Abstract
A novel pressure-controlled hydro-mechanical transmission (PHMT) is studied in this paper. The PHMT consists of a pressure-controlled hydraulic transmission (PCT) and a variable displacement hydraulic motor. The PCT functions like a conventional hydrostatic transmission (HST) but has a different form. It uses a double-acting vane pump with a floating ring. By coupling the floating ring to an output shaft, the vane pump becomes a hydraulic transmission. The PCT combines the pumping and motoring functions in one unit, making it much simpler than a conventional HST. By controlling the pressure in the PCT, the output shaft torque and speed can be adjusted. By feeding the PCT control flow to a variable displacement motor coupled to the PCT output shaft, a PHMT is constituted. In this paper, the fundamental principle of the PHMT is studied. To demonstrate its advantage, the PHMT is applied to a fan drive system and the transmission efficiency is compared to a conventional HST. Preliminary experimental results show that the input power of the fan drive system with a PHMT is lower than that with an HST given the same output fan speed and torque.
Original language | English (US) |
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Title of host publication | ASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014 |
Publisher | Web Portal ASME (American Society of Mechanical Engineers) |
ISBN (Electronic) | 9780791845974 |
DOIs | |
State | Published - 2014 |
Event | ASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014 - Bath, United Kingdom Duration: Sep 10 2014 → Sep 12 2014 |
Publication series
Name | ASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014 |
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Other
Other | ASME/BATH 2014 Symposium on Fluid Power and Motion Control, FPMC 2014 |
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Country/Territory | United Kingdom |
City | Bath |
Period | 9/10/14 → 9/12/14 |
Bibliographical note
Publisher Copyright:Copyright © 2014 by ASME.