BMW 325i Bedienungshandbuch PDF herunterladen (Seite 173)

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Index Data Technology Repairs Car care Controls Overview

On vehicles with an automatic trans-

mission, the Adaptive Transmission

Control (ATC) uses a number of factors

to calculate the gear which provides

maximum efficiency. In this process, it

considers your individual driving style

as well as current driving conditions.

ATC recognizes your personal driving

style from the positions and movements

of the accelerator pedal, deceleration

when braking, and lateral acceleration

through curves. Based on different shift

characteristics – from comfort-oriented

to performance-oriented – ATC will

select the appropriate gear.

463us005

In order to include driving conditions in

its calculations, ATC registers curves

and both uphill and downhill gradients.

For example, if you maintain speed

through a curve, the transmission does

not shift up. On uphill gradients, it shifts

up only when the engine speed

increases in order to make more effi-

cient use of power reserves. On down-

hill gradients, ATC shifts down when

the speed of the vehicle increases and

the driver must apply the brakes.

Highly sensitive sensors monitor the

number of revolutions of the wheels,

steering angle, lateral acceleration,

brake pressure and the movement of

the vehicle around its vertical axis.

If differences in the wheel speeds

occur, ASC+T recognizes the danger of

wheelspin and reduces torque. If

necessary, the system also responds

with additional brake applications at the

rear wheels.

In addition, DSC permanently monitors

the vehicle's current operating condition

and compares it with an ideal condition

that is calculated from the sensor's

signals. If deviations from this occur

(understeering or oversteering, for

instance), DSC can stabilize the vehicle

in fractions of a second by reducing

engine output and with the assistance of

braking intervention at individual

wheels. As a result, dangerous skids can

be prevented even as they are just

beginning.

You may need some time to become

accustomed to this system's interven-

tion. However, it provides optimum drive

force and vehicle stability.

The braking intervention may be

accompanied by sounds specific to the

system.

ATC* ASC+T/DSC*

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