Information on the Inline Engine Generation 4-Cylinder OM654

Engine OM654 is a newly developed 4-cylinder diesel engine
with common rail diesel injection system, multiway exhaust
gas recirculation, single-stage turbocharging, exhaust after-
treatment with the third generation SCR system and optimi-
zed thermal management. Engine OM654 will be introduced
in the new E-Class.
The following goals are achieved with the new OM654:
• U niform concept of a single engine family
• Suitable for different drive concepts
• Increased output
• W eight reduction
• R educed consumption
• Compliance with future emissions limits
• P otential for development with regard to reductions in
consumption and emissions
• Improved noise behavior
The special features of engine OM654 in brief:
• Common rail diesel injection system with 2050 bar
• 8-hole piezo injectors
• Aluminum crankcase with Nanoslide cylinder wall coating
• T andem oil pump integrated in the crankcase
• T iming chain on the flywheel side for driving the
high-pressure pump, the oil pump and both camshafts
• Gearwheel drive for the balance shafts
• Oil spray nozzle shutoff valve for controlling the oil spray
nozzles for piston crown cooling
• Aluminum cylinder head, four valves per cylinder, two
overhead camshafts
• Multiway exhaust gas recirculation with cooled high-pres-
sure and low-pressure exhaust gas recirculation
• Cylinder head with 2-piece water jacket
• N ear-engine mounted combination of diesel oxidation ca-
talytic converter, diesel particulate filter and SCR catalytic
converter
• Exhaust aftertreatment with SCR
• Load-controlled preinjections and post injections
• T wo balance shafts (Lanchester)
• Compliance with the Euro 6 emissions standard
• ECO start/stop function
• Quick-glow system with glow output stage
• 1-stage turbocharging, variable turbine geometry with wa-
ter-cooled bearing housing and E-actuator