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What is the working principle of a transmission?

2 Answers

SerenityMarie

08/28/25 8:01am

The working principle of a transmission is as follows: 1. A manual transmission mainly consists of gears and shafts, achieving speed and torque variation through different gear combinations. 2. An automatic transmission (AT) is composed of a torque converter, planetary gears, and a hydraulic control system, achieving speed and torque variation through hydraulic transmission and gear combinations. The main functions of a transmission are as follows: 1. Changing the transmission ratio to expand the range of torque and speed variation of the driving wheels, adapting to frequently changing driving conditions while allowing the engine to operate under favorable conditions (higher power and lower fuel consumption). 2. Enabling the vehicle to reverse while maintaining the same engine rotation direction. 3. Utilizing neutral gear to interrupt power transmission, allowing the engine to start, shift gears, and facilitating gear shifting or power output. 4. The transmission consists of a gear transmission mechanism and a control mechanism, and a power take-off can be added when necessary.

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MaximusLynn

09/10/25 6:10am

The working principle of a transmission is quite interesting. As someone who enjoys studying cars, let me explain using a manual transmission as an example. Simply put, it adjusts vehicle speed by changing gear ratios. When the engine starts, it rotates the input shaft. Pressing the clutch pedal disconnects the power transmission, allowing you to select different gears using the gear lever. For instance, lower gears have larger ratios suitable for climbing hills at low speeds, while higher gears have smaller ratios ideal for high-speed driving. Once the gears engage, the output shaft drives the wheels. This entire process ensures the engine maintains optimal RPM—neither too high nor too low—protecting the engine while improving fuel efficiency. Remember, timely gear shifting is crucial to avoid prolonged low-gear usage that could damage the car. New drivers should practice these operations gradually to prevent accidents.

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