BMW S58, Руководство пользователя

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S58�Engine
12.�Engine�Electrical�System
93
S58�engine,�DME�8.6.S�connections
Index Explanation
1 DME�8.6.S
2 Module�600,�injection�and�ignition
3 Module�500,�DME�supply
4 Module�400,�Valvetronic�servomotor
5 Module�300,�sensors�and�actuators�2
6 Module�200,�sensors�and�actuators�1
7 Module�100,�vehicle�connection
12.1.2.�Overall�function
The�Digital�Engine�Electronics�(DME)�is�the�computing�and�switching�center�of�the�engine�control
system.�Sensors�on�the�engine�and�on�the�vehicle�deliver�the�input�signals.�The�signals�for�activating
the�actuators�are�calculated�from�the�input�signals,�the�setpoint�values�calculated�using�a�computing
model�in�the�DME�control�unit�and�the�stored�characteristic�maps.�The�DME�control�unit�activates�the
actuators�directly�or�via�relays.
The�PT-CAN�wakes�up�the�DME�control�unit.
The�after-run�begins�once�the�terminal�is�switched�to�OFF.�The�adaptation�values�are�stored�during�the
after-run.�The�DME�control�unit�uses�a�bus�signal�to�signal�its�readiness�to�"go�to�sleep".�When�all�the
participating�control�units�have�signalled�their�readiness�to�"go�to�sleep",�the�bus�master�outputs�a�bus
signal�and�the�control�units�terminate�communication�5�seconds�later.