CAE Prediction of Tire Dynamics with Tread Patterns

Yoichi Mie (Sumitomo Rubber Industries)

Tire patterns significantly influence braking and cornering performance. However, the constantly changing contact patch poses challenges for conventional CAE analysis. To overcome this, we developed a novel dynamic characteristic prediction method for tires using explicit CAE. This method effectively captures the tire's dynamic behavior by representing the continuous changes in contact shape. This presentation will detail the developed method and present results, including contact pressure and stress distributions obtained from the analysis.

Development of a Tire Force Estimation Technique Based on a Four-Wheel Vehicle Model Using the Extended Kalman Filter

SHOTA KITANO･HIDEKI ITOGA･TAKANORI HIBINO･KAZUKI KUWABARA (ToyotaMotorCorporation)

This study aims to achieve high-accuracy virtual sensing of tire forces using an extended Kalman filter with a four-wheel vehicle model. By incorporating suspension K&C characteristics and load transfer due to roll, and applying a Combined Model to the tires, the method achieves estimation accuracy comparable to existing measurement devices.

Improvement of Road Friction Measurement System and Application to Various Road Surfaces

Ichiro Kageyama (Consortium on Advanced Road-Friction Database)･Atsushi Watanabe･Yukiyo Kuriyagawa･Tetsunori Haraguchi (Nihon University)･Tetsuya Kaneko (Oosaka Sangyo University)･Minoru Nishio (Absolute)

We have developed a continuous road friction measurement system based on its contribution to road traffic safety. To improve the reliability of the results and the efficiency of the experiment, we have modified the design of the measurement system, and we present the results of a characteristic measurement experiment on a test course. Next, we conduct μ-s characteristics measurement experiments on various road surfaces with different friction, confirm the accuracy, and propose an analysis method to improve the accuracy.

Development of Visual Analysis Approaches for the Contact Phenomenon Between Tires and Real Road Surfaces

Naohiro Ishigami･Naoki Isayama (Toyo Tire Corporation)

Tire performances are significantly influenced by the contact conditions with the road surface. However, visualizing this contact on uneven asphalt surfaces in real-world scenarios is challenging, leading to the common practice of using flat transparent plates for tire contact evaluation. However, there is a significant difference in contact behavior between flat plates and actual uneven road surfaces. In this study, we developed a method to visualize the contact state of real tires using replica road surfaces that replicate the shape of actual road surfaces with transparent materials. This presentation will introduce the experimental methodology and the results obtained.