Keyword: compression ratio

  • DOMINANT TECHNOLOGIES IN “INDUSTRY 4.0”

    Influence of variable compression ratio on emissions of a single cylinder- 4 stroke engine fueled with/etanol/gasoline blends

    Industry 4.0, Vol. 8 (2023), Issue 8, pg(s) 410-412

    Impact of changing compression ratio by varying the combustion chamber geometry on the engine performance was investigated, SI single cylinder air-cooled engine fuelled with unleaded gasoline and pure ethanol was used. These tests were conducted on three different compression ratios of, 7:1 8.5:1, and 10:1 with a wide-open throttle, and three different ignition timing, before and after top died centre. . The results showed that the BMEP (brake mean effective pressure), BTE (brake thermal efficiency), and BSFC (brake specific fuel consumption) obtained with the use of gasoline blends at all CRs were generally increased when they were compared to those of pure gasoline. In general, ethanol provided a lower exhaust emission compared to gasoline’s emissions at all CRs. Furthermore NOx emissions was affected much more than other exhaust emissions when changing the compression ratios compared to un leaded gasoline © 2018 The Authors. Published by Elsevier Ltd.
    Peer-review under responsibility of the organizing committee of ICEER 2018

  • VEHICLE ENGINES. APPLICATION OF FUELS TYPES. EFFICIENCY

    Indexes of gas engine converted from a tractor diesel

    Trans Motauto World, Vol. 5 (2020), Issue 2, pg(s) 71-73

    The experience of foreign companies on conversion of diesel vehicles for natural gas operation was analyzed. The results of computer simulations of the gas engine and diesel duty cycle were presented. The features of the gas engine power system converted from the D-243 tractor diesel are shown. The efficiency of the entire range of speed and load modes of a gas engine converted from D-243 diesel to run on natural gas has been experimentally confirmed by reducing the compression ratio from 16 to 12 and equipping it with a gas supply system and ignition system. Its effective power is close to that of a base diesel engine, equivalent to a specific fuel efficiency of up to 25% higher than that of a diesel engine. There is no carbon black in the exhaust gas of the gas engine. The emissions of certain harmful substances in some modes of operation of the gas engine are higher than that of the diesel, but the total toxicity of the exhaust gases resulting from carbon monoxide in the gas engine is 1.96 times lower than that of the diesel.