US2163522A - Fuel evaporating device for internal combustion engines - Google Patents

Description

FUEL EVAPORA'IING DEVICE FOR INTERNAL COMBUSTION ENGINES R. WEHINGER June 20, 1939.

Filed March 24, 1937 Patented June 20, 1939 UNITE SETES FUEL EVAPORATING DEVICE FOR INTERNAL CUMBUSTION ENGINES Robert Wehinger, Nofels-Feldkirch, Vorarlberg, Austria Application March 24, 1937, Serial No. 132,880 in Austria March 28, 1936 1 Claims.

The known fuel evaporating devices for internal combustion engines use movable especially rotating parts for avoiding the formation of drops using heavy oils. The arrangement of the parts of these devices is arbitrary relating to space and therefore very long conduits are necessary. The mounting, adjustment and survey of these known devices is very expensive and disturbant.

The new device avoids rotating bodies and a separation of the parts from one another. Following the invention this is realized by uniting the entering chamber, the heating chamber and the mixing chamber in a single casing.

By way of example a devi e is illustrated in the drawing. Fig. 1 is a longitudinal sectional view; Figs. 2 and 3 are sectional views following the lines I1 and 11-11 of Fig. The evaporating device i consists of a rigid casing 3 closed on all sides, being connected with a device 2 for supplying fresh air. This casing is divided in three chambers i, 5, 5 (see Fig. 3). The entering chamber 4 and the mixing chamber 5 are connected together by tubes 2, provided in a considerable number in the heating chamher 5; these tubes are suitable mounted in rows displaced to one another. Preferably these tubes are jointed to a unity being arranged easily demountable in the casing, to enable a periodic cleaning of the tubes. For this purpose one side of the casing is detachable arranged by means of a plate 25 and screws or like. The heating chamber (3 is connected to the exhaust; preferably two exhaust pipes 8 are arranged in a manner that the openings are situated opposite and the hot burnt gases flow in the heating chamber 6 in a counter-current approximately perpendicular to the length of the tubes i (see arrows 9). Therefore a very great portion of each tube will be heatedat the same time. The gases are carried off to the exhaust by a tube it in the direction of the arrow 9, the opening of this tube preferably being arranged approximately perpendicular to the length of the tubes 7 and in a manner that the gases enter and leave the heating chamber 6 in nearly directions perpendicular to each other. The atomized fuel enters to the entering chamber 4 by way of the tube ii and first of all strikes against the hot plate 26, which effects the beginning of evaporating the atomized fuel. Following the direction of the arrows l2 the atomized fuel enters the hot tubes 7, where the evaporation is finished. The evaporated fuel leaves the tubes 1 following the arrows l3 and enters the mixing chamber 5. A tube i4 unites this chamber 5 with the suction tube of the engine. The conduit is for supplying the device with fresh air also is united with the mixing chamber 5. A throttle l6 influences the quantity of fresh air entering the mixing chamber 5. A device 2 preferably attached to the evaporating device i is arranged for moistening and cleaning the fresh air. In the drawing a device of this known manner consisting of a water box ii and a suction pipe i8 is illustrated. A netlike plate is or like may be arranged to prevent the water flying off during shocks or like. The air. way is demonstrated by the arrows 2i Regulating devices 2 i, 22, 33 of well known manner may be arranged. For the purpose described a little part of the cooling water of the engine may be used by way of a conduit 24. The fresh air is heated in the same manner as the fuel atomized.

Having now described my invention I claim:

' l. A fuel evaporating device comprising a unitary casing, partitions dividing said casing into an entering chamber, a heating chamber and. a mixing chamber, respectively, and means to cause hot exhaust gases to flow into the heating chamber in a counter current approximately perpendicular to the direction of flow of fuel from the entering chamber to the mixing chamber, said partitions including a hot plate lying normal to the inflow direction of the fuel against which the fuel impinges before passing from the entering chamber to the mixing chamber.

2. A fuel evaporating device consisting of an entering chamber, a heating chamber and a mixing chamber, these chambers being united together as a sole rigid casing, means in said casing for passing the fuel from the entering chamber through the heating chamber to the mixing chamber, exhaust pipes joined to said casing to deliver hot gases to the heating chamber, means to deliver fresh air into the mixing chamber, means to conduct the mixture from the mixing chamber, and a detachable cover plate secured over an opening in said casing for purposes described.

3. A fuel evaporating device consisting of an entering chamber, a heating chamber and a mixing chamber, these chambers being united together as a sole rigid casing, a plurality of fuel conducting tubes passing through the heating chamber to conduct the fuel from the entering chamber to the mixing chamber, means to admit fresh air into the mixing chamber, means to admit hot exhaust gases to the heating chamber and to pass the same from the heating chamber, the hot gases flowing through the heating chamher in a direction perpendicular relative to the length of the tubes for the purpose of heating tubes approximately over their full length, means to pass fuel into the entering chamber, and means to pass the mixture from the mixing chamber.

4. A fuel vaporizing device comprising a single casing divided by partitions into three chambers, namely, a fuel entering chamber at the bottom and one side of the casing, a mixing chamber at the opposite side of the casing and a heating chamber between the other two chambers, means to admit hot gases sidewise into said heating chamber, means to pass hot gases from and through the top of said heating chamber, means to admit fuel into the said entering chamber at the bottom, means to convey the fuel from the entering chamber at the side of the casing horizontally through the heating chamber to the mixing chamber in a direction at right angles to the direction at which the hot gases are admitted and out of contact with such hot gases, and means to pass the mixture from the mixing chamber.

5. A fuel evaporating device consisting of an entering chamber, a heating chamber and a mixing chamber, these chambers being united together as a sole rigid casing, a plurality of fuel conducting tubes passing through the heating chamber to conduct the fuel from the entering chamber to the mixing chamber, means to admit fresh air into the mixing chamber, means to admit hot exhaust gases to the heating chamber and to pass the same from the heating chamber, the hot gases flowing through the heating chamber in a direction perpendicular relative to the length of the tubes for the purpose of heating the tubes approximately over their full length, means to pass fuel into the entering chamber, and means to pass the mixture from the mixing chamber, said means to admit hot exhaust gases comprising two pipes connected to opposite sides of the casing to deliver the hot gases to the heating chamber in opposed currents.

6. A fuel evaporating device consisting of an entering chamber, a heating chamber and a mixing chamber, these chambers being united together as a sole rigid casing, a plurality of fuel conducting tubes passing through the heating chamber to conduct the fuel from the entering chamber to the mixing chamber, means to admit fresh air into the mixing chamber, means to admit hot exhaust gases to the heating chamber and to pass the same from the heating chamber, the hot gases flowing through the heating chamber in a direction perpendicular relative to the length of the tubes for the purpose of heating the tubes approximately over their full length, means to pass fuel into the entering chamber, and means to pass the mixture from the mixing chamber, said means to admit hot exhaust gases being so positioned as to deliver the gases perpendicularly to the direction in which the fuel is admitted to the entering chamber.

'7. A fuel evaporating device consisting of an entering chamber, a heating chamber and a mixing chamber, these chambers being united together as a sole rigid casing, a plurality of fuel conducting tubes passing through the heating chamber to conduct the fuel from the entering chamber to the mixing chamber, means to admit fresh air into the mixing chamber, means to admit hot exhaust gases to the heating chamber and to pass the same from the heating chamber, the hot gases flowing through the heating chamber in a direction perpendicular relative to the length of the tubes for the purpose of heating the tubes approximately over their full length, means to pass fuel into the entering chamber, means to pass the mixture from the mixing chamber, and a plate positioned approximately perpendicular to the direction in which the fuel enters the device and positioned so as to be heated by the hot gases in the heating chamber by means of which plate the incoming fuel is partly vaporized, vaporizing of the fuel being completed in said tubes.

ROBERT WEHINGER.

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