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Appl. Sci. 2018, 8(3), 347; https://doi.org/10.3390/app8030347

Dimensionless Energy Conversion Characteristics of an Air-Powered Hydraulic Vehicle

School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
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Received: 11 February 2018 / Revised: 22 February 2018 / Accepted: 23 February 2018 / Published: 28 February 2018
(This article belongs to the Special Issue Power Transmission and Control in Power and Vehicle Machineries)
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Abstract

Due to the advantages of resource conservation and less exhaust emissions, compressed air-powered vehicle has attracted more and more attention. To improve the power and efficiency of air-powered vehicle, an air-powered hydraulic vehicle was proposed. As the main part of the air-powered hydraulic vehicles, HP transformer (short for Hydropneumatic transformer) is used to convert the pneumatic power to higher hydraulic power. In this study, to illustrate the energy conversion characteristics of air-powered hydraulic vehicle, dimensionless mathematical model of the vehicle’s working process was set up. Through experimental study on the vehicle, the dimensionless model was verified. Through simulation study on the vehicle, the following can be obtained: firstly, the increase of the hydraulic chamber orifice and the area ratio of the pistons can lead to a higher output power, while output pressure is just the opposite. Moreover, the increase of the output pressure and the aperture of the hydraulic chamber can lead to a higher efficiency, while area ratio of the pistons played the opposite role. This research can be referred to in the performance and design optimization of the HP transformers. View Full-Text
Keywords: hydropneumatic transformer; air-powered vehicle; working characteristic; modelling simulation; experimental study hydropneumatic transformer; air-powered vehicle; working characteristic; modelling simulation; experimental study
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Shen, D.; Chen, Q.; Wang, Y. Dimensionless Energy Conversion Characteristics of an Air-Powered Hydraulic Vehicle. Appl. Sci. 2018, 8, 347.

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