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Fixed Geometry Turbochargers

Cummins fixed geometry turbochargersThe Holset brand has its roots in fixed geometry technology, turbochargers which funnel all the exhaust gas to the turbine to boost engine power. With over 60 years experience of meeting customer power requirements, Cummins Turbo Technologies expertise of this technology is tried and tested, and today produces some of the world’s most optimised, efficient and reliable turbochargers.

Fixed Geometry Established, robust and cost effective.

Although the concept of fixed geometry has been unchanged for decades, Cummins Turbo Technologies has progressively improved performance and reliability, using the same world-class engineering that is used throughout Cummins. As a cost-effective method for boost, Holset fixed geometry turbochargers excel in technical performance, which directly translates into engine fuel economy. These fuel-economy advantages mean that fixed geometry turbochargers are a key customer solution as emissions regulations continue to become more stringent.

Product Features & Benefits

  • Ultra high boost capacity for increased power levels
  • Enables engine downsizing for improved space and weight efficiency
  • Suitable for light-heavy duty applications
  • Superior altitude capabilities
  • Reduces fuel consumption

Wastegate

cummins waste gate turbochargersCummins Turbo Technologies optimises the use of wastegates – devices that control the amount and timing of excess exhaust gas release – available in either pneumatic or Electrically Controlled Unit (ECU) configurations. Tried and tested Holset wastegate turbochargers offer a cost-effective, reliable and durable solution for low to mid-power ranges, with leading-edge technology that diverts ‘waste’ exhaust for a better match with most conditions.

With a wastegate, turbocharger overspeed is prevented, as is engine over-boost. The well-engineered Holset wastegate turbochargers employ the same industry-leading design techniques used throughout Cummins. Wastegate turbochargers improve upon fixed geometry units with an overall 3% increase in efficiency, and they can be optimised for Selective Catalytic Reduction (SCR) systems.

Product Features & Benefits

  • Ultra high boost capacity for increased power levels
  • Enables engine downsizing for improved space and weight efficiency
  • Suitable for light - heavy duty applications
  • Superior altitude capabilities
  • Reduces fuel consumption

Holset VGT

cummins variable geometry turbochargersThe 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.

Holset VGT - 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.

Product Features & Benefits

  • Best fuel-efficient means of driving exhaust gas recirculation
  • Reduces NOx levels
  • Higher boost at lower engine speeds
  • Enables efficient engine braking
  • Fewer wear sites equate to increased durability