Motion control of a hydraulic free-piston engine

2012 ◽  
Author(s):  
Ke Li ◽  
A. Sadighi ◽  
Zongxuan Sun
Keyword(s):  
Motion Control ◽  
Piston Engine ◽  
Free Piston ◽  
Free Piston Engine

scholarly journals Piston motion control of a free-piston engine generator: A new approach using cascade control

2016 ◽  
Vol 179 ◽  
pp. 1166-1175 ◽  
Author(s):  
Boru Jia ◽  
Rikard Mikalsen ◽  
Andrew Smallbone ◽  
Zhengxing Zuo ◽  
Huihua Feng ◽  
...  
Keyword(s):  
Motion Control ◽  
Cascade Control ◽  
Piston Engine ◽  
Piston Motion ◽  
Free Piston ◽  
New Approach ◽  
Free Piston Engine

scholarly journals A Reciprocating Motion Control Strategy of Single-Cylinder Free-Piston Engine Generator

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 245 ◽  
Author(s):  
Hao Yan ◽  
Zhaoping Xu ◽  
Jinkang Lu ◽  
Dong Liu ◽  
Xiaohui Jiang
Keyword(s):  
Motion Control ◽  
Control Strategy ◽  
Electrical Power ◽  
Reciprocating Motion ◽  
Piston Engine ◽  
Free Piston ◽  
Free Piston Engine ◽  
Finite State ◽  
Turning Center ◽  
Combined Simulation

Free-piston engine generator is a novel electrical power generating system developed for electric vehicles, and it is labeled as a more efficient power system than conventional engines. This paper proposes a reciprocating motion control strategy of free piston to enable the stable running of the system. The control problem was decomposed to the stroke control, the top turning center (TTC) control, and the bottom turning center (BTC) control for reducing unnecessary energy consumption during the control. An iterative learning controller (ILC) was designed for the TTC control, the BTC control was based on the combustion states estimation, and the stroke control was based on finite-state machine (FSM). The turning centers of the previous stroke and the maximum cylinder pressure of the current stroke were taken for feedback. A combined simulation model including the combustion cycle fluctuation was presented and validated by the prototype, and the performance of the control strategy was analyzed. The results showed that the system obtained the stable running and the reciprocating motion of the free piston was well controlled.

scholarly journals Hydraulic Free Piston Engine Enabled by Active Motion Control

2013 ◽  
Vol 135 (06) ◽  
pp. S7-S9 ◽  
Author(s):  
Ke Li ◽  
Zongxuan Sun
Keyword(s):  
Motion Control ◽  
High Efficiency ◽  
Motion Controller ◽  
Piston Engine ◽  
Piston Motion ◽  
Free Piston ◽  
Engine Operation ◽  
Active Motion ◽  
Functional Aspects ◽  
Free Piston Engine

This article explores various functional aspects of hydraulic free piston engine (FPE) enabled by action motion control. Given the potential for high efficiency and flexibility, the FPE is well suited for mobile applications such as on-road vehicles and off-road heavy machinery. The advantage of the active motion controller lies in its ability to precisely track and shape the piston trajectory. FPE has a great potential for energy saving and emission control, but its reliable operation is limited by the complex dynamic coupling among the engine subsystems and the lack of the crankshaft. This inherent technical barrier for FPE could be overcome by active control with today’s sensing, actuation and computing technologies. A prototype hydraulic FPE is used to demonstrate the capabilities of active piston motion control. Experimental results demonstrate the feasibility and promise of the technology. Engine power control will be combined with piston motion control in the future to achieve a wider range of engine operation and higher engine efficiency.

Feasibility of Multiple Piston Motion Control Approaches in a Free Piston Engine Generator

2019 ◽  
Author(s):  
Mehar Bade ◽  
Nigel Clark ◽  
Parviz Famouri ◽  
PriyaankaDevi Guggilapu
Keyword(s):  
Motion Control ◽  
Piston Engine ◽  
Piston Motion ◽  
Free Piston ◽  
Free Piston Engine

Active Motion Control of a Hydraulic Free Piston Engine

2014 ◽  
Vol 19 (4) ◽  
pp. 1148-1159 ◽  
Author(s):  
Ke Li ◽  
Ali Sadighi ◽  
Zongxuan Sun
Keyword(s):  
Motion Control ◽  
Piston Engine ◽  
Free Piston ◽  
Active Motion ◽  
Free Piston Engine
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