gasoline

As the most important characteristics of a gasoline evaporation, antidetonating quality, stability, security, and corrosion resistance.

evaporative

Refers to the ease of gasoline evaporation in the carburetor.The engine starting, warming up, accelerate, gas resistance has a significant effect, fuel consumption, etc.Gasoline evaporation by distillation range, vapor pressure, gas liquid ratio 3 index comprehensive evaluation.

1) distillation range.Refers to the gasoline fraction from the initial boiling point to the final boiling point temperature range.Aviation gasoline distillation range range than the narrow scope of motor gasoline distillation range.

(2) vapor pressure.Refers to the determination of 38 ℃ steam pressure in the standard instrument, is reflect the tendency of middle angry resistance of gasoline in the fuel system and index of engine starting is difficult.Motor gasoline requires higher vapor pressure, the requirements of the aviation gasoline vapor pressure is lower than motor gasoline.

(3) gas liquid ratio.Refers to the standard instrument, liquid fuel under specified temperature and atmospheric pressure, the ratio of the volume of vapor and liquid volume.Gas-liquid ratio is a function of temperature and use it to assess and predict gasoline vapor lock tendency, more reliable than with distillation range, vapor pressure.

Antidetonating quality

Refers to the gasoline used in various conditions antiknock ability.The motor gasoline antiknock expressed in octane number.The higher the octane number, antidetonating quality, the better.The size of the gasoline antiknock ability related to chemical composition.With branched alkanes and olefins, aromatics usually has excellent antidetonating quality.Regulation of isooctane octane number is 100, antidetonating quality;N-heptane octane value is 0, antidetonating quality is poor.The gasoline octane number by determination of octane number machine.High octane number gasoline can satisfy the need of high compression ratio of the gasoline engine.High gasoline engine compression ratio, high thermal efficiency, save fuel.Improve the gasoline octane number is mainly by increasing the high octane number gasoline components, but also by antiknock additions such as MTBE.Brand is a) the octane number of gasoline.

stability

Refers to the gasoline under natural conditions, the stability of the place for a long time.Characterized with gelatin and induction period and iodine value.Gelatin is lower, the better, the longer the induction period, the better, the standard provisions of the state, each 100 ml gasoline actual colloid shall not be greater than 5 mg.Iodine value according to the content of olefin.

corrosive

Corrosive refers to gasoline in the process of storage, transportation and use of storage tank, pipe, valve, carburetor, cylinder etc. Characteristics of the equipment corrosion.With the total sulfur, mercaptan, copper experiments and acid value representation.

security

Petrol security performance index is primarily a flash point, flash point value of the national standard strictly for 55 ℃ or higher.Low flash point, explain in gasoline mixed with light component, will bring security hidden danger of gas storage, transportation, use, can also lead to car engine can't work normally.