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
- Ignition system
   Various systems of ignition
   Principle of work of ignition
   Executive office
   System "brain"
   Impulses for the management block
   Regulation on a detonation
   Security measures at work with ignition system
   Repair of system of ignition
   Diagnostics of system of ignition
   The ignition distributor
   The gauge of detonation combustion
   High voltage elements
   Replacement of spark plugs
   Spark plugs
   Check of the moment of ignition
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications



Principle of work of ignition

If to construct the diagramme of dependence of a corner of an advancing from loading and number of turns of the engine the so-called characteristic of ignition will turn out. The страннее its form, the more precisely ignition looks is co-ordinated with a corresponding operational situation of the engine.

  • The main principle of ignition consists that the current from the storage battery arrives at first on a primary winding of the coil of ignition.
  • This winding consists of several coils of a thick wire. Under the influence of an electrocurrent round the iron core in the ignition coil there is a powerful magnetic field – the energy arriving in system for ignition.
  • If the piston comes nearer to a point in which the arrived and compressed mix should ignite – to the ignition moment, – the current in the ignition coil interrupts. It occurs at the command of the management block in the electronic switchboard of system of ignition.
  • At switching-off of a current the magnetic field in the ignition coil interrupts. Thus there is a following: in the secondary winding consisting of very considerable quantity of coils of a thin wire, there is an impulse of a power-current in size in some tens thousand volt.
  • This secondary pressure of system of ignition arrives through the distributor (at models with the 6-cylinder engine directly) on that spark plug which sequence has approached in an operating procedure of cylinders of the engine. The mix ignites, the engine is turned further. The electrochain becomes isolated, process repeats.