First, a gearbox is a gearbox that changes the gear ratio and direction of motion. Located between the clutch and the central drive. The main functions are: to change the driving force and driving speed of the vehicle (shift gear) under the condition of constant engine speed and torque; to enable the vehicle to travel in reverse (reverse direction); to stop the engine without turning off the engine (neutral gear). When the car is running, in order to adapt to different working conditions, the driving force and speed of the car need to be changed within a certain range, but the torque and speed range of the existing engine cannot meet this requirement, so a gearbox is installed. Its role is as follows:
(1) Change the transmission ratio between the engine and the wheels, so that the engine works under the best working conditions, expand the torque and speed transmitted by the engine to the driving wheels, and obtain different speeds;
(2) Make the car run backwards;
(3) Set neutral.
The gearbox is divided into manual and automatic. The manual transmission is mainly composed of gears and shafts, and the speed change and torque are produced through different gear combinations. The automatic transmission AT is composed of a hydraulic torque converter, a planetary gear, a hydraulic torque conversion system and a hydraulic control system, and realizes speed and torque conversion through hydraulic transmission and gear combination. Manual transmission, also known as manual transmission, uses a manual shift lever to change the meshing position of the gears in the transmission and change the transmission ratio, so as to achieve the purpose of shifting. When you depress the clutch, you move the gear lever. If the driver is skilled, a car with a manual transmission is faster and more fuel-efficient than a car with an automatic transmission when accelerating and overtaking.
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