The Vaporizing Of Paraffin for High-Speed Motors
(Electric Ignition Type)

16 VAPORIZING OF PARAFFIN. By the action of the well l, the increasing suction effect required for a lowering level was diminislied in the pro- portion of the depth of the well to that of the cistern, and with such effect that the auto could be tilted over in either direction, as by road camber or gradient, with- out appreciably affecting the working of the motor; also the effect of difference of levels, as from 6 to in place of requiring some 30 per cent, greater suction effect, was reduced to a 10 per cent, difference; thus the motor could bc run with but little slackening of power or speed for a considerable time, without requiring adjustment of the petrol feed. As a further corrective, the cistern was pro vided with no vent ot her than by a tube, as shown at e, which extended to the bottom of the cistern and thus produced a bird-fountain effect. According to another method (Fig. 7), Griffin’s, a constant level can be obtained by the effect of difference of deflection of a thin corrugated diaphragm, m, to which is connected the feed valve v from an overhead supply as by the duet /; in this manner the diaphragm is caused to rise as the level of the petrol fails, and, being connected with the regulator valve v, thus inereases the opening correspondingly. In another method for maintaining a constant level, shown in Fig. 8, and used in connection with stationary engines of large size, when it is desireel to locate the fuel tank below ground, a pump, p, is used to circulate the liquicl to an overhead cistern pro vided with an overflow, w, the pump capacity being in excess of the maximum amount drawn off through c to the carburettor. This method has the advantage of enabling a large supply of fuel to be kept unaffeeted by temperature variation, and minimizes leakage and evaporation.