Design Approach for a Two-Stroke Free Piston Engine for Electric Power Generation

2004 ◽  
Author(s):  
F. Caresana ◽  
G. Comodi ◽  
L. Pelagalli
Keyword(s):  
Power Generation ◽  
Electric Power ◽  
Design Approach ◽  
Piston Engine ◽  
Electric Power Generation ◽  
Free Piston ◽  
Free Piston Engine

Structural Design and Porting Parameters Calculation of a Micro Piston Engine for Power Generation

2007 ◽  
Author(s):  
Jiuhong Wang ◽  
Dejiang Lu ◽  
Zhuangde Jiang
Keyword(s):  
Power Generation ◽  
Electric Power ◽  
Mechanical Energy ◽  
Connecting Rod ◽  
Generation System ◽  
Piston Engine ◽  
Electric Power Generation ◽  
Exhaust Port ◽  
Power Generation System ◽  
Phase Angles

In this paper, a new type micro piston internal combustion engine is reported. The micro engine can be used to provide mechanical energy for micro electric power generation system. It is consisted of three or four planar plate structure. This micro engine has special advantages in structure which are more suitable to minimize whole engine to MEMS dimensions than traditional engines. Compared with traditional or other existing micro piston engines, there is a sliding chute and crank mechanism rather than a crank and connecting rod mechanism to improve the space utilization ratio. The crank is fixed on the plate next to the main body plate of the engine. A free piston micro engine without the crank and connecting rod mechanism is given too. Scheme of structure, operation and characters of the micro engine are described in detail. The displacement, velocity and acceleration functions of piston are deduced to understand the rules of piston motion. Calculating formulas of porting parameters are deduced too. Finally, an example of the micro engine with specific design parameters is given. Mathematic modeling of the porting parameters is built. The calculation results show that the phase angles of the inlet, scavenging port and the exhaust port of the example engine are respectively of 21.78°, 156.27° and 158.39° under following conditions. Compression ratio is 5; working volume is 5mm3; length of stroke is 2mm; the sectional dimension of the piston is 2mm×1mm; and the value of revolution is 9000RPM. When the width of gas ports are all 1mm, the heights of inlet, scavenging port and exhaust port corresponding to the port phase angles above are respectively 72μm, 85μm, and 70μm. According to the assembly testing on computer, it is shown that the micro piston engine presented here is workable, controllable and suitable for MEMS fabrication in structure. It can be used as device to provide mechanical energy for micro electric power generation system.

Design Approach and Dimensionless Analysis of a Differential Driving Hydraulic Free Piston Engine

2016 ◽  
Author(s):  
Shuanlu Zhang ◽  
ZhenFeng Zhao ◽  
Changlu Zhao ◽  
Fujun Zhang ◽  
Yuhang Liu
Keyword(s):  
Design Approach ◽  
Piston Engine ◽  
Free Piston ◽  
Dimensionless Analysis ◽  
Free Piston Engine

An Investigation on Power Generation Characteristics of Linear Generator Driven by a Free-piston Engine

2021 ◽  
Author(s):  
Nguyen Huynh Thi ◽  
Nguyen Van Trang ◽  
Huynh Thanh Cong ◽  
Dao Huu Huy ◽  
Huynh Van Loc ◽  
...  
Keyword(s):  
Power Generation ◽  
Piston Engine ◽  
Free Piston ◽  
Linear Generator ◽  
Free Piston Engine

scholarly journals Free-Piston Engine Design and Evaluation with Different Compression Ratios

2021 ◽  
Vol 13 (3) ◽  
pp. 57-66
Author(s):  
B. KIRUBADURAI ◽  
G. JEGADEESWARI ◽  
K. KANAGARAJA
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Power Generation ◽  
Operating Performance ◽  
Research Groups ◽  
Piston Engine ◽  
Free Piston ◽  
Heat Engines ◽  
Free Piston Engine ◽  
Engine Design

Free-piston heat engines are being examined by a number of international research groups as an option for conservative technology, as they are not limited by the movement of the crankshaft as in conventional engines. The free-piston engines are employed in applications like power generation using conventional methods. The higher compression ratios provide higher cycle efficiencies and also boost in-cylinder temperatures increasing mechanical stress, pressures, and heat transfer losses. This paper presents different in-cylinder flows by computational fluid dynamics for various compression ratios ranges from 7 to 15 and estimates were made to find best compression ratio for the optimal engine operating performance and characteristic.

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