KEEWAY ATV250 - The Process of Oil Entering; The Process of Gas Increase Its Concentration

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1、
、、
、The process of oil entering
The fuel oil flows into the float room of
carburetor from fuel tank depend on
one's own gravity.The float room
communicates with the atmosphere by
balance pipe of carburetor ,in order to
guarantee that the pressure in the float
room is the same as pressure of the
atmosphere.The float rises with the
rising of oil surface. When the oil
surface rised to the suitable height ,the
float drives a needle valve to close the
channels of oil entering,in order to
avoid that the fuel oil overflow the
carburetor. On the contrary, when the oil
surface dropped due to the fuel oil have
been consumed, the float drives a needle
valves to drop, then the needle valve is
opened, the fuel oil enters into float
room of carburetor.
2 、
、、
、 The process of gas increase its
concentration
Electric air-door will keep open when
engine start, some fuel oil will enter into
throat pipe through thicken orifice, it
can make concentration of mixed air
bigger and then start the engine easily.
The oil needle will extend to close the
channels of oil concentrating, then the
engine can run normally when the
concentration of mixed gas is economic.