A NEW SPIN ON FANS
Borg Warner’s newest engine-cooling-fan designs target improved fuel economy, reduced noise
in on- and off-highway applications
Modern diesel engines used in commercial trucks and off-highway equipment require intelligent, durable and precise
cooling solutions. While the evolution of electronically controlled
fan drives and coolant pumps have
garnered a lot of attention, recent
advancements in cooling fans have
almost gone unnoticed.
Borg Warner Thermal Systems, part
of $7.18 billion global powertrain-technology specialist BorgWarner,
has over the last year launched new-generation Vistronic fan drives (see
February 2014 Diesel Progress) and
heavy-duty controlled coolant pumps
(see June 2014 Diesel Progress).
More recently, the company has
turned its focus on cooling fan design.
The result, BorgWarner said, is a
range of products for trucks and off-highway equipment that can provide
as much as a 10% increase in fan
efficiency, with concurrent improvements in fuel economy and significant
reductions in noise.
Though the fan remains a core
part of any engine or vehicle cooling
system, as a purely mechanical part,
it is often overlooked when trying to
improve fuel consumption, according
to Frank Haase, lead engineer, Global
Fan Development Engineering, for
Borg Warner Thermal Systems. “Every
component has the potential to help
improve fuel economy,” Haase said.
“At BorgWarner, we focus on product
leadership and systems integration.
“With fan technology, we take many
different approaches. For example,
using our proprietary mixed-flow-fan
design tool, we have a straightforward
method of designing the right fan for
a specific application. We can also
optimize the shroud design and the
installation conditions using computational fluid dynamics.
“However, the most important analysis is determining how, when and where
the vehicle is used so that cooling solutions can be customized to the needs
of the engine. A Class 8 commercial
BorgWarner has developed a new six-blade engine-cooling fan (left)
designed to improve cooling performance for Class 8 trucks. The company
has also launched a new steel-hub fan with molded blades that is engineered
to provide durable, cost-effective cooling in off-highway engine applications.