vehicle
1 6
One Step Ahead
of Future
Brake Emission
Legislation
Continuous improvements in combustion-based mo-
bility, driven by increasingly stringent exhaust gas regu-
lations, have led to a significant reduction in particulate
matter pollution. Today, the majority of vehicular partic-
ulate matter no longer originates from exhaust gases, but
from other sources such as tire, road and brake abrasion.
Of these, brake abrasion is considered to have the great-
est potential for reduction.
Under the Particle Measurement Program (PMP) of the
United Nations Working Group on Pollution and Energy
(UN-GRPE), a methodology has been developed to de-
scribe the procedure and conditions for measuring brake
particulates and which metrics should be used. Subse-
quently, this methodology, known as the United Nations
Global Technical Regulation (UNGTR) will become the
foundation for future legislation with which vehicle and
AVL is leading the
world in brake
emission measure-
ment systems
brake component manufacturers
will have to comply, in addition
to already existing requirements
for brake development like brak-
ing performance, noise and driv-
ing stability. To support this com-
pliance, there is a need for suitable
testing solutions.
AVL EXPERTISE SETTING THE
STANDARD
As an industry leader, AVL played
a role in the definition of this UN-
GTR and we have developed a so-
lution – AVL Brake Emission Test
Systems – that delivers repeatable
and comparable measurement re-
sults through comprehensive opti-
mization of the entire measurement
chain. This starts with flywheel-free
loading machines, air conditioning
systems, volume flow generation,
and the enclosure of the brake sys-
tems to be measured. It also includes
suitable sampling systems with ap-
propriate sampling probes, measur-
ing devices for particulate mass, par-
ticle number and flow measurement
up to test run automation and eval-
uation. All of which meet the re-
quirements of the GTR. Modular
in design and consisting of self-con-
tained subsystems, it can be tailored
to your precise requirements.
DEEP KNOW-HOW FOR
ACCURATE RESULTS
The success of our solution is based
on a deep understanding of the
physical behavior of the particles
generated during braking process-
es. In addition to cooling the brak-
ing system, the solution’s enclosure
is designed to dissipate the emissions
generated during braking as com-
pletely as possible, without major
particle losses. The transfer lines of
the measuring equipment are built to
minimize particulate losses and sup-
port efficient test rig operation. Air
mass measurement as well as air con-
ditioning with temperature and hu-
midity control complete the system.
Main components
of the AVL system
for measuring brake
abrasion particles.