Study of NVH Design Strategies for Typical HEV Operating Conditions

Paper #:
  • 2017-01-1063

Published:
  • 2017-03-28
Abstract:
In contrast with conventional ICE vehicles, hybrid electric vehicles have their unique power flow structure and operating conditions, which complicates HEV’s NVH performance and design. At present, the HEV programs are mostly carried over from their corresponding conventional counterparts for many OEM’s. As a result, the total vehicle weight will increase 10% to 15% compared to their conventional version. However, the vehicle structural characteristics, such as hard points and chassis suspension stiffness, still remains similar to their conventional version. Therefore, even under the same operating conditions, HEV’s might develop more serious and complicated NVH problems. In this work, the structural and operating characteristics of an HEV is briefly explained first. Based on the principle of vibration and noise control methodology, the most effective NVH control strategies under typical HEV operating conditions are looked into and presented. Finally, a case study is carried out based on a real NVH problem that occurred during the development of an HEV program.
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