Carburetor working principle
1. Inlet oil road
Fuel flows into floater chamber of
carburetor for its own weight, which
communicates with atmosphere for
balance tube of carburetor that guarantees
pressure in floater chamber is the same as
atmosphereic pressure. Floater goes up
along with oil level, when oil level raise
certain high, the floater drives needle
valve to shut off inlet oil path.，which may
avoid that fuel overflows from carburetor.
In reverse, when fuel goes down, floater
drives needle valve to go down, needle
valve opens, and then fuel is supplied into
floater chamber of carburetor.
2. Condensing oil road
When engine starts, electronic valve
(electric condense valve) open, one part
of fuel passes through condensing nozzle
hole and goes into throat tube, for this
mixed gas becomes thick and reaches
flammable. After starting, electric
condensing valve oil needle extends
gradually until condensing path is shut
off, here engine performs in economic
mixture gas.
3. Idle speed
After engine starts, slowly condensing path is
shut off, mixed gas becomes thin (the ratio of air
to fuel becomes big), fuel flows through idle jet,
then transition hole, finally is imbibed into throat
tube. Other part of fuel passes through mixture
ratio little hole, then is imbibed into throat tube,
the thickness of this part of fuel can be adjusted
through miture ratio screw.
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