Mercedes-Benz OM642 engine | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-07-07

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Mercedes-Benz_OM642_engine


00:02:16 1 Implementation
00:05:26 2 Production
00:10:06 3 Intake System
00:10:53 4 See also



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SUMMARY
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The Mercedes-Benz OM642 engine is a 3.0 litres (2,987 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.The engine features common rail Direct injection and a variable nozzle turbocharger. The injection system operates at 1,600 bar (23,000 psi), 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 (459 lb). Power output is 165 kW (224 PS; 221 hp) and 510 N⋅m (376 lb⋅ft) of torque. For the 2007 model year, torque is raised to 540 N⋅m (398 lb⋅ft).
Beginning of summer 2017 the engine, together with Mercedes-Benz OM651 is in discussion that depending if the engine is operated in laboratory emissions testing a different amount of diesel exhaust fluid is used than in real world operating scenarios.