4. Slow speed
Slow idle speed fuel system and
main fuel system supply mixed gas at the
same time, when one part of uprising
stopper brings along oil needle up and
produce negative pressure on main nozzle
hole, then absorb out mixed gas. Mixed
gas becomes more and more and supply
engine
5. Middle speed （
（（
（ economic
exhaust speed）
））
）
Along with acceleration, mixed gas
is only supplied through main fuel
system, in this process, idle speed oil
system does not supply mixed gas for
there is negative pressure distributed on
throat tube. Firstly, air flows across air
jet (copper canal) and atomizes with
fuel in foam tube, then is atomized for
another time in throat tube. At
economic exhaust speed, air is most
and consume is lest.
6. High speed
Accerelate it until stopper rises up
completely, engine rotates at high
speed, which drives velocity of air flow
in throat tube and froms great negative
pressure in main nozzle hole, and more
mixed gas is absorbed out.
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