1. Engine direct drive is basically only used in the high-speed cruise phase. At this time, the requirements for engine power and torque will not be too high. Under other working conditions, the motor drives and the engine generates electricity.
2. If BYD's high speed needs rapid acceleration, the coordinated drive of the motor can also meet the demand. However, the efficiency of the motor will decrease at high speed, and it will be very troublesome for dmi technology to accelerate at high speed.
BYD's technology is obviously more economical and more suitable for urban areas. If necessary, you can run at high speed and long distance, but you can't meet the fierce driving demand. If it is a long-term driving condition that requires high power, such as long-term ultra-high-speed driving, dmi technology is not competent.
4. Cars with dmi technology will enter the state of direct-drive engine only when they are over 80 years old. According to the standards of expressway and highway design, it is impossible to have a relatively large slope when the speed is more than 80 kilometers per hour, and it is impossible to maintain a speed of more than 80 when climbing a large slope. Therefore, it is no problem for this technology to adapt to normal driving needs.