Patent GB-849269-A (GB)
Title: Improvements in or relating to carburettors
IPC: F02M1/00
Filed: 1957-01-22
Abstract: 849,269. Carburetters. SEBAC NOUVELLE S.A. Jan. 22, 1957 [Jan. 23, 1956], No. 2334/57. Class 7(3). A carburetter comprises in combination a conduit having a front end adapted to receive a current of air and to be connected to an air filter and a back end adapted to communicate with the intake port of a cylinder of the engine to be fed, at least one blade unit disposed between walls in the conduit the blade being formed with a central apertured portion, the aperture thereof being substantially triangular in shape and the apex of the substantially triangular aperture being directed to the leading edge of the blade and at least one channel opening into the apertured portion in the blade, the channel being adapted to communicate with a source of carburent and means for limiting the flow of air through the conduit. In Figs. 1, 2 and 4 the upstream end 2 of the rectangular cross-sectioned conduit 1 is attached by means of a flange 3 to an air filter (not shown) or to an auxiliary pipe between it and the air filter when one air filter is used for several carburetters. The downstream portion 4 is attached by a flange 5 to the cylinder when one carburetter per cylinder is used or to the suction pipe communicating with the intake orifice of the cylinder or the intake orifices of several cylinders. Preferably the carburetter supplies not more than 2 cylinders. Each channel 11 communicates with an orifice 12. The orifices 12 are connected to one or two constant level fuel reservoirs or tanks (not shown) two tanks being used when two carburents or a single carburent and a non-carburent liquid are used. Two elastic discs or plates of steel are attached to the downstream side of the nozzle member 6. The plates may be separated by variable amounts by means of a cam 18. In the case of an automobile the plates are controlled by the accelerator pedal. The member 6 may be formed from copper or a plastic material. In Fig. 5 the elastic plates are replaced by members 45. The richness of the mixture is regulated by means of corrector or compensator members 47. The nozzle 38 is of aerofoil cross-section. The pipe 32 may be secured directly to one of the intake openings of a cylinder of the engine. In the embodiment of Fig. 10 the triangular cavity in the nozzle extends to the downstream side thereof and an additional aerofoil cross-sectioned member 72 is provided. Only one channel or more than two channels might be provided in the aperture nozzle to bring together the liquid or liquids in the aperture in the nozzle. It is advantageous to provide one carburetter for each cylinder. The two jets of fuel may be petrol or of two fuels, e.g. gas-oil and alcohol. In automobile vehicles, moto-cycles, motor scooters, motor bicycles, autorails, airplanes and electric power generating installations the engine may be supplied not only with petrol but with other fuels used singly or in combination such as gas-oil, benzol, ethyl alcohol or mixtures or petrol and water may be used. The apertured blade and or the other blades may be formed from synthetic resin or copper. Specification 736,210 is referred to.