Design and Optimization of Forced-Air Cooling System for Commercial Vehicle Brake System
Published March 12, 2021 by SAE International in United States
Citation: Peng, D., Tan, G., Tang, J., and Guo, X., "Design and Optimization of Forced-Air Cooling System for Commercial Vehicle Brake System," SAE Technical Paper 02-14-04-0031, 2021, https://doi.org/10.4271/02-14-04-0031.
To maintain the vehicle speed in a proper range, the commercial vehicle needs to brake frequently on a downhill path. The drum brake system of the medium- and heavy-duty commercial vehicles often faces the danger of brake fade, which reduces brake efficiency or even causes braking failure. They are critical potential risks on the road.
The kinetic energy is transferred into thermal energy during the braking process. The temperature rises dramatically during the braking process due to the massive thermal energy caused by the huge mass of the commercial vehicle. The brake efficiency and the life of the brake drum will decrease with the rising temperature. A malfunction of the brake system may occur if the drum brake is overheated. To improve the cooling efficiency of the drum brake, a forced-air cooling system driven by the air compressor in the diesel is designed for the drum brake system after the analysis of its thermal model. A computational fluid dynamics (CFD) model is established and modified after comparison with the test result. Based on this modified model, the parameters of this system are optimized through adaptive particle swarm optimization (APSO).
This optimized forced-air cooling system decreases the maximum temperature of the brake system from 291.9°C to 200°C under the most critical work condition. It allows the commercial vehicle to operate in a safer situation with a lighter weight compared to the current water cooling system.