Papers by Keyword: Tire

Abstract: The internal high temperature of tire not only reduces the service life of the tire, but also increases fuel consumption. An on-line monitoring system of temperature field in tire is designed. The temperature measurement module of lower computer is made up of temperature measurement network of thermocouple, single chip microcomputer and other modules. The upper computer software is designed under the environment of VC ++, making use of the serial port to realize communication. The functions such as temperature collection, analysis, display and storage capabilities were realized. The system has the advantages of convenient use, reliable operation, solving the difficult problem of obtaining tire actual temperature.

Abstract: To analyze the steady-state temperature field, a three-factor orthogonal test was taken to study comprehensively how the load, speed and tire pressure can influence the tire temperature. The finite element simulation was carried out according to the uncoupled idea. Based on the single-factor analysis towards the speed factor, the actual convection coefficient of different boundaries was determined to calculate the steady-state temperature field at last. These analyses indicate that the tire temperature rise increase with the factor of load and speed, decrease with the increase of the initial tire pressure. The load has the biggest influence on the tire temperature rise, while the speed has the least. With the combination of steady-state temperature field and heat generation rate distribution, all these high-temperature regions can be explained clearly from the finite element perspective.

Abstract: Safe driving requires from the driver several visual-mental activities (perception, Proper selection of the tires depending on the season allows for optimizing the level of risk associated with driving in varying weather conditions. Properties tires used in the vehicle operational parameters show variability of depending on temperature, leading consequently to change the characteristics of the traction of the vehicle. Understanding the nature of these relationships is essential to determine the nature interaction. tires and road surface This paper presents experimental results hardness of tires under normal traffic using a mobile measuring equipment.

Abstract: Safe driving requires from the driver several visual-mental activities (perception, recognition and decide) and manual activities relating to the implementation of specific movements. Vehicle responding to the given force is subjected a three axial loads that are transferred through the frictional coupling of tire and pavement Generated during the movement, in particular, curvilinear, lateral drift forces act directly on the tire tread and indirectly by steering to the driver. The value of these forces depends on the angle of the lateral drift, motion parameters and surface type. The paper presents results of experimental determination of lateral forces on the drift the running machine with five-component hub.

Abstract: Rotary Wheel is important component of the tire testing machine. The natural frequency of the wheel will be determine by it's structure, and these concern the performance of the tire testing machine. Through model analysis a reasonable structural style of the wheel was determined. Dynamic property of the wheel affected by structural parameters was also discussed in the paper. From the Analysis above reasonable parameters of the wheel were determined and sufficient natural frequency was ensured.

Abstract: A new type of tire testing machine is put forward. Various road surfaces can be imitated by this machine. The highest speed per hour is 250kM/h. Through finite element analysis the frame of the machine satisfy the design requirements in the aspect of strength and flexibility. Dynamics analysis demonstrate that the frame's natural frequencys are more than 90Hz. In this way covibration can be avoided effectively. The each rank amplitude are less than 10μm, this value is within allowed band.

Abstract: Rolling resistance can impact on the fuel economy and dynamics of automobile. Numerical simulation can predict the rolling resistance and reduce the experimental cost. So, a simulation model was established base on ANSYS to compute the rolling resistance. Firstly, the 3D model finite element model of a radial tire was setup to solve the strain and stress of a rolling tire. Secondly ,the temperature field of tire was analyzed in line with the analytical result of the strain and stress. Thirdly, the rolling energy loss was calculated to solve the rolling resistance. The simulation method is conducive to the structural design of tire and computation or prediction of the rolling resistance of tire.

Abstract: Because the brake and turn of automobile is completed by transmitting the force and torque to the ground through the tire, tires can influence the handling and stability of automobile. The impact of the unloaded radius of tire on the handling and stability of automobile was studied on the basis of ADAMS/CAR in this paper. The unloaded radius of tire was only changed and other parameters remain unchanged, then full vehicle analysis was carried out to get the simulation curves. The impact of the unloaded radius of tires on the handling and stability of automobile was obtained from the curve of simulation. The results of simulation are conducive to designing the shape and dimension of tires.

Abstract: The optimum curing times for rubbers used at various parts of a tire are measured under different temperatures. The sulfurization reaction activation energies for various kinds of rubbers are obtained based on Arrhenius’ law and the equivalent tire curing time and curing degree are calculated with or without taking post-valcanization effect into consideration. It Is found the post-valcanization effect has significant effect on the rubber curing degree and therefore can not be ignored. Attentions have to be paid on the post-valcanization effect for quality and efficiency enhancement of tire production.

Abstract: As one index of product certification for vehicle tire, rolling resistance is difficult to measure. In order to evaluate feasibility of two test schemes for tire rolling resistance measuring equipment, a new approach to study rolling resistance was developed with displacement deformation. Establishment process of finite element testing model was introduced briefly. Using two test schemes separately, simulation analysis and numerical computation of tire rolling resistance were conducted by controlling the experimental parameters. The comparison results showed that angle test method was reasonable and displacement field response to load was good under different working conditions. Subsequently, change trends of simulation results and experimental data were contrasted. They all indicated that tire rolling resistance added as the load enhanced and the obtained conclusion was consistent with related theories. It was validated that angle test scheme was feasible for equipment development.