6 Series 650i (N62TU) Coupe
for tank leak").
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A/C compressor
The DME control unit is connected to the integrated automatic heating/air conditioning system (IHKA) through
the bus system. The IHKA switches the A/C compressor on or off.
The DME control unit supplies the signal to the IHKA through the bus.
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Active Steering, Active Cruise Control, electronic transmission control
The DME control unit is connected by the bus system to the following control units (depending on the equipment
fitted in the vehicle):
•
AL: Active Steering
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ACC: Active Cruise Control
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EGS: Electronic transmission control
•
LDM: Longitudinal dynamics management
These interfaces are needed for the torque monitoring function.
The digital engine electronics (DME) activates the following actuators:
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2 Valvetronic actuator motors via the Valvetronic control unit
The air flow to the engine during throttle-free operation is adjusted by the variable valve lift and not the throttle
valve.
Valvetronic is driven by an electric motor. The Valvetronic actuator is mounted on the cylinder head. The
Valvetronic actuator uses a worm gear to drive the eccentric shaft in the cylinder head oil chamber.
The eccentric shaft sensor indicates the position of the eccentric shaft to the DME control unit via the Valvetronic
control unit.
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2 DISA servomotors for variable intake manifold
The N62TU has a 2-stage differentiated air intake system (DISA).
The DISA servomotor drives 4 sliding sleeves for each cylinder bank.
The sliding sleeves lengthen or shorten the intake port.
This means that a more ample torque curve is reached at low engine speeds without a loss of engine output at
higher engine speeds.
[more ...]
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Electric throttle-valve actuator
The DME control unit calculates the position of the throttle valve: from the position of the accelerator pedal and
the torque required by other control units. In the electric throttle-valve actuator, the position of the throttle valve is
monitored by 2 potentiometers.
The electric throttle-valve actuator is electrically opened or closed by the DME control unit.
With Valvetronic, the throttle-valve actuator is activated for the following functions:
•
Engine start (warm-up)
•
Idle speed control
•
Full load operation
•
Emergency operation
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4 VANOS solenoid valves
The purpose of the variable camshaft control is to increase torque in the low and medium engine speed ranges.
A VANOS solenoid valve controls a VANOS adjustment unit on the intake end and the exhaust end.
The VANOS solenoid valves are controlled by the DME control unit.
SBT 8-cylinder spark-ignition engine N62TU E60, E61, E63, E64, E65, E66, E70
BMW AG - TIS
19.01.2013 07:33
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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