Communication between automatic transmission, clutch and engine
In a car with an automatic transmission (AT), the clutch works differently than in a car with a manual transmission (MT).
In cars with manual transmission:
* A clutch is a mechanical device that allows the driver to disengage and connect the engine to the transmission.
* The clutch is used when changing gears, starting and stopping.
* When the driver presses the clutch pedal, it disengages from the engine flywheel, interrupting power transmission.
In cars with automatic transmission:
* Automatic transmission automates the gear shifting process, eliminating the need for a clutch in the traditional sense.
* Most automatic transmissions use a torque converter instead of a clutch.
* A torque converter is a hydraulic device that connects the engine to the transmission. It acts as a clutch, allowing smooth connection and disconnection between the engine and transmission.
* The torque converter is filled with fluid that transfers power from the engine to the transmission.
How a torque converter replaces a clutch:
* When the engine is idling, the torque converter slides, allowing the vehicle to stand still even if the transmission is in drive.
* When the driver presses the gas pedal, the torque converter locks, connecting the engine to the transmission and sending power to the wheels.
* When shifting gears, the torque converter regulates power delivery for smooth shifting.
Advantages of an automatic transmission:
* Eliminates the need for clutch control.
* Simplified driving process.
* Smooth gear shifting.
* Improved driving comfort.