Scientific paper ID 2019 : 2020/3

More and more stringent emissions and fuel consumption regulations are stimulating an interest in the development of safe, clean, and high-efficiency transportation. It has been well recognized that electric, hybrid electric, and fuel cell-powered drive-train technologies are the most promising solutions to the problem of land transportation in the future [1]. The hybrid electric vehicles (HEVs) or simply hybrid vehicles use both electric motors (EM) and an ICE for delivering the propulsion power [2]. This power depends on the ICE and EM torques, which must be distributed and mixed in correct proportion and work sequence. The main attention is paid to the EM and battery (B) control which ensures the HEV ecological drive modes. The aim is these modes to be prolonged and thus the HEV electrical energy efficiency becomes the main factor for its economy, ecology, and drivability. The base components of this efficiency are the HEV electric consumption and battery regeneration which are factors for evaluating and improving the energy efficiency. HEV electric consumption is connected to the battery discharge during electric motors operation and control, and regeneration is linked to the battery recharge during regeneration braking. The electric consumption and battery regeneration can be measured by special equipment and evaluated by certain method and criteria. The physical measuring of these gives the accurate results, which are essential for the correct conclusions. This paper considers the method for determining the HEV electric consumption and battery regeneration.