GB740036A - System of carburation of the fuel in internal combustion engines, and carburetters embodying the system - Google Patents

Abstract

740,036. Carburetters. GIANINI, C. March 22. 1954 [April 4, 1953], No. 8325/54. Class 7(3) Fuel is made to flow under pressure in a continuous stream which follows a predetermined circuit such circuit including a source of fuel or reservoir a pump for creating. a fuel pressure and effecting a continous flow of fuel through the circuit a recycling pump for collecting the fuel. and recycling it from the collecting pipe to the reservoir and an injector in proximity with the intake pipe and the injector is associated with mechanical deflecting means which operate in such'a way that the fuel is supplied to the intake pipe in phase with the intake stroke of the engine whereas the fuel passes into the collecting pipe of the circuit during the other phases of the engine. The rate of fuel flow may vary directly as the engine speed and as the, density of air in the intake pipe of the cylinder. In Fig.. 1, fuel under pressure is supplied through an inlet pipe 14 and when a control member 17 is in the position shown fuel passes into the intake pipe 1 through a port 4. The control member is operated in phase with the engine by means of members which operates the engine timing gears or by a camshaft and when it is shafted to the right the fuel passes into a pipe 16 and is returned by a pump to the reservoir. In modifications the fuel is supplied through a fixed nozzle and a sliding valve control whether is passes into the intake or is returned to the reservoir. In Fig. 5 the fuel nozzle 6a is fixed and a rotary valve 20 controls the intake whether the fuel passes into or is returned to the reservoir. Ports or passages may be provided in the hollow bodv 20 allowing or causing the passage of fuel into the cavity 22. There may be two ports 21 in the valve 20 spaced apart by 180 degrees. The engine may have four or six cylinders arranged side by 'side the hollow body 20 engaging all the intake pipes; The nozzle 6a will have an opening 8 for every intake pipe. It is stated that the nozzle 6a may rotate as well as the_ valve 20. In Fig. 7. when a member 26 - is opposite the fuelnozzle 6c the fuel is deflected into the intake. The nozzle aperture may be of round vent or eliptical shape or a set of aligned holes may be used. The. fuel may flow from the nozzle in the shape of cylindrical or lamina shaped jets. The nozzle may be of polygonal section. Both the nozzle and the member which deflects the fuel stream may move, all the cylinders may be fed separately or a single device can be used for feeding two cylinders, three devices being used for six cylinders. There may be mechanical control of both the forward and backward stroke of the injector. Fuel control may be effected by means of a pump with vanes or gears which has one outlet aperture or a plurality of parallel outlet apertures . to the feeding pipe of the injectors, the area of the outlet aperture or apertures being variable by means of a suitable control device which works according to the density of the intake air (manometric device). It can also work according to the position of the throttle (cone shaped needle operated by the throttle or throttles). If a constant pressure pump is used the pressure of the fuel is controlled also according to engine revolutions such as by a centrifugal regulator.