Difference between revisions of "Desmodromic valve"

Desmodromic valve (edit)

Revision as of 14:59, 9 August 2010

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→‎Design and history

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 ==Design and history==
-<!-- Deleted image removed: [[Image:Bluming desmo 8x6.jpg|thumb|right|250px|{{deletable image-caption|Sunday, 1 November 2009}}<br/>  Annotated diagram of a typical desmodromic valve.]] -->
 Fully controlled valve movement was thought of in the earliest days of engine development, but devising a system that worked reliably and was not overly complex took a long time. Desmodromic valve systems are first mentioned in patents in 1896 by Gustav Mees, and in 1907 the [[Ariès]] is described as having a V4 engine with "desmodromique" valve actuation, but details are scarce. The 1914 Grand Prix [[Delage]] used a desmodromic valve system (quite unlike the present day [[Ducati Motor Holding|Ducati]] system).<ref>[http://members.chello.nl/~wgj.jansen/] Jansen ''Desmodromology'' (Retrieved 31 October 2006)</ref>
-Azzariti, a short lived Italian manufacturer from 1933 to 1934, produced {{convert|173|cc|ml|abbr=on}} and 348&nbsp;cc twin cylinder engines, some of which had desmodromic valve gear, with the valve being closed by a separate camshaft.<ref>Title: The Illustrated Encyclopedia of Motorcycles, Editor: Erwin Tragatsch, Publisher: New Burlington Books, Copyright: 1979 Quarto Publishing, Edition:  1988 Revised, Page 81, ISBN 0-906286-07-7</ref>
+Azzariti, a short lived Italian manufacturer from 1933 to 1934, produced 173cc and 348&nbsp;cc twin cylinder engines, some of which had desmodromic valve gear, with the valve being closed by a separate camshaft.<ref>Title: The Illustrated Encyclopedia of Motorcycles, Editor: Erwin Tragatsch, Publisher: New Burlington Books, Copyright: 1979 Quarto Publishing, Edition:  1988 Revised, Page 81, ISBN 0-906286-07-7</ref>
-The [[Mercedes-Benz W196]] [[Formula One]] racing car of 1954-55, and the [[Mercedes-Benz 300SLR]] sports racing car of 1955 both had desmodromic valve actuation.
 In 1956, [[Fabio Taglioni]], a Ducati engineer, developed a desmodromic valve system for the Ducati 125 Grand Prix, creating the Ducati 125 Desmo.