Audi 100

1982-1990 of release

Repair and operation of the car




Audi 100
+ 1.1. Governing bodies and devices
+ 2. Technical characteristics
+ 3. Engines
+ 4. Cooling system
+ 5. Exhaust system
+ 6. Power supply system
+ 7. Transmission
+ 8. Running gear
+ 9. Steering
+ 10. Brake system
+ 11. Body
- 12. Electric equipment
   + 12.1. System of electric equipment
   - 12.2. System of ignition
      + 12.2.1. Transistor system of ignition
      + 12.2.2. Electronic system of ignition
      12.2.3. Contactless system of ignition of FEI
   + 12.3. Electric circuits










12.2. System of ignition

GENERAL INFORMATION

On Audi 100 cars apply two types of system of ignition: contactless transistor system on cars without turbo-supercharging and electronic system on cars with a turbo-supercharging.

The transistor system consists of the distributor of ignition, the coil of ignition, the control unit of ignition, candles and wires of a high and low voltage.

The sensor of impulses of the distributor of ignition works by the principle of effect of the Hall.

The system of ignition has two electric chains: high and low voltage.

The high-voltage chain consists of a high-voltage winding of the coil of ignition, a distributor cover with a contact piece of coal, the runner of the distributor, spark plugs and high-voltage wires, a low-voltage chain – of the lock of ignition, primary winding of the coil of ignition and the block of impulses of the distributor developing signals for the control unit. The block of impulses, or the Hall sensor, consists of a winding, a permanent magnet and the chip forming signals. The control unit is located in a compartment of the engine and represents the electronic switchboard which, receiving signals of the block of impulses, operates current in primary winding of the coil of ignition.
The distributor of ignition has centrifugal and vacuum regulators for correction of a corner of an advancing of ignition depending on the frequency of rotation of a cranked shaft of the engine and loading.

Electronic ignition includes the ignition coil, a rapredelitel, the control unit, spark plugs, sensors, wires of a high and low voltage.

The sensor of impulses of the distributor also works by the principle of effect of the Hall. The electronic control unit receives information from various sensors on engine loading, frequency of rotation of a cranked shaft etc. and calculates the most effective corner of an advancing of ignition. Besides, the block constantly controls work of all system and warns the driver about serious malfunctions of system in case of their emergence by means of a control lamp.