Patent GB-445847-A (GB)
Title: An improved method of and apparatus for using fuels in internal combustion engines
IPC: F02M31/093
Filed: 1934-07-18
Abstract: 445,847. Vaporizers; spray carburetters. SCHWARZ, J., 6, P³trichstrasse, Munich, Germany. July 18, 1934, No. 21036. Void [Abridged as open to inspection under Sect. 91 of the Acts, Feb. 9, 1935]. [Class 7 (iii)] Fuels of different densities may be used together or alternatively without alteration of the vaporizer &c., the fuel, preferably emulsified by air, hydrogen or the like, being first completely vaporized in a chamber with exclusion of practically all air and under high vacuum, and then subjected to turbulence and mixed, before admission to the engine, with air in a chamber separate from the atomizer. A heavyfuel tank 2, Fig. 1, and a light fuel tank 3 may be placed by a two-way cock 13 in communication with a main float chamber 4, an auxiliary float chamber 9, for idling and starting, being connected directly to the tank 3. The main float chamber 4, Fig. 2, has the usual float 14 and valve 15 and has a main jet 17 mounted detachably along its axis. Aerating air or gas is admitted through valve 21 and holes 20 and a filtering device of large area is provided at 22 ... 25. Swaying of fuel is prevented by the large part 23 of the filter and by grooves 26 formed in the chamber body. The emulsified fuel leaves by pipe R for a vaporizing coil 5, Fig. 1, connected by a pipe 7 to a mixing chamber 6 in communication with the induction manifold 10, the connection of the float chamber to the coil being of a universal character. The coil 5, Fig. 4, is enclosed in an enlargement of the exhaust pipe 11, Fig. 1, and the convolutions thereof are spaced apart. The cross-section of the space 29 inside the coil and of the annular space 30 is equal to that of the exhaust pipe. The lower part of the space 29 is almost completely closed by a cone 35 and a small gap 37 is left at the top of the coil between a tubular part 36 and the casing. The exhaust gases entering at U are compelled to pass through the convolutions. The vaporized. fuel leaves at S for the mixing chamber which comprises three parts 6<a>, 6b, 6<c>, Fig. 6, and contains a heatinsulated body 38 with funnel top, the vaporized fuel being admitted at N. Cold air enters at 8 controlled by a valve 39 loaded by a weak spring 42 adjustable by a rod 43a, and a throttle valve is provided at 12. Oil vapour from the crank-case and, in some cases, water vapour is admitted at 8. The ribs on the body 38 and on the casing become coated with a film of oil which arrests dust. The air valve 39 is screwed to a rod 40 on the other end of which a vapourcontrol valve 41 is mounted. The chamber behind the air valve is flared preferably parabolically, and the vapour cone is so flared that at its greatest diameter it is larger than the suction conduit. In a modification, Fig. 10 (not shown), a rotatable barrel throttle valve actuated by the driver controls both the air and vapour passages, the air passing through cleaning material. The auxiliary float-chamber 9, Figs. 8, 9, may be attached in any radial direction to the part 6<c>, Fig. 6, and is supplied with fuel at To, the flow being controlled by float 44 and needle 45. A cylindrical chamber 46 beyond the throttle valve communicates with the induction pipe by a bore 47 which conveys mixture for idle running air being admitted at P, and fuel being sucked through a conduit 49. At the bottom of chamber 46 is a rotary valve 51 actuated by a pin 50 from the throttle so that as the latter is opened the rotary valve is closed and the light fuel supply cut off. Parallel with the duct 49 is a starting duct 54, Fig. 9, formed into a chamber 55 provided with a valve 56 loaded by a spring 57, the valve being opened as required by a Bowden wire. Light fuels alone may be used, the main float chamber 4 being then mounted directly on the mixing chamber.