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Energy balance of a vehicle equipped with hybrid propulsion system fuelled with alternative fuels

Karczewski Mirosław, Szczęch Leszek, Polak Filip

Journal of KONES

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2019

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Vol. 26, No. 4

91--96

EN

Article presents the energetic balance of small-unmanned vehicle hybrid power transmission. The vehicle equipped with serial hybrid transmission consisted of electric engines connected to the battery pack and small Diesel power generator. In mentioned construction, battery is used as energy buffer and combustion engine is used more as emergency power supply, and is turned on when battery is depleted. In other condition, power generator can be turned off, without reducing power of transmission parameters, except its range. Vehicles with hybrid drive are very common chosen vehicles by users. More and more often, we also talk about searching for replacement fuels for internal combustion engines, so also for those with hybrid drive. The research was carried out on an unmanned land platform equipped with a hybrid propulsion system supplied as standard with Diesel oil. The article presents the problems of comparing the efficiency of a hybrid vehicle fuelled with Diesel oil, but also with alternative fuels based on kerosene and other components. For test, three types of fuels were used, standard Diesel oil, F-34 and with experimental mixture of Jet A-1 fuel with 10% of 2-ethylhexanol. Energy used for charging of the battery, from tank-to-wheel, was calculated. This also enables to calculate total efficiency of such hybrid power transmission, powered with different fuels.

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Energetic balance of unmanned ground vehicle hybrid power transmission

Karczewski M., Szczęch L., Polak F.

Journal of KONES

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2018

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Vol. 25, No. 2

177--184

EN

Article presents the energetic balance of small-unmanned vehicle hybrid power transmission. The vehicle equipped with series hybrid transmission consisted of electric engines connected to the battery pack and small Diesel power generator. In mentioned construction, battery is used as energy buffer and combustion engine is used more as emergency power supply, and is turned on when battery is depleted. In other condition, power generator can be turned off, without reducing power of transmission parameters, except its range. Investigation was divided on two stages. At first stage generator, charging unit and battery were placed outside the vehicle. One piston power generator was feed by Diesel fuel. Fuel consumption of power generator was recorded from AVL fuel balance and energy parameters were recorded by power line analyser of BMR Company. Generator was connected to the direct current power plant. 70 Ah and 48 DC Lithium-polymer battery was charged from the power plant. After charging cycle, small water resistor was used to discharge the battery. Power parameters of discharged battery were measured. This enable to measure balance form tank to the battery. Second stage of the energetic balance determination was to measure internal resistances of vehicle power transmission from current inverter/converter connected to the engine and through the transmission up to the wheels of the vehicle. Power loss of energy at different speed of vehicle wheels without ground contact was measured in respect of power consumption. The series hybrid transmission is consider less efficient than parallel but because of specific configuration of power transmission, it was possible to reach higher efficiency

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Miejskie autobusy hybrydowe Volvo

Pawlak G.

Autobusy : technika, eksploatacja, systemy transportowe

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2012

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R. 13, nr 1-2

30-33

PL

W artykule przedstawiono równoległy hybrydowy układ napędowy stosowany w autobusach Volvo 7900 Hybrid. Przedstawiono zalety proekologiczne tego pojazdu, potwierdzone podczas testów w kilku polskich miastach w 2011 r.

EN

In the article there is presented parallel hybrid transmission system, applied on "Volvo 7900 Hybrid" buses. There are presented pro-ecological advantages of the vehicle, which were confirmed during test in some Polish cities in 2011.