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AssigneeKwik Products International Corporation
InventorRudolf Diener
Estimating the term…
An airstream driven rotor assembly with a centrifugal pump forcing a measured fuel quantity through a fixed orifice in direct substantially linear proportion to rotor speed and thus to airstream volume. The ultimate fuel-air ratio is corrected for optimum operation by slightly changing, in response to measured parameters, one of the mixture constituents. In one embodiment, the fuel discharge bore (9) of a rotor (7) is dimensioned that the rotor carburetor (2) produces a lean mixture with a .lambda.-value which is constant for all operating points approximately 1.25. For fuel-air ratio correction additional fuel is brought into atomization ring (11) of rotor (7), by which the fuel-air ratio in the lean mixture is changed and at the engine operating points the .lambda.-values are adjusted to give most favorable fuel consumption, output and pollution. The fuel-air ratio correction apparatus includes a regulated injection pump (20) with an injection nozzle (39a) directed at the internal wall (13) of the atomization ring (11) with approximately 50 mm.sup.3 of additional fuel delivered per stroke, and a regulating device (50) with a pulse generator (40) for driving injection pump (20) with pulses of regulated frequency. The regulation of repetition frequency is controlled by control signal generators in dependence on operating parameters of the engine such as opening of the throttle valve (18) for acceleration correction, coolant temperature for the cold start correction, etc. In other embodiments, the air volume is reduced to enrich the mixture, and in another, the air velocity is increased to enrich the mixture.
Fuel-air ratio correcting apparatus in a rotor-type carburetor for internal combustion engines with spark ignition for producing ingestion air with fuel-air ratios within a predetermined range defined by lean and rich limits matched to the requirements of the various operational points of the internal combustion engine, wherein the rotor-type carburetor has a rotating element including a turbine which is driven by a turbine driving airstream which is induced by the engine and which becomes at least a portion of the ingested air stream, the rotating element containing a centrifugal pump for delivering a quantity of fuel which is in a substantially constant ratio to the rotational velocity of the rotating element, the fuel being delivered to a coaxial, centrifugal atomization means, carried on the rotating element for rotation therewith, for broadcasting atomized fuel into the driving airstream, the centrifugal pump being sized to deliver a quantity of fuel to the driving airstream to establish a fuel-air ratio at one limit of the predetermined range, and means for sensing one or more parameter(s) affecting operation of the internal combustion engine and for selectively varying the volume of at least one of the constituents of the fuel-air mixture ingested by the engine for establishing a predetermined fuel-air ratio variable over the remainder of the range of fuel-air ratios in dependence on one or more measured operating parameter(s) of the internal combustion engine, the rotating element components being designed to produce a fuel-air ratio between the fuel delivered by the rotating element and the ingested air driving the rotating element which is at the lean limit of the range of fuel-air mixtures, and additional fuel being added to the ingested fuel-air stream to establish other fuel-air ratios within the range by an additional injection pump and being passed through the centrifugal means for atomizing the fuel as it is broadcast into the driving airstream.
Fuel-air ratio correcting apparatus in a rotor-type carburetor for internal combustion engines with spark ignition for producing ingestion air with fuel-air ratios within a predetermined range defined by lean and rich limits matched to the requirements of the various operational points of the internal combustion engine, wherein the rotor-type carburetor has a rotating element including a turbine which is driven by a turbine driving airstream which is induced by the engine and which becomes at least a portion of the ingested air stream, the rotating element containing a centrifugal pump for delivering a quantity of fuel which is in a substantially constant ratio to the rotational velocity of the rotating element, the fuel being delivered to a coaxial atomization means on the rotating element for broadcasting atomized fuel into the driving airstream, the centrifugal pump being sized to deliver a quantity of fuel to the driving airstream to establish a fuel-air ratio at one limit of the predetermined range, and means for sensing one or more parameter(s) affecting operation of the internal combustion engine and for selectively varying the volume of at least one of the constituents of the fuel-air mixture ingested by the engine for establishing a predetermined fuel-air ratio variable over the remainder of the range of fuel-air ratios in dependence on one or more measured operating parameter(s) of the internal combustion engine, the fuel-air ratio being selectively adjusted from the lean end of the range toward the rich end of the range by means for selectively increasing the velocity on a given volume of driving airstream over the turbine to thereby increase the volume of fuel delivered by the centrifugal pump relative to the volume of the driving airstream to thereby enrich the fuel-air ratio.
Fuel-air ratio correcting apparatus in a rotor-type carburetor for internal combustion engines with spark ignition for producing ingestion air with fuel-air ratios within a predetermined range defined by lean and rich limits matched to the requirements of the various operational points of the internal combustion engine, wherein the rotor-type carburetor has a rotating element including a turbine which is driven by a turbine driving airstream which is induced by the engine and which becomes at least a portion of the ingested air stream, the rotating element containing a centrifugal pump for delivering a quantity of fuel which is in a substantially constant ratio to the rotational velocity of the rotating element, the fuel being delivered to a coaxial atomization means on the rotating element for broad-casting atomized fuel into the driving airstream, the centrifugal pump being sized to deliver a quantity of fuel to the driving airstream to establish a fuel-air ratio at one limit of the predetermined range, and means for sensing one or more parameter(s) affecting operation of the internal combustion engine and for selectively varying the volume of at least one of the constituents of the fuel-air mixture ingested by the engine for establishing a predetermined fuel-air ratio variable over the remainder of the range of fuel-air ratios in dependence on one or more measured operating parameter(s) of the internal combustion engine, the rotor-type carburetor having a rotor driven via an impeller by the ingested air stream, the rotor containing a centrifugal pump for delivering via at least one lateral fuel discharge bore (9) a quantity of fuel which is in a constant ratio to the ingested air and which is dimensioned for a lean mixture, the rotor carrying a coaxial atomization ring (11) with an inner wall (13) for receiving the fuel delivered by the centrifugal pump, as well as an annular spray edge (14) for atomizing the fuel received in the injected air stream, characterized by a controlled fuel injection pump (20) the outlet (25) of which is connected to deliver fuel into the atomization ring (11), and by a regulating device (50) for controlling the fuel injection pump (20) and by which the fuel injection pump (20) and the control device (50) are dimensioned and fixed, in order to set the fuel-air ratio of the lean mixture to the fuel-air ratio predetermined for the operating point of the internal combustion engine by delivery to the atomization ring (11) of corrective amounts of fuel the quantity of which is regulated in dependence on one or more operating parameter(s) of the internal combustion engine.
A rotor-type carburetor for mixing fuel and air to form a fuel-air mixture ingested by an engine, comprising:
Dependencies are inferred from the claim text.