GB119508A - Improvements in Carburetters for Internal Combustion Engines. - Google Patents

Abstract

119,508. Fagard, J. Sept. 29, 1917. Spray carburcttors.-In carburettors such as described in Specifications 103,627 and 105,309. comprising a main nozzle fed from the float chamber, and an auxiliarv nozzle fed from a chamber or well open to the atmosphere and supplied from the float chamber preferably through an upstanding tube or passage, the aperture through which the well or chamber communicates with the atmosphere is of restricted dimensions and may be controlled. This ensures that, at high speed, a vacuum will be produced in the well or chamber sufficient to produce a flow of fuel thereinto and bring the auxiliary nozzle, which is usually employed for accelerating, into action again to maintain the mixture strength. The auxiliary nozzle g may surround the main nozzle a, or may enter the mixing chamber at right-angles thereto. The aperture may be controlled either manually or by a barometric device. The vertical tube is shown at e and the well at d. To ensure that the chamber d becomes emptied, and the nozzle g goes out of action at medium speeds, a restriction may be placed in the passage c between the float chamber and well or, for the same purpose, the top of the tube e may be above the normal fuel level. According to the Provisional Specification, the well or chamber may communicate with the induction pipe, and the main nozzle may be supplied therefrom.