The system has a three-way catalytic converter protection function. The three-way catalytic converter protection first needs to fill in the actual measured catalyst temperature of the vehicle on the hub into the calibration according to the working conditions, as the estimated temperature of the catalytic converter when the vehicle is running. The ECM software estimates the temperature of the three-way catalytic converter according to the operating conditions of the engine. When the estimated temperature is higher than the temperature that the three-way catalytic converter can withstand for a long time, the EFI system will cool down by enriching the air-fuel ratio to reach the catalytic converter. Purpose of protection
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