Ok how does an intake work?

(2012-02-04 15:20:08) 1. Zack Says: Actually i know how it works lol but i dont get how AIR & FUEL MIX in together how does that work?2. civicmagnet Says: Think of your engine as a pump. it pumps exhaust out and sucks air/fuel in.
Your starter enables you engine to turn over a few cycles, sucking in the air/fuel then combusting and pushing out the spent gases until the engine reaches a speed, usually close to its idle speed, where it can self sustain and keep running without the help of the starter. this is when the combustion process takes over in running the engine. the engine is combusting the air fuel mixture. the air part of the mixture is simple, your throttle blade opens and air (you engine is a pump remember) is sucked past the throttle blade into the intake and down into the cylinder. the piston dropping in the cylinder creating a vacuum pulls the air in. but you need fuel to combust in the cylinder too. at the same time as the air being pulled into the engine you need to introduce fuel into that air. accomplished correctly that fuel will be a fine mist, like what comes from an aerosol can. it mixes with the air being sucked down into the cylinder by the vacuum (pull) created by the downward moving piston. now it will stay there until the piston starts to move back upwards. the piston continues upwards compressing the mixture of air and mist like gasoline until it reaches about the top of its range of travel. a spark plug fires its spark and ignites the mixture. the explosion forces the piston down. that in turn creates a forced rotation of the crankshaft and transmission, driveshaft, and on to eventually the wheels.3. Andy Says: The turbulence in the manifold and the carb venturi help atomize the fuel into small droplets.Then it swirls around and mixes on it way to the cylinders.One reason fuel injected cars(especially direct injection) are more efficient is that the injectors help atomize the fuel into smaller droplets than a carb does4. formulafire83 Says: Air goes into the intake and mixes with atomized fuel from the injectors inside the combustion chamber, if you are talking about a fuel injected car. Older carbureted cars mix fuel in the carburetor before it gets to the combustion chamber.5. T D Says: Fuel injected cars use fuel injectors which open and close to spray a fuel mist into the air stream.

Carbureted cars use metering jets that flow fuel onto the intake manifold floor where it evaporates and mixes with air Tag: Ok how does an intake work?