Currently, major vehicle manufacturers are working to improve environmental friendliness by introducing alternative energy in motor vehicles: vehicles with combined power plants (hybrids) based on ICE, electric vehicles based on promising current sources like electrochemical generator based on fuel elements of “hydrogen-air” and traditional electric vehicles. All of the above vehicles use High-voltage battery running. The use of batteries in hybrid vehicles and electric vehicles puts forward certain requirements for them: large specific energy capacity; high resource indicator; fairly low cost. This article seeks a criterion for the performance of a high-voltage battery used as an energy source in electric vehicles. Performed an analysis of scientific publications and experiments describing the dependence of the parameters of the battery on the temperature and operating mode of the vehicle. The main parameters are determined and an assessment of their impact on vehicle performance is carried out.
Introduction (statement of the problem and relevance). Currently, the development of technical products, especially as complex as a modern car, requires solving a huge number of tasks. For this, new research methods are being created that allow testing vehicles or its components simultaneously at several development companies in the X-in-the-Loop environment.The purpose of the study is to improve the accuracy of virtual physical tests in the X-in-the-Loop environment by experimentally searching for the optimal location for installing the hot-wire anemometer on the temperature control system research stand to determine the average air flow rate at each time point.Methodology and research methods. An experimental study was carried out and an analysis was made of the flow of incoming air through the radiator of the temperature control system.Scientific novelty and results. Using the described method, the location of the hot-wire anemometer was chosen, and the correction necessary in the mathematical model was determined to conduct virtual-physical tests of the temperature control system in the X-in-the-Loop environment.Practical significance. The obtained results make it possible to carry out virtual-physical tests of the temperature control system in the X-in-the-Loop environment with high accuracy, in particular, the simulation of the driving conditions of a vehicle (speed and airflow rate) in real time.
Introduction (problem statement and relevance). At low vehicle driving speeds, when the ram airfl ow is minimal or completely absent, the airfl ow created by the radiator fan is of high importance for the heat removal. In this paper, the airfl ow through the radiator created by the radiator fan was used as a criterion of the heat removal effi ciency, which is calculated from the pressure drop in the radiator for various fan speeds. The possibility of increasing the airfl ow through the radiator by increasing the distance between the fan and the radiator through improvement of the casing design was considered.The purpose of the study is to analyze the infl uence of the radiator casing design on the heat removal effi ciency of the cooling system radiator.Methodology and research methods. The static pressure created at diff erent fan speeds was defi ned at the radiator inlet and outlet in 32 points (16 on each side) using the air pressure probes. The pressure readings were recorded using a 64-channel pressure scanner.Scientifi c novelty and results. The paper deals with research into the infl uence of the distance between the fan and the cooling system radiator surface on the heat removal effi ciency by increasing of the airfl ow through the cooling system radiator. The results of the experiment to determine the optimal distance between the radiator and the fan for various rotational speeds are presented.Practical signifi cance. The value of the distance between the fan and the radiator was determined, which makes it possible to achieve an increase in the airfl ow through the radiator due to more uniform distribution of the airfl ow created by the fan mounted on the radiator casing over the radiator surface
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