MTU 12V4000G34F Operating Instructions Manual page 56

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 gas system
• Increased thermal and mechanical load capacity of pipework before the intercooler
Operation
Exhaust system
When the exhaust valves open, the exhaust gases flow out of the combustion chamber of the cylinders
through the exhaust channels of the cylinder heads into the exhaust manifolds (2) and to the exhaust turbo-
chargers (3).
Exhaust gas flowing into the turbine housing drives the turbine wheel of the rotor assembly before being
routed out to atmosphere via the exhaust outlet (5) and the exhaust gas system.
Charge-air system
From the compressor wheel which is arranged on the same shaft of the rotor assembly air is drawn in from
the outside via air filters (4) and is compressed in the compressor housing. The compressed air flows
through charge-air pipes to the intercooler (7). From there, air is led via air supply pipes (10) to the inlet
ducts (11) of the cylinder heads into the combustion chambers of the cylinder.
A defined volume of charge air after the intercooler (7) is drawn off through the performance map-controlled
blow-off valve (8) and is fed in after the exhaust turbocharger on the left engine side. This reduces the load
on the running gear in cold boundary conditions
To achieve high cylinder power output, the charge-air is cooled in intercooler (7).
56 | Functional Description | MS15060/01E 2018-12