BorgWarner's R2S Turbocharger Boosts Power 20%

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BorgWarner's Turbo Technology Helps New Diesel Passenger Car Engine Meet Euro 5 Standards

AUBURN HILLS, Mich., March 3, 2009: BorgWarner's regulated two-stage (R2S(R)) turbocharging system boosts power 20% while improving fuel economy and reducing CO2 emissions 13% for the new four-cylinder diesel engine from Mercedes-Benz, offering consumers significant improvements compared with the previous 2.2-liter diesel engine. Designed for either transverse or longitudinal installation and equally suitable for all-wheel-drive vehicles, the new power unit will be the backbone of Mercedes-Benz diesel engine production. Initially launched in Europe, the engine meets Euro 5 emission standards as well as US Tier 2 BIN 5 emission requirements.

With the application of BorgWarner's R2S(R) turbocharging technology in the 220 CDI and 250 CDI engines, Mercedes-Benz plans to implement two-stage turbocharging in a production passenger car diesel engine for the first time, following its highly successful use of R2S(R) turbochargers in the previous engine generation for the Sprinter van.

"BorgWarner's R2S(R) turbocharger allows the new Mercedes-Benz diesel engine to raise the bar on power and torque, yet emit substantially less CO2 and consume less fuel," said Roger Wood, President and General Manager, BorgWarner Turbo & Emissions Systems. "We are pleased to support Mercedes-Benz in delivering economical, environmentally friendly, powerful performance with this new generation of engines."

BorgWarner's R2S(R) regulated two-stage turbocharging system consists of two series-connected turbochargers: a smaller unit (referred to as the high-pressure turbocharger) and a larger unit (known as the low-pressure turbocharger). At low engine speeds, the smaller high-pressure turbocharger ensures spontaneous engine response without "turbo lag." With increasing engine speed, the larger low-pressure turbocharger gradually takes over more of the work, ensuring constantly increasing power and high output torque across a wide range of engine speeds.

As a result, the R2S(R) turbocharger achieves both high torque at low engine speeds as well as maximum output at high engine speeds. The combination allows car makers to offer low-fuel-consumption, efficient, downsized engines with the dynamic response and high peak output power of a larger engine, all with lower emissions and fuel consumption. BorgWarner's patented R2S(R) technology has received multiple awards, including a 2008 Automotive News PACE Environmental Award.

BorgWarner Turbo & Emissions Systems is a leading global producer of turbochargers, exhaust gas recirculation valves and other engine air management systems for passenger cars, light trucks and commercial vehicles. These systems are designed to improve fuel economy, reduce emissions and enhance vehicle performance.

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