Oxygen Sensors in Engines
Contemporary spark-ignited combustion engines utilize the oxygen sensor technology, in addition to another device that is also used to reduce the level of toxins that is emitted from an internal combustion engine; this was known as the catalytic converter.
ECU which is the abbreviation for Engine Control Unit or PCM which is abbreviation for power-train control module is a computer programme for automobile that supervises the timing of the ignition, the amount of fuel and other factors that is essential for an internal combustion engine to operate. It collects data on oxygen concentration and then makes adjustments to the quantity of fuel that is injected into the engine to balance the level of air and fuel.
The purpose of the ECU is to sustain a certain AFR by decrypting the data it collects from the oxygen sensor. The stoichiometry equation which is the computation of components in a chemical reaction is a similar calculation to the AFR that is gained by the use of the oxygen sensors, wherein a concession is established among the fuel economy, the power and the emissions.
Internal combustion engines, especially those that use petrol are apprehensive of three types of emissions contemporary systems: these are; hydrocarbon which is the gas released when the fuel is not burnt totally, this can occur when a piston misfires or the mixture is rich, carbon monoxide which may happen if the mixture is somewhat rich, and NOx also known as Nitrogen oxide which occurs when the fuel mixture contains too much air thus causing the temperature in the combustion chamber to surpass 1300 Kelvin. This is also known as a lean mixture.
It is recommended that regular checks be made on your o2 sensors to gather whether or not they need replacing as a o2 sensor failure could prove to be indirectly expensive, whether the failure of your oxygen sensor is caused by normal wear and tear, the use of certain fuels that contain lead or may be tainted with silicone, the fact is a faulty o2 sensor could eventually cause damage to your vehicles catalytic converter and other damages that may be expensive to repair.
Another recommendation is to not interfere with or adjust the signal of the oxygen sensor that is sent to the ECU as that could cause damages to your automobile and also increase the emissions from your vehicle. You may think that a tweak here and there will give your engine and in turn your car, more power, but that is not necessarily the case. Even though your adjustment may cause the engine to run slightly lean and therefore providing you with a slight increase in power and increasing your fuel economy, you have also increased your nitrogen oxide emissions and the extra power will soon cause misfires which will further cause an immense loss in same power, below your initial power point.
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