Passenger cars - Steady-state circular driving behaviour - Open-loop test procedure

This technical specification outlines a standardized procedure for evaluating the steady-state circular driving behavior of passenger vehicles under open-loop test conditions. The methodology establishes a framework for conducting controlled maneuvers where the vehicle is driven along a constant radius path, allowing for the assessment of its inherent handling characteristics. Key parameters such as steering inputs, lateral acceleration, and yaw rate are measured and analyzed to determine the vehicle's response to sustained lateral forces. This approach facilitates a consistent comparison of handling dynamics across different models and manufacturers by adhering to defined test protocols and environmental requirements. The document details the necessary equipment, track specifications, and data acquisition techniques essential for performing these evaluations. It serves as a reference for engineers and testing facilities aiming to quantify stability and directional control during curved trajectories without closed-loop intervention. The guidelines ensure that results are reproducible and reliable, supporting the broader goals of vehicle safety and performance evaluation through rigorous experimental design.