X Series E70 X5 3.0Si (N52K) OFFRD
The seat position detector indicates the longitudinal position of the driver's seat. This allows the system to
recognise the distance between the person sitting on the driver's seat and the steering wheel.
The seat position signal influences the response of the adaptive belt force limiter and the delayed triggering of
the 2nd stage of the gas generator (driver's airbag). The adjustment distance of the driver's seat is registered by
Hall sensors in the drive and processed in the seat module.
The seat module emits a message on the K-CAN. The Crash Safety Module is joined to the K-CAN and the F-
CAN buses.
Special sensors for recognising rollovers are integrated in the crash safety module: Yaw rate sensor, longitudinal
acceleration sensor, lateral acceleration sensor. Occupant safety is yet further increased by the rollover
protection system.
The belt tighteners and head airbags are triggered by a certain severity of impact.
The direct networking with the Dynamic Stability Control (DSC) via the F-CAN means that any rollover can be
predicted more precisely and rapidly.
From 10/2007 the E70 will be equipped with a crash-active head restraint (E71 from market launch).
The crash-active head restraint reduces loading of the cervical spine in a rear collision.
Depending on the seat position and the seat deign, the distance between the head and the head restraint may
be more than 100 mm.
In a rear collision the front part of the head restraint is moved almost instantaneously forwards by up to 60 mm
by a spring drive.
Even before the head is thrown back by the rear impact, the crash active head restraint has already reduced the
distance between it and the passenger's head.
The crash-active head restraint is pyrotechnically triggered by the Crash Safety Module (ACSM).
[more ...]
-
Wiper/washer system
The vehicle is equipped with 2 front windscreen wipers and one rear window wiper. The headlight cleaning
system is an optional extra. The wiper switch forms part of the steering column switch cluster (SZL).
The signals from the wiper switch are relayed by the steering column switch cluster via the F-CAN to the
Dynamic Stability Control.
From the Dynamic Stability Control, the sign is transmitted via the PT-CAN to the junction box electronics (JBE).
The JBE evaluates the signals and actuates the wiper motors.
The JBE recognises the resting position of the wiper via the reset contact in the wiper motor.
[more ...]
-
Seats
An extensive range of seat fittings is available for the vehicle. Basically, 3 different seat models are offered:
Basic seat, sport seat, multifunction seat (comfort seat).
The front side airbag is integrated in the backrest of the driver and front passenger seats.
In the active seat, the seating cushion is electropneumatically activated instead of electrohydraulically as
previously. The electropneumatic control means that the total weight of the seat can be reduced.
The backrests in the 2nd row are divided in two (60/40).
The locking of the 2nd seat row is monitored by several microswitches. These microswitches ensure that the
seat once locked is not inadvertently or unexpectedly released.
This increases the protection of occupants against injuries.
For the first time, the E70 has a third seat row (7 seater, SA 4UB).These seats are not heated. However, a
SBT Electrical systems E70, E71
BMW AG - TIS
07.02.2013 11:39
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 21 -
