Abstract
This paper presents an ongoing project of developing a micro reciprocating internal combustion engine. The engine is designed on the basis of a two stroke piston engine, but heavy modifications have been made to suit the 2D MEMS fabrication. All the engine parts are located in two layers. Piston seals are not used and leakage is prevented by the introduction of microgrooves on the piston, tight tolerance control and an extended contact area between the piston and the cylinder. With the assistance of a film of lubrication oil, these measures prove effective in preventing leakage. A new approach has been developed to fabricate high temperature resistant engine components at low cost. The approach relies on the UltraThick SU-8 Process (UTSP) to make micromoulds; then ceramic and metallic engine components can be produced based on the moulds. The UTSP is a UV lithography process for producing up to 1000 ?m thick SU-8 layers and the quality of the fabrication results can be compared with those made by using X ray exposure process in the same thickness. A complete microengine has been fabricated in SU-8 using the UTSP for test drive. High quality ceramic and metallic components have been produced based on the SU-8 moulds, proving the new approach is feasible for building
Highlights
Most liquid hydrocarbon fuels possess over 300 times more energy per unit weight than a NiCad battery and 100 times more than a Li-ion battery [1]
This paper presents the research work on the development of a micro reciprocating combustion engine
Significant modification of a two stroke engine has been made in the design to accommodate the 2D feature of MEMS fabrication
Summary
W artykule przedstawiono realizowany projekt rozwoju konstrukcji t3okowego mikrosilnika spalinowego. Metoda ta polega na zastosowaniu procesu o nazwie UltraThick SU-8 Process, nazywanego w skrócie UTSP do wytwarzania mikroform; nastêpnie przy wykorzystaniu tej formy mo¿na wytwarzaæ ceramiczne i metalowe elementy silnika. A new approach has been developed to fabricate high temperature resistant engine components at low cost. The approach relies on the UltraThick SU-8 Process (UTSP) to make micromoulds; ceramic and metallic engine components can be produced based on the moulds. High quality ceramic and metallic components have been produced based on the SU-8 moulds, proving the new approach is feasible for building durable micro hot engines at a low cost. Oszacowanie oparte na wartoœci energetycznej paliw wêglowodorowych wykazuje, ¿e gdyby mikrosilnik przetwarza energiê ze sprawnoœci rzêdu 10%, co jest poni¿ej wartoœci osi1ganej przez dobry silnik samochodowy, to móg3by byæ stosowany do zasilania telefonu komórkowego wymagaj1-
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