FUEL INJECTION

Fuel Injection,

It has become the primary fuel delivery system used in motorcycle engines, having

replaced  during the 1980s and 1990s. A variety

of injection systems have existed since the earliest usage of the internal

combustion engine.

The primary difference between carburetors and fuel

injection is that fuel injection atomizes the fuel by forcibly pumping it

through a small nozzle under high pressure, while a carburetor relies on suction created by intake air accelerated

through a tube to draw the fuel

into the air stream.

Modern fuel injection systems are designed

specifically for the type of fuel being used. Some systems are designed for

multiple grades of fuel (using sensors to adapt the tuning for the fuel

currently used). Most fuel injection systems are for gasoline or diesel applications.

Objectives

The functional objectives for fuel injection

systems can vary. All share the central task of supplying fuel to the

combustion process, but it is a design decision how a particular system is

optimized.

The modern digital electronic

fuel injection system is more capable at optimizing these competing objectives

consistently than earlier fuel delivery systems (such as carburetors).

Carburetors have the potential to atomize fuel better.

Benefits

Driver benefits

Operational benefits to the driver of a fuel-injected car

include smoother and more dependable engine response during quick throttle transitions, easier and more

dependable engine starting, better operation at extremely high or low ambient

temperatures, smoother engine idle and running, increased maintenance

intervals, and increased fuel efficiency. On a more basic level, fuel injection

does away with the choke, which

on carburetor-equipped motorcycles must be operated when starting the engine

from cold and then adjusted as the engine warms up.

Environmental benefits

Fuel injection

generally increases engine fuel efficiency. With the improved cylinder-to-cylinder fuel distribution of multi-point fuel injection, less fuel

is needed for the same power output