Orbital Australia Pty Limited

Other

Orbital Austrialia Pty Ltd

Fjolblendir Limited

David James Caley

Geoffrey Paul Cathcart

Stephen Brian Glover

Morten Kronstedt

Kristjan Björn Omarsson

John Howard Tubb

Mario Charles Muscat

Stephen John Karay

Arminta Chicka

Thomas Gerlach

Simon Christopher Brewster

Kristjan Bjoern Omarsson

John William Paluch

A dual-fluid injection system for an internal combustion engine, and an unmanned aerial vehicle (UAV) powered by an engine having the dual-fluid injection system. The dual-fluid injection system comprises a liquid fuel metering device and a fluid delivery device operating in tandem. A gas supply system comprising an air compressor and an air delivery path extending between the air compressor and the fluid delivery device is provided to supply pressurised air to the fluid delivery device. The gas supply system comprises an air compressor and an air delivery path extending between the air compressor and the fluid delivery device. A fuel supply system is adapted to deliver liquid fuel to the liquid fuel metering device. A fuel-air regulator is provided for regulating fuel pressure with reference to air pressure to establish and maintain a requisite pressure differential between the fuel pressure and the air pressure. The fuel-air regulator is located remotely from the fluid delivery device and more particularly in close proximity to the air compressor. In a preferred arrangement, the fuel-air regulator is mounted on or integrated with the air compressor or a part thereof.

Fuel-air regulator location

A dual fluid injection system which comprises a liquid fuel metering device, a fluid delivery device, and apparatus providing an interface therebetween. The interface conveys liquid fuel along a flow path from the metering device to a mixing zone for mixing with air from a pressurized supply to provide an air-fuel mixture for injection by the fluid delivery device into a combustion chamber of an internal combustion engine. The flow path may involve a directional change by way of a turn section. The flow path is sized such that liquid fuel is retained therein by virtue of capillary action, whereby a quantity of liquid fuel is retained after a delivery event such that the flow path remains substantially filled with liquid fuel in readiness for the next delivery event during operation of the engine.

Fuel injection system

A method for fuelling an internal combustion engine, and a fuel system () for delivering a variety of fuel types to the engine, with selected fuel types typically being chosen according to theft availability. The fuel system () can be configured to accommodate liquid fuels such as gasoline, ethanol or a blend thereof, and gaseous fuels such as CNG, LNG or LPG. The engine is configured to operate on any of the designated liquid fuels, and can switch between the liquid and gaseous fuels. The fuel system () includes a respective common delivery arrangement () for selectively delivering fuel into the combustion chamber of each cylinder of the engine. The common delivery arrangement () comprises at a fluid delivery device () and a liquid metering device () configured for operation in concert. The fluid delivery device () comprises a fluid delivery injector. Fuel is delivered to each combustion chamber is through the same fluid delivery device; that is, the same fluid delivery device () is used, regardless of the fuel type. More particularly, the fluid delivery device () can be used for delivery of gaseous fuel only, delivery of liquid fuel only (by way of an air assist delivery process), or delivery of a fuel mixture comprising the gaseous fuel and the liquid fuel according to the fuelling requirements of the engine at any time.

Multi-fuel delivery system

A fuel injection system () for delivering metered amounts fuel into the combustion chamber or cylinder of an engine. The fuel delivered can selectively comprise a gaseous fuel, a liquid fuel or a fuel mixture comprising the gaseous fuel and the liquid fuel. When the fuel delivered comprises a mixture of the gaseous fuel and the liquid fuel, the quantity of liquid fuel comprises a metered quantity. The quantity of gaseous fuel also comprises a metered quantity, with the metering of the gaseous fuel being regulated by prediction. The injection event involves delivering the liquid fuel and the gaseous fuel, with the metering of the gaseous fuel delivered being adjusted to allow for the quantity of liquid fuel delivered with the gaseous fuel. The injection system () comprises a liquid fuel circuit () and a gaseous fuel circuit (), both communicating with a fuel delivery injector () that delivers fuel to the combustion chamber. The fuel injection system () further comprises an electronic control unit (ECU) for controlling operation of the fuel injection system (). The ECU controls operation of the fuel delivery injector () and a fluid metering injector (). The ECU determines the proportions of liquid fuel and gaseous fuel required to meet the fuelling demand. The ECU operates the fluid metering injector () to deliver the required quantity of liquid fuel into a holding chamber within the fuel delivery injector (). The ECU also predicts the gaseous fuel flow required to deliver the necessary proportion of gaseous fuel and operates the fuel delivery injector () accordingly. In particular, the ECU refers to a 'look-up' map or table to determine the operating parameters of the fuel delivery injector () to deliver the necessary quantity of gaseous fuel in conjunction with the metered quantity of liquid fuel.

Gaseous metering control for dual fluid injector

A fuel injector () for liquid phase injection of liquefied gaseous fuels for combustion chambers of an internal combustion engine. The fuel injector () comprises a nozzle portion () having an end () from which gaseous fuel can be delivered through an outlet (), the end () being configured to prevent or at least inhibit formation of ice thereon upon delivery of gaseous fuel through the outlet.

Fuel injector icing

A carburettor includes a primary air passage (), an adjustable throttle valve () situated within the primary air passage, a fuel supply nozzle () communicating with the primary air passage and connected to a fuel metering valve for varying the amount of fuel discharged through the nozzle. The fuel metering valve includes an elongate sleeve () movably accommodating an elongate valve member (). The sleeve and valve member define a fuel inlet space (). A fuel inlet () communicates with the fuel inlet space. A fuel outlet () passes through the wall of the sleeve () and communicates with the fuel supply nozzle (). A portion of the outer surface of the valve member () is so profiled that the valve member () is movable relative to the sleeve () such that the area of communication between the fuel inlet space () and the outlet () varies progressively between a maximum and a minimum value.

Carburettors

A carburettor including a primary air passage, an adjustable throttle valve situated within the primary air passage, a fuel supply nozzle communicating with the primary air passage and connected to a fuel metering valve for varying the amount of fuel discharged through the nozzle and a rotary input shaft adapted to be connected to an engine speed control member and which is connected to the throttle valve to move the throttle valve between open and closed positions. The rotary input shaft is also connected to a carriage to move the carriage, the carriage carrying at least one elongate inclined ramp which extends in the direction of movement of the carriage and which is engaged by a follower connected to the valve member. Rotation of the input shaft results in movement of the throttle valve and in movement of the carriage and thus of the elongate ramp, wherein the follower is moved transverse to the length of the ramp and the valve member of the fuel metering valve is thus also moved.

Fuel injection apparatus comprising a solenoid coil (); an armature () coupled with a valve element () operable to open and close a fuel valve () when the solenoid coil () is selectively energized and de-energised. The valve element () is biased to the closed position by a biasing device (). Magnetic force from the energized solenoid coil moves the armature () and valve element () to open the valve to an opening position to deliver fuel reached when a controller () calculates opening forces balance closing forces. Such opening position control is used to control fuel flow rate to a gas fuelled engine () and/or reduce noise vibration harshness in varied engine types. Balance of forces control, on closing of the valve, reduces or avoids impact of the valve element () with a physical stop (), thus reducing engine noise, and can be used in fuel metering.

Growing community of inventors

City Beach, Australia

David James Caley