Determining the Growth of Energy Consumption and Power to Increase the Speed of the Car

Abstract

In city conditions, the car moves in an unstable mode. This causes frequent acceleration and worsens the efficiency and environmental friendliness of the internal combustion engine as it operates in transient mode. The use of “mild hybrid” technology can improve these performance properties. At the same time, the issue of rational parameters of components for hybridizing a car arises, as they increase its cost. Traditionally, an electric motor helps with acceleration and provides energy recovery during braking. The power of the electric motor and traction battery can be justified based on the analysis of analytical dependencies that describe the movement of the vehicle. To solve this problem, it is necessary to determine the level of additional energy to overcome the work of the vehicle’s drag forces when its speed changes. The theoretical foundations are written taking into account the assumption of a change in speed within specified limits with constant acceleration, which is possible when considering changes in vehicle speed over short periods of time. The developed analytical dependencies are the theoretical basis for determining the rational value of the electric motor power when using the “mild hybrid” technology and allow us to determine the target task of controlling the “mild hybrid” technology when accelerating a car to improve its economic and environmental characteristics.