5 Series E60 M5 (S85) SAL
One electric throttle valve positioner activates 5 individual throttle butterflies which are mechanically coupled.
The throttle valve position for each cylinder bank is adjusted via the throttle valve sensor.
A local CAN bus (Local CAN) is used for communication between the DME and the throttle valve positioner.
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2 idle actuators
One electric idle actuator on each cylinder bank controls the air supply at idling speed and when engine loads
are low. Both idle actuators are accommodated in the V formed by the two cylinder banks. The idle actuator
contains a throttle valve. The DME controls the idle actuator via a local CAN bus (Local CAN). The SMG control
unit is also connected to this Local-CAN.
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Secondary air pump and secondary air valve
The secondary air pump mixes fresh air with the exhaust gas following engine start-up.
The fresh air causes the combustible hydrocarbons in the exhaust gas to oxidise.
This reduces the proportion of hydrocarbons in the exhaust gas and also enables the operating temperature of
the main catalytic converters near the engine to be reached more quickly.
In order to monitor the system, a small mass air flow sensor measures the secondary air supply.
The secondary air valve is a mechanical valve. The secondary air pump generates pressure which in turn opens
the secondary air valve.
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2 VANOS adjustment units and VANOS accumulator
A VANOS adjustment unit on each cylinder bank facilitates camshaft adjustment (double VANOS). A separate
oil pump supplies oil with a maximum pressure of 90 bar to the VANOS adjustment unit.
In the S85B50, the VANOS solenoid valves on the VANOS adjustment unit operate proportionally. The
crankshaft drives the high-pressure pump for the VANOS adjustment unit via gear teeth.
The nitrogen in the VANOS accumulator is precompressed at 40 bar. The oil chamber is separated from the gas
chamber by a piston. When the engine is switched off, the pressure accumulator valve on the VANOS
accumulator is closed.
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2 fuel pumps and fuel-pressure sensor
There are 2 fuel pumps (vane-cell pumps) in the fuel tank. Both fuel pumps are integrated into the right half of
the tank. The fuel pumps are activated by the DME via a separate fuel pump output stage according to demand.
The fuel-pressure sensor is located in the front left wheel well. In order to supply fuel according to demand, the
fuel delivery pressure must be measured. The measured fuel delivery pressure is sent to the DME.
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4 oil pumps
A total of 4 oil pumps are responsible for the oil supply.
The oil pump housing contains 2 oil pumps. The duocentric pump pumps the oil from the front oil sump to the
rear oil sump.
A controllable pendulum slide cell pump draws the oil from the rear sump and pumps it into the oil filter.
2 electric oil pumps draw oil from the cylinder head on the outside during extreme cornering manoeuvres and
pump it into the rear oil sump.
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Oil pressure switch
The oil pressure switch signals to the DME that the critical oil pressure threshold has been reached. If the
pressure falls below the threshold, the DME generates a Check-Control message.
SBT S85B50 engine E60, E61 M5 E63, E64 M6
BMW AG - TIS
23.02.2013 19:29
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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