Turbocharger Noise Identification on a V8 Engine
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Being able to separate the combustion and mechanical noise to the global radiated engine noise is of prime interest in the development phase of the NVH target requirements definition and assessment. Ferrari uses a test bench, where all the signals are synchronously acquired with the LMS Scadas Lab acquisition system of Siemens PLM Software.
Emissions from Different Sources
The NVH (Noise, Vibration, Harshness) character of an engine is composed of a mixture of various and complex sources. Among them some are generated by the combustion process and are commonly referred to as combustion related noise sources, while other sources, commonly referred as mechanical, are generated by rotating excitation components (bearings and gears), structural excitation responses of the engine structures, and as well as from the engine accessories such as piston impacts, valves ticking and the turbocharger.
Being able to separate the combustion and mechanical noise from the global radiated engine noise...
Fabio Bianciardi, author of this paper, is a researcher involved in the Vlaio project Innovative NVH Testing and Simulation Methods for Eco-efficient Powertrain Engineering (Eco-Powertrain). The financial support of the Flemish institute for Promotion of Innovation is gratefully acknowledged. The authors would like to thank Claudio Manna, test bench engineer at Ferrari in Maranello, for his contributions to this paper.