Methodology of determining the basic parameters of all-terrain hybrid vehicles
DOI:
https://doi.org/10.31734/agroengineering2023.27.027Keywords:
vehicle, all-terrain, hybrid drive, power, transmission, range, drive schemesAbstract
The hybrid drive is becoming increasingly popular and is now being used in most of the new model generation of military vehicles (MV) in NATO countries. However, the drive schemes and basic parameters of the drive units for off-road conditions are significantly different from those used in serial hybrid drives for passenger cars and all-wheel drive general-purpose crossovers designed for paved roads.
The analysis of known MV constructions with hybrid drives confirms the dominance of the so-called serial or mix-hybrid drive schemes. There is a lack of methodology for determining the necessary basic parameters of the main units of such construction for off-road conditions in available sources of information. Therefore, it is proposed to determine the required power values of the traction electric motor and the "internal combustion engine-generator" system, the battery capacity for electric traction range, and the necessary transmission range for driving off-road and on paved roads.
The gear ratios of the main gear and the low gears of the transfer case (all-wheel drive scheme) or the gearbox (in the case of a single-drive rear engine layout) are formed to ensure the realization of the maximum power of the traction electric motor at a speed of more than 120 km/h when driving on an asphalt road and at speeds of 40-60 km/h on a typical wet all-terrain (restriction due to the conditions of extreme vibrational loads).
The studied schemes of hybrid drive off-road vehicles also allow using the "internal combustion engine-generator" system as a source of autonomous power supply, which is especially relevant in field conditions with problematic access to stationary power networks. The mixed drive scheme also provides the possibility of vehicle movement, albeit limited, in the situation of the failure of either the internal combustion engine or the traction electric motor, which is important for MV.
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