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Method for Objectively Evaluating Power Steering Pump Noise and its Correlation with Subjective Vehicle Feeling Judgment

Article of Honda R&D Technical Review Vol.20 No.1


It is challenging to evaluate the source noise characteristics of a power steering pump unit by the current one-pressure method. In this research, an effective evaluation system and a single indicator are developed, based on fluid dynamics in a pipe and 3-point pressure pulsation measurement. The value of the evaluation indicator, which is obtained from pump’s source flow ripples measured by the new evaluation system, is well correlated with the noise performance of power steering system in an actual vehicle. It is shown that the new evaluation system and indicator are valuable tools for investigating the pulsation characteristics of pump units, objective scaling of the source noise properties of steering systems and developing quiet power steering pumps and systems.


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