The injection duration depends on the following parameters: air quantity, engine temperature, engine speed, intake air temperature, throttle position, oxygen content s in the exhaust gases.
Pic. 154. DIGIJET fuel injection system: 1 - location of the main fuel pump and fuel filter (under the bottom of the car in front of the fuel tank); 2 - holder; 3 - fuel supply line to the pressure regulator; 4 - nut (10 Nm); 5 - fuel filter (the arrow indicates the direction of fuel flow); 6 - return fuel line from the fuel tank; 7 - pump accumulator; 8 - fuel line from the supply fuel pump; 9 - fuel return line from the fuel pressure regulator;. 10 - grid; 11 - main fuel pump; 12 - sealing ring; 13 - fixing ring; 14 - adapter (when removing, press the tabs of the latch and pick it up with a screwdriver)
The intake air quantity and outside air temperature are measured by the air mass meter, which is located between the air filter and the intake pipe. The control unit compares these values with the engine temperature and throttle position, which is reported to the control unit by the throttle switch. Information about the engine speed is transmitted to the control unit from terminal 1 of the ignition coil. Information about the residual oxygen content is transmitted from the oxygen sensor, as a result of which the required duration of fuel injection is calculated.
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