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Strategies for Minimizing the Noise Impact of a Range Extender for an Electric Vehicle
Technical Paper
2022-01-0966
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The car buying public’s enthusiasm for electric vehicles continues to accelerate rapidly, driven by a desire to fulfil global climate change objectives, and supported by tax incentives. However, range anxiety persists as one of the main barriers to take-up, because larger battery packs remain heavy and expensive (cell price reductions are slowing). One way to mitigate these disadvantages is to fit a range extender system, powered by an efficient internal combustion engine, but such systems can cause noise concerns.
Ricardo has developed a simulation-based approach, pragmatically applicable at concept stage, to define the range extender operating conditions that minimize the impact on noise heard by the driver and passengers inside the vehicle. Transfer path analysis considered both air-borne and structure-borne noise contributions from the range extender, in context with noise contributions from electric drive unit, road and wind, under various typical vehicle operating conditions.
The study found that the range extender was almost always audible - subjectively, humans were able to identify the engine tones remarkably clearly even at low noise levels. A simple objective metric was developed and proved to be a useful indicator. However, with some powertrain noise reductions, the model showed that the range extender noise could be reduced to a ‘distant hum’, particularly at higher vehicle speeds.
Authors
Citation
Maunder, M. and Poggi, M., "Strategies for Minimizing the Noise Impact of a Range Extender for an Electric Vehicle," SAE Technical Paper 2022-01-0966, 2022, https://doi.org/10.4271/2022-01-0966.Also In
References
- Bassett , M. , Hall , J. , Kennedy , G. , Cains , T. et al. The Development of a Range Extender Electric Vehicle Demonstrator SAE Technical Paper 2013-01-1469 2013 10.4271/2013-01-1469
- Shibuya , A. , Nakada , N. , and Kimura , M. Development of a Brand New Hybrid Powertrain for Compact Car Market 25th Aachen Colloquium Automobile and Engine Technology 10-12 Oct 2016 978-3-00-052110-2 1029 1046
- Poggi , M. , Maunder , M. , Powell , N. , Strong , G. et al. The Application of Flexible Multi-Body Dynamic Models and Noise Transfer Path Analysis to Optimise Vehicle Sound Quality FISITA World Automotive Congress Oct 2006 Yokohama, Japan