China's electric vehicle technology lags far behind the internal combustion engine

"The core technology of electric vehicle is the battery. The standard for measuring whether electric vehicle technology is leading is the battery technology. The gap between our country's technology and the international leading field is even higher than that of the internal combustion engine." On October 18, the 7th China Internal Combustion Engine Research Institute At the Second National Congress of Members and the 8th Annual Meeting of the Society, Zhang Xiaoyu, Chairman of the China Combustion Engine Society, was shocking. Since the introduction of the new energy vehicle plan of the Chinese government, the low tuning industry generally believes that the technology gap with foreign countries is the smallest, and even in the field of battery technology, there is even a certain leading electric car. Zhang Xiaoji’s speech to China’s purely electric vehicles launched with interest. Alarm bell.
Zhang Xiaoxuan told the reporter of “Daily Economic News” that “we generally think that China’s electric vehicle technology is a leading position in the international field, and the view that the gap with the international top technology is relatively small is wrong.”

“The current problem is the battery volume compression problem based on the guaranteed power, which is a problem in the international community. Then the battery arrangement is closely related to many components, and any component of the electric vehicle will have problems in operation. This makes the electric vehicle appear to be malfunctioning, which is a significant drawback in terms of technical requirements relative to the internal combustion engine.In addition, the electric vehicle is also greatly affected by external factors, such as temperature, too low or too high temperature will cause problems. ," Zhang Xiaoyu told reporters.

Zhang Xiaolu also believes that from the market point of view, the future of the internal combustion engine shows that the mainstream position is that electric vehicles can not be compared, the next 20 years, more than 80% of the car is still the internal combustion engine as an engine, from the situation also confirmed the internal combustion engine research and development Necessity and importance.

Tsinghua University’s State Key Laboratory of Automobiles and Energy, Professor Wang Jianwei issued a report “Research Progress on Efficient Clean Vehicles”. The report stated that the occupancy rate of the internal combustion engine in the gasoline engine market is still the dominant position in the next 20 years. Wang Jianye mainly analyzed the marketization of diesel engines. He believes that the future market of diesel engines is not optimistic. The obvious example is that the market share of diesel vehicles is low, and it has been a downward trend since 07. The reason is that the gasoline engine has many advantages compared to the diesel engine itself: the combustion method is soft, the small displacement of the booster pressure imposes less stringent requirements on the material quality of the engine, the cost is low, and the problem of knocking is small.

Prof. Jiantao Wang told the reporter of “Daily Economic News” that GDI will be the mainstream of future gasoline-powered locomotives. In the future, energy-saving and emission-reduction will be the mainstream in the world. GDI will have better advantages in pressurization and small displacement, while GDI faces GDI. The third reform is an opportunity for China to enter the third generation of GDI. GDI System, as its name implies, injects gasoline into the cylinder. The advantage is that the fuel consumption is low, the power is high, the mixing ratio reaches 40:1 (the mixing ratio of the general gasoline engine is 15:1), and the in-cylinder injection compression ratio reaches 12, with The power and torque are both increased by 10% compared to a normal engine of the same size.

Finally, Prof. Wang predicted the R&D direction of conventional automotive engines: Hybrid power with the advantages of gasoline and diesel is one of the directions for future research and development.

Regarding the popularization of diesel engines in the automotive field, Professor Su Wanhua, chief scientist of Tianjin University, 973 said in an interview with the reporter of “Daily Economic News” that there are some deficiencies in diesel engines compared with gasoline engines: higher manufacturing costs and higher commercial operating prices The diesel engine has more stringent requirements for oil blending, and the diesel engine power in the general sense is higher than that of the gasoline engine. Due to the high speed development of the gasoline engine, the increase in the utilization rate of 10% can make the gasoline engine power comparable to the diesel engine, reaching 40%.

Professor Su Wanhua said that the speed of gasoline engine R&D is much higher than that of diesel engine research and development. Therefore, in the market application field, it is also an important factor for gasoline engines to dominate. It is undeniable that some of the advantages of diesel engines are unmatched by gasoline engines due to the combustion of diesel engines. Diversification also provides room for improving the combustion efficiency. By controlling the full mixing time, controlling the chemical earnings ratio can completely avoid or reduce the generation of soot and nitrogen oxides, and achieve energy conservation and emission reduction standards.