3 Series E36 M3 (S52) COUPE
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extent of maintenance work
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fuel consumption
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engine performance
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noise levels
The diesel particulate filter is currently designed for a service life of 200,000 kilometers (monitored by Condition
Based Service). The use of an additive for regeneration of the diesel particulate filter is not necessary (additive
reduces ignition temperature of the soot).
Brief description of components
For compliance with the EURO 4 exhaust emission regulations, the M47TU/M57TU have the following new or
modified components:
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Oxygen sensor
For compliance with the exhaust emission limits, an oxygen sensor is necessary.
The oxygen sensor is required for the adaptation of the mean injection quantity.
The oxygen sensor measures the fuel-air ratio. In case of deviations, the DDE adjusts the exhaust gas
recirculation rate to the new fuel-to-air ratio.
[more ...]
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Injectors
The injector characteristic map for injection quantity has been adapted.
Design changes have given the injectors a continuous characteristic curve. This means that changes in the
injection time have a direct effect on changes in injection quantity.
[more ...]
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Charge-air pressure actuator (electrical actuator drive on turbocharger)
The exhaust-gas turbocharger has a variable turbine geometry (VNT = "variable nozzle turbine"). To ensure
compliance with the EURO 4 exhaust emission regulations, an electrical charge-air pressure actuator now
adjusts the variable turbine geometry (on previous versions, an electropneumatic pressure converter adjusted
the variable turbine geometry).
Because of the increased adjustment speed and by acting on changes more quickly, a more precise boost
pressure control is achieved.
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Cylinder head and pistons
The swirl port and tangential port of the cylinder head have been geometrically redesigned.
The piston crown bowl has been modified for improved mixture formation. This has also resulted in a change to
the shape of the coolant port in the piston.
[more ...]
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Exhaust gas recirculation cooler
The exhaust recirculation cooler is now longer. Consequently, the exhaust recirculation cooler has a greater
cooling capacity. The new exhaust gas recirculation cooler enables the exhaust-gas temperature to be reduced
by approx. 100 C (in EURO 4 driving cycle).
[more ...]
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Diesel particulate filter (M57TU in E60/E61 only)
The diesel particulate filter has a catalytic coating and absorbs the soot particulates in the exhaust. The stored
soot particulates are continuously burned off at exhaust temperatures above approx. 350
°
C.
The stored soot particulates are cyclically burned off at exhaust temperatures above approx. 600
°
C.
SBT EURO 4 exhaust emission regulations and E-OBD for M47TU diesel engines M47TU, M5
BMW AG - TIS
10.02.2013 18:52
Issue status (12/2007) Valid only until next DVD is issued
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