Block diagram of the ESC II control system
The ESC II carburetor and ignition fuel mixture control system includes an electronic control unit, an ignition coil, an ignition distributor with a built-in engine speed sensor, spark plugs and sensors for coolant temperature, intake manifold vacuum and automatic transmission selector lever neutral position.
The ESC II electronic control unit controls the fuel and ignition systems simultaneously, which helps to achieve maximum power and fuel economy across the entire engine load range.
The electronic control unit of the ESC II system receives signals from the sensors and, based on the information received, the unit controls the supply of voltage to the primary winding of the ignition coil and interrupts the current and, depending on the ignition advance angle, which is determined based on the information from the sensors, supplies a high-voltage pulse through the distributor to the corresponding spark plug and ignites the fuel mixture in the cylinder. Depending on the information received from the sensors, a constant change in the time intervals of supplying and disconnecting the current from the primary winding of the ignition coil is performed, as a result of which the ignition advance angle changes in relation to the initial ignition setting angle. Also, based on the signal from the control unit, the intake manifold is heated and the engine idle speed is controlled.
All work related to checking the operation of the ESC II system components must be performed using special equipment at a service station.
If there is an error in any of the data received from the sensor, the ESC II system enters the backup mode. In this case, the ESC II system ignores the incorrect sensor signal and adopts a pre-programmed value that will allow the engine to continue to operate (albeit with reduced efficiency).
The original source of the publication is on the website: Fordbook.ru