BorgWarner Twin Scroll Turbocharger Enhances Fuel Economy of Powerful New Gasoline Engine

Six-cylinder Direct Injection Engine with Variable Valve Train and BorgWarner's Twin Scroll Technology Delivers Same Performance as a V8 with Lower Fuel Consumption

AUBURN HILLS, Mich., March 25 -- BorgWarner supplies twin scroll turbochargers for the BMW 535i Gran Turismo featuring a newly developed 3.0-liter six-cylinder inline direct injection gasoline engine launched in October 2009 in Europe. The combination of BorgWarner's turbocharging technology with direct injection and variable valve timing results in 400 Nm of low-end torque and a maximum output of 306 horsepower. The new engine sets new standards for efficiency in its class and outperforms the response of many eight-cylinder naturally aspirated engines. In addition to providing outstanding performance, the optimized twin scroll turbocharger significantly boosts fuel economy and lowers emissions.

In order to develop a state-of-the-art engine that features low-end torque, responsiveness, high output and low emissions, BMW chose BorgWarner's twin scroll turbocharger for the new six-cylinder engine. "The twin scroll technology produces results similar to twin-turbo applications but in a smaller package with lower weight and cost," said Roger Wood, President and General Manager, BorgWarner Turbo Systems. "Our advanced technologies offer our customers the performance and value they need for today's marketplace."

A completely new exhaust manifold and turbocharger system was specifically designed to achieve the greatest benefits. The ducts of three cylinders at a time are separated from one another both in the exhaust manifold and the turbocharger. The concept enabled BorgWarner and BMW to develop an engine that combines comfortable driving with great performance at low engine speeds. The 535i Gran Turismo accelerates from a standstill to 62 mph (100 km/h) in just 6.3 seconds, underlining its sporting characteristics. At the same time, it delivers excellent fuel consumption of 31.7 mpg (8.9 liters/100 km) and complies with Euro 5 and ULEV-II emission standards.

BorgWarner Turbo 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.

Auburn Hills, Michigan-based BorgWarner Inc. is a product leader in highly engineered components and systems for vehicle powertrain applications worldwide. The FORTUNE 500 company operates manufacturing and technical facilities in 59 locations in 18 countries. Customers include VW/Audi, Ford, Toyota, Renault/Nissan, General Motors, Hyundai/Kia, Daimler, Chrysler, Fiat, BMW, Honda, John Deere, PSA, and MAN. The Internet address for BorgWarner is: http://www.borgwarner.com/.