Editing V20 engine

{{Short description|Piston engine with two banks of ten cylinders in a "V" configuration}}
A '''V20 engine''' is a twenty-cylinder [[Internal_combustion_engine#Reciprocating_engines|piston engine]] where two banks of ten cylinders are arranged in a [[V engine|V configuration]] around a common crankshaft. Large diesel V20 engines have been used in [[diesel locomotive]]s, [[haul truck]]s, [[electric generator]]s and marine applications.

== History ==
[[File:Aeronauticum DieselmMotor MB 511 144And8more.jpg|right|thumb|Mercedes-Benz ''MB 511'' marine diesel engine]]

Beginning in the late-1930s, [[Mercedes-Benz]] produced several large V20 diesel engines for use in marine applications. The first engine was the ''MB 501'' which was based on the ''MB 500'' V12 engine and was installed in the 1937 class [[Schnellboot]] (fast attack boat) and several submarines.<ref name="oldmachinepress.com">{{cite web |title=Mercedes-Benz 500 Series Diesel Marine Engines |url=https://oldmachinepress.com/2017/03/05/mercedes-benz-500-series-diesel-marine-engines/ |website=www.oldmachinepress.com |access-date=27 July 2020 |language=en |date=5 March 2017}}</ref><ref>{{cite web |title=Maus Engine |url=http://ftr.wot-news.com/2014/11/25/maus-engine-by-captiannemo/ |website=www.wot-news.com |access-date=27 July 2020}}</ref> Later versions included the supercharged ''MB 511'' engine and the ''MB 518'', which also added an intercooler. A copy of the MB 511 was produced by VEB Motorenwerk in Ludwigsfelde and called the ''VEB 20 KVD 25''. Production of the MB 518 resumed in 1951,<ref name="oldmachinepress.com"/> and a version of the engine was also manufactured by [[MTU Friedrichshafen|MTU]], called the ''MB 20 V 672''.{{citation needed|date=July 2020}} 

The [[Electro-Motive Diesel]] [[EMD 645|EMD 645E3]] two-stroke V20 turbo-diesel engine was used in 1960s diesel-electric locomotives such as the [[EMD SD45]]. The engine has a displacement of {{convert|211|L|cuin|0|abbr=on}} and produces a net traction of {{convert|3600|hp|MW|1|abbr=on|order=flip}}.<ref>{{cite book|last=Pinkpank|first=Jerry A|title=The Second Diesel Spotter's Guide|year=1973|publisher=Kalmbach Books|isbn=0-89024-026-4|pages=26, 77–84}}</ref><ref>{{cite book|last1=Pinkepank|first1=Jerry A.|last2=Marre|first2=Louis A.|title=Diesel Spotters Guide Update|year=1979|publisher=Kalmbach Books|isbn=0-89024-029-9|pages=50–51, 59–62}}</ref><ref>{{cite book|editor-first=David|editor-last=Ross|title=The Encyclopedia of Trains and Locomotives|year=2003|publisher=Barnes & Nobel|isbn=978-0-7607-9679-5|page=342}}</ref> The maximum gross power output is closer to 5,000&nbsp;hp when operated in self-test mode (with the generated output being dissipated by resistors). Later versions of the EMD 645 engine were used in the [[EMD SD45-2]] and [[EMD SD45T-2]] locomotives. [[Electro-Motive Diesel|EMD]] also produces a V20 version of the [[EMD 710]] diesel engine, which was used in the 1995 [[EMD SD80MAC]] locomotive.<ref>{{cite web|url=http://www.sd80mac.com/|title=Conrail Cadillacs: The SD80MAC|website=www.sd80mac.com|access-date=30 October 2018}}</ref><ref>{{cite book|editor-first=David|editor-last=Ross|title=The Encyclopedia of Trains and Locomotives|year=2003|publisher=Barnes & Nobel|isbn=978-0-7607-9679-5|pages=368–369}}</ref>  The EMD 710 remains in production to this day,{{citation needed|date=July 2020}} and is mostly used in power generation and marine propulsion.

The [[Detroit Diesel Series 149]] 20V149 has an output of 2,936 hp (2,189 kW) from a capacity of 2,980 cu in (48.8 L). It was discontinued in 2000. 

Current production V20 diesel engines include the [[Fairbanks Morse]] FM | MAN 28/33D STC, FM | MAN 32/44CR, FM | MAN 175D, FM | COLT-PIELSTICK PA6B STC. Others are the ''[[Wärtsilä]] 20V32'' which produces up to {{convert|9.8|MW|hp|abbr=on}},<ref>{{cite web |title=Wärtsilä 32 - Engine generating set |url=https://cdn.wartsila.com/docs/default-source/Power-Plants-documents/downloads/product-leaflets/w32_leaflet.pdf?sfvrsn=2 |website=www.wartsila.com |access-date=27 July 2020 |format=PDF}}</ref> the ''MTU 20V1163'' 6 MW (8,045 hp)''MTU 20V4000'' 2.8 MW (3,755 hp), ''MTU 20V8000'' 10 MW (13,410 hp), Cummins 120.0L QSK120 (5,000 hp). [[Caterpillar C175|Caterpillar C175-20]] 4 MW (5,364 hp) and the G3520 series.

== See also ==
* [[V engine]]
* {{Commons inline|V20 engines}}

==References==
{{Reflist}}
{{Piston engine configurations}}

[[Category:V engines|20]]
[[Category:Locomotive engines]]
[[Category:Piston engine configurations]]
[[Category:20-cylinder engines]]