The main elements of the EZL type ignition system are spark plugs (one for each cylinder), high voltage wires, distributor, electronic ignition coil and electronic control unit (ECU) together with the corresponding sensors, actuators and wires. The location of the elements may vary depending on the model, but the main functions of the parts are the same.
The main function is the following. The control unit supplies power to the primary winding of the ignition coil. The supply voltage is periodically interrupted by the electronic control unit and this is manifested in the disappearance of the magnetic field, which induces an even greater voltage, called high voltage, in the secondary winding of the coil. This high voltage is supplied by the distributor via high voltage wires to the spark plugs in the cylinders at a certain moment. The spark plug electrodes have a gap small enough for a spark to occur between them and the spark that jumps ignites the fuel-air mixture in the cylinder. The ignition timing has a critical effect on engine operation and is therefore controlled exclusively by the ECU.
The ECU determines and controls the ignition timing and, first of all, the angle of the closed state of the contacts, in accordance with information about engine speed, crankshaft position and the degree of vacuum in the intake manifold received from sensors mounted on the engine. Other parameters that determine ignition timing are throttle position, intake air temperature, and coolant temperature. These parameters are also monitored by sensors located on the engine.
The ignition timing can be changed in steps to suit the type of fuel being used. This is achieved using a compensator socket located in the engine compartment next to the ignition ECU - refer to paragraph 5 for more information.