Automobilska i poljoprivredna industrija postavljaju brojne zahteve pred razvoj klasičnih oto i dizel motora SUS / The automotive and agricultures industry are facing many challenges for development of classical IC engines
2012
Pešić, R. (Faculty of Engineering, Kragujevac (Serbia)) | Petković, S. (Faculty of Mechanical Engineering, Banja Luka (Bosnia and Herzegovina)) | Hnatko, E. (Croatian Academy of Engineering, Zagreb (Croatia)) | Veinović, S. (Faculty of Engineering, Kragujevac (Serbia))
Today, Serbia imports more than 75% of the oil we consume, more than 95% of which is used for transportation. Improved engine technologies, optimized combustion and multi fuel systems can improve near- and mid-term fuel economy for passenger 25-40%, commercial and agricultural vehicles about 20%. The traditional Otto and Diesel cycle engine, the most common engine type, has repeatedly been improved but economically fuel consumption and emission results are far from satisfying. The World systems presented a significant step to improve today's engine properties: - Downsizing in combination with turbocharging currently represents the main technology trend. - VCR (variable compression ratio) compared to conventional engines with constant compression ratio, allows a substantial reduction in fuel consumption in the full load zone; with flexible Otto/Diesel cycle and HCCI combustion will combine the fuel efficiency of an ICdiesel engine with the exhaust gas quality of an IC-gasoline engine. - The future will bring new diversity of fuels and with this change comes a proliferation of engine variants to cater for alternative fuels (ethanol blends, biodiesel, propane, compressed natural gas, hydrogen and electricity).
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