How To Reduce The Octane Number | The Science



The Science

How to reduce the octane number

Octane number - a measure of knock resistance of gasoline and other motor fuels. It is believed that the higher the octane number, the better the quality it has fuel, which means that it is significantly affected engine. But often there is a need to reduce the octane rating of the fuel used by the engine.

How to reduce the octane number

You will need:

- single piston engine; - Portable device for determining the octane number; - Gasoline with lower octane; - Sulfur compounds.

Instruction how to reduce the octane number

Step 1:

Before considering ways to reduce the octane number, get acquainted with the features of this indicator and method for determining the octane number. The origin in the octane scale - detonation resistance heptane (octane index equal to 0).

Step 2:

Over 100 take octane izookatana. It is because of these two substances (heptane and isooctane) and comprises gasoline octane number which must be reduced. Thus, the octane number RON 92 indicates that the fuel gas has the same resistance as the detonation mixture of 92% isooctane and 8% heptane.

Step 3:

To determine the octane motor fuel compared to a reference consisting of heptane and isooctane. There are the following methods for determining the octane: Research, chromatography, and the engine by means of special portable devices.

Step 4:

Motor method for determining the index of detonation fuel sustainability implies an imitation hard drive using with single piston engine. However, this method is imperfect: value obtained in this way may be somewhat underestimated.

Step 5:

The research method also involves the use of single piston engine (without simulation of driving): This method for determining the octane number can give overestimated results.

Step 6:

A chromatographic method is used as an additional method, designed to detect any impurities in the fuel, for example, benzene. However, the most reliable method of determining the stability of the index of detonation fuel - measuring octane special portable devices.

Step 7:

Knowing the rate stability of combustible fuel detonation can bring it to the desired result, including reduced. One way to reduce the octane number - add a high-octane petrol with a lower index of detonation stability.

Step 8:

The octane number can be reduced if added to fuel oil with a high detonation stability of sulfur compounds. Furthermore, low octane number of gasoline after primary distillation: This figure does not exceed 70.

Step 9:

In addition, the stability of the detonation rate is reduced and without human intervention - at long-term storage of fuel: the day octane number may be reduced to 0.5.