Two- and four-stroke engines: Difference between revisions

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{{Short description|Two-and-four stroke engines}}

'''Two- and- four-stroke engines''' are [[engines]] that combine elements from both [[Two-stroke engine|two-stroke]] and [[Four-stroke engine|four-stroke]] engines. They usually incorporate two [[piston]]s.

== M4+2 engine ==

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The other advantages are:

* moreMore efficient [[power (physics)|power]] production (150 [[horsepower]] from 1000 cc of volume in the basic version)

* abilityAbility to use different [[fuel]] types (natural plant oils as well as petroleum)

* more efficient [[power (physics)|power]] production (150 [[horsepower]] from 1000 cc of volume in the basic version)

* muchMuch better ecological effects – a huge reduction of [[carbon dioxide]] and other gases emission

* ability to use different [[fuel]] types (natural plant oils as well as petroleum)

* lowerLower fuel consumption

* much better ecological effects – a huge reduction of [[carbon dioxide]] and other gases emission

* prolongedProlonged stroke expansion

* lower fuel consumption

* possibilityPossibility to change the compression parameters without having to stop the engine

* prolonged stroke expansion

* simplicitySimplicity 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>

* possibility to change the compression parameters without having to stop the engine

* 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>Journal of KONES Internal Combustion Engines 2002 No. 1-2 {{ISSN|1231-4005}}, the official Polish educational site{{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] {{in lang|pl}} {{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).