Electrical diagram of an integrated microprocessor engine control system (KMSUD)
The ZMZ-406 engine is equipped with a microprocessor ignition system, which consists of a control unit for fuel injection and ignition systems, two ignition coils of types 30.3705 or 301.3705, spark plugs, high-voltage and low-voltage wires.
The control unit is installed in the car interior on the right side under the instrument panel, behind the body side trim.
The ignition coils are installed on the cylinder head cover.
The control unit receives signals from sensors installed on the engine and, based on this, adjusts the ignition timing, which allows for optimal power, economic and toxicity indicators.
The electrical diagram of the engine control system is shown in Figure 1.
The ZMZ-402 and ZMZ-4021 engines are equipped with a non-contact ignition system consisting of a transistor switch, an ignition distributor of type 19.3706, an ignition coil of type B116 or B116-01, spark plugs and high-voltage and low-voltage wires.
Ignition distributor sensor (1908.3706) – non-contact, with a control pulse sensor (generator) and built-in vacuum and centrifugal ignition timing regulators.
The distribution sensor performs two functions: it sets the moment of sparking and distributes high voltage pulses among the cylinders in accordance with their operating order.
For this purpose, use a slider mounted on the shaft of the sensor-distributor. A noise suppression resistor* is installed in the slider.
The switch (1313734) opens the power circuit of the primary winding of the ignition coil, converting the sensor control pulses into current pulses in the ignition coil.
* On some of the sensors, instead of a resistor, a cover with a central carbon contact is installed.
The ignition installation for the ZMZ-402 engine can be viewed in the article: Ignition installation for the GAZ-3110