Abstract: An improved fuel delivery system which combines the advantages of an ultrasonic spray with fluidic metering of fuel. A fuel delivery system is provided which includes a plurality of fluidic controls each of which is responsive to a particular engine condition. The fluidic controls are disposed in fluidic branches to meter fuel flow in response to each engine operating conditions. The fluidic devices are preferably configured in four branches to respond to choke (start), idle, acceleration and cruise conditions to meter fuel to an ultrasonic atomizing spray device.

Abstract: An improved fuel supply system for an internal combustion engine, which sem is of the type including a fuel reservoir connected to a pump to supply the carburetor with more fuel than required by the engine, and a recycling system for recycling the excess fuel to a predetermined point in the fuel supply system upstream of the carburetor. The recycling system includes a recovery chamber for collecting excess fuel, a duct for feeding the excess fuel from the recovery chamber to an intermediate chamber, and a duct feeding fuel from the intermediate chamber back into the supply system at the predetermined point. The last-mentioned duct is controlled by a float valve responsive to the level of fuel in the intermediate chamber.

Abstract: Carburetor for supplying intermixed air and atomized fuel to an engine comprises an air passageway, having a throttle for passing a controllable amount of atmospheric air, and injection means configured for injecting pressurized fuel into the air passageway in a generally flat spray pattern disposed substantially normal to the air passageway. A bypass chamber is located adjacent to the air passageway, opening thereto for capturing any unimpeded fuel injected by the injection means, returning it to the fuel tank. A metering vane located in the air passageway is configured for allowing passage of substantially all of the fuel into the bypass chamber when there is no airflow in the air passageway and for intercepting a portion of the fuel when the spray pattern is deflected by airflow in the air passageway, directing it into the air passageway. The metering vane is shaped such that the deflected portion of the fuel remains in a predetermined ratio with the airflow over the full range of engine operation.

Abstract: An air-fuel ratio control system for internal-combustion engines with controlled ignition and fed by a liquid fuel, supplied through a main pump and which during the operation is at least partially deviated into a re-cycle circuit and which, as the throttle valve controlling the intake pipe at least partially opens, is injected into said intake pipe to be mixed with the carburation air, wherein from the main pipe supplying the fuel three pipes are branched off, all ending into the inner chamber of a fluidistor, one of which supplying fuel at a constant delivery rate, the second pipe conveying fuel at a constant but adjustable delivery rate, and the third pipe conveying fuel at a variable delivery rate controlled by a pressure sensitive diaphragm valve in response to the resultant value of the subatmospheric pressure into the intake pipe sensed on the upstream and on the downstream side of the throttle valve, the fluidistor having two outlet pipes, the first of which is connected to a re-cycle reservoir and fr

Abstract: Method and apparatus for providing a stratified charge of air and a fuel-rich, fuel-air mixture to each combustion chamber of an internal combustion engine having more than one combustion section by providing alternate sources of intake air at the intake of each combustion chamber, establishing a fuel-rich, fuel-air mixture in one alternate source and switching between the alternate sources during induction of a charge of fuel and air in one of the combustion sections in response to a cyclic pressure change in another combustion section such that the charge passing into each combustion chamber will be stratified into portions of air and a fuel-rich, fuel-air mixture.

Abstract: A fluidic fuel charge injection device for an internal combustion engine includes an impacting stream device having a deflection control nozzle and a control chamber enclosing a main stream nozzle. The device is mounted in the engine manifold to introduce the fuel charge. The device operates at high pressure levels and the control signals are amplified to the necessary power level. An engine revolutional signal is a modulated pulse width signal formed by triggering of high power level fluidic amplifying devices which include a plurality impacting stream fluidic operating as NOR logic elements. An amplifying section includes a transverse impact modulator follower (TIMF) connected to the logic output to produce a pair of interrelated fluid signals proportional to the engine RPM. The pair of signals are applied to the control chambers or through a fluidic coupling stage to a control chamber or to the main stream nozzle for controlling the air-fuel mixture and the introduction of the charge into the manifold.

Abstract: A fuel metering device for providing a controlled flow of fuel from a fuel outlet port comprising a body portion, having a fuel valve therein adapted to intermittently admit fuel to a fuel chamber. The fuel chamber partly defines a fuel flow path to the fuel port and a fuel dispersing element is provided in the chamber having a conical dividing surface disposed in the fuel path on the upstream side of the fuel port. The fuel dispersing element includes internal air passages extending through same, the air passage means emitting air in the fuel port centrally of the fuel flow path at the fuel outlet port.

Abstract: A fuel system for an internal combustion engine employs fluid logic and amplifier devices for monitoring and processing pressures from both a venturi and inlet manifold to measure the air inducted into the engine and provides pneumatically controlled fuel injection in which fuel is metered in accordance with the air inducted into the engine by means of regulating the time duration of fuel injection.

Abstract: A fluidic implementation of a constant mass airfuel ratio fuel-injection system which may be utilized, for example, in an internal combustion engine. The system includes a fluidic mass air flow sensor that produces a pressure oscillation in direct proportion to the mass air flow to the engine. The frequency of this oscillation is utilized to control a fuel flow metering device which delivers a fixed amount of fuel per oscillation cycle. In one preferred embodiment, the metering device may comprise a fixed displacement piston pump. In an alternative embodiment, the metering device comprises a constant pulse-width fluidic amplifier.