Will new energy really replace diesel engines? Hear what Tan Xuguang said.

Chairman of Weichai Group, Honorary President of China Internal Combustion Engine Industry Association---Tan Xuguang

First, the important role of diesel engines in the national economy

Diesel engines are one of the most important inventions in the history of mankind. Since its birth, after more than 100 years of development, diesel engines have made breakthroughs in energy saving and emission reduction technologies. They are the main source of power for commercial vehicles, construction machinery, agricultural machinery, ships, military vehicles, etc., occupying the mainstream position in the market. . According to the Ministry of Transport's "Statistical Bulletin of the Development of the Transportation Industry in 2017", the road transport with diesel engine as the leading force has taken 78.8% of the total passenger traffic in China in 2017 and 78.0% of the total freight volume, supporting the rapid development of China's economy. .

Along with the process of reform and opening up, China's diesel engine industry has made considerable progress and progress. Sales of automotive diesel engines in the domestic market increased from 631,100 units in 2000 to 3.5752 million units in 2017. Through independent technological innovation, the diesel engine industry has been struggling to catch up with the international advanced level and has completed the transformation from running to running and even leading. The technological progress of the diesel engine industry has supported China's self-owned brand commercial vehicles to occupy more than 99% of the domestic market, and has blocked the international commercial vehicle giant's products outside the country and realized bulk export.

Second, the irreplaceability of diesel engine products

In recent years, the rapid development of new energy technologies has brought tremendous pressure on the diesel engine industry, but it must be recognized that new energy technologies will not be able to achieve a full replacement of diesel engines for a long time to come.

The widely used fields of diesel engines generally have the characteristics of long continuous working time and large power demand of the whole vehicle. New energy is limited by its own technological development, and it can only be widely used in certain market segments, such as buses, municipal vehicles, and terminal tractors.

Weichai Power Engine Production Line

Due to the current energy density of lithium batteries, pure electric technology is still difficult to promote and apply in the field of heavy commercial vehicles. Taking the heavy-duty tractor with a total weight of 49 tons as an example, according to the actual use conditions of the current market, if pure electric technology is used, the lithium battery used in the whole vehicle needs to reach 3000 degrees, even if the total weight of the lithium battery is still in accordance with the national planning target. It has reached about 11 tons and costs about 3 million yuan. The charging time is very long and it has no practical value.

Hydrogen fuel cell technology is considered to be a possible technological development direction in the field of heavy commercial vehicle power. However, it is difficult to support the large-scale promotion and use of hydrogen fuel cells in the preparation, transportation, storage and filling of hydrogen. According to the International Hydrogen Energy Organization's estimates, by 2050, fuel cells will not account for more than 20% of heavy commercial vehicles.

The rapid development of new energy technologies has objectively forced the diesel engine industry to accelerate the upgrading of technology and product replacement. New energy and diesel engines will complement each other for a long time, and the two are not simple zero-sum games.

Third, the diesel engine plays a huge role in the field of energy saving and emission reduction

The continuous advancement of diesel engine technology has made it play an important role in energy conservation and emission reduction, and the potential for further energy saving and emission reduction is huge, and the technology can be implemented.

First-line employees of Weichai Power No. 2 Factory

Diesel engine fuel consumption continues to decrease. As the heat engine with the highest energy conversion efficiency, diesel engine has remarkable energy saving effect compared with other power machinery. According to the latest research results, the thermal efficiency of diesel engines has increased from the current 45% to 50%, and emissions are close to zero. For example, the thermal efficiency of diesel engines is increased from 45% to 50%, and the fuel consumption of the whole vehicle can be reduced by 11%. The whole society can reduce diesel consumption by about 19 million tons per year and reduce carbon dioxide emissions by about 60 million tons. In the future, by adopting technologies such as high-efficiency combustion and waste heat recovery, it is also possible to further increase the thermal efficiency of the diesel engine to 55%, so that the fuel consumption of the whole vehicle can be reduced by 22% on the current basis, and the whole society can reduce the diesel consumption by about 3800 per year. Ten thousand tons, reducing carbon dioxide emissions by about 120 million tons.

Weichai Power Intelligent Engine Production Line

Diesel engine pollutant emissions continue to decrease. Since 2000, China began to implement the National 1 emission regulations to implement the National 6 emission standards in 2019. The emission levels of China's diesel engine products have lag behind the European two stages from the beginning of the century, and the current national 6 emission regulations have achieved global motor vehicle pollution. The lead of control specifications. Compared with the National 1 diesel engine in 2000, the particulate emissions of the National 6 diesel engine products decreased by 97% and the nitrogen oxide emissions decreased by 95%. According to the latest research results, diesel emissions approaching zero have been commercialized and can further reduce pollutant emissions. In the next step, the four-stage emission regulations for road diesel engines and the four-stage emission regulations for non-road diesel engines will be fully implemented to speed up the replacement of existing high-emission diesel products in the market, and to promote consumer demand upgrades with lower fuel consumption and emissions.

Fourth, summary

Diesel engine technology is changing with each passing day, and the diesel engine industry is promising. With the continuous breakthrough of technology, in the future technological development cycle, diesel engines will still occupy a dominant position in heavy-duty transportation power, large-scale industrial fixed power, marine power, engineering machinery, agricultural machinery, military vehicles and other applications. Has a broad market demand and tenacious vitality. The technological advancement of diesel engines will continue to play an indispensable and fundamental role in achieving energy conservation and emission reduction and coping with climate change. The diesel engine industry still has a strong vitality and is still promising in the foreseeable future 50 years.

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