Technologies help increase fuel economy, reduce emissions, and imrpove performance for medium-duty engines.
BorgWarner supplies its latest turbocharging technology for a new generation of medium-duty engines from Mercedes-Benz, the first commercial vehicle manufacturer to achieve Euro VI compliance for all of its medium- and heavy-duty engines.
Replacing the successful 900 series, the new OM 934 and OM 936 engines are available in different output variants and used in a wide range of on-highway applications such as medium-duty trucks and urban buses. Equipped with the latest B-series turbocharging technology for standard power outputs and an award-winning regulated two-stage (R2S) turbocharger for top outputs, BorgWarner's advanced technology helps the engine significantly reduce emissions while improving performance and fuel economy. In addition, BorgWarner also supplies its advanced fans and fan drives for this new engine series.
"Compared with current standards, Euro VI emissions standards challenge engine manufacturers to reduce nitrogen oxides by about 80%. BorgWarner's latest turbocharging technologies help satisfy these standards with the added bonus of improving fuel economy and engine performance," says Pete Kohler, president and general manager, BorgWarner Turbo Systems Commercial Diesel Products. "Our highly-efficient turbocharging technologies provide OEMs with state-of-the-art powertrain solutions for on-and off-highway applications."
The new Mercedes-Benz medium-duty engines cover the 5.1-liter four-cylinder OM 934 engine and the 7.7-liter six-cylinder OM 936 engine with a power range of 115kW (156hp) to 260kW (354hp). Both engines are equipped with variants of BorgWarner B-series turbochargers.
The standard variant of both engines comes with the latest B-series turbocharger while the high-performance variant features BorgWarner's R2S turbocharging technology, featuring a small high-pressure turbocharger and a larger low-pressure B2 turbocharger. BorgWarner's recent B-series turbocharging advancements include titanium compressor wheels as well as electric actuators for the wastegate and turbine bypass control.
BorgWarner also integrated parts of the exhaust manifold into the turbine housing of these applications for improved thermodynamics, compact packaging and simplified installation during the engine build. Powered by BorgWarner's turbocharging technology, the new Mercedes-Benz medium-duty engine generation is a powerful and highly economical solution for various applications, delivering durable and reliable operation in even harsh commercial diesel powertrain environments.