Audi A4

since 1994 release

Manual of the car


Audi A4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
- Suspension bracket of wheels and steering
   Running gear
   Check of cuffs of the steering mechanism
   Check of dustproof caps and gap in heads of cross steering draft
   Check of dustproof caps of hinges of an axis
   Check of a side play of a steering wheel
   Check of a maple belt
   Check of level of oil
   Check of a gap of the wheel bearing
   Shock-absorbers
   Check of shock-absorbers
   The help at malfunctions
   Adjustment of wheels
   Measurement of adjustment of wheels
   The help at malfunctions
   Independent works on a running gear and steering
   Dismantling of a suspension bracket of forward wheels
   Works with the back bridge
   Replacement of the shock-absorber behind
   Steering
   Works on steering
   Check of tightness of a servoupravleniye
   Poliklinova belt
   The help at malfunctions
   Adjustment of the steering mechanism
   Dismantle of the pump of a servoupravleniye
   Filling and pumping of system of a servoupravleniye
   Safety cushion
   Instructions of safety
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics

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Adjustment of wheels

In order that you could imagine better the concepts connected with adjustment of wheels, we represented it in the drawing. At the left the convergence, in the middle negative disorder is explained, and on the right you see the image of a longitudinal inclination шкворня.

 

Forward wheels to provide reliable behavior of the car, have to settle down under a certain corner in the side and longitudinal direction. In order that you got some idea about the concept "steering geometry", the explanation of concepts is provided here:

Track width: in Audi A4 forward wheels are at rest reduced a little more, than back. At the same time say that track width "positive" or the car has "a convergence of wheels". Friction between a wheel and the road wrings out the left wheel to the left, and right to the right. It is somewhat leveled by forces of the forward drive which seek to pull together forward wheels. At turn of the car the convergence of forward wheels passes into "divergence". It becomes at the expense of a trapezoid arrangement of steering drafts: the wheel, internal in relation to turn, is developed stronger, than external. It is also necessary as on turn internal wheels describe a smaller circle, than external.

Disorder: so the easy inclination of forward wheels to outer side – above in a wheel niche of Audi A4 between them smaller distance, than below at the earth is called. In language of professionals it is called "negative" disorder.

Cross inclination: it is related to disorder. The cross inclination represents an insignificant inclination of an axis around which at control of car wheels together with a suspension bracket turn. Both cross axes have above smaller distance, than below.

Longitudinal inclination: understand an inclined arrangement of rotary axes in the longitudinal direction of the car as it. It also promotes stabilization of the rectilinear movement and does not allow fluctuation of forward wheels.