EFFECT OF TEMPERATURE AND EXCESS AIR RATIO ON COMBUSTION PROCESS OF MIXTURES OF ERUCIC RAPESEED

The paper presents results of investigations into diesel engine fuelled with high erucic acid rapeseed oil and its mixture with diesel, petrol and ethanol at different proportions. The study was performed in a chamber with constant volume depending on temperature and air pressure and the coefficient of excess air. The main purpose of performed tests was to determine the effect of various parameters on processes of spontaneous combustion and combustion of fuels. During the study basic parameters of combustion, e.g. auto-ignition delay, greatest pressure and contractual time were compared. Studies show that increased pressure injection improves combustion process for all test fuels, and injection pressure most strongly affect the combustion process of rapeseed oil and its mixtures with ethanol.