Abstract. The paper analyzes the power demand of the auxiliary systems of electric cars. On the basis of existing electric cars an analysis of energy consumption of different auxiliary systems is done. As a result possibilities for rational use of these systems have been proposed, which can increase the mileage per one charge of the battery.
The paper presents the results of a laboratory investigation on the variation of the tyre sliding grip coefficient depending on the tyre construction, the air pressure, the vertical load and the wheel camber. Eight different models of tyres are tested. A significant reduction of the tyre sliding grip coefficient on a hard ground was registered, when the tyre pressure is low and the wheel camber is bigger. The analysis of results and explanation of causes are done.
This report introduces the study results of a Citroen Berlingo converted into an electric car. It presents the energy properties of road and laboratory tests. Initially the structure of the converted car is described, and characteristics of the main car elements are given. Then, the power and energy characteristics of the converted car are obtained and analyzed. On the road, energy consumption at different constant speeds is registered. In addition, at laboratory, the energy consumption during the Special Cycle for Electric Vehicles and Driving Cycle ECE-15 has been obtained. A comparison of the energy consumption of the studied car and serial BEV was done, and it shows good energy efficiency of the converted car during the driving cycles.
The paper presents a model and the results of theoretical and experimental research regarding the change in a vehicle's critical speed for different kinematic parameters of the turning motion. Six combinations of turning, braking, and longitudinal road inclinations are studied. The results show that in some cases a significant reduction in the critical speed in a curve takes place owing to the change in the normal tyre forces.
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