BorgWarner's Twin Scroll Turbocharger Delivers Power, Response

BorgWarner Introduces Twin Scroll Turbocharger

This turbocharger allows manufacturers to develop a low-emissions engine with excellent performance.

BorgWarner says its twin scroll turbochargers featuring enhanced high-temperature performance (thanks to the use of sophisticated steel alloys) are being delivered to the BMW Group for its new 3.0-liter inline six-cylinder gasoline engine. Used across a wide range of BMW passenger cars, the engine has two performance options – medium and high – and delivers 250 to 280 kW of power and 500 to 550 Nm of torque.

BorgWarner’s twin scroll turbocharger allows manufacturers to develop a low-emissions engine with excellent performance.

“Twin scroll technology produces results similar to twin turbo applications but in a smaller package with reduced weight and cost,” said Joe Fadool, president and general manager, BorgWarner Emissions, Thermal and Turbo Systems. “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, minimizes parasitic back losses and improves responsiveness at low engine speeds, according to BorgWarner.

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 says it was able to provide an extremely economical solution for the customer by developing manufacturing processes that led to weight reduction.

You May Also Like

SMP’s October Release Includes 276 New Numbers

Standard and Four Seasons continue to expand their programs for hybrid and electric vehicles.

Standard Motor Products, Inc. (SMP) has released 276 new part numbers in its October new number announcement. This most recent release provides new coverage in 113 distinct product categories and 118 part numbers for 2022, 2023 and 2024 model-year vehicles.

Standard and Four Seasons continue to expand their industry-leading programs for hybrid and electric vehicles. Standard’s latest additions include Park Assist Sensors for the 2022-17 Toyota Prius Prime and Canister Purge Solenoids for the 2022-18 Lexus ES300h. Four Seasons released Hose Assemblies for hybrid vehicles such as the 2022-18 Honda Accord and electric vehicles including the 2021-17 Chevrolet Bolt. Brushless Blower Motors have been introduced for the 2022-16 Mercedes C-Class Hybrid, and Evaporators are now available for the 2022-2020 Ford Interceptor Utility and Lincoln Aviator Hybrid.  

AMC Introduces 1 Gallon Eco‐Pack for BUGOFF

The Eco‐Pack stands out for its environmentally conscious design, promoting a sustainable approach to car maintenance.

Philips Xperion 6000 Headlamp Offers Hands-Free LED Lighting 

The headband-mounted work light allows service pros to shine brilliant LED illumination exactly on the task at hand.

AMSOIL Expands Synthetic European Motor Oil Line

New 0W-30 and 10W-60 viscosities are designed for the unique demands of gasoline, diesel and hybrid European vehicles.

Continental Offers ClearContact Synthetic Wiper Blades

The synthetic rubber formula delivers superior all-weather performance, even at high speeds and at extreme temperatures.

Other Posts

Turbocharger Maintenance ft. Rein TechSelect Turbo Kits

Learn about common challenges with turbocharger maintenance and how Rein TechSelect Turbo Kitsmake the repair process easier for technicians.

BorgWarner to Acquire Eldor’s EHS Business

Eldor’s EHS segment includes on-board chargers, DC/DC converters and integrated high-voltage boxes.

LIQUI MOLY Releases A/C System Cleaner

The cleaning solution is designed to improve the efficiency and lifespan of HVAC systems.

A Closer Look: Turbocharger Operation and Installation

Turbocharger Overview With an effort to increase fuel efficiency, maintain performance and reduce emissions, vehicle manufacturers are adding turbocharged engines to their lineups at a significant rate. Over the next five years, the turbo service market will continue to experience substantial growth.  At a basic level, a turbocharger consists of just three major internal components: