As a novel alternative of internal combustion engine (ICE), the free piston engine (FPE) eliminates the mechanical crankshaft and the associated constraints on its piston motion. Due to this extra degree of freedom and reduced inertia, the FPE is able to generate variable output power with higher efficiency and less emissions, while possessing a short response time. Hence, a hydraulic FPE (HFPE), which combines the FPE with a linear hydraulic pump, is a promising candidate as a fluid power source, especially for mobile applications. In this paper, such potential is investigated. The working principle of a prototype HFPE as a fluid power source is described and a comprehensive HFPE model is developed. Two novel control methods are proposed to regulate the output flow rate at any given load pressure so as to realize throttle-less fluid power control. Effectiveness of these two methods are demonstrated through simulation, where results clearly show the effectiveness of both methods in providing different output flow rates at given load pressure, thus demonstrating the HFPE's capability as an efficient and flexible mobile fluid power source.
|Original language||English (US)|
|Title of host publication||Mechatronics; Mechatronics and Controls in Advanced Manufacturing; Modeling and Control of Automotive Systems and Combustion Engines; Modeling and Validation; Motion and Vibration Control Applications; Multi-Agent and Networked Systems; Path Planning and Motion Control; Robot Manipulators; Sensors and Actuators; Tracking Control Systems; Uncertain Systems and Robustness; Unmanned, Ground and Surface Robotics; Vehicle Dynamic Controls; Vehicle Dynamics and Traffic Control|
|Publisher||American Society of Mechanical Engineers|
|State||Published - 2016|
|Event||ASME 2016 Dynamic Systems and Control Conference, DSCC 2016 - Minneapolis, United States|
Duration: Oct 12 2016 → Oct 14 2016
|Name||ASME 2016 Dynamic Systems and Control Conference, DSCC 2016|
|Other||ASME 2016 Dynamic Systems and Control Conference, DSCC 2016|
|Period||10/12/16 → 10/14/16|
Bibliographical noteFunding Information:
The authors would like to thank the NSF Center for Compact and Efficient Fluid Power (CCEFP) for the financial support and Ford Motor Company for donating the free piston engine.
Copyright © 2016 by ASME.
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