Basic Electronic Control Unit Function:
The first stage of ECU (Electronic Control Unit) operation is after all power management. This is often where various voltages are regulated and also the power-up of the ECU is handled. Most ECUs have sophisticated power management because of the range of components inside, accurately regulating 1.8V, 2.6V, 3.3V, 5V, 30V, and up to 250V all from the car’s 10-15V supply. The facility management system also allows the ECU to own full control over when it powers itself down – i.e. not necessarily once you put off the electric switch.
Once the proper voltages are supplied, the microprocessors can begin else up. Here the most microprocessor reads software from the memory and performs a self-check. It then reads data from the various sensors on the engine and converts them into useful information. This information is usually transmitted over the CANbus (Controller Area Network) – your car’s internal electronic network – to other electronic modules.
Once the most microprocessor has interpreted this information, it refers to the numeric tables or formulae within the software and activates outputs PRN.
Example:
Should the Crankshaft Position Sensor show the engine is close to reaching maximum compression on one of all the cylinders, it’ll activate a transistor for the relevant induction coil. The aforementioned formula and tables within the software will cause the activation of this transistor to be delayed or advanced supported throttle position, coolant temperature, air temperature, EGR opening, mixture ratio, and former measurements showing incorrect combustion.
The operation of the most processor inside the ECU and the activation of the many outputs is overseen by a monitoring microprocessor – essentially a second computer that makes sure the master computer is doing everything correctly. If the monitoring microprocessor isn’t pleased with any aspect of the ECU, it has the power to reset the full system or shut it down completely. Read and learn about car Technical FAQ and get in-depth details of the car features.
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