since 1994 of release
Repair and car operation
- Running gear
Protection of passengers
Full zinc covering
Drive concepts on all wheels
Dynamics of movement on the dry road
Maintenance instructions of quattro cars
Mechanism of blocking of differential
Additional works on maintenance
+ Regular servicing
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
Search of malfunctions
At four levers of an independent suspension bracket of a forward axis in Audi each wheel copes four aluminum cross-section levers. Two top cross-section levers are fixed on a design by means of rezinometallichesky bearings and connected to a wheel support spherical heads with the lowered friction. Both bottom cross-section levers of a suspension bracket (on one – bearing and conducting levers) are fixed on a stretcher by means of the rezinometallichesky 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 an amortization rack. The amortization 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 a forward drive
The known back bridge with the interfaced levers consists of two rigid on a bend and the krutilno-rigid pipelike longitudinal levers connected by krutilno-plastic, rigid on a bend by a V-shaped cross-section profile. The additional stabilizer is welded with the ends of longitudinal levers. Thanks to it high cross-section rigidity of the bridge and outstanding stability of a track are reached. This back bridge should be newly adjusted concerning many details. Thus the priority purpose is increase of comfortableness and stability of movement, decrease in noise and weight reduction.
Zadny Bridge of the Quattro models
The Audi A4 quattro models are supplied with dual cross-section levers of an independent suspension bracket of wheels, including elastic support for back wheels. The top cross-section 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-section levers with the additional strezhnevy lever from each party. Shock-absorbers and screw springs are incorporated for economy of a place in amortization 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 a mechanical regulator of brake effort. As electronic control of ABS possesses much more sensitive reaction, than a mechanical regulator of brake effort, essentially bigger range of adjustment is used. To provide stability of movement also when braking on turns, the share of brake effort on a back axis should be lowered. EBV distinguishes by means of sensors of frequency of rotation of ABS, whether Audi A4 rectilinearly moves or passes turn. On turn 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 is serially established on all quattro A4 models and enters into a special complete set of front-wheel models with four-cylinder engines with 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 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.