Audi 80/Avant (B4)

Since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ The description
+ 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
   Minus to "weight"
   Orientation in electrosystem
   Plug connections
   The central switchboard
   The additional block of the relay
   The relay and management blocks
   The unloading relay of contact Х
   Safety locks
   The table of safety locks
   Electric schemes
   + The full electroscheme of car Audi 80: the 2-litre 4-cylinder engine (66 kw)
   + The 2-litre 4-cylinder engine (85 kw)
   + The 2,3-litre 5-cylinder engine (98 kw)
   + The 2,6-litre 6-cylinder engine (110кВт)
   + Additional equipment
   + The storage battery
   - The generator
      The indicator of gymnastics of the accumulator
      Pressure regulator
      Independent repair of the generator and regulator
   Condition check клинового or полилинового a belt
   Tension клинового a belt
   Tension клинового or поликлинового a belt
   Torn клиновой a belt
   Overheat of the engine because of damage клинового a belt
   The review wedge and полиwedge belts
   Replacement клинового a belt
   The list of malfunctions
   The list of malfunctions
+ Ignition system
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications

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The generator

Firm Bosch generator (the old version), the rear view

1 – D +-connection (to the indicator of a charge of the storage battery);
2 – In +-connection (to the storage battery);

3 – a pressure regulator;
4 – the condenser of suppression of hindrances.

The generator of firm Bosch of new generation can be distinguished on a cover (1). The position (2) shows In + - a cable to the storage battery.

As Audi 80 cannot drag behind itself a lengthening cable electricity manufacture should occur directly in the car. This problem is carried out by the generator. And and not only for illumination as it was once, but also for all electric systems in Audi.

The three-phase generator of an alternating current


Approximately till December, 1991 some versions Audi 80 have been equipped 65-ampernym by the generator, now are established only 90-ampernye generators. In special variants can stand and 110-ampernye or 120-ampernye generators. To calculate capacity of the generator, it is necessary to increase the specified maximum current strength by rated voltage in 14 V.Poluchaetsja, for example 90 And х 14 In = 1260 Vt. You have already noticed: the generator in 12-voltnoj actually gives to an onboard network 14 j to the storage battery the current for a charge only thanks to this small difference in pressure can arrive.

Transfer from a pulley of a cranked shaft to a generator pulley is chosen, by the way, so that already on single turns were made about 2/3 capacities of the generator.

Service of the generator and safety precautions

The three-phase generator of an alternating current differs enough high capacity and develops a current even on single turns of the engine. Its sliding graphite contacts (brushes) maintain more than 80 000 km. According to the name it makes an alternating current which in the car is not used as the accumulator can be charged only a direct current. Therefore the generator are built in выпрямительные the diodes transforming an alternating current in the pulsing direct current. As these diodes are sensitive to a high voltage, you should remember the following:

    At the working generator it is impossible neither to weaken, nor to connect wires between the storage battery and the generator. Because of it there can be a pressure jump (pressure peaks) that will lead to diode damage. The three-phase generator of an alternating current should not work in the absence of correctly connected, serviceable storage battery because the accumulator serves some kind of the buffer from repressure. All cable connections between the three-phase generator of an alternating current, the storage battery and metal of a body or the power unit ("weight", the case) should sit strong. In dangerous peaks of pressure can result even leaky contact. At a fast charge of the accumulator (not to apply at gymnastics by means of devices to a charge with automatic switching-off) and at electric welded works on a body both wires that generator diodes have not been damaged should be disconnected from the accumulator.