Carburetor

 

 Carburetor introduction

carburetter  is a device that blends air and fuel for an internal combustion. It is sometimes colloquially shortened to carb in North America or carby in Australia.^[1] To carburate or carburet (and thus carburation or carburetion, respectively) is to blend the air and fuel or to equip (an engine) with a carburetor for that purpose.
Carburetors have largely been supplanted in the automotive industry by fuel injection. They are still common on small engines for lawn mowers, rototillers, and other equipment.



 How does carburetor works ?

Engines are mechanical things, but they're chemical things too: they're designed around a chemical reaction called combustion: when you burn fuel in air, you release heat energy and produce carbon dioxide and water as waste products. To burn fuel efficiently, you have to use plenty of air. That applies just as much to a car engine as to a candle, an outdoor campfire, or a coal or wood fire in someone's home.
Photo: A candle mixes wax fuel with air from its surroundings. With too little air, the flame goes out; with too much, the flame will roar and burn blue. A car engine burns fuel in a similar way. Getting its air supply just right is more tricky—and more critical.
With a campfire, you never really have to worry about having too much or too little air. With fires burning indoors, air is in shorter supply and far more important. Having too little oxygen will cause an indoor fire (or even a fuel-burning device like a gas central-heating furnace (boiler)) to produce dangerous air pollution, including toxic carbon monoxide gas. With a car engine, having too much air is just as bad as having too little. Too much air and not enough fuel means an engine burns "lean," while having too much fuel and not enough air is called burning "rich"; both are bad for the engine in different ways.