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Interior Sound Quality Refinement Base on Mechanism Study of Crankshaft Impact Noise
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 02, 2019 by SAE International in United States
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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.
- 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
CitationSu, 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.
- Kamiya , T. , Atsumi , T. , and Tasaka , K. Toyota's New Type of Crankshaft Pulley to Improve the Compartment Tone Quality SAE Technical Paper 1988-02-01 1988 10.4271/880078
- Yu , S. Development of Dual Mode Engine Crank Damper SAE Technical Paper 2003-05-05 2003 10.4271/2003-01-1675
- Kuroda , O. and Fujii , Y. An Approach to Improve Engine Sound SAE Technical Paper 1988-02-01 1988 10.4271/880083
- Kimura , J. , Kobayashi , S. , Hoshina , K. , Kawase , K. et al. Crankshaft Impact Noise and Three-Dimensional Vibration SAE Technical Paper 2014-10-13 2014 10.4271/2014-01-2863
- Imai , Y. , Sannodo , N. , and Kondo , T. Reducing Crank Rumble Using Transfer Path Analysis to Assess Engine Modifications SAE Technical Paper 2003-05-05 2003 10.4271/2003-01-1428
- Orzechowski , J. , Sandhu , J. , Beloiu , D. , and Talby , A. Modeling and Analysis of Powertrain NVH with Focus on Growl Noise SAE Technical Paper 2013-05-13 2013 10.4271/2013-01-1875
- Tonosaki , H. , Yamashita , H. , and Nakada , T. Investigations into the Excitation of Low Frequency Half Order Vibrations in a Diesel Passenger Car Powertrain SAE Technical Paper 1993-05-01 1993 10.4271/931304
- Ide , S. , Uchida , T. , Ozawa , K. , and Izawa , K. Improvement of Engine Sound Quality through a New Flywheel System Flexiby Mounted to the Crankshaft SAE Technical Paper 1990-02-01 1990 10.4271/900391
- Okamura , H. , Sogabe , K. , and Takeo Experiments and Analyses of the Three-Dimensional Vibrations of the Crankshaft and Torsional Damper in a Four-Cylinder In-Line High Speed Engine SAE Technical Paper 1997-05-20 1997 10.4271/971996