# 3835 / Effect of steer angle rate upon tyre lateral force generation on two different soils Title: Effect of steer angle rate upon tyre lateral force generation on two different soils Authors: Dawid Tatarynow, Michał Kuszneruk, Piotr Budzyński, Jarosław Pytka, and Paweł Tomiło Abstract: The mechanism of formation and the characteristics of the tyre lateral force play an important role in terms of driving dynamics, safety and comfort. In the case of an off-road vehicle, the generation of tyre lateral force is, among others, dependent on the soil. The effects of the three-phase nature of the soil medium may cause the characteristics of the lateral force build-up to be degressive or progressive. Experimental research was undertaken to determine tyre lateral force on the steered wheel of the Suzuki Vitara off-road vehicle driven on loess and sandy soil as well as on wet snow. The vehicle was equipped with rotating wheel dynamometers and a steering robot. The measurement of the lateral force was carried out for three values of the steer angle rate, δ: 100, 500 and 1500 deg/sec. Based on the obtained results, FY(δ) characteristics were obtained and further analyzed in order to determine the mathematical function describing the investigated mechanism of tyre – soil interaction. Order the full paper: ISTVS members: receive three papers per year as part of your membership via the ISTVS Member Portal: --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://2023.istvs.org/submissions/papers/3835.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.