Keyword: gas engine

  • MECHANIZATION IN AGRICULTURE

    Experimental studies of a wheeled tractor running on alternative fuel

    Mechanization in agriculture & Conserving of the resources, Vol. 68 (2024), Issue 1, pg(s) 8-10

    The results of experimental studies of a wheeled tractor with a diesel engine converted into a spark-ignition gas engine are presented. The D-243 diesel engine was converted into a spark-ignition gas engine for operation on natural gas, and its bench tests were conducted, confirming its operational capability and demonstrating good performance indicators. It was found that the total toxicity, reduced to carbon oxide, of the gas engine is 1.9 times lower than that of the diesel engine. This is particularly important when using the vehicle for technological purposes, as it can operate indoors in this case. Using the same technology and components, the MTZ-80 tractor was also converted for operation on gas fuels. Road tests were conducted, and certain operating parameters were investigated: engine crankshaft rotation frequency, intake manifold pressure, throttle valve opening angle of the air-fuel mixer, and the rotation frequency of the vehicle’s driving wheel, which can determine its speed. The obtained data were used to verify the adequacy of the mathematical model of the tractor’s movement during the driving cycle.

  • 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.