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Hydrostatic Transmissions Controls - Is There Space for Optimization?
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English
Abstract
Efficiency characteristics are considered of simple control types (constant pressure and constant power) applied to a variable displacement pump as single unit or in connexion with a fixed displacement motor or a dummy actuator (having efficiency features of a transmission line). The most efficient way to implement a specific control is identified in terms of speed and displacement, while basic control parameters result from the optimization of maximum or mean efficiency. Some effects of controls on driving engine fuel consumption and sizing are also discussed. Computations are based on efficiency models devised by authors as approximation of a number (sometime large) of reference data, and carried out with an original Non-Linear Programming code (FALL77).
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Citation
Zarotti, G., Nervegna, N., and Miotto, G., "Hydrostatic Transmissions Controls - Is There Space for Optimization?," SAE Technical Paper 780465, 1978, https://doi.org/10.4271/780465.Also In
References
- O'Sullivan D.T. Knoelker H.D. “Developments in hydraulic equipment and controls on earthmoving and construction machines” Fluid Power International Conference London June 1972
- Thoma J. Milano 1968
- Edghill C.M. “Some factors determining the choice of a particular hydrostatic transmission unit” BHRA 1st Fluid Power Symposium Cranfield (England - UK) January 1969
- Zarotti G.L. Nervegna N. “Hydraulic torque converters design” 6th Australasian Hydraulics and Fluid Mechanics Conference Adelaide (Australia) December 1977
- Zarotti G.L. Nervegna N. “Hydrodynamic transmissions parameters optimization” (paper 770557 ) SAE Earthmoving Industry Conference Peoria (Ill - USA) April 1977