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Emission Control – Pollution Control Devices That Manage Emissions
So, The clean air limits the amount of each of these pollutants that could be emitted from an automobile. Consequently, The manufacturers answer was the addition of certain pollution control devices. Also, The creation of a self adjusting engine.
So, An oxygen sensor was installed in the exhaust system. Consequently, Measuring the fuel content of the exhaust stream. It then would send a signal to a microprocessor which would analyze the readings. As a result, To operate a fuel mixture or air mixture device to create the proper air/fuel ratio. As computer systems progressed, they were able to adjust ignition spark timing as well as operate the other emission controls.
The computer is also capable of monitoring and diagnosing itself. As a result, If a fault is seen, the computer will alert you by illuminating a malfunction indicator lamp. The computer will at the same time record the fault in it’s memory. So, that a technician can at a later date retrieve that fault in the form of a code. Finally, Which will help them determine the proper repair.
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