Create a UML State Machine Diagram for the following description of an Engine Control Unit: The ECU generally starts in the state “off.” Once the engine is started, the engine control unit powers up as well. While the ECU is fully powered up, it is usually in idle mode, delivering the minimally necessary fuel with a lean air/fuel mixture to the engine, and igniting appropriately. As soon as the driver presses the gas pedal, the ECU calculates the necessary torque. To do so, it first checks the new gas pedal position, then as long as the gas pedal position remains the same, calculates the necessary air and fuel supply as well as the ignition point. As soon as these values are computed, the ECU does three things simultaneously: it checks if the air and fuel amount currently supplied to the engine is still appropriate. If more or less fuel or air is needed, the ECU will assume the adequate operation mode of “less fuel” or “more air,” etc. The third thing the ECU does is to check if the ignition point is adequate. It adjusts the ignition time to “sooner” or “earlier,” similarly to fuel and air supply. Generally, however, the ECU assumes that the current settings for air amount, fuel amount, and ignition point are adequate. While the ECU is “on,” any operation in any state is immediately canceled as soon as the driver changes the position of the gas pedal. In that case, the ECU starts over by calculating the necessary torque. However, if the driver releases the gas pedal, the ECU continues in idle mode
Create a UML State Machine Diagram for the following description of an Engine Control Unit:
The ECU generally starts in the state “off.” Once the engine is started, the engine control unit powers up as well. While the ECU is fully powered up, it is usually in idle mode, delivering the minimally necessary fuel with a lean air/fuel mixture to the engine, and igniting appropriately. As soon as the driver presses the gas pedal, the ECU calculates the necessary torque. To do so, it first checks the new gas pedal position, then as long as the gas pedal position remains the same, calculates the necessary air and fuel supply as well as the ignition point. As soon as these values are computed, the ECU does three things simultaneously: it checks if the air and fuel amount currently supplied to the engine is still appropriate. If more or less fuel or air is needed, the ECU will assume the adequate operation mode of “less fuel” or “more air,” etc. The third thing the ECU does is to check if the ignition point is adequate. It adjusts the ignition time to “sooner” or “earlier,” similarly to fuel and air supply. Generally, however, the ECU assumes that the current settings for air amount, fuel amount, and ignition point are adequate.
While the ECU is “on,” any operation in any state is immediately canceled as soon as the driver changes the position of the gas pedal. In that case, the ECU starts over by calculating the necessary torque. However, if the driver releases the gas pedal, the ECU continues in idle mode.
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