Analysis on pressure during door closure considering air tightness

• 1、State Key Laboratory for Advance Design and Manufacturing of Vehicle Body, Hunan University, Changsha, 410082

Abstract：A large amount of gas enters the passenger compartment during door closing, resulting in an instantaneous increase in the pressure inside the vehicle, which greatly affects the customer\'s ride comfort. This problem is more prominent in the vehicles with high sealing performance. Therefore, it is important to accurately simulate the pressure during door closing and design the pressure relief valve reasonably. Relevant scholars have conducted a simulation analysis of this process, but they are all aimed at a simplified model and don\'t consider the vehicle\'s air tightness. This paper presents a detailed modeling method for the vehicle door closing process. First of all, the vehicle\'s tightness is simulated, and the accuracy of the model is verified through experiments, and then used to simulate the dynamic closing process of the vehicle door. Taking a small electric vehicle as an example, on the basis of meeting the vehicle\'s tightness, the pressure changing and flow field during door closing is analyzed and combining experiment to discuss the accuracy of the model. At last, the resistance characteristic, area, and location of the pressure relief valve which can influence the pressure inside the car is studied.

Keywords： Vehicle Engineering；Air tightness Door closure Pressure Pressure relief valve(PRV)