Various Components in Simple Carburetor

The different components in simple carburetor are,

i ) Tickler.

Ticklers are the devices are used for flooding of the carburetor while starting an engine. More fuel would be provided by depressing the tickles which would depress the float.

ii ) Choke.

A choke is a simple butterfly valve ( i . e same as throttle valve) fitted at the top of the air horn.

It may be operated by hand or it may be automatic. During starting, the choke is kept closed in order to provide a rich mixture so that very small quantity of air passes through it. The suction applied to the nozzle is quite sufficient to deliver a large percentage of fuel. In order to open the choke Immediately after the start of the engine, any of the following two methods are employed.

a) Choke is fitted eccentrically. When the engine starts , the air force on the two side of the choke spindle are unequal. It produces turning moment to open the choke.

b) A strangler valve is fitted on the choke. When the engine is started , the stranger is opened against spring pressure by the air pressure which pressure which forces to allow entry of air in the carburetor.

iii) Adjustable area jet :

In this arrangement, a long tapered needle is screwed into the jet. During starting, the screw is loosened so that the area of the jet is increased to provide increased fuel.

iv) Separate air passage :

A separate air passage is provided just below the throttle valve. During starting, throttling valve is kept closed and the auxiliary passage allows the flow of air and the fuel goes through it because whole of suction is now applied to it resulting in rich mixture.

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