Editing Indirect injection (section)

====Swirl chamber====
[[File:Ricardo comet combustion.gif|thumb|left|Ricardo Comet swirl chamber]]
Swirl chambers are spherical cavities located in the cylinder head and separated from the engine cylinder by a tangential throat. About 50% of the air enters the swirl chamber during the compression stroke of the engine, producing a swirl.<ref>{{cite book|title=Electromechanical Prime Movers: Electric Motors|url=https://books.google.com/books?id=9lNdDwAAQBAJ&pg=PA21|date=18 June 1971|publisher=Macmillan International Higher Education|isbn=978-1-349-01182-7|pages=21–}}{{Dead link|date=September 2024 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
After combustion, the products return through the same throat to the main cylinder at much higher velocity, so more heat is lost to the walls of the passage. This type of chamber finds application in engines in which fuel control and engine stability are more important than fuel economy. These are also called Ricardo chambers, named after the inventor, [[Harry Ricardo|Sir Harry Ricardo]].<ref name="oldengine">{{cite web|url=http://www.oldengine.org/members/diesel/misc/ricardo.htm |publisher=oldengine.org |title=Sir Harry Ricardo |access-date=8 January 2017 |url-status=dead |archive-url=https://web.archive.org/web/20101017023809/http://www.oldengine.org/members/diesel/misc/ricardo.htm |archive-date=17 October 2010 }}</ref><ref name="google">{{cite book|title=Troubleshooting and Repairing Diesel Engines|author=Dempsey, P.|date=1995|publisher=TAB Books|isbn=9780070163485|url=https://books.google.com/books?id=5nHW-USbN6wC&pg=PA127|page=127|access-date=8 January 2017}}</ref>