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Related Concept Videos

Dry Friction01:30

Dry Friction

361
Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
361
Rolling Resistance01:21

Rolling Resistance

284
When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down...
284
  1. Home
  3. Research Domains
  5. Engineering
  7. Environmental Engineering
  9. Air Pollution Modelling And Control
  11. Investigations Of Airborne Tire And Brake Wear Particles Using A Novel Vehicle Design.
  1. Home
  3. Research Domains
  5. Engineering
  7. Environmental Engineering
  9. Air Pollution Modelling And Control
  11. Investigations Of Airborne Tire And Brake Wear Particles Using A Novel Vehicle Design.

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Investigations of airborne tire and brake wear particles using a novel vehicle design.

Manuel Löber1, Linda Bondorf2, Tobias Grein2

  • 1German Aerospace Center (DLR), Institute of Combustion Technology, Pfaffenwaldring 38-40, 70569, Stuttgart, Germany. manuel.loeber@dlr.de.

Environmental Science and Pollution Research International
|August 27, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

This study introduces a novel vehicle system to reduce non-exhaust emissions from tires and brakes. The system significantly cuts particulate matter, offering a cleaner solution for vehicle pollution.

Keywords:
Energy-dispersive X-ray spectroscopyMicroplasticNon-exhaust emissionsScanning electron microscopy

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Area of Science:

  • Environmental Science
  • Automotive Engineering
  • Air Quality Research

Background:

  • Non-exhaust emissions, particularly from tire and brake wear, are a growing concern due to increasing vehicle use and associated health risks of particulate matter (PM).
  • Traditional exhaust emission controls do not address these non-exhaust sources, necessitating innovative solutions.

Purpose of the Study:

  • To develop and evaluate a vehicle demonstrator (ZEDU-1) with integrated systems for reducing tire road wear particles (TRWP) and brake wear emissions.
  • To investigate the effectiveness of a novel enclosed multi-disk brake and a ventilation/filtering system in capturing non-exhaust particulate matter.

Main Methods:

  • Development of a vehicle demonstrator incorporating a tire emission capture system and an enclosed multi-disk brake.
Tire road wear particles
Tire wear
Ultrafine particles
Urban air quality
  • Particle number (PN) and particle size distribution (PSD) measurements were conducted using a chassis dynamometer and on a test track, with analysis down to 2.5 nm.
  • Characterization of collected particles using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS).

    • Main Results:

    • The novel multi-disk brake system reduced particle emissions by approximately 30% compared to conventional brakes.
    • Highest TRWP emissions were observed during vehicle acceleration and harsh braking events.
    • SEM and EDS analysis revealed diverse particle morphologies and distinct differences between particles generated in laboratory (dynamometer) versus real-world (test track) conditions.

    Conclusions:

    • The developed vehicle demonstrator effectively reduces non-exhaust particulate emissions, particularly from braking systems.
    • The enclosed multi-disk brake shows significant potential for lowering particle emissions in vehicles.
    • Understanding the sources and characteristics of TRWP is crucial for developing effective mitigation strategies.