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In recent years, the state has been advocating new energy vehicles, especially the new energy vehicles powered by hydrogen fuel cells. At present, developed countries such as Japan, South Korea and the United States have focused on the development of large-scale fuel cells, and the corporate world has also invested heavily in research and development of fuel cell technology. Now, many important achievements have been made.

The fuel cell stack acts as a chemical reaction cell, and its most critical technology core is the “proton exchange membrane”. On both sides of the film, the catalyst layer is closely attached to decompose the hydrogen into a charged ion state. Because the hydrogen molecule is small in volume, the electron-carrying hydrogen can pass through the tiny pores of the film to the opposite side, but the electron-carrying hydrogen crosses. During the film hole, electrons are stripped from the molecule leaving only positively charged hydrogen protons through the film to the other end. Hydrogen protons are attracted to the electrodes on the other side of the film in combination with oxygen molecules.

The electrode plates on both sides of the membrane split hydrogen into hydrogen ions positively and electrons, oxygen into oxygen atoms to capture electrons into oxygen ions (negative electricity), electrons form current between the electrode plates, and two hydrogen ions and One oxygen ion combines into water, and water becomes the only "waste" in the reaction. In essence, the entire operation process is the power generation process. As the oxidation progresses, the electrons are constantly transferred to form the current required to drive the car.

According to the latest statistics from abroad, compressed hydrogen has attracted the most attention in fuel cell vehicles launched so far, mainly because the fuel supply of this model is the most technically simple and feasible. The FCV (fuel cell vehicle) produced by foreign companies has made great progress in terms of driving range, maximum speed, fuel economy, and hydrogen storage pressure.

For domestic use, the research on hydrogen fuel internal combustion engines is lagging behind. It was not until the 1980s that the exploration of hydrogen internal combustion engines, which were mainly represented by famous universities such as Zhejiang University and Tianda, emerged, and the research work mainly focused on mixed-fuel engines. Hydrogen fuels are usually used as auxiliary fuels and gasoline. Traditional fuels such as diesel are mixed and burned.

For the driving cost of hydrogen fuel cell vehicles, Toyota Mirai, for example, is actually more expensive than gasoline. At present, the price of hydrogen fuel is about 9.12 US dollars (about 63 yuan) / kg, Mirai's hydrogen storage tank can store 5 kilograms of hydrogen, and it takes only 3-5 minutes to fill up the hydrogen. Take the example of 482 kilometers, the price of gasoline is about 47 US dollars (about 302 yuan), and hydrogen fuel is 57 dollars (about 366 yuan).

In general, China's research on hydrogen engines started late. In many key technical fields related to the development of hydrogen fuel engines, it is still in a blank stage or just starting stage, such as large-scale production of hydrogen energy, engine supercharging technology, Hydrogen supply systems and system safety, engine control strategies, pollutant emission control technologies, integrated electronic control management systems, etc. are all inadequate. In terms of the content of the research, the vast majority is only the theoretical exploration and research of colleges and universities. The gap in core technology is still large, and the overall technical level is not high.

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