Turbocharging Technology Reduces Fuel ConsumptionTurbocharging Technology Reduces Fuel Consumption

BorgWarner of Auburn Hills, MI has produced a regulatedtwo-stage and variable turbine geometry (VTG) turbocharging technology for BMW's3.0-liter straight six-cylinder diesel engine. The turbocharging technology wasdesigned to boost performance while improving fuel economy by 4 percent.

BorgWarner worked with BMW to unite two advancedtechnologies in an effort to accelerate the carmaker's engine downsizingstrategy without compromising power and torque. The turbocharging system consistsof two series-connected turbochargers. A smaller turbocharger engages at lowengine speeds. As the engine reaches mid-range speeds, a larger, low-pressureturbocharger takes over, providing the boost pressure to reach maximum enginetorque. The combination was designed to achieve both high torque at very lowrevs and maximum output at high engine speeds.

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