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Summary & Details

Challenges and Approaches of Electric Vehicles Powertrain Mount System Optimization for NVH, Buzz Squeak Rattle and Durability

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Format: PDF

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Paper/Info type: SAE Paper

No.2021-01-1085

Pages: 1-8(Total 8 p)

Date of publication: Aug 2021

Publisher: SAE International

Language: English

Event: Noise and Vibration Conference & Exhibition

Detailed Information

Author(E)	1) Sandip Hazra, 2) Janardhan Reddy K
Affiliation(E)	1) Tata Motors, Ltd., 2) VIT Universtity Chennai
Abstract(E)	In electric vehicles, the powertrain mounting system design has challenges different from conventional internal combustion engine (ICE) powertrains. Due to the absence of source noise, the customer predominantly experiences the buzz, squeak and rattle (BSR) noise. The 6 degrees of freedom (DOF) modal frequency target is less stringent than a three-cylinder or four-cylinder ICE powertrain. The durability loads in EV also differ due to less powertrain weight. In this paper, a study has been carried out about balancing all three main performance parameters of modal decoupling, BSR and durability through powertrain mount design optimization. The article shows that a carryover ICE powertrain mount has typical issues in Electric Vehicle (EV). A case study has discussed in detail how to manage those issues. Finally, it is concluded that a particular focus is required during an early stage of mount design to address these challenges for an EV.

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