Dedicated World-Class Test Cell

Controlling Noise, Vibration and Harshness (NVH) is one of the greatest and most elusive challenges in turbocharger manufacture. Experts at Cummins Turbo Technologies have honed in on NVH, devoting a proprietary, world-class NVH test cell to solving myriad conditions that cause noise and vibration related to turbocharger use.

Extensive Engine Knowledge

Engine performance, reliability and vehicle refinement all require low vibration levels. Vibration plays an important role in the end user’s perception of quality and has a direct impact on durability and warranty costs. Vibration of the turbocharger can lead to noise, which can have a large impact on the perception of overall vehicle quality. To understand the noise and vibration associated with a turbocharger installation, it is necessary either to build and test a prototype or to simulate the system using a computer model.

Expertise in Analysis Techniques

There is an increasing demand from customers to support auxiliary components such as exhaust brakes, Exhaust Gas Recirculation (EGR) valves and catalysts from the turbine housing of the turbocharger. This additional weight increases the loads placed on the turbocharger, often bringing resonances within the running speed of the engine. This can lead to other problems, such as noise, along with subsequent damage to components, either by overstressing or fatigue. Analysis techniques are important for the accurate identification of vibration sources and subsequent loads, with their location, placed upon the turbocharger. Future exhaust and emission technologies mean that the turbocharger is likely to be incorporated into increasingly complex systems, leading to new vibration problems. At Cummins Turbo Technologies, NVH engineers are equipped and experienced to take on such problems, both now and in coming years.