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BorgWarner supplies VTG turbochargers for diesel engines

ABR Staff Writer Published 31 January 2011

BorgWarner is now supplying the new generation of variable turbine geometry (VTG) turbochargers for the newly developed 1.6-liter four-cylinder common-rail diesel engines featured in the new MINI family.

The company said that the downsized engine is available with a power output of 90HP (66kw) in the MINI One D and One D Clubman and with 112HP (82kw) in the Cooper D and Cooper D Clubman - and for the first time in the Cooper Convertible.

BorgWarner's BV35 VTG turbocharger is controlled by an electric actuator that helps the engine set new standards of efficiency and performance, achieving average fuel consumption of 61.8 mpg (3.8 liters/100km) in both hatchback models, with CO2 emissions as low as 99 g/km.

BorgWarner EVP Roger Wood said they are pleased to extend their very successful and long-standing partnership with the BMW group to the compact car segment.

"Using BorgWarner's advancements in turbocharging technology, modern diesel engines achieve optimum power output and great fuel economy," Wood said.

The company said that it was possible to downsize the diesel engine's displacement from two liters to 1.6 liters with its next generation VTG turbocharger, while maintaining the optimum ratio between bore and stroke of the combustion chambers.

To improve engine response at very low rpm, patented S-shaped guide vanes regulate VTG turbine output by changing the inflow angle and speed at the turbine wheel inlet.

Compared with diesel engines previously utilized in the MINI, the new four-cylinder units deliver higher maximum torque of 215Nm and 270Nm respectively, said the firm.