Abstract:
A carburetor for an Otto cycle engine comprising a mixing compartment through which flows a suction air current regulated by means of a regulating valve. In the mixing compartment there is prepared from the dosed fuel delivered by nozzle means a fuel-air mixture for the Otto cycle engine. Within the mixing compartment there is arranged an impeller driven by the suction air current, this impeller containing a fuel compartment into which opens a fuel delivery channel. The nozzle means embody nozzle channels which lead away from the fuel compartment, these nozzle channels rotating with the impeller and fuel is sprayed from spray nozzles of the nozzle channels during rotation of the impeller owing to an excess pressure brought about by the centrifugal forces, the fuel being sprayed out of the fuel compartment into the mixing compartment.
Abstract:
In a fuel injection valve that includes a valve needle with two axially spaced work faces disposed in two separate pressure chambers and exposed to fuel pressure to unseat said valve, there is provided a throttle channel maintaining continuous communication between the two pressure chambers.
Abstract:
Controlled mixture formation. This invention pertains to the generation of homogenous mixtures having a freely selectable composition and is produced by using a rotary distribution cup driven by its own motor, with metered quantities of fuel being supplied to the pre-chamber of a rotary fuel distribution cup via a feed pipe extending through a metering valve in such a manner that the composition of the mixture produced in each case can be adjusted, irrespective of the amount of the air, over the entire operating range of the internal combustion engine, with the fuel being radially distributed by centrifugal force, very finely divided and mixed with air in a mixing chamber wherein the quantity and composition of the mixture are adjusted by means of the metering valve in conjunction with a control valve in such a way that the production of the mixture and its conveyance take place at approximately ambient pressure, with a motor performance graph establishing the optimum setting for the metering and regulating valves for mixture production at approximately ambient pressure while improving fuel consumption and the exhaust gas quality, with the invention, in connection with the noted control system being especially suitable for the best possible operation of four-stroke engines with lean fuel mixtures at lambda values of at least 1.5.
Abstract:
The annulus (20) around the fuel feed stud (8) which seals the rotor (14) of this central injection device is connected to a stowage compartment (40) for intake air by way of a ball bearing (7). In the case of the impeller (31, 35) driven rotor (14), the stowage air pressure counteracts the leakage fuel pressure in the annulus (20). By .[.adapting.]. .Iadd.adopting .Iaddend.the width of the opening of the stowage compartment (40), the stowage air pressure is adjusted to be equal to or slightly higher than the leakage fuel pressure, so that no fuel can flow out of the annulus (20). .[.To enrich the fuel of the air-fuel mixture in the higher load range, a width of opening of the stowage compartment (40) is provided where the stowage air pressure at the corresponding RPM's becomes smaller than the leakage fuel pressure and the rotor (14) delivers additional fuel. .]. A ventilating passage (42) connects the stowage compartment (40) with the annulus (33) which conducts the fuel discharged from the fuel outlet opening (16) to the spray ring (35) below the blades (38). .[.This ventilation ensures an undisturbed fuel delivery into the annulus (33). This injection device produces an air-fuel mixture in which the toxic constituents in the exhaust lie uniformly below the limit values and there are no high peak values for the toxic constituents..]. .Iadd.When the rotor (14) is at rest, an internal fuel level "N" is established therein. During ingested air-driven rotation of the rotor, fuel is sequentially flowed through the fuel feed stud (8) downward across the at-rest fuel level, laterally through the rotor via an internal passage portion (17c) therein, upwardly through the rotor, via an internal passage portion (17d) therein, across the fuel level, and then outwardly through a lateral fuel outlet opening (16) into a concentric annulus (33). The fuel then flows downward through the annulus (33) to the spray ring (35) below the blades (38).
Abstract:
Liquid fuel is converted into gaseous form in an enclosed chamber rotating at high speed (e.g., 10,000 rpm). The fuel is delivered to a surface of a flat disc rotating about an axis perpendicular to the disc at the center. The fuel flows across the disc surface in a thin film to promote evaporation. Any unevaporated liquid fuel is retained by centrifugal force against the peripheral outer wall of the rotating chamber until the liquid completely vaporizes. The evaporated fuel mixes with air flowing into the chamber through an inlet opening opposite the disc evaporating surface. The mixture flows outwardly, around the edge of the disc, then inwardly between the back of the disc and the upstream edge of an annular baffle to exit from the chamber through an outlet opening of significantly smaller diameter than the maximum inner diameter of the chamber as a thorougly mixed dry gaseous combination of fuel and air.
Abstract:
The device consists of a rotor (4) which is arranged in a suction pipe (1) and rotatably supported. The rotor (4) includes a hollow jacket body (5) on the outer wall of which vanes (2, 3) are arranged. A nozzle holder (26) is guided through the end (10) of the jacket body (5) directed against the air stream, which holder bears the injection nozzle (9) and is connected at the rear end with the fuel feed line (8). The fuel jets (24, 25) coming out of the injection nozzle (9) are directed against the inner wall (20) of the jacket body (5). This forms, at the same time, the jacket surface of the core hollow space (6) which widens toward the open end (11) of the jacket body (5). At the open end (11) is a centrifuge ring (14) with a spray edge (23). The rotor (4) is set in rotation by the stream of air flowing in the direction of the arrows (30, 31), and mixes the fuel centrifuged from the spray edge (23) homogeneously with the air. A measuring probe (28) determines the rpm of the rotor (4) and controls the influx of fuel through a pump to the fuel feed line (8) and thus to the injection nozzle (9).
Abstract:
An injection molded plastic turbine rotor for a rotor-type carburetor is assembled by simply pressing together upper and lower generally cylindrical sections. When joined in this manner the two sections form in the assembled rotor an internal circumferential seal between the two sections, and an internal passageway system which defines a centrifugal pump mechanism within the turbine rotor. In an alternate embodiment, the rotor includes a third plastic section which is captively retained within the rotor, between the upper and lower sections thereof, and is adapted to lockingly receive an end portion of a fuel supply tube inserted downwardly through a central opening formed through the upper section.
Abstract:
A mixture preparation apparatus for mixture-compressing, externally ignited internal combustion engines, which serves to improve the output and to reduce both fuel consumption and the proportion of toxic components in the exhaust gas of the internal combustion engine. The mixture preparation apparatus comprises a rotatable vane body having vanes, or scoop members, disposed in the air intake line across the air flow direction, and including a portion arranged to extend into a section of the air intake line. The rotatable scoops are disposed in the region of an annular flow channel, so that between the inflow and the outflow side of the flow channel a constant, yet arbitrarily variable pressure difference can be regulated. The structure revealed requires only a small air component to drive the vane body, and thus only a limited energy requirement is present. The axial displacement motion of the vane body or of a cover body connected to the vane body represents a standard for the induced air quantity and can serve to control a fuel apportionment apparatus.
Abstract:
An apparatus for injecting a fuel-air mixture, including a cup-shaped gas delivery hood with a bottom part of a jacket part between the valve end of a fuel injection valve and a gas delivery element, the jacket part has at least one gas delivery opening through which gas is injected and which strikes the injected fuel. The size of the opening cross section, which meters the gas, of the at least one gas delivery opening is accordingly fixed from the very outset and need not be adjusted. Moreover, because of a directional flow of the delivery of gas, very good atomization of the fuel is attained. The embodiment of the apparatus is especially well-suited for use in mixture-compressing internal combustion engines with externally supplied ignition.
Abstract:
The annulus (20) around the fuel feed stud (8) which seals the rotor (14) of this central injection device is connected to a stowage compartment (40) for intake air by way of a ball bearing (7). In the case of the impeller (31, 35) driven rotor (14), the stowage air pressure counteracts the leakage fuel pressure in the annulus (20). By adapting the width of the opening of the stowage compartment (40), the stowage air pressure is adjusted to be equal to or slightly higher than the leakage fuel pressure, so that no fuel can flow out of the annulus (20). To enrich the fuel of the air-fuel mixture in the higher load range, a width of opening of the stowage compartment (40) is provided where the stowage air pressure at the corresponding RPM's becomes smaller than the leakage fuel pressure and the rotor (14) delivers additional fuel. A ventilating passage (42) connects the stowage compartment (40) with the annulus (33) which conducts the fuel discharged from the fuel outlet opening (16) to the spray ring (35) below the blades (38). This ventilation ensures an undisturbed fuel delivery into the annulus (33). This injection device produces an air-fuel mixture in which the toxic constituents in the exhaust lie uniformly below the limit values and there are no high peak values for the toxic constituents.