Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car

Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
- Body electrical system
   Minus to "weight"
   Orientation in the electrical system
   Plug connections
   Central switchboard
   Additional block of the relay
   Relay and control units
   Unloading relay of contact of X
   Safety locks
   Table of safety locks
   Electric circuits
   + Full electroscheme of the Audi 80 car: 2-liter 4-cylinder engine (66 kW)
   + 2-liter 4-cylinder engine (85 kW)
   + 2,3-liter 5-cylinder engine (98 kW)
   + 2,6-liter 6-cylinder engine (110kvt)
   + Additional equipment
   - Battery
      On reserves how many are enough?
      Control of level of electrolyte
      Check of a battery charging
      Battery charging
      Start of the engine with the discharged accumulator
   + Generator
   Check of a condition of a maple or polilinovy belt
   Tension of a maple belt
   Tension of a maple or poliklinovy belt
   The belt torn maple
   Engine overheat because of damage of a maple belt
   Review of maple and poliklinovy belts
   Replacement of a maple belt
   List of malfunctions
   List of malfunctions
+ System of ignition
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications

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The battery is the center of the onboard Audi 80 electrical system. Various consumers of food use a stock of its energy, and the battery from the generator is charged.

Principle of work

The electrode (lead plate) contacts to the divorced sulfuric acid (electrolyte) and gives under the influence of solution positive ions, that is the chastets electrically loaded, to electrolyte. Thereby between electrolyte and a lead plate voltage is created.

However it is, not enough, tension created as a result "voluntary" transition of charged particles and on the accumulator give a charge voltage. As a result of it sulfate of lead of the discharged battery turns on a positive electrode into lead dioxide, and on the negative – into spongy lead. At the same time in electrolyte sulfuric acid, an external sign of almost complete process of charging – emergence of vials of gas is again formed.

At a discharge of the accumulator there is the return process. Dioxide of lead of a positive plate and spongy lead negative again turn into lead sulfate, and sulfuric acid is spent, and water is formed. Therefore with a discharge of the battery acid density decreases.

Designation of the battery

In the Audi 80 models with 4-and 5-cylinder engines the battery is located behind on the right in a motor compartment. In models with the 6-cylinder engine: the accumulator is located at the left ahead in a motor compartment. On installation sites it is protected by a cover.
On Audi 80 the following batteries are installed:

  • 12 B/40 Ach, standard number 54045 (all 4-cylinder engines)
  • 12 B/63 Ach, standard number 56318 (5-and 6-cylinder engines)

Battery parameters

Tension and capacity: 12 B/40 Ach the first (12 V), of course, specifies tension in designation. Behind inclined line the current which the accumulator is capable to give for a unit of time is specified – Ach means ampere-hours. It is the nominal capacity of the battery measured according to standard conditions. In practice it is necessary to count only on 2/3 specified ampere-hours; at older accumulator only on a half.

Current of cold scrolling: number 220 A or 300 A specifies the current which the battery can give at a temperature minus 18 °C.

Standard number: the five-digit number serves at all German producers of batteries for identification of the accumulator. For Audi the corresponding numbers are 54045 or 56318. The first (5) means tension of the battery of 12 Century. The following then figures 40 or 63 specify accumulator capacity. Both last figures designate constructive signs, such as model, a polyusnost, a hose for removal of gases and an otbortovka.