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满载中型货车在连续长下坡行驶过程中,需要采取频繁制动来保证行车安全,往往面临制动性能热衰退的现象,严重时甚至会出现制动失效。本文基于满载中型货车台架试验,模拟满载中型货车长下坡路段的制动过程,采集不同初始速度下制动过程的摩擦片表面、制动蹄顶部及制动蹄内侧制动器三个位置的温度变化过程详细数据,运用Table Curve3D软件将试验数据进行拟合分析,得出了长下坡路段满载中型货车制动片热衰退变化趋势,得到了长下坡路段满载中型货车制动器制动热衰退的拟合模型,运用模型对满载中型货车的制动器制动衰退率大于25%时,及时的进行预警,防止制动失效引发交通事故。
In the process of continuous long downhill driving, full-loaded medium-sized trucks need to take frequent braking to ensure driving safety and are often faced with the phenomenon of hot recession of braking performance. In severe cases, braking failure may even occur. This paper simulates the braking process of the full-length mid-size truck with long downhill sections based on the full-load mid-size truck bench test. The changes of the temperature at the three positions of the friction plate surface, the top of the brake shoe and the brake inside the brake shoe under different initial speeds The detailed data of the process and the curve fitting of the test data by using Table Curve3D software show that the hot decay tendency of the brake shoe full loaded with mid-sized truck on the long downhill is obtained, and the fitting model , The use of models for full load truck brake braking recession rate greater than 25%, the timely warning, to prevent brake failure caused by traffic accidents.