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- Carburetor
-
- There are two
- different basic
- designs of
- carburetor:
- Fixed-jet and
- variable jet. They
- can have manual
- chokes to assist in
- cold starts,
- although most
- modern cars have
- automatic chokes.
-
- The operating
- principles for all
- carburetors are the
- same. The
- carburetor mixes
- fuel and air in
- proportion to
- optimize engine
- performance under
- the prevailing
- conditions.
- Variables as
- outside air
- temperature, the
- heat of the engine,
- and engine load
- have to be taken
- into consideration.
-
- When the engine is
- cold, it needs more
- fuel to run. It is
- the function of the
- choke to supply the
- extra fuel and air
- mix, to allow the
- engine to run,
- without hesitating,
- until it reaches
- operating
- temperature.
-
- It is the actual
- motion of the
- pistons in the
- engine that sucks
- the fuel mix into
- the engine. As the
- piston goes down
- after expelling the
- exhaust gases, it
- creates a vacuum,
- the intake valve
- opens, and fuel
- mixture is sucked
- into the cylinder.
-
- Most cars
- manufactured today
- do not have
- carburetors. Fuel
- injection
- mechanisms are more
- precise, causing
- the cars to run
- more efficiently
- and to give off
- fewer emissions.
-
- -end-
-
-