This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Analysis of Frequencies in Steering Systems Tubes By Pressure Peaks In Bench Test
Technical Paper
2012-36-0129
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
One of the most common complaints about noise in small vehicles is related to the hydraulic steering pump, which is strongly used during parking maneuvers, and produces a noise that overcomes the one coming from the engine, due to its low speed. This noise can be eliminated by the introduction of two resonators inside the high-pressure tube designed to coincide with the tube's resonance frequency. Here I present a bench test for measuring and evaluating the resonance frequencies of high-pressure tubes of hydraulic steering systems with and without resonators, and the resulting attenuation level of the steering pump noise by measuring the pressure peaks at the entry and outlet of the tube. Adopting this bench test eliminates some confounding variables that can interfere with the measurement such as engine vibration, others components' frequency orders (the engine itself, compressor, alternator, etc.), speed control, among others. Through this bench test it is possible to evaluate the hydraulic steering system in isolation, to speed up the pump by a constant acceleration and to collect the data on pressure peaks by FFT for posterior analysis. In this paper I present the bench test and the results obtained with a tube with and without resonators, in comparison with the predicted results.
Authors
Citation
Ribeiro, B., "Analysis of Frequencies in Steering Systems Tubes By Pressure Peaks In Bench Test," SAE Technical Paper 2012-36-0129, 2012, https://doi.org/10.4271/2012-36-0129.Also In
References
- KLEES, G.T. Attenuating Device U.S. Patent 3 323 305 June 1967
- KANIZAWA, F. RIBEIRO, B. BITENCOURT, R. PRADO, M. et al. Theoretical and Experimental Study of Noise Attenuation in Hydraulic Power Steering Systems SAE Brazil Congress 2010 São Paulo, SP, Brazil SAE Technical Paper 2010-36-0265 2010 10.4271/2010-36-0265
- BRAGA, M. KIMURA, M. THIEME, F. GERGES, S.N.Y Modelagem e Ensaios de Silenciador Veicular GERGES, S.N.Y Ruídos e Vibrações Veiculares Florianópolis S.N.Y. Gerges 2005 503 549 QATU, M.S. DOUGHERTY, M.L. Sr. SMID, G.E. Effects Of Tuner Parameters On Hydraulic Noise And Vibration Noise & Vibration Conference & Exposition Traverse City, MI, USA SAE Technical Paper 1999-01-1776 1999 10.4271/1999-01-1776
- SEYBERT, A.F. ROSS, D.F. Experimental Determination of Acoustic Properties Using a Two-Microphone random-excitation technique Journal of the Acoustical Society of America 1362 1370 May 1977
- SEYBERT, A.F. Two-Sensor Method for the Measurement of Sound Intensity and Acoustic Properties in Ducts Journal of the Acoustical Society of America 2233 2239 June 1988