Mercedes W124

since 1985-1995 of release

Repair and car operation



W124 Mercedes
+ Governing bodies and control devices
+ MAINTENANCE
+ 2. Maintenance (diesel engines)
+ ENGINE
+ 4. Repair of 6-cylinder petrol SOHC engines
+ 5. Repair of 6-cylinder petrol DOHC engines
+ 6. Repair of the diesel engine established in the car
+ 7. Major maintenance of engines
+ COOLING SYSTEM
+ FUEL SYSTEM
+ 10. System of injection of BOSCH CIS-E fuel (KE-JETRONIC)
+ 11. System of injection of BOSCH HFM fuel
+ 12. Fuel system of diesel engines
+ 13. Fuel system of diesel engines
+ SYSTEMS OF START, IGNITION
- 15. System of ignition of 4-cylinder petrol engines
   15.2. System of ignition of EZL
   15.3. System of ignition of TFZ
   15.4. Check of system of ignition
   15.5. Ignition coil
   15.6. Ignition distributor
   15.7. Distributor rotor
   15.8. Corner of an advancing of ignition
   15.9. Elements of a control system of ignition
+ 16. System of ignition of four-cylinder petrol engines
+ PRESTARTING HEATING
+ TRANSMISSION
+ 19. Mechanical transmission
+ 20. Automatic transmission
+ POWER SHAFTS
+ BRAKE SYSTEM
+ SUSPENSION BRACKET
+ BODY
+ ELECTRIC EQUIPMENT
+ CHECK OF MALFUNCTIONS






15.2. System of ignition of EZL

GENERAL INFORMATION

The system of ignition of EZL includes spark plugs, high-voltage wires, the ignition distributor, the coil of ignition and the electronic control ECU device together with sensors, executive mechanisms and electric wires. A principle of action of system of ignition identical irrespective of an arrangement of knots and elements of system of ignition depending on car model.

The control unit submits ignition tension on primary winding of the coil of ignition. During the demanded moment the control unit disconnects tension from the ignition coil that leads to falling of a magnetic field in primary winding and induces a high voltage in a secondary winding of the coil of ignition. High-voltage tension at some point from the ignition coil via the distributor of ignition and high-voltage wires moves to a certain spark plug. At receipt of a high voltage on a spark plug between electrodes of a spark plug the spark which sets fire to fuel - an air mix in the engine cylinder is formed. Definition of the moment of firing fuel - an air mix is carried out by the electronic control device.

Definition of a corner of an advancing of ignition and its continuous adjustment is carried out by the electronic control device (ECU) on the basis of information on engine turns, the provision of a cranked shaft and depression in the inlet collector, received from the sensors established on the engine. Also at definition of a corner of an advancing of ignition information on the provision of a butterfly valve (acts in film from the switch of extreme provisions of a butterfly valve), to the air temperature, arriving in the engine and temperature of cooling liquid is considered.

Depending on applied type of fuel the initial corner of an advancing of ignition can be changed the switching cap placed in a motor compartment near the ECU block.