Optimization of the electronic systems controlling the gas fuel supply in diesel engines while operating in diesel-gas cycle

One of the promising directions of hydrocarbon gas applying as motor fuel while operating diesel engines in diesel-gas cycle with the use of electron-ic gaseous control systems, running the principle of gaseous substitution of diesel was described. On the basis of previously conducted tests of one of these systems - Blue-Power Diesel supplying two different kinds of gas fuel in the laboratory test of the internal combustion engine at the Novosibirsk State Agrarian University it was revealed that the potential of such systems is about 50 % utilized because electronic gas fuel control card does not take into account the particularity of the diesel en-gine. A way of improving the efficiency of these electronic systems by increasing the number of cells of the electronic supplying gas fuel card for the changing manner of the gaseous fuel dosing to repeat regulatory characteristic of the high-pressure fuel pump for the correct diesel engine operation was suggested. Comparative regulatory character-istics of the diesel engine at the rated speed in dif-ferent modes: diesel cycle, diesel-gas cycle on pro-pane-butane mixture and diesel-gas cycle on me-thane wherein the amount of gas fuel supplying was carried in accordance with the corrected elec-tronic fuel card in increments of 10 rpm crankshaft speed were discontinued. A comparative economic analysis of three modes was conducted and the following results were obtained: savings of diesel fuel in diesel-gas cycle adding about 33 % of pro-pane-butane technical mixture throughout the load range, with the addition of 40-45 % of methane, saving money on fuel costs containing propane butane reaches 22 % and containing methane is 38%, which is effective.