Patent ID: 6283460
Filing Date: 2001-09-04
Classification: F02M,Y10S

Abstract:
A fuel-air mixture apparatus comprising:(a) a primary air passage having an inlet, an adjustable throttle for controlling air flow in said primary air passage and an outlet;(b) a secondary air passage having an inlet and an outlet to said primary air passage between its adjustable throttle and its outlet;(c) a nozzle having an orifice opening into said secondary air passage for introducing a flow of fuel therein;(d) a needle arranged coaxially of said nozzle with its small diameter end at least normally extending from said orifice into said secondary air passage, said needle being axially movable to provide variability of said orifice of said nozzle and control of said fuel flow through said nozzle; and(e) a linkage or control device for directly linking or controlling the position of said needle to the position of said adjustable throttle in said primary air passage for adjustment of said orifice of said nozzle;the arrangement being such that in use the fuel flow from said nozzle is matched to the position of said adjustable throttle and the fuel flowing from said orifice towards said small diameter end of said needle mixes with the air flowing through said secondary passage prior to mixing with the air flowing in said primary air passage.