Automatic transmission transformer blocking
The transformer lockup in an automatic transmission (AT) is a mechanism that connects the input and output shafts of the transformer, creating a direct connection between the engine and transmission.
Transformer blocking functions:
* Improved efficiency: When the conversion is locked, energy losses caused by slippage between the torque converter and transmission are eliminated. This results in improved fuel economy.
* Improved Traction: Lockup creates a direct mechanical link, which improves power transfer and reduces transmission response time.
* Temperature Reduction: Locking reduces friction and therefore reduces transmission fluid temperature.
* Increased service life: Since lock-up eliminates slippage, it extends the service life of both the torque converter and the transmission.
Operating principle of transformer blocking:
The transformer locking is controlled by a solenoid valve or an electronic control unit (ECU). When conditions are suitable for locking (such as constant speed or part load), the ECU energizes the solenoid. The solenoid moves a piston that mechanically connects the input and output shafts of the transformer.
When transformer blocking is activated:
Transformer blocking is activated under the following conditions:
* Constant speed or smooth acceleration
* Partial load without large power transmission requirements
*Transmission fluid temperature is within acceptable range
Advantages of transformer blocking:
*Fuel saving
* Increased traction
* Reduced temperature
*Extended service life
*Smoother gear shifting