BMW 7 Series: System Overview
Front Axle
A double wishbone front axle as known from the E70 and E71 is now also fitted in the F01/F02.
In comparison with the double pivot spring strut front axle on the E65, this front axle design offers the following advantages:
- Higher transverse acceleration is reflected in greater vehicle agility.
- Improved cornering/steering and transition characteristics which are particularly favorable in terms of rolling motion.
- Reduced interference means greater comfort.
- Shock absorbers that are subjected to virtually no transverse forces provide greater comfort.
- The design layout of the double wishbone front axle facilitates vertical dynamics control (VDC) and all-wheel drive (as on the E70/E71) without the need to adjust height and no spring travel loss.
- Double wishbone front axles improve directional stability.
The outstanding driving dynamics, the excellent driving comfort as well as the exceptional directional stability are factors of this double wishbone front axle design solution that contribute to a high degree of driving pleasure and safety while making the vehicle ideal for every day use and providing the most relaxing drive on long journeys.
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Fig. 1: Identifying F01/F02 Chassis And Suspension Components
COMPONENT REFERENCE CHART
- Spring/damper
- Rear axle
- Wheels/tires
- Steering
- Brakes
- Front axle
Rear Axle
Compared to the integral IV rear axle, the further-developed integral-V rear axle in the F01/F02 is characterized by further improved driving dynamics without compromising comfort and driving safety.
Furthermore, a "distributed" integral-V rear axle was required in order to realize HSR (rear axle slip angle control) that is a fundamental part of the integral active steering system.
Dampers/suspension
In the F01/F02, the range of spring/damper units extends from the steel spring with standard vertical dynamics control (VDC) through to the electronically controlled dampers that can also be combined with the single axle air spring on the rear axle.
Brakes
The brake system on the F01/F02 is a further developed high performance brake system with newly adapted dimensions for the F01/F02 and is dependent on the national market specification. The service brake is based on the conventional design, however, the parking brake features an electromechanical parking brake system (EMF).
Steering
The F01/F02 is available with two steering system variants:
- Hydraulic servotronic
- Integral active steering (IAL).
Both steering systems are adapted to the varied application options of the F01/F02. The integral active steering is a new BMW development.
Wheels and Tires
In contrast to its predecessor the E65/E66, the F01/F02 is now equipped as standard with a runflat safety package.
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System Components
General
The chassis and suspension is subdivided into the main components that are
described in more detail in the
following:
Front axle
Rear axle
Damping/suspension
Brakes
Steering
Wheels/tir
Service
NOTE: The track and camber at the rear axle can still be adjusted by means
of two
eccentric screws, however, a new procedure must be observed!
REAR AXLE DIMENSION REFERENCE CHART
Damping/suspension
SEE MORE:
Auto Start/Stop function
Concept
The Auto Start/Stop function helps save fuel.
The system switches off the engine during a
stop, for instance in traffic congestion or at traffic
lights. Drive-ready state remains switched on.
The engine starts automatically for driving off.
General information
After each engine start using
Start/Stop button
Vehicle features and
options
This chapter describes all standard, country-specific
and optional features offered with the series.
It also describes features and functions that are
not necessarily available in your vehicle, e.g., due
to the selected options or country versions. This
also applies to
