What does that gasoline mean?

The quality of gasoline is not necessarily high, but the number and ** of gasoline have really risen.

That's a code name. 90 is the number 90.

The designation of gasoline, i.e., the ratio of the knock resistance of actual gasoline to the knock resistance of standard gasoline. The higher the grade, the stronger the anti-explosion performance. Standard gasoline is composed of isooctane and n-heptane.

Isooctane has good knock resistance, and its octane number is set at 100; N-heptane has poor knock resistance, and is prone to detonation on gasoline engines, and its octane number is set at 0. If the gasoline is marked 90, it means that the gasoline of this grade has the same anti-knock properties as standard gasoline containing 90% isooctane and 10% n-heptane. At present, there are 4 types of motor gasoline brands used in China:

Car gasoline, 93 car gasoline, 95 car gasoline, 97 car gasoline. 90 The octane number of motor gasoline is above 90, and the octane number of 97 motor gasoline is above 97. The basis for the selection of vehicle gasoline is the compression ratio of the gasoline engine, if the engine compression ratio is low, the lower grade of gasoline is selected, and if the engine compression ratio is high, the high grade of gasoline should be selected.

For cars with a gasoline engine compression ratio of more than 8, it is necessary to choose more than 93 vehicle gasoline to ensure the normal operation of the gasoline engine.

Gasoline is a volatile and flammable hydrocarbon mixture liquid that is fractionated and cracked from petroleum, and can be used as fuel. The appearance is a transparent liquid, flammable, the distillation range is 30 to 220, the main components are C5 C12 aliphatic hydrocarbons and naphthenes, as well as a certain amount of aromatic hydrocarbons, gasoline has a high octane number (anti-knock combustion performance), and according to the octane number is divided into 89, 90, 92, 93, 95, 97, 98 and other grades, from January 2012, gasoline grades 90, 93, 97 revised to 89, 92, 95.

On October 27, 2017, the World Health Organization's International Agency for Research on Cancer (IARC) released a preliminary list of carcinogens, and engine exhaust and gasoline were included in the list of Class 2B carcinogens.

Question 1: What does it mean that I have gasoline i'm almost out of gas

I: i; my; me

The: The fourth power of 2 i...

Gasoline: gasoline; gasolene; petrol; .

Fast: fast; quick; rapid; swift; s ..

With: 40 minutes to run the course in 4 ...

Finish: e to an end; be over; .

Question 2: What does it mean that someone poured gasoline on me and lit it 20 points Warning you, it means that you have pretended to him.

Question 4: What does it mean when I refuel to always say that oil is limited When I refuel, I always say that oil is limited to mean that the oil is in doubt. Because the detection device is mechanical after all, not a person with a high judgment ability.

Only one range can be defined by the engineer, and even within the range, there is a problem of the oil temperature and the depth of concentration. Therefore, it is not possible to say bluntly that "there is a problem with the oil". If there is a problem, people will feel uncomfortable listening to it, and you need to give evidence and point out where the problem is.

Therefore, after thinking about it, "oil limit" is the most compromise prompt. You can do it if you want, you can't do it, and no one can offend anyone.

Question 5: What does it mean to be oily This is the name of slang! It's what it means to take advantage of me!

Question 6: What does it mean that you are all oil In the vernacular, if you want to get the benefits, others will stretch out a hand and think about it.

Question 7: What does my girlfriend mean when she says that she feels like I'm oily I don't pay attention to hygiene, my hair is oily, my collar is oily, and my face is oily.

Question 8: What does soybean oil mean Send a message on Douban. Take the bean post homonym

Question 9: What does a girl mean when she said to me that you are oil and I am water? It means that the two of you are not suitable, and oil and water will not blend. A tactful rejection of you.

I wish you all the best and be happy every day.

The main components of gasoline are C4 and C12 hydrocarbons, which are one of the mixed hydrocarbon items.

The main components of gasoline are C4 and C12 hydrocarbons, which are one of the mixed hydrocarbon items. It is a colorless or yellowish, volatile and flammable liquid with a special odor. Gasoline is insoluble in water and easily soluble in benzene, carbon disulfide and alcohol.

The composition of gasoline is more complex, mainly alkanes, from C4 to C12, of which C5 to C9 are the main ones.

The composition of various gasolines is different, so their physicochemical constants are also different, and there is a certain amplitude, such as: the boiling point is 40 200, the flash point is 58 10, and the specific gravity is.

Uses of gasoline.

According to the use, it can be divided into three categories: aviation gasoline, vehicle gasoline, and solvent gasoline. It is mainly used as a fuel for gasoline engines, and is widely used in automobiles, motorcycles, speedboats, helicopters, agricultural and forestry aircraft, etc. Solvent gasoline is used in rubber, paint, grease, spices and other industries, gasoline can also dissolve oil stains, etc., water can not dissolve substances, can play a role in cleaning oil stains.

A liter of gasoline is a volatile and flammable hydrocarbon mixture liquid that is fractionated and cracked from petroleum and can be used as fuel. Gasoline is a volatile and flammable hydrocarbon mixture liquid that is fractionated and cracked from petroleum, which can be used as fuel, with a transparent liquid appearance, flammable, with a distillation range of 30 to 220, the main components are C5 to C12 aliphatic hydrocarbons and naphthenic hydrocarbons, as well as a certain amount of aromatic hydrocarbons, and gasoline has a high octane number.

The origin of gasolineIn the mid-19th century, the importance of gasoline was not yet recognized, and kerosene for lighting lamps was used in large quantities. At that time, petroleum refining relied on a simple distillation process to separate the components of the oil with different boiling points, and in the mid-to-late 19th century, the internal combustion engine using gasoline was created, and in 1886 the gasoline engine was successfully operated as a car power.

Gasoline is one of the chains of petroleum products, and the chemical formula of its main component is C8H18.

The main components of gasoline are C5 C12 aliphatic hydrocarbons and naphthenic hydrocarbons, as well as a certain amount of aromatic hydrocarbons, and there is no fixed chemical formula. Gasoline is a colorless to pale yellow flowing liquid at room temperature, difficult to dissolve in water, flammable, with a distillation range of 30 to 220 degrees Celsius and a content of 74 123 grams in the air when exposed to fire**. The calorific value of gasoline is about 44,000 kilojoules (the calorific value of fuel is the heat produced after the complete combustion of 1 kg of fuel).

Features of gasoline

Gasoline often contains mechanical impurities and moisture. Mechanical impurities will cause serious consequences such as oil circuit blockage, abrasion and aggravation of seepage damage. The water flushing ridge is mixed into the gasoline, which will accelerate the oxidation of the gasoline, and form an acidic aqueous solution with the low-water molecular organic acids in the gasoline and corrode the metal, and it is easy to freeze at low temperatures to form ice particles to block the oil circuit.

Therefore, the mixing of mechanical impurities and water should be strictly controlled in vehicle gasoline.

The ability of gasoline to resist oxidation under normal temperature and liquid phase conditions is called the oxidative stability of gasoline, or stability for short. The indicators to evaluate the stability of gasoline are divided into iodine value, actual gum content, and induction period.

The above content refers to Encyclopedia - Gasoline.

Gasoline is fractionated and cracked from petroleum and has volatile.

Flammable hydrocarbon mixture liquids that can be used for combustion.

Material. The appearance is a transparent liquid, flammable, and the distillation range is 30

to 220, the main components are C5 C12 aliphatic hydrocarbons and rings.

alkanes, as well as a certain amount of aromatic hydrocarbons, gasoline has a higher .

Octane number (anti-knock combustion) and octane number.

The high and low are divided into 89, 90, 92, 93, 95, 97, 98 and other grades, from January 2012, steam.

The oil grades 90, 93 and 97 were revised to 89, 92 and 95.

27 October 2017, World Health Organization International Cancer.

The list of carcinogens published by research institutions is preliminarily sorted out for reference, and gasoline is in the list of class 2b carcinogens.

The scientific name for the label of gasoline should be "octane number", the higher the octane number, the higher the temperature at which it will deflagrate.

The most popular gasoline on the market is unleaded gasoline and has equal labels. These numbers are marked by the octane number of gasoline, which represents the anti-knock resistance of gasoline, and the octane number of gasoline is used to measure the index that gasoline does not produce deflagration in the engine, and the higher the octane number, the better the anti-detonation. The octane number is determined in a specially designed single-cylinder testing machine equipped with a variable cylinder head and knock sensor, which changes the compression ratio by means of a variable cylinder head. Standard gasoline is formulated from different proportions of isooctane and n-heptane, of which isooctane does not produce deflagration but has a high cost, and can be used as a standard with excellent anti-knock performance, and the octane number is set at 100; The n-heptane deflagration is serious, and it is used as a standard for poor anti-knock performance, and the octane number is set at 0.

These two hydrocarbons can be blended in different proportions to make standard fuels with octane ratings ranging from 0 to 100. Gasoline with unknown octane number is measured under the same test conditions, and the deflagration reaction occurs when the compression ratio of the testing machine increases, and the octane number of the measured fuel can be determined when the degree of deflagration produced by the fuel is "matched" with the standard fuel value. For example, if the test fuel has the same degree of knocking as the standard fuel made with 90% isooctane and 10% n-heptane, the octane number of the fuel being tested is 90.

Each number is determined in this way.

The number of gasoline is generally speaking, the grade of gasoline, that is, the quality of the quality.

Classification of vehicle fuel labeling.

For example, 90 gasoline can be guaranteed to be used on engines with a compression ratio of no more than 9 without deflagration.

Gasoline can be guaranteed to be used on engines with a compression ratio of no more than 97 without deflagration.

The compression ratio refers to the ratio of the total cylinder volume to the combustion chamber volume).