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Benefits
• Low exhaust emissions
• Low fuel consumption
• High degree of engine efficiency
• Optimum load application characteristics
• Optimized inflow to compressor
• Straightforward connection to external exhaust system
• Increased thermal and mechanical load capacity of pipework before the intercooler
Function
Exhaust system
After the exhaust valves open, exhaust gases flow out of the cylinder combustion chambers through the ex-
haust ducts (15) in the cylinder heads to the exhaust manifolds (14) leading to the exhaust turbochargers (1,
3, 7, 8).
Exhaust gas flowing into the turbine housing (4) drives the turbine wheel of the rotor assembly before being
routed out to the atmosphere via the exhaust outlet (2) and the exhaust system.
Charge-air system
The compressor wheel which is arranged on the same shaft of the rotor assembly draws air from the out-
side (11) via the air filter and compresses it in the compressor housing (5). The compressed air flows through
charge-air pipes (6, 10) to the intercooler (9). From there, air is led via air supply pipes (12) to the inlet
ducts (13) of the cylinder heads into the combustion chambers of the cylinder.
To achieve high cylinder power output, the charge-air is cooled in the intercooler (9). The split-circuit cooling
system permits preheating of the charge air in the intercooler in low-load operation. This leads to low HC
emissions during low-load operation.
56 | Series 4000 Engines | MS15065/01E 2019-01
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