What Types of Transmissions Are There?
2 Answers
There are many types of car transmissions, with the most common including AMT automatic transmissions, AT automatic transmissions, CVT continuously variable transmissions, and DCT dual-clutch transmissions. Here is some relevant information about transmissions: 1. AMT Automatic Transmission: The AMT transmission is a compromise between MT and AT transmissions. It has relatively low production costs and is more convenient to operate. However, improper operation can cause strong jerking sensations, affecting comfort. 2. AT Automatic Transmission: The AT automatic transmission consists of a torque converter, planetary gears, and a hydraulic control system, achieving variable torque through hydraulic transmission and gear combinations. 3. CVT Continuously Variable Transmission: Compared to AT automatic transmissions, the CVT eliminates the complex and bulky gear combination transmission. Instead, it uses two sets of pulleys. Gear shifting is achieved by changing the contact radius of the belt between the driving and driven pulleys. 4. DCT Dual-Clutch Transmission: The DCT dual-clutch transmission uses two sets of clutches, which alternate to achieve seamless gear shifting. DCT can be divided into dry dual-clutch and wet dual-clutch types.
I've been driving manual transmissions for ten years, and gearboxes basically fall into three categories. The most common is the manual transmission (MT), where you press the clutch and shift gears yourself—like my old Jetta. It's simple in structure and cheap to repair, but your left leg gets tired in traffic jams. Automatic transmissions (AT) are the most popular now; no clutch pedal needed, as the computer controls hydraulic pressure for gear shifts, making it very hassle-free. Many Japanese cars use this. Then there's the CVT (continuously variable transmission), which offers smooth driving without jerks, like the Nissan Sylphy's belt-driven system. Dual-clutch transmissions (DCT) shift quickly and save fuel—Volkswagen calls theirs DSG, with both dry and wet types (the wet type has better cooling). Hybrids use E-CVT, which is actually a collaboration between electric motors and gear sets—Toyota hybrids all follow this approach. EVs are simpler, with single-speed transmissions delivering torque directly. Choosing a transmission depends on your needs: go for AT if you want ease, or manual if you prefer control.
