Hydraulic regeneration systems have been considered by the automotive industry for implementation in hybrid vehicles for a number of years. The combination of an internal combustion engine and an energy storage device has great potential for improving vehicle performance and fuel economy as well as reducing brake wear. This study describes an analytical model of a hydraulic regeneration system consisting of an accumulator, an oil reservoir, a variable-displacement pump/motor, connecting lines and a flywheel which is used to simulate vehicle inertia. An integration algorithm is used to simultaneously solve the governing equations and predict the system performance. Variables including accumulator pressure and temperature, pump/motor torque and efficiencies, pressure losses, and flywheel speed as functions of time are predicted. Power losses and round-trip efficiencies can be readily determined once the system performance variables have been calculated.
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March 1992
Research Papers
Modeling of a Hydraulic Energy Regeneration System: Part I—Analytical Treatment
A. Pourmovahed,
A. Pourmovahed
Power Systems Research Department, General Motors Research Laboratories, Warren, MI 48090
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N. H. Beachley,
N. H. Beachley
Mechanical Engineering Department, University of Wisconsin-Madison, Madison, WI 53706
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F. J. Fronczak
F. J. Fronczak
Mechanical Engineering Department, University of Wisconsin-Madison, Madison, WI 53706
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A. Pourmovahed
Power Systems Research Department, General Motors Research Laboratories, Warren, MI 48090
N. H. Beachley
Mechanical Engineering Department, University of Wisconsin-Madison, Madison, WI 53706
F. J. Fronczak
Mechanical Engineering Department, University of Wisconsin-Madison, Madison, WI 53706
J. Dyn. Sys., Meas., Control. Mar 1992, 114(1): 155-159 (5 pages)
Published Online: March 1, 1992
Article history
Received:
March 22, 1990
Revised:
March 1, 1991
Online:
March 17, 2008
Connected Content
A companion article has been published:
Modeling of a Hydraulic Energy Regeneration System: Part II—Experimental Program
Citation
Pourmovahed, A., Beachley, N. H., and Fronczak, F. J. (March 1, 1992). "Modeling of a Hydraulic Energy Regeneration System: Part I—Analytical Treatment." ASME. J. Dyn. Sys., Meas., Control. March 1992; 114(1): 155–159. https://doi.org/10.1115/1.2896497
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