EP2918815A1 - Method of use of an integrated fuel injector igniters configured to inject multiple fuels and/or coolants - Google Patents
Method of use of an integrated fuel injector igniters configured to inject multiple fuels and/or coolants Download PDFInfo
- Publication number
- EP2918815A1 EP2918815A1 EP15155090.2A EP15155090A EP2918815A1 EP 2918815 A1 EP2918815 A1 EP 2918815A1 EP 15155090 A EP15155090 A EP 15155090A EP 2918815 A1 EP2918815 A1 EP 2918815A1
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- Prior art keywords
- fuel
- ignition
- flow channel
- coolant
- valve
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/06—Fuel-injectors combined or associated with other devices the devices being sparking plugs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
- F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
- F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
Definitions
- the following disclosure relates generally to integrated fuel injectors and igniters suitable for adaptively injecting multiple fuels and/or coolants into a combustion chamber.
- Fuel injection systems are typically used to inject a fuel spray into an inlet manifold or a combustion chamber of an engine. Fuel injection systems have become the primary fuel delivery system used in automotive engines, having almost completely replaced carburetors since the late 1980s. Conventional fuel injection systems are typically connected to a pressurized fuel supply, and fuel injectors used in these fuel injection systems generally inject or otherwise release the pressurized fuel into the combustion chamber at a specific time relative to the power stroke of the engine. In many engines, and particularly in large engines, the size of the bore or port through which the fuel injector enters the combustion chamber is small. This small port accordingly limits the size of the components that can be used to actuate or otherwise inject fuel from the injector. Moreover, such engines also generally have crowded intake and exhaust valve train mechanisms, further restricting the space available for components of these fuel injection systems.
- coolant can include any fluid (e.g., gas or liquid) that produces cooling.
- a coolant can include non-combusting fluid.
- a coolant can include a fuel that ignites and/or combusts at a lower temperature than another fuel.
- a fluid e.g., a coolant
- a fluid provides cooling of substances such as air or components of a combustion chamber.
- FIG. 1A is a cross-sectional side view of an integrated injector/igniter 100 (“injector 100") configured in accordance with an embodiment of the disclosure.
- the injector 100 includes a body 102 having a middle portion 104 extending between a first end portion or base portion 106 and a second end portion of a nozzle portion 108.
- the nozzle portion 108 is configured to at least partially extend through an engine head 110 to inject and ignite fuel at or near an interface 111 of a combustion chamber 112.
- the injector 100 is particularly suited to provide adaptive and rapid actuation of two or more fuels, coolants, or combinations of fuels and coolants.
- the injector 100 includes a core assembly 113 extending from the base portion 106 to the nozzle portion 108.
- the injector 100 also includes a body insulator 142 coaxially disposed over at least a portion of the core assembly 113.
- the core assembly 113 includes an ignition conduit, rod, or conductor 114, an ignition insulator 116, and a valve 118.
- the ignition insulator 116 is coaxially disposed over at least a portion of the ignition conductor 114 and extends from the base portion 106 to the nozzle portion 108.
- the valve 118 is coaxially disposed over at least a portion of the ignition insulator and moves longitudinally through the body 102.
- the valve 118 is an inwardly opening valve (e.g., opening in a direction away from the combustion chamber) and is movable relative to the core insulator 114 to selectively introduce fuel from the nozzle portion 108 into the combustion chamber 112. More specifically, the valve 118 is configured to slide or otherwise move relative to the core insulator 116 in directions that are generally parallel to a longitudinal axis of the injector 100.
- the valve 118 includes a first end portion in the base portion 106 that engages a valve operator assembly 125.
- the valve 118 also includes a second or sealing end portion 119 that engages or otherwise contacts a valve seal 121 in the nozzle portion 108 carried by the second ignition feature 150.
- the sealing end portion 119 also includes an exit opening 107 positioned radially inwardly from the valve seal 121. As described in detail below, the exit opening 107 allows a fuel or coolant to pass from a second flow passage 133 to be adjacent to the valve seal 121, and when the sealing end portion 119 spaces apart from the valve seal 121, the fuel or coolant can exit the nozzle portion 108.
- the sealing end portion 119 and/or the valve seal 121 can include one or more elastomeric portions.
- the valve operator assembly 125 actuates the valve 118 relative to the ignition insulator 116 between an open position and a closed position (as shown in Figure 1A ). In the open position, the sealing end portion 119 of the valve 118 is spaced apart from the valve seal 121 to allow fuel or coolant to flow past the valve seal 121 and out of the nozzle portion 108 to produce distribution pattern 160 as shown in Figure 1A .
- the valve 118 can be made from reinforced structural composites as disclosed in U.S. Patent Application No. 12/857,461, filed August 16, 2010 , and entitled "INTERNALLY REINFORCED STRUCTURAL COMPOSITES AND ASSOCIATED METHODS OF MANUFACTURING,” which is incorporated herein by reference in its entirety.
- the valve 118 can be made from relatively low density spaced graphite or graphene structures that provide the benefits of reducing inertia, achieving high strength and stiffness, and providing high fatigue endurance strength.
- the valve 118 can be constructed from a light weight but strong graphite structural core that is reinforced by one or more carbon-carbon layers.
- the carbon-carbon layer(s) may be prepared from a suitable precursor application of carbon donor (e.g., petroleum pitch or a thermoplastic such as a polyolefin or PAN).
- the one or more carbon-carbon layers can further provide radio frequency shielding and protection. Additional protection may be established by plating the outer surface of the valve 118 with a suitable alloy, such as a nickel alloy that may be brazed to the valve 118 by a suitable braze alloy composition.
- the ignition conductor 114 includes an end portion 115 proximate to the interface 111 of the combustion chamber 112 that includes one or more ignition features that are configured to generate an ignition event.
- the ignition conductor 114 also includes a first flow passage or channel 124 extending longitudinally through a central portion of the ignition conductor 114.
- the ignition conductor 114 is operably coupled to a first terminal 127 at the base portion 106.
- the first terminal 127 is configured to supply ignition energy (e.g., voltage), as well as a first fuel or first coolant, to the ignition conductor 114. More specifically, the first terminal 127 includes a first inlet passage 123 that is fluidly coupled to the first flow channel 124.
- the first terminal 127 is also configured to be coupled to a first fuel or coolant source, as described in detail below, to introduce the first fuel or coolant into the first flow channel 124 via the first inlet passage 123.
- the ignition conductor 114 therefore dispenses the first fuel or coolant into the combustion chamber 112 via the first flow channel 124.
- the first terminal 127 is also coupled to a first ignition energy source via a first ignition source conductor 129.
- the first ignition source conductor 129 accordingly provides first ignition energy to the ignition conductor 114 via the first terminal 127.
- the ignition conductor 114 can therefore ignite the first fuel at the nozzle portion 108 with the first ignition energy.
- the first terminal 127 can supply at least approximately 80KV (DC or AC) to the ignition conductor 114. In other embodiments, however, the first terminal 127 can supply a greater or lesser voltage to the ignition conductor 114.
- the first flow channel or passage 124 is electrically isolated or insulated from the second flow channel or passage 133. This electrical isolation allows for different ignition energies to be applied to the different fuels that flow through these passages.
- the second flow passage 133 can include multiple discrete or fluidly separated channels or passages (see, e.g., Figures 1C and 1D ). As such, different fuels and/or coolants can be separately transmitted through the second flow passage 133, in addition to different fuels and/or coolants that pass through the first flow channel or passage 124.
- a first fuel or first coolant can flow through the first flow passage 124, a second fuel or second coolant can flow through a first discrete channel in the second flow passage 133, and a third fuel or third coolant can flow through a second discrete channel in the second flow passage 133.
- more than three fuels or three coolants can flow through the various flow channels.
- the injector 100 further includes an insulated second terminal 152 at the middle portion 104 or at the base portion 106.
- the second terminal 152 is electrically coupled to the second ignition feature 150 via a second ignition conductor 154.
- the second ignition conductor 154 can be a conductive layer or coating disposed on the ignition insulator 116.
- the second ignition conductor 154 accordingly transmits the ignition energy (e.g., voltage) to the second ignition feature 150 at the nozzle portion 108.
- the second ignition feature 150 is coaxial and radially spaced apart from the end portion 115 of the ignition conductor 114.
- the second ignition features 150 can include a plurality of threads or acicular protrusions extending circumferentially around and spaced apart from the end portion 115 of the ignition conductor 114.
- the second terminal 152 can be omitted and ignition energy can be supplied to the second ignition feature from a force generator assembly carried by the base portion 106.
- the injector 100 further includes an energy storage provision such as capacitor 158 carried by the body 102.
- the capacitor 158 is positioned in the body insulator 142 at the middle portion 104. In other embodiments, however, the capacitor 158 can be positioned at other locations, including for example, at or near the nozzle portion 108.
- the capacitor 158 is configured to provide ignition energy to ignite one or more fuels.
- the capacitor 158 is coupled to the second ignition conductor 154.
- the capacitor can be charged by energy harvested from the combustion chamber 112 or from another suitable source.
- the capacitor can be charged with and store ignition energy from photovoltaic, thermoelectric, acoustical, and/or pressure energy harvested from the combustion chamber 112.
- the injector 100 is configured to provide different amounts or values of ignition energy as needed to ignite the corresponding fuels or coolants.
- the first terminal 129 can provide a greater ignition energy than ignition energy from the second terminal 152, induced ignition energy in the force generator assembly 128, and/or stored ignition energy from the capacitor 158 for the purpose of initiating ignition of fuels that are relatively difficult to ignite.
- these additional ignition energy sources can provide the greater ignition energy.
- any of these ignition energy sources can be used for the purpose of sustaining the ignition event.
- the injector 100 also includes a second flow passage or channel 133.
- the second flow channel 133 extends longitudinally through the body 102 from the base portion 106 to the nozzle portion 108. More specifically, the second flow channel 133 extends coaxially with the stem portion of the valve 118 and is spaced radially apart from the stem portion of the valve 118. As explained in detail below, a second fuel or coolant can enter the second flow channel 133 from the base portion 106 of the injector 100 to pass to the combustion chamber 112.
- the second flow channel 133 can include multiple discrete sub-channels or passages that are fluidly separated from one another, and that are coupled to corresponding individual fuel inlet passages 151 (identified individually as a first inlet passage 151 a and a second inlet passage 151b). As such, multiple different second fuels and/or second coolants can travel through the corresponding sub-channels of the second flow passage 133.
- the injector 100 can also include one or more sensors that are configured to detect properties or conditions in the combustion chamber 112.
- injector 100 includes sensors or fiber optic cables 117 extending longitudinally through the body 102 from the base portion 106 to the nozzle portion 108.
- the fiber optic cables 117 can be coupled to or otherwise extend along with the ignition conductor 114.
- the fiber optic cables 117 can be coupled to one or more controllers or processors 122 carried by the body 102.
- the fiber optic cables 117 expand or otherwise fan radially outwardly at the nozzle portion 108 in the space between the ignition conductor 114 and the second ignition features 150.
- the expanded end portion of the fiber optic and/or other sensor cables 117 provides an increased area for the fiber optic cables 117 to gather information at the interface with the combustion chamber 112.
- the injector 100 also includes a force generator assembly 128 carried by the base portion 106.
- the valve operator assembly 125 is operably coupled to the valve 118 and configured to move the valve 118 between the open and closed positions in response to the force generator assembly 128.
- the valve operator assembly 125 moves the valve 118 longitudinally in the injector 100 relative to the ignition insulator 116.
- the valve operator assembly 125 includes at least an actuator or driver 120 that is coupled to the valve 118.
- the force generator assembly 128 includes a force generator 126 (e.g., an electric, electromagnetic, magnetic, etc. force generator) that induces movement of the driver 120.
- the force generator 126 can be a solenoid that induces a magnetic field to move a ferromagnetic driver 120.
- the force generator assembly 128 can include two or more solenoid windings acting as a transformer for the purpose of inducing movement of the driver 120 and generating ignition energy.
- a force generator assembly 128 having two or more force generators 126 can be configured to control fuel flow by opening any of the valve assemblies, and to produce of ionizing voltage upon completion of the valve opening function.
- each force generator assembly 128 can be a solenoid winding including a first or primary winding and a secondary winding.
- the secondary winding can include more turns than the first winding.
- Each winding can also include one or more layers of insulation (e.g., varnish or other suitable insulators), however the secondary winding may include more insulating layers than the first winding.
- a force generator 126 as a transformer with a primary winding and a secondary winding of many more turns, the primary winding can carry high current upon application of voltage to produce pull or otherwise induce movement of the driver 120. Upon opening the relay to the primary winding, the driver 120 is released and a very high voltage will be produced by the secondary winding.
- the high voltage of the secondary winding can be applied to the plasma generation ignition event by providing the initial ionization, after which relatively lower voltage discharge of a capacitor that has been charged with any suitable source (including energy harvested from the combustion chamber 112 by photovoltaic, thermoelectric, and piezoelectric generators) and/or continue to supply ionizing current and thrust of fuel into the combustion chamber.
- suitable force generating assemblies 128 are described in U.S. Patent Application No. , entitled INTEGRATED FUEL INJECTOR IGNITERS HAVING FORCE GENERATING ASSEMBLIES FOR INJECTING AND IGNITING FUEL AND ASSOCIATED METHODS OF USE AND MANUFACTURE (Attorney Docket No.
- the force generator assembly 128 includes two or more solenoid windings to induce movement of the driver 120 and generate ignition energy for the second ignition feature 150, the second terminal 152 can be omitted from the injector 100.
- the force generator 128 can also be operably coupled to the processor or controller 122, which can in turn also be coupled to the one or more fiber optic cables 117 extending through the ignition conductor 114.
- the controller 122 can selectively energize or otherwise activate the force generator 126, for example, in response to one or more combustion chamber conditions or engine parameters.
- the force generator 126 actuates the driver 120
- the driver 120 engages one or more stops 130 integrally formed with or otherwise attached to the first end portion of the valve 118 to move the valve 118 between the open and closed positions.
- the valve operator assembly 125 can also include a first biasing member 132 that contacts the valve 118 and at least partially urges the valve 118 to the closed position in a direction toward the nozzle portion 108.
- the valve operator assembly 125 can further include a second biasing member 135 that at least partially urges the driver 120 toward the nozzle portion 108.
- the first biasing member 132 can be a spring, such as a coil spring
- the second biasing member 135 can be a magnet or a permanent magnet.
- the first biasing member 132 and the second biasing member 135 can include other components suitable for providing a biasing force against the valve 118 and the driver 120.
- Embodiments including a magnet or permanent magnet for the second biasing member can provide for relatively fast or quick actuation while inducing or avoiding potential resonance associated with coil springs.
- the injector 100 is configured to inject two or more fuels, coolants, and/or combinations of fuels and coolants into the combustion chamber 112.
- the injector 100 is also configured to ignite the fuels as the fuels exit the nozzle portion 108 into the combustion chamber.
- a first fuel or coolant can be introduced into the first flow passage 124 in the ignition conductor 116 via the first inlet passage 123 in the first terminal 127.
- Precise amounts of fuel and/or coolant can be metered from a pressurized fuel source from a valve assembly as described in detail below.
- the first fuel or coolant travels through the injector 100 from the base portion 106 to the nozzle portion 108.
- the first ignition source conductor 129 can energize or otherwise transmit ignition energy (e.g., voltage) to an ignition feature carried by the ignition conductor 116 at the nozzle portion 108. As such, the ignition conductor 116 can ignite the first fuel at the interface 111 with the combustion chamber 112.
- ignition energy e.g., voltage
- a second fuel or coolant can be introduced into the base portion 106 via the force generator assembly 128.
- a second fuel or coolant can enter the force generator assembly 128 via the second inlet passage 151 b.
- the second fuel or coolant can travel from the second inlet passage 151 through the force generator 128 as indicated by base portion flow paths 139.
- the second fuel or coolant exits the force generator 128 through multiple exit channels 140 and then passes through passages 157 in the driver 120 to reach the second flow channel 133 extending longitudinally adjacent to the valve 118.
- the second flow channel 133 extends between an outer surface of the valve 118 and an inner surface of the body insulator 142 of the middle portion 104 and the nozzle portion 108.
- the body insulator 142 can be made from a ceramic or polymer insulator suitable for containing the high voltage developed in the injector 100, as disclosed in the patent applications incorporated by reference in their entireties above.
- the valve operator assembly 125 and the force generator assembly 128 work in combination to precisely and/or adaptively meter or dispense the second fuel or coolant into the second flow channel 133 and past the sealing head 119 of the valve 118.
- the force generator 126 induces movement of the driver 120 to move the valve 118 longitudinally along the core insulator 116 to space the sealing end portion 119 of the valve 118 away from the valve seal 121.
- the driver 120 moves a first distance D 1 prior to contacting the stop 130 carried by the valve 118.
- the driver 120 can gain momentum or kinetic energy before engaging the valve 118.
- the driver 120 continues to move to a second or total distance D 2 while engaging the valve 118 to exert a tensile force on the valve 118 and move the valve 118 to the open position.
- the sealing head 119 of the valve 118 is spaced apart from the valve seal 121 by an open distance generally equal to the second or total distance D 2 minus the first distance D 1 .
- the ignition conductor 114 and the insulator 116 remain stationary within the body 102.
- the insulator 116 therefore acts as a central journal bearing for the valve 118 and can accordingly have a low friction outer surface that contacts the valve 118.
- the second ignition feature 150 can create an ignition event to ignite the second fuel before or as the second fuel enters the combustion chamber 112.
- the second ignition conductor 150 conveys DC and/or AC voltage to adequately heat and/or ionize and rapidly propagate and thrust the fuel toward the combustion chamber.
- the force generator assembly 128 can provide the ignition energy to the second ignition feature 150 via the second ignition conductor 154.
- the force generator assembly 128 includes a primary solenoid winding or piezoelectric component that induces movement of the driver 120 and also induces voltage in a secondary solenoid winding
- the secondary solenoid winding can provide the ignition energy to the second ignition feature.
- the second terminal 152 can provide the ignition energy to the second ignition feature 150 via the second ignition conductor 154.
- each ignition feature can develop plasma discharge blasts of ionized fuel that is rapidly accelerated and injected into the combustion chamber 112. Generating such high voltage at the ignition features initiates ionization, which is then rapidly propagated as a much larger population of ions in plasma that develops and travels outwardly to thrust fuel past the interface 111 into the combustion chamber 112 into surplus air to provide insulation of more or less adiabatic stratified chamber combustion.
- the injector 100 is capable of ionizing air within the nozzle portion 108 prior to introducing fuel into the ionized air, ionizing fuel combined with air, as well as layers of ionized air without fuel and ionized fuel and air combinations, as disclosed in the patent applications incorporated by reference in their entireties above.
- a rapid combustant such as hydrogen or hydrogen-characterized fuel mixture is made through inlet port 151 and past valve seal 119 to be ignited with relatively low ignition energy by electrode 150.
- a rapid combustant such as hydrogen or hydrogen-characterized fuel mixture
- electrode 150 Such rapid combustion as depicted by distribution pattern 160 thereby rapidly heats and forces rapid evaporation, cracking and completion of combustion of other fuels such as liquid diesel fuel that can be delivered through the second inlet port 123 and through conduit 124 to produce a second distribution pattern 162.
- the second distribution pattern 162 can be different than the first distribution pattern 160.
- This mode of rapid-combustant characterized operation enables other commensurately delivered fuels with relatively difficult ignition characteristics and/or tendencies to produce unburned hydrocarbon and/or particulate emissions including diesel and bunker fuels to be readily combusted without such emissions including applications in engines with insufficient compression ratios, fuel pressure, or operating temperature to provide satisfactory compression ignition.
- fuel selections such as diesel and bunker fuels that normally produce such objectionable emissions are delivered through the second inlet 123 to conduit 124 for injection that is characterized by ionization by heat and/or plasma formation as a result of sufficiently greater ignition energy delivery through electrical lead 129 to force rapid evaporation, cracking and completion of combustion without such emissions.
- ignition energy enables clean utilization of fuels with insufficient cetane ratings for compression ignition and applications in engines with insufficient compression ratios, fuel pressure, or operating temperature to provide satisfactory compression ignition.
- Figure 1B is a cross-sectional end view of an embodiment of a second injector 100b taken substantially along lines 1 B-1 B in Figure 1A . More specifically, the embodiment shown in Figure 1A illustrates the concentric or coaxial arrangement of several of the components of the injector 100. However, for clarity the tubular cross section of valve 118 is not illustrated in Figure 1B .
- the second injector 100b includes a casing 159, such as a metallic or steel casing disposed over the body insulator 142.
- the second flow channel 133 is positioned radially outwardly from the valve and second ignition conductor 154, and the ignition insulator 116 is positioned radially inwardly from the valve and second ignition conductor 154.
- the fiber optic cables 117 are adjacent to the ignition conductor, and the first flow channel 124 extends through the ignition conductor.
- the second flow channel 133 has a generally circular cross-sectional shape. In other embodiments, and as described below, the second flow channel 133 can include shapes other than circular and/or includes multiple sub-channels or discrete separated sub-portions for flowing various different fuels and/or coolants.
- Figure 1C is a cross-sectional end view of a third injector 100c taken substantially along lines 1 B-1 B in Figure 1A .
- the embodiment of the third injector 100c shown in Figure 1C illustrates several second flow sub-channels 133 (identified individually as first through nth sub-channels 133a-133n) between the body insulator 142 and the combination of the second ignition conductor 154 and second valve 118 (for clarity, the tubular cross-section of valve 118 is not illustrated in Figure 1C ).
- the illustrated embodiment includes second flow sub-channels 133 forming a star or gear shaped pattern, in other embodiments these flow channels can have other configurations.
- Figure 1D illustrates an additional embodiment of a fourth injector 100d having multiple discrete or separate second flow sub-channels 133 (identified individually as first through nth sub-channels 133a-133n) forming a generally pentagonal shape (for clarity, the tubular cross section of valve 118 is not illustrated in Figure 1 D) .
- the second flow sub-channels 133 can be arranged in other shapes or configurations.
- Figures 2A-2D are a series of cross-sectional side views of nozzle portions 214 of injectors configured in accordance with embodiments of the disclosure.
- the embodiments illustrated in Figures 2A-2D are configured to provide various spray patterns or distributions of fuels and/or coolants.
- these embodiments provide examples of spray or distribution patterns that can be used to optimize combustion chamber conditions, such as temperature, pressure, completion of the combustion event, etc.
- a first nozzle portion 214a includes a first end portion 215a that dispenses or disperses a first injection or distribution pattern 260a into a combustion chamber. More specifically, the first end portion 215a can have one or more openings that create the first distribution pattern 260a.
- the first distribution pattern 260a can have a generally uniform expanding shape (e.g., cone-shaped).
- the first injection pattern 260a is suitable for a symmetrical combustion chamber.
- a second nozzle portion 214b includes a radially expanding second sleeve valve 262b covering at least a portion of a second end portion 215b.
- the second sleeve valve 262b is configured to open, expand, slide, or otherwise actuate in response to pressurized fuel and/or in response to one or more actuating devices.
- the second sleeve valve 262b at least partially covers one or more second exit openings 266b in the second end portion 215b.
- the second nozzle portion 214b also includes a second end stop or plug 264b at least partially blocking the flow of fuel or coolant out of the second end portion 215b.
- the second exit openings 266b are configured to allow the fuel or coolant to exit the second end portion 215b in a second injection or distribution pattern 260b.
- the second distribution pattern 260b accordingly includes a central void generally surrounded by a radially expanding cone shape of injected fuel and/or coolant.
- a third nozzle portion 214c includes a radially expanding sleeve valve 262c covering at least a portion of a third end portion 215c.
- the third sleeve valve 262c is configured to open, slide, or otherwise expand or actuate in response to pressurized fuel and/or in response to one or more actuating devices.
- the third sleeve valve 262c at least partially covers one or more third exit openings 266c in the third end portion 215c.
- the third nozzle portion 214c also includes a third end stop or plug 264c at least partially blocking the flow of fuel or coolant out of the third end portion 215c.
- the third plug 264c has a generally conical shape that is inserted into an expanded section of the third end portion 215c.
- the third exit openings 266c are configured to allow the fuel or coolant to exit the third end portion 215c in a third injection or distribution pattern 260c.
- the third distribution pattern 260c accordingly includes a conically-shaped radially expanding central void generally surrounded by a corresponding radially expanding cone shape of injected fuel and/or coolant.
- a fourth nozzle portion 214d includes a radially expanding sleeve valve 262d covering at least a portion of a fourth end portion 215d.
- the fourth sleeve valve 262d is configured to open, slide, or otherwise expand or actuate in response to pressurized fuel and/or in response to one or more actuating devices.
- the fourth sleeve valve 262d at least partially covers one or more fourth exit openings 266d in the fourth end portion 215d.
- the fourth nozzle portion 214d also includes a fourth end stop or plug 264d at least partially blocking the flow of fuel or coolant out of the fourth end portion 215d.
- the fourth plug 264d has a generally conical shape that is inserted into an expanded section of the fourth end portion 215d.
- the fourth exit openings 266d are configured to allow the fuel or coolant to exit the fourth end portion 215d in a fourth injection or distribution pattern 260d.
- the fourth distribution pattern 260d accordingly includes a converging central void generally surrounded by a corresponding radially expanding cone shape of injected fuel and/or coolant.
- the embodiments described above with reference to Figures 2A-2D can accordingly provide various fuel and/or coolant distribution patterns (e.g., focused patterns, evenly distributed patterns, etc.) suitable for various ignition and cooling needs.
- various fuel and/or coolant distribution patterns e.g., focused patterns, evenly distributed patterns, etc.
- the embodiments described above with reference to Figures 2A-2D are not exhaustive of all of the different configurations for various fuel distribution patterns.
- the size, shape, orientation, and/or distribution of the exit openings 266 in the corresponding second end portions 215 can provide desired distribution patterns.
- a single nozzle portion 214 can include exit openings 266 having different sizes, shapes, and/or orientations.
- these individual exit openings 266 can provide an outlet for corresponding individual flow channels or passages.
- a first fuel or first coolant can be dispensed through a first flow channel and corresponding exit opening 266 to provide a first distribution or spray pattern in the combustion chamber.
- a second fuel or second coolant can be dispensed through a second flow channel and corresponding exit opening 266 to provide a second distribution or spray pattern in the combustion chamber that is different from the first distribution pattern.
- Additional fuels and/or coolants can be dispensed through corresponding additional flow channels and exit openings.
- Figure 3A is a cross-sectional side view of a valve distribution subassembly 360 (“subassembly 360") that can be operably coupled to the first terminal 127 to deliver a first fuel or a first coolant to the injector 100 (as shown in Figure 1A ) from a pressurized fuel source.
- the subassembly 360 reliably enables control of the delivery of pressurized supplies of various fuels and/or coolants.
- the subassembly 360 is particularly beneficial for enabling various fuels including very low energy density fuels to be utilized in large engines in conjunction with an injector as described herein.
- the subassembly 360 also enables such fuels or coolants to be partially utilized to greatly improve the volumetric efficiency of converted engines by increasing the amount of air that is induced into the combustion chamber during each intake cycle. Although the subassembly 360 is described below in operation with reference to a fuel, in other application embodiments the subassembly 360 can dispense various coolants.
- pressurized fluid such as a fuel is supplied through inlet fitting 362 to the valve chamber shown where a biasing member 364 (e.g., coil spring) urges a valve 366 (e.g., ball valve) toward a closed position on a valve seat 368 as shown in Figure 3A .
- a biasing member 364 e.g., coil spring
- valve 366 e.g., ball valve
- an actuator or push-rod 372 forces the ball valve 366 to lift off of the valve seat 368 to permit fuel to flow around the ball valve 366 and through the passageway to fitting 370 for delivery to the combustion chamber, such as through the first terminal 127 of the injector 100 ( Figure 1A ).
- the push rod 372 can be sealed by closely fitting within a bore 390, or by an elastomeric seal such as an O-ring 374.
- the actuation of push rod 372 can be by any suitable method or combination of methods.
- suitable control of fuel or coolant flow can be provided by solenoid action resulting from the passage of an electrical current through an annular winding 386 within a steel cap 384 in which a solenoid plunger 378 moves axially with connection to the push rod 372, as shown.
- the plunger 378 can be made from a ferromagnetic material that is magnetically soft.
- a sleeve bearing 388 which can be a self-lubricating polymer, or low friction alloy, such as a Nitronic alloy, or a permanently lubricated powder-metallurgy oil-impregnated bearing that is threaded, engaged with an interference fit, locked in place with a suitable adhesive, swaged, or braised to be permanently located on the ferromagnetic pole piece 390.
- the ball valve 366 may also be opened by an impulse action in which the plunger 378 is allowed to gain considerable momentum before providing considerably higher opening force after it is allowed to move freely prior to suddenly causing actuator pin 372 to strike the ball valve 366.
- it may be preferred to provide sufficient "at rest" clearance between the ball valve 366 and the end of the push rod 372 when the plunger 378 is in the neutral position at the start of acceleration towards the ball valve 366 to thereby allow considerable momentum to be developed before the push rod 372 suddenly impacts the ball valve 366.
- a clevis 380 holds a ball bearing assembly 382 in which a roller or the outer race of an antifriction bearing assembly rotates against or over a suitable cam to cause linear motion of the plunger 378 and the push rod 372 toward the ball valve 366.
- a biasing member 376 e.g., coil spring
- suitable operation of unit valve 360 may be by cam displacement of 382 with "hold-open" functions by a piezoelectric operated brake (not shown) or by actuation of electromagnet 386 that is applied to plunger 378 to continue the fuel or coolant flow period after passage of the cam lobe against 382.
- This provides fluid flow valve functions in which a moveable valve element such as 366 is displaced by plunger 372 that is forced by suitable mechanisms including a solenoid, a cam operator, and a combination of solenoid and cam operators in which the valve element 366 is occasionally held in position for allowing fluid flow by such solenoid, a piezoelectric brake, and/or a combination of solenoid and piezoelectric mechanisms.
- Fuel and/or coolant flow from unit valve 360 may be delivered to the engine's intake valve port, to a suitable direct cylinder fuel injector, and/or delivered to an injector having selected combinations of the embodiments described herein. In some applications such as large displacement engines it is desirable to deliver fuel to all three entry points. In instances that pressurized fuel is delivered by timed injection to the inlet valve port of the combustion chamber during the time that the intake port or valve is open, increased air intake and volumetric efficiency is achieved by imparting fuel momentum to cause air-pumping for developing greater air density in the combustion chamber.
- the fuel is delivered at a velocity that considerably exceeds the air velocity to thus induce acceleration of air into the combustion chamber.
- This advantage can be compounded by controlling the amount of fuel that enters the combustion chamber to be less than would initiate or sustain combustion by spark ignition.
- Such lean fuel-air mixtures can readily be ignited by fuel injection and ignition by the injector embodiments described herein, which provides for assured ignition and rapid penetration by combusting fuel into the lean fuel-air mixture developed by timed port fuel injection.
- Additional power may be provided by direct cylinder injection through a separate direct fuel injector that adds fuel to the combustion initiated by an injector such as the injector 100 described above with reference to Figure 1A .
- Direct injection from one or more separate direct cylinder injectors into combustion initiated by the injector assures rapid and complete combustion within excess air and avoids the heat loss usually associated with separate direct injection and spark ignition components that require the fuel to swirl, ricocheting and/or rebounding from combustion chamber surfaces and then to combust on or near surfaces around the spark ignition source.
- Figure 3B is a plan partial view of a distribution assembly 391 configured in accordance with an embodiment of the disclosure.
- engines with multiple combustion chambers are provided with precisely timed delivery of fuel and/or coolant by the arrangement subassemblies 360 in the assembly 391 as shown in the schematic fuel control circuit layout of Figure 3B .
- six subassemblies 360 are located at equal angular spacing within a housing 394.
- the housing 394 provides conduits for pressurized fuel to each subassembly inlet 395 through a manifold 393.
- a cam on a rotating camshaft intermittently actuates corresponding push rod assemblies 397 to provide for precise flow of fuel from inlet 395 to a corresponding outlet 396, which in turn delivers to the fuel or coolant the desired intake valve port and/or combustion chamber directly or through the injector as shown in Figure 1A .
- the housing 394 is preferably adaptively adjusted with respect to an angular position relative to the cam to provide spark and injection advance in response to adaptive optimization algorithms provided by a controller 392 as shown.
- the controller 392 can provide adaptive optimization of each combustion chamber's fuel-delivery and spark-ignition events as a further improvement in efficiency, power production, operational smoothness, fail-safe provisions, and longevity of engine components. Moreover, the controller 392 can record sensor indications including the angular velocity of the cam to determine the time between each cylinder's torque development to derive positive and negative engine acceleration as a function of adaptive fuel-injection and spark-ignition data in order to determine adjustments needed for optimizing desired engine operation outcomes. For example, it is generally desired to produce the greatest torque with the least fuel consumption. However, in areas such as congested city streets where oxides of nitrogen emissions are objectionable, adaptive fuel injection and ignition timing provides maximum torque without allowing peak combustion temperatures to reach 2,200°C (4,000°F). This can be achieved by the disclosure of embodiments described in detail herein.
- the fuels and/or coolants that are supplied to the injectors disclosed herein can be stored in any suitable corresponding storage containers. Moreover, these fuels or coolants can be pressurized to aid in the adaptive delivery of these fuels and/or coolants. In one embodiment, these fuels or coolants can be pressurized in the storage container without the use of a pump. For example, one or more chemical reactions can be controlled or otherwise allowed to occur to pressurize the corresponding fuels or coolants. More specifically, in certain embodiments, the storage container can be configured to store a pressurizing substance such as hydrogen, propane, or ammonia over diesel fuel.
- a pressurizing substance such as hydrogen, propane, or ammonia over diesel fuel.
- the propane can be used as an expansive fluid by changing phase in response to energy that is added to the propane to produce propane vapor and consequently pressurize the diesel fuel storage vessel.
- liquid hydrogen can be added to diesel fuel storage vessel. The liquid hydrogen can accordingly remove heat from the diesel fuel and pressurize the diesel fuel.
- ammonia or mothballs can be added to a fuel or coolant to accordingly dissociate and pressurize the fuel or coolant.
- injectors having the features described above can be used to inject and ignite fuels at relatively low pressures.
- such injectors can be used for operating conditions that do not exceed approximately 10 to 15 atmospheres (150 to 300 psi) over the max compression pressure of the engine.
- these injectors can be used for operating conditions that are less than or that exceed approximately 150 to 300 psi over the max compression pressure of the engine. Accordingly, these injectors provide positive ignition and can be adaptively used for fuels that do not have a cetane rating requirement for the fuels.
- the injectors are particularly suited to adaptively control the injection and ignition of various fuels and/or coolants.
- the separate and electrically isolated first and second flow passages allow for different fuels to be injected and ignited.
- these passages can produce different distribution or spray patterns of the fuels or coolants in the combustion chamber.
- the multiple discrete channels in the second flow passage can provide further adaptability or variation for the delivery, distribution, and/or ignition of various fuels and coolants.
- Injectors configured in accordance with embodiments of the disclosure can further be configured to adaptively adjust fuel/coolant delivery and/or ignition based at least upon the valve assembly operation, ignition energy transfer and/or operation, the type of fuel or coolant injected, as well as the pressure or temperature of the fuel or coolant that is injected.
- an injector configured in accordance with an embodiment of the disclosure includes an injector body having a base portion configured to receive a first fuel and at least one of a second fuel and a coolant into the body, and a nozzle portion coupled to the base portion.
- the nozzle portion is configured to be positioned proximate to a combustion chamber for injecting the first fuel and at least one of the second fuel and the coolant into the combustion chamber.
- the injector can also include a valve seal positioned at or proximate to the nozzle portion, an ignition rod extending from the base portion to the nozzle portion, and a valve coaxially disposed over at least a portion of the ignition rod.
- the valve includes a sealing head that moves between an open position in which the sealing head is spaced apart from the valve seal, and a closed position in which the sealing head at least partially contacts the valve seal.
- the injector further includes a first flow channel extending longitudinally through a center portion of the ignition rod, and a second flow channel fluidly separated from the first flow channel and extending longitudinally through the body adjacent to the valve.
- the first flow channel is configured to deliver the first fuel to the nozzle portion
- the second flow channel is configured to deliver at least one of the second fuel and the coolant to the nozzle portion.
- the Injector further includes a first coupling fluidly coupled to the first flow channel to deliver the first fuel to the first flow channel, and a second coupling fluidly coupled to the second flow channel to deliver at least one of the second fuel and the coolant to the second flow channel.
- the injector can also include a pressurized fuel source operably coupled to the injector body, wherein the pressurized fuel source stores the first fuel above an ambient pressure.
- the pressurized fuel source can at least partially pressurize the first fuel without the aid of a pump, and the pressurized fuel source can comprise a storage container that stores the first fuel, and wherein the storage container contains a chemical reaction that at least partially pressurizes the first fuel.
- the injector can also include a capacitor carried by the injector body and configured to store ignition energy to ignite at least one of the first fuel and the second fuel, wherein the ignition energy is harvested from the combustion chamber.
- the injector can further include a third coupling fluidly coupled to the third flow channel to deliver at least one of the third fuel and the second coolant to the third flow channel, as well as an ignition energy conductor operably coupled to the ignition conductor via the first fuel inlet, as well as an ignition energy source carried by the body.
- the first ignition energy is greater than the second ignition energy.
- a method of operating a fuel injector in accordance with embodiments of the disclosure includes introducing a first fuel into a first flow channel in a body of the injector, dispensing the first fuel from first flow channel into a combustion chamber, activating a first ignition feature to at least partially ignite the first fuel, introducing at least one of a second fuel and a coolant into a second flow channel in the body, wherein the second flow channel is fluidly separated from the first flow channel, and actuating a valve to dispense at least one of the second fuel and the coolant from the second flow channel into the combustion chamber.
- the method can also include activating a second ignition feature to at least partially ignite the second fuel after the valve dispenses the second fuel.
- the first flow channel can be electrically isolated from the second flow channel, and wherein activating the first ignition feature includes applying a first voltage to the ignition feature, and activating the second ignition feature includes activating a second voltage to the second ignition feature, the second voltage being less than the first voltage.
- actuating the valve comprises energizing a solenoid winding to induce movement of the valve from a closed position to an open position.
- the solenoid winding is a first solenoid winding and wherein the method can further comprise inducing a voltage in a second solenoid winding proximate to the first solenoid winding, and transmitting the voltage to the second ignition feature.
- actuating the valve to dispense at least one of the second fuel and the coolant comprises actuating the valve in response to a change in at least one operating condition.
- the operating condition comprises at least one of the following: an increased power requirement, a decreased power requirement, a combustion chamber temperature, a combustion chamber pressure, a combustion chamber light value, and a combustion chamber acoustical value.
- the method can also include adaptively controlling at least one of dispensing the first fuel and actuating the valve to dispense at least one of the second fuel and the coolant based on one or more detected combustion chamber properties.
- actuating the valve comprises actuating the valve to dispense the coolant in response to a predetermined temperature in the combustion chamber, and dispensing the first fuel from first flow channel into the combustion chamber comprises dispensing a first non-cetane rated fuel from first flow channel into the combustion chamber.
- the dielectric strength of the insulators disclosed herein may be altered or varied to include alternative materials and processing means.
- the actuators and drivers may be varied depending on fuel and/or the use of the corresponding injectors.
- components of the injector may be varied including for example, the electrodes, the optics, the actuators, the valves, and the nozzles or the bodies may be made from alternative materials or may include alternative configurations than those shown and described and still be within the spirit of the disclosure.
Abstract
Embodiments of injectors configured for adaptively injecting multiple different fuels and coolants into a combustion chamber, and for igniting the different fuels, are disclosed herein. An injector according to one embodiment includes a body having a first end portion and a second end portion. The injector further includes a first flow channel (124) extending through the body, and a second flow channel (133) extending through the body that is separate from the first flow channel (124) and electrically isolated from the first flow channel (124). The first flow channel (124) is configured to receive a first fuel, and the second flow channel (133) is configured to receive at least one of a second fuel and a coolant. The injector further comprises a valve (121) carried by the body that is movable between a closed position and an open position to introduce at least one of the second fuel and the coolant into a combustion chamber.
Description
- The following disclosure relates generally to integrated fuel injectors and igniters suitable for adaptively injecting multiple fuels and/or coolants into a combustion chamber.
- Fuel injection systems are typically used to inject a fuel spray into an inlet manifold or a combustion chamber of an engine. Fuel injection systems have become the primary fuel delivery system used in automotive engines, having almost completely replaced carburetors since the late 1980s. Conventional fuel injection systems are typically connected to a pressurized fuel supply, and fuel injectors used in these fuel injection systems generally inject or otherwise release the pressurized fuel into the combustion chamber at a specific time relative to the power stroke of the engine. In many engines, and particularly in large engines, the size of the bore or port through which the fuel injector enters the combustion chamber is small. This small port accordingly limits the size of the components that can be used to actuate or otherwise inject fuel from the injector. Moreover, such engines also generally have crowded intake and exhaust valve train mechanisms, further restricting the space available for components of these fuel injection systems.
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Figure 1A is a cross-sectional side view of an integrated injector igniter configured in accordance with an embodiment of the disclosure. -
Figures 1B-1C are a series of cross-sectional end views of the injector ofFigure 1A taken substantially alonglines 1B-1B inFigure 1A . -
Figures 2A-2D are a series of cross-sectional side views of nozzle portions of injectors configured in accordance with embodiments of the disclosure. -
Figure 3A is a cross-sectional side view of a valve distribution subassembly, andFigure 3B is a plan partial view of a distribution assembly. - The present application incorporates by reference in its entirety the subject matter of U.S. Patent Application No. , entitled INTEGRATED FUEL INJECTOR IGNITERS HAVING FORCE GENERATING ASSEMBLIES FOR INJECTING AND IGNITING FUEL AND ASSOCIATED METHODS OF USE AND MANUFACTURE (Attorney Docket No. 69545.8068.US00), filed concurrently herewith on December 6, 2010.
- The present disclosure describes integrated fuel injection and ignition devices for use with internal combustion engines, as well as associated systems, assemblies, components, and methods regarding the same. For example, several of the embodiments described below are directed generally to adaptable fuel injectors/igniters that can inject two or more fuels, coolants, or combinations of fuels and coolants into a combustion chamber during operation. As used herein, the term coolant can include any fluid (e.g., gas or liquid) that produces cooling. In one embodiment, for example, a coolant can include non-combusting fluid. In other embodiments, however, a coolant can include a fuel that ignites and/or combusts at a lower temperature than another fuel. In certain other embodiments a fluid (e.g., a coolant) provides cooling of substances such as air or components of a combustion chamber. Certain details are set forth in the following description and in
Figures 1A-3D to provide a thorough understanding of various embodiments of the disclosure. However, other details describing well-known structures and systems often associated with internal combustion engines, injectors, igniters, and/or other aspects of combustion systems are not set forth below to avoid unnecessarily obscuring the description of various embodiments of the disclosure. Thus, it will be appreciated that several of the details set forth below are provided to describe the following embodiments in a manner sufficient to enable a person skilled in the relevant art to make and use the disclosed embodiments. Several of the details and advantages described below, however, may not be necessary to practice certain embodiments of the disclosure. - Many of the details, dimensions, angles, shapes, and other features shown in the Figures are merely illustrative of particular embodiments of the disclosure. Accordingly, other embodiments can have other details, dimensions, angles, and features without departing from the spirit or scope of the present disclosure. In addition, those of ordinary skill in the art will appreciate that further embodiments of the disclosure can be practiced without several of the details described below.
- Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Thus, the occurrences of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics described with reference to a particular embodiment may be combined in any suitable manner in one or more other embodiments. Moreover, the headings provided herein are for convenience only and do not interpret the scope or meaning of the claimed disclosure.
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Figure 1A is a cross-sectional side view of an integrated injector/igniter 100 ("injector 100") configured in accordance with an embodiment of the disclosure. Theinjector 100 includes abody 102 having amiddle portion 104 extending between a first end portion orbase portion 106 and a second end portion of anozzle portion 108. Thenozzle portion 108 is configured to at least partially extend through anengine head 110 to inject and ignite fuel at or near aninterface 111 of acombustion chamber 112. As described in detail below, theinjector 100 is particularly suited to provide adaptive and rapid actuation of two or more fuels, coolants, or combinations of fuels and coolants. - In the embodiment shown in
Figure 1A , theinjector 100 includes acore assembly 113 extending from thebase portion 106 to thenozzle portion 108. Theinjector 100 also includes abody insulator 142 coaxially disposed over at least a portion of thecore assembly 113. Thecore assembly 113 includes an ignition conduit, rod, orconductor 114, anignition insulator 116, and avalve 118. Theignition insulator 116 is coaxially disposed over at least a portion of theignition conductor 114 and extends from thebase portion 106 to thenozzle portion 108. As described in detail below, thevalve 118 is coaxially disposed over at least a portion of the ignition insulator and moves longitudinally through thebody 102. For example, thevalve 118 is an inwardly opening valve (e.g., opening in a direction away from the combustion chamber) and is movable relative to thecore insulator 114 to selectively introduce fuel from thenozzle portion 108 into thecombustion chamber 112. More specifically, thevalve 118 is configured to slide or otherwise move relative to thecore insulator 116 in directions that are generally parallel to a longitudinal axis of theinjector 100. Thevalve 118 includes a first end portion in thebase portion 106 that engages avalve operator assembly 125. Thevalve 118 also includes a second or sealingend portion 119 that engages or otherwise contacts avalve seal 121 in thenozzle portion 108 carried by thesecond ignition feature 150. The sealingend portion 119 also includes anexit opening 107 positioned radially inwardly from thevalve seal 121. As described in detail below, theexit opening 107 allows a fuel or coolant to pass from asecond flow passage 133 to be adjacent to thevalve seal 121, and when the sealingend portion 119 spaces apart from thevalve seal 121, the fuel or coolant can exit thenozzle portion 108. The sealingend portion 119 and/or thevalve seal 121 can include one or more elastomeric portions. As described in detail below, thevalve operator assembly 125 actuates thevalve 118 relative to theignition insulator 116 between an open position and a closed position (as shown inFigure 1A ). In the open position, thesealing end portion 119 of thevalve 118 is spaced apart from thevalve seal 121 to allow fuel or coolant to flow past thevalve seal 121 and out of thenozzle portion 108 to producedistribution pattern 160 as shown inFigure 1A . - In certain embodiments, the
valve 118 can be made from reinforced structural composites as disclosed inU.S. Patent Application No. 12/857,461, filed August 16, 2010 valve 118 can be made from relatively low density spaced graphite or graphene structures that provide the benefits of reducing inertia, achieving high strength and stiffness, and providing high fatigue endurance strength. More specifically, thevalve 118 can be constructed from a light weight but strong graphite structural core that is reinforced by one or more carbon-carbon layers. The carbon-carbon layer(s) may be prepared from a suitable precursor application of carbon donor (e.g., petroleum pitch or a thermoplastic such as a polyolefin or PAN). The one or more carbon-carbon layers can further provide radio frequency shielding and protection. Additional protection may be established by plating the outer surface of thevalve 118 with a suitable alloy, such as a nickel alloy that may be brazed to thevalve 118 by a suitable braze alloy composition. - The
ignition conductor 114 includes anend portion 115 proximate to theinterface 111 of thecombustion chamber 112 that includes one or more ignition features that are configured to generate an ignition event. Theignition conductor 114 also includes a first flow passage orchannel 124 extending longitudinally through a central portion of theignition conductor 114. Theignition conductor 114 is operably coupled to afirst terminal 127 at thebase portion 106. Thefirst terminal 127 is configured to supply ignition energy (e.g., voltage), as well as a first fuel or first coolant, to theignition conductor 114. More specifically, thefirst terminal 127 includes afirst inlet passage 123 that is fluidly coupled to thefirst flow channel 124. Thefirst terminal 127 is also configured to be coupled to a first fuel or coolant source, as described in detail below, to introduce the first fuel or coolant into thefirst flow channel 124 via thefirst inlet passage 123. Theignition conductor 114 therefore dispenses the first fuel or coolant into thecombustion chamber 112 via thefirst flow channel 124. Thefirst terminal 127 is also coupled to a first ignition energy source via a firstignition source conductor 129. The firstignition source conductor 129 accordingly provides first ignition energy to theignition conductor 114 via thefirst terminal 127. Theignition conductor 114 can therefore ignite the first fuel at thenozzle portion 108 with the first ignition energy. In one embodiment, for example, thefirst terminal 127 can supply at least approximately 80KV (DC or AC) to theignition conductor 114. In other embodiments, however, thefirst terminal 127 can supply a greater or lesser voltage to theignition conductor 114. - According to features of the illustrated embodiment, the first flow channel or
passage 124 is electrically isolated or insulated from the second flow channel orpassage 133. This electrical isolation allows for different ignition energies to be applied to the different fuels that flow through these passages. Moreover, and as described in detail below, thesecond flow passage 133 can include multiple discrete or fluidly separated channels or passages (see, e.g.,Figures 1C and 1D ). As such, different fuels and/or coolants can be separately transmitted through thesecond flow passage 133, in addition to different fuels and/or coolants that pass through the first flow channel orpassage 124. More specifically, in one embodiment, a first fuel or first coolant can flow through thefirst flow passage 124, a second fuel or second coolant can flow through a first discrete channel in thesecond flow passage 133, and a third fuel or third coolant can flow through a second discrete channel in thesecond flow passage 133. In still further embodiments, more than three fuels or three coolants can flow through the various flow channels. - The
injector 100 further includes an insulatedsecond terminal 152 at themiddle portion 104 or at thebase portion 106. Thesecond terminal 152 is electrically coupled to thesecond ignition feature 150 via asecond ignition conductor 154. For example, thesecond ignition conductor 154 can be a conductive layer or coating disposed on theignition insulator 116. Thesecond ignition conductor 154 accordingly transmits the ignition energy (e.g., voltage) to thesecond ignition feature 150 at thenozzle portion 108. As shown in the illustrated embodiment, thesecond ignition feature 150 is coaxial and radially spaced apart from theend portion 115 of theignition conductor 114. Moreover, in the illustrated embodiment, the second ignition features 150 can include a plurality of threads or acicular protrusions extending circumferentially around and spaced apart from theend portion 115 of theignition conductor 114. In other embodiments, however, thesecond terminal 152 can be omitted and ignition energy can be supplied to the second ignition feature from a force generator assembly carried by thebase portion 106. - The
injector 100 further includes an energy storage provision such ascapacitor 158 carried by thebody 102. In the illustrated embodiment, thecapacitor 158 is positioned in thebody insulator 142 at themiddle portion 104. In other embodiments, however, thecapacitor 158 can be positioned at other locations, including for example, at or near thenozzle portion 108. Thecapacitor 158 is configured to provide ignition energy to ignite one or more fuels. For example, thecapacitor 158 is coupled to thesecond ignition conductor 154. The capacitor can be charged by energy harvested from thecombustion chamber 112 or from another suitable source. For example, the capacitor can be charged with and store ignition energy from photovoltaic, thermoelectric, acoustical, and/or pressure energy harvested from thecombustion chamber 112. - According to features of the illustrated embodiment, the
injector 100 is configured to provide different amounts or values of ignition energy as needed to ignite the corresponding fuels or coolants. For example, in one embodiment thefirst terminal 129 can provide a greater ignition energy than ignition energy from thesecond terminal 152, induced ignition energy in theforce generator assembly 128, and/or stored ignition energy from thecapacitor 158 for the purpose of initiating ignition of fuels that are relatively difficult to ignite. In other embodiments, however, these additional ignition energy sources can provide the greater ignition energy. Moreover, any of these ignition energy sources can be used for the purpose of sustaining the ignition event. - According to additional features of the illustrated embodiment, the
injector 100 also includes a second flow passage orchannel 133. In the illustrated embodiment, thesecond flow channel 133 extends longitudinally through thebody 102 from thebase portion 106 to thenozzle portion 108. More specifically, thesecond flow channel 133 extends coaxially with the stem portion of thevalve 118 and is spaced radially apart from the stem portion of thevalve 118. As explained in detail below, a second fuel or coolant can enter thesecond flow channel 133 from thebase portion 106 of theinjector 100 to pass to thecombustion chamber 112. As also explained in detail below, thesecond flow channel 133 can include multiple discrete sub-channels or passages that are fluidly separated from one another, and that are coupled to corresponding individual fuel inlet passages 151 (identified individually as afirst inlet passage 151 a and asecond inlet passage 151b). As such, multiple different second fuels and/or second coolants can travel through the corresponding sub-channels of thesecond flow passage 133. - The
injector 100 can also include one or more sensors that are configured to detect properties or conditions in thecombustion chamber 112. For example, in the illustratedembodiment injector 100 includes sensors orfiber optic cables 117 extending longitudinally through thebody 102 from thebase portion 106 to thenozzle portion 108. Thefiber optic cables 117 can be coupled to or otherwise extend along with theignition conductor 114. Moreover, thefiber optic cables 117 can be coupled to one or more controllers orprocessors 122 carried by thebody 102. In the illustrated embodiment, thefiber optic cables 117 expand or otherwise fan radially outwardly at thenozzle portion 108 in the space between theignition conductor 114 and the second ignition features 150. The expanded end portion of the fiber optic and/orother sensor cables 117 provides an increased area for thefiber optic cables 117 to gather information at the interface with thecombustion chamber 112. - In addition to the
valve operator assembly 125, theinjector 100 also includes aforce generator assembly 128 carried by thebase portion 106. Thevalve operator assembly 125 is operably coupled to thevalve 118 and configured to move thevalve 118 between the open and closed positions in response to theforce generator assembly 128. For example, thevalve operator assembly 125 moves thevalve 118 longitudinally in theinjector 100 relative to theignition insulator 116. Thevalve operator assembly 125 includes at least an actuator ordriver 120 that is coupled to thevalve 118. Theforce generator assembly 128 includes a force generator 126 (e.g., an electric, electromagnetic, magnetic, etc. force generator) that induces movement of thedriver 120. - In certain embodiments, for example, the
force generator 126 can be a solenoid that induces a magnetic field to move aferromagnetic driver 120. In still further embodiments, theforce generator assembly 128 can include two or more solenoid windings acting as a transformer for the purpose of inducing movement of thedriver 120 and generating ignition energy. More specifically, aforce generator assembly 128 having two ormore force generators 126 can be configured to control fuel flow by opening any of the valve assemblies, and to produce of ionizing voltage upon completion of the valve opening function. To achieve both of these functions, in certain embodiments, for example, eachforce generator assembly 128 can be a solenoid winding including a first or primary winding and a secondary winding. The secondary winding can include more turns than the first winding. Each winding can also include one or more layers of insulation (e.g., varnish or other suitable insulators), however the secondary winding may include more insulating layers than the first winding. By configuring aforce generator 126 as a transformer with a primary winding and a secondary winding of many more turns, the primary winding can carry high current upon application of voltage to produce pull or otherwise induce movement of thedriver 120. Upon opening the relay to the primary winding, thedriver 120 is released and a very high voltage will be produced by the secondary winding. The high voltage of the secondary winding can be applied to the plasma generation ignition event by providing the initial ionization, after which relatively lower voltage discharge of a capacitor that has been charged with any suitable source (including energy harvested from thecombustion chamber 112 by photovoltaic, thermoelectric, and piezoelectric generators) and/or continue to supply ionizing current and thrust of fuel into the combustion chamber. Suitableforce generating assemblies 128 are described in U.S. Patent Application No. , entitled INTEGRATED FUEL INJECTOR IGNITERS HAVING FORCE GENERATING ASSEMBLIES FOR INJECTING AND IGNITING FUEL AND ASSOCIATED METHODS OF USE AND MANUFACTURE (Attorney Docket No. 69545.8068.US00), filed concurrently herewith on December 6, 2010, and incorporated by reference in its entirety. In embodiments where theforce generator assembly 128 includes two or more solenoid windings to induce movement of thedriver 120 and generate ignition energy for thesecond ignition feature 150, thesecond terminal 152 can be omitted from theinjector 100. - The
force generator 128 can also be operably coupled to the processor orcontroller 122, which can in turn also be coupled to the one or morefiber optic cables 117 extending through theignition conductor 114. As such, thecontroller 122 can selectively energize or otherwise activate theforce generator 126, for example, in response to one or more combustion chamber conditions or engine parameters. When theforce generator 126 actuates thedriver 120, thedriver 120 engages one ormore stops 130 integrally formed with or otherwise attached to the first end portion of thevalve 118 to move thevalve 118 between the open and closed positions. Thevalve operator assembly 125 can also include afirst biasing member 132 that contacts thevalve 118 and at least partially urges thevalve 118 to the closed position in a direction toward thenozzle portion 108. Thevalve operator assembly 125 can further include asecond biasing member 135 that at least partially urges thedriver 120 toward thenozzle portion 108. In certain embodiments, thefirst biasing member 132 can be a spring, such as a coil spring, and thesecond biasing member 135 can be a magnet or a permanent magnet. In other embodiments, however, thefirst biasing member 132 and thesecond biasing member 135 can include other components suitable for providing a biasing force against thevalve 118 and thedriver 120. Embodiments including a magnet or permanent magnet for the second biasing member can provide for relatively fast or quick actuation while inducing or avoiding potential resonance associated with coil springs. - In operation, the
injector 100 is configured to inject two or more fuels, coolants, and/or combinations of fuels and coolants into thecombustion chamber 112. Theinjector 100 is also configured to ignite the fuels as the fuels exit thenozzle portion 108 into the combustion chamber. For example, a first fuel or coolant can be introduced into thefirst flow passage 124 in theignition conductor 116 via thefirst inlet passage 123 in thefirst terminal 127. Precise amounts of fuel and/or coolant can be metered from a pressurized fuel source from a valve assembly as described in detail below. The first fuel or coolant travels through theinjector 100 from thebase portion 106 to thenozzle portion 108. In instances where thenozzle portion 108 dispenses metered amounts of a pressurized first fuel, the firstignition source conductor 129 can energize or otherwise transmit ignition energy (e.g., voltage) to an ignition feature carried by theignition conductor 116 at thenozzle portion 108. As such, theignition conductor 116 can ignite the first fuel at theinterface 111 with thecombustion chamber 112. - A second fuel or coolant can be introduced into the
base portion 106 via theforce generator assembly 128. For example, a second fuel or coolant can enter theforce generator assembly 128 via thesecond inlet passage 151 b. The second fuel or coolant can travel from the second inlet passage 151 through theforce generator 128 as indicated by baseportion flow paths 139. The second fuel or coolant exits theforce generator 128 throughmultiple exit channels 140 and then passes throughpassages 157 in thedriver 120 to reach thesecond flow channel 133 extending longitudinally adjacent to thevalve 118. As noted above, thesecond flow channel 133 extends between an outer surface of thevalve 118 and an inner surface of thebody insulator 142 of themiddle portion 104 and thenozzle portion 108. Thebody insulator 142 can be made from a ceramic or polymer insulator suitable for containing the high voltage developed in theinjector 100, as disclosed in the patent applications incorporated by reference in their entireties above. - The
valve operator assembly 125 and theforce generator assembly 128 work in combination to precisely and/or adaptively meter or dispense the second fuel or coolant into thesecond flow channel 133 and past the sealinghead 119 of thevalve 118. For example, theforce generator 126 induces movement of thedriver 120 to move thevalve 118 longitudinally along thecore insulator 116 to space the sealingend portion 119 of thevalve 118 away from thevalve seal 121. More specifically, when theforce generator 126 induces the movement of thedriver 120, thedriver 120 moves a first distance D1 prior to contacting thestop 130 carried by thevalve 118. As such, thedriver 120 can gain momentum or kinetic energy before engaging thevalve 118. After thedriver 120 contacts thestop 130, thedriver 120 continues to move to a second or total distance D2 while engaging thevalve 118 to exert a tensile force on thevalve 118 and move thevalve 118 to the open position. As such, when thevalve 118 is in the open position, the sealinghead 119 of thevalve 118 is spaced apart from thevalve seal 121 by an open distance generally equal to the second or total distance D2 minus the first distance D1. As thevalve 118 moves between the open and closed positions in directions generally parallel with a longitudinal axis of theinjector 100, theignition conductor 114 and theinsulator 116 remain stationary within thebody 102. Theinsulator 116 therefore acts as a central journal bearing for thevalve 118 and can accordingly have a low friction outer surface that contacts thevalve 118. Moreover, and as discussed in detail below, thesecond ignition feature 150 can create an ignition event to ignite the second fuel before or as the second fuel enters thecombustion chamber 112. - As the second fuel flows toward the
combustion chamber 112 through thesecond flow channel 133, thesecond ignition conductor 150 conveys DC and/or AC voltage to adequately heat and/or ionize and rapidly propagate and thrust the fuel toward the combustion chamber. In certain embodiments, theforce generator assembly 128 can provide the ignition energy to thesecond ignition feature 150 via thesecond ignition conductor 154. For example, in embodiments where theforce generator assembly 128 includes a primary solenoid winding or piezoelectric component that induces movement of thedriver 120 and also induces voltage in a secondary solenoid winding, the secondary solenoid winding can provide the ignition energy to the second ignition feature. In other embodiments, however, thesecond terminal 152 can provide the ignition energy to thesecond ignition feature 150 via thesecond ignition conductor 154. - With respect to the first ignition features at the
end portion 115 of theignition conductor 114, as well as thesecond ignition feature 150, each ignition feature can develop plasma discharge blasts of ionized fuel that is rapidly accelerated and injected into thecombustion chamber 112. Generating such high voltage at the ignition features initiates ionization, which is then rapidly propagated as a much larger population of ions in plasma that develops and travels outwardly to thrust fuel past theinterface 111 into thecombustion chamber 112 into surplus air to provide insulation of more or less adiabatic stratified chamber combustion. As such, theinjector 100 is capable of ionizing air within thenozzle portion 108 prior to introducing fuel into the ionized air, ionizing fuel combined with air, as well as layers of ionized air without fuel and ionized fuel and air combinations, as disclosed in the patent applications incorporated by reference in their entireties above. - In one mode of operation, delivery of a rapid combustant such as hydrogen or hydrogen-characterized fuel mixture is made through inlet port 151 and
past valve seal 119 to be ignited with relatively low ignition energy byelectrode 150. Such rapid combustion as depicted bydistribution pattern 160 thereby rapidly heats and forces rapid evaporation, cracking and completion of combustion of other fuels such as liquid diesel fuel that can be delivered through thesecond inlet port 123 and throughconduit 124 to produce asecond distribution pattern 162. Thesecond distribution pattern 162 can be different than thefirst distribution pattern 160. This mode of rapid-combustant characterized operation enables other commensurately delivered fuels with relatively difficult ignition characteristics and/or tendencies to produce unburned hydrocarbon and/or particulate emissions including diesel and bunker fuels to be readily combusted without such emissions including applications in engines with insufficient compression ratios, fuel pressure, or operating temperature to provide satisfactory compression ignition. - In another mode of operation, fuel selections such as diesel and bunker fuels that normally produce such objectionable emissions are delivered through the
second inlet 123 toconduit 124 for injection that is characterized by ionization by heat and/or plasma formation as a result of sufficiently greater ignition energy delivery throughelectrical lead 129 to force rapid evaporation, cracking and completion of combustion without such emissions. Application of such ignition energy enables clean utilization of fuels with insufficient cetane ratings for compression ignition and applications in engines with insufficient compression ratios, fuel pressure, or operating temperature to provide satisfactory compression ignition. -
Figure 1B is a cross-sectional end view of an embodiment of asecond injector 100b taken substantially alonglines 1 B-1 B inFigure 1A . More specifically, the embodiment shown inFigure 1A illustrates the concentric or coaxial arrangement of several of the components of theinjector 100. However, for clarity the tubular cross section ofvalve 118 is not illustrated inFigure 1B . In the illustrated embodiment, thesecond injector 100b includes acasing 159, such as a metallic or steel casing disposed over thebody insulator 142. Thesecond flow channel 133 is positioned radially outwardly from the valve andsecond ignition conductor 154, and theignition insulator 116 is positioned radially inwardly from the valve andsecond ignition conductor 154. Thefiber optic cables 117 are adjacent to the ignition conductor, and thefirst flow channel 124 extends through the ignition conductor. In the illustrated embodiment, thesecond flow channel 133 has a generally circular cross-sectional shape. In other embodiments, and as described below, thesecond flow channel 133 can include shapes other than circular and/or includes multiple sub-channels or discrete separated sub-portions for flowing various different fuels and/or coolants. -
Figure 1C is a cross-sectional end view of athird injector 100c taken substantially alonglines 1 B-1 B inFigure 1A . The embodiment of thethird injector 100c shown inFigure 1C illustrates several second flow sub-channels 133 (identified individually as first throughnth sub-channels 133a-133n) between thebody insulator 142 and the combination of thesecond ignition conductor 154 and second valve 118 (for clarity, the tubular cross-section ofvalve 118 is not illustrated inFigure 1C ). Although the illustrated embodiment includes second flow sub-channels 133 forming a star or gear shaped pattern, in other embodiments these flow channels can have other configurations. For example,Figure 1D illustrates an additional embodiment of afourth injector 100d having multiple discrete or separate second flow sub-channels 133 (identified individually as first throughnth sub-channels 133a-133n) forming a generally pentagonal shape (for clarity, the tubular cross section ofvalve 118 is not illustrated inFigure 1 D) . In other embodiments, however, the second flow sub-channels 133 can be arranged in other shapes or configurations. -
Figures 2A-2D are a series of cross-sectional side views of nozzle portions 214 of injectors configured in accordance with embodiments of the disclosure. The embodiments illustrated inFigures 2A-2D are configured to provide various spray patterns or distributions of fuels and/or coolants. For example, these embodiments provide examples of spray or distribution patterns that can be used to optimize combustion chamber conditions, such as temperature, pressure, completion of the combustion event, etc. InFigure 2A , for example, afirst nozzle portion 214a includes afirst end portion 215a that dispenses or disperses a first injection ordistribution pattern 260a into a combustion chamber. More specifically, thefirst end portion 215a can have one or more openings that create thefirst distribution pattern 260a. Thefirst distribution pattern 260a can have a generally uniform expanding shape (e.g., cone-shaped). In certain embodiments, thefirst injection pattern 260a is suitable for a symmetrical combustion chamber. - In
Figure 2B , asecond nozzle portion 214b includes a radially expandingsecond sleeve valve 262b covering at least a portion of asecond end portion 215b. Thesecond sleeve valve 262b is configured to open, expand, slide, or otherwise actuate in response to pressurized fuel and/or in response to one or more actuating devices. In one embodiment, thesecond sleeve valve 262b at least partially covers one or moresecond exit openings 266b in thesecond end portion 215b. Thesecond nozzle portion 214b also includes a second end stop or plug 264b at least partially blocking the flow of fuel or coolant out of thesecond end portion 215b. As such, thesecond exit openings 266b are configured to allow the fuel or coolant to exit thesecond end portion 215b in a second injection ordistribution pattern 260b. Thesecond distribution pattern 260b accordingly includes a central void generally surrounded by a radially expanding cone shape of injected fuel and/or coolant. - In
Figure 2C , athird nozzle portion 214c includes a radially expandingsleeve valve 262c covering at least a portion of athird end portion 215c. Thethird sleeve valve 262c is configured to open, slide, or otherwise expand or actuate in response to pressurized fuel and/or in response to one or more actuating devices. Thethird sleeve valve 262c at least partially covers one or morethird exit openings 266c in thethird end portion 215c. Thethird nozzle portion 214c also includes a third end stop or plug 264c at least partially blocking the flow of fuel or coolant out of thethird end portion 215c. In the illustrated embodiment, however, the third plug 264c has a generally conical shape that is inserted into an expanded section of thethird end portion 215c. As such, thethird exit openings 266c are configured to allow the fuel or coolant to exit thethird end portion 215c in a third injection ordistribution pattern 260c. Thethird distribution pattern 260c accordingly includes a conically-shaped radially expanding central void generally surrounded by a corresponding radially expanding cone shape of injected fuel and/or coolant. - In
Figure 2D , afourth nozzle portion 214d includes a radially expandingsleeve valve 262d covering at least a portion of afourth end portion 215d. Thefourth sleeve valve 262d is configured to open, slide, or otherwise expand or actuate in response to pressurized fuel and/or in response to one or more actuating devices. Thefourth sleeve valve 262d at least partially covers one or morefourth exit openings 266d in thefourth end portion 215d. Thefourth nozzle portion 214d also includes a fourth end stop or plug 264d at least partially blocking the flow of fuel or coolant out of thefourth end portion 215d. In the illustrated embodiment, however, thefourth plug 264d has a generally conical shape that is inserted into an expanded section of thefourth end portion 215d. As such, thefourth exit openings 266d are configured to allow the fuel or coolant to exit thefourth end portion 215d in a fourth injection ordistribution pattern 260d. Thefourth distribution pattern 260d accordingly includes a converging central void generally surrounded by a corresponding radially expanding cone shape of injected fuel and/or coolant. - The embodiments described above with reference to
Figures 2A-2D can accordingly provide various fuel and/or coolant distribution patterns (e.g., focused patterns, evenly distributed patterns, etc.) suitable for various ignition and cooling needs. One of ordinary skill in the art will appreciate, however, that the embodiments described above with reference toFigures 2A-2D are not exhaustive of all of the different configurations for various fuel distribution patterns. For example, the size, shape, orientation, and/or distribution of the exit openings 266 in the corresponding second end portions 215 can provide desired distribution patterns. In certain embodiments, a single nozzle portion 214 can include exit openings 266 having different sizes, shapes, and/or orientations. Moreover, these individual exit openings 266 can provide an outlet for corresponding individual flow channels or passages. Accordingly, a first fuel or first coolant can be dispensed through a first flow channel and corresponding exit opening 266 to provide a first distribution or spray pattern in the combustion chamber. In addition, a second fuel or second coolant can be dispensed through a second flow channel and corresponding exit opening 266 to provide a second distribution or spray pattern in the combustion chamber that is different from the first distribution pattern. Additional fuels and/or coolants can be dispensed through corresponding additional flow channels and exit openings. -
Figure 3A is a cross-sectional side view of a valve distribution subassembly 360 ("subassembly 360") that can be operably coupled to thefirst terminal 127 to deliver a first fuel or a first coolant to the injector 100 (as shown inFigure 1A ) from a pressurized fuel source. Thesubassembly 360 reliably enables control of the delivery of pressurized supplies of various fuels and/or coolants. According to aspects of this disclosure, thesubassembly 360 is particularly beneficial for enabling various fuels including very low energy density fuels to be utilized in large engines in conjunction with an injector as described herein. Thesubassembly 360 also enables such fuels or coolants to be partially utilized to greatly improve the volumetric efficiency of converted engines by increasing the amount of air that is induced into the combustion chamber during each intake cycle. Although thesubassembly 360 is described below in operation with reference to a fuel, in other application embodiments thesubassembly 360 can dispense various coolants. - In operation, pressurized fluid such as a fuel is supplied through inlet fitting 362 to the valve chamber shown where a biasing member 364 (e.g., coil spring) urges a valve 366 (e.g., ball valve) toward a closed position on a
valve seat 368 as shown inFigure 3A . In high-speed engine applications, or wherespring 364 is objectionable because solids in slush fuels tend to build up, it may be preferred to providevalve seat 368 as a pole of a permanent magnet to assist in rapid closure of theball valve 366. When fuel delivery to a combustion chamber is desired, an actuator or push-rod 372 forces theball valve 366 to lift off of thevalve seat 368 to permit fuel to flow around theball valve 366 and through the passageway to fitting 370 for delivery to the combustion chamber, such as through thefirst terminal 127 of the injector 100 (Figure 1A ). In certain embodiments, thepush rod 372 can be sealed by closely fitting within abore 390, or by an elastomeric seal such as an O-ring 374. The actuation ofpush rod 372 can be by any suitable method or combination of methods. - According to one embodiment, suitable control of fuel or coolant flow can be provided by solenoid action resulting from the passage of an electrical current through an annular winding 386 within a
steel cap 384 in which asolenoid plunger 378 moves axially with connection to thepush rod 372, as shown. In certain embodiments theplunger 378 can be made from a ferromagnetic material that is magnetically soft. Moreover, theplunger 378 can be guided in linear motion by asleeve bearing 388, which can be a self-lubricating polymer, or low friction alloy, such as a Nitronic alloy, or a permanently lubricated powder-metallurgy oil-impregnated bearing that is threaded, engaged with an interference fit, locked in place with a suitable adhesive, swaged, or braised to be permanently located on theferromagnetic pole piece 390. - In other embodiments, the
ball valve 366 may also be opened by an impulse action in which theplunger 378 is allowed to gain considerable momentum before providing considerably higher opening force after it is allowed to move freely prior to suddenly causingactuator pin 372 to strike theball valve 366. In this embodiment, it may be preferred to provide sufficient "at rest" clearance between theball valve 366 and the end of thepush rod 372 when theplunger 378 is in the neutral position at the start of acceleration towards theball valve 366 to thereby allow considerable momentum to be developed before thepush rod 372 suddenly impacts theball valve 366. - As an alternative method for intermittent operation of the
push rod 372 and theball valve 366 can be with a rotary solenoid or mechanically driven cam displacement that operates at the same frequency that controls the air inlet valve(s) and/or the power stroke of the engine. Such mechanical actuation can be utilized as the sole source of displacement forball valve 366 or in conjunction with a push-pull or rotary solenoid. In operation, for example, aclevis 380 holds aball bearing assembly 382 in which a roller or the outer race of an antifriction bearing assembly rotates against or over a suitable cam to cause linear motion of theplunger 378 and thepush rod 372 toward theball valve 366. After striking theball valve 366 for development of fuel flow as desired, theball valve 366 andplunger 378 are returned to the neutral position by themagnetic seat 364 and/or a biasing member 376 (e.g., coil spring). - It is similarly contemplated that suitable operation of
unit valve 360 may be by cam displacement of 382 with "hold-open" functions by a piezoelectric operated brake (not shown) or by actuation ofelectromagnet 386 that is applied toplunger 378 to continue the fuel or coolant flow period after passage of the cam lobe against 382. This provides fluid flow valve functions in which a moveable valve element such as 366 is displaced byplunger 372 that is forced by suitable mechanisms including a solenoid, a cam operator, and a combination of solenoid and cam operators in which thevalve element 366 is occasionally held in position for allowing fluid flow by such solenoid, a piezoelectric brake, and/or a combination of solenoid and piezoelectric mechanisms. - Fuel and/or coolant flow from
unit valve 360 may be delivered to the engine's intake valve port, to a suitable direct cylinder fuel injector, and/or delivered to an injector having selected combinations of the embodiments described herein. In some applications such as large displacement engines it is desirable to deliver fuel to all three entry points. In instances that pressurized fuel is delivered by timed injection to the inlet valve port of the combustion chamber during the time that the intake port or valve is open, increased air intake and volumetric efficiency is achieved by imparting fuel momentum to cause air-pumping for developing greater air density in the combustion chamber. - In such instances the fuel is delivered at a velocity that considerably exceeds the air velocity to thus induce acceleration of air into the combustion chamber. This advantage can be compounded by controlling the amount of fuel that enters the combustion chamber to be less than would initiate or sustain combustion by spark ignition. Such lean fuel-air mixtures however can readily be ignited by fuel injection and ignition by the injector embodiments described herein, which provides for assured ignition and rapid penetration by combusting fuel into the lean fuel-air mixture developed by timed port fuel injection.
- Additional power may be provided by direct cylinder injection through a separate direct fuel injector that adds fuel to the combustion initiated by an injector such as the
injector 100 described above with reference toFigure 1A . Direct injection from one or more separate direct cylinder injectors into combustion initiated by the injector assures rapid and complete combustion within excess air and avoids the heat loss usually associated with separate direct injection and spark ignition components that require the fuel to swirl, ricocheting and/or rebounding from combustion chamber surfaces and then to combust on or near surfaces around the spark ignition source. - In larger engine applications, for high speed engine operation, and in instances that it is desired to minimize electrical current requirements and heat generation in
solenoid 386 it is particularly desirable to combine mechanical cam actuated motion with solenoid operation ofplunger assembly plunger 378 to be provided by a shaft cam. After the initial valve action ofball 366 is established by cam action for fuel delivery adequate for idle operation of the engine, increased fuel delivery and power production is provided by increasing the delivery pressure and/or "hold-on time" by continuing to hold plunger againststop 390 as a result of creating a relatively small current flow in annular solenoid winding 386. Thus, assured valve operation and precise control of increased power is provided by prolonging the hold-on time ofplunger 378 by solenoid action following quick opening ofball 366 by cam action. -
Figure 3B is a plan partial view of adistribution assembly 391 configured in accordance with an embodiment of the disclosure. According to aspects of the disclosure, engines with multiple combustion chambers are provided with precisely timed delivery of fuel and/or coolant by thearrangement subassemblies 360 in theassembly 391 as shown in the schematic fuel control circuit layout ofFigure 3B . In this illustrative instance, sixsubassemblies 360 are located at equal angular spacing within ahousing 394. Thehousing 394 provides conduits for pressurized fuel to eachsubassembly inlet 395 through amanifold 393. A cam on a rotating camshaft intermittently actuates correspondingpush rod assemblies 397 to provide for precise flow of fuel frominlet 395 to acorresponding outlet 396, which in turn delivers to the fuel or coolant the desired intake valve port and/or combustion chamber directly or through the injector as shown inFigure 1A . In certain embodiments, thehousing 394 is preferably adaptively adjusted with respect to an angular position relative to the cam to provide spark and injection advance in response to adaptive optimization algorithms provided by acontroller 392 as shown. - In certain embodiments, the
controller 392 can provide adaptive optimization of each combustion chamber's fuel-delivery and spark-ignition events as a further improvement in efficiency, power production, operational smoothness, fail-safe provisions, and longevity of engine components. Moreover, thecontroller 392 can record sensor indications including the angular velocity of the cam to determine the time between each cylinder's torque development to derive positive and negative engine acceleration as a function of adaptive fuel-injection and spark-ignition data in order to determine adjustments needed for optimizing desired engine operation outcomes. For example, it is generally desired to produce the greatest torque with the least fuel consumption. However, in areas such as congested city streets where oxides of nitrogen emissions are objectionable, adaptive fuel injection and ignition timing provides maximum torque without allowing peak combustion temperatures to reach 2,200°C (4,000°F). This can be achieved by the disclosure of embodiments described in detail herein. - The fuels and/or coolants that are supplied to the injectors disclosed herein can be stored in any suitable corresponding storage containers. Moreover, these fuels or coolants can be pressurized to aid in the adaptive delivery of these fuels and/or coolants. In one embodiment, these fuels or coolants can be pressurized in the storage container without the use of a pump. For example, one or more chemical reactions can be controlled or otherwise allowed to occur to pressurize the corresponding fuels or coolants. More specifically, in certain embodiments, the storage container can be configured to store a pressurizing substance such as hydrogen, propane, or ammonia over diesel fuel. As such, in one embodiment the propane can be used as an expansive fluid by changing phase in response to energy that is added to the propane to produce propane vapor and consequently pressurize the diesel fuel storage vessel. In other embodiments, liquid hydrogen can be added to diesel fuel storage vessel. The liquid hydrogen can accordingly remove heat from the diesel fuel and pressurize the diesel fuel. Moreover, in still further embodiments ammonia or mothballs can be added to a fuel or coolant to accordingly dissociate and pressurize the fuel or coolant. Although several illustrative embodiments are disclosed above, one of ordinary skill in the art will appreciate that these are non-limiting embodiments and that various other processes and reactions including controlled gas releases from hydride or adsorptive media are suitable for pressurizing the fuel or coolant can be used.
- According to additional features of the embodiments disclosed herein, injectors having the features described above can be used to inject and ignite fuels at relatively low pressures. For example, in one embodiment, such injectors can be used for operating conditions that do not exceed approximately 10 to 15 atmospheres (150 to 300 psi) over the max compression pressure of the engine. In other embodiments, however, these injectors can be used for operating conditions that are less than or that exceed approximately 150 to 300 psi over the max compression pressure of the engine. Accordingly, these injectors provide positive ignition and can be adaptively used for fuels that do not have a cetane rating requirement for the fuels.
- According to yet additional features of the embodiments described above, the injectors are particularly suited to adaptively control the injection and ignition of various fuels and/or coolants. For example, the separate and electrically isolated first and second flow passages allow for different fuels to be injected and ignited. Moreover, these passages can produce different distribution or spray patterns of the fuels or coolants in the combustion chamber. What's more, the multiple discrete channels in the second flow passage can provide further adaptability or variation for the delivery, distribution, and/or ignition of various fuels and coolants. Injectors configured in accordance with embodiments of the disclosure can further be configured to adaptively adjust fuel/coolant delivery and/or ignition based at least upon the valve assembly operation, ignition energy transfer and/or operation, the type of fuel or coolant injected, as well as the pressure or temperature of the fuel or coolant that is injected.
- In certain embodiment, an injector configured in accordance with an embodiment of the disclosure includes an injector body having a base portion configured to receive a first fuel and at least one of a second fuel and a coolant into the body, and a nozzle portion coupled to the base portion. The nozzle portion is configured to be positioned proximate to a combustion chamber for injecting the first fuel and at least one of the second fuel and the coolant into the combustion chamber. The injector can also include a valve seal positioned at or proximate to the nozzle portion, an ignition rod extending from the base portion to the nozzle portion, and a valve coaxially disposed over at least a portion of the ignition rod. The valve includes a sealing head that moves between an open position in which the sealing head is spaced apart from the valve seal, and a closed position in which the sealing head at least partially contacts the valve seal. The injector further includes a first flow channel extending longitudinally through a center portion of the ignition rod, and a second flow channel fluidly separated from the first flow channel and extending longitudinally through the body adjacent to the valve. The first flow channel is configured to deliver the first fuel to the nozzle portion, and the second flow channel is configured to deliver at least one of the second fuel and the coolant to the nozzle portion. The Injector further includes a first coupling fluidly coupled to the first flow channel to deliver the first fuel to the first flow channel, and a second coupling fluidly coupled to the second flow channel to deliver at least one of the second fuel and the coolant to the second flow channel.
- According to certain embodiments of this injector the first ignition energy is greater than the second ignition energy, the ignition feature is concentric with the ignition rod. Moreover, the injector can also include a pressurized fuel source operably coupled to the injector body, wherein the pressurized fuel source stores the first fuel above an ambient pressure. The pressurized fuel source can at least partially pressurize the first fuel without the aid of a pump, and the pressurized fuel source can comprise a storage container that stores the first fuel, and wherein the storage container contains a chemical reaction that at least partially pressurizes the first fuel. The injector can also include a capacitor carried by the injector body and configured to store ignition energy to ignite at least one of the first fuel and the second fuel, wherein the ignition energy is harvested from the combustion chamber. The injector can further include a third coupling fluidly coupled to the third flow channel to deliver at least one of the third fuel and the second coolant to the third flow channel, as well as an ignition energy conductor operably coupled to the ignition conductor via the first fuel inlet, as well as an ignition energy source carried by the body.. In certain embodiments, the first ignition energy is greater than the second ignition energy.
- A method of operating a fuel injector in accordance with embodiments of the disclosure includes introducing a first fuel into a first flow channel in a body of the injector, dispensing the first fuel from first flow channel into a combustion chamber, activating a first ignition feature to at least partially ignite the first fuel, introducing at least one of a second fuel and a coolant into a second flow channel in the body, wherein the second flow channel is fluidly separated from the first flow channel, and actuating a valve to dispense at least one of the second fuel and the coolant from the second flow channel into the combustion chamber. The method can also include activating a second ignition feature to at least partially ignite the second fuel after the valve dispenses the second fuel. The first flow channel can be electrically isolated from the second flow channel, and wherein activating the first ignition feature includes applying a first voltage to the ignition feature, and activating the second ignition feature includes activating a second voltage to the second ignition feature, the second voltage being less than the first voltage. Moreover, actuating the valve comprises energizing a solenoid winding to induce movement of the valve from a closed position to an open position. In addition, the solenoid winding is a first solenoid winding and wherein the method can further comprise inducing a voltage in a second solenoid winding proximate to the first solenoid winding, and transmitting the voltage to the second ignition feature. Moreover, actuating the valve to dispense at least one of the second fuel and the coolant comprises actuating the valve in response to a change in at least one operating condition. Furthermore, the operating condition comprises at least one of the following: an increased power requirement, a decreased power requirement, a combustion chamber temperature, a combustion chamber pressure, a combustion chamber light value, and a combustion chamber acoustical value. The method can also include adaptively controlling at least one of dispensing the first fuel and actuating the valve to dispense at least one of the second fuel and the coolant based on one or more detected combustion chamber properties. In addition, actuating the valve comprises actuating the valve to dispense the coolant in response to a predetermined temperature in the combustion chamber, and dispensing the first fuel from first flow channel into the combustion chamber comprises dispensing a first non-cetane rated fuel from first flow channel into the combustion chamber.
- The present application incorporates by reference in its entirety the subject matter of the following applications:
U.S. Provisional Application No. 61/237,466, filed August 27, 2009 U.S. Provisional Patent Application No. 61/407,437, filed October 27, 2010 U.S. Provisional Application No. 61/304,403, filed February 13, 2010 U.S. Provisional Application No. 61/312,100, filed March 9, 2010 U.S. Provisional Application No. 61/237,425, filed August 27, 2009 U.S. Provisional Application No. 61/237,479, filed August 27, 2009 U.S. Patent Application No. 12/841,170, filed July 21, 2010 U.S. Patent Application No. 12/804,510, filed July 21, 2010 U.S. Patent Application No. 12/841,146, filed July 21, 2010 U.S. Patent Application No. 12/841,149, filed July 21, 2010 U.S. Patent Application No. 12/841,135, filed July 21, 2010 U.S. Patent Application No. 12/804,509, filed July 21, 2010 U.S. Patent Application No. 12/804,508, filed July 21, 2010 U.S. Patent Application No. 12/581,825, filed October 19, 2009 U.S. Patent Application No. 12/653,085, filed December 7, 2009 U.S. Patent Application No. 12/006,774 (nowU.S. Patent No. 7,628,137), filed January 7, 2008 and titled MULTIFUEL STORAGE, METERING AND IGNITION SYSTEM;U.S. Patent Application No. 12/913,749, filed October 27, 2010 PCT/US09/67044, filed December 7, 2009 and titled INTEGRATED FUEL INJECTORS AND IGNITERS AND ASSOCIATED METHODS OF USE AND MANUFACTURE; and U.S. Patent Application No. , filed concurrently herewith on December 6, 2010, and titled: INTEGRATED FUEL INJECTOR IGNITERS HAVING FORCE GENERATING ASSEMBLIES FOR INJECTING AND IGNITING FUEL AND ASSOCIATED METHODS OF USE AND MANUFACTURE (Attorney Docket No. 69545-8068US). - From the foregoing, it will be appreciated that specific embodiments of the disclosure have been described herein for purposes of illustration, but that various modifications may be made without deviating from the spirit and scope of the invention. For example, the dielectric strength of the insulators disclosed herein may be altered or varied to include alternative materials and processing means. The actuators and drivers may be varied depending on fuel and/or the use of the corresponding injectors. Moreover, components of the injector may be varied including for example, the electrodes, the optics, the actuators, the valves, and the nozzles or the bodies may be made from alternative materials or may include alternative configurations than those shown and described and still be within the spirit of the disclosure.
- Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise," "comprising," and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in a sense of "including, but not limited to." Words using the singular or plural number also include the plural or singular number, respectively. When the claims use the word "or" in reference to a list of two or more items, that word covers all of the following interpretations of the word: any of the items in the list, all of the items in the list, and any combination of the items in the list. In addition, the various embodiments described above can be combined to provide further embodiments. All of the U.S. patents, U.S. patent application publications, U.S. patent applications, foreign patents, foreign patent applications and non-patent publications referred to in this specification and/or listed in the Application Data Sheet are incorporated herein by reference, in their entirety. Aspects of the disclosure can be modified, if necessary, to employ fuel injectors and ignition devices with various configurations, and concepts of the various patents, applications, and publications to provide yet further embodiments of the disclosure.
- These and other changes can be made to the disclosure in light of the above-detailed description. In general, in the following claims, the terms used should not be construed to limit the disclosure to the specific embodiments disclosed in the specification and the claims, but should be construed to include all systems and methods that operate in accordance with the claims. Accordingly, the invention is not limited by the disclosure, but instead its scope is to be determined broadly by the following claims.
-
- 1. An injector comprising:
- an injector body including -
- a base portion configured to receive a first fuel and at least one of a second fuel and a coolant into the body; and
- a nozzle portion coupled to the base portion, wherein the nozzle portion is configured to be positioned proximate to a combustion chamber for injecting the first fuel and at least one of the second fuel and the coolant into the combustion chamber;
- a valve seal positioned at or proximate to the nozzle portion;
- an ignition rod extending from the base portion to the nozzle portion;
- a valve coaxially disposed over at least a portion of the ignition rod, wherein the valve includes a sealing head and moves between an open position in which the sealing head is spaced apart from the valve seal, and a closed position in which the sealing head at least partially contacts the valve seal;
- a first flow channel extending longitudinally through a center portion of the ignition rod, wherein the first flow channel is configured to deliver the first fuel to the nozzle portion;
- a second flow channel fluidly separated from the first flow channel and extending longitudinally through the body adjacent to the valve, wherein the second flow channel is configured to deliver at least one of the second fuel and the coolant to the nozzle portion;
- a first coupling fluidly coupled to the first flow channel to deliver the first fuel to the first flow channel; and
- a second coupling fluidly coupled to the second flow channel to deliver at least one of the second fuel and the coolant to the second flow channel.
- an injector body including -
- 2. The injector of clause 1, further comprising an ignition feature proximate to the ignition rod at the nozzle portion, wherein second flow channel delivers at least one of the second fuel and the coolant past the second ignition feature.
- 3. The injector of clause 2 further comprising:
- a first ignition energy source coupled to the ignition rod for supplying a first ignition energy to ignite the first fuel; and
- a second ignition energy source coupled to the ignition feature for supplying a second ignition energy to ignite the second fuel.
- 4. The injector of clause 1 wherein the nozzle portion injects the first fuel in a first injection pattern into the combustion chamber, and the nozzle portion injects at least one of the second fuel and the coolant in a second injection pattern into the combustion chamber, and wherein the first injection pattern is different than the second injection pattern.
- 5. The injector of clause 1, further comprising a force generator assembly that one of fuels flows through force generator assembly that moves the valve between the open and closed positions, and wherein the second flow channel extends through at least a portion of the force generator assembly.
- 6. The injector of clause 1 wherein the valve moves longitudinally through the injector body as the valve moves between the open and closed positions to dispense at least one of the second fuel and the coolant from the second flow channel into the combustion chamber.
- 7. The injector of clause 1 , further comprising a third flow channel fluidly separate from the first flow channel and the second flow channel, and wherein the third flow channels is configured to deliver at least one of a third fuel and a second coolant to the nozzle portion.
- 8. An injector comprising:
- a body having a first end portion and a second end portion;
- a first flow channel extending through the body, wherein the first flow channel receives a first fuel;
- a second flow channel extending through the body, wherein the second flow channel is separate from the first flow channel and electrically isolated from the first flow channel, wherein the second flow channel receives at least one of a second fuel and a coolant; and
- a valve carried by the body, wherein the valve is movable between a closed position and an open position to introduce at least one of the second fuel and the coolant into a combustion chamber.
- 9. The injector of clause 8, further comprising an ignition conductor extending longitudinally through at least a portion of the body, wherein the first flow channel extends longitudinally through a central portion of the ignition conductor.
- 10. The injector of clause 8, further comprising:
- a first fuel inlet operably coupled to the first fuel flow channel; and
- a second fuel inlet operably coupled to the second fuel flow channel.
- 11. The injector of clause 8, further comprising a pressurized fuel source that stores the first fuel, wherein the first fuel is selectively introduced into the first fuel flow channel from the pressurized fuel source to introduce the first fuel into the combustion chamber.
- 12. The injector of clause 8 wherein the ignition conductor is a first ignition conductor, and wherein the injector further comprises a second ignition conductor at the second end portion of the body, wherein the first ignition conductor ignites the first fuel and the second ignition conductor ignites the second fuel.
- 13. The injector of clause 12, further comprising:
- a first ignition source coupled to the first ignition conductor to supply a first ignition energy; and
- a second ignition source coupled to the second ignition conductor to supply a second ignition energy.
- 14. A method of adaptively operating a fuel injector, the method comprising:
- introducing at least one of a first fuel and a first coolant into a first flow channel in a body of the injector;
- dispensing at least one of the first fuel and the first coolant from first flow channel into a combustion chamber in a first distribution pattern;
- introducing at least one of a second fuel and a coolant into a second flow channel in the body, wherein the second flow channel is fluidly separated from the first flow channel;
- dispensing at least one of the second fuel and the second coolant from the second flow channel into the combustion chamber in a second distribution pattern, wherein the second distribution pattern is different from the first distribution pattern; and
- when dispensing at least one of the first fuel and the second fuel, at least partially igniting the first fuel or the second fuel with an ignition feature carried by the body of the injector.
- 15. The method of clause 14, further comprising adaptively dispensing at least one of the first fuel, the second fuel, and the coolant in response to one or more combustion chamber properties.
- 16. The method of clause 14, further comprising:
- introducing at least one of a third fuel and a third coolant into a third flow channel in the body, wherein the third flow channel is fluidly separated from the first and second flow channels; and
- dispensing at least one of the third fuel and the third coolant from the third flow channel into the combustion chamber.
- 17. The method of clause 16 wherein dispensing at least one of the third fuel and the third coolant from the third flow channel into the combustion chamber comprises dispensing at least one of the third fuel and the third coolant into the combustion chamber in the second distribution pattern.
- 18. The method of clause 16 wherein dispensing at least one of the third fuel and the third coolant from the third flow channel into the combustion chamber comprises dispensing at least one of the third fuel and the third coolant into the combustion chamber in a third distribution pattern, and wherein the third distribution pattern is different from the first and second distribution patterns.
- 19. The method of clause 14 wherein at least partially igniting the first fuel or the second fuel with an ignition feature carried by the body of the injector comprises at least partially igniting the first fuel with a first ignition feature and at least partially igniting the second fuel with a second ignition feature different from the first ignition feature.
- 20. The method of clause 19 wherein at least partially igniting the first fuel comprises applying a first ignition energy to the first ignition feature, and at least partially igniting the second fuel comprises applying a second ignition energy to the second ignition feature, wherein the second ignition energy is greater than or less than the first ignition energy.
Claims (5)
- A method of adaptively operating a fuel injector, the method comprising:introducing at least one of a first fuel and a first coolant into a first flow channel in a body of the injector;dispensing at least one of the first fuel and the first coolant from first flow channel into a combustion chamber in a first distribution pattern;introducing at least one of a second fuel and a coolant into a second flow channel in the body, wherein the second flow channel is fluidly separated from the first flow channel;dispensing at least one of the second fuel and the second coolant from the second flow channel into the combustion chamber in a second distribution pattern, wherein the second distribution pattern is different from the first distribution pattern; andwhen dispensing at least one of the first fuel and the second fuel, at least partially igniting the first fuel or the second fuel with an ignition feature carried by the body of the injector.
- The method of claim 1, further comprising adaptively dispensing at least one of the first fuel, the second fuel, and the coolant in response to one or more combustion chamber properties.
- The method of claim 1, further comprising:introducing at least one of a third fuel and a third coolant into a third flow channel in the body, wherein the third flow channel is fluidly separated from the first and second flow channels; anddispensing at least one of the third fuel and the third coolant from the third flow channel into the combustion chamber.
- The method of claim 3 wherein dispensing at least one of the third fuel and the third coolant from the third flow channel into the combustion chamber comprises dispensing at least one of the third fuel and the third coolant into the combustion chamber in the second distribution pattern, or wherein dispensing at least one of the third fuel and the third coolant from the third flow channel into the combustion chamber comprises dispensing at least one of the third fuel and the third coolant into the combustion chamber in a third distribution pattern, and wherein the third distribution pattern is different from the first and second distribution patterns.
- The method of claim 1 wherein at least partially igniting the first fuel or the second fuel with an ignition feature carried by the body of the injector comprises at least partially igniting the first fuel with a first ignition feature and at least partially igniting the second fuel with a second ignition feature different from the first ignition feature, and preferably wherein at least partially igniting the first fuel comprises applying a first ignition energy to the first ignition feature, and at least partially igniting the second fuel comprises applying a second ignition energy to the second ignition feature, wherein the second ignition energy is greater than or less than the first ignition energy.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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EP15155090.2A EP2918815A1 (en) | 2010-12-06 | 2010-12-06 | Method of use of an integrated fuel injector igniters configured to inject multiple fuels and/or coolants |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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EP10860454.7A EP2649293B1 (en) | 2010-12-06 | 2010-12-06 | Integrated fuel injector igniters configured to inject multiple fuels and/or coolants |
EP15155090.2A EP2918815A1 (en) | 2010-12-06 | 2010-12-06 | Method of use of an integrated fuel injector igniters configured to inject multiple fuels and/or coolants |
PCT/US2010/059147 WO2012078133A1 (en) | 2010-12-06 | 2010-12-06 | Integrated fuel injector igniters configured to inject multiple fuels and/or coolants and associated methods of use and manufacture |
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EP10860454.7A Division-Into EP2649293B1 (en) | 2010-12-06 | 2010-12-06 | Integrated fuel injector igniters configured to inject multiple fuels and/or coolants |
EP10860454.7A Division EP2649293B1 (en) | 2010-12-06 | 2010-12-06 | Integrated fuel injector igniters configured to inject multiple fuels and/or coolants |
Publications (1)
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EP2918815A1 true EP2918815A1 (en) | 2015-09-16 |
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EP15155090.2A Withdrawn EP2918815A1 (en) | 2010-12-06 | 2010-12-06 | Method of use of an integrated fuel injector igniters configured to inject multiple fuels and/or coolants |
EP10860454.7A Not-in-force EP2649293B1 (en) | 2010-12-06 | 2010-12-06 | Integrated fuel injector igniters configured to inject multiple fuels and/or coolants |
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EP10860454.7A Not-in-force EP2649293B1 (en) | 2010-12-06 | 2010-12-06 | Integrated fuel injector igniters configured to inject multiple fuels and/or coolants |
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EP (2) | EP2918815A1 (en) |
JP (1) | JP2014500932A (en) |
CN (1) | CN103370528B (en) |
AU (1) | AU2010365037A1 (en) |
BR (1) | BR112013014122A2 (en) |
CA (1) | CA2820719A1 (en) |
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WO (1) | WO2012078133A1 (en) |
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2010
- 2010-12-06 WO PCT/US2010/059147 patent/WO2012078133A1/en active Application Filing
- 2010-12-06 CA CA2820719A patent/CA2820719A1/en not_active Abandoned
- 2010-12-06 CN CN201080071221.8A patent/CN103370528B/en not_active Expired - Fee Related
- 2010-12-06 MX MX2013006432A patent/MX2013006432A/en not_active Application Discontinuation
- 2010-12-06 EP EP15155090.2A patent/EP2918815A1/en not_active Withdrawn
- 2010-12-06 EP EP10860454.7A patent/EP2649293B1/en not_active Not-in-force
- 2010-12-06 BR BR112013014122A patent/BR112013014122A2/en not_active IP Right Cessation
- 2010-12-06 AU AU2010365037A patent/AU2010365037A1/en not_active Abandoned
- 2010-12-06 JP JP2013543133A patent/JP2014500932A/en active Pending
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WO2001065107A1 (en) * | 2000-02-28 | 2001-09-07 | Orbital Engine Company (Australia) Pty Limited | Combined fuel injection and ignition means |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9976522B2 (en) | 2016-04-15 | 2018-05-22 | Solar Turbines Incorporated | Fuel injector for combustion engine and staged fuel delivery method |
US10234142B2 (en) | 2016-04-15 | 2019-03-19 | Solar Turbines Incorporated | Fuel delivery methods in combustion engine using wide range of gaseous fuels |
US10247155B2 (en) | 2016-04-15 | 2019-04-02 | Solar Turbines Incorporated | Fuel injector and fuel system for combustion engine |
CN110344975B (en) * | 2019-07-29 | 2021-08-17 | 大连民族大学 | Working method of dual-fuel nozzle of engine |
Also Published As
Publication number | Publication date |
---|---|
BR112013014122A2 (en) | 2016-09-27 |
CN103370528A (en) | 2013-10-23 |
JP2014500932A (en) | 2014-01-16 |
EP2649293B1 (en) | 2015-12-02 |
CN103370528B (en) | 2015-01-07 |
AU2010365037A1 (en) | 2013-07-04 |
WO2012078133A1 (en) | 2012-06-14 |
EP2649293A4 (en) | 2014-08-06 |
EP2649293A1 (en) | 2013-10-16 |
MX2013006432A (en) | 2013-09-02 |
CA2820719A1 (en) | 2012-06-14 |
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