BMW 7 Series: System Overview
Integrated Active Steering
General Details
Integrated Active Steering is an innovative and logical development of the Active Steering system developed by BMW.
With Active Steering, a steering angle amplification factor reduces the steering effort on the part of the driver and combines the capabilities of "steer by wire" systems with authentic steering feedback.
By intervening in the steering independently of the driver's actions, it is also able to perform a stabilizing function in terms of vehicle handling.
In order to move further ahead in terms of handling dynamics, the familiar Active Steering has now been logically extended by the addition of active rear-wheel steering on the new BMW 7 Series.
Active Steering of the rear wheels is a logical extension of Active Steering and the two are now combined as an all-in one system referred to as Integrated Active Steering.
Integrated Active Steering is available as an option on the F01/F02 because the standard steering system is the Servotronic.
Components of Servotronic Steering (standard)
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Fig. 80: Identifying Servotronic Steering Components (Standard)
SERVOTRONIC STEERING (STANDARD) COMPONENT REFERENCE CHART
- DME
- Front power distribution box
- SZL
- ICM
- ZGM
- DSC
- Servotronic valve
- Electronic volumetric flow control (EVV) valve
Components of Integrated Active Steering
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Fig. 81: Identifying Integrated Active Steering Components
INTEGRATED ACTIVE STEERING COMPONENT REFERENCE CHART
- DME
- Front power distribution box
- CAS
- Brake light switch
- Instrument cluster
- Integrated Chassis Management (ICM)
- Rear power distribution box
- HSR control unit
- Rear-wheel steering actuator (HSR)
- SZL
- ZGM
- Active Steering actuator control unit
- DSC
- Active Steering actuator motor with motor angular position sensor and lock
- Electronic volumetric flow control (EVV) valve
- Servotronic valve
Bus Diagram for Lateral Dynamics Systems
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Fig. 82: Bus Diagram For Lateral Dynamics Systems
INDEX REFERENCE CHART
CAS - Car Access System
ZGM - Central Gateway Module
DME - Digital Motor Electronics
DSC - Dynamic stability control
SZL - Steering column switch cluster
HSR - Rear-wheel steering control unit
AL - Active Steering
ICM - Integrated Chassis Management
System Circuit Diagram for Servotronic System
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Fig. 83: Servotronic System Circuit Diagram
INDEX REFERENCE CHART
- Dynamic stability control
- Electronic volumetric flow control (EVV) valve
- Servotronic valve
- Digital Motor Electronics
- Central Gateway Module
- Steering column switch cluster
- Front power distribution box
- Integrated Chassis Management
System Circuit Diagram for Integrated Active Steering
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Fig. 84: Integrated Active Steering System Circuit Diagram
INDEX REFERENCE CHART
- Active Steering lock
- Active Steering electric motor
- Active Steering motor angular position sensor
- Electronic volumetric flow control (EVV) valve
- Servotronic valve
- Dynamic stability control
- Digital Motor Electronics
- Central Gateway Module
- Active Steering
- Car Access System
- Front power distribution box
- Instrument cluster
- Steering column switch cluster
- Brake light switch
- Integrated Chassis Management
- Right rear power distribution box
- Battery power distribution box
- Rear suspension slip angle control
- HSR electric motor
- Hall-effect sensor
- Track-rod position sensor
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Functions
Steering Systems
Implementation of the Integrated Active Steering function has essentially
been made possible by the new ICM
system complex on the F01/F02.
The Servotronic function including valve c
Higher-level Dynamic Handling Control
Centralized Dynamic Handling Control
The interventions by the dynamic handling control systems are performed with
the aim of improving agility and
traction. Quite obviously, they also re-stabilize th
Functional Areas of Integrated Active Steering
Low Speed Range
The variable steering-gear ratio of the Active Steering component reduces
steering effort to approximately 2
turns of the steering wheel from lock to lock. In the low speed range up t
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Child restraint systems
with tether strap
Safety information
Warning
If the upper retaining strap is incorrectly used
for the child restraint system, the protective effect
can be reduced. There is a risk of injury.
Make sure that the upper retaining strap does not run over sharp edges and is
not twisted as
it passes the upper anchor.
Wa
DTC Dynamic Traction
Control
Concept
DTC is a version of the DSC Dynamic Stability
Control where forward momentum is optimized.
The system ensures maximum headway on special
road conditions or loose road surfaces, for instance
unplowed snowy roads, but with somewhat
limited driving stability.
General information
When DTC is ac
