What is the principle of automatic transmission?
1 Answers
Automatic transmissions are divided into the following four types, with their working principles as follows: 1. Hydraulic automatic transmission: Achieves automatic shifting through hydraulic transmission and planetary gear combination. 2. Mechanical continuously variable transmission (CVT): Transmits engine power via a steel belt and the grooves of two pulleys, from the primary pulley to the secondary pulley, and then through the final drive to the driving wheels, achieving power transmission. 3. Electronically controlled mechanical automatic transmission: Expresses driver intentions through the accelerator pedal and selector (including gear range, shift pattern, cruise control, etc.) to the microcontroller. Numerous sensors constantly monitor the vehicle's status, and the computer controls the throttle opening, clutch engagement, and gear shifting according to the optimal program stored within (optimal shift pattern, optimal clutch engagement pattern, and adaptive engine throttle adjustment pattern) to achieve the best match, thereby obtaining excellent driving performance, smooth starting, and rapid shifting capability. 4. Dual-clutch automatic transmission: Arranges the gears on two input shafts connected to two clutches according to odd and even numbers, completing the shifting process through alternating clutch switching, achieving uninterrupted power shifting.