Features of the device and the principle of operation of the ignition system

On a car, the ignition system does not use a traditional distributor. A four-pin ignition coil is used here, consisting of two two-pin ignition coils combined into one unit. The current in the primary windings of the ignition coils is controlled by a controller that receives information from sensors and uses two powerful transistor valves.

The ignition system has no moving parts and therefore requires no maintenance or adjustments.

The ignition system uses a spark distribution method called the spark distribution method «idle» sparks. The engine cylinders are combined in pairs 1-4 and 2-3, sparking occurs simultaneously in two cylinders: in the cylinder in which the compression stroke ends (working spark), and in the cylinder in which the exhaust stroke occurs (idle spark).

Due to the constant direction of the current in the windings of the ignition coils, the sparking current in one candle always flows from the central electrode to the side electrode, and in the second - from the side to the central one.

The ignition system uses A17DVRM spark plugs or their foreign counterparts. The controller controls the ignition in the system. The crankshaft position sensor provides the controller with a reference signal, on the basis of which the controller calculates the firing sequence of the coils in the ignition module. To precisely control the ignition, the controller uses the following information:

• crankshaft speed;
• engine load (mass air flow);
• coolant temperature;
• crankshaft position;
• presence of detonation.