Pneumatic suspension is increasingly used in many cars. Control of a car body level is the main function of the pneumatic suspension. The experimental determination of the pneumatic spring characteristics suitable for the design and modeling of the car level control system is presented. The characteristics of the pneumatic spring are determined, that determine the quality of the control system. The effect of temperature changes inside the pneumatic spring is experimentally determined due to heat exchange on air pressure and vertical force during alignment of the car body. In addition, through modeling is evaluated by changing the level of the car body due to the impact of heat transfer. An original method of controlling the lifting and lowering of the vehicle body is proposed. The method is based on the energy balance and is the basis for reducing the number of strokes of the electropneumatic valve. The change in the level of the body due to the temperature effect is leveled due to the indirect consideration of this effect using the pressure sensor in the cylinder.
Problem. At the present stage of science and technique development the problem of creation energy efficient vehicles is solving by electric vehicle designing: electromobiles and hybrid vehicles. Despite perspectives of a batteries electric vehicles it could be complied with a “Zero Emissions” criterions only in case if the electricity is generated from renewable sources. In addition electric vehicle may not always provide the desired range on charge. Lithium-ion batteries are now used to power the electric drive, and important problem of that is a significant weight which vehicle have to carry, it is also necessary to balance their elements, which significantly increases the charging time from the external mains. Goal. The goal of the work is to develop the theoretical basis for the creation of a system for the conversion of the "mild hybrid" vehicles in operation. Methodology. Many countries cannot afford to make the rapid transition to renewable electricity and replace the fleet with electric vehicles. Instead, a faster effect can be obtained if you re-equip vehicles that are already in use in hybrids. To successfully fulfill this goal, it is necessary to justify the parameters of the hybridization system of vehicles in order to obtain significant energy efficiency with a favorable payback period. Results. The analysis of hybrid classification and drive architecture allowed to offer new functions for "micro hybrid" and "mild hybrid" technologies. Analysis of power losses on the movement of the vehicle allowed to predict the number and power of electric motors sufficient to perform new functions. Originality. The structural scheme of the hybridization system of the motor vehicle which provides its conversion into a hybrid is developed. The study is aimed primarily at improving the technology "mild hybrid" in which electric motors of relatively low power, which are not inherent in this technology, proposed a partial implementation of the functions inherent in the technology of "full hybrid". Practical value. The combination of the features of "micro hybrid" and "full hybrid" technologies in "mild hybrid" technology should provide sufficient energy efficiency, ease of installation of system equipment and low cost.
Research of control systems of vehicle transmission units is an important stage in the process of creating the latest developments in this area. One of the problems on the way to create and adapt to specific operating conditions of control systems of transmission units is an experimental studies of their operation, including as part of the vehicle. The main difficulty in conducting experimental research is often the high cost of the necessary equipment and the problems associated with the reproduction on a particular experimental stand of various operating conditions of the system. One of the solutions to this problem is the use of cyberphysical systems to test vehicle units and study their control systems. The purpose of the work is theoretical substantiation and practical creation of cyberphysical system, which allows to work out algorithms of control of transmission element in different operating conditions without need of its installation on real vehicle and consists of electropneumatic clutch control mechanism realized at physical level and model of vehicle transmission elements. The approaches adopted in the work to achieve this goal are based on the laws of physics, the main processes and phenomena reproduce and study by mathematical modeling. The research technique which allows to combine experimental methods with receptions of mathematical modeling is offered. The concept of cyberphysical modeling of complex devices and their control systems is presented. The process of transition from the physical to the model level of the cyberphysical system is described, the software and hardware means for its realization are offered. The study of the created cyberphysical system and the comparison of the obtained results with the experimental data of the study of the electropneumatic clutch control drive allowed to draw a conclusion about the possibility of using the proposed approach to test vehicle units. The proposed approaches and the given material and technical base can be used in the design of new and research of previously created units and systems of vehicles. Keywords: cyberphysical model, pneumatic cylinder, DC motor, Arduino, solenoid valve, angle of rotation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.