Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation



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
+ injection System
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrosystem
- Ignition system
   Various systems of ignition
   Principle of work of ignition
   Executive body
   System "brain"
   Impulses for the control unit
   Regulation on a detonation
   Security measures at work with ignition system
   Repair of system of ignition
   Diagnostics of system of ignition
   Ignition distributor
   Sensor of detonation combustion
   Elements of a high voltage
   Replacement of spark plugs
   Spark plugs
   Check of the moment of ignition
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications





Executive body

Electronic transistor switchboard

In the electronic switchboard there is a powerful transistor which switches on and off current giving to the ignition coil (or to ignition coils). Thus, huge tension cannot prevent operation of sensitive electronics of the control unit. However the transistor submits a current not to that moment, in which sensor of the Hall (with 4-and 5-cylinder engines) or the sensor of the moment of ignition (models with 6-cylinder engines) deliver to model the impulses. The control unit independently defines a certain moment of ignition, giving that an inclusion/switching off impulse.