某车型涡轮增压执行器及接插件热害问题研究

Study on Thermal Protection of Turbo Actuator PWM and Connector for a Car

基于CFD流固耦合瞬态分析对某反置式发动机车辆的涡轮增压电子执行器及接插件热害问题进行整车及机舱热管理,通过优化发动机装饰罩的引流结构、优化涡轮增压器隔热罩的形状、改变风扇停机延时策略三种优化方案来降低涡轮增压电子执行器及接插件的温度,并在实车上进行试验验证。仿真和试验结果表明,仿真结果与试验结果吻合较好,综合三种优化方案可满足设计需求,最终解决了执行器和接插件超温问题。

Thermal management is done for turbo actuator PWM and connector of vehicle with rear-mounted engine by implementing transient Co-simulation of fluid and solid.Simulation results show that turbo actuator PWM and connector can be cooled down by optimizing the spoiler on engine trim cover,or by optimizing the shape of turbocharger’s heat shield,or by optimizing the working logic of cooling fan,these simulation results are validated by corresponding test.The optimization of combined three proposals is finally implemented to protect turbo actuator PWM and connector from overheating.