BorgWarner Introduces First Three-Stage Turbocharging System for
Maximum Power Diesel Engines
AUBURN HILLS, Mich.,
Nov. 8, 2012 /PRNewswire/ -- For
the first time, BorgWarner supplies its innovative three-stage
turbocharging technology for BMW's M Performance diesel engine, the
most powerful six-cylinder in-line diesel engine in the world.
Exclusively developed for BMW M Performance automobiles, the engine
powers the M550d xDrive Sedan and Touring, X5 M50d Touring, and X6
M50d models. With a maximum output of 280 kW (381 HP) and
a maximum torque of 740 Nm (546 lb-ft), the 3.0-liter engine uses
BorgWarner's three-stage turbocharging system to deliver
unparalleled performance and improved fuel economy.
"BorgWarner is proud to equip BMW's latest M Performance engine
with the first three-stage turbocharging system for diesel engines
in the world," said Frederic Lissalde, President and General
Manager, BorgWarner Turbo Systems Passenger Car Products. "Driven
to lead the next breakthroughs in advanced powertrain technologies,
BorgWarner is once again setting new benchmarks for maximum
performance combined with improved fuel economy and reduced
emissions."
BorgWarner's powerful turbocharging system consists of two small
BV45 high-pressure variable turbine geometry turbochargers
integrated with one larger B2 low-pressure water-cooled
turbocharger. By integrating an additional high-pressure
turbocharger, the engine's capability to generate boost pressure
reaches a completely new level compared with two-stage
turbocharging systems. The three turbochargers are activated
successively at different engine speeds. The first high-pressure
turbocharger starts at engine speeds just above idle. With
increasing revs, the larger low-pressure turbocharger comes into
play. To further increase performance, the second high-pressure
stage turbocharger comes on line as well with all three
turbochargers working in harmony. For effective and efficient boost
pressure, the exhaust flow and the supply of fresh air is regulated
with maximum precision. At particularly high speeds of the
low-pressure turbocharger, the wastegate valve is opened by a
vacuum actuator to avoid backpressure, while pneumatically
activated flaps precisely control the supply of fresh air. Indirect
charge air cooling optimizes the compressed air temperature in all
three turbochargers to increase engine output.
Compared with the 3.0-liter six-cylinder diesel engine in the
BMW 740d boosted by a BorgWarner regulated two-stage
(R2S®) turbocharging system, the BMW M550d xDrive Sedan
with BorgWarner's three-stage turbocharging technology increases
power output nearly 25 percent and improves fuel economy 8 percent
while meeting Euro 6 emissions
standards. The three-stage turbocharged diesel engine breaks new
ground with its specific output of 93.6 kW per liter of
displacement compared with 75.2 kW per liter in the two-stage
version.
About BorgWarner
Auburn
Hills, Michigan-based BorgWarner Inc. (NYSE: BWA) is a
technology leader in highly engineered components and systems for
powertrain applications worldwide. Operating manufacturing and
technical facilities in 57 locations in 19 countries, the company
develops products to improve fuel economy, reduce emissions and
enhance performance. Customers include VW/Audi, Ford, Toyota,
Renault/Nissan, General Motors, Hyundai/Kia, Daimler, Chrysler,
Fiat, BMW, Honda, John Deere, PSA, and MAN. For more information,
please visit borgwarner.com.
SOURCE BorgWarner Inc.