Abstract
ABSTRACT
Directive 30/2003 of the European Union stipulates the use of bio-fuels in the automotive transportation among the other fuels used up to 2.0% (energetic content) until December 31st 2005 and up to 5.75% until December 31st 2010. The use of ethanol-gasoline mixtures as alternative fuels in spark ignition engines is very complex and presumes theoretical and experimental researches. This paper presents a thermogas- dynamic analysis of the processes developed inside the cylinder of the SI engine; there are presented the influences of the adjustment and operating parameters as well as of the fuel nature on the engine performance using several categories of mixtures fuels (gasoline and ethanol) comparing to those recorded when only commercial gasoline is used. From the point of view of gasoline-ethanol mixtures combustion, some experimental investigations have been made referring to the flames velocities and knock behavior in the cylinder engine.