Audi Q5 - Manuel de service télécharger pdf (Page 53)

297x198_Q5_Q5hybrid_Fas_09_Bild_53 53 16.03.12 11:11

Everybody defines driving dynamics differently. We

define it like this: drive exactly how you feel. With

the optional Audi drive select*, you can influence

individual vehicle components at the push of a

button and so change the character of your Audi.

You have five modes to choose from: comfort,

dynamic, auto, efficiency and, in conjunction with

an optional MMI navigation system, individual

mode, allowing you to determine yourself how the

associated vehicle components should behave. The

comfort mode is especially suitable for providing

the most relaxed driving possible on long journeys.

The auto mode offers a generally comfortable yet

firm driving experience. For particularly sporty

driving, for example on winding roads, there is the

dynamic mode. The efficiency mode improves the

car’s overall consumption. As an integral part of

Audi drive select, it is characterised by more

energy-efficient operation of the engine and

auxiliary consumers, and a modified gear change

program in models with automatic transmission.

In every mode, the vehicle adjustments depend

on the equipment present. Thus Audi drive select

influences the engine, the steering and, in the

case of S tronic or tiptronic, the gear changing

behaviour of the automatic transmission. The

engine and gears react more spontaneously or in

a more balanced manner to movements of the

accelerator, depending on the mode chosen.

Moreover, the engine speeds at which gear

changes take place are varied – in dynamic mode,

they only happen at higher engine speeds, while

in comfort mode they take place at lower ones.

The steering can also be adapted to the driving

situation, from sporty and firm to comfortable,

Audi drive select also influences other optional

equipment such as damper control, dynamic

steering and adaptive cruise control.

* Not available for the Q5 hybrid quattro. The fuel consumption and CO₂ emission figures can be found from page 106 onwards.

engine/accelerator

dynamic steering

electromechanical power steering

suspension with damper control

automatic transmission

adaptive cruise control

With dynamic steering, the Audi engineers have

solved a problem that has kept many vehicle

manufacturers busy: how to develop a steering

system where the steering ratio and steering force

adjust automatically to the driving speed. In the

search for a gear system that reacts to the current

vehicle status, the Audi engineers came across a

system that was originally developed for NASA: the

strain wave gearing, characterised by an elastic

transfer element. It was used for the first time in

1971 for the Lunar Rover reconnaissance vehicle

during the fourth moon landing, and again in the

Mars Sojourner that explored the Red Planet

autonomously in 1997. It is currently being used in

the Mars Spirit vehicle. Audi uses the strain wave

gearing for its dynamic steering, where it ensures

an excellent and dynamic steering feel, whatever

the speed. For this steering system, Audi was

awarded the inaugural “Award for Mechatronic

Innovation” by the VDI (The Association of German

Engineers) in 2009.

About dynamic steering

Strain wave gearing

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Audi Q5 - Manuel de service Page 53

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