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Geartrain Noise Optimization in an Electrical Drive Unit
Technical Paper
2015-01-2365
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Alternative powertrains, in particular electric and plug-in hybrids, create a wide range of unique and challenging NVH (noise, vibration & harshness) issues in today's automotive industry. Among the emerging engineering challenges from these powertrains, their acoustic performances become more complicated, partially due to reduced ambient masking noise level and light weight structure. In addition, the move away from conventional displacement engines to electrical drive units (EDU) has created a new array of NVH concerns and dynamics, which are relatively unknown as compared to the aforementioned traditional setups.
In this paper, an NVH optimization study will be presented, focusing on four distinct factors in electric drive unit gear mesh source generation and radiation: EDU housing and bearing dynamics, gear geometry, EDU shafting torsional dynamics, and EDU housing structure. The study involves intensive FEA modeling/analyses jointly with physical validation tests. All four factors are evaluated for their contributions to noise performance, as well as their theoretical performance boundaries. Results are presented, which demonstrate the ability of this engineering approach to both optimize mass and performance of EDU products.
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Citation
Sun, Z., Steyer, G., and Ley, J., "Geartrain Noise Optimization in an Electrical Drive Unit," SAE Technical Paper 2015-01-2365, 2015, https://doi.org/10.4271/2015-01-2365.Also In
References
- Trigg , Tali and Telleen Paul Global EV Outlook: Understanding the Electric Vehicle Landscape to 2020 IEA.org, 2013 IEA Web. 27 MAY 2014
- Goetchius , Greg Leading the Charge - The Future of Electric Vehicle Noise Control Sound and Vibration April 2011 5-6. Web
- Govindswamy , Kiran Introduction to NVH Aspects of Hybrid and Electric Vehicles Course Packet SAE International 2013