CARBURETOR

The device used to produce an explosive mixture from a ~ liquid fuel and air is called a carburetor. Such a device is a nece ary part of any internal combustion engine, using liquid fuel which is volatile at ordinary tem- — per at ures. h: The earlier forms of carburetor were — known as vaporizers; this name however i ee “ does not describe the contrivance adequately, since not only vaporization, but also thorough mixture with a definite quantity of air is nece ary for proper use of the fuel. The usual carburetor consists of a compartment.called a float chamber, in which the liquid fuel is kept at a constant level by means of a float-controlled valve. A small pipe, terminating in one or more nozzles, or jet tubes, leads from this compartment into an adjacent one called the vaporizing chamber. Here, air which may have been previously heated by contact with the exhaust manifold of the engine, is drawn past the nozzles by the aspirating stroke of the piston. The current so created causes the fuel to flow through the nozzles, thus becoming vaporized and thoroughly mixed with air. Both the quantity of air and the quantity of fuel can be directly controlled and the proper functioning of the carburetor depends on these two adjustments. town, on Jiicar, Valencia, Spain; linen and silk manufactured. Pop. 12,800.