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How Many Types of Transmissions Are There for Small Cars?

1 Answers

LeMadelyn

07/30/25 12:06am

There are 5 types of transmissions for small cars: Manual Transmission (MT), Continuously Variable Transmission (CVT), Hydraulic Torque Converter Automatic Transmission (AT), Dual-Clutch Transmission (DCT), and Automated Manual Transmission (AMT). Manual Transmission (MT): Manual Transmission (MT), also known as mechanical transmission, is commonly found in passenger cars with four or five gears and usually equipped with synchronizers, making gear shifting convenient and reducing noise. Continuously Variable Transmission (CVT): CVT (Continuously Variable Transmission) has a history of over 100 years. Unlike geared transmissions, CVT provides a continuous range of gear ratios, improving fuel efficiency, power performance, and driving smoothness while reducing emissions and costs. However, it has lower efficiency and non-fixed transmission ratios. Hydraulic Automatic Transmission (AT): AT (Automatic Transmission) consists of a torque converter, planetary gears, and a hydraulic control system. It features smooth gear shifts (short shift time, minimal impact), stable starts, strong adaptability to torque changes, mature manufacturing processes, and relatively low production costs. Widely used in passenger cars, buses, heavy-duty vehicles, and commercial vehicles, AT is currently the mainstream automatic transmission product. Automated Manual Transmission (AMT): AMT (Automated Manual Transmission) is modified from a mechanical transmission, primarily altering the manual gear-shifting mechanism. It retains the overall transmission structure but adds a computer-controlled automatic shifting system. AMT's core technology relies on computer control, with electronic technology and quality directly affecting its performance. It offers high transmission efficiency, low cost, and good fuel economy but may have noticeable shift jerks. Dual-Clutch Transmission (DCT): DCT (Dual-Clutch Transmission) comes in wet and dry types. Wet DCT uses more transmission fluid, has a larger size, and can handle higher torque. Dry DCT uses less fluid, is more compact, and offers higher efficiency, making it suitable for small cars, though it has lower torque capacity compared to wet DCT.

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