HYBRID DRIVE OF THE «MAMAI-2» CARGO-PASSENGER OFF-ROAD VEHICLE
DOI:
https://doi.org/10.32718/agroengineering2025.29.57-63Keywords:
vehicle, hybrid drive, off-road, driving range, transmission layouts, battery capacityAbstract
Based on the conducted review and analysis of hybrid drive system designs for off-road vehicles, primarily military ones, which have recently begun to appear in the advanced NATO armies, and on the generalization of operating conditions for diesel vehicles such as the Mamai buggy used in military operations, a drivetrain layout and the required parameters and characteristics have been developed in cooperation with specialists from PJSC “UkrAvtoBusProm.” These developments correspond to categories M1/N1 of class SG with AF-type bodywork in accordance with EU Directive No. 2018/858.
The fundamental difference from mass-produced hybrid passenger cars and all-wheel-drive crossovers lies in the modification of the drivetrain configuration - transitioning to a series (serial) hybrid scheme - and a tenfold increase in battery capacity to ensure a substantial all-electric range in off-road conditions with the diesel generator disengaged. Considering the diversity of off-road terrains, the issue of differentiated range assessment depending on driving conditions has been examined, along with the subsequent calculation of the required battery capacity and diesel generator power.
Special attention has been given to the additional protection of the battery and electric drive components under conditions involving swamps and water obstacles. General aspects of vehicle layout for off-road applications have also been analyzed, including the suspension system as a key determinant of mobility (speed regimes) constrained by maximum permissible vibration accelerations, the formation of the transmission gear ratio range, and the selection of appropriate tire sizes.
Building on the development of the diesel-powered Mamai buggy, an aggregate configuration has been elaborated for an operational mass of up to 2 tonnes, along with an evaluation of the potential driving range, including the possibility of using components from widely available Nissan Leaf and Toyota Prius vehicles (considering wartime conditions and the correspondingly limited service life).
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