In order to improve the NVH performance of the timing housing of a gasoline engine specific for a range extender,several support bosses were added locally to the timing housing,which significantly improves the dynamic stiffness of the timing housing,and at the same time effectively reduces the vibration response and deformation per unit of excitation,so as to reduce the noise of the range extender assembly 1 m from the engine front-end side in the full-load acceleration condition by 4.0 dB(A),the linearity of the noise SPL and the acceleration of the vibration of the timing housing were significantly improved.The validation results show that improving the dynamic stiffness can effectively improve the noise radiation from the structural vibration of thin-walled parts.
关键词
增程器正时罩壳/动刚度/频响函数/变形量/NVH
Key words
Range extender timing housing/Dynamic stiffness/Frequency response function/Deformation/NVH
维普
万方数据