Hydrogen is hydrogen cars as the main energy of the moving car. General internal combustion engine, typically injection diesel or gasoline, hydrogen gas is used instead of hydrogen cars. The fuel cell and the motor may replace the general engine, i.e., the principle of hydrogen fuel cells is the hydrogen input of the fuel cell, the electrons of hydrogen atoms are proton exchange membrane barrier, through an external circuit from the negative electrode conductive to the positive electrode, into electricity driving a motor; proton but pure water mist may be discharged with oxygen exchange membrane by proton. This effectively reduces the air pollution caused by vehicles other fuel, high-speed vehicles, buses, submarines and rockets have been used in different forms of hydrogen. On the other hand energy has always been a problem in recent years, the international hydrogen as fuel ldquo; fuel cell engine rdquo; technology has made a major breakthrough, and ldquo; fuel cell vehicles rdquo; has become the driving ldquo; hydrogen economy rdquo; engine .
using hydrogen as a fuel has many advantages, first of clean, product of burning hydrogen is water, will not pollute the environment, followed by a high ratio of hydrogen gas during combustion heat. In 1965, foreign scientists have been able to design a driving hydrogen cars on the road. China has also succeeded in 1980 made the first one hydrogen cars, can take 12 people, the hydrogen storage material 90 kg. Hydrogen cars driving road is long, long life, the biggest advantage of using it is not polluting the environment.
Hydrogen is substituted petroleum fuels, combustion products are water and small amounts of nitrogen oxides, little air pollution. Hydrogen from electrolysis of water, a large amount of coal gasification preparation, and does not require a large automobile engines modified, hydrogen vehicles thus have broad application prospects. Promote hydrogen cars need to address three technical issues: a number of methods of preparing low-cost hydrogen, traditional electrolysis method is expensive and time-consuming additional resources to the promotion; solve the problem of hydrogen storage and transportation security; required to solve high-performance car, the hydrogen supply system inexpensive. Currently there are three common feed system, the timing of a jet pipe, high pressure and low pressure in-cylinder injection type in-cylinder injection type. With the progress of research in hydrogen storage materials, you can open up new avenues for hydrogen cars. Recently, scientists have developed high-efficiency hydrogen fuel cell, but also reduces the loss of hydrogen and heat loss.