Mercedes-Benz automatic transmission device
1. Torque converter
*Transmits torque from the engine to the gearbox.
* Consists of pump, turbine and stator.
* The pump creates oil pressure, which drives the turbine.
* The turbine is coupled to the output shaft, transmitting torque.
* The stator is located between the pump and the turbine, directing the flow of oil and increasing the gear ratio.
2. Planetary gears
* A series of gears that provide different gear ratios.
* Consists of a sun gear, several planetary gears and a carrier gear.
* Gears are activated using brake bands and clutches.
3. Brake bands
* Clamp the planetary gears or carriers to keep them from rotating.
* Operated by hydraulic pressure.
4. Couplings
* Connects various elements of planetary gears.
* Operated by hydraulic pressure.
5. Hydraulic control unit
* Contains solenoids and valves that direct hydraulic pressure to brake bands and clutches.
* Controls gear shifting, torque converter lock-up and other functions.
6. Sensors
*Monitor various aspects of gearbox operation:
* Input and output shaft rotation speed
*Oil temperature
*Oil pressure
* Transmits data to the hydraulic control unit.
7. Electrical control unit (ECU)
*Located outside the gearbox.
* Controls the hydraulic control unit based on input data from sensors.
* Optimizes transmission performance for smooth shifting and maximum efficiency.
8. Oil pan
* Bottom of the transmission where the oil collects and cools.
* Contains an oil filter to remove impurities.
9. Oil
* Specially developed oil for Mercedes-Benz automatic transmissions.
* Provides lubrication, cooling and hydraulic pressure.