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Mercedes-Benz OM642 engine

Field	Value
name	Mercedes-Benz OM642 engine
image	Mercedes-Benz OM642.jpg
manufacturer	Daimler AG
configuration	72° V6
production	2005–2021
predecessor	Mercedes-Benz OM648 engine
successor	Mercedes-Benz OM656 engine
VM A630 (VM Motori)
bore	83 mm
stroke	92 mm
displacement	2987 cc
weight	208 kg
block	Aluminium
head	Aluminium
valvetrain	DOHC 4 valves x cyl.
turbocharger	Variable nozzle Garrett GT2056VK, GTB2060VKLR, GTB2260VKLR
fuelsystem	Common rail direct injection
fueltype	Diesel
coolingsystem	Water cooled
power	European models: 195 kW. US vehicles: 157 kW. Mercedes/Dodge Sprinter, x280 CDI models: 140 kW. Mercedes-Benz G-Class (W461) G280/G300 CDI: 135 kW.
torque	European models: 620 Nm. US vehicles: 540 Nm. Mercedes/Dodge Sprinter, x280 CDI models: 440 Nm.
Mercedes-Benz G-Class (W461) G280/G300 CDI: {{convert	400	Nm	lbft	0	abbr	on}}.
compression	18.0:1

VM A630 (VM Motori) Mercedes-Benz G-Class (W461) G280/G300 CDI: 400 Nm.

The Mercedes-Benz OM642 engine is a 2987 cc, 24-valve, aluminium/aluminium block and heads diesel 72° V6 engine manufactured by the Mercedes-Benz division of Daimler AG as a replacement for the Mercedes straight-5 and straight-6 cylinder engines.

By 2010 a BlueTEC version of the Mercedes Sprinter OM642 was released. The BlueTEC systems allowed the elimination of much of the EGR in that vehicle's engine, which as a result gave 188 HP compared to the non-BlueTec engine's 154 hp.

The engine features common rail Direct injection and a variable nozzle turbocharger. The injection system operates at 1600 bar, while the compression ratio is 18.0:1. The engine features a counter-rotating balance shaft mounted between the cylinder banks to cancel the vibrations inherent to the 72 degree V6 design, and the crankpins are offset by 48 degrees to achieve even 120 degree firing intervals. In some heavy vehicle applications, Mercedes' BlueTec AdBlue urea injection is utilised for NOx reduction. In lighter vehicle applications, a NOx storage catalyst captures nitrous oxides, which are periodically purged (decomposed) by running the engine slightly rich. A particulate filter lowers soot, making this engine ULEV certified. Engine mass is 208 kg. Power output is 165 kW and 510 Nm of torque. For the 2007 model year, torque is raised to 540 Nm.

At the beginning of summer 2017 the engine, together with Mercedes-Benz OM651 was under investigation by the Federal Motor Transport Authority in respect of the alleged emissions cheating scandal wherein the laboratory emissions testing produced a different amount of diesel exhaust fluid usage and lower emissions than in real world operating scenarios.

Implementation

Vehicles using this engine include:

Dodge / Freightliner Trucks / Mercedes-Benz Sprinter (2006–2022)
Jeep Grand Cherokee WK/WH (2005–2010 (Europe)1, 2007–2008 (North America)2)
Jeep Commander XK/XH (2006–2010 (Europe))
Mercedes-Benz C320 CDI (2005–2007)
Mercedes-Benz E280/E300/E320 CDI/BlueTEC (2007–2009)
Mercedes-Benz C320/C350 CDI (2009–2014)
Mercedes-Benz CLK320 CDI (2005–2010)
Mercedes-Benz E350 CDI/BlueTEC (2010–2016)
Mercedes-Benz E 350d (2016–2018)
Mercedes-Benz GLK 350 CDI (2013–2015)
Mercedes-Benz R280/R300/R320/R350 CDI/BlueTEC (2007–2012)
Mercedes-Benz ML280/ML300/ML320/ML350 CDI/BlueTEC (2007–2011)
Mercedes-Benz ML350 BlueTEC/GLE 350d (2011–2018)
Mercedes-Benz G280 CDI Worker/G280 CDI Edition 30 PUR/G280/G300 CDI Professional (2007–2013)
Mercedes-Benz G320 CDI/G350 CDI/BlueTEC (2007–2018)
Mercedes-Benz GL320/350 CDI/BlueTEC (2006–2012)
Mercedes-Benz GL350 BlueTEC/GLS 350d (2012–2018)
Mercedes-Benz GLC 350d (2016–2019)
Mercedes-Benz S320/350 CDI/BlueTEC (2005–2013)
Mercedes-Benz S350 BlueTEC/S 350d (2013–2017)
Mercedes-Benz CLS320/350 CDI (2005–2011)
Mercedes-Benz Vito 120/122 CDI/Viano 3.0 CDI (2006–2014)
Chrysler 300C (2006–2011) (Europe, Australia and New Zealand only)
Mercedes-Benz X350d (2017–2020)

1 EMEA market 2 NAFTA market

Intake System

Air is drawn into the engine through two air filters located above each cylinder head. The amount of the air is measured by two hot film mass air flow sensors B2/6&7. On Sprinter models, a single air filter housing is mounted upon brackets on top of the engine.

The variable geometry turbine is actuated via a linkage connecting the controller to vanes inside the turbine housing. With the VGT vanes in a closed position, the exhaust gases are accelerated into the turbine wheel blades increasing shaft speed thereby increasing boost. With the vanes in the open position the exhaust gases are decelerated causing a drop in the shaft speed and consequent drop in boost.

References

"05_kompact_en.doc". ourexcellentadventures.com.
(Apr 20, 2010). "Mercedes to bring Bluetec diesel to European-market Sprinters by 2012, but we get it first!".
[http://blogs.consumerreports.org/cars/2008/04/mercedes-bluete.html Consumer Reports: What is BlueTec?] {{webarchive. link. (2009-06-06)
"Motive Magazine ULEV certification, Diesel Car Bomb BlueTec".
[https://www.heise.de/newsticker/meldung/Abgas-Skandal-KBA-findet-angeblich-deutliche-Hinweise-auf-illegale-Abschalteinrichtungen-in-Mercedes-3772058.html Abgas-Skandal: KBA findet angeblich deutliche Hinweise auf illegale Abschalteinrichtungen in Mercedes-Dieselautos], heise, 2017-07-14

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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