To figure out what kind of gasoline is resistant to burning, first we need to know what gasoline is. Gasoline and diesel are all obtained from petroleum refining (diesel is directly produced by hydrogenation equipment, gasoline equipment can only produce 89#, 92#95#98# is made by adding components on the basis of 89#), gasoline Diesel oil is a mixture of a variety of hydrocarbons. If the difference is in composition, it is the difference in carbon content per unit volume. The low carbon content is gasoline, which has the characteristics of low calorific value, low density and low volatilization. The relatively high carbon content is diesel, calorific value. Relatively high, relatively dense, and less volatile.
Gasoline has a low calorific value and burns faster, so gasoline engines can reach high speeds in a short period of time, making the engine more powerful, suitable for running high-speed passenger cars and even sports cars. The diesel has a high calorific value and does not burn very quickly, so the diesel engine does not easily reach high speed, but the low-speed torque output capability is stronger, that is, the strength is greater.
Gasoline and diesel are a mixture of various hydrocarbons and various additives.
Crude oil is directly extracted from the bottom of the earth or the bottom of the sea. It contains a variety of impurities. Among them, sulfur and nitrogen compounds are more difficult to handle, and they are not good for the environment.
The oil in the eyes of consumers refers to the comprehensive quality of gasoline, including resistance to burning, knocking, carbon deposits, etc.
1, the first is the problem of burning.
As we said above, in the petroleum refining products, the carbon content of gasoline is low, and the calorific value is low, which is not as good as diesel.
There are also subtle differences between different gas stations, different environments, and different engines with the same number of gasoline.
Ethanol gasoline is not as resistant to burning as pure gasoline, because the carbon content (heat value) of ethanol is much lower than the average carbon content of gasoline mixture; in summer, because of the high temperature, gasoline is easier to gasify and burn more thoroughly, so it is more resistant than winter. burn.
In short, whether gasoline is resistant to burning or not is determined by the amount of carbon, the carbon content is low, it is not resistant to burning, the carbon content is high, and it is resistant to burning, but the carbon content is high and it is easy to produce carbon deposits. Cleanliness is detrimental.
2, knocking. Gasoline as a mixture, the temperature and pressure required for ignition of different components are different.
In a gasoline engine, when the spark plug has not been ignited, it has been compressed, and pre-combustion will cause the engine to be unstable and cause knocking.