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For the safety problem of heavy duty vehicles running on long downhill sections, a model was built for the application of engine brake and service brake combination based on test results. And a model of brake temperature rise for heavy duty vehicles running on long downhill sections was also established. For different braking modes, gear positions, speed and downhill slopes, brake temperature rising to 250℃ was used as the index. And then simulation of brake temperature rise and downhill distance was researched. Simulation results show that the combined braking of low gear and high speed should be adopted for heavy duty vehicles running on long downhill sections.

A Critcal Study of Driving Performance of Heavy Duty Vehicle Running on Long Downhill Road Using Engine Brake