Experimental validation of a soft switch for a virtually variable displacement pump

Brandon K. Beckstrand, James D. Van De Ven

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

As an alternative to a variable displacement pump, a fixed displacement pump can be made to function as a virtually variable displacement unit by using a high-speed valve to pulse-width modulate the flow, creating a switch-mode circuit. A major drawback of switch-mode circuits is throttling and compressibility energy losses during valve transitions. One method of minimizing these losses is soft switching, where the flow that would normally be throttled across the high speed valve during transitions is absorbed in a small variable volume chamber. The concept for a novel soft switch mechanism that uses the pressure signal at the exit of the pump to release a lock on the soft switch chamber was previously presented. This paper describes the soft switch concept in more detail and outlines a numerical model used to predict and optimize soft switch operation. Experimental results are presented that demonstrate proper operation of the soft switch lock-release mechanism.

Original languageEnglish (US)
Title of host publicationASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014
PublisherWeb Portal ASME (American Society of Mechanical Engineers)
ISBN (Electronic)9780791845974
DOIs
StatePublished - Jan 1 2014
EventASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014 - Bath, United Kingdom
Duration: Sep 10 2014Sep 12 2014

Other

OtherASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014
CountryUnited Kingdom
CityBath
Period9/10/149/12/14

Fingerprint

Switches
Pumps
Networks (circuits)
Compressibility
Numerical models
Energy dissipation

Cite this

Beckstrand, B. K., & Van De Ven, J. D. (2014). Experimental validation of a soft switch for a virtually variable displacement pump. In ASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014 Web Portal ASME (American Society of Mechanical Engineers). https://doi.org/10.1115/FPMC2014-7857

Experimental validation of a soft switch for a virtually variable displacement pump. / Beckstrand, Brandon K.; Van De Ven, James D.

ASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014. Web Portal ASME (American Society of Mechanical Engineers), 2014.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Beckstrand, BK & Van De Ven, JD 2014, Experimental validation of a soft switch for a virtually variable displacement pump. in ASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014. Web Portal ASME (American Society of Mechanical Engineers), ASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014, Bath, United Kingdom, 9/10/14. https://doi.org/10.1115/FPMC2014-7857
Beckstrand BK, Van De Ven JD. Experimental validation of a soft switch for a virtually variable displacement pump. In ASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014. Web Portal ASME (American Society of Mechanical Engineers). 2014 https://doi.org/10.1115/FPMC2014-7857
Beckstrand, Brandon K. ; Van De Ven, James D. / Experimental validation of a soft switch for a virtually variable displacement pump. ASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014. Web Portal ASME (American Society of Mechanical Engineers), 2014.
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