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2016-12-05 ...
  • December 5, 2016 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
This seminar provides an introduction to several critical aspects of heavy truck dynamics. The comprehensive presentation and discussion will begin with the mechanics and dynamics of heavy truck tires, followed by steering dynamics, and finally moves participants into suspension kinematics and dynamics. Starting at the ground and moving up, this seminar explores the important dynamic aspects of each subsystem and how each is related to the overall truck dynamics.
2016-06-14 ...
  • June 14, 2016 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
One of the most important safety critical components on cars, trucks, and aircraft is the pneumatic tire. Vehicle tires primarily control stopping distances on wet and dry roads or runways and strongly influence over-steer/under-steer behavior in handling maneuvers of cars and trucks. The inflated tire-wheel assembly also acts as a pressure vessel that releases a large amount of energy when catastrophically deflated. The tire can also serve as a fulcrum, both directly and indirectly, in contributing to vehicle rollover. This seminar covers these facets of tire safety phenomena.
2016-06-13 ...
  • June 13, 2016 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
The principal functions of the pneumatic tire are to generate driving, braking, and cornering forces while safely carrying the vehicle load and providing adequate levels of ride comfort. This seminar explains how tire forces and moments are generated under different operating and service conditions and, in turn, demonstrates how these forces and moments influence various vehicle responses such as braking, handling, ride, and high-speed performance. The content focuses on the fundamentals of tire behavior in automobiles, trucks, and farm tractors, but also includes experimental and empirical results, when necessary.
2016-04-14
Event
Focusing on tire and terrain mechanics modeling for load simulations, tire model development, parameters identification, and sensitivity analyses, tire test development, road profile characterization, effective road profile development, and interactions between tire, suspension/steering/brake systems, and different terrains, spindle loads/travel variation characteristics from deterministic and rough roads, terramechanics, tire noise, rolling resistance and correlation studies.
2016-04-12
Event
The aim of this symposium is to provide a forum to bring together researchers do discuss and disseminate the research on tire and wheel technology. Examples of topics to this symposium include (but are not limited to) nonlinear behavior of tires and wheels, static/dynamic stress analysis, nonlinear material modeling, contact stress, impact, noise, vibration, traction, hydroplaning, effect of tires on vehicle performance, rolling resistance, and durability.
2016-04-12
Event
The aim of this symposium is to provide a forum to bring together researchers do discuss and disseminate the research on tire and wheel technology. Examples of topics to this symposium include (but are not limited to) nonlinear behavior of tires and wheels, static/dynamic stress analysis, nonlinear material modeling, contact stress, impact, noise, vibration, traction, hydroplaning, effect of tires on vehicle performance, rolling resistance, and durability.
2016-04-05
Technical Paper
2016-01-0447
Manfred Baecker, Axel Gallrein, Francesco Calabrese, Remco Mansvelders
A sudden pressure loss can lead to an instability of the car. This instability can lead - without aid of systems such as e.g. Electronic Stability Control (ESC) - to an emergency situation, possibly resulting in an accident. But also with an ESC system such a situation is an unusual application case, because the vehicle system (car+tires) properties change very rapidly, resulting in a highly dynamic response of the system and moreover to a fuzzy and unclear description of the vehicle system. From this point of view, a proper validation and verification of an ESC system for such an application seems to have a big safety relevance. The authors have set up a simulation case to simulate a sudden tire inflation pressure loss and its consequences to the car stability. Using this simulation setup enables a CAE engineer to pre-develop ESC systems and/or to validate and test these systems for a realistic and relevant use case.
2016-04-05
Technical Paper
2016-01-0446
Chen liang, Guolin Wang, Zhou Zheng
A three-dimensional finite element model of radial tire 205/55R16,established by ABAQUS software,is used to simulate tire force and moment properties. Drum tests are designed to validate the simulation model’s reliability. To investigate the impacts of PCR contour design theory on tire force and moment, a modified string balance contour theory is presented, based on string balance contour theory, which simplifies the belts pressure share ratio as trapezium. And a program for calculating tire’s contour is compiled. Different tire contours are designed according to different belt pressure share ratios. One of the contours is selected according to the positive affect to cornering stiffness. Compare the selected newly designed tire with the original one, it is found that the newly designed tire’s contact area, longitudinal stiffness,lateral stiffness,camber stiffness and cornering stiffness increase while its radial stiffness decreases.
2016-04-05
Technical Paper
2016-01-1570
Xin Gao
When heavy truck is traveling in high speed or braking urgently, the tire will produce heat due to the friction with ground and absorb heat from high-heat environment to rise the inside pressure, which may run the risk of a flat tire. To make sure the characters of tire, it’s inadequacy to transform tire property as the point of departure. Based on the way of enhanced heat transfer, the tire pressure control system designed by this article is mainly increasing heat loss through convection. Using air flow direction around tire during driving and combining the deflector set on wheel hub retards air flow around tire. So tire temperature is reduced by means of heat exchanged fully.Firstly, theoretical calculation on pressure characteristic inside tire is carried out. Combining upwind flow field by using relevant software, Simulation analysis on tire pressure is done. According to the results of simulation and theoretical calculation, confirmatory experiments are designed.
2016-04-05
Technical Paper
2016-01-1565
Joydeep Banerjee, John McPhee
Dynamic modelling of the contact between the tires of automobiles and the road surface is crucial for accurate and effective vehicle dynamic simulation and the development of various driving controllers. Furthermore, an accurate prediction of the rolling resistance is needed for power management controllers designed to reduce fuel consumption and engine emissions. Tire models generally need to account for the deflection in the tread, deflection and deformation of the carcass, and the frictional interaction between the tire and the road. Existing models of tires include physics-based analytical models (e.g., brush models, flexible beam models, stretched string model etc.), finite element based models, black box models, and data-driven empirical models (e.g., magic formula model). The main issue with these approaches is that none of these models offer the balance between accuracy of simulation and computational cost that is required for the model-based development cycles.
2016-04-05
Technical Paper
2016-01-1566
Liangyao Yu, Xiaoxue Liu, Kefeng Yang, Xiaohui Liu, Shuhao Huo
This paper focuses on reviewing the existing studies of in-tire energy harvesting systems. Energy harvesting systems are widely applied in different areas. But studies in the application of energy harvesters embedded in tires for vehicle control are still rare, most of which focus on solving the problem of power supply of tire pressure sensors. Traditionally the sensors are powered by an embedded battery, which must be changed periodically due to the limited energy storage. Furthermore, the number of in-tire sensors will increase as safety of vehicles has drawn more attention, requiring more in tire electricity supply. So a substitution of the battery, the in-tire energy harvesting system, is worth studying. Currently introduced methods of in-tire energy harvesting principles include piezoelectric, electromagnetic and electrostatic. The source of the energy can be in tire vibration, deformation, rotation and so on.
2016-04-05
Technical Paper
2016-01-1568
L. Daniel Metz
Roadway tractive capabilities are an important factor in acci-dent reconstruction. In the absence of full-scale experiments, tire/road coefficient of friction values are sometimes quoted from reference textbooks. For the various types of road con-struction, the values are given only in the form of a wide range. One common roadway type is oil-and-chip construction. We examine stopping distances for newly-rocked oil-and-chip roads vs. similarly constructed roads that have been traffic- polished. The examination was conducted through full-scale braking experiments with instrumented vehicles. Results show that the differences between newly-rocked oil-and-chip roads when compared to roads that are traffic-polished are on the same order as vehicle, tire and ABS algorithm differences, and that full-scale testing is required for accurate μ-values.
2016-04-05
Technical Paper
2016-01-1635
Donald F. Tandy, Jung Bae, Jason Colborn, Clay Coleman
Recreational Off-Road Vehicles (ROVs) or side-by-sides have increased in popularity as they are available in many different sizes and performance characteristics from a host of manufacturers. The U.S. Federal Government, through the Consumer Product Safety Commission, is proposing a vehicle handling and a rollover resistance test for these vehicles. For the sake of repeatability, the proposed maneuvers are to be performed on a hard paved surface as opposed to the off road surfaces (i.e. grass, sand, dirt, mud. rocks, etc.) that these vehicles are designed to be operated on. Since ROV tires are designed for off road use only, their performance on an asphalt or concrete surface has not been studied in depth. This paper discusses a tire study conducted on a MTS Flat Trac II tire machine where forces and moments where measured at various speeds with a ROV tire. Repeated runs were made to look at how the tire performance characteristics change as they wear.
2016-04-05
Technical Paper
2016-01-1571
Harsh Patel, Michael Casino, David Noakes, Nicholas Kauffman, Daniel Rohwedder, Jugal Popat, Aneesh Nabar, Peter Thomas Tkacik
This paper is part of a bigger research effort that includes hundreds of passenger vehicle wheel alignment measurements and a design of experiments that works to capture the various factors. Of the many things that influence the accuracy and repeatability of vehicle suspension alignment measurement and adjustment, the design of the suspension can be the most significant. This includes but is not limited to adjustment configuration, suspension design, static alignment settings, and bushing stiffness. Measurements were using a Hunter Pro-Align with DSP700 wheel sensors in the Motorsports Research Building at the University of North Carolina at Charlotte. All vehicles were reviewed and any with suspension damage were rejected prior to measurement. The collection of vehicles measured included the category of small front wheel drive, full size rear drive, seven passenger SUV, sports car, and race car. A small sporty sedan was also tested and modified to assess bushing stiffness influence.
2016-04-05
Technical Paper
2016-01-1572
Jugal Popat, Aneesh Nabar, Meighan Read, Chen Fu, Chunhui Zhang, Galab Kausik, Harsh Patel, Peter Thomas Tkacik
Public information is seriously lacking on studies of something so critical to safety as passenger vehicle tire pressures. This paper is the result of measurements on hundreds of vehicles and the most surprising results are presented regarding the influence of tire pressure monitoring systems (TPMS) and the new trend toward spare tire locations and use. Gathering this data is notoriously difficult due to the psychological hurdles involved in gaining access to a trunk that is typically embarrassingly cluttered and the time required to measure a tire buried under floor boards. One key observation is that spare tires are often left unchecked or overlooked in between regular vehicle maintenance resulting in safety issues for drivers. The vehicles sampled ranged from full-sized pick-up trucks to compact cars. The study included vehicle model years from 1965 to 2015 (50 year range).
2016-04-05
Technical Paper
2016-01-0460
Salem A. Haggag, Abraham Mansouri PhD
The control of automotive braking systems performance and wheel slip is a challenging problem due to the nonlinear of the braking process, vehicle body dynamics during braking and the tire-road interaction. When the wheel slip is not between the optimal limits during braking, the desired tire-friction force cannot be achieved, which influences the braking distance, the loss in steerability and maneuverability of the vehicle. A simple and in the same time realistic vehicle longitudinal braking model is essential for such challenging problem. In this paper, a new longitudinal rolling/braking lumped-vehicle model that takes vehicle aerodynamic forces in consideration is presented. The proposed model takes the rolling resistance force, the braking force and the aerodynamic lift and drag forces in consideration and investigates their impact on the vehicle longitudinal dynamics especially vehicle braking stopping distance and time.
2016-04-05
Technical Paper
2016-01-1634
A tire is one of the most important performance and safety components in a two wheeler. An incorrect tire pressure not only impacts overall performance of a vehicle but also safety and overall fuel economy. The main purpose for appropriate tire pressure is to uniformly distribute vehicle load across the tire contact patch thereby providing an optimal contact between tire and road, effective handling, passenger comfort, maximum tire life and overall vehicle safety. A Tire Pressure Monitoring System (TPMS) measures a range of air pressure and alerts for proper tire pressure maintenance. Currently fully fledged tire pressure sensing systems are used in passenger cars and commercial vehicles, the use of such system in a two wheeler is yet to be recognized as precondition instead of an added attribute.
2016-04-05
Technical Paper
2016-01-1308
Kristian Lee Lardner, Moustafa El-Gindy, Fredrik Oijer, Inge Johansson, David Philipps
The handling and comfort characteristics of a vehicle are greatly impacted by the tire harmonics and these harmonics are known to be affected by several other external and internal parameters. The first mode of vibration is instigated by the tire moving in the vertical direction. This movement is typical of a tire when it drives over obstacles such as pot holes, or speed bumps over a road profile. More importantly, the force that occurs at the first harmonic is transmitted through the tire spindle to the rim, tire axle, and chassis of the vehicle directly affecting the handling and comfortability of the vehicle which is an important factor for trucks and tractor trailers involving heavy and expensive cargo. The purpose of this study is to determine the effect of tire operating conditions, such as the inflation pressure, speed, and load on the change of frequency of the first mode of vibration.
2016-04-05
Technical Paper
2016-01-0445
Brian Paul Wiegand
Evaluation of the performance potential of an automotive conceptual design requires some initial quantitative estimate of numerous relevant parameters. Such parameters include the vehicle mass properties, frontal and plan areas, aero drag and lift coefficients, available horsepower and torque, and various tire characteristics such as the rolling resistance... A number of rolling resistance models have been advanced since Robert William Thomson first patented the pneumatic rubber tire in 1845, most of them developed in the twentieth century. Most early models only crudely approximate tire rolling resistance behavior over a limited range of operation, while the latest models overcome those limitations but often at the expense of extreme complexity requiring significant computer resources.
2016-04-05
Technical Paper
2016-01-1569
Kiho Yum
In this research, the influence of tire force and moment (F&M) characteristics on vehicle on-center steering performance was analyzed and then how to improve vehicle on-center performance was studied through controlling tire structure design parameter and tire tread grip characteristics. First, the relationship between vehicle on-center steering performance and tire F&M characteristics was identified by comparing vehicle steering measurement and tire F&M measurement. It was found that on-center steering performance is improved as the aligning torque at slip angle 1° increases. Secondly the influence of tire structure design parameter on tire aligning torque was studied by tire F&M finite element analysis. It was also found aligning torque increases as tire tread and sidewall stiffness decreases. However it shows trade-off characteristics with tire cornering force stiffness so it is necessary to optimize cornering force stiffness and aligning torque stiffness.
2016-04-05 ...
  • April 5-6, 2016 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
This course provides a detailed description of tire failure modes, their potential causes, identification, and the sometimes subtle nuances that go along with determination of tire failure. In addition, proper inspection techniques of tires will be discussed and samples will be available to reinforce the concepts learned. The book, Tire Forensic Investigation, authored by the instructor, is included with the course materials. This course has been approved by the Accreditation Commission for Traffic Accident Reconstruction (ACTAR) for 13 Continuing Education Units (CEUs).
2016-04-04 ...
  • April 4, 2016 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
This course provides an introduction to basic tire mechanics, including materials, sidewall stampings, pressure, tread patterns, tire inspection and basic tire failure identification of passenger and light truck tires. Practical in nature and supplemented with samples and hands-on activities, the course will provide you with information that you can use immediately on-the-job and apply to your own vehicle. It serves as a good primer for the in-depth SAE Tire Forensic Analysis course. This course has been approved by the Accreditation Commission for Traffic Accident Reconstruction (ACTAR) for 7 Continuing Education Units (CEUs).
2016-03-29
Event
2016-01-26
WIP Standard
J1981
The test is designed to evaluate the frontal impact resistance of wheel and tire assemblies used with passenger cars, light trucks and multi-purpose vehicles. The test is specifically related to vehicle pothole tests that are undertaken by most vehicle manufacturers. The scope has been expanded to allow the use of a striker that can be angled to preferentially impact the inboard and outboard wheel flange. For side impact of the outboard rim flange only, please refer to SAE J175. This SAE Recommended Practice provides a procedure to test a wheel or a tire and the test failure critiera. The specific test for a vehicle requires input from a pothole test on that vehicle to establish the drop height of the striker used in this test.
2016-01-22
Event
This session will cover tire improvements on LD and HD vehicles. Topics may include: Fuel economy improvements in reduced rolling resistance from new rubber formulations, reduced air losses with barrier coatings, air maintenance tire technologies, industries’ experience with these technologies and NHTSA and EPA’s tire testing programs.
Viewing 1 to 30 of 2844

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