Mechanical Fuel System

Mechanical fuel injection systems are also known as carburetor and their task is to carburate ……

The spark produced by the spark plug at the right time at the end of the compression stroke ignites the Otto engine’s fuel-air mixture. The piston is pushed by the energy, which results in mechanical work. The process of mixing fuel and air in certain proportions outside the cylinder is generally defined as "Carburetion" and the device that provides this mixture is defined as "Carburetor".

Otto cycle engines use gasoline most often. Besides, methanol, benzol, alcohol-gasoline mixture and liquefied petroleum gas "LPG" can also be used as fuel. The amount of air required to change fuel types will depend on the composition and proportions of the combustible substances.

The purpose of the preparation of fuel is physical. It is meant to ensure that the fuel is atomized. It is possible to obtain a more uniform filling by atomizing fuel quickly with air. Air Excess Coefficient is used to adjust the filling amount. The operating conditions determine the excess air coefficient. It is dependent on high power, low exhaust emissions and low specific fuel consumption variables. The mixture preparation system must possess certain features in order to prepare the mixture.

To determine the optimal mix ratio for different load situations.

It is used to calculate accurately the air-fuel combination at maximum load and minimum load, and to adjust at a nearly constant level.