Which is better, unleaded gasoline or ethanol, or automobile engine?

Gasoline is unleaded gasoline. No matter what 92# gasoline or ethanol gasoline you use, it is unleaded, because leaded gasoline has long been banned internationally, but unleaded gasoline does not contain lead at all. Crude oil still contains trace lead, but the content is very low, and the lead content per liter of gasoline is only about1%g. Ethanol gasoline is a fuel processed from grains and various plant fibers. It is a new type of fuel which is made of ethanol and ordinary gasoline in a certain proportion. According to China standard, it is blended with ethanol gasoline "90 unleaded gasoline fuel ethanol 10%". When the ethanol content in ethanol gasoline is controlled within 10%, the corrosion is very slight. When the ethanol content exceeds 15%, additives must be injected into the fuel to inhibit the formation of corrosion.

Another point is that ethanol itself has certain water absorption. If ethanol gasoline is stored for a long time, its water content will gradually increase, which will bring certain combustion problems to the engine. After replacing ethanol gasoline, the most obvious feeling of pure gasoline is that it is not durable On the one hand, it is caused by the decline of power. After all, in some cases, you should step on the accelerator more after the power drops. Another important reason is that the air-fuel ratio of ethanol is smaller than that of gasoline. Burning the same amount of ethanol requires less air. In order to consume the air entering the cylinder every time, ECU controls to increase the fuel injection quantity.

In fact, the use of ethanol gasoline is not unique to us. Brazil was the first country to use it, and it was also popular in the United States, Europe and other countries for some time. The biggest advantages of ethanol gasoline are high antiknock performance and low emission pollution. The acquisition of fuel component ethanol is very convenient and the technology is mature. As long as the ethanol content is controlled within 10%, cars can almost directly use ethanol gasoline without special modification. To sum up, in recent years, all kinds of information and news about the ban on the sale of ethanol gasoline in Europe have been circulating on the Internet. It is difficult to comment, because the hot comments on a car have not been investigated on the spot, and the specific policies of those countries have not been checked.

Fuel ethanol is indeed hydrophilic, but how to contact the water in the sealed fuel tank? At this point, some people will say that the air contains water vapor, but it is difficult for air to enter the fuel tank; Because gasoline is a volatile fuel, it is volatile most of the time. The volume of fuel will expand from gas to liquid. In order to prevent the internal pressure from cracking the fuel tank, a "carbon tank system" is designed. The fuel vapor will flow to the carbon tank through the pipeline, the fuel will be absorbed by the activated carbon, and the gas will be squeezed out from the breathing hole. Can air still enter the fuel tank? The products of ethanol combustion are mainly carbon dioxide and water. Adding 10% is equivalent to reducing the emission of gasoline hydrocarbons, nitrogen oxides, carbon monoxide and particulate matter 10%. People need to breathe, and car users are no exception; Therefore, reducing emissions and improving air quality through E 10 ethanol gasoline seems to be beneficial to everyone, especially to 1 0 billion people who don't drive.