GB190725A - Improvements in or relating to carbureters - Google Patents

Abstract

190,725. Nilsson, A. L. Dec. 24, 1921, [Convention date]. Spray carburettors. -The composition of the mixture is regulated by admitting variable quantities of air to a chamber communicating on the one hand with the top of the Boat chamber and on the other hand with the main air passage of t h e carburettor through a passage in front of the throttle valve, said passage receiving fuel from the nozzle. The nozzle 5, Fig. 1, discharges into passage 6 which communicates through holes 10 in choke tube 2 with the main air passage 1, and with a chamber 7 open to the atmosphere through valve 8 and to the top of the float chamber through duct 9. A slow running nozzle 14 delivers fuel into an air duct 11. The valve 8 controls also the inlet 12, Fig. 4, to duct 11 and also an air duct 13 the function of which is, in a certain position of the valve 8, to supply sufficient air to duct 11 to destroy the vacuum therein and stop the flow of fuel through nozzle 14 thus allowing air only to pass to the engine. The fuel issuing from nozzle 5 is intersected by air through chamber 7<1>, the resulting mixture is intersected by air through channel 6 and this diluted mixture is again intersected by an air current after passing through the holes 10, thus producing efficient atomization of the fuel. In the modification shown in Figs. 5 and 6, the throttle valve 15 is of the rotatable barrel type and carries a wedge shape piece 16 which, in the closing positions of the throttle valve, controls the outlet from the passage 6.