Patent GB-258222-A (GB)
Title: Improvements in or relating to the production of a dry mixture of vapourised fuel and air
IPC: F02M33/06
Filed: 1926-06-02
Abstract: 258,222. Godward, E. R. Sept. 9, 1925, [Convention date]. Vaporizers, external. - A dry gaseous combustible mixture of air and liquid fuel particularly for use in internal-combustion engines is produced by subjecting the wet or mechanical mixture, e.g. from a car-. burettor, to a process which consists in dividing the stream into a series of independent outwardly moving streams, retarding the flow of and expanding these streams by causing them to flow through separate radiating passages which expand from their inlet to their outlet ends uniting the streams in a common collecting chamber and applying heat to the streams. The wet mixture passes through a pipe 13, Fig. 2, to a chamber 4 formed between a cover 2 and a base 3 provided with projections 19 which assist in abstracting heat from hot gases, e.g. exhaust gases, passing through the chamber 5. The mixture inlet comprises a fixed section 8 and a removable section 9 spaced by lugs 11 from the wall 6 of chamber 5 to form a well 10 in which unvaporized fuel may collect. A piece of capillary fabric, e.g. gauze, is held between the sections 8, 9 and extends downwardly into the well at 14 and also projects at 15 beyond the interior surface of the sections. The chamber 4 contains a number of preferably curved plates 22 which form passages 20 terminating at their outer ends in an annular vertical passage 21 which discharges into the upper part of the vaporizing chamber 4 which is in communication with the engine or other part to be supplied, through an outlet passage 29. The plates are spaced apart by projections 24, Fig. 5, projecting alternately from opposite sides of the plates. Some of the plates are formed at their inner ends with an angular extension 23, Figs. 3 and 5, and the alternating plates are made without such an extension and terminate short of the extended plate so that mixture streams entering the spaces 7<1>, Fig. 3, may flow into the narrow expanding passages 20 and there become further subdivided by the shorter plates. The plates are secured by binding hoops 25, they rest on the partition 3, and the spaces between them are closed at the top by a plate 26 secured by screws 28 and provided with a boss 27 which projects into the space formed by the inner edges of the extensions 23. The mixture on entering the vaporizer expands and is divided into a large number of thin streams; the velocity of flow is reduced and this, in conjunction with a centrifugal effect set up by the curved passages, causes a separation of the heavier fuel particles which are thereupon deposited upon the heated plates. These particles, in travelling down the plates, will meet with a gradually-increasing temperature which will have the effect of vaporizing them progressively according to the particular boiling-points of their constituents. Fuel that has not been vaporized in the passages 20, e.g. during starting of an engine, will flow into the wall 10 and will be brought into contact with the mixture stream by the capillary material 14, 15 and ultimately vaporized. The Specification contains statements as to the dimensions of the apparatus. Specification 197,984 is referred to.