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Upto to which point this air can be reduced. (I mean in the AFR ratio like 10: 1 , 8: 1) ? Realize, if you were to open the butterflies and nothing else were to occur (no additional fuel), you'd be going lean (higher air to fuel ratio ... 16:1, 18:1, and much higher). The computer or carburetor in most vehicles will control the amount of fuel ...


Let me see if I can clear some of this up for you. The stoichiometric ratio (AFR) for the petrol is 14.7 : 1 right? This is correct, and it's important to understand the concept of stoichiometric ratio. It means that when the fuel and air are burned, they must be in this ratio if you want them to combine completely, with nothing left over (well, none of ...


The ratio is typically maintained. About 14:7 for idle, cruise, part throttle, and a bit richer (12-13:1) for WOT . The butterfly valve controls how much air goes into the engine. The carburetor or fuel injection system's job is to match the amount of fuel going into the engine to the amount of air going in.

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