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ECU

ECU evaluates the signals received from the external sensors, and limit their allowable voltage level.
Based on the input data and the characteristics recorded in the memory of the microprocessor, and the ECU calculates the fuel injection timing and converts these parameters into output signals, which are used to control the fuel injectors. In addition, the output signals are also used to control various components and systems such as the drive EGR, control the fuel pump relay, radiator fan, engine pre-heating and air conditioning systems. The actuators are protected against short circuit and open circuit, and any damage recorded in the memory of the microprocessor. Many output signals used by other vehicle systems.

The greatest load on the output stages ECU have fuel injectors. The current output stage generates a solenoidal magnetic field, the injector valve which is applied to a portion of the nozzle with the fuel under high pressure. To ensure accurate injection quantity of fuel injector opening should take place very quickly, which requires a high voltage supply ECU. Control circuit fuel injector has two phases: a discovery phase, characterized by high current consumption and retaining phase, characterized by a low current consumption.

ECU meets the high requirements for:

- The impact of ambient temperature between -40 ... + 85 ?� C;
- Resistance to fuels and lubricants;
- Resistance to moisture;
- Mechanical loads.

ECU also has electromagnetic compatibility (EMC) and has low levels of radiated interference.