Mercedes-Benz OM642 engine
Encyclopedia
The Mercedes-Benz OM642 engine is a 3.0-liter, 72° 24-valve, aluminum block diesel V6 engine
manufactured by the Mercedes-Benz
division of Daimler AG as a replacement for the Mercedes-Benz inline
-5 and -6 engines.
The engine features common rail
fuel injection and a variable nozzle turbocharger
. The injection
system operates at 1600 bar (23,206 psi), while intake air is compressed at a ratio of 18:1. 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
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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 (458.6 lb). Power output is 165 kW and 510 newton metre of torque. For the 2012 model year, output on US mercedes diesel vehicles will be raised to 240 horsepower and 455 lb-ft of torque.
The engine is manufactured at the Daimler AG plant in Marienfelde
, Berlin
, Germany
.
Oil specification MB 229.51 or MB 228.31 is recommended/
Vehicles using this engine include:
1 EMEA
2 North America
V6 engine
A V6 engine is a V engine with six cylinders mounted on the crankcase in two banks of three cylinders, usually set at either a right angle or an acute angle to each other, with all six pistons driving a common crankshaft...
manufactured by the Mercedes-Benz
Mercedes-Benz
Mercedes-Benz is a German manufacturer of automobiles, buses, coaches, and trucks. Mercedes-Benz is a division of its parent company, Daimler AG...
division of Daimler AG as a replacement for the Mercedes-Benz inline
Straight engine
Usually found in four- and six-cylinder configurations, the straight engine, or inline engine is an internal-combustion engine with all cylinders aligned in one row, with no offset...
-5 and -6 engines.
The engine features common rail
Common rail
Common rail direct fuel injection is a modern variant of direct fuel injection system for petrol and diesel engines.On diesel engines, it features a high-pressure fuel rail feeding individual solenoid valves, as opposed to low-pressure fuel pump feeding unit injectors...
fuel injection and a variable nozzle turbocharger
Turbocharger
A turbocharger, or turbo , from the Greek "τύρβη" is a centrifugal compressor powered by a turbine that is driven by an engine's exhaust gases. Its benefit lies with the compressor increasing the mass of air entering the engine , thereby resulting in greater performance...
. The injection
Fuel injection
Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....
system operates at 1600 bar (23,206 psi), while intake air is compressed at a ratio of 18:1. 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
BlueTec
BlueTec is Daimler AG's marketing name for engines equipped with advanced NOx reducing technology for vehicle emissions control in diesel-powered vehicles...
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Diesel Exhaust Fluid is an aqueous urea solution used in Selective Catalytic Reduction to lower NOx concentration in the exhaust emissions from diesel engines...
urea
Urea
Urea or carbamide is an organic compound with the chemical formula CO2. The molecule has two —NH2 groups joined by a carbonyl functional group....
injection is utilised for NOx
Nitrogen oxide
Nitrogen oxide can refer to a binary compound of oxygen and nitrogen, or a mixture of such compounds:* Nitric oxide, also known as nitrogen monoxide, , nitrogen oxide* Nitrogen dioxide , nitrogen oxide...
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
Ultra Low Emission Vehicle
An ultra-low-emission vehicle is a motor vehicle that emits extremely low levels of motor vehicle emissions compared to other vehicles...
certified. Engine mass is 208 kg (458.6 lb). Power output is 165 kW and 510 newton metre of torque. For the 2012 model year, output on US mercedes diesel vehicles will be raised to 240 horsepower and 455 lb-ft of torque.
The engine is manufactured at the Daimler AG plant in Marienfelde
Marienfelde
Marienfelde is a locality in southwest Berlin. It is a mixed industrial and residential area, and part of the borough of Tempelhof-Schöneberg.-Transportation and industry:...
, Berlin
Berlin
Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...
, Germany
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...
.
Oil specification MB 229.51 or MB 228.31 is recommended/
Vehicles using this engine include:
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1 EMEA
EMEA
EMEA may stand for:* the previous acronym of the European Medicines Agency, an EU regulatory agency for the evaluation of medicinal products* Europe, the Middle East and Africa...
2 North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...