BYD Auto, which is shining in the field of new energy, has turned its attention to the fuel field. This kind of operation is rare in auto companies, and it makes many people confused. Why is BYD Auto, which is already very good in the field of new energy, again? Turning to study the engine, I personally think that there must be a technology that makes BYD very confident, and BYD must have done a good job of strategic layout in the next few years.
In mid-November, BYD’s Snap Cloud-a 1.5L high-efficiency engine for plug-in hybrids was officially unveiled. The biggest highlight of this engine is that its thermal efficiency is as high as 43%, the highest in the world. We know that BYD also has a say in the field of plug-in hybrids. For example, BYD Tang DM, this car impressed me very deeply, whether it is battery life or acceleration, it is very powerful. BYD has also made a strategic segmentation of plug-in hybrid technology. For example, Tang DM we have previously contacted is subdivided into DM-p technology, which has super performance. Then the 1.5L high-efficiency engine for plug-in hybrid that we unveiled this time has been refined. Divided into DM-i technology, this technology focuses on ultra-low fuel consumption, and the power will not be weak.
The 1.5L high-efficiency engine for Xiaoyun-plug-in hybrid is specially built for DM-i super hybrid technology. Its development goal is to achieve ultra-low fuel consumption, and its thermal efficiency is as high as 43%. It is 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 brings smooth and quiet driving enjoyment with excellent NVH performance. It will play an important role in the DM-i super hybrid technology.
At the meeting, BYD also gave the design principle of the Snap Cloud plug-in hybrid engine and a series of technical measures. It has an ultra-high compression ratio of 15.5, increased the stroke-bore ratio, adopts the Atkinson cycle, and is equipped with EGR exhaust gas. Circulation system, adopts a series of friction reduction measures, and optimizes the engine control system for the goal of high thermal efficiency. On this engine, BYD has enabled the engine split cooling technology for the first time. By controlling the temperature of the cylinder head and cylinder, press It is necessary to provide precise cooling for the cylinder head and cylinder block, so that the cylinder head and cylinder block can be at the optimal working temperature, which improves engine efficiency, shortens the time of cold start warm-up process by 15%-20%, and reduces the warm-up process Fuel consumption and emissions.
In addition, this engine also makes full use of the electrification advantages of plug-in hybrid models to electrify accessories and eliminate the traditional engine front-end wheel train, which further reduces losses and improves efficiency. Regarding the NVH performance that Chinese users are concerned about, this engine is based on the working characteristics of the plug-in hybrid system, and the crankshaft, bearings, cylinder block, intake manifold, oil pan, timing cover, cylinder head cover, etc. The parts have been specially optimized design.
Finally, Li Yunfei, Deputy General Manager of BYD Sales, also explained why the fuel plug-in hybrid engine should be reconsidered at this stage. Although China’s passenger car market is large, the market share of Chinese brands is far lower than that of foreign brands, especially in the fuel vehicle market. However, BYD's advantages in new energy technology and its key technology research and development of DM-i hybrid technology will change this. In a situation, this is also the first shot of BYD's "counterattack" launched in the fuel vehicle market.