Brake Emission Testbed Automation and Control: Insights and New Developments

2026-26-0232

01/16/2026

Authors
Abstract
Content
A significant contributor to particle mass (PM) emissions originating from road transport are particles emitted from brakes, which in Europe are considered in the upcoming Euro 7 emission legislation. UN-GTR (United Nations Global Technical Regulation) no. 24 describes the methodology for measuring brake particle emissions in a test cell setting with a dynamometer, both in terms of PM and PN (particle number). A regulation-compliant test fulfills various quality criteria for different control parameters, which can often be met by applying different control strategies. In this study, we evaluate the effects of implementing different control strategies for torque applied to the brake by the dynamometer, as well as for sampling flow. Additionally, we discuss the cost-saving potential of increasing the automation degree of testing, as well as modifying existing testbeds to accommodate brake emission testing. The torque control strategies applied in this study did not influence PN or PM emissions. For mass-based sampling flow control, adjusting the flow according to momentary readings of pressure and temperature will lead to variation in isokinetic ratio. Conversely, setting constant values of pressure and temperature will lead to variation in volume flow through the cyclone. For realizing cost-saving potential, we present two new technical solutions: AVL PM Sampler xChange for automating the PM measurement, and AVL Brake Emission 3rd Party Integration platform for integrating AVL brake emission measurement instruments into already existing testbed infrastructures, that are only missing the instrumentation (e.g., a converted engine dynamometer).
Meta TagsDetails
Pages
8
Citation
Martikainen, Sampsa, Christoph Weidinger, and Michael Peter Huber, "Brake Emission Testbed Automation and Control: Insights and New Developments," SAE Technical Paper 2026-26-0232, 2026-, https://doi.org/10.4271/2026-26-0232.
Additional Details
Publisher
Published
Jan 16
Product Code
2026-26-0232
Content Type
Technical Paper
Language
English