GB105309A - - Google Patents

Abstract

105,309. Fagard, J. Nov. 4, 1916. Spray carburettors.-In carburettors wherein an auxiliary " pick-up " nozzle is situated in the choke-tube and is fed from a well open to the atmosphere, the well is supplied from the float chamber through an upstanding tube the flow of fuel through which is automatically arrested as the suction increases and the main nozzle is brought into action. The main nozzle e is fed from the float chamber through the passage c and is surrounded by the auxiliary nozzle j fed from the bottom of the well a open to the atmosphere through a passage g and tube f and supplied from the float chamber through the upstanding tube b. A pilot nozzle m is also supplied from the well a through a tube n. As the throttle t is opened, the flow of fuel through the nozzle j lowers the level in the well a, and air is ultimately drawn through the tube f, which has the effect of arresting the flow of fuel through the tube b. In a modification, the tubes b, f are formed as a single tube with an orifice corresponding to the lower end of the tube f. In a further modification, the auxiliary nozzle enters the choke-tube at right-angles thereto. A restriction may be placed in the tube b, or in the passage c between the float chamber and tube b.