|
Just pretend your engine is a big vacuum. The throttle is just a butterfly valve that opens to allow more air through the big vacuum. If you close the valve you'll get more vacuum, if you open it you get alot less vacuum.
Your engine is sucking air in like a vacuum. The more air it gets means more fuel. Idealy you want to use as little fuel as possible. A quick way to measure it is how much air goes in is proportional to the fuel.
If the air flow is restricted, less air, we get a greater vacuum, but its its WOT, more air, we get very little vacuum. So in the first case you use less fuel and the second you use more.
How much vacuum you have means howmuch fuel your not using. More vacuum less fuel, less vacuum more fuel.
|