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为了研究在道路长大下坡上载重货车制动器热衰减的温度曲线,应用能量守恒理论建立了载重货车在发动机制动和排气制动时制动器温度预测模型。通过在高速公路长大下坡路段进行制动器测温试验,得到了制动器在不同制动方式、载重时的连续升温数据和连续上坡时的连续降温数据;同时通过室内台架试验,得到了载重货车发动机功率曲线。最后通过试验数据检验,对模型中部分参数,如初始温度、环境温度等进行了修正。研究结果表明,货车荷载、下坡坡长、坡度、运行车速是影响制动器温度的主要因素,模型为高速公路长大下坡安全研究提供了一定的理论基础。
In order to study the temperature profile of the thermal attenuation of truck wagons on the long downhill road, a model of predicting the temperature of the truck brakes during engine braking and exhaust braking is established using the energy conservation theory. Through the brake temperature measurement test on the long downhill section of the expressway, the continuous temperature rise data of the brake under different braking modes and load, and the continuous cooling data of continuous uphill are obtained. At the same time, through the indoor bench test, Engine power curve. Finally, the test data test, some parameters in the model, such as the initial temperature, ambient temperature, etc. were amended. The results show that truck load, downhill slope length, slope and running speed are the main factors affecting the brake temperature. The model provides a theoretical basis for the safety research on the long downhill slope.