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Power Steering Pump with Enhanced Cold Start Priming
Technical Paper
2001-01-1422
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The objective of the present work was to improve the cold start NVH performance of an automotive power steering pump under low temperature conditions. This objective was accomplished through the use experimental study and measurement.
The satisfactory operation of a fixed displacement vane pump in cold temperatures depends on a number of factors including; (1) filling characteristics, (2) the inlet conditions to the pump, (3) the fluid, and (4) the ability of the vanes to maintain contact with the cam surface.
In this investigation, factor (4) was chosen for investigation. A unique outlet orifice was designed and tested at three different operating ambient temperatures, -19 °C, -29 °C, and -40 °C. Maximum “noise” duration was measured as the maximum duration of fluid borne pump outlet pressure oscillations greater the 345 kPa peak-to-peak.
The results show that noise duration can reduced by as much as 50% at -40 °C. Selected results of this experimental study are presented and discussed.
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Topic
Citation
Bishop, L. and Abraham, J., "Power Steering Pump with Enhanced Cold Start Priming," SAE Technical Paper 2001-01-1422, 2001, https://doi.org/10.4271/2001-01-1422.Also In
References
- Gettel, Roger W. “Viscosity Sensitive Hydraulic Pump Flow Control”
- Blackburn, John F. “Fluid Power Control” The M.I.T. Press 1969