BorgWarner’s Twin Scroll Turbocharger promises performance with features

  • Industry News
  • Feb 20,20
The engine comes in two performance options such as medium and high, which delivers 250 to 280 kW of power and 500 to 550 Nm of torque.
BorgWarner’s Twin Scroll Turbocharger promises performance with features

Auburn Hills, Michigan

BorgWarner’s Twin Scroll Turbochargers known for enhancing high temperature performance

are being delivered to the BMW Group for its new 3.0-liter inline six-cylinder gasoline engine. Twin Scroll Turbocharger uses sophisticated steel alloys and is compact and helps to reduce emission.  

It is widely used across BMW passenger cars. The engine comes in two performance options such as medium and high, which delivers 250 to 280 kW of power and 500 to 550 Nm of torque. 

Joe Fadool, President and General Manager, BorgWarner Emissions, Thermal and Turbo Systems, said, “Twin scroll technology produces results similar to twin turbo applications but in a smaller package with reduced weight and cost. We are delighted to have worked with BMW to develop and deliver these latest designs, which use advanced high-temperature alloys and casting technologies that allow our customer to develop a low-emissions engine that combines comfortable driving with excellent performance and an agile response at low engine speeds. With this project successfully completed a large number of BMW passenger cars are expected to be equipped with BorgWarner turbochargers into the future.” 

When using a BorgWarner twin scroll turbocharger for a six-cylinder engine, the ducts serve three cylinders at a time and are separated in both the exhaust manifold and turbocharger. This strategy prevents pulsating exhaust gases from interfering with each other as they are directed through two separate spiral chambers, or scrolls, in the turbocharger. Individual nozzles – one smaller and sharper for better low-end response and the other larger and less angled for high output requirements – are directed at the turbine. Compared with a single scroll turbocharger, a twin scroll design recovers more energy from the exhaust gases, minimises parasitic back losses and improves responsiveness at low engine speeds. 

BorgWarner’s major innovations for the turbocharger center on the use of sophisticated high-temperature-resistant materials that enable elevated combustion temperatures to be used. This results in a superior fuel-air combustion conversion and cleaner exhaust gases that support BMW’s high-efficiency emission control system.  

While using top-quality materials such as high-alloyed steel and castings, BorgWarner was able to provide an extremely economical solution for the customer by developing manufacturing processes that led to weight reduction.   

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