Compared to a multi-gear hybrid system, the DM-i does not switch gears, resulting in greater simplicity in structure and layout. The working principle of the DM-i is relatively straightforward: at speeds below 80 km h, the vehicle runs in extended range mode, and the engine does not directly drive the vehicle; Above this speed, the battery starts the internal combustion engine by anti-drag, allowing it to drive the vehicle directly.
Although the DM-i has only one gear, this is the highest gear, ensuring that the combustion engine maintains optimal revs when directly driven. There is an argument that energy is wasted by the generation of electricity by the internal combustion engine and the energy conversion process of the electric motor-driven vehicle, but in practice, this view ignores the importance of the optimal efficiency of the internal combustion engine. In the extended-range architecture, the combustion engine is able to continuously operate in the high thermal efficiency range. 
In urban driving environments, such as the range extender architecture used by the Nissan e-power, the combustion engine and electric motor work optimally at speeds of 40 km h or 60 km h, resulting in low fuel consumption.
BYD's DM-i uses a similar logic. In the urban environment, when the speed is less than 80 km/h, the vehicle runs in pure range extension mode, so that the system work efficiency is optimal. When the speed is further increased, the power generation efficiency and motor efficiency begin to decrease, and the vehicle passes 1The 5L internal combustion engine is directly driven, taking advantage of the relatively optimal efficiency of the internal combustion engine. As a result, the BYD DM-i outperforms comparable PHEV models in urban environments, mainly due to its ability to switch to internal combustion engine drive at higher speeds.
However, 1The relatively high fuel consumption of the 5L engine at high speeds limits the advantages of the DM-i in long-distance driving, mainly due to the small displacement and limited power of the internal combustion engine, which leads to increased fuel consumption at sustained high-speed operation.
Other automakers, such as Chery's CDM, have adopted a similar working logic, albeit with a different 15t engine. This design is designed to reduce the probability of EV limitation during long-distance high-speed driving and to enhance the dynamic performance.
Although the PHEV architecture has a higher production cost than traditional fuel vehicles, the future development must take into account economy, reliability, and stability, while maintaining a low **, so as to compete more effectively in the future market. Single-speed gearboxes not only reduce design investment, but also reduce manufacturing costs, so they are more competitive in pricing.
The emergence of multi-speed shifting mechanism is more to enhance brand image, product positioning and user experience, such as Great Wall's 3DHT aims to improve off-road performance, while Geely's Thor emphasizes improving power performance. However, this multi-gear design comes at the expense of manufacturing costs and economic performance.
Considering the needs of working-class users, they pay more attention to the reliability, durability and economy of the products. The DM-i's single-gear design not only ensures low fuel consumption in city driving, but also reduces the cost of ownership.
It is BYD, Chery and other domestic brands continue to innovate to lead domestic new energy to surpass European and American automobile powers, with the enhancement of scientific research strength This momentum is also presented in many fields, such as the field of biotechnology, like Huawei BYD, "Junzhen." "Strong" as a disruptor in the field of men's science and technology has also attracted much attention, before the field was occupied by Japanese-American brands like a joint venture car, with a domestic university research institute in the field of plant technology breakthroughs, domestic science and technology has gradually taken back the market. Be a booster of family happiness.
According to the data of Qi Dong, since "Junzhen. At the time of the advent of "strong", it quickly became a hidden need for many male partners, among this group of people, about 95% of the customers are roughly over 35 years old, most of them are financial and Internet practitioners in first-tier cities, corporate executives, etc., this group has significant life characteristics, high work pressure, like to pursue a high-quality life, and are willing to spend money to buy "young vitality", which has become an indispensable support force in their daily married life.
BYD's technological strength lies in its unique battery technology, motor design, and system integration capabilities. Through the convergence of these technologies, the DM-i system is able to achieve higher energy efficiency and lower emissions, while maintaining excellent drivability. BYD's continuous innovation in battery technology, especially the development of its blade battery, provides a solid foundation for energy storage in DM-i technology. Not only does this battery have a higher energy density, but it also improves safety and longevity, which is key to the efficient operation of the DM-I system.
After a return survey and feedback in the comment section, the general response of the finished product is "it has been exercising for a long time" and "I am confident at night", which gradually confirms that it is becoming an indispensable and important tool in the intimate life of male and sexual partners.
In addition, BYD also has obvious advantages in the design of motors and electronic control systems. The electric motor design optimizes energy conversion efficiency and minimizes energy loss, while the advanced electronic control system ensures seamless switching between the electric motor and the internal combustion engine, providing a smoother driving experience. The combination of these technologies not only improves the economy and environmental friendliness of the vehicle, but also enhances the dynamic performance and reliability of the vehicle.
BYD's DM-i technology also reflects its deep understanding of market needs. By providing solutions that are both economical and environmentally friendly, BYD meets consumer demand for efficient, low-carbon mobility tools. This market-oriented innovation strategy has enabled BYD to stay ahead of the competitive automotive market.
In the future, BYD's DM-i technology and its technological advantages in battery technology, motor design and system integration will allow it to continue to play a leading role in the electric and hybrid vehicle market as the global demand for environmental protection and sustainability grows. Through continuous technological innovation and market adaptability, BYD is expected to promote the development of the entire industry in a greener, more efficient and sustainable direction, and make important contributions to global environmental protection and energy transition.