Overview
11
Introduction of New Generation of 4-Cylinder Inline Engines, OM 651
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At a glance
Objective Measures on engine 651
Optimized comfort Stiffer crankcase with full-length crankshaft bearing bridge
Wide crankshaft main bearing; friction-optimized with center bearing
Two low-positioned Lanchester balance shafts for smooth engine running
Plastic cylinder head cover with integrated ventilation
Maintenance-free, long-life simplex chain as camshaft drive
Engine cover with adjusted acoustic damping
Improved fuel
economy
Optimized flow conditions (air ducting, intake ports)
Dual stage turbocharging
Optimized charge air cooling and exhaust gas recirculation cooling
Reduction in friction through gear drive and balance shafts mounted
on roller bearings
Compliance with
exhaust emissions
standards (Euro 5
standard)
Optimized shape of combustion chamber
7-hole injection nozzles
More precise injection times
Optimized air ducting
Exhaust gas recirculation (EGR) with EGR pre-cooler and EGR cooler, EGR valve and
switched EGR bypass
Electric intake air throttling
Shutoff-capable coolant pump and shutoff-capable oil spray nozzles
Exhaust system with oxidation catalytic converter and diesel particulate filter
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