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为了研究不同工况对同步器工作表面温度分布的影响,建立温升补偿的同步器换挡控制策略,对同步器摩擦对偶面进行了热-结构耦合特性分析。以传热学理论为基础,通过有限元软件建立同步器摩擦对偶面有限元分析模型,研究不同载荷和不同转速差下摩擦对偶面表面的温度分布。研究结果表明:在一定范围内,载荷和转速差与摩擦副表面的最高温度是线性关系;载荷每增加250 N,摩擦副表面最高温度升高5.8℃;转速差每增加200 r/min,摩擦副表面最高温度升高4.7℃。通过对不同工况下同步器摩擦对偶面温度场变化规律的分析,建立温升补偿的同步器换挡控制策略,对提高同步器换挡控制策略具有重要意义。
In order to study the effect of different working conditions on the temperature distribution of synchronizer working surface, a shift control strategy of synchronizer with temperature rise compensation was established to analyze the thermo-structural coupling characteristics of synchronizer friction dual surface. Based on the theory of heat transfer, finite element software was used to establish the finite element analysis model of the friction pair interface of the synchronizer, and the temperature distribution on the surface of the friction pair under different loads and speeds was studied. The results show that: in a certain range, the difference between load and speed is linear with the maximum temperature of the friction pair surface; the maximum temperature of friction pair surface increases by 5.8 ℃ for every 250 N increase; The maximum temperature of the secondary surface increased by 4.7 ℃. Through the analysis of the changing law of the temperature field of the synchronizer friction dual surface under different operating conditions, it is of great significance to improve the synchronizer shift control strategy for temperature rise compensation.