BMW
Media
Information
5/2009
Page 43
flow from the pump is reduced electrically, cutting back the power uptake
accordingly. The significant reduction of energy consumption ensured in this
way makes an additional contribution to the car’s high standard of efficiency.
As an option the BMW 5 Series Gran Turismo may be equipped with BMW’s
highly innovative Integral Active Steering. As a function of road speed,
this cutting-edge steering technology influences steering forces through the
Servotronic function as well as the steering angle via the additional transmission
unit acting through Active Steering on the front axle.
Integral Active Steering also controls the steering angle on the rear wheels
through a concentrically arranged motor with spindle drive acting on
the rear axle.
Integral Active Steering varies the steering angle both front and rear through
an electric motor masterminded by a control unit taking data on wheel speed,
movements of the steering wheel, the yaw rate and lateral acceleration delivered
by sensors into account, and thus ensuring optimum steering behaviour under
all conditions.
The maximum steering angle on the rear wheels is 2.50. At low speeds the
rear wheels turn against the steering angle on the front wheels to give the
BMW 5 Series Gran Turismo a significantly higher standard of agility in every
respect. The turning circle is significantly reduced and the reduction of steering
forces provides a noticeable increase in motoring comfort.
At higher speeds, on the other hand, Integral Active Steering gives the vehicle
truly outstanding motoring comfort and a superior response when changing
lanes and in bends, with the rear wheels turning in the same direction as the
front wheels.
In abrupt steering manoeuvres the BMW 5 Series Gran Turismo again follows
the driver’s steering commands with utmost precision and supremacy.
Active Steering intervening at the same time on both axles also optimises
steering response and reduces the movements of the steering wheel required.
A further effect of rear-wheel steering is particularly significant at the rear,
any change in direction under dynamic driving conditions building up lateral
acceleration without a corresponding increase in the yaw rate. The separation of
these two factors gives the passengers particularly at the rear extra comfort and
an even smoother ride.
| Categories | BMW 5-Series Manuals, BMW Manuals |
|---|---|
| Tags | BMW 530d, BMW 535i, BMW 550i, BMW F07, BMW Gran Turismo, Brochure and Catalogue |
| Model Year | 2010 |
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| Copyright | Attribution Non-commercial |
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