Choose Your Emission Control Help Topic Below
Evaporative Emission Control System (EVAP) – Function – Failure
Automotive Emission Control Systems – Must Perform One Important Job
Emission Thermactor Plugs – Needed For Small Block Ford Cylinder Heads
Catalytic Converter – Knowing The Basics And Testing
Air Injection – Secondary Air Injection System – Types – Function – Failure
(EGR) Valve – Is The Problem Your (EGR) Valve Or Is It Something Else
(PCV) System – The Most Critical Part Is The Flow Control Valve
Oxygen Sensors (O2) – They Monitor The Levels Of Fuel Mixture
Check Engine Light (CEL) – What Can Cause It To Come On
Loose Gas Cap – Evaporative Emission Control System (EVAP) Self Test
Emission Control
Three Ways To Control Automotive Emissions:
- Promote more complete combustion; so that there are less by products.
- Reintroduce excessive hydrocarbons; back into the engine for combustion.
- Provide an additional area; for oxidation or combustion to occur.
Oxygen Sensor
So, The oxygen sensor measures; the fuel content of the exhaust stream. It would then send a signal; to a microprocessor for analyzing. Consequently, operating a fuel mixture; or air mixture device. As a result, creating the proper air/fuel ratio.
The computer is also capable of; monitoring and diagnosing itself. So, If there is a fault; the computer will light the (MIL). The computer will; record the fault in it’s memory.
Catalytic Converter
So, The catalytic converter looks like a muffler. Also, It is located in the exhaust system. Inside the converter are; pellets or a honeycomb; made of platinum or palladium. So, The platinum or palladium is used as a catalyst.
As a result, all fuels designed for automobile engines are now unleaded.
So, As the converter works to clean the exhaust; it develops heat. Also, The dirtier the exhaust; the harder the converter works. And, the more heat that is developed. Also, In some cases the converter can be seen; to glow from excessive heat. As a result, If the converter works this hard to clean a dirty exhaust; it will destroy itself. As a result, leaded fuel will put a coating on the platinum; rendering it ineffective.
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