The octane number is a measure of the detonation properties of a motor fuel. The higher the octane number, the better and longer the engine runs. But what if the octane number needs to be lowered?
Instructions
Step 1
Gasoline is meant as a mixture of isooctane, which is conventionally taken as 100 units, since it is practically not explosive when the pressure rises and normal heptane is taken as 0 units. It is practically not resistant to detonation when the pressure rises. The octane rating of gasoline 92 means that it detonates as a mixture of 92% isooctane and 8% normal heptane. Usually, after the primary distillation of oil, the octane number does not exceed 70. Antiknock agents are used to improve the quality of gasoline. Currently, the most used methyl tert-butyl ether (MTBE). It has enormous advantages over the previously used lead antiknock agents, which have a negative impact on the environment and human health. There are gasolines with an octane rating of more than 100 units. They use isooctane with different bulk additives.
Step 2
The combustion rate of gasoline directly depends on the octane number. High octane gasoline burns longer and smoother without causing shock to the pistons in the combustion chamber. The motor will run smoothly and smoothly. It is because of this that the modern auto industry produces cars with engines that run on high-octane gasoline.
Low-octane gasoline ignites when the intake valves are not yet closed, and the cylinder is not at the top point. Naturally, the engine will not operate at full capacity, plus wear on the valves, seats for them, additional carbon deposits, etc.
To increase the octane number of gasoline, special additives are used that are added to the fuel. These can be purchased at any auto store or gas station.
Step 3
there are times when it is necessary to lower the octane number of gasoline. Unfortunately, not one technical literature describes a specific way of how to do this, since it is not economical to convert expensive high-octane gasoline into cheap fuel with a low octane number. The octane number can be lowered:
1. Adding resinous substances and sulfur compounds to gasoline.
2. Adding lower grade fuel to high-octane gasoline lowers the octane number of the former.
3. Long standing gasoline. Over time, gasoline left in a container will lower the octane number. This decrease occurs from 0.2 to 0.5 units per day.
