Experimental investigation and theoretical modeling of a dynamic function vehicle tire air control valve

This study comprehensively investigates the pressure-time characteristics of a dynamic-function tire valve through both experimental and theoretical approaches. Systematic tests conducted on tanks with volumes ranging from 7.5 to 60 L were used to characterize the valve's performance during both filling and discharge processes. Based on the International Organization for Standardization (ISO) 6358 standard, an advanced theoretical model was developed. The main contribution of the study is the development and validation of a single coefficient that simplifies valve modelling by accounting for tank volume effects. Using exponential functions derived from extensive experimental data, a simplified yet highly accurate modelling methodology is proposed. This innovative approach replaces complex multi-parameter models with a single volume-dependent coefficient (k), significantly simplifying calculations while maintaining high accuracy and offering practical solutions for engineering applications. The experimental results align well with the theoretical model. During filling processes, it was observed that the model slightly overestimates the pressure at the initial stage, but overall provides reliable results. Additionally, it was found that the discharge coefficient and sonic conductance values decrease as the tank volume increases, indicating higher efficiency in systems with smaller tanks. The findings offer valuable insights for industrial applications such as Central Tire Inflation Systems (CTIS). Future research may explore the application of this approach to different valve types and systems, potentially contributing to the establishment of a new standard in pneumatic system modelling.