since 1994 release
Repair and operation of the car
- Running gear
Protection of passengers
Full zinc covering
Concepts of the all-wheel drive
Dynamics of the movement on the dry road
Maintenance instructions of quattro cars
Mechanism of blocking of differential
Additional works on maintenance
+ Regular servicing
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
Search of malfunctions
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At four levers of an independent suspension bracket of a forward axis in Audi each wheel copes four aluminum cross levers. Two top cross levers are fixed on a design by means of rubber-metal bearings and connected to a wheel support spherical heads with the lowered friction. Both lower cross levers of a suspension bracket (on one – the bearing and conducting levers) are fixed on a stretcher by means of the rubber-metal bearing, and each of them is connected to a wheel support a spherical head with the lowered friction. The gas-filled shock-absorber and a screw spring are connected in a depreciation rack. The depreciation rack does not assume a problem of management of wheels. The additional spring from cellular polyurethane in a combination to a coupling buffer spring in shock-absorbers provides comfortable interception of strong fluctuations of a body on a forward axis.
Zadny Bridge in cars with the forward drive
The known back bridge with the interfaced levers consists from two rigid on a bend and the tortional and rigid pipelike longitudinal levers connected by a V-shaped cross profile, tortional and plastic, rigid on a bend. The additional stabilizer is welded from the ends of longitudinal levers. Thanks to it high cross rigidity of the bridge and outstanding stability of a track are reached. This back bridge has to be newly adjusted concerning many details. Thus the priority purpose is increase of comfortableness and stability of the movement, decrease in noise and reduction of weight.
Zadny Bridge of the Quattro models
The Audi A4 quattro models are supplied with dual cross levers of an independent suspension bracket of wheels, including elastic support for back wheels. The top cross levers located over wheels provide possibility of the device of a big luggage carrier.
The directing system of a suspension bracket of a wheel is provided with two triangular cross levers with the additional strezhnevy lever from each party. Shock-absorbers and screw springs are united for economy of a place in depreciation racks.
Brake system with ABS
The serial system of anti-blocking of the fifth generation with electronic distribution of brake effort of EBV provides high stability of braking in the most different traffic conditions and does unnecessary the mechanical regulator of brake effort. As electronic control of ABS possesses much more sensitive reaction, than the mechanical regulator of brake effort, the bigger range of adjustment is used significantly. To provide stability of the movement also when braking on turns, the share of brake effort on a back axis has to be lowered. EBV distinguishes by means of sensors of frequency of rotation of ABS, whether Audi A4 rectilinearly moves or passes turn. On turn the brake pressure upon back wheels decreases. Thanks to it back wheels can give the maximum effort of lateral withdrawal.
Electronic mechanism of blocking of differential of EDS
EDS serially is established on all quattro A4 models and enters a special complete set of front-wheel models with four-cylinder engines with a working volume from 1,8 l.
Electronic adjustment of pro-slipping of wheels of ASR
In the front-wheel A4 models with V6 engines with a working volume of 2,6 and 2,8 l as a special complete set for improvement of draft electronic adjustment of pro-slipping of wheels of ASR which possesses also all EDS functions is offered. If EDS includes purposeful frictional coupling for draft improvement, electronic adjustment of pro-slipping of wheels of ASR if necessary provides additional intervention in engine management. The sense of electronic adjustment of pro-slipping of wheels consists in avoiding a probuksovyvaniye of forward wheels irrespective of, how many gas the driver gives.