EP2947288A1 - Dispositif de chauffage électrique et système de purification d'échappement pour un moteur à combustion interne - Google Patents

Dispositif de chauffage électrique et système de purification d'échappement pour un moteur à combustion interne Download PDF

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Publication number
EP2947288A1
EP2947288A1 EP15169010.4A EP15169010A EP2947288A1 EP 2947288 A1 EP2947288 A1 EP 2947288A1 EP 15169010 A EP15169010 A EP 15169010A EP 2947288 A1 EP2947288 A1 EP 2947288A1
Authority
EP
European Patent Office
Prior art keywords
heat generating
generating member
casing
support member
electric heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15169010.4A
Other languages
German (de)
English (en)
Other versions
EP2947288B1 (fr
Inventor
Daichi Imai
Kazuhiro Itou
Hiromasa Nishioka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
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Toyota Motor Corp
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Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of EP2947288A1 publication Critical patent/EP2947288A1/fr
Application granted granted Critical
Publication of EP2947288B1 publication Critical patent/EP2947288B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater

Definitions

  • the present invention relates to an electric heating device and an exhaust purification system for an internal combustion engine.
  • an exhaust purification system wherein an exhaust purification device such as a particulate filter which traps particulate matter in exhaust gas is arranged inside of an engine exhaust passage, wherein an electric heating device is arranged upstream of the exhaust purification device inside of the exhaust passage, and wherein the exhaust gas from the internal combustion engine is heated by the electric heating device and the heated exhaust gas is used to heat the exhaust purification device.
  • an exhaust purification device such as a particulate filter which traps particulate matter in exhaust gas is arranged inside of an engine exhaust passage
  • an electric heating device is arranged upstream of the exhaust purification device inside of the exhaust passage, and wherein the exhaust gas from the internal combustion engine is heated by the electric heating device and the heated exhaust gas is used to heat the exhaust purification device.
  • an electric heating device wherein a honeycomb-shaped support member is fastened inside a casing through in which exhaust gas flows, wherein a honeycomb-shaped electric type heat generating member is arranged upstream in the flow of exhaust gas of the support member, and wherein the heat generating member is supported by the support member through a supporter (see PTL 1).
  • an electric heating device wherein a support member is fastened inside a casing, wherein a first electric type heat generating member is arranged at one side of the support member in a longitudinal axial direction of the casing and a second electric type heat generating member is arranged at the other side of the support member, wherein each heat generating member is provided with an outer tube and a strip-shaped heat generating element, wherein each outer tube is arranged in the casing so that its center axial line is parallel to a longitudinal axial line of the casing, wherein each heat generating element has two end parts which are fastened to an inner circumferential surface of the corresponding outer tube and an intermediate part which extends between the two end parts without being fastened to the corresponding outer tube, wherein each intermediate part is wound about a winding axial line which is parallel to the center axial line of the corresponding outer tube, wherein a supporter is provided which run from the first heat generating member through the support member to the second heat generating member, wherein
  • the first heat generating member and the second heat generating member are supported by the support member in the state where a winding direction of the intermediate part of the first heat generating member and a winding direction of the intermediate part of the second heat generating member are opposite to each other.
  • the first heat generating member and the second heat generating member have weak heat generating regions, respectively, and the first heat generating member and the second heat generating member are supported by the support member so that the weak heat generating region of the first heat generating member and the weak heat generating region of the second heat generating member substantially do not overlap when viewed along the longitudinal axial line of the casing.
  • the electric heating device is further provided with a fastener which fastens at least part of the supporter to an inside wall surface of the casing.
  • an exhaust purification system for an internal combustion engine wherein an exhaust purification device is arranged in an engine exhaust passage, and wherein an electric heating device according to any one of claims 1 to 4 is arranged upstream of the exhaust purification device inside the exhaust passage, whereby the exhaust gas from the internal combustion engine is heated by the electric heating device and the heated exhaust gas is used to heat the exhaust purification device.
  • an electric heating device A is provided with a cylindrical casing 10. Inside the casing 10, a columnar support member 20 is fastened. In the embodiment which is shown in FIG. 1 , a ring-shaped small diameter part 11 is formed at the casing 10. This small diameter part 11 presses against the support member 20 whereby the support member 20 is fastened to the casing 10.
  • the support member 20 forms a honeycomb structure which is formed from, for example, a ceramic or metal. Therefore, the fluid which flows through the inside of the casing 10 can run through the support member 20 along a longitudinal axial line LC direction of the casing 10.
  • a first electric type heat generating member 30a is arranged, while at the other side of the support member 20 in the longitudinal axial line LC direction of the casing 10 or the downstream side in the flow of fluid, a second electric type heat generating member 30b is arranged.
  • These heat generating members 30a, 30b are supported by the support member 20 through supporters 40.
  • the first heat generating member 30a and the second heat generating member 30b are separated from the casing 10, that is, are supported by the support member 20 without being supported by the casing 10. Further, between the first heat generating member 30a and the support member 20 and between the second heat generating member 30b and the support member 20, slight clearances are provided.
  • the first heat generating member 30a is provided with a cylindrical outer tube 31. Inside the outer tube 31, a strip-shaped heat generating element 32 is held in a state wound about a winding axial line LW.
  • the winding axial line LW matches a center axial line LHC of the outer tube 31.
  • the winding axial line LW does not match the center axial line LHC of the outer tube 31, however, extends in parallel with the center axial line LHC of the outer tube 31.
  • a heat generating element 32 forms a honeycomb structure which is formed by alternately stacking flat plates 33 and corrugated plates 34. Between the flat plates 33 and the corrugated plates 34, flow paths 35 through which the fluid can flow are formed.
  • the outer tube 31, flat plates 33, and corrugated plates 34 are formed from electroconductive materials, for example, metal plates.
  • FIG. 4 shows the state where the heat generating element 32 which is shown in FIG. 2 is unwound and rendered flat.
  • the heat generating element 32 has two end parts 32e, 32e in the length direction LH and an intermediate part 32i which extends between the two end parts 32e, 32e.
  • the heat generating element 32 is fastened and electrically connected to the outer tube 31 at the two end parts 32e, 32e. In this case, the intermediate part 32i is not fastened to the outer tube 31.
  • the heat generating element 32 as shown in FIG. 2 and FIG. 3 , is wound so that a clearance 36 is formed between one part of the intermediate part 32i and another part of the intermediate part 32i.
  • This clearance 36 acts as an electrical insulating member.
  • the first heat generating member 30a further has an electrode 37 which is electrically connected to the heat generating element 32.
  • the electrode 37 is electrically insulated from the outer tube 31 while passing through the outer tube 31 and being electrically connected to the intermediate part 32i of the heat generating element 32.
  • the electrode 37 passes through the casing 10 and extends to the outside of the casing 10. Note that the outer tube 31 is grounded.
  • the first heat generating member 30a and the second heat generating member 30b are arranged inside the casing 10 so that the center axial lines LHC of the outer tubes 31 of the first heat generating member 30a and the second heat generating member 30b match with each other.
  • the center axial lines LHC of the outer tubes 31 of the first heat generating member 30a and the second heat generating member 30b do not match with each other but extend in parallel with each other. Further, in the embodiment which is shown in FIG.
  • the first heat generating member 30a and the second heat generating member 30b are arranged in the casing 10 so that the center axial lines LHC of the outer tubes 31 of the first heat generating member 30a and the second heat generating member 30b match with the longitudinal axial line LC of the casing 10.
  • the flow paths 35 of the above-mentioned heat generating elements 32 extend in parallel with the longitudinal axial line LC of the casing 10.
  • the center axial lines LHC of the outer tubes 31 of the first heat generating member 30a and the second heat generating member 30b do not match with the longitudinal axial line LC of the casing 10, however, are parallel with the longitudinal axial line LC of the casing 10.
  • the above-mentioned supporters 40 run from the first heat generating member 30a through the support member 20 to the second heat generating member 30b.
  • one ends of the supporters 40 are fastened to the first heat generating member 30a
  • the other ends of the supporters 40 are fastened to the second heat generating member 30b
  • intermediate parts of the supporters 40 are fastened to the support member 20.
  • the supporters 40 are fastened to the intermediate parts 32i of the heat generating elements 32.
  • the heat generating element 32 of the first heat generating member 30a and the heat generating element 32 of the second heat generating member 30b are held inside the outer tubes 31 in a state wound around the corresponding winding axial lines LW.
  • a force acts on the heat generating elements 32 in an unwinding direction.
  • the above-mentioned supporters 40 have the action of maintaining the positions of the heat generating elements 32 against such an unwinding force. As a result, the clearances 36 are reliably maintained and occurrence of short-circuits is obstructed.
  • FIG. 5 shows a layout of the first heat generating member 30a and the second heat generating member 30b in the electric heating device A which is shown in FIG. 1 .
  • the winding direction of the heat generating element 32 of the first heat generating member 30a and the winding direction of the heat generating element 32 of the second heat generating member 30b are opposite to each other.
  • the direction of the force unwinding the heat generating element 32 of the first heat generating member 30a and the direction of the force unwinding the heat generating element 32 of the second heat generating member 30b are opposite to each other.
  • the electrodes 37 are electrically connected to a power source (not shown).
  • a power source not shown
  • current flows through the heat generating elements 32 whereby the heat generating elements 32 generate heat and thereby the fluid which runs through the heat generating elements 32 is heated.
  • the fluid is heated by both the first heat generating member 30a and the second heat generating member 30b, so the fluid can be quickly heated. That is, the heating action of the electric heating device A is enhanced.
  • the two heat generating members 30a, 30b are supported by a single support member 20, so the electric heating device A can be made smaller in size.
  • the heat generating members 30a, 30b are fastened to the two ends of the support member 20, so the heat generating members 30a, 30b are stably supported.
  • the incomplete regions 38, 38 the flat plates 33 and corrugated plates 34 are offset from each other in the length direction LH.
  • the above-mentioned electrode 37 is electrically connected to one end 39a in the length direction LH of one side surface of the complete region 39.
  • current flows from the electrode 37 through the complete region 39, and then reaches the outer tube 31 through the other end 39b in the length direction LH of the other side surface of the complete region 39.
  • the incomplete regions 38, 38 will be called the "weak heat generating regions”.
  • the fluid which passes through the weak heat generating regions 38, 38 is not heated much at all.
  • the first heat generating member 30a and the second heat generating member 30b are supported by the support member 20 so that the weak heat generating regions 38 of the first heat generating member 30a and the weak heat generating regions 38 of the second heat generating member 30b substantially do not overlap when viewed along the longitudinal axial line LC of the casing 10.
  • the angular positions of the first heat generating member 30a and the second heat generating member 30b about the longitudinal axial line LC of the casing 10 are set so that the weak heat generating regions 38 of the first heat generating member 30a and the weak heat generating regions 38 of the second heat generating member 30b substantially do not overlap.
  • the fluid which passed through the weak heat generating regions 38 of the first heat generating member 30a and was not heated much at all is blocked from passing through the weak heat generating regions 38 of the second heat generating member 30b, that is, passes through a region which generates heat well. Therefore, a deviation in temperature of the fluid in the radial direction or circumferential direction of the casing 10 is reduced.
  • FIG. 6 shows another embodiment of the layout of the first heat generating member 30a and the second heat generating member 30b.
  • the winding direction of the heat generating element 32 of the first heat generating member 30a and the winding direction of the heat generating element 32 of the second heat generating member 30b is the same directions as each other.
  • the angular positions of the first heat generating member 30a and the second heat generating member 30b about the longitudinal axial line LC of the casing 10 are set so that the weak heat generating regions 38 of the first heat generating member 30a and the weak heat generating regions 38 of the second heat generating member 30b substantially do not overlap each other when viewed along the longitudinal axial line LC of the casing 10. As a result, the variation in temperature of the fluid in the radial direction or circumferential direction of the casing 10 is reduced.
  • FIG. 7 shows another embodiment according to the present invention.
  • the thickness of the support member 20 is made smaller. That is, the plurality of heat generating members 30a, 30b are stably held through the supporters 40, so the support member 20 can be made smaller in size. Therefore, the electric heating device A is made further smaller in size.
  • FIG. 8 shows still another embodiment according to the present invention.
  • fasteners 41 are provided which fasten at least part of the supporters 40 to an inside wall surface of the casing 10. That is, the supporters 40 which adjoin the casing 10 extend running through the first heat generating member 30a and the second heat generating member 30b. At the two ends of these supporters 40, the fasteners 41 which extend outward in the radial direction are connected. As a result, the supporters 40 are fastened through the fasteners 41 to the inside wall surface of the casing 10. As a result, the first heat generating member 30a and the second heat generating member 30b are more stably supported.
  • the fasteners 41 are connected to only one of the upstream side end parts and the downstream side end part of the supporters 40. In a still other embodiment which is not shown, all of the supporters 40 are fastened by fasteners 41 to the inside wall surface of the casing 10.
  • FIG. 9 shows still another embodiment according to the present invention.
  • a first support member 20a and a second support member 20b are arranged separated from each other in the long direction LC and are fastened to the casing 10 at a first small diameter part 11a and a second small diameter part 11b, respectively.
  • a first heat generating member 30a is arranged, between the first support member 20a and the second support member 20b, a second heat generating member 30b is arranged, while downstream of the second support member 20b, a third heat generating member 30c is arranged.
  • These heat generating members 30a, 30b, and 30c are supported by the support members 20a, 20b via supporters 40 which run from the first heat generating member 30a through the first support member 20a and the second support member 20b and reach the third heat generating member 30c.
  • FIG. 10 shows the case of application of the above-mentioned electric heating device A to an exhaust purification system for an internal combustion engine.
  • an internal combustion engine body B is connected through an exhaust pipe C1 to the electric heating device A, while the electric heating device A is connected through an exhaust pipe C2 to the exhaust purification device D.
  • the exhaust purification device D is formed from a particulate filter which traps particulate matter which is contained in the exhaust gas or an exhaust purification catalyst which oxidizes or reduces ingredients in the exhaust gas.
  • the electric heating device A is operated.
  • the exhaust gas is heated by the electric heating device A, and the heated exhaust gas is used to heat the exhaust purification device D.
  • the casing 10 of the electric heating device A is formed from an exhaust pipe of an internal combustion engine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)
EP15169010.4A 2014-05-23 2015-05-22 Dispositif de chauffage électrique et système de purification d'échappement pour un moteur à combustion interne Not-in-force EP2947288B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014107054A JP6064944B2 (ja) 2014-05-23 2014-05-23 電気加熱装置及び内燃機関の排気浄化システム

Publications (2)

Publication Number Publication Date
EP2947288A1 true EP2947288A1 (fr) 2015-11-25
EP2947288B1 EP2947288B1 (fr) 2017-06-28

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EP15169010.4A Not-in-force EP2947288B1 (fr) 2014-05-23 2015-05-22 Dispositif de chauffage électrique et système de purification d'échappement pour un moteur à combustion interne

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EP (1) EP2947288B1 (fr)
JP (1) JP6064944B2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3108678A1 (fr) * 2020-03-31 2021-10-01 Faurecia Systemes D'echappement Organe de chauffage pour un dispositif de purification de gaz d’échappement
WO2023046631A1 (fr) * 2021-09-27 2023-03-30 Vitesco Technologies GmbH Conducteur chauffant pour chauffer un écoulement de gaz d'échappement d'un moteur à combustion interne

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313559A (en) * 1995-02-20 1997-12-03 Emitec Emissionstechnologie Honeycomb body with channels of differing flow resistances through which a fluid can flow
WO2008062916A1 (fr) * 2006-11-23 2008-05-29 Il Jin Electric Co., Ltd. Posttraitement de gaz d'échappement de véhicule à l'aide d'un élément chauffant électrique revêtu d'un catalyseur
DE102007025417A1 (de) * 2007-05-31 2008-12-04 Emitec Gesellschaft Für Emissionstechnologie Mbh Elektrisch beheizbare Wabenkörper-Anordnung mit Stützstiften

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19806033A1 (de) * 1998-02-13 1999-08-19 Emitec Emissionstechnologie Anordnung und Verfahren zur Umsetzung wenigstens einer Abgaskomponente eines Abgasstromes eines Verbrennungsmotors
JP2001244047A (ja) * 2000-02-29 2001-09-07 Denso Corp 通電発熱装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313559A (en) * 1995-02-20 1997-12-03 Emitec Emissionstechnologie Honeycomb body with channels of differing flow resistances through which a fluid can flow
JPH11500205A (ja) 1995-02-20 1999-01-06 エミテツク ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング 流体により貫流される異なった流れ抵抗を有する複数の流路を備えたハニカム体
WO2008062916A1 (fr) * 2006-11-23 2008-05-29 Il Jin Electric Co., Ltd. Posttraitement de gaz d'échappement de véhicule à l'aide d'un élément chauffant électrique revêtu d'un catalyseur
DE102007025417A1 (de) * 2007-05-31 2008-12-04 Emitec Gesellschaft Für Emissionstechnologie Mbh Elektrisch beheizbare Wabenkörper-Anordnung mit Stützstiften

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3108678A1 (fr) * 2020-03-31 2021-10-01 Faurecia Systemes D'echappement Organe de chauffage pour un dispositif de purification de gaz d’échappement
US11352925B2 (en) 2020-03-31 2022-06-07 Faurecia Systemes D'echappement Heating element for an exhaust gas purification device
WO2023046631A1 (fr) * 2021-09-27 2023-03-30 Vitesco Technologies GmbH Conducteur chauffant pour chauffer un écoulement de gaz d'échappement d'un moteur à combustion interne

Also Published As

Publication number Publication date
JP6064944B2 (ja) 2017-01-25
JP2015222053A (ja) 2015-12-10
EP2947288B1 (fr) 2017-06-28

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