Abstract
For ensuring safety 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. A model of brake temperature rise for heavy duty vehicles running on long downhill sections was also constructed. For different braking modes, gear positions, speed and downhill slopes, brake temperature rising to 250°C was used as the index. Then simulation of brake temperature rise and downhill distance was researched. Simulation results illustrate that the combined braking of low gear and high speed should be adopted for heavy duty vehicles running on long downhill sections.
Highlights
The implementation of develop-the-west strategy has unfolded emerging opportunities for regional economy
When a vehicle runs on a downhill road and braking measurements are taken, the vehicle decelerates with service brake force, rolling resistance, air resistance, and continuous brake force
Brake temperature rise model of heavy duty truck running on continuous downhill road is studied with particular focus on different brake methods, gear position, vehicle speed and gradient
Summary
The implementation of develop-the-west strategy has unfolded emerging opportunities for regional economy. On long steep downhill distance, the use of brake increases and brake temperature exceeds the margins. It directly affects the brake performance and gradually deteriorates with fast movement of the vehicle [5, 6]. While driving on steep downhill roads, continuous brake force is essentially required. If continuous brake force fails to meet the need of braking requirements, service brake starts working. For this reason, driving performance with the combination of engine brake and service brake for heavy duty truck has been discussed in this paper
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