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Interior Sound Quality Refinement Base on Mechanism Study of Crankshaft Impact Noise
Technical Paper
2019-01-0772
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A rumbling noise is audible in a vehicle passenger compartment during acceleration. Mechanism detail of the rumbling noise is studied. A series of preliminary transfer path experiments investigation on chassis dynamometer shows that the interior rumbling noise is mainly induced by abnormal crankshaft impact at particular crank angle. Spectrum analysis indicates that high level half order harmonic components significantly affects the rumbling noise. Multi-body dynamics model of the powertrain is developed to further investigate the root cause of the abnormal crankshaft impact. Experiment results are used to verify the numeric model. High deviation of main bearing forces at the crank angle 0° to 180° after the Fire Top Dead Center of the no.l cylinder is considered to fundamentally induces the high level half order components. The force ripple coupled with the crankshaft resonance induces the crankshaft rumbling. Sensitivities analysis of various bearing seat structure, crankshaft structural parameters were carried out. The ladder frame, a stiffened crankshaft with bigger overlap and shortened the front end offset distance seem effectively reduce the rumbling impact and improve interior sound quality.
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Authors
- Zhangming Su - GAC Automotive Engineering Institute
- Hanshuang Chen - GAC Automotive Engineering Institute
- Qi Yang - GAC Automotive Engineering Institute
- Dandan Kong - GAC Automotive Engineering Institute
- Weizhe Xing - GAC Automotive Engineering Institute
- Yanghui Xu - GAC Automotive Engineering Institute
- Xuelu Cao - South China University of Technology
Citation
Su, Z., Chen, H., Yang, Q., Kong, D. et al., "Interior Sound Quality Refinement Base on Mechanism Study of Crankshaft Impact Noise," SAE Technical Paper 2019-01-0772, 2019, https://doi.org/10.4271/2019-01-0772.Also In
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