*simplicity of construction<ref name="novenia">[http://www.invenia.es/tech:05_pl_spop_0dwm Invenia]New-generation various fuel forms internal combustion engine - a review from Spain {{Webarchive|url=https://web.archive.org/web/20080325123047/http://www.invenia.es/tech:05_pl_spop_0dwm |date=2008-03-25 }}</ref><ref name="German">[http://www.bit.or.at/irca/bbsshow8.php?ref1=05%20PL%20SPOP%200DWM&vQuelle=&cc= BBS]A review from Germany {{Webarchive|url=https://web.archive.org/web/20090129150005/http://www.bit.or.at/irca/bbsshow8.php?ref1=05%20PL%20SPOP%200DWM&vQuelle=&cc= |date=2009-01-29 }}</ref>
The idea was developed at the [[Silesian University of Technology]], Poland, under the leadership of [[Adam Ciesiołkiewicz]].<ref name="kones">[http://www.ilot.edu.pl/Journal%20of%20KONES%202002%20No%201_2/01/str56.pdf Journal abstract] - Journal of KONES Internal Combustion Engines 2002 No. 1-2 {{ISSN|1231-4005}}, the official Polish educational site ('''Pdf'''){{dead link|date=October 2021}}</ref> It was granted the [[patent]] number 195052 by the Polish [[Patent Office]].<ref name="patent">[http://www.uprp.pl/wydawnictwa/wyd/bup_03/bup09_03/bup09_2003.pdf The Polish Patent Office newsletter]('''Polish, Pdf''') {{Webarchive|url=https://web.archive.org/web/20070125181513/http://www.uprp.pl/wydawnictwa/wyd/bup_03/bup09_03/bup09_2003.pdf |date=2007-01-25 }}</ref> The work with the new combustion engine has been done by IZOLING P.W. Company in cooperation with the Silesian University of Technology in Gliwice. Consultations with researchers from Technical University of Kraków were also held. So far, two working engine models have been made. The preliminary model is based on two existing engines (a two-stroke motorbike engine and a four-stroke small machine engine). This model confirms the concept of two- and four-stroke engines' connection. The second model is the functional model. <!-- It realizes the elaborated engine work conception. --> The new solution for a combustion engine was presented during scientific conferences (KONES '2002, Seminary of biofuels 2003, etc.) and in mass media (journals, newspapers, TVP, radio).
The hope to build a modern and universal ecological engine with good technical parameters and low fuel consumption is connected to the double-piston internal combustion engine.
