Características del proceso de combustión en un motor CFR de gasolina

Abstract

The deleterious of the environment is caused by the wasting of the natural energy sources together with its indiscriminate use. The heavy duties are done by machines where the energy transformation into the engine combustion chamber should be obtained with maximum efficiency. It means looking for the solution to problems like: pollution control, reduce excessive heat lost, reduce the incomplete combustion, improve engine instabilities and reduce parts motor damage. The fuel air variation due to fluctuations on the fuel and air supply appears to be as the main problems which modify the combustion process on SIE. New fuel systems working with electronic devices have been used on SIE trying to work out these problems, however due to the instability, not predictable and complex characteristic of the combustion process the cyclic variation among the engine cycles is still there. An improvement on the engine working conditions when fuel air ratios are close to unity is reached although the fuel economy decrease and the pollution agents increase. Experimental pressure with different mixture richness obtained in a CFR engine is used to find out some criteria to analyze its influence on the cyclic pressure variation. The following parameters: pmi, s(pmi), (Dp) j, pmax vs j(D pmax) as a function of crank angle degree were studied found a better combustion process with lightly rich mixtures.