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 from the second pipe two pipes are branched off, the first of which ending with a fuel injection nozzle positioned on the upstream side of the throttle valve and the second being connected to a gauged injection nozzle for supplying the fuel required for the slow running, said pipes being each controlled by an electrovalve which normally is opened, but is shut under the control of a pressure transducer responsive to the vacuum degree in the inside of the fuel intake manifold of the engine cylinder on the downstream side of the throttle valve and which is designed to operate only when the vacuum degree into said manifold is below a predetermined minimum value.
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 system for an internal combustion engine employs fluid logic devices for controlling a fuel injector valve. The fuel requirement is delivered in intermittent pulses having variable time duration as necessary to meet changes in the fuel requirement. Fluid logic devices provide a control signal for operating the fuel injector valve in the form of a train of pulses having a repetition rate N and pulse width of Q/N where N is a function of engine speed and Q is a function of the flow rate of air inducted into the engine. Thus the train of pulses provides a control signal related to N X (Q/N) Q which is desirable for maintaining a selected air-fuel ratio. The logic circuitry includes a variable pulse width multivibrator having an external bias connection providing an output signal in the form of a train of pulses having a repetition rate corresponding to a first input signal and a pulse width related to the reciprocal of the bias signal pressure.
Abstract:
Fluidic amplifiers responsive to vacuum air signals developed in an engine intake manifold to control fuel delivery to the engine. Fluidic elements are immersed in a fuel containing reservoir with air vacuum control signals applied at a downstream location through an output leg of the fluidic elements and an atmospheric air bleed is provided in the output leg in a horizontal plane above the fluidic elements and reservoir.
Abstract:
A fluidically controlled fuel injection system wherein fuel is delivered to the engine in pulses, the repetition rate of the pulses corresponding to engine speed, and the duration of the pulses being determined primarily by engine manifold vacuum. Pneumatic means may be provided to compensate the fuel injection system for variations in air temperature, engine temperature, and atmospheric pressure.