Papers by Keyword: Automobile

Abstract: The interest around the additive manufacturing is increasing, with more and more solutions at both the industrial and desktop levels. As this is still a relatively recent issue for several industrial areas, there is a clear opportunity to explore in order to optimize the systems in the face of the needs of these same industries, and with increasing times, there are increasing factors to take into ac- count in initial phases of new product development. Presently, there is also a growing ecological awareness, with the concern of implementing a logic of waste reduction and implementation of the circular economy in new products with a view to the valuation of new alternative materials. With the development of solutions aimed at the optimization and feasibility of large additive manufacturing systems, the introduction of new alternative materials will be a reality, presenting in this article a solution and methodology for future tests for new materials. Thus, herein is studied a way of responding to both problems, new ecological materials and BAAM system optimization, presented through a hybrid and flexible solution based on the Pin Bed Forming principle applied to Big Area Additive Manufacturing systems.

Abstract: The paper deals with design, modeling, and dynamic analysis of an integral (4-wheel) steering system for 2-axle cars. The study is focused on the steering box of the rear wheels, which is based on cam - follower mechanism. In the proposed concept, the integral steering intends to improve the stability and handling of the vehicle by considering the integral steering law, which is formulated in terms of correlation between the steering angles of the front and rear wheels. In this regard, a double-profiled cam is designed, whose profile dictates the translational movement of the follower, which is connected to the rear left and right steering tie-rods. The dynamic modeling and simulation of the 4-wheel steering vehicle was performed by using the MBS software package ADAMS. The results of the dynamic tests demonstrate the handling and stability performances of the proposed system, in relation with a classical 2-wheel steering vehicle.

Abstract: Process planning is the key sector for automobile industry enterprises to shorten product development cycle. By studying the expression method of process information and standardized description method of process knowledge based on MBD, the process knowledge base is established with the uniform representation model as the core, on this basis, the knowledge embedding method oriented to process planning task, modeling method of process planning wizard and process planning navigation technology is studied, the maintenance and application platform of the process knowledge for the automobile industry is established, and integrated with the existing CAPP system, to realize the whole-process management of processes knowledge, so as to provide the support for the optimization and improvement of the manufacturing process.

Abstract: This study focused on the evaluation of TiO₂ nanofluid coolant for automobile engine cooling applications. It was observed that, about 3% of thermal conductivity enhancement and above 10% convective heat transfer enhancement could be achieved with the usage of 1.0 wt.% TiO₂ nanofluid coolant compared to base coolant without nanoparticles. More importantly, corrosion-inhibiting properties of TiO₂ nanofluid coolant were investigated, which indicated that the nanofluid coolant possess the characteristics of a qualified engine coolant should have. The evaluation results showed that the nanofluid coolant could be a promising engine coolant for automobiles.

Abstract: Mg alloy is a potential material to be used in automobile, especially in the stamping products. Through texture weakening, temperature increasing, strain rate decreasing, blank holder force controlling, lubrication choosing and so on, the formability of AZ31 magnesium alloy is improved so that the cold stamping on some simple products can be conducted. However, on the complicated products, hot stamping should be considered. Temperature has an important effect on the formability of Mg alloy sheet. As the temperature increasing, the strength of Mg alloys sheet decreases while the formability increases. Hot stamping process is an effective way to broaden the using of Mg alloys.

Abstract: In the disposition of energetically economic houses, automobile abandons its stereotype held for so many years according to which it was placed to rest “under one roof” with other residential and utility rooms. However, this diagram shows a range of collisions manifesting with difficult building details, with occurrence of thermal bridges and thermal relations. This results in increased financial demands for drafting efficient thermal insulation layers or higher demand for energy consumption necessary to heat up the building. Generally, architects and structural engineers are not sufficiently aware of the fact that at the same time this is a factor that provides higher potential for faster ageing of car bodies and chassis when cars are parked “inside the house” than in means of transport parked in open carports or in an open space. This Paper deals with analyses of this important, yet often omitted or less-known fact.

Abstract: Recently, wireless energy transfer techniques are being developed for hybrid (HEV) or electric (EV) vehicles. However, without taking any measures, magnetic field strength around energy transfer systems that employ solenoid type antennas is known to exceed regulated values in most countries. In this study, the application of magnetic sheets, which are widely used as EMC components, is proposed to suppress the magnetic field leakage from an automobile energy transfer system and the ability of magnetic leakage suppression with the magnetic sheet has been evaluated by means of electromagnetic simulation. Through these investigations, desirable system arrangements are discussed. As a result, if combined with a metal plate, non-conductive magnetic materials having large permeability has been found to be preferable.

Abstract: This paper is to present a fault diagnosis method for electrical control system of automobile based on support vector machine. We collect the common fault states of electrical control system of automobile to analyze the fault diagnosis ability of electrical control system of automobile based on support vector machine. It can be seen that the accuracy of fault diagnosis for electrical control system of automobile by support vector machine is 92.31%; and the accuracy of fault diagnosis for electrical control system of automobile by BP neural network is 80.77%. The experimental results show that the accuracy of fault diagnosis for electrical control system of automobile of support vector machine is higher than that of BP neural network.

Abstract: Vehicle braking system in vehicle security plays an important role.In recent years, with the progress of vehicle technology and improvement of the car speed, the rapid development of electronic technology provides a more broad space of development to the braking system. Based on the use of electronic technology in automobile braking system present situation as the research object, the application of electronic technology in automobile braking system has carried on the detailed exploration and research, to promote the further study of electronic technology in automobile braking system and the application.

Abstract: Large sag due to heavy weight of the propeller shaft is a major cause of rotating vibration, so that to use the hollow shaft is an effective way to reduce the weight. Many scholars and engineers ignored that the outer and inner diameter are discrete and integer variables in optimization design of the propeller shaft. The practicability of an optimal solution is affected by decimal value of the diameter. A practical reliability optimization model with discrete and integer variable of the propeller shaft is proposed, and “Solver” in Microsoft Excel is used to seek the solution of optimization design. The reliability optimization model is composed of minimum weight objective function and constraint conditions such as torsional strength reliability, torsional stiffness reliability, critical speed, torsional stability, manufacturing process, etc. Design results show that the reliability optimization model with integer and variable of propeller shaft and the solving method with “Solver” in Microsoft Excel are more reliable and efficient.