In cars, to transfer power from the engine to the differential and wheels, they need a gearbox to adjust the amount of power and speed depending on the road conditions and the driver's request. that these changes happen by changing the ratio of torque output from the engine. In manual transmission systems, the driver adjusts the torque manually using the gear lever, but in automatic transmissions AT), the driver starts moving just once by placing the gear lever in Drive mode, and the gearbox selects the right torque according to the conditions and the driver's wishes.
Generally, power transmission systems play an important role in improving the efficiency and increasing the efficiency of vehicles, therefore, researchers are trying to design systems that have the most efficiency with the least fuel consumption. The automatic gearbox does not have the problems that the manual type has, such as shock when changing gear, sudden change in engine speed, complexity, high cost of construction and maintenance, and the use of this gearbox also reduces fuel consumption and increases the life of the engine.
What is the role of gearbox in the car?
The gearbox provides the driving force for the movement of the vehicle. The gearbox does this by adjusting the required torque and speed. Delivering the driving force from the engine to the wheels to move the car is also done by the power transmission system.
History of automatic gearbox
General Motors and REO (REO Motor Car Company was an American company that produced cars and trucks from 1905 to 1975) both introduced semi-automatic transmissions in 1934. These transmissions were less challenging than a traditional manual transmission, but still required the use of a clutch to shift gears. The GM transmission was the first transmission of its kind that used a planetary transmission with hydraulic control and allowed the gears to shift depending on the vehicle's speed. Planetary transmissions are one of the most important developments on the way to The automatic transmission was modern. Although General Motors was the first company to use this version with hydraulic controls, the technology actually dates back to a 1900 invention by Wilson Pilcher. This innovation included four front gears in the train that could be changed with a lever.