How Does a Car Transmission Work?

1 Answers
EmmettDella
07/28/25 4:27pm
The working principle of a car transmission is a mechanism that alters the speed and torque from the engine, either fixed or in steps, to change the transmission ratio between the output and input shafts. Transmissions are divided into two types: manual and automatic. A manual transmission mainly consists of gears and shafts, achieving speed and torque changes through different gear combinations. On the other hand, an automatic transmission (AT) is composed of a torque converter, planetary gears, and a hydraulic control system, achieving speed and torque changes via hydraulic transmission and gear combinations. The principles of the transmission are as follows: 1. Manual Transmission Working Principle: By shifting the gear lever, the driving gear on the intermediate shaft is switched, combining with gears of different sizes on the power output shaft to alter the torque and speed of the driving wheels. 2. Automatic Transmission: Utilizes planetary gear mechanisms to change speeds automatically based on the degree of throttle pedal input and vehicle speed changes, allowing the driver to control the speed simply by operating the accelerator pedal.
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