Automatic transmission (automatic transmission) with all-wheel drive
An automatic transmission with all-wheel drive differs from a conventional automatic transmission in the presence of an all-wheel drive system that transmits engine power to all four wheels. This provides increased traction and control in a variety of road conditions.
Working principle:
1. Torque Converter: Like a conventional automatic transmission, an all-wheel drive automatic transmission has a torque converter that transfers power from the engine to the transmission.
2. Planetary gears: The torque converter is connected to planetary gears, which change the gear ratio and direction of torque.
3. Four-wheel drive mechanism: Inside the transmission is a four-wheel drive mechanism, usually a Torsen differential or multi-plate clutch. This mechanism transmits power to both the front and rear wheels.
4. Final Drives: Power from the transmission is transferred to the final drives, which reduce rotational speed and increase torque to the wheels.
5. Front and Rear Driveshafts: The final drives are connected to the front and rear driveshafts, which transmit power to the front and rear wheels respectively.
6. Differentials: The front and rear wheels have differentials that allow the wheels to rotate at different speeds when cornering.
Operating modes:
All-wheel drive automatic transmissions typically offer several operating modes that optimize traction and handling depending on road conditions:
*Front-wheel drive: Power is sent to the front wheels only, delivering fuel economy and handling on dry roads.
* Full-Time All-Wheel Drive: Power is sent to all four wheels for maximum traction on slippery roads.
* Automatic All-Wheel Drive: The system automatically switches between front-wheel drive and all-wheel drive depending on driving conditions.
Advantages:
* Increased Traction: All-wheel drive provides improved traction on slippery and off-road surfaces.
* Improved Handling: All four wheels receive power for improved cornering stability and control.
* Better cross-country ability: All-wheel drive allows you to overcome obstacles and drive off-road.
* Enhanced Safety: Increased traction and control contribute to improved safety in challenging road conditions.