BMW
Media
Information
5/2009
Page 42
The innovative elastokinematic swing arm mounts serve to provide suspension
qualities formerly incompatible with one another, now enhancing both driving
dynamics and motoring comfort. Longitudinal forces, for example, are set off to
the rear by the straight-line spring action of the swing arm, effectively separating
radial and axial forces acting on the swing arm rubber mounts.
Irrespective of load conditions, the spring position on the wheel mounts ensures
a consistently low pre-load on the rubber mounts on the subframe – and a
further advantage of this effective separation of road conditions and drive forces
is the first-class acoustic and vibration comfort offered in this way.
The BMW 5 Series Gran Turismo comes as standard with air suspension at
the rear optimised once again over the system featured on the BMW 5 Series
Touring and serving to maintain consistent ride height under all driving and
load conditions.
The air suspension immediately considers even the slightest change in the
load the car is carrying, setting off different load conditions individually on each
wheel and thus minimising the need for subsequent control action in response
to spring movement caused by bumpy surfaces and body roll in bends. In the
event of rear tyre damage, finally, the air suspension takes the load off the
wheel involved and sets off the difference in ride height caused by the loss
of pressure.
The BMW 550i Gran Turismo comes as standard on 19-inch light-alloy wheels.
All other variants of the BMW 5 Series Gran Turismo are equipped as
standard with 18-inch light-alloy wheels. Likewise standard, 245/45 R 19
runflat safety tyres at the front and 245/40 R 19 runflat tyres at the rear of the
top model and, respectively, 245/50 R 18 runflat tyres front and rear on the
BMW 535i Gran Turismo and the BMW 530d Gran Turismo enable the driver to
continue after a puncture, even if the tyre is completely empty, covering up to
250
kilometres or 155 miles in the process. A further significant point is that the
Tyre Defect Indicator permanently monitors tyre pressure, warning the driver as
soon as pressure drops by more 20 per cent.
Integral Active Steering controlling the steering angle on the front
and rear wheels.
Hydraulic rack-and-pinion steering with Servotronic provided by an on-demand
steering assistance pump ensures the usual precision of a BMW when enter-
ing bends and in maintaining superior straight-ahead directional stability in
the BMW 5 Series Gran Turismo. When driving in a straight line the volume
| 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 |
| Download File |
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| Document File Type | |
| Copyright | Attribution Non-commercial |
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