Experimental investigation of the use of waste vehicle tires derived pyrolytic oil in reactivity controlled compression engines

In this study, the use of pyrolytic oil obtained from waste vehicle tires as a low reactivity fuel in an reactivity controlled compression ignition engine was investigated experimentally. Experimental studies were carried out in a single cylinder, four stroke and direct injection diesel engine modified to be suitable for the use of low reactivity fuels. In the experimental studies, diesel fuel of petroleum origin was used as high reactivity fuel. Gasoline and waste tire oil (WTO) were used as low reactivity fuel. The test fuels were used by volume as 70% diesel- 30% gasoline, 70% diesel- 30% waste tire oil, 40% diesel- 60% gasoline and 40% diesel- 60% waste tire oil. In experimental studies, injection times varying in conditions using 30% of low reactivity fuels at 2500 rpm engine speed and 20% engine load were investigated in the first stage. When the test results were examined, it was observed that before top dead center, gasoline and WTO fuels improved the engine performance and combustion characteristics to a certain extent under 20% load condition and RCCI30 at -160 injection time and improved some exhaust emissions. In-cylinder pressures in RCCI30 and RCCI60 cases were found to close the conventional diesel results, whereas heat release did not change significantly. In the case of RCCI60, the ringing density was observed to be lower in the case of gasoline fuel use compared to diesel. In the use of WTO, it was found that getting closer the results. It has been found that WTO in exhaust emissions has a significant effect on decreases in HC and NOx emissions and gasoline in NOx and soot emissions. Specific fuel consumption was found to be the lowest for gasoline and highest for WTO fuel. Brake thermal efficiency was low for gasoline at 0% load and RCCI30, and high at 60% load and RCCI60. In addition, WTO fuel was generally found to be low. In conclusion, experimental studies have shown that WTO and gasoline can be used successfully in RCCI engine.