BYD DM-i Super Hybrid debuts, with engine thermal efficiency of 43%, the highest in the world

As a leader in new energy vehicles, BYD has taken the lead in strategically segmenting plug-in hybrid technology. After defining the "absolute performance" of plug-in hybrid models with DM-p super power technology, BYD has gone a step further and will launch the DM-i super hybrid technology with "ultra-low fuel consumption". In mid-November, one of the core components of BYD's DM-i super hybrid technology, the Xiaoyun-plug-in hybrid dedicated 1.5L high-efficiency engine, was officially unveiled.

The Xiaoyun-plug-in hybrid 1.5L high-efficiency engine is specially designed for DM-i super hybrid technology. It is developed with the goal of achieving ultra-low fuel consumption, with a thermal efficiency of up to 43%, making it the world's most efficient mass-produced gasoline engine. This engine is not only super fuel-efficient and easily meets the "National VI b" emission standards, but also provides smooth and quiet driving enjoyment with its excellent NVH performance. It will play an important role in DM-i super hybrid technology.

Hard-core technology supports a new level of engine thermal efficiency

Behind the ultra-high thermal efficiency of the Xiaoyun-plug-in hybrid 1.5L high-efficiency engine is a series of powerful and superior technical measures. It has an ultra-high compression ratio of 15.5, a larger stroke-bore ratio, adopts the Atkinson cycle, is equipped with an EGR exhaust gas recirculation system, takes a series of friction reduction measures, and optimizes the engine control system for the goal of high thermal efficiency.

BYD has used split engine cooling technology for the first time on this engine. By controlling the temperature of the cylinder head and cylinder block, it provides precise cooling for the cylinder head and cylinder block on demand, so that both the cylinder head and cylinder block are at the optimal operating temperature, improving engine efficiency, shortening the cold start warm-up process by 15%-20%, and reducing fuel consumption and emissions during the warm-up process.

In addition, this engine also makes full use of the electrification advantages of plug-in hybrid models, electrifies accessories, eliminates the traditional engine front-end gear train, further reduces losses and improves efficiency. In terms of NVH performance, which is of concern to Chinese users, this engine has specially optimized the crankshaft, bearings, cylinder block, intake manifold, oil pan, timing cover, cylinder head cover and other parts according to the working characteristics of the plug-in hybrid system.

A large number of solid technological innovations have enabled the Xiaoyun-plug-in hybrid 1.5L high-efficiency engine to achieve the highest thermal efficiency of mass-produced gasoline engines in the world, laying a solid foundation for the "ultra-low fuel consumption" of BYD's DM-i super hybrid technology.

DM-i Super Hybrid will launch a "counterattack" in the fuel vehicle market

The "New Energy Vehicle Industry Development Plan (2021-2035)" mentioned that in 2025, new energy vehicles in my country will account for 20% of the total sales of new cars. Among them, plug-in hybrid technology has great potential. BYD has taken the lead in entering the "dual platform" strategic era of DM hybrid technology, which will further enhance the "penetration" of plug-in hybrid models into traditional fuel vehicles. The DM-p super-power technology, which has been maturely applied to BYD models, provides power performance that crushes large-displacement fuel vehicles, attracting consumers who have high demands for driving pleasure, pay attention to environmental protection, and yearn for a green lifestyle; the new models that will be launched using DM-i super hybrid technology have lower fuel consumption, faster start, smoother and quieter, more environmentally friendly electric, and no purchase restrictions. The product strength and use experience are fully surpassed, which can be called a dimensionality reduction attack on fuel vehicles. However, the price of models equipped with DM-i super hybrid technology is comparable to the purchase price of foreign-funded fuel vehicles of the same level-this will reshape the competitive relationship between plug-in hybrid vehicles and fuel vehicles, and strongly change consumers' views on new energy vehicles.

For a long time, although the Chinese passenger car market is large, the market share of Chinese brands has always been lower than that of foreign brands. Especially in the traditional fuel vehicle market, German, Japanese and American models have performed well in the market by virtue of their first-mover and brand advantages, like three "mountains" blocking Chinese auto brands.

Li Yunfei, deputy general manager of BYD Auto Sales Co., Ltd., said: "BYD has always insisted on self-reliance and self-improvement in core technologies. With the advantages of new energy technologies, we have achieved major breakthroughs in some key technology fields, such as DM-i super hybrid technology. With the rise of powerful Chinese cars, we are confident of regaining lost market share. Soon, models equipped with BYD DM-i super hybrid technology will launch a 'counterattack' in the fuel vehicle market, accelerating the pace of new energy vehicles replacing traditional fuel vehicles!"

As a winner of Toutiao's Qingyun Plan and Baijiahao's Bai+ Plan, the 2019 Baidu Digital Author of the Year, the Baijiahao's Most Popular Author in the Technology Field, the 2019 Sogou Technology and Culture Author, and the 2021 Baijiahao Quarterly Influential Creator, he has won many awards, including the 2013 Sohu Best Industry Media Person, the 2015 China New Media Entrepreneurship Competition Beijing Third Place, the 2015 Guangmang Experience Award, the 2015 China New Media Entrepreneurship Competition Finals Third Place, and the 2018 Baidu Dynamic Annual Powerful Celebrity.