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.
Provides a wide flow range allowing higher boost pressures at low engine speeds.
The Holset VGT was the first successful VG technology on a commercial application, and we continue to be the only manufacturer to provide sliding nozzle technology. Conventional VG technology uses swing-vane technology which controls boost pressure with nozzle vanes that pivot to create different nozzle areas. Swing-vane turbochargers are known for binding (backlash) and vane 'flutter' that results in less control. The Holset VGT is unique because the vanes slide axially so it has fewer moving parts and 85% fewer wear sites. This improves the durability and reliability of this technology; essential for today’s commercial diesel applications. Cummins Turbo Technologies’ world-class research and development continues to build upon today’s successful Holset VGT by improving total operating costs and fuel efficiency.
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