Audi 80/Avant (B4)

Since 1991-1995 of release

Repair and car operation



Audi 80/Avant
- The description
   Engines
   Transmissions
   Body
   The chassis
   15-inch wheels
   Brake system
   Seats
   Passive safety
   Full drive
   Distributive Torsen-differential
   Dynamics of movement at a dry road covering
   Instructions on operation for all-wheel drive cars
   Blocking of differential of the back bridge
   Motor compartment
   Regular servicing
   The workplace organisation
   Lubricant works
   The oil expense
   Correct choice of engine oil
   Replacement of engine oil and the oil filter
   Check of level of a working liquid of the amplifier of a wheel
   Check of level of oil of a mechanical transmission
   Check of level of oil in a drive of the back bridge
   The control of level ATF in an automatic transmission
   Check of level of oil in the main transfer of an automatic transmission
   Replacement ATF
   Greasing тросовых drives, hinges and locks
+ Engines
+ System of release of the fulfilled gases
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and воздухозаборные channels
+ Injection system
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Antiblocking system of brakes
+ Wheels and tyres
+ Kuzovnaja electrosystem
+ Ignition system
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications



Distributive Torsen-differential

As it has already been told, distributive (or interaxal) the differential is necessary for an equilibration of forces between forward and back bridges. (Differentials of forward and back bridges work irrespective of it).

It is located behind in one block with a transmission.

By the way, name Torsen occurs from firm Gleason, the manufacturer of transmissions where this differential has been invented. This name – reduction from English words Torque Sensing that means approximately «a feeling twisting moment». Thereby it is as though the action description:

  • This differential transfers to the bridge with the best coupling with road big приводную force.
  • It occurs in such a manner that one bridge can transfer in 3,5 times the big force, than another.
  • But at equally good covering (under both bridges) there is a uniform distribution of traction force to the forward and back bridge – any preference to one of leading bridges.

Work principle

The Torsen-differential is based on a principle of a worm gear and uses its main principles:

  • The worm gear can be calculated in such a manner that it will possess high or low factor of blocking.
  • The size of factor of blocking depends on an angle of lead of a worm – that is from that, how many is located on a worm of flat or abrupt coils.
  • Example of a flat worm with high factor of blocking is the automobile jack in which the starting handle, influencing a worm though raises the car, but the car, despite the weight, never can untwist the starting handle and release a jack.

The device

Thanks to the witty device consisting as a whole from eight worm wheels and 12 gears, in connection with the differential case, hollow shaft, forward and back leading semiaxes the action described in last section is reached in the best way.