Audi Repair & Workshop Manuals
Timed fuel injection systems for gasoline engines inject a measured amount of fuel in timed bursts that are synchronized to the intake strokes of the engine. Much more precise management of the fuel injection event also enables far better control of emissions. Later Closed loop fuel injection systems enhanced the air/fuel mixture handle with an exhaust gas oxygen sensor Despite the fact that not element of the injection handle, a catalytic converter additional reduces exhaust emissions. This was created to meet the U.S. emission specifications with no loss in efficiency and it also reduced fuel consumption. The duration that the injector is open (named the pulse width ) is proportional to the amount of fuel delivered.
The relative proportions of air and fuel vary according to the sort of fuel utilized and the overall performance requirements (i.e. power, fuel economy, or exhaust emissions). Following this racetrack good results, the 1955 …
Audi Repair & Workshop Manuals Read More
The following guide mostly discusses multi-port electronic fuel injection systems due to the fact it is the dominate technique applied in most performance and racing applications. Earlier systems, relying on easier injectors, frequently injected into a sub-chamber shaped to swirl the compressed air and strengthen combustion this was recognized as indirect injection However, this was much less efficient than the now frequent direct injection in which initiation of combustion takes location in a depression (often toroidal ) in the crown of the piston.
An electronic fuel injection (EFI) technique is found in the internal combustion engine and assists in delivering fuel to the cylinders by signifies of air pressure from the pump. Fuel injection systems are also in a position to operate usually regardless of orientation, whereas carburetors with floats are not capable to operate upside down or in zero gravity, such as encountered on airplanes. Often a fuel rail is used to divide the fuel provide into the needed number of cylinders. In the field of diesel electronic injection, the industry is mostly targeted at high pressure widespread rail and passenger automobile dieselization in 2015.