Patent GB-153564-A (GB)
Title: Improvements in or relating to carburetting-apparatus for internal combustion engines
IPC: F02M21/00
Filed: 1920-08-20
Abstract: 153,564. Good Inventions Co., (Assignees of Good, J.). Nov. 6,1919, [Convention date]. Vaporizers, external.-The charge supplied to an engine is produced by igniting a mixture of fuel and air in controlled proportions without explosive combustion, commingling it with another mixture of fuel and air, and delivering the resultant mixture to the engine. The ignited mixture may be completely or incompletely burnt, may be supplied during all or part of the normal running, and may be supplied alone at starting. The flame may be allowed to project into the second mixture, which may be of normal composition or may contain an excess of air or fuel. Several forms of apparatus for producing the charge are described. As shown in Fig. 1, the exhaust-heated inlet manifold 1 is connected to a suction-actuated combustion-device 3 and also to a carburettor 4, a rotary valve 5 serving to connect either one or both devices with the intake. The combustion-device 3 comprises a Venturi tube 9 to the throat of which fuel from the carburettor float chamber 13 is supplied by a pipe 12, and an air passage 10 controlled by a valve 11, the mixture being ignited by a spark from the magneto 14. In the form shown in Fig. 3, the fuel supplied to the combustion-device is aspirated from a nozzle 117 by a jet of air induced through a nozzle 26 by the engine suction; additional air to support combustion enters through holes 27, the whole air supply being controlled by a valve 25. The ignited mixture is drawn through the space 28 surrounding the carburettor passage and mixes with the mixture therefrom at 29. The throttle valve 35 may be interconnected with the air-control valve 25. In a modification, the air supply to the nozzle 26 is uncontrolled, and the air to support combustion enters laterally from a valve-controlled inlet through holes in the wall of a ribbed mixing-chamber. In a further modification, aerated fuel is supplied to the combustiondevice 43, Fig. 5, by a nozzle 45 provided with air inlets 46 and a fuel inlet controlled by a needle valve 47, and is mixed with additional air induced through a suction-actuated valve 44 and hcles 42. The ignited mixture passes to the carburettor mixture through an outlet 41 which may be fitted with an apertured sleeve 49. An adjustable disk throttle may be provided at the outlet of the chamber 43 so that the flame is extinguished by the velocity of the mixture past the disk. The fuel may be supplied to the nozzle 43 through a pipe 51 dipping into a reservoir 52 fed from the float chamber 50 through a pipe 53 restricted by a screw 54. Fuel accumulates in the reservoir 52, and provides a rich mixture for starting. In other modifications, the ignited mixture is added to the carburettor mixture (1) through a non-adjustable slit in the wall of the Venturi tube above the carburettor nozzle, (2) through an adjustable slit at the throat of a Venturi-shaped portion of the intake pipe above the carburettor throttle, (3) through perforations in an elbow portion of the intake pipe below the carburettor throttle. Specifications 156,175 and 156,176 are referred to. Reference has been directed by the Comptroller to Specification 150,975.