DI Diesel Engines M57/M67 - Common Rail Sec. 1 P.6
Course contents/Background material
Technical features
Common features
• Light-alloy cylinder head
• 4-valve technology with centrally arranged injection nozzle
• Valves and springs identical to M47
• Exhaust turbocharger with variable nozzle turbine (VNT)
• Compression ratio 18:1, compression 20 - 25 bar (operating
temperature)
• Common rail injection system
• Air mixture 1.15 ≤ λ ≤ 4
• Cooling duct pistons with central crown bowl
• Electronically controlled exhaust gas recirculation
• Exhaust re-treatment by means of diesel-specific
oxidation catalytic converter and engine-close primary
catalytic converter
• Switchable hydraulic engine mounts
• 7-blade fan wheel with viscous clutch drive
• Average inspection intervals 20 000 up to max. 25 000 km
limited to 2 years
•
The engine begins to cut out at 4000 rpm. The injected volume
is reduced continuously. The cutout limit is reached
at approx. 4800 rpm
M57-specific features
• In-line 6-cylinder engine with cast-iron crankcase
• High-pressure fuel pump (CP1)
• Plastic cylinder head cover
• Plastic manifold based on two-shell weld technology
M67-specific features
• Cast iron 90º V8 cylinder engine with cracked bearing caps
• High pressure fuel pump (CP3)
• Aluminium cylinder head cover
• Thin-walled cast air intake plenum
• Two-piece oil pan
• Bi-VNT with electrical guide vane adjustment
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