BorgWarner, a global product
leader in clean and efficient technology solutions for combustion, hybrid and
electric vehicles has provided its leading regulated two-stage (R2S)
turbocharger for Daimler’s latest 2.9-litre six-cylinder inline diesel engine
OM 656, which is initially featured in the updated Mercedes-Benz S-Class
launched in 2017.
Meeting the requirements of
state-of-the-art engine concepts, BorgWarner’s advanced turbocharging
technology contributes to enhanced fuel economy and improves torque,
performance and exhaust gas recirculation rates even under full-load conditions
while significantly reducing emissions.
“Due to its optimised design,
our turbocharging solution helps automakers overcome challenging system
placement demands such as a tight fit and high temperatures,” said Frédéric
Lissalde, President and General Manager, BorgWarner Turbo Systems, adding that “We
are pleased to support our customers by delivering our highly efficient R2S
turbocharging technology to meet the highest possible standards.”
The first R2S turbocharger on
the market to have a turbine housing made of very robust cast steel also
features a water-cooled e-actuator, bearing housing and compressor housing.
BorgWarner’s R2S turbocharging solution consists of two turbochargers arranged
in series – a compact high-pressure exhaust gas turbocharger featuring the
company’s latest variable turbine geometry technology and a larger waste-gated
low-pressure one with ported shroud compressor.
While running at low engine
speeds, the small high-pressure turbocharger provides most of the boost and at
the same time excellent response, so that the driver does not experience any
turbo lag. With increasing engine speed, a bypass begins to open, so that
nearly all of the gases flow directly towards the low-pressure turbocharger
which takes over the main compression work to provide high boost pressures with
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