JP6064944B2 - Electric heating device and exhaust purification system for internal combustion engine - Google Patents

Electric heating device and exhaust purification system for internal combustion engine Download PDF

Info

Publication number
JP6064944B2
JP6064944B2 JP2014107054A JP2014107054A JP6064944B2 JP 6064944 B2 JP6064944 B2 JP 6064944B2 JP 2014107054 A JP2014107054 A JP 2014107054A JP 2014107054 A JP2014107054 A JP 2014107054A JP 6064944 B2 JP6064944 B2 JP 6064944B2
Authority
JP
Japan
Prior art keywords
heating element
support
heating
casing
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.)
Expired - Fee Related
Application number
JP2014107054A
Other languages
Japanese (ja)
Other versions
JP2015222053A (en
Inventor
大地 今井
大地 今井
伊藤　和浩
和浩 伊藤
寛真 西岡
寛真 西岡
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
Original Assignee
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2014107054A priority Critical patent/JP6064944B2/en
Priority to EP15169010.4A priority patent/EP2947288B1/en
Publication of JP2015222053A publication Critical patent/JP2015222053A/en
Application granted granted Critical
Publication of JP6064944B2 publication Critical patent/JP6064944B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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

Landscapes

  • 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)

Description

本発明は電気加熱装置及び内燃機関の排気浄化システムに関する。   The present invention relates to an electric heating device and an exhaust purification system for an internal combustion engine.

排気ガス中の粒子状物質を捕集するパティキュレートフィルタのような排気浄化装置を機関排気通路内に配置し、排気浄化装置上流の排気通路内に電気加熱装置を配置し、内燃機関からの排気ガスを電気加熱装置により加熱し、加熱された排気ガスにより排気浄化装置を加熱するようにした、排気浄化システムが知られている。   An exhaust purification device such as a particulate filter that collects particulate matter in the exhaust gas is disposed in the engine exhaust passage, an electric heating device is disposed in the exhaust passage upstream of the exhaust purification device, and exhaust from the internal combustion engine There is known an exhaust purification system in which gas is heated by an electric heating device and the exhaust purification device is heated by the heated exhaust gas.

また、排気ガスが流れるケーシング内にハニカム状の支持体を固定し、支持体の排気ガス流れ上流にハニカム状の電気式発熱体を配置し、支持具を介して発熱体を支持体により支持した電気加熱装置が公知である（特許文献１参照）。   Further, a honeycomb-shaped support is fixed in a casing through which exhaust gas flows, and a honeycomb-shaped electric heating element is disposed upstream of the exhaust gas flow of the support, and the heating element is supported by the support via a support. An electric heating device is known (see Patent Document 1).

特開平１１−５００２０５号公報JP-A-11-500205

排気浄化装置の温度を目標温度まで上昇させるのに必要な時間を短縮することが望まれている。この時間短縮は電気加熱装置の加熱作用を強化ことによって達成され、この加熱作用を強化するためには例えば発熱体の数を増やすことによって達成される。   It is desired to shorten the time required to raise the temperature of the exhaust purification device to the target temperature. This time reduction is achieved by enhancing the heating action of the electric heating device, and in order to enhance this heating action, for example, it is achieved by increasing the number of heating elements.

しかしながら、特許文献１の電気加熱装置では、発熱体の数だけでなく発熱体を支持する支持体の数をも増やす必要がある。その結果、電気加熱装置を配置するために大きな空間を要することになる。電気加熱装置を配置可能な空間には限界があることを考えると、加熱作用を強化するにも限界があるということになる。   However, in the electric heating device of Patent Document 1, it is necessary to increase not only the number of heating elements but also the number of supports that support the heating elements. As a result, a large space is required to arrange the electric heating device. Considering that there is a limit in the space in which the electric heating device can be placed, there is a limit in enhancing the heating action.

本発明の一観点によれば、ケーシング内に支持体を固定し、ケーシングの長手軸線方向に関し支持体の一側に第１の電気式発熱体を配置すると共に支持体の他側に第２の電気式発熱体を配置し、各発熱体は外筒と帯状の発熱要素とを備え、各外筒はその中心軸線がケーシングの長手軸線に平行になるようにケーシング内に配置され、各発熱要素は、対応する外筒の内周面に固定された両端部分と、対応する外筒に固定されることなく両端部分同士の間を延びる中間部分と、を有しており、各中間部分は対応する外筒の中心軸線に平行な巻回軸線回りに巻回されており、更に、第１の発熱体から支持体を貫通して第２の発熱体まで延びる支持具を備え、支持具を第１の発熱体の中間部分及び第２の発熱体の中間部分にそれぞれ固定し、それにより支持具を介して第１の発熱体及び第２の発熱体を支持体により支持し、支持体並びに第１の発熱体及び第２の発熱体を流体がケーシングの長手軸線方向に通過可能になっており、ケーシング内を流れる流体を第１の発熱体及び第２の発熱体により加熱するようにした、電気加熱装置が提供される。   According to one aspect of the present invention, a support is fixed in a casing, a first electric heating element is disposed on one side of the support in the longitudinal axis direction of the casing, and a second is formed on the other side of the support. An electric heating element is arranged, each heating element is provided with an outer cylinder and a belt-like heating element, and each outer cylinder is arranged in the casing such that its central axis is parallel to the longitudinal axis of the casing. Has both end portions fixed to the inner peripheral surface of the corresponding outer cylinder, and intermediate portions extending between the both end portions without being fixed to the corresponding outer cylinder, and each intermediate portion corresponds to A support tool that is wound around a winding axis parallel to the central axis of the outer cylinder and that extends from the first heating element to the second heating element. Fixed to the middle part of the first heating element and the middle part of the second heating element, respectively, The first heating element and the second heating element are supported by the support via the support, and the fluid can pass through the support and the first heating element and the second heating element in the longitudinal axis direction of the casing. An electric heating apparatus is provided in which a fluid flowing in the casing is heated by the first heating element and the second heating element.

本発明の別の観点によれば、機関排気通路内に排気浄化装置を配置し、排気浄化装置上流の排気通路内に上述の電気加熱装置を配置し、内燃機関からの排気ガスを電気加熱装置により加熱し、加熱された排気ガスにより排気浄化装置を加熱するようにした、内燃機関の排気浄化システムが提供される。   According to another aspect of the present invention, an exhaust purification device is disposed in the engine exhaust passage, the above-described electric heating device is disposed in the exhaust passage upstream of the exhaust purification device, and the exhaust gas from the internal combustion engine is electrically heated. An exhaust gas purification system for an internal combustion engine is provided in which the exhaust gas purification device is heated by the heated exhaust gas and the exhaust gas purification device is heated by the heated exhaust gas.

加熱作用を強化しつつ電気加熱装置を小型化することができる。   The electric heating device can be reduced in size while enhancing the heating action.

電気加熱装置の断面図である。It is sectional drawing of an electric heating apparatus. 発熱体の正面図である。It is a front view of a heat generating body. 発熱体の部分拡大図である。It is the elements on larger scale of a heat generating body. 巻き戻された発熱要素を示す図である。It is a figure which shows the heating element rewound. 第１の発熱体及び第２の発熱体のレイアウトを示す図である。It is a figure which shows the layout of a 1st heat generating body and a 2nd heat generating body. 第１の発熱体及び第２の発熱体のレイアウトの別の実施例を示す図である。It is a figure which shows another Example of the layout of a 1st heat generating body and a 2nd heat generating body. 本発明による別の実施例を示す電気加熱装置の断面図である。It is sectional drawing of the electric heating apparatus which shows another Example by this invention. 本発明による更に別の実施例を示す電気加熱装置の断面図である。It is sectional drawing of the electric heating apparatus which shows another Example by this invention. 本発明による更に別の実施例を示す電気加熱装置の断面図である。It is sectional drawing of the electric heating apparatus which shows another Example by this invention. 内燃機関の全体図である。1 is an overall view of an internal combustion engine.

図１を参照すると、電気加熱装置Ａは円筒状のケーシング１０を備え、ケーシング１０内には円柱状の支持体２０が固定される。図１に示される実施例では、ケーシング１０に環状の小径部１１が形成され、この小径部１１が支持体２０に圧接されることにより支持体２０がケーシング１０に固定される。支持体２０は例えばセラミック又は金属から形成されたハニカム構造をなしている。したがって、ケーシング１０内を流れる流体が支持体２０をケーシング１０の長手軸線ＬＣ方向に通過可能になっている。   Referring to FIG. 1, the electric heating device A includes a cylindrical casing 10, and a columnar support 20 is fixed in the casing 10. In the embodiment shown in FIG. 1, an annular small diameter portion 11 is formed in the casing 10, and the support 20 is fixed to the casing 10 by pressing the small diameter portion 11 against the support 20. The support 20 has a honeycomb structure formed of, for example, ceramic or metal. Therefore, the fluid flowing in the casing 10 can pass through the support 20 in the direction of the longitudinal axis LC of the casing 10.

ケーシング１０の長手軸線ＬＣ方向に関し支持体２０の一側ないし流体流れ上流側には、第１の電気式発熱体３０ａが配置され、ケーシング１０の長手軸線ＬＣ方向に関し支持体２０の他側ないし流体流れ下流側には、第２の電気式発熱体３０ｂが配置される。これら発熱体３０ａ，３０ｂは支持具４０を介して支持体２０により支持される。この場合、第１の発熱体３０ａ及び第２の発熱体３０ｂはケーシング１０から離間しており、すなわちケーシング１０により支持されることなく支持体２０により支持される。また、第１の発熱体３０ａと支持体２０との間、及び第２の発熱体３０ｂと支持体２０との間にはそれぞれわずかな隙間が設けられる。   A first electric heating element 30a is arranged on one side of the support 20 with respect to the longitudinal axis LC direction of the casing 10 or on the upstream side of the fluid flow, and the other side or fluid of the support 20 with respect to the longitudinal axis LC direction of the casing 10. A second electric heating element 30b is disposed on the downstream side of the flow. These heating elements 30 a and 30 b are supported by the support 20 through the support 40. In this case, the first heating element 30 a and the second heating element 30 b are separated from the casing 10, that is, supported by the support body 20 without being supported by the casing 10. In addition, a slight gap is provided between the first heating element 30 a and the support 20 and between the second heating element 30 b and the support 20.

次に、図２から図４を参照しながら第１の発熱体３０ａについて説明する。第２の発熱体３０ｂは第１の発熱体３０ａと同様であるので説明を省略する。
図２を参照すると、第１の発熱体３０ａは円筒状の外筒３１を備え、外筒３１内には帯状の発熱要素３２が巻回軸線ＬＷ回りに巻回された状態で収容される。図２に示される実施例では、巻回軸線ＬＷは外筒３１の中心軸線ＬＨＣに一致する。図示しない別の実施例では、巻回軸線ＬＷは外筒３１の中心軸線ＬＨＣとは一致せず、しかしながら外筒３１の中心軸線ＬＨＣと平行に延びる。 Next, the first heating element 30a will be described with reference to FIGS. Since the second heating element 30b is similar to the first heating element 30a, the description thereof is omitted.
Referring to FIG. 2, the first heating element 30 a includes a cylindrical outer cylinder 31, and a belt-shaped heating element 32 is accommodated in the outer cylinder 31 in a state of being wound around the winding axis LW. In the embodiment shown in FIG. 2, the winding axis LW coincides with the central axis LHC of the outer cylinder 31. In another embodiment (not shown), the winding axis LW does not coincide with the central axis LHC of the outer cylinder 31, however, it extends in parallel with the central axis LHC of the outer cylinder 31.

発熱要素３２は図３に示されるように、平板３３と波板３４とを交互に積層することにより形成されたハニカム構造をなしており、平板３３と波板３４との間に流体が流通可能な流通路３５が形成されている。外筒３１、平板３３及び波板３４は導電性材料、例えば金属板から形成される。   As shown in FIG. 3, the heating element 32 has a honeycomb structure formed by alternately laminating flat plates 33 and corrugated plates 34, and fluid can flow between the flat plates 33 and the corrugated plates 34. A smooth flow path 35 is formed. The outer cylinder 31, the flat plate 33, and the corrugated plate 34 are made of a conductive material, for example, a metal plate.

図４は、図２に示される発熱要素３２を巻き戻して平坦にした状態を示している。図４を参照すると、発熱要素３２は長さ方向ＬＨの両端部分３２ｅ，３２ｅと、両端部分３２ｅ，３２ｅ同士の間を延びる中間部分３２ｉとを有する。図２に示されるように、発熱要素３２は両端部分３２ｅ，３２ｅにおいて外筒３１に固定されると共に電気的に接続される。この場合、中間部分３２ｉは外筒３１に固定されない。   FIG. 4 shows a state in which the heat generating element 32 shown in FIG. 2 is rewound and flattened. Referring to FIG. 4, the heat generating element 32 has both end portions 32e and 32e in the length direction LH and an intermediate portion 32i extending between the both end portions 32e and 32e. As shown in FIG. 2, the heat generating element 32 is fixed to and electrically connected to the outer cylinder 31 at both end portions 32e and 32e. In this case, the intermediate portion 32 i is not fixed to the outer cylinder 31.

また、発熱要素３２は図２及び図３に示されるように、中間部分３２ｉの一部分と中間部分３２ｉの別部分との間に隙間３６が形成されるように、巻回される。この隙間３６は電気的絶縁体として作用する。   2 and 3, the heat generating element 32 is wound so that a gap 36 is formed between a part of the intermediate part 32i and another part of the intermediate part 32i. This gap 36 acts as an electrical insulator.

第１の発熱体３０ａは更に、発熱要素３２に電気的に接続された電極３７を有する。図２及び図４からわかるように、電極３７は外筒３１から電気的に絶縁されつつ外筒３１を貫通して発熱要素３２の中間部分３２ｉに電気的に接続される。図１に示されるように、電極３７はケーシング１０を貫通してケーシング１０の外部まで延びている。なお、外筒３１は接地されている。   The first heating element 30 a further includes an electrode 37 that is electrically connected to the heating element 32. As can be seen from FIGS. 2 and 4, the electrode 37 penetrates the outer cylinder 31 while being electrically insulated from the outer cylinder 31, and is electrically connected to the intermediate portion 32 i of the heat generating element 32. As shown in FIG. 1, the electrode 37 extends through the casing 10 to the outside of the casing 10. The outer cylinder 31 is grounded.

図１に示される実施例では、第１の発熱体３０ａ及び第２の発熱体３０ｂの外筒３１の中心軸線ＬＨＣが互いに一致するように、第１の発熱体３０ａ及び第２の発熱体３０ｂがケーシング１０内に配置される。図示しない別の実施例では、第１の発熱体３０ａ及び第２の発熱体３０ｂの外筒３１の中心軸線ＬＨＣは互いに一致せず、しかしながら互いに平行に延びる。また、図１に示される実施例では、第１の発熱体３０ａ及び第２の発熱体３０ｂの外筒３１の中心軸線ＬＨＣはケーシング１０の長手軸線ＬＣに一致するように、第１の発熱体３０ａ及び第２の発熱体３０ｂがケーシング１０内に配置される。この場合、上述した発熱要素３２の流通路３５はケーシング１０の長手軸線ＬＣに平行に延びる。図示しない別の実施例では、第１の発熱体３０ａ及び第２の発熱体３０ｂの外筒３１の中心軸線ＬＨＣがケーシング１０の長手軸線ＬＣに一致せず、しかしながらケーシング１０の長手軸線ＬＣに平行に延びる。   In the embodiment shown in FIG. 1, the first heating element 30a and the second heating element 30b are arranged so that the central axes LHC of the outer cylinders 31 of the first heating element 30a and the second heating element 30b coincide with each other. Is disposed in the casing 10. In another embodiment (not shown), the central axes LHC of the outer cylinders 31 of the first heating element 30a and the second heating element 30b do not coincide with each other, but extend parallel to each other. Further, in the embodiment shown in FIG. 1, the first heating element is set so that the central axis LHC of the outer cylinder 31 of the first heating element 30 a and the second heating element 30 b coincides with the longitudinal axis LC of the casing 10. 30 a and the second heating element 30 b are arranged in the casing 10. In this case, the flow path 35 of the heat generating element 32 described above extends in parallel to the longitudinal axis LC of the casing 10. In another embodiment (not shown), the central axis LHC of the outer cylinder 31 of the first heating element 30a and the second heating element 30b does not coincide with the longitudinal axis LC of the casing 10, but is parallel to the longitudinal axis LC of the casing 10. Extend to.

再び図１を参照すると、上述した支持具４０は第１の発熱体３０ａから支持体２０を貫通して第２の発熱体３０ｂまで延びる。図１に示される実施例では、第１の発熱体３０ａに支持具４０の一端が固定され、第２の発熱体３０ｂに支持具４０の他端が固定され、支持体２０に支持具４０の中間部分が固定される。この場合、図２に示されるように、支持具４０は発熱要素３２の中間部分３２ｉに固定される。   Referring to FIG. 1 again, the support 40 described above extends from the first heating element 30a through the support 20 to the second heating element 30b. In the embodiment shown in FIG. 1, one end of the support 40 is fixed to the first heating element 30 a, the other end of the support 40 is fixed to the second heating element 30 b, and the support 40 is fixed to the support 20. The middle part is fixed. In this case, as shown in FIG. 2, the support 40 is fixed to the intermediate portion 32 i of the heat generating element 32.

上述したように第１の発熱体３０ａの発熱要素３２及び第２の発熱体３０ｂの発熱要素３２はそれぞれ対応する巻回軸線ＬＷ回りに巻回された状態で外筒３１内に収容される。この場合、発熱要素３２の弾性により、発熱要素３２には巻き戻す方向の力が作用する。上述の支持具４０はこのような巻き戻す力に抗して発熱要素３２の位置を維持する作用も有する。その結果、隙間３６が確実に維持され、短絡の発生が阻止される。   As described above, the heating element 32 of the first heating element 30a and the heating element 32 of the second heating element 30b are accommodated in the outer cylinder 31 in a state of being wound around the corresponding winding axis LW. In this case, due to the elasticity of the heat generating element 32, a force in a rewinding direction acts on the heat generating element 32. The support 40 described above also has an action of maintaining the position of the heat generating element 32 against such a rewinding force. As a result, the gap 36 is reliably maintained and the occurrence of a short circuit is prevented.

図５は、図１に示される電気加熱装置Ａにおける第１の発熱体３０ａ及び第２の発熱体３０ｂのレイアウトを示している。図５に示される実施例では、第１の発熱体３０ａの発熱要素３２の巻回方向と第２の発熱体３０ｂの発熱要素３２の巻回方向とが互いに逆向きになっている。このようにすると、第１の発熱体３０ａの発熱要素３２を巻き戻す力の向きと、第２の発熱体３０ｂの発熱要素３２を巻き戻す力の向きとが互いに逆向きになる。その結果、第１の発熱体３０ａの発熱要素３２を巻き戻す力と、第２の発熱体３０ｂの発熱要素３２を巻き戻す力とが支持具４０を介し互いに打ち消される。したがって、発熱要素３２の位置が確実に維持される。   FIG. 5 shows a layout of the first heating element 30a and the second heating element 30b in the electric heating device A shown in FIG. In the embodiment shown in FIG. 5, the winding direction of the heating element 32 of the first heating element 30a and the winding direction of the heating element 32 of the second heating element 30b are opposite to each other. If it does in this way, the direction of the force which rewinds the heat generating element 32 of the 1st heat generating body 30a and the direction of the force which rewinds the heat generating element 32 of the 2nd heat generating body 30b will be mutually opposite. As a result, the force to rewind the heating element 32 of the first heating element 30a and the force to unwind the heating element 32 of the second heating element 30b are canceled out via the support tool 40. Therefore, the position of the heat generating element 32 is reliably maintained.

さて、第１の発熱体３０ａ及び第２の発熱体３０ｂを作動すべきときには、電極３７が電源（図示しない）に電気的に接続される。その結果、発熱要素３２内を電流が流れて発熱要素３２が発熱し、それにより発熱要素３２を通過する流体が加熱される。この場合、流体が第１の発熱体３０ａ及び第２の発熱体３０ｂ両方により加熱されるので、流体を速やかに加熱することができる。すなわち、電気加熱装置Ａの加熱作用が高められる。しかも、２つの発熱体３０ａ，３０ｂが１つの支持体２０により支持されるので、電気加熱装置Ａを小型化することができる。更に、支持体２０の両端に発熱体３０ａ，３０ｂが固定されるので、発熱体３０ａ，３０ｂが安定的に支持される。   Now, when the first heating element 30a and the second heating element 30b are to be operated, the electrode 37 is electrically connected to a power source (not shown). As a result, a current flows through the heat generating element 32 and the heat generating element 32 generates heat, whereby the fluid passing through the heat generating element 32 is heated. In this case, since the fluid is heated by both the first heating element 30a and the second heating element 30b, the fluid can be quickly heated. That is, the heating action of the electric heating device A is enhanced. Moreover, since the two heating elements 30a and 30b are supported by the single support 20, the electric heating device A can be reduced in size. Furthermore, since the heating elements 30a and 30b are fixed to both ends of the support 20, the heating elements 30a and 30b are stably supported.

ところで、平板３３及び波板３４の積層体を巻回することにより発熱要素３２を形成すると、図４に示されるように、両端部分３２ｅ，３２ｅの周りには不完全領域３８，３８が形成され、これら不完全領域３８，３８同士間に完全領域３９が形成される。すなわち、発熱要素３２が所定枚数の平板３３及び波板３４を積層することにより形成されるとすると、完全領域３９を構成する平板３３及び波板３４の数は上記所定枚数に等しいけれども、不完全領域３８，３８を構成する平板３３及び波板３４の数は上記所定枚数よりも少なくなっている。不完全領域３８，３８では平板３３及び波板３４が長さ方向ＬＨに互いにずれるからである。その上で、上述した電極３７は完全領域３９の一側面であって長さ方向ＬＨの一端３９ａに電気的に接続される。その結果、電流は電極３７から完全領域３９内を流れ、次いで完全領域３９の他側面であって長さ方向ＬＨの他端３９ｂを介して外筒３１に到る。ここで、完全領域３９内を電流がほぼ均等に流れるようにすると、不完全領域３８，３８には電流がほとんど流れず、したがって不完全領域３８，３８はほとんど発熱しない。そこで、不完全領域３８，３８を弱発熱領域と称することにする。弱発熱領域３８，３８を通過した流体はほとんど加熱されない。   By the way, when the heat generating element 32 is formed by winding a laminate of the flat plate 33 and the corrugated plate 34, imperfect regions 38, 38 are formed around both end portions 32e, 32e as shown in FIG. A complete region 39 is formed between the incomplete regions 38 and 38. That is, if the heating element 32 is formed by laminating a predetermined number of flat plates 33 and corrugated plates 34, the number of the flat plates 33 and corrugated plates 34 constituting the complete region 39 is equal to the predetermined number, but incomplete. The number of flat plates 33 and corrugated plates 34 constituting the regions 38, 38 is smaller than the predetermined number. This is because the flat plate 33 and the corrugated plate 34 are shifted from each other in the length direction LH in the imperfect regions 38 and 38. In addition, the electrode 37 described above is electrically connected to one end 39a in the length direction LH on one side surface of the complete region 39. As a result, current flows from the electrode 37 in the complete region 39, and then reaches the outer cylinder 31 via the other side 39b in the length direction LH on the other side of the complete region 39. Here, if the current flows almost uniformly in the complete region 39, almost no current flows in the incomplete regions 38, 38, and therefore the incomplete regions 38, 38 generate little heat. Therefore, the incomplete regions 38 and 38 are referred to as weak heat generation regions. The fluid that has passed through the weak heat generating regions 38, 38 is hardly heated.

この点、図５に示される実施例では、ケーシング１０の長手軸線ＬＣに沿って見たときに第１の発熱体３０ａの弱発熱領域３８と第２の発熱体３０ｂの弱発熱領域３８とが互いにほぼ重ならないように、第１の発熱体３０ａ及び第２の発熱体３０ｂが支持体２０に支持される。言い換えると、第１の発熱体３０ａの弱発熱領域３８と第２の発熱体３０ｂの弱発熱領域３８とが互いにほぼ重ならないように、ケーシング１０の長手軸線ＬＣ回りの第１の発熱体３０ａ及び第２の発熱体３０ｂの角度位置が設定される。その結果、第１の発熱体３０ａの弱発熱領域３８を通過しほとんど加熱されなかった流体が第２の発熱体３０ｂの弱発熱領域３８を通過するのが阻止され、すなわち良好に発熱している領域を通過する。したがって、ケーシング１０の半径方向ないし周方向に関する流体の温度のバラツキが低減される。   In this regard, in the embodiment shown in FIG. 5, when viewed along the longitudinal axis LC of the casing 10, the weak heat generation region 38 of the first heat generating body 30 a and the weak heat generation region 38 of the second heat generating body 30 b are formed. The first heating element 30a and the second heating element 30b are supported by the support 20 so as not to overlap each other. In other words, the first heating element 30a around the longitudinal axis LC of the casing 10 and the weak heating area 38 of the first heating element 30a and the weak heating area 38 of the second heating element 30b do not substantially overlap each other. The angular position of the second heating element 30b is set. As a result, the fluid that has hardly passed through the weak heating region 38 of the first heating element 30a is prevented from passing through the weak heating region 38 of the second heating element 30b, that is, heat is generated well. Go through the area. Therefore, the temperature variation of the fluid in the radial direction or the circumferential direction of the casing 10 is reduced.

図６は、第１の発熱体３０ａ及び第２の発熱体３０ｂのレイアウトの別の実施例を示している。図６に示される実施例では、第１の発熱体３０ａの発熱要素３２の巻回方向と第２の発熱体３０ｂの発熱要素３２の巻回方向とが互いに同じ向きになっている。また、ケーシング１０の長手軸線ＬＣに沿って見たときに第１の発熱体３０ａの弱発熱領域３８と第２の発熱体３０ｂの弱発熱領域３８とが互いにほぼ重ならないように、ケーシング１０の長手軸線ＬＣ回りの第１の発熱体３０ａ及び第２の発熱体３０ｂの角度位置が設定される。その結果、ケーシング１０の半径方向ないし周方向に関する流体の温度のバラツキが低減される。   FIG. 6 shows another embodiment of the layout of the first heating element 30a and the second heating element 30b. In the embodiment shown in FIG. 6, the winding direction of the heating element 32 of the first heating element 30a and the winding direction of the heating element 32 of the second heating element 30b are the same. Further, when viewed along the longitudinal axis LC of the casing 10, the weak heating region 38 of the first heating element 30a and the weak heating region 38 of the second heating element 30b do not substantially overlap each other. The angular positions of the first heating element 30a and the second heating element 30b around the longitudinal axis LC are set. As a result, the temperature variation of the fluid in the radial direction or the circumferential direction of the casing 10 is reduced.

図７は本発明による別の実施例を示している。図７に示される例では、図１に示される実施例に比べて、支持体２０の厚さが小さくされる。すなわち、複数の発熱体３０ａ，３０ｂが支持具４０を介して安定的に保持されるので、支持体２０を小さくすることができる。したがって、電気加熱装置Ａが更に小型化される。   FIG. 7 shows another embodiment according to the present invention. In the example shown in FIG. 7, the thickness of the support 20 is made smaller than in the embodiment shown in FIG. That is, since the plurality of heating elements 30a and 30b are stably held via the support 40, the support 20 can be made small. Therefore, the electric heating device A is further downsized.

図８は本発明による更に別の実施例を示している。図８に示される実施例では、支持具４０の少なくとも一部をケーシング１０の内壁面に固定する固定具４１が設けられる。すなわち、ケーシング１０に隣接する支持具４０が第１の発熱体３０ａ及び第２の発熱体３０ｂをそれぞれ貫通して延びており、これら支持具４０の両端に、半径方向外向きに延びる固定具４１が連結される。その結果、支持具４０が固定具４１を介してケーシング１０の内壁面に固定される。その結果、第１の発熱体３０ａ及び第２の発熱体３０ｂがより安定に支持される。図示しない別の実施例では、支持具４０の上流側端部及び下流側端部の一方にのみ固定具４１が連結される。図示しない更に別の実施例では、支持具４０のすべてが固定具４１によりケーシング１０の内壁面に固定される。   FIG. 8 shows a further embodiment according to the present invention. In the embodiment shown in FIG. 8, a fixture 41 that fixes at least a part of the support 40 to the inner wall surface of the casing 10 is provided. That is, the support tool 40 adjacent to the casing 10 extends through the first heating element 30a and the second heating element 30b, and the fixing tool 41 extends radially outward at both ends of the support tool 40. Are concatenated. As a result, the support tool 40 is fixed to the inner wall surface of the casing 10 via the fixing tool 41. As a result, the first heating element 30a and the second heating element 30b are supported more stably. In another embodiment (not shown), the fixture 41 is connected to only one of the upstream end and the downstream end of the support 40. In yet another embodiment (not shown), all of the support tool 40 is fixed to the inner wall surface of the casing 10 by the fixing tool 41.

図９は本発明による更に別の実施例を示している。図９に示される実施例では、ケーシング１０内に第１の支持体２０ａ及び第２の支持体２０ｂが長手方向ＬＣに離間して配置され、第１の小径部１１ａ及び第２の小径部１１ｂにおいてケーシング１０に固定される。第１の支持体２０ａの上流には第１の発熱体３０ａが配置され、第１の支持体２０ａと第２の支持体２０ｂとの間には第２の発熱体３０ｂが配置され、第２の支持体２０ｂの下流には第３の発熱体３０ｃが配置される。これら発熱体３０ａ，３０ｂ，３０ｃは第１の発熱体３０ａから第１の支持体２０ａ及び第２の支持体２０ｂを貫通して第３の発熱体３０ｃまで延びる支持具４０を介し、支持体２０ａ，２０ｂにより支持される。   FIG. 9 shows a further embodiment according to the present invention. In the embodiment shown in FIG. 9, the first support 20a and the second support 20b are arranged in the casing 10 so as to be spaced apart in the longitudinal direction LC, and the first small diameter portion 11a and the second small diameter portion 11b. In FIG. A first heating element 30a is disposed upstream of the first support 20a, a second heating element 30b is disposed between the first support 20a and the second support 20b, and a second A third heating element 30c is disposed downstream of the support 20b. The heating elements 30a, 30b, and 30c are supported by a support member 20a via a support 40 that extends from the first heating element 30a through the first support member 20a and the second support member 20b to the third heating element 30c. , 20b.

図１０は上述の電気加熱装置Ａを内燃機関の排気浄化システムに適用した場合を示している。図１０を参照すると、内燃機関本体Ｂは排気管Ｃ１を介して電気加熱装置Ａに連結され、電気加熱装置Ａは排気管Ｃ２を介して排気浄化装置Ｄに連結される。排気浄化装置Ｄは排気ガス中に含まれる粒子状物質を捕集するパティキュレートフィルタ、又は排気ガス中の成分を酸化又は還元する排気浄化触媒から形成される。排気浄化装置Ｄの温度を上昇させるべきときには電気加熱装置Ａが作動される。その結果、排気ガスが電気加熱装置Ａによって加熱され、加熱された排気ガスにより排気浄化装置Ｄが加熱される。図示しない別の実施例では、電気加熱装置Ａのケーシング１０が内燃機関の排気管から形成される。   FIG. 10 shows a case where the above-described electric heating device A is applied to an exhaust gas purification system for an internal combustion engine. Referring to FIG. 10, the internal combustion engine main body B is connected to the electric heating device A via the exhaust pipe C1, and the electric heating device A is connected to the exhaust purification device D via the exhaust pipe C2. The exhaust purification device D is formed from a particulate filter that collects particulate matter contained in the exhaust gas, or an exhaust purification catalyst that oxidizes or reduces components in the exhaust gas. When the temperature of the exhaust purification device D is to be raised, the electric heating device A is activated. As a result, the exhaust gas is heated by the electric heating device A, and the exhaust purification device D is heated by the heated exhaust gas. In another embodiment not shown, the casing 10 of the electric heating device A is formed from the exhaust pipe of an internal combustion engine.

Ａ 電気加熱装置
１０ ケーシング
２０ 支持体
３０ａ 第１の発熱体
３０ｂ 第２の発熱体
３１ 外筒
３２ 発熱要素
３２ｅ 両端部分
３２ｉ 中間部分
４０ 支持具 A electric heating device 10 casing 20 support 30a first heating element 30b second heating element 31 outer cylinder 32 heating element 32e both end portions 32i intermediate portion 40 support

Claims (5)

ケーシング内に支持体を固定し、ケーシングの長手軸線方向に関し支持体の一側に第１の電気式発熱体を配置すると共に支持体の他側に第２の電気式発熱体を配置し、各発熱体は外筒と帯状の発熱要素とを備え、各外筒はその中心軸線がケーシングの長手軸線に平行になるようにケーシング内に配置され、各発熱要素は、対応する外筒の内周面に固定された両端部分と、対応する外筒に固定されることなく両端部分同士の間を延びる中間部分と、を有しており、各中間部分は対応する外筒の中心軸線に平行な巻回軸線回りに巻回されており、更に、第１の発熱体から支持体を貫通して第２の発熱体まで延びる支持具を備え、支持具を第１の発熱体の中間部分及び第２の発熱体の中間部分にそれぞれ固定し、それにより支持具を介して第１の発熱体及び第２の発熱体を支持体により支持し、支持体並びに第１の発熱体及び第２の発熱体を流体がケーシングの長手軸線方向に通過可能になっており、ケーシング内を流れる流体を第１の発熱体及び第２の発熱体により加熱するようにした、電気加熱装置。   A support is fixed in the casing, a first electric heating element is disposed on one side of the support with respect to the longitudinal axis direction of the casing, and a second electric heating element is disposed on the other side of the support, The heating element includes an outer cylinder and a belt-like heating element, and each outer cylinder is disposed in the casing so that its central axis is parallel to the longitudinal axis of the casing, and each heating element is arranged on the inner circumference of the corresponding outer cylinder. Both end portions fixed to the surface and intermediate portions extending between both end portions without being fixed to the corresponding outer cylinder, each intermediate portion being parallel to the central axis of the corresponding outer cylinder A support member that is wound around the winding axis and that extends from the first heating element to the second heating element through the support member; Each of which is fixed to the middle part of the two heating elements, thereby allowing the first The body and the second heating element are supported by the support, and the fluid can pass through the support and the first heating element and the second heating element in the longitudinal axis direction of the casing. An electric heating device that is heated by a first heating element and a second heating element. 前記第１の発熱体の前記中間部分の巻回方向及び前記第２の発熱体の前記中間部分の巻回方向が互いに逆向きの状態で前記第１の発熱体及び前記第２の発熱体が前記支持体に支持される、請求項１に記載の電気加熱装置。   The first heating element and the second heating element are in a state where the winding direction of the intermediate part of the first heating element and the winding direction of the intermediate part of the second heating element are opposite to each other. The electric heating device according to claim 1, wherein the electric heating device is supported by the support. 前記第１の発熱体及び前記第２の発熱体がそれぞれ弱発熱領域を有しており、前記ケーシングの長手軸線に沿って見たときに前記第１の発熱体の前記弱発熱領域と前記第２の発熱体の前記弱発熱領域とが互いにほぼ重ならないように前記第１の発熱体及び前記第２の発熱体が前記支持体に支持される、請求項１又は２に記載の電気加熱装置。   Each of the first heating element and the second heating element has a weak heating area, and when viewed along the longitudinal axis of the casing, the weak heating area and the first heating element of the first heating element. 3. The electric heating device according to claim 1, wherein the first heating element and the second heating element are supported by the support so that the weak heating area of the two heating elements does not substantially overlap each other. . 更に、前記支持具の少なくとも一部を前記ケーシングの内壁面に固定する固定具を備える、請求項１から３までのいずれか一項に記載の電気加熱装置。   Furthermore, the electric heating apparatus as described in any one of Claim 1 to 3 provided with the fixing tool which fixes at least one part of the said support tool to the inner wall face of the said casing. 機関排気通路内に排気浄化装置を配置し、排気浄化装置上流の排気通路内に請求項１から４までのいずれか一項に記載の電気加熱装置を配置し、内燃機関からの排気ガスを前記電気加熱装置により加熱し、加熱された排気ガスにより前記排気浄化装置を加熱するようにした、内燃機関の排気浄化システム。   An exhaust purification device is disposed in the engine exhaust passage, the electric heating device according to any one of claims 1 to 4 is disposed in the exhaust passage upstream of the exhaust purification device, and exhaust gas from an internal combustion engine is supplied to the exhaust passage. An exhaust gas purification system for an internal combustion engine, wherein the exhaust gas purification device is heated by an electric heating device and the exhaust gas purification device is heated by the heated exhaust gas.
JP2014107054A 2014-05-23 2014-05-23 Electric heating device and exhaust purification system for internal combustion engine Expired - Fee Related JP6064944B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2014107054A JP6064944B2 (en) 2014-05-23 2014-05-23 Electric heating device and exhaust purification system for internal combustion engine
EP15169010.4A EP2947288B1 (en) 2014-05-23 2015-05-22 Electric heating device and exhaust purification system for an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014107054A JP6064944B2 (en) 2014-05-23 2014-05-23 Electric heating device and exhaust purification system for internal combustion engine

Publications (2)

Publication Number Publication Date
JP2015222053A JP2015222053A (en) 2015-12-10
JP6064944B2 true JP6064944B2 (en) 2017-01-25

Family

ID=53268690

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014107054A Expired - Fee Related JP6064944B2 (en) 2014-05-23 2014-05-23 Electric heating device and exhaust purification system for internal combustion engine

Country Status (2)

Country Link
EP (1) EP2947288B1 (en)
JP (1) JP6064944B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3108678B1 (en) * 2020-03-31 2022-04-22 Faurecia Systemes Dechappement Heating element for an exhaust gas purification device
DE102021210761A1 (en) * 2021-09-27 2023-03-30 Vitesco Technologies GmbH Heating conductor for heating an exhaust gas stream of an internal combustion engine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19505727A1 (en) * 1995-02-20 1996-08-22 Emitec Emissionstechnologie Device for the catalytic conversion of exhaust gases in an exhaust system
DE19806033A1 (en) * 1998-02-13 1999-08-19 Emitec Emissionstechnologie Arrangement and method for implementing at least one exhaust gas component of an exhaust gas stream of an internal combustion engine
JP2001244047A (en) * 2000-02-29 2001-09-07 Denso Corp Electric heater device
WO2008062916A1 (en) * 2006-11-23 2008-05-29 Il Jin Electric Co., Ltd. Vehicle exhaust aftertreatment using catalytic coated electric heater
DE102007025417A1 (en) * 2007-05-31 2008-12-04 Emitec Gesellschaft Für Emissionstechnologie Mbh Electrically heatable honeycomb arrangement with support pins

Also Published As

Publication number Publication date
JP2015222053A (en) 2015-12-10
EP2947288B1 (en) 2017-06-28
EP2947288A1 (en) 2015-11-25

Similar Documents

Publication Publication Date Title
KR101454141B1 (en) Connection of two exhaust gas treatment device to each other
JP6064944B2 (en) Electric heating device and exhaust purification system for internal combustion engine
JP6568378B2 (en) Electric heating type catalyst
JP2012517212A5 (en)
KR20110139316A (en) Honeycomb body heatable in multiple stages
US20170218817A1 (en) Supporting structure, device for treating exhaust gases, and method for the production thereof
JP6113164B2 (en) Exhaust gas treatment equipment
JP5531925B2 (en) Electric heating type catalyst
JP6478634B2 (en) Exhaust gas treatment equipment
JP2019173600A (en) Exhaust emission control device for internal combustion engine
JP6036716B2 (en) Catalytic converter device
JP6494100B2 (en) Fluid heating device
JP2015029928A5 (en)
WO2020203859A1 (en) Exhaust gas heating device
JP7185409B2 (en) heating unit
JP2018178768A (en) Catalyst device of internal combustion engine
JP2012041875A (en) Catalytic converter device
JP2013065678A (en) Laminated coil
JP2019073985A (en) Catalyst device
JP2018202278A (en) Catalyst device
JP6977230B2 (en) Piping heating device
WO2020032003A1 (en) Catalyst device
WO2009019315A2 (en) Overheated steam generator
JP6746136B2 (en) Fluid heating device
JP2016092975A (en) Stator of rotary electric machine

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20160614

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20161122

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20161205

R151 Written notification of patent or utility model registration

Ref document number: 6064944

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

LAPS Cancellation because of no payment of annual fees