Injection control
The injection is controlled sequentially. The injection order corresponds to the ignition order. Based on the sensor signals, the duration of the opening of the injection valves is calculated. These data are corrected on the basis of information from the lambda probe and thus the most favorable ratio of fuel and air is formed. There is no need to manually adjust this ratio.
Ignition
The moment of ignition of the mixture is preliminarily adapted to the operating conditions of the engine. Adjustment of the ignition distributor has a significant impact on the operation of the entire ignition and injection system, mainly at the moment of ignition of the mixture. Characteristic curves of the ignition process are embedded in the CU. Knock sensor control ensures that the engine always operates at the optimum ignition timing. This ensures the most favorable fuel consumption.
Idle speed adjustment
The idle speed is adjusted directly by the throttle valve. It is driven by an electric motor. Further stabilization of speed is achieved by adjusting the ignition timing. It follows that the idle speed stabilization is set automatically.
Fuel supply
The electric fuel pump delivers fuel from the tank through the fuel filter to the fuel rail. The fuel supply pressure to the injectors is adjustable. The pressure regulator maintains a constant difference of 0.3 MPa between the air pressure in the suction pipe and the fuel pressure. This ensures that the amount of fuel injected through the injectors is independent of the air pressure in the intake pipe. The amount depends only on the duration of the injection. Unclaimed fuel is diverted through the pressure regulator back to the fuel tank.