Fluidic Control of a Hydrostatic Transmission in a Vehicle Propulsion System

[+] Author and Article Information
K. N. Reid, R. L. Woods

School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, Okla.

J. Dyn. Sys., Meas., Control 95(2), 114-123 (Jun 01, 1973) (10 pages) doi:10.1115/1.3426662 History: Received August 02, 1972; Online July 13, 2010


A vehicle propulsion system is considered which consists of an engine, hydrostatic transmission, and automatic controller. Control requirements are established for optimum or near optimum operation based on a steady-state performance index. Various controller classes are identified and a systematic method for synthesis of the “best” controller is outlined. A unique fluidic controller is discussed which adjusts the transmission ratio to maintain a specified engine speed-engine load relationship which maximizes overall system efficiency for a wide range of external load conditions.

Copyright © 1973 by ASME
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