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Effect of Holes on Brake-Bleeding Performance Improvement in the EPB Caliper

Authors :
Jang-oh Mo
Source :
International Journal of Automotive Technology. 21:319-328
Publication Year :
2020
Publisher :
Springer Science and Business Media LLC, 2020.

Abstract

Brake-bleeding is the process of removing air bubbles present on hydraulic brake systems. In particular, the existence of air content within the EPB caliper deteriorates bleeding performance, causing a high-level compressibility of the brake fluid. This paper presents numerical and experimental investigations of the effect of holes on brake-bleeding performance improvement for three different nut-spindle models included in the driving-part model of the EPB caliper. In the present paper, compressible brake-fluid simulations with pressure rise and drop ranging in pressure from 0 to 100 bar are modelled with a transient numerical approach utilizing a three-phase mixture model and standard k-ω turbulence model. The experimental verification of the effect of the holes with a constant 2 mm diameter, determined from the simulation results, was conducted using a standard test device at Mando Corporation. In conclusion, the experimental results prove that the effect of the holes has considerable impact on the performance improvement.

Details

ISSN :
19763832 and 12299138
Volume :
21
Database :
OpenAIRE
Journal :
International Journal of Automotive Technology
Accession number :
edsair.doi...........0d9424eba9f585a2a251979bac799146
Full Text :
https://doi.org/10.1007/s12239-020-0030-y