under certain conditions, such as:
* Acceleration
* Maintain constant speed on highway
* Towing or transporting heavy loads
Features and Limitations:
Electronic transmission lock is a standard feature in many modern cars with an automatic transmission. However, availability may vary depending on the model and year of the vehicle.
Some limitations of electronic locking include:
* It is not active in lower gears such as 1st and 2nd.
* It may be disabled under certain conditions such as wheel spin or low transmission fluid.
* It may not be as effective when towing heavy loads or driving on inclines.