7 Series E66 750Li (N62TU) SAL
accurately charged. The exhaust temperature sensor upstream of the catalytic converter monitors the exhaust
temperature upstream of the oxidation catalytic converter. The diesel particulate filter cannot be regenerated
until the exhaust reaches a temperature of approx. 300
°
C.
> M57TU2
The diesel particulate filter is separated from the oxidation catalytic converter on the underbody of the vehicle.
>M67TU
The diesel particulate filter close to the engine forms one component together with the oxidation catalytic
converter.
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Swirl valves
>M67TU
Up until now, the ports in the cylinder head were separated into the swirl and tangential intake ports.
The tangential ports cannot accommodate the swirl flaps because the installation space is too tight.
In the M67TU engine, the ports are therefore separated at an earlier point, in the intake manifold.
This allows the swirl flaps to be accommodated in the tangential ports in the intake manifold. A central electrical
swirl flap actuator adjusts all the swirl flaps simultaneously using a mechanism
>
An electric change-over valve controls the gas-tight swirl flaps pneumatically.
[more ...]
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Exhaust gas recirculator
>M67TU
The ports in the exhaust gas recirculation system are integrated in the cylinder head.
Both the electrical exhaust gas recirculators are therefore built directly onto the cylinder heads (at the rear on the
front faces). The exhaust gas recirculators are cooled with coolant from the cooling circuit.
The coolant channels in the exhaust gas recirculation coolant are also integrated in the cylinder head.
[more ...]
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Exhaust flap
> M57TU2
An exhaust flap with low pressure activation is installed on the rear exhaust silencer.
The exhaust flap reduces the noise build-up when the engine is idle and when the speed range is close to idle.
The DDE controls the exhaust flap pneumatically via an electric change-over valve.
[more ...]
System functions
The following system functions are described:
-
Third generation common rail system
-
Zero quantity adaptation and mean quantity adaptation
-
Electronic oil checking
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Regeneration of the diesel particulate filter
Third generation common rail system
The third generation common rail system has piezo injectors. The fuel pressure is approximately 1600 bar.
Still only about half of the fuel from the piezo injector flows back into the return fuel line.
SBT M57TU2 and M67TU diesel engines E65, E66
BMW AG - TIS
13.02.2013 09:10
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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