Audi A4, S4

Since 2000 of release

Repair and car operation



Audi A4, S4
+ Introduction
+ Controls and receptions of safe operation
+ Current leaving and service
+ The engine
+ Systems of cooling, heating and the air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
- Systems of an electric equipment of the engine
   + Ignition and engine management system
   + System of preheat of the diesel engine
   + Diagnostics of systems of electronic control and the diagnostic equipment
   - Gymnastics and start systems
      The general information
      The storage battery - the basic data and acquisition of the new battery
      Check and gymnastics of the storage battery
      Replacement of the storage battery
      Storage of the storage battery
      Gymnastics system - the general data and security measures
      Check of system of gymnastics
      Removal and generator installation
      Removal and installation of a regulator of pressure/replacement of brushes
      System of start of the engine - the general information and safety measures
      Removal and starter installation
      Check of system of start of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment



Gymnastics system - the general data and security measures

The general information

Generator Bosch elements

1 — a pressure Regulator
2 — the Back casing
3 — the Insulator
4 — Stator
5 — the Forward bearing
6 — the Condenser
7 — Diodnaja assemblage
8 — the Wavy washer of the bearing
9 — the Rotor

10 — Natjazhitel of the bearing
11 — the Back bearing
12 — the Epiploon
13 — the Forward casing
14 — Krylchatka
15 — the Pulley
16 — the Nut
17 — the Prorate
18 — Shponka

In the car the alternating current generator is established. At installation of the additional electric equipment check up, that capacities of the generator was enough for a food of this equipment.

The generator drive is carried out by a ridge belt from a cranked shaft of the engine.

The generator represents the three-phase synchronous electric car with electromagnetic excitation. For transformation of an alternating current in constant the rectifier is built in the generator on diodes. Pressure is regulated by the built in microelectronic regulator of pressure.

At work of the generator the electric current proceeding on a winding of excitation, creates a magnetic stream round rotor poles. At rotor rotation under each tooth статора passes that southern northern pole of a rotor and the working magnetic stream passing through teeth статора, varies on size and pressure. This variable magnetic stream creates in a winding статора electromotive power. The klinoobraznaja form of polar tips of a rotor is picked up in such a manner that allows to receive the form of curve electromotive power close to the sinusoidal.

At high frequency of rotation of a rotor of the generator when pressure of the generator becomes more than 13.6 – 14.6 In, a regulator pressure is locked also a current through a winding of excitation does not pass. Pressure of the generator falls, the regulator opens and again passes a current through an excitation winding. The above frequency of rotation of a rotor of the generator, the is more time of a closed condition of a regulator, hence, that pressure on a generator exit more strongly decreases. Process of lock-out and regulator unlocking occurs to high frequency, therefore pressure fluctuations on a generator exit are not appreciable, and it is almost possible to consider to its constants supported at level of 13.6.14.6 Century

The system of gymnastics does not demand periodic service, however приводной a belt, the storage battery and wires with sockets should be served according to resulted in the Head Current leaving and service by intervals.

At ignition inclusion on a control panel the control lamp signalling about a discharge of the accumulator should light up. It should die away at once after engine start. If it does not die away or lights up during movement, the gymnastics system is faulty. If the lamp is not lighted at ignition inclusion or the lamp has fused, its conducting is torn off or the generator is faulty.

Security measures at work with the generator

  1. Never disconnect the battery or a pressure regulator when the engine and the generator work.
  2. Never close the plug of excitation of the generator or the cable fixed on it on weight.
  3. Never confuse wires of a regulator of pressure.
  4. Never include a pressure regulator if it is connected to weight (instant damage).
  5. Never remove the generator if the battery is not disconnected from a contour.
  6. At battery installation watch, that the negative plug was connected to weight.
  7. Never use the indicator of pressure which is connected directly in a household network (110 or 220). Use only the indicator for 12 Century
  8. Do not check diodes giving of pressure more than 12 In or мегомметром as it has too high pressure for diodes and they at check will be punched (there will be A short circuit). At check of isolation of electroconducting мегомметром it is necessary to disconnect all wires from the generator.
  9. If the battery is charged in the established condition зарядным by the device, both cables of the battery should be disconnected. The positive plug зарядного devices connect to the positive plug of the battery, and the negative plug зарядного devices - with the negative plug of the battery.
  10. Disconnect all wires from the generator and from the accumulator at electric welding of any details of a body.
  11. Check chains and knots of an electric equipment and eliminate malfunctions at the idle engine and the disconnected storage battery.
  12. Wrong connection of wires leads to destruction of the rectifier and a pressure regulator.