New answers tagged fuel-injection
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.
http://thedodgegarage.com/turbo_pfi.html The 84-95 Dodge FWD cars (2.2/2.5/3.0) use a speed density system. The MAP MAP sensor is the primary sensor in determining how much fuel the engine needs. This is the second most important sensor to the ECU after the distributor's HEP(Hall Effect Pickup) sensor. Basically, the engine can flow a given amount of ...
I suspect the reason is for vehicles which operate "fly-by-wire" throttle pedals. Without a TPS, you'd have no idea how much throttle angle the drivers foot was asking for so the engine wouldn't know how far to open it's throttle flap.
While these two sensors are related to how the engine runs, their function and what they provide for engine management are completely different. MAP (or Manifold Absolute Pressure sensor) The MAP provides the computer with information as far as the density of the air. This tells the engine how much air is actually getting into the engine. This, along with ...
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