Repair and service Audi A8 in body D2 with 1994 for 1999 of release.
1. Car operation
2. Maintenance service
3. Petrol engines of 2,8 l
4. Petrol engines of 3,7 and 4,2 l
5. Diesel engines of 2,5 l
6. Diesel engines of 3,3 l
7. Systems of ignition and injection of fuel of petrol engines
7.1. The general data
7.2. Safety requirements and preventions
7.3. Work of a control system as the engine
7.4. Check of system of injection of fuel
7.5. A fuel tank
7.6. The fuel pump / the gauge of level of fuel
7.7. An accelerator cable
7.8. Ignition system
8. System of release of the fulfilled gases of cars with petrol engines
9. The power supply system of diesel engines
10. System of prestarting heating of diesel engines
11. System of release of the fulfilled gases of cars with diesel engines
12. Greasing system
13. Cooling system
14. Coupling
15. A transmission
16. Shaft of a drive of forward wheels
17. Features of a design of transmission of all-wheel drive cars
18. A suspension bracket
19. Wheels and tyres
20. A steering
21. Brake system
22. A body
23. Heating and air-conditioning system
24. An electric equipment
25. Electric schemes


7.8. Ignition system

The ignition system creates in each cylinder of the engine at a given time the spark category which ignites the compressed gas mixture. For spark formation in the coil of ignition pressure of the battery 12 In will be transformed to a high voltage of ignition 25 000-30 000 Century
For definition of the moment of ignition the management block uses the information stored in memory, and the information from the gauges established on the engine. The ignition system receives operating signals from the gauge of the Hall or the pulse gauge. In addition the management block corrects the moment of ignition and on a signal from the gauge of a detonation which is sensitive to premature ignition, accordingly reduces a corner of an advancing of ignition.

Not to damage semi-conductor devices (diodes and transistors) at work on ignition system, it is necessary to fulfil following requirements:
– In an operating time of the engine do not disconnect the storage battery, the generator or any electric sockets;
– At carrying out of any works remove the negative plug from the storage battery;
– During electrowelding works on the car disconnect the generator and the management block;
– Do not suppose work of the engine with the generator disconnected from electric system.
Do not concern high-voltage wires with a hand and do not disconnect them at work of the engine or during time проворачивания a cranked shaft of the engine a starter.
Wires of system of ignition and wire of measuring devices disconnect only at the switched off ignition.

Fig. 4.1–22. The air filter: 1 – an air line; 2 – a measuring instrument of the expense of air G70; 3 – a collar; 4 – an inlet air line; 5 – a collar; 6 – a soaking up air line; 7 – a nut; 8 – a rubber pillow; 9 – a filtering element of the air filter; 10 – the case of the air filter; 11, 12 – an air line

Fig. 4.1–23. A fuel highway with atomizers: 1 – a tube of a supply of fuel from the fuel filter; 2 – a tube of return of fuel; 3 – a bolt, 10 Нм; 4 – a spring connector; 5 – sealing rings; 6 – a regulator of pressure of fuel; 7 – a fuel highway; 8 – a spring connector; 9 – a sealing ring; 10 – an atomizer; 11 – a sealing ring; 12 – an inlet collector

Fig. 4.1–24. Throttle knot and system of switching of an inlet collector: 1 – the top part of an inlet collector; 2 – a bolt, 10 Нм; 3 – a bolt, 20 Нм; 4 – a lining; 5 – the valve of stabilisation of idling N71; 6 – a bolt, 10 Нм; 7 – a bolt, 6 Нм; 8 – a flange; 9 – the basis of an inlet collector; 10 – a lining; 11 – a bolt, 10 Нм; 12 – the vacuum chamber of the valve of switching of an inlet collector; 13 – a bolt, 20 Нм; 14 – throttle knot; 15 – a lining; 16 – a bolt, 20 Нм; 17 – the mechanical valve of system рециркуляции the fulfilled gases (EGR); 18 – the gauge of temperature EGR G98; 19 – a bolt, 10 Нм; 20 – a lining; 21 – a bolt, 10 Нм

Fig. 4.1–25. Elements of system of ignition: 1 – the block of engine management J192;
2 – a 4-contact electric socket of brown colour from the engine management block; 3 – switchboard N122; 4 – a 3-contact electric socket of dark brown colour from primary windings of coils of ignition; 5 – a 3-contact electric socket from the gauge of detonation G66; 6 – the gauge of Hall G40; 7 – the gauge of installation of a corner of an advancing of ignition G4 on the left block of cylinders; 8 – the gauge of detonation G66; 9 – coils of ignition N, N128, N158; 10 – the gauge of detonation G61; 11 – a tip with a spark plug; 12 – an electric socket of the gauge of installation of a corner of an advancing of ignition G4; 13 – an electric socket of the gauge of detonation G61; 14 – an electric socket of coils of ignition; 15 – to connection S115 (it is located in the block of the relay and fuses); 16 – 16-contact electric socket C of brown colour; 17 – 20-contact electric socket B of red colour; 18 – 12-contact electric socket A of black colour; 19 – 16-contact electric socket D of green colour

7.7. An accelerator cable

8. System of release of the fulfilled gases of cars with petrol engines