At a glance Overview 11 Introduction of New Generation of 4-Cylinder Inline Engines, OM 651 q – This printout will not be recorded by the update service. Status:
09 / 2008 – 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