In order to control both NOx and particulate emissions accurately, the amount of recirculated exhaust gas and air has to be precisely metered into the engine under all operating conditions.

A significant difference between a turbocharged diesel engine and a traditional naturally aspirated gasoline engine is the air entering a diesel engine is compressed before the fuel is injected. This is where the turbocharger is critical to the power output and efficiency of the diesel engine.

The Holset VGT™ from Cummins Turbo Technologies pioneered Variable Geometry (VG) technology for the commercial vehicle market in 1998. Featuring a patented sliding nozzle ring, the Holset VGT offers a wide flow range that allows for higher boost pressures at low engine speeds. VG technology provides the most fuel-efficient means of driving short-route Exhaust Gas Recirculation (EGR), which is used to reduce NOx levels.

A Holset power turbine works hand-in-hand with the Holset turbocharger by driving power back through the crankshaft and extracting energy from the exhaust stream: this is known as a turbocompound system. Both radial and axial power turbines are available for a variety of heavy-duty applications.

Darting over the water with the control lever in your hands, enjoying every sensation to the fullest: this is the experience you live for. MTU engines and drive systems for performance and standard yachts allow you to cruise confidently, with perfect control. Our engines are among the best and most desirable in the world. They’re […]