Transfer Characteristic Research of Power Assisted Steering Pump Noise
The characteristics of hybrid electric vehicles’ noise and vibration are different when compared with traditional vehicles, especially in idle condition. Taking the noise level of driver location as reference, this paper investigates the influence of noise of power assisted steering pump equipped in a HEV under idle condition, and figure out how it transfers into cavity using spectrum analysis, vibrational energy transfer analysis, and FRF (frequency response function) analysis etc. It is proved that air-borne noise rather than structure-borne noise is the main source. Test verification is consistent with the analysis result, and appropriate acoustic treatment can be effective in improving the noise level inside the vehicle in idle condition.
E. B. Wang et al., "Transfer Characteristic Research of Power Assisted Steering Pump Noise", Key Engineering Materials, Vols. 439-440, pp. 384-389, 2010