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1

DME as a fuel for SI engines cars

Fabiś Paweł

Diagnostyka

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2021

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Vol. 22, No. 1

93--99

EN

The article presents an analysis of the possibility of using DME fuel to power internal combustion engines. The possibilities of using DME as an engine fuel in relation to world and European achievements have been widely discussed. Moreover, the preliminary results of the tests determining the possibility of using the DME-LPG mixture to power the diesel engine are presented. The research consisted in determining the influence of the DME-LPG mixture on the power and torque of the engine at various loads. The changes in the temperature of the exhaust gases were also determined in relation to the different proportions of DME in the mixture.

PL

W artykule przedstawiono analizę możliwości zastosowania paliwa DME do zasilania silników spalinowych. Przeprowadzono szerokie omówienie możliwości zastosowania DME jako paliwa silnikowego w odniesieniu do osiągnięć światowych i europejskich. Ponadto przedstawiono wstępne wyniki badań określających możliwość zastosowania mieszaniny DME - LPG do zasilania silnika ZI. Badania polegały na określeniu wpływu mieszaniny DME - LPG na moc i moment obrotowy silnika przy różnych jego obciążeniach. Określono także zmiany temperatury gazów wylotowych w odniesieniu do różnych udziałów DME w mieszaninie.

2

Reproduction of chassis dynamometer driving cycles on the road as a means of achieving repeatable on-road emissions tests

Vojtisek-Lom M., Fenkl M.

Journal of KONES

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2008

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Vol. 15, No. 4

577--582

EN

Projected increases in the cost of conventional fossil energy sources and greenhouse gas emissions caps are among the key drivers for the utilization of various gaseous fuels prepared from biomass in internal combustion engines, primarily in cogeneration units. Due to the low energy content and other poor qualities of many such fuels, they are often intended to be co-fired with diesel fuel, or used in blends with natural gas or other gaseous fuels. Variations in the composition of the biogas, limited capabilities of gas mixing and metering devices, and other factors create challenges in determining the intake charge composition, so that optimal mixture of air and multiple fuels can be maintained. In this study, an experimental device for mixing of two gaseous fuels was tested, with various gases, on a bus engine modified to run on experimental gaseous fuel blends. To evaluate the performance of the mixing device, the composition of the mixture of two fuel gases was continuously analyzed by an inexpensive NDIR ,”garage-grade” exhaust gas analyzer. The focus of this paper is on the adaptation of the analyzer for this purpose, including calibration and linearization techniques, its verification, and performance. Preliminary results show that this analyzer, commonly used for automobile inspection and maintenance purposes, can serve, albeit with precautions and limitations, as a relatively simple tool for field measurements of the composition of a fuel gas mixture, both raw and mixed with air.

3

Analysis of gaseous fuel blends and mixtures using inexpensive "garage" gas analyzers

Vojtisek-Lom M., Fenkl M.

Journal of KONES

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2008

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Vol. 15, No. 3

535-541

EN

Projected increases in the cost of conventional fossil energy sources and greenhouse gas emissions caps are among the key drivers for the utilization of various gaseous fuels prepared from biomass in internal combustion engines, primarily in cogeneration units. Due to the low energy content and other poor qualities of many such fuels, they are often intended to be co-fired with diesel fuel, or used in blends with natural gas or other gaseous fuels. Variations in the composition of the biogas, limited capabilities of gas mixing and metering devices, and other factors create challenges in determining the intake charge composition, so that optimal mixture of air and multiple fuels can be maintained. In this study, an experimental device for mixing of two gaseous fuels was tested, with various gases, on a bus engine modified to run on experimental gaseous fuel blends. To evaluate the performance of the mixing device, the composition of the mixture of two fuel gases was continuously analyzed by an inexpensive NDIR ",garage-grade" exhaust gas analyzer. The focus of this paper is on the adaptation of the analyzer for this purpose, including calibration and linearization techniques, its verification, and performance. Preliminary results show that this analyzer, commonly used for automobile inspection and maintenance purposes, can serve, albeit with precautions and limitations, as a relatively simple tool for field measurements of the composition of a fuel gas mixture, both raw and mixed with air.