Audi A4

since 1994 of release

Repair and car operation



A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
- Ignition system
   That provides ignition
   When there is an ignition of a fuel and air mix?
   Different systems of ignition
   So there is an ignition spark
   Executive body
   System brain
   The signals arriving in the control unit
   Detonation adjustment
   Be careful in the address with ignition
   Works on ignition system
   Search of malfunctions in ignition
   Ignition distributor
   Knot of a high voltage
   Replacement of spark plugs
   Right choice of spark plugs
   Check of the moment of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics





So there is an ignition spark

  • The basic principle of ignition is that in the beginning the current of the accumulator passes through primary winding of the coil of ignition.
  • This winding consists of several rounds of a thick wire. Under the influence of a current round the ferromagnetic core of the coil of ignition the powerful magnetic field – energy of ignition is formed.
  • That there was an ignition spark, tension of the accumulator on the ignition coil is disconnected. It occurs at the command of the control unit on so-called «the target cascade».
  • With switching off of a current the magnetic field in the ignition coil disappears. There is a following:
  • In the secondary winding consisting of numerous rounds of very thin wire, there is a high-tension current impulse in some tens of thousands of volts.
  • This tension goes to that spark plug which just is on turn as ignition. The fuel and air mix ignites, the engine continues to work. The electric chain again becomes isolated, and the new cycle begins.