EP3534674B1 - Appareil et procédés de chauffage par induction - Google Patents

Appareil et procédés de chauffage par induction Download PDF

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Publication number
EP3534674B1
EP3534674B1 EP19159990.1A EP19159990A EP3534674B1 EP 3534674 B1 EP3534674 B1 EP 3534674B1 EP 19159990 A EP19159990 A EP 19159990A EP 3534674 B1 EP3534674 B1 EP 3534674B1
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EP
European Patent Office
Prior art keywords
substrate body
substrate
assembly
passages
metal
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EP19159990.1A
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German (de)
English (en)
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EP3534674A1 (fr
Inventor
Robin Crawford
John Douglas
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Advanced Technology Emission Solutions Inc
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Advanced Technology Emission Solutions Inc
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Priority claimed from US15/907,698 external-priority patent/US10918994B2/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means

Definitions

  • This invention relates induction heating structures and methods and has particular but not exclusive application to catalytic converters, particulate filters (PFs) and like structures for treating exhaust gases to reduce harmful pollution.
  • PFs particulate filters
  • Catalytic converters and DPFs are used in internal combustion engines to reduce noxious exhaust emissions arising when fuel is burned as part of the combustion cycle.
  • Significant among such emissions are carbon monoxide and nitric oxide. These gases are dangerous to health but can be converted to less noxious gases by oxidation respectively to carbon dioxide and nitrogen/oxygen.
  • Other noxious gaseous emission products including unburned hydrocarbons, can also be converted either by oxidation or reduction to less noxious forms.
  • the conversion processes can be effected or accelerated if they are performed at high temperature and in the presence of a suitable catalyst being matched to the particular noxious emission gas that is to be processed and converted to a benign gaseous form.
  • typical catalysts for the conversion of carbon monoxide to carbon dioxide are finely divided platinum and palladium, while a typical catalyst for the conversion of nitric oxide to nitrogen and oxygen is finely divided rhodium.
  • Catalytic converters and PFs have low efficiency when cold, i.e. the running temperature from ambient air start-up temperature to a temperature of the order typically of 300C or "light-off' temperature, being the temperature where the metal catalyst starts to accelerate the pollutant conversion processes previously described.
  • Light-off is often characterized as the temperature at which a 50% reduction in toxic emissions occurs and for gasoline is approximately 300°C. Below light-off temperature, little to no catalytic action takes place. This is therefore the period during a vehicle's daily use during which most of the vehicle's polluting emissions are produced. Getting the catalytic converter or PF hot as quickly as possible is important to reducing cold start emissions.
  • Copending US patent application 14452800 shows a catalytic converter assembly having a substrate body with a plurality of cells for cell therethrough of exhaust gases. Metal is located at predetermined locations in the substrate body and an electromagnetic field generator is mounted adjacent the substrate body for generating a varying electromagnetic field inductively to heat the metal and so heat the substrate body.
  • Document US2017/0014764 discloses a prior-art assembly for treating gaseous emissions.
  • a gaseous emissions treatment assembly may take any of a number of forms. Typical of these is a known catalytic converter having a cylindrical substrate body 10 usually made of ceramic material and often called a brick, an example of which is shown in FIG. 1 .
  • the brick has a honeycomb structure in which a number of small area passages or cells 12 extend the length of the brick, the cells being separated by walls 14. There are typically from 400 to 900 cells per square inch (cpsi) of cross-sectional area of the substrate body 10 and the walls are typically in the range 0.003 to 0.008 inches in thickness.
  • the ceramic substrate body 10 is formed in an extrusion process in which green ceramic material is extruded through an appropriately shaped die and units are cut successively from the extrusion, the units being then cut into bricks.
  • the areal shape of the cells or passages 12 may be whatever is convenient for contributing to the overall strength of the substrate body 10 while presenting a large contact area at which flowing exhaust gases can interact with a hot catalyst coating the interior walls of the cells. In other gaseous emissions treatment such as particulate filters, there may or may not be catalyst coating on the passage walls.
  • a checkerboard subset of cells have their front ends plugged, a 'reverse' checkerboard subset of cells have their back ends plugged, and gaseous emissions are treated by being driven though porous walls of the honeycomb structure from cells of the first subset into cells of the reverse subset.
  • a wash-coat typically contains a base material, suitable for ensuring adherence to the cured ceramic material of the substrate body, and entrained particulate catalyst material for promoting specific pollution-reducing chemical reactions.
  • catalyst materials are platinum and palladium which are catalysts effective in converting carbon monoxide and oxygen to carbon dioxide, and rhodium which is a catalyst suitable for converting nitric oxide to nitrogen and oxygen.
  • Other catalysts are known which promote high temperature oxidation or reduction of other gaseous materials.
  • the wash-coating is prepared by generating a suspension of the finely divided catalyst in a ceramic paste or slurry, the ceramic slurry serving to cause the wash-coat layer to adhere to the walls of the ceramic substrate body.
  • the substrate body material itself may contain a catalyst so that brick walls themselves present catalyst material at the internal surfaces bounding the cells.
  • SCR selective catalytic reduction
  • a preferred reductant is aqueous urea (2(NH 2 ) 2 CO which is often referred to as diesel exhaust fluid (DEF).
  • DEF diesel exhaust fluid
  • Suitable catalysts may be any of certain metals oxides (such as those of molybdenum, vanadium, and tungsten), certain precious metals and zeolites.
  • the typical temperature range for a SCR reaction is from 360°C to 450° C with a catalyst such as activated carbon being used to stimulate lower temperature reactions.
  • gasoline spark combustion engines
  • diesel pressure combustion engines may experience a period after a start-up where the exhaust temperature is too cool for effective SCR NO x reduction processes to take place.
  • catalytic converters in which the present invention finds application for preheating or supplementary heating are lean NOX catalyst systems, lean NOX trap systems and non-selective catalytic reduction systems.
  • the present invention is applicable also to each of these nitrogen oxide emissions treatment assemblies.
  • a gaseous emissions treatment assembly may have a series of the substrate bodies or bricks 10, each having a particular catalyst layer or emissions treatment mode depending on the noxious emission to be reduced or neutralized.
  • Gaseous emissions treatment bricks may be made of materials other than fired ceramic, such as stainless steel. Also, they may have different forms of honeycombed cells or passages than those described above. For example, cells can be round, square, hexagonal, triangular or other convenient cross-sectional shape.
  • some of the extruded honeycomb walls can be formed so as to be thicker than other of the walls or formed so that there is some variety in the shape and size of cells. Junctions between adjacent interior cell walls can be sharp angled or can present curved profiles.
  • the wash-coated ceramic honeycomb brick 10 is wrapped in a ceramic fibrous expansion blanket 16.
  • a stamped metal casing or can 18 transitions between the parts of an exhaust pipe (not shown) fore and aft of the gaseous emissions treatment unit so as to encompass the blanket wrapped brick.
  • the casing 18 is typically made up of two parts which are welded to seal the brick in place.
  • the expansion blanket 16 provides a buffer between the casing 18 and the brick 10 to accommodate their dissimilar thermal expansion coefficients.
  • the metal of the sheet metal casing 18 expands much more than the ceramic material of the brick at a given temperature increase and, if the two materials were bonded together or in direct contact with each other, destructive stresses would be experienced at the interface of the two materials.
  • the blanket 16 also dampens vibrations from the exhaust system that might otherwise damage the brittle ceramic of the substrate body 10.
  • the encased brick (or bricks) is mounted in the vehicle exhaust line to receive exhaust gases from the engine and to pass them to the vehicle tail pipe.
  • the passage of exhaust gases through the gaseous emissions treatment unit heats the ceramic brick 10 to promote catalyst activated processes where the flowing gases contact the catalyst layer.
  • Such treatment units operate substantially to reduce the presence of noxious gaseous emissions entering the atmosphere.
  • Such units have shortcomings however at start-up when the interior of the brick is at low temperature, during idling during city driving or when waiting for a coffee at a Tim Hortons drive-through, and between electric driving periods for hybrid vehicles.
  • Brick shape, profile and cell densities vary among different manufacturers. For example, some bricks are round and some are oval. Some assemblies have single stage bricks that are generally heavily wash-coated with the catalyst metals, while others may have two or three bricks with different wash-coatings on each brick. Some exhausts have 900, 600 and 400 cpsi cell densities used in the full exhaust assembly, while others use only 400 cpsi bricks throughout.
  • a close-coupled converter may be mounted up close to the exhaust manifold with a view to reducing the period between start-up and light-off temperature.
  • An underfloor converter can be located further from the engine where it will take relatively longer to heat up but be relatively larger and used to treat the majority of gases once the exhaust assembly is up to temperature.
  • a unit for reducing the period to light-off temperature and a unit to deal with high gas flow after light-off are mounted together in a common casing.
  • sensors mounted in the exhaust gas flow including within or adjacent the substrate body provide feedback to the engine control system for emission checking and tuning purposes.
  • control of fuel and air input has the object typically of maintaining a 14.6:1 air: fuel ratio for an optimal combination of power and cleanliness. A ratio higher than this produces a lean condition - not enough fuel. A lower ratio produces a rich condition - too much fuel.
  • the start-up procedure on some vehicles runs rich for an initial few seconds to get heat into the engine and ultimately the catalytic converter.
  • the structures and operating methods described below for indirectly heating the catalyst layers and the exhaust gases can be used with each of a close-coupled catalytic converter, an underfloor converter, and a combination of the two.
  • Outputs from the temperature sensors are taken to a controller at which the monitored temperature or temperatures are used to control when induction heating is switched on and off.
  • the monitored temperatures may also be used to control specific effects of the applied heating processes to achieve a particular heating pattern.
  • a gaseous emissions treatment assembly such as that shown in FIG. 1 is modified as shown in FIGs. 2 and 3 to enable induction heating.
  • Induction heating is a process in which a metal body is heated by applying a varying electromagnetic field so as to change the magnetic field to which the metal body is subject. This, in turn, induces eddy currents within the body, thereby causing resistive heating of the body.
  • heat is also generated by a hysteresis effect.
  • the non-magnetized ferromagnetic metal is placed into a magnetic field, the metal becomes magnetized with the creation of magnetic domains having opposite poles.
  • the varying field periodically initiates pole reversal in the magnetic domains, the reversals in response to high frequency induction field variation on the order of 1,000s to 1,000,000s cycles per second (Hz) depending on the material, mass, and shape of the ferromagnetic metal body.
  • Hz cycles per second
  • a metal coil 20 surrounding the ceramic substrate body 10 is a metal coil 20 and, although not visible in FIG. 2 , located within selected ones of the cells 12 are metal pins, rods, wires or other metal inserts 22 ( FIG. 4 ).
  • a chain reaction is initiated, the end result of which is that after start-up of a vehicle equipped with an exhaust system embodying the invention, light-off temperature may be attained more quickly in the presence of the varying electromagnetic induction field than if there were no such field.
  • the chain reaction is as follows: the varying electromagnetic field induces eddy currents in the metal elements 22; the eddy currents cause heating of the metal elements; heat from the metal elements 22 is transferred to the ceramic substrate body 10; heat from the heated substrate body 10 is transferred to exhaust gas as it passes through the emissions control unit; and the heated exhaust gas causes catalytic reactions to take place more quickly at the walls 14 compared to unheated exhaust gas.
  • Conduction from the heated wires, pins or other filling elements 22 is the primary source of heat transfer to the ceramic substrate 10 and therefore to the exhaust gases when the emissions unit is in operation. There is also a small amount of convective and radiated heat transfer at any small air gaps between a wire and the interior surface of the cell within which it is contained.
  • the coil 20 is a wound length of copper tube, although other materials such as copper wire or litz wire may be used. Copper tube is preferred because it offers high surface area in terms of other dimensions of the coil; induction being a skin-effect phenomenon, high surface area is of advantage in generating the varying field. If litz wire or copper wire is used, an enamel or other coating on the wire is configured not to burn off during sustained high temperature operation of the converter. An air gap between the coil 20 and the nearest inductance metal wires 22 prevents significant heat transfer from the wires 22 to the coil 10 which would otherwise increase the coil resistivity and so lower its efficiency.
  • a layer 24 of electromagnetic field shielding / concentrating material is located immediately outside the coil 20 to provide induction shielding and to reduce induction loss to the metal converter housing.
  • the layer 24 also acts to increase inductive coupling to the metal in the substrate body 10 to focus heating.
  • the shield / concentrator 24 can be made from a ferrite or other high-permeability, low-power-loss materials such as Giron, MagnetShield, Papershield, Finemet, CobalTex, or other magnetic shielding material that can be arranged to surround some or all of the windings of the coil 20.
  • the magnetic shield 24 operates as a magnetic flux concentrator, flux intensifier, diverter, or flux controller to contain the magnetic fields within the substrate body.
  • the magnetic shield lowers loss by mitigating undesirable heating of adjacent conductive materials. Without the magnetic shield / concentrator 24, magnetic flux produced by the coil 20 could spread around the coil 20 and link with the electrically conductive surroundings such as the metal casing 18 and other surrounding metal in an exhaust system, and/or other components of an internal combustion engine, vehicle, generator or other electrical system or host system, decreasing the life of these components and increasing energy loss.
  • the layer 24 operates to direct or concentrate the magnetic field to the substrate body 10 providing selective or enhanced heating of a desired region of the substrate body 10, for example, by redirecting magnetic flux that would otherwise travel away from that desired region.
  • the layer 24 operates to concentrate the magnetic flux produced by the coil 20 in the direction of the metal wires or rods 22 in the substrate body 10 for more efficient heating.
  • the magnetic shield can improve the electrical efficiency of the induction coil 20 by increasing power transfer.
  • the coil is contained in a fiber insulation sheath 26 with the sheathed coil being encased in a in cast, cured insulation.
  • the sheath functions both to stabilize the coil position and to create an airtight seal to confine passage of the exhaust gases through the ceramic honeycomb substrate body 10 where catalytic action takes place.
  • the insulation also provides a barrier to prevent the induction coil 20 from shorting on the converter can 18 or the ferrite shield 24.
  • the insulation is suitably alumino-silicate mastic.
  • the substrate body can be wrapped in an alumino-silicate fiber paper.
  • the copper coil 20 is wrapped around the substrate body and then placed in the casing or can 18.
  • the coil 20 is placed in the can or casing 18 and the substrate body 10 is inserted into the coil / can assembly.
  • a varying electromagnetic induction field is generated at the coil by applying power from either a DC or AC source.
  • Conventional automobiles have 12 VDC electrical systems.
  • the induction system can operate on either DC or AC power supply.
  • the induction signal produced can also be either DC or AC driven. For either DC or AC, this produces a frequency of 1 to 200 kHz, a RMS voltage of 130 to 200V and amperage of 5 to 8A using 1kw of power as an example.
  • a DC to DC bus converts the vehicle's 12 VDC battery power to the required DC voltage outlined above.
  • a DC to AC inverter converts the vehicle's 12V DC battery power to the desired AC voltage outlined above.
  • Another example is more suited to hybrid vehicles having both internal combustion engines and electric motors have on-board batteries rated in the order of 360V voltage and 50kW power.
  • the battery supply power is higher, but the same basic DC to DC bus or DC to AC inverter electrical configuration can be applied.
  • An insulated gate bipolar transistor (IGBT) or metal-oxide-semiconductor field effect transistor (MOSFET) high speed switch is used to change the direction of electrical flow through the coil.
  • IGBT insulated gate bipolar transistor
  • MOSFET metal-oxide-semiconductor field effect transistor
  • a high switching frequency produces a shorter waveform, which generates higher surface temperature at the sacrifice of penetration depth.
  • Applied power is limited to avoid the risk of melting the metal elements or having them reach Curie point.
  • a suitable power input to a single brick coil is of the order of 1.1kw.
  • inserts 22 such as wires, pins or other filling made of ferromagnetic or other metal are located at selected locations of the ceramic substrate body 10 as shown in the detail view of FIG. 4 .
  • wires they may be fixed in place by a friction fit at least partially achieved by closely matching the wire exterior area dimensions to the cell area dimensions so that surface roughness of the wire surface and the cell walls 14 holds the wires 22 in place.
  • a wire can be formed with a resiliently flexible element (not shown) which is flexed from a rest condition as the wire is inserted into a cell so that a part of the wire bears against an interior wall of the cell 12 and so provides frictional retention.
  • the overall friction fit can be such as to resist gravity, vibration, temperature cycling, and pressure on the wires as exhaust gases pass through the substrate body.
  • Wires 22 may alternatively, or in addition, be fixed into the cells by bonding outer surfaces of the wires to interior surfaces of the cell walls 14.
  • a suitable composite adhesive may be a blend of materials chosen to reduce temperature cycling stress effects in which there may be significant metal wire expansion / contraction, but vanishingly small expansion / contraction of the ceramic substrate. This differential can produce stresses at the adhesive interface between the two materials. By using such a composite adhesive, movement of a bonded wire relative to the surrounding cell walls may be reduced while maintaining high heat transfer.
  • Metal inserts may alternatively be introduced into selected cells as molten metal, metal slugs or metal power which is then treated to render the inserted material in such a state and relationship with the walls of the substrate as to retain metal in the selected cells.
  • Field produced by the electromagnetic induction coil can be tuned to the metal wire load to achieve high efficiency in terms of generating heat and reduced time to light-off temperature. Heating effects can be modified by appropriate selection of any or all of (a) the electrical input waveform to the coil 20, (b) nature and position of passive flux control elements such as the shield / concentrator 24, and (c) nature, position, and configuration of the coil 20.
  • the applied field can be changed with time so that there is interdependence between the induction field / heating pattern and the particular operational phase; for example, pre-start-up, warm-up, highway driving, idling and for hybrids, intermittent change over from internal combustion to electric drive.
  • more than one coil can be used to obtain desired induction effects.
  • a substrate body having an annular cross-section can have one energizing coil at the substrate perimeter and a second energizing coil at the substrate core (not shown).
  • the heating pattern can be determined by appropriate location and configuration of the metal pins or wires 22.
  • a suitable metal for the inserted wire is a ferromagnetic metal such as stainless steel grade 430 which has high magnetic permeability and corrosion resistance.
  • Lower permeability alloys such as 300 or 400 series stainless steels may also be used.
  • Alternative metals can be used depending on particular properties required in making the wire inserts and in fixing inserts within selected cells of the ceramic substrate. Such properties include metal formability, ductility, softness and elasticity.
  • lower magnetic permeability metals or alloys may be used for metal inserts in the outer cells with relatively higher magnetic permeability metals being used for metal inserts in the inner cells. Metals having very high magnetic permeability may also be used.
  • Kanthal iron-chrome-aluminum alloys used in wires manufactured by Sandvik have a relative permeability of 9000 and greater. High relative permeability can be achieved using wires made of other alloys including nickel-iron and iron-cobalt alloys.
  • a substrate such as substrate 10
  • a substrate may typically have a length of from 3 to 6 inches
  • an upstream section of the substrate 2 inches or even less in length is at light-off temperature over its full extent
  • emissions gas passing through that part of the substrate will quickly drive downstream catalyst coated areas to light-off temperature.
  • Catalytic reactions that take place at and above the light-off temperature are generally exothermic so that after light-off is achieved upstream, a self-fuelling cascade effect is produced at the downstream part of the substrate. Consequently, although an inductively heated front section may be narrow compared with that part of the substrate that is not inductively heated, sufficient mass flow and heat may exist to drive the rest of the substrate rapidly to light-off temperature.
  • the exothermic catalyst promoted burning of unburned components in the exhaust gas develops downstream into a chain reaction after the small upstream substrate section reaches light-off.
  • Rapid heating to light-off temperature can be achieved by using high pin density with pin heating sites located close together so that the light-off temperature is attained across the full cross section of the substrate.
  • increased density of packing of metal inserts 22 into the passages 12 increases pressure drop through the system and so limits how much of the cross-sectional area of the ceramic substrate 10 can be blocked with metal inserts 22. This, in turn, limits how much of the cross-sectional area of the substrate will reach light-off temperature during operation.
  • Pressure drop over the length of an emissions treatment assembly is related to the amount of work required for an engine to drive its gaseous emissions through the assembly. The more work the engine most do to deal with emissions treatment, the less efficient it is in terms of turning burning of fuel into driving the vehicle.
  • Frictional losses are due to exhaust flow along the narrow cells of the substrate.
  • Impingement losses are due to the blocking cross-sectional area that the exhaust flow encounters at the face of the substrate, this including the end walls of the cells and any cells that are occluded by metal inserts.
  • Expansion losses are due to transition in flow as emissions gases exit the ceramic substrate at high velocity, with the gas from discrete channels expanding into a slower flowing mass. While the diameter of the substrate can be increased to compensate for additional pressure drop caused by the presence of more pins, this requires a bigger unit and higher materials cost.
  • pressure drop from frictional losses has an approximately linear relationship with length and accounts for about 90% of total pressure drop in for example, a unit having a 3 inch (0.0762 metres) ceramic substrate, a cpsi (cells per square inch) between 400 and 900 and an exhaust gas flow rate of 5 metres /second. If, as shown in FIG. 4 , selected passages are stacked with pins at a packing density of 1:x, the pressure drop increases by about (100/x)%, a cell 12 being considered blocked by a pin 22 regardless of pin length.
  • the pressure drop P remains approximately the same if one part of the substrate of length 'L/2' has a pin density of 1:x/2 and the remaining part of the substrate of length 'L/2' has open unblocked cells.
  • This relationship extends beyond the above example, with the pressure drop again being substantially unchanged for a first substrate part of length 'L/3' and pin density '1:x/3' and the remaining part of the substrate of length '2L/3' having open unblocked cells. With such arrangements, however, while the pressure drop remains relatively constant, more heating sites are present.
  • pin density and relative length of the heated part of the substrate can be adjusted without significantly affecting the pressure drop though the system.
  • a smaller volume of substrate can be inductively heated in order to attain light-off temperature more quickly than if the whole substrate were subjected to the same power input.
  • placement of pins 22 and their inductive heating by coil 20 is limited to a front part of the substrate where the exhaust gas enters.
  • the front part 28 of the substrate 10 has a high pin stacking density and the passages 12 in the rear part 30 of the substrate are open and unblocked.
  • the length relationship between the front and rear parts 28, 30 and the pin stacking density of the front part 28 depends at least partly on whether the heating characteristics and the resulting pressure drop are operationally acceptable.
  • metal inserts 22 occupy a regular array of 1 in 9 passages at the front part 28 of the substrate 10 with occupied passage lengths to the rear of the pins 22 being open.
  • the front part has a maximum pin length which is 50% of the length of the rear part or 33% of the overall substrate length.
  • the pins 22 in the front part of the substrate are distributed with their trailing ends in a D or parabola shape. Magnetic flux from the surrounding coil 20 is strongest closest to the coil 20 and weakens further away from it.
  • the D-shaped wire array distributes the magnetic flux well and also compensates for inductive energization being a "line of sight" process whereby wires 22 near the interior of the substrate 10 may be in the shadow of energized wires nearer the coil 20.
  • the passages 12 at the front of the brick can be packed at more or less than 1:9.
  • a packing range of from 1:4 to 1:16, has been found particularly advantageous from the viewpoint of acceptable pressure drop while achieving high intensity heating. In such a range, gaseous emissions can pass through the brick without unacceptable pressure drop through the system.
  • the pins 22 must provide sufficient metal per unit volume to achieve a desired heating profile in the heated front 28 without damaging the pin material.
  • the parabola or D stacking of pins can be longitudinally reversed although the configuration shown is preferred for ease of placing the metal inserts during manufacture.
  • D stacking of pins a 50 mm substrate slice in which generally uniform output temperature across the substrate was obtained, the shortest pin used was 9 mm. in length (at the outside of the heater slice) and the longest pin length was 50 mm (at the centerline).
  • the length of the front part compared to the total length of the substrate can be less than 33% provided the front part of the substrate is large enough to accommodate the desired level of pin packing given that there is a lower limit to pin length for increasing heating intensity.
  • the induction system requires substantial load (in this case, mass of pin material) to absorb the magnetic flux. Too little mass can lead to overheating and melting of the pins and the loss of electrical to thermal efficiency if the pin material reaches its Curie point. At that temperature, electromagnetic characteristics of the pin material deteriorate. Also with large power applied to a small load, the power supply may overheat and fail.
  • the passages 12 should have enough catalyst coated surface (or particulate filter surface in the case of particulate filters) effectively to treat the emissions gases passing through the system.
  • Concentrating heating at the front 28 of the substrate increases the heat that each wire generates for a given pin array pattern and input power and so increases localized heating.
  • an issue with the structure is that ceramic of substrate 10 conducts heat away in all directions during the heating cycle. This effectively increases the total volume of the ceramic that the heat occupies and therefore reduces the intensity over the volume of the pin occupied sites for a particular power input.
  • the assembly has a front substrate 32 or 'slice' that is separate from a rear substrate 34.
  • the two substrates are mounted in line with a selected subset of the cells or passages of the slice substrate 32 occupied by metal inserts 22 such as wires, pins or other forms of metal filling to enable inductive heating, and with the cells or passages 12 of the rear brick 34 being open.
  • the slice substrate 32 in terms of the direction 36 of flow of emissions gas to be treated, is substantially shorter than the rear brick 34.
  • the slice length can be from 2% to 50% of the length of the rear substrate although the practical suitability of any particular percentage choice depends on the length to diameter ratio of the rear substrate.
  • front slice substrate 32 has an important function as a heater, walls of the front brick passages 12 can be coated with emissions treatment catalyst so that the slice substrate 32 is operable both to heat and treat emissions gas before it passes from the front brick 32 across a gap 38 into the rear brick 34 to be treated in a further catalyst-promoted reaction.
  • pressure drop impact is reduced by having the inductively heated front unit 32 separate from the downstream unit 34 with the downstream unit being heated by the passage of hot gas from the front unit.
  • the pin packing density and so the number of heating sites per unit cross-sectional area of the unit 32 is significantly increased so as to attain hot regions at the pins 22 and relatively hot regions between the closely spaced pins. The result is a relatively uniform temperature reached across the full cross section of the slice 32 sufficient for light-off temperature to be attained quickly.
  • the bricks 32 and 34 are separated by a distance of the order of 2 to 6 mm.
  • gaseous emissions passing along the slice substrate 32 with a typical flow velocity of from less than 0.5 metres per second to greater than 5 metres per second readily adapt from flow in the front brick 32 to flow in the rear brick 34 without materially increasing pressure drop.
  • pressure drop is higher because of a wake effect as the flow exits the inductively heated substrate. This is caused by the flow from the cells of the induction heated unit spreading into the void behind a blocked cell that contains the heating element.
  • the 2 to 6 mm is representative of the general distances that it takes for the wake effect to partially or fully subside depending on the cell density of the substrate and the associated pin array density.
  • a high cpsi substrate with a low pin array density gives the shortest wake effect corresponding to the smallest required separation distance.
  • a separation distance below 2 mm leads to a higher pressure drop as wake effect is at its highest intensity.
  • the rear substrate acts as if it has a blocked cell with little to no airflow through the associated channel if that open cell is aligned too closely with a blocked cell of the front substrate. This analysis assumes that the front and rear substrates are perfectly aligned. Misalignment of the substrates gives rise to an even greater pressure drop from small separation distances.
  • the separation is greater than 6 mm there is not the disadvantage of the wake effect but packaging inevitably increases in size.
  • a large gap may also allow insulation from the fibrous mats to bulge into the space and become influenced by the exhaust flow, either by reducing the opening diameter or leading to the onset of insulation degradation.
  • the MFC is shorter than the inductively heated substrate to allow for application of an insulation layer and canning by means of collapsed down sheet metal.
  • An advantage of a small gap between the substrates is that the MFC can be made longer than normal so that it overlaps the rear (non-heater) substrate which results in an increase in electromagnetic efficiency of the heater unit. Insulation at the gap acts to protect the MFC by supporting it both sides of the gap.
  • the orientation of a front slice substrate 32 relative to the rear brick 34 is adjusted during assembly by an optical alignment process to reduce the area of wall end-to-wall end incidence; i.e., to increase the area of passage-to-passage incidence.
  • the bricks are held in alignment by a common jacket arrangement (not shown) similar to the jacket arrangement shown in FIGs. 2 and 3 or by any other suitable mounting.
  • opposed faces 40 of the front and rear bricks 32, 34 are flat and perpendicular to the longitudinal axes of the bricks.
  • the gap between the bricks 32 and 34 can be alternatively shaped, for example, generally to follow the dome / parabola shaped distribution of the pin trailing ends ( FIG. 6E ).
  • a heating slice substrate is mounted downstream of an emissions treatment brick. In this way, gas exiting the upstream brick 33 is given an inductive heating boost before passing further down the exhaust line to a subsequent emissions treatment brick.
  • the decoupled design of FIG. 6 has merit in terms of product integrity.
  • materials frequently used for making substrates are low-expansion, honeycomb ceramics such as cordierite and silicon carbide. These materials are highly thermally insulating but are not zero-expansion materials so a temperature gradient can cause stresses to develop. Ideally, gradients are low enough that stresses do not accumulate sufficiently to cause a defect or substrate failure.
  • temperature gradients within the ceramic will correspondingly increase, heightening the risk of defects and failure.
  • temperature gradients are extreme because regions of the ceramic that are being heated are physically linked to cold regions having no heating.
  • Hot regions can, for example, be 700°C or greater while cold regions may be below 0°C, this variation being over a very short distance of the ceramic.
  • a design with intense heating only at the front face and the rear kept cold is more prone to fail by popping of the front portion of the ceramic from the main body.
  • the decoupled brick embodiment of FIG. 6 is characterized by a lower temperature gradient.
  • the small volume of the front brick 32 allows even the brick extremities that are not directly heated to rise in temperature through conduction. This avoids the extreme 700°C to 0°C gradient presented above. Instead, 700°C may be the maximum temperature but a minimum temperature of the order of 350°C may prevail.
  • Such a temperature gradient over a distance of about 3.5 centimetres (1.375 inches) is more manageable and configurable into commercial designs. Additionally, because of the absence of substrate material at the gap 38, heat is not lost by conduction towards the back of the assembly. This in turn means that generated heat that might otherwise be conducted away is retained in a smaller front volume to increase heating efficiency and speed.
  • a feature of the front-end heater with its high metal content to focus heating in a small volume at the front of a unit is that relatively densely packed metal acts to concentrate the field from the surrounding coil 20 to increase heating and, as a corollary acts to reduce undesirable field effects at the casing 18 ( FIGs. 2, and 3 ).
  • the magnetic flux concentrator is relatively thick to handle high power and the coil is relatively large to handle high voltage.
  • the magnetic flux concentrator is relatively thin because of the relatively low power and the coil is relatively small because the voltage is lower.
  • the magnetic flux concentrator is relatively thin because of the relatively low power and the coil is relatively short because the slice is thinner.
  • the passages 12 of the heating slice substrate 32 are made only long enough as is required to provide necessary structural support for the pins 22.
  • the pins 22 can project forwardly from the front face 42 of the brick and / or can project rearwardly from the back face 44 of the brick. Consequently, certain parts of the pins 22 may be separated from adjacent pins by air instead of insulating ceramic which may increase conduction within the heating volume.
  • occupation of the slice passages by the wires or pins is in other than a D or parabola shape.
  • some or all of the pins can be of uniform length or some other configurations can be used to obtain desired heat profiles of exiting exhaust gas across the area of the slice.
  • the decoupled or slice configuration has further merit in relation to complex washcoated catalyst arrangements of the sort where the gaseous emissions are subjected to two or more different treatments.
  • Application of catalyst washcoat is generally done by taking a bare substrate and dipping it into slurry that contains the catalyst metals and a porous ceramic carrier. Capillary action within the porous substrate wicks the water/liquid from the slurry and this deposits the precious metal and ceramic material on passage surfaces. Residence time during dipping and the number of dip cycles can be varied to produce thick washcoats which are desirable for maximum emissions treatment.
  • a vacuum system is used to suck away excess liquid and then the washcoated substrate is heated to cure the washcoat onto the cell walls.
  • two different washcoats are needed in a catalyst assembly; for example, when multiple emissions gases are being treated in a single system with each emissions gas requiring its own washcoat chemistry.
  • Applying two different washcoats is challenging for a single substrate because in current commercial production processes, one washcoat is applied to one end of the substrate and a different washcoat is applied to the other end of the substrate. Submersion depth during dipping is difficult to control and generally a clean transition between two washcoats is not achieved.
  • the washcoats inherently narrow the open area of the cells but there is frequently also taper to the washcoat thickness. Vacuum removal to leave a consistent thickness of washcoat material during coating is easier to achieve at substrate ends than at the middle of the substrate.
  • the FIG. 6 heating slice design makes the dual washcoat process easier and generally gives better quality results.
  • cpsi substrates In manufacturing substrate material, there are several different commercially available cpsi substrates to choose from, these typically including 400, 600, and 900 cpsi structures although higher cpsi substrates have been achieved. These substrates are also available with different wall thicknesses for a given cpsi. Also, substrates are available made from one of several different ceramic materials. There may be the need to optimize the performance or cost of a catalyst assembly. For example, a design could be optimized by using relatively costly 900 cpsi, thin wall (low mass), silicon carbide as the material of the front substrate and low cost, 400 cpsi, thick wall, cordierite substrate as the material of the back substrate.
  • the front brick 32 has catalyst coated passages 12, the passages may alternatively be devoid of catalyst, meaning that the brick serves solely as a pre-heater to heat emissions gases passing along its passages before crossing the gap 38 to the rear unit 34.
  • the distribution of inductance metal elements relative to the positions of the cells is configured so that heating is generally uniform and rapid across a thin front substrate section or a separate substrate body. Localisation of heating in an upstream pre-heater may be enhanced by using differently sized and or/shaped cells and differently sized, shaped and/or composition wires.
  • the front end induction slice heater design creates a rapid inferno of heat providing very fast period to light-off and rapid attainment of high temperature of the catalyst without requiring engine exhaust flow. Extreme energy is concentrated over a small volume producing a high intensity heating.
  • the induction heated slice is constructed with enough thermal mass to overcome cooling effects of exhaust flow during cold starts to enable manufacturers to achieve near-zero noxious emissions vehicle platforms.
  • Packaging the slice design in the context of current state-of-the art converters and particulate filters is rendered easy by virtue of the small footprint of the slice induction heater system.
  • the same proven electronics that power a conventional induction technology such as that described in US Patent 9488085 are also used to power the slice induction heater design.
  • the substrate of an upstream brick 60 has an inductively heated rear end section 62 positioned immediately upstream of a downstream emissions gas treatment brick 64.
  • the downstream substrate 64 may be inductively unheated and so depend for reaching light-off on the temperature of incoming emissions gases that are inherently hot by virtue of being exhaust gas or having had the exhaust gas temperature raised through inductive heating at the upstream unit 60.
  • the upstream unit may additionally have an associated electromagnetic field generator at a front section of the upstream brick.
  • the downstream brick may have an electromagnetic field generator at its front end.
  • the three heating zones may be optionally energized at different times or to a different power level from each other.
  • the upstream unit can also be configured for an emissions treatment that is different in type from the emissions gas treatment process occurring in the downstream unit. Any of the three end sections can be configured as a separate slice.
  • the various distributions of metal inserts in the inductively heated substrate can be looked on as a metal matrix.
  • the metal matrix is an inductively heated coiled, corrugated metal slice 46 as shown in the embodiment of FIGs. 8 and 8A .
  • the metal matrix is a number of concentric metal blades 48 surrounding an open hub 50 as shown in the embodiment of FIGs. 9 and 9A .
  • the metal matrix is a mesh of randomly distributed metal filaments 52 as shown in the embodiment of FIGs. 10 and 10A .
  • the metal matrix is a woven mesh of metal filament 54 as shown in the embodiment of FIGs. 11 and 11A .
  • the metal matrix is a perforated metal plate as shown in the embodiment of FIGs. 12 and 12A .
  • the pre-heater has a honeycomb ceramic substrate 32 but with ceramic constituting the honeycomb walls heavily doped with metal as indicated at 58 in the embodiment shown in FIGs. 13 and 13A .
  • the front brick pre-heater (or in some cases a post-heater) is optimized to provide a relatively dense metal load to enable rapid, high intensity inductive heating from the surrounding coil (not shown in FIGs. 8 to 13 ).
  • the metal load is not so large nor the wires so densely packed as to affect the flow of emissions gas by introducing an unacceptable pressure drop into the exhaust line.
  • a heating unit for use as a space heater has a ceramic substrate body through which extend passages, with metal inserts of wire, pins or other metal filling in a subset of the passages.
  • An induction coil is mounted around the substrate body and is energized to generate a varying electromagnetic field so that at least some of the generated electromagnetic flux permeates metal wire inserts to inductively heat them.
  • a fan is mounted so as to force air along the passages that are not blocked by the metal wire inserts. In use, heat transfers from the inductively heated metal bodies to adjacent substrate body walls to heat the substrate body. In turn, at the unoccupied passages, heat transfers from the substrate body to heat air that is being forced along the passages by the fan.
  • a heating unit of the sort illustrated in FIG. 14 can, for example, be used for cabin heating of a motor vehicle. This is of particular value for electric vehicles where there is no combustion engine or plug-in hybrids where engine operation and associated heating may not be available until some time after initial vehicle usage.
  • Such emissions treatment units can either be inductively heated in any of the arrangements previously described or can be positioned to receive heat from an inductively heated upstream unit, whether that is the form of a section of a longer substrate or in the form of a separate slice.
  • a gas heater comprises a ceramic honeycomb substrate body having a first plurality of passages extending the length of the substrate body for transmitting a flow of gas directed into the passages at one end of the substrate from said one end to the other end thereof, a second plurality of linear passages extending the length of the substrate body, a first plurality of elongate metal inserts substantially blocking respective ones of the second plurality of passages, an electromagnetic field generator configured to inductively heat the metal inserts and a flowing gas source upstream of the substrate body for producing said flow of gas.
  • the flowing gas source can be an internal combustion engine with the gas being gaseous emissions from the internal combustion engine.
  • the flowing gas source is a fan mounted adjacent said one end of the substrate and operable to blow air into passages of the first plurality thereof.
  • an assembly for use in treating gaseous emissions comprises a metal matrix and a plurality of passages through the matrix for the passage of emissions gas through the passages entering at one end of the metal matrix and exiting at the other end of the metal matrix, an electromagnetic field generator configured to inductively heat the metal in the matrix and thereby to heat emissions gas passing along the matrix, and a substrate body having a plurality of linear passages for receiving emissions gas exiting from the other end of the metal matrix, the metal matrix generally aligned with the substrate body.
  • the metal matrix can be one of an inductively heated coil, a corrugated metal slice, a plurality of concentric metal blades surrounding an open hub, a mesh of randomly distributed metal filaments, a woven mesh of metal filament, and a honeycomb ceramic substrate with the ceramic heavily doped with metal.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Exhaust Gas After Treatment (AREA)

Claims (14)

  1. Ensemble destiné à être utilisé dans le traitement d'émissions gazeuses comprenant un premier corps de substrat (34, 60) ayant une première pluralité de passages linéaires (12) s'étendant sur la longueur du premier corps de substrat pour le passage de gaz d'émission d'une extrémité à l'autre extrémité du premier corps de substrat, un second corps de substrat (34, 64) ayant une seconde pluralité de passages linéaires pour recevoir le gaz d'émission sortant de l'autre extrémité du premier corps de substrat, le premier corps de substrat étant généralement aligné avec, mais séparé de, le second corps de substrat, l'un des corps de substrat ayant un corps métallique allongé (22) dans chacun d'un sous-ensemble de la pluralité de passages du corps de substrat avec une concentration de métal par unité de volume dans le corps de substrat augmentant vers une extrémité dudit corps de substrat, et un générateur de champ électromagnétique conçu pour chauffer par induction les corps métalliques et ainsi chauffer ledit corps de substrat, le premier corps de substrat étant séparé du second corps de substrat par une distance de l'ordre de 2 à 6 mm.
  2. Ensemble selon la revendication 1, ledit corps de substrat étant le premier corps de substrat.
  3. Ensemble selon la revendication 1, ledit corps de substrat étant le second corps de substrat.
  4. Ensemble selon l'une quelconque des revendications 1 à 3, la longueur dudit corps de substrat étant une fraction de la longueur dudit autre corps de substrat, la fraction étant comprise entre 2 % et 50 %.
  5. Ensemble selon l'une quelconque des revendications 1 à 4, le sous-ensemble de passages occupés par lesdits corps métalliques dans le corps de substrat unique ayant une plage comprise entre 1:2 et 1:49 d'occupation de densité de la pluralité de passages dans ledit corps de substrat unique.
  6. Ensemble selon les revendications 1 à 4, le sous-ensemble de passages occupés par lesdits corps métalliques dans le corps de substrat unique ayant une plage comprise entre 1:4 et 1:16 d'occupation de densité de la pluralité de passages dans ledit corps de substrat unique.
  7. Ensemble selon l'une quelconque des revendications 1 à 6, l'orientation du premier corps de substrat par rapport au second corps de substrat étant alignée pour augmenter la surface d'incidence de passage à passage.
  8. Ensemble selon la revendication 7, le premier et le second corps de substrat étant maintenu en alignement par un agencement de chemises commun.
  9. Ensemble selon l'une quelconque des revendications 1 à 8, le nombre de passages par unité de surface du premier corps de substrat étant différent du nombre de passages par unité de surface du second corps de substrat.
  10. Ensemble selon l'une quelconque des revendications 1 à 9, les corps métalliques ayant une longueur, la longueur maximale de corps métallique étant sensiblement égale à la longueur dudit corps de substrat.
  11. Ensemble selon l'une quelconque des revendications 1 à 10, les corps métalliques allongés étant positionnés plus près d'une première extrémité dudit corps de substrat que d'une seconde extrémité de celui-ci.
  12. Ensemble selon l'une quelconque des revendications 1 à 11, la forme d'une face arrière du premier corps de substrat correspondant à la forme d'une face avant du second corps de substrat.
  13. Ensemble selon l'une quelconque des revendications 1 à 12, les passages de l'autre corps de substrat étant des passages ouverts.
  14. Ensemble selon l'une quelconque des revendications 1 à 13, les surfaces intérieures des passages linéaires de l'autre corps de substrat étant revêtues d'un premier matériau catalyseur pour accélérer le traitement des émissions gazeuses.
EP19159990.1A 2018-02-28 2019-02-28 Appareil et procédés de chauffage par induction Active EP3534674B1 (fr)

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WO2021049094A1 (fr) * 2019-09-11 2021-03-18 日本碍子株式会社 Structure en nid d'abeilles, et dispositif de purification de gaz d'échappement
DE112020006710T5 (de) * 2020-03-19 2022-12-01 Ngk Insulators, Ltd. Wabenstruktur, abgasreinigungskatalysator und abgasreinigungssystem
DE112021001590T5 (de) * 2020-05-14 2022-12-29 Ngk Insulators, Ltd. Wabenstruktur und abgasreinigungsvorrichtung

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1452800A (en) 1922-08-21 1923-04-24 Ginger Henry Heating and lighting radiator
US3581489A (en) * 1968-12-17 1971-06-01 Sun Oil Co Apparatus for inductive heating nonconductive exhaust treatment catalyst
DE4222469C1 (de) * 1992-07-08 1994-01-27 Gossler Kg Oscar Verfahren und Vorrichtung zur thermischen Behandlung von Gas, insbesondere thermischen und/oder katalytischen Nachverbrennung von Abgas
DK29093D0 (da) * 1993-03-15 1993-03-15 Per Stobbe Heated silicon carbide filter
US6318077B1 (en) * 2000-03-13 2001-11-20 General Motors Corporation Integrated thermal and exhaust management unit
US20120102922A1 (en) * 2010-10-29 2012-05-03 Gm Global Technology Operations, Inc. Method of sizing a heating core of an exhaust heater for an exhaust treatment system of a vehicle
JP5624865B2 (ja) * 2010-12-06 2014-11-12 日本特殊陶業株式会社 排気ガス加熱装置
US10267193B2 (en) * 2015-11-20 2019-04-23 Advanced Technology Emission Solutions Inc. Emission control system with controlled induction heating and methods for use therewith
US9488085B2 (en) * 2013-09-18 2016-11-08 Advanced Technology Emission Solutions Inc. Catalytic converter structures with induction heating
US10364720B2 (en) * 2013-09-18 2019-07-30 Advanced Technology Emission Solutions Inc. Methods for inserting wires into a gaseous emissions treatment unit
US10207222B2 (en) * 2013-09-18 2019-02-19 Advanced Technology Emission Solutions Inc. Apparatus and method for gaseous emissions treatment with induction heating of loop conductors
US11060433B2 (en) * 2013-09-18 2021-07-13 Advanced Technology Emission Solutions Inc. Retention of wires in an induction heated gaseous emissions treatment unit
US10143967B2 (en) * 2013-09-18 2018-12-04 Advanced Technology Emission Solutions Inc. Apparatus and method for gaseous emissions treatment with directed induction heating
US10226738B2 (en) * 2013-09-18 2019-03-12 Advanced Technology Emission Solutions Inc. Apparatus and method for gaseous emissions treatment using front end induction heating
CN106640292B (zh) * 2015-09-29 2020-07-14 排放方案先进技术股份有限公司 采用导向感应加热的气态排放物处理装置和方法

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CN114320542A (zh) 2022-04-12

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