7.8. System of ignition

The system of ignition creates in each cylinder of the engine at some point the spark category which ignites the compressed gas mixture. For formation of a spark in the ignition coil tension of the battery of 12 V will be transformed to the high voltage of ignition of 25 000-30 000 Century.
For definition of the moment of ignition the control unit uses information which is stored in memories, and information from the sensors installed on the engine. The system of ignition receives the operating signals from Hall's sensor or the pulse sensor. In addition the control unit corrects the moment of ignition and on a signal from the detonation sensor which is sensitive to premature ignition, respectively reduces an ignition advancing corner.

Preventions
Not to damage semiconductor devices (diodes and transistors) at work on system of ignition, it is necessary to fulfill the following requirements:
– in operating time of the engine do not disconnect the rechargeable battery, the generator or any electric sockets;
– when carrying out any works remove the negative plug from the rechargeable battery;
– during electrowelding works on the car switch-off the generator and the control unit;
– do not allow operation of the engine with the generator disconnected from electric system.
Do not touch high-voltage wires by a hand and do not disconnect them during the operation of the engine or during a provorachivaniye of a bent shaft of the engine a starter.
Disconnect wires of system of ignition and a wire of measuring devices only at the switched-off ignition.

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


Fig. 4.1-23. The fuel highway with nozzles: 1 – a fuel supply tube from the fuel filter; 2 – fuel return tube; 3 – bolt, 10 N · m; 4 – spring connector; 5 – sealing rings; 6 – fuel pressure regulator; 7 – fuel highway; 8 – spring connector; 9 – sealing ring; 10 – nozzle; 11 – sealing ring; 12 – inlet collector


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


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