Can anyone tell me what fuel injection is/means?

Answer 1

In a non fuel injected engine, the fuel for each cycle of a piston is drawn into the cylinder when the piston goes down (valves open at the appropriate time to allow this).

In a fuel injected engine instead of relying on the vacuum effect to draw the fuel in, the fuel is "injected" into the cylinder at the appropriate time. The whole process is quicker at more efficient than non fuel injected engines.

Answer 2

Under steady state conditions, a well tuned carb is going to perform equally with that of fuel injection. Both are going to supply the engine with the correct amount of fuel. It's the rest of the time (actually most of the time) when fuel injection is superior. Not so much the method of delivery, but more so the sensors and electronic devices that control how much fuel is delivered. Sensors monitor the engine temperature, outside air temp, amount of air flowing into the engine, the position of the throttle and so on. Keeping the fuel and air ratio within the correct (and narrow) range is most important; too much fuel and the engine won't run and too little and it won't run. Fuel injection improves drivability and usually fuel mileage, but the REAL reason it's under the hood is for emmission control plain and simple. In the US, fuel injection was orginally developed for race cars (by Bendix in the 50's) not for power, but because the centrifugal forces of going around curves pushed the fuel up onto the side of the carb, leaning out the mixture.

Answer 3

fuel injection atomizes the fuel by forcibly pumping it through a small nozzle under high pressure, while a carburetor relies on the vacuum created by intake airbrushing through it to add the fuel to the airstream.
the fuel injector is only a nozzle and a valve: the power to inject the fuel comes from further back in the fuel supply, from a pump or a pressure container.

Answer 4

fuel injection is the process of injecting fuel directly in to the plenum or the combustion chamber ,,were as the in carburetor engines the fuel is sucked thru the venturies were fuel is mixed in the air under vacuum and into the cylinders

Answer 5

Does away with carburettors - the inlet is fitted with electronically activated jets - as the engine requires fuel the injector fires fuel into the chamber (piston) and this ignites as vapour.

More efficient

Answer 6

The fuel enters the cylinder by means of an injector rather than a inlet valve, it is also under pressure and enters as a fine mist.

Answer 7

google it