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

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Wang, Jiuhong Lu, Dejiang Jiang, Zhuangde
Copyright Year	2007
Abstract	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.
Sponsorship	Nanotechnology Institute
Starting Page	569
Ending Page	573
Page Count	5
File Format	PDF
ISBN	0791842657
DOI	10.1115/MNC2007-21536
e-ISBN	0791837947
Volume Number	First International Conference on Integration and Commercialization of Micro and Nanosystems, Parts A and B
Conference Proceedings	2007 First International Conference on Integration and Commercialization of Micro and Nanosystems
Language	English
Publisher Date	2007-01-10
Publisher Place	Sanya, Hainan, China
Access Restriction	Subscribed
Subject Keyword	Micro engine Sliding chute and crank mechanism Structure design Mems Porting parameters Microelectromechanical systems Computers Structural design Compression Dimensions Piston engines Modeling Space utilization (design) Engines Displacement Exhaust systems Design Pistons Electric power generation Gates (closures) Internal combustion engines Energy generation Plates (structures) Manufacturing Testing
Content Type	Text
Resource Type	Article

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