december2022 - 13

Haldex
In 2018, Haldex began offering the lightweight
Gen II version of the ModulT ADB for trailers.
This year, the Swedish brake maker came out
with ADBs for trucks, based on the Gen II design,
starting with medium-duty DBT22 MD.
The ModulT product line also includes the
DBT22LT caliper for 22 " wheels. Design features
include a single casting that reduces weight by
avoiding the need for an extra interface and more
bolts. Because the system employs a single tappet
mechanism, rather than twin, fewer parts overall
are needed.
In combination with its air disc brake, Haldex
also offers the fully sealed LifeSeal+ spring brakes
for all truck, tractor, and trailer applications
equipped with air disc brakes.
" Standard spring brakes wear out quickly,
usually from corrosion and contamination ingress
through the vent holes, " said Denisse Pedraza,
commercial product manager for disc brakes
and actuators at Haldex. " That results in premature
breakage of the power spring, which leads to
unscheduled repair and replacement, costly downtime,
roadside repairs, and even unsafe or inadequate
braking performance. With LifeSeal+, the
spring chamber is completely sealed, so contaminants
cannot get in and the actuators last twice
as long as traditional vented actuators.
" Braking systems are continuously evolving, "
she continued. " In 2026, we will release the Haldex
EMB, an electromechanical
brake. The EMB is much
simpler than existing pneumatic
systems because it is electrically
controlled and actuated from
the brake pedal to the wheel end. "
She added these EMBs have about
half as many components, so the entire
system is lighter and simpler to produce
and install.
" Because it does not need a compressor,
the high-efficiency EMB offers a 90% energy
savings compared to existing conventional
pneumatic systems on trucks and buses, "
Pedraza added. " The EMB is also quieter because
there are no compressors or valves, which are
typically noisy when charging and venting. "
EMB includes an electric parking brake function
as part of an integrated wheel end design.
According to Pedraza, the system delivers 15%
reduced stopping distance thanks to better and
more precise control of wheel speed compared to
pneumatic systems. This actuator control precision
results in a more stable clamp force on the
rotor, increasing the life of pads and lowering
brake dust emissions.
" EMB offers the level of diagnostics and redundancy
in controls to support Level 5 autonomous
commercial vehicles, " Pedraza added. " Over the
next few years, Haldex will continue developing,
testing, and validating the technology with simu»
Haldex ModulT Gen II
Haldex
lations and physical units in readiness for EMB
industrialization. "
Keeping with the trend of mergers and acquisitions,
Haldex was acquired by SAF-Holland Group
in August.
-Additional reporting by John Hitch.
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