Why does BYD's DMi not have a transmission?
1 Answers
BYD's DMi technology is an improvement based on Honda's i-MMD technology as pure electric vehicle technology continues to mature, relying more on batteries and electric motors, thus eliminating the transmission. Below is the relevant introduction about BYD: 1. Engine direct drive is basically only used during high-speed cruising, where the requirements for engine power and torque are not too high. In other conditions, the vehicle is driven by the electric motor, with the engine generating electricity. 2. If BYD requires sudden acceleration at high speeds, the electric motor will assist in driving to meet the demand, but the efficiency of the electric motor decreases at high speeds, making rapid acceleration with DMi technology likely more challenging. 3. BYD's technology clearly prioritizes economy, making it more suitable for urban use, with occasional high-speed and long-distance travel, but it does not meet the demands of aggressive driving. For conditions requiring prolonged high-power driving, such as extended high-speed driving, DMi technology is not suitable. 4. Essentially, vehicles with DMi technology will only enter engine direct drive mode when speeds exceed 80 km/h. According to highway and road design standards, speeds above 80 km/h are unlikely to encounter significant slopes, and maintaining speeds above 80 km/h while climbing steep slopes is impossible. Therefore, this technology is well-suited for normal driving needs.
