关键词: 双抗扭拉杆悬置；热害问题；仿真优化；V 型导流结构；气坝

Abstract: Aiming at the thermal damage problem of a plug-in hybrid electric vehicle (PHEV) double torsion rod suspension, STAR-CCM+ and TAITherm software are used for coupling simulation to obtain the temperature field of the double torsion rod suspension, and the causes of overheating are analyzed. Then an optimal scheme of engine room bottom protection plate with V-shaped flow guide structure is proposed, and the influence of the angle of flow guide gas dam on the ambient temperature of double torsion rod suspension bushing is analyzed. The simulation results show that the optimized scheme can better direct the low-temperature air flow outside the vehicle into the designated position of the engine room through the gas dam and V-shaped diversion structure, reduce the temperature field of the double torsion rod suspension and the surrounding area, and meet the temperature resistance requirement of the ambient temperature ≤90 ℃. Finally, the optimization scheme is installed on the real vehicle and the whole vehicle test is carried out to verify. The collected test results are compared with the simulation results, and the relative error is only 3.1%, which proved that the simulation analysis had good accuracy and reliability, and finally successfully solved the thermal damage problem of the double-torsion suspension.

Key words: GAC Automotive Engineering Institute