POPULAR BUT WRONG
On ‘popular but wrong’, I will be bringing you a few popular opinions on car tech with explanations why they are wrong.Catalytic converter
|Cat with sensors|
There is a popular believe and claim that the Cat/Indomie improves fuel economy, I.e. reduces fuel economy. I say a big Wrong to that. The Cat is not designed to, and so doesn't improve fuel consumption. The Cat is designed to remove poisonous gases and elements like Carbon monoxide and Nitrogen from the exhaust gas. Thus, its main function is to reduce excessive air pollution. It does this by reacting with the gas as it passes through the exhaust pipe. Or more specifically, it facilitates the
There is something else in the exhaust system which functions to measure the composition of gasses passing out the exhaust pipe. It is simply called the sensor (or a variation of that). It sends the data to the on-board computer or ECU which in turn adjusts the air-fuel ratio for optimal combustion. So the sensor(s) directly contribute to fuel economy. It is fitted after the exhaust manifold and before the Cat. Some cars do have a secondary sensor placed after the Cat which also feeds the ECU its data. But this second sensor doesn't determine the fuel economy of the car, it measure the amount of carbon emission per mile or kilometer for that cars as it is expected that the Cat would have cleaned up the gas as much as it can before it reaches the second sensor.
|How Cat works|
Just to add, the Cat can be removed without touching the sensor (I've not heard of an otherwise assembly). This is one of the things that happens in car upgrade workshops were stock cars are upgraded for higher performance. The cat is entirely removed, at the expense of environmental pollution because it is a major obstruction in the exhaust system and any obstruction in the exhaust system reduces engine performance. So if the cat has anything to do with fuel consumption at all, I will say it increases fuel consumption by a small bit as the car has to do more work to push out its own gas… You know how much work you have to do when you are sitting on a comfy couch and you have to push out your own exhaust gas compared to when you are standing freely and you just let it out?
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