JP7004976B2

JP7004976B2 - Regeneration system for fuel supply equipment and fine particle removal filter

Info

Publication number: JP7004976B2
Application number: JP2018022653A
Authority: JP
Inventors: 和弘山本; 智一江田; 清孝鈴木; 照昌金井; 圭太宮嶋; 圭太郎末田
Original assignee: Noritake Co Ltd; Tokai National Higher Education and Research System NUC
Current assignee: Noritake Co Ltd; Tokai National Higher Education and Research System NUC
Priority date: 2018-02-12
Filing date: 2018-02-12
Publication date: 2022-01-21
Anticipated expiration: 2038-02-12
Also published as: JP2019138229A

Description

本発明は、内燃機関の排気管内に設置された酸化触媒及び微粒子除去フィルタに向けて、燃料を供給する燃料供給装置、及び、これを用いた微粒子除去フィルタの再生システムに関する。 The present invention relates to a fuel supply device that supplies fuel to an oxidation catalyst and a fine particle removal filter installed in an exhaust pipe of an internal combustion engine, and a regeneration system for the fine particle removal filter using the fuel supply device.

従来から、ディーゼルエンジン、ガソリンエンジンなどの内燃機関の排気ガスからＰＭ（Particulate Matter；粒子状物質）を除去するため、ＤＰＦ（Diesel Particulate Filter），ＧＰＦ（Gasoline Particulate Filter）などの微粒子除去フィルタが用いられる。例えば、ＤＰＦを排気管に接続して排気ガスからＰＭを捕集すると共に、ＤＰＦの上流側に設けたＤＯＣ（Diesel Oxidation Catalyst；酸化触媒)で排気ガス中のＮＯ_XをＮＯ₂とし、このＮＯ₂の酸化力でＰＭを酸化（燃焼）させてＰＭを除去することが行われる。 Conventionally, a particulate filter such as DPF (Diesel Particulate Filter) and GPF (Gasoline Particulate Filter) has been used to remove PM (Particulate Matter) from the exhaust gas of internal combustion engines such as diesel engines and gasoline engines. Be done. For example, the DPF is connected to the exhaust pipe to collect PM from the exhaust gas, and the NO _X in the exhaust gas is set to NO ₂ by the DOC (Diesel Oxidation Catalyst) provided on the upstream side of the DPF. The PM is removed by oxidizing (burning) the PM with the oxidizing power of ₂ .

但し、ＰＭの除去が十分でなく、ＤＰＦにＰＭが堆積した場合には、排気ガス中に未燃の燃料を添加し、この燃料をＤＯＣで酸化燃焼させて排気ガスの温度を昇温させ、ＤＰＦに堆積したＰＭを強制的に燃焼除去する、いわゆるＤＰＦの再生を行う。排気ガスに未燃の燃料を添加する手法には、燃焼行程を終えた直後のエンジン筒内に燃料インジェクタから未燃燃料を噴射するポスト噴射や、ＤＯＣよりも上流側の排気管に設けた排気管インジェクタから未燃燃料を噴射する排気管噴射が知られている。 However, if PM is not sufficiently removed and PM is deposited on the DPF, unburned fuel is added to the exhaust gas, and this fuel is oxidatively combusted by the DOC to raise the temperature of the exhaust gas. The so-called DPF regeneration is performed by forcibly burning and removing the PM accumulated on the DPF. The method of adding unburned fuel to the exhaust gas includes post-injection that injects unburned fuel from the fuel injector into the engine cylinder immediately after the combustion stroke, and exhaust provided in the exhaust pipe on the upstream side of the DOC. Exhaust pipe injection that injects unburned fuel from a pipe injector is known.

このうち、ポスト噴射では、従来のエンジンシステムの構成のままで実行可能であるが、エンジン筒内のオイル希釈、排気ガスのスモーク発生、運転性への影響などの問題がある。
一方、排気管噴射では、上述の問題を発生させることなく排気ガスを昇温し、ＤＰＦ再生を行うことができる。 Of these, post-injection can be carried out with the configuration of the conventional engine system, but there are problems such as oil dilution in the engine cylinder, smoke generation of exhaust gas, and influence on operability.
On the other hand, in the exhaust pipe injection, the exhaust gas can be heated in temperature and DPF regeneration can be performed without causing the above-mentioned problem.

特許第５７２０２２９号公報Japanese Patent No. 5720229 特開２０１３－１０８４４４号公報Japanese Unexamined Patent Publication No. 2013-108444

しかしながら、排気管噴射に用いる排気管インジェクタは、構造が複雑である。また、排気管噴射では、ＤＯＣの上流に配置する排気管インジェクタからＤＯＣまでの距離を十分確保できないために、噴射した燃料液滴が排気管内壁に付着して、ＤＰＦ再生に寄与しない無駄な燃料が発生する場合がある。また、排気ガス中に燃料(液滴)を十分に分散して供給し難く、多くの燃料を噴射した場合には、ＤＯＣで燃料液滴の一部を酸化できず白煙を生じる場合も有る。 However, the structure of the exhaust pipe injector used for the exhaust pipe injection is complicated. Further, in the exhaust pipe injection, since the distance from the exhaust pipe injector arranged upstream of the DOC to the DOC cannot be sufficiently secured, the injected fuel droplets adhere to the inner wall of the exhaust pipe, which is a wasteful fuel that does not contribute to DPF regeneration. May occur. In addition, it is difficult to sufficiently disperse and supply fuel (droplets) in the exhaust gas, and when a large amount of fuel is injected, a part of the fuel droplets cannot be oxidized by the DOC and white smoke may be generated. ..

本発明は、かかる問題点に鑑みてなされたものであって、簡単な構造でありながら、排気ガスに適切に分散した燃料を排気管内に供給できる燃料供給装置、及び、これを用いた微粒子除去フィルタの再生システムを提供する。 The present invention has been made in view of the above problems, and is a fuel supply device capable of supplying fuel appropriately dispersed in exhaust gas into an exhaust pipe while having a simple structure, and fine particle removal using the fuel supply device. Provides a filter playback system.

上記課題を解決するための本発明の一態様は、内燃機関の排気管内に燃料を供給する燃料供給装置であって、上記排気管に装着され、上記排気管内に上記燃料の蒸気を放散する燃料放散部と、上記燃料放散部に上記燃料を提供する燃料提供部と、を備え、上記燃料放散部は、上記排気管内を流通する排気ガスに接し、かつ、多孔質セラミック体で構成され、上記燃料提供部から供給された上記燃料がしみ出す燃料滲み出し面を有し、前記燃料放散部は、前記燃料提供部から提供された前記燃料を一時的に収容し先端側に溜める収容部を有し、上記収容部の内壁面のうち、上記収容部内に収容され溜められた上記燃料が触れる接触内壁面の少なくとも一部が、前記燃料滲みだし面をなす前記多孔質セラミック体で構成されてなる燃料供給装置である。 One aspect of the present invention for solving the above problems is a fuel supply device for supplying fuel into the exhaust pipe of an internal combustion engine, which is mounted on the exhaust pipe and dissipates the vapor of the fuel into the exhaust pipe. The fuel dissipating section is provided with a dissipating section and a fuel providing section for supplying the fuel to the fuel dissipating section, and the fuel dissipating section is in contact with the exhaust gas flowing in the exhaust pipe and is composed of a porous ceramic body. The fuel exuding surface has a fuel exuding surface from which the fuel supplied from the fuel supply unit exudes, and the fuel dissipating unit has an accommodating unit for temporarily accommodating the fuel provided from the fuel providing unit and storing the fuel on the tip side. However, of the inner wall surface of the accommodating portion, at least a part of the contact inner wall surface to which the fuel stored and stored in the accommodating portion comes into contact is composed of the porous ceramic body forming the fuel exudation surface. It is a fuel supply device.

本発明の燃料供給装置では、燃料放散部のうち多孔質セラミック体の燃料滲み出し面から燃料の蒸気を放散する。このため、燃料噴射の機構などが不要であり、構造が簡単である。また、排気管インジェクタのように、噴射された燃料液滴が排気管の内壁面に付着し、微粒子除去フィルタの再生に寄与しない無駄な燃料が生じることがなく、燃料を排気ガス中に適切に分散して、酸化触媒及び微粒子除去フィルタなどに向けて供給できる。
また、この燃料供給装置では、燃料放散部に燃料を一時的に収容する収容部を有しており、この収容部の接触内壁面の少なくとも一部が、燃料滲みだし面をなす前記多孔質セラミック体で構成されている。このため、収容部に提供された燃料を、燃料滲みだし面をなす多孔質セラミック体を通じて、速やかに燃料滲み出し面から滲み出させることができる。 In the fuel supply device of the present invention, the vapor of the fuel is dissipated from the fuel exuding surface of the porous ceramic body in the fuel dissipating portion. Therefore, a fuel injection mechanism or the like is not required, and the structure is simple. Further, unlike the exhaust pipe injector, the injected fuel droplets do not adhere to the inner wall surface of the exhaust pipe, and wasteful fuel that does not contribute to the regeneration of the fine particle removal filter is not generated, and the fuel is appropriately put into the exhaust gas. It can be dispersed and supplied to an oxidation catalyst, a fine particle removal filter, and the like.
Further, this fuel supply device has an accommodating portion for temporarily accommodating fuel in the fuel dissipating portion, and at least a part of the contact inner wall surface of the accommodating portion forms the fuel exuding surface of the porous ceramic. It is made up of the body. Therefore, the fuel provided to the accommodating portion can be rapidly exuded from the fuel exuding surface through the porous ceramic body forming the fuel exuding surface.

なお、多孔質セラミック体の燃料滲み出し面は、排気管内を流通する排気ガスに接する面で、かつ、燃料が滲み出す面であり、燃料放散部のうち排気管内に位置する部分の全面を構成していても良いし、一部の面を構成していても良い。また、多孔質セラミック体を排気管の内壁面の一部をなす形態とし、多孔質セラミック体の内壁面を燃料滲み出し面に構成しても良い。また、排気管自体あるいは排気管に接続した部材を用いて、排気管に径方向外側に膨出した膨出部を形成し、この膨出部内に、燃料滲み出し面の一部または全部を位置させる形態としても良い。 The fuel exudation surface of the porous ceramic body is a surface in contact with the exhaust gas flowing in the exhaust pipe and a surface through which the fuel exudes, and constitutes the entire surface of the fuel dissipating portion located in the exhaust pipe. It may be done, or it may form a part of the surface. Further, the porous ceramic body may be formed as a part of the inner wall surface of the exhaust pipe, and the inner wall surface of the porous ceramic body may be formed as a fuel exuding surface. Further, using the exhaust pipe itself or a member connected to the exhaust pipe, a bulging portion that bulges outward in the radial direction is formed in the exhaust pipe, and a part or all of the fuel exudation surface is positioned in the bulging portion. It may be a form to make it.

また、燃料放散部の外形形状としては、棒状、半球状、円筒の周方向一部の形状などが挙げられ、燃料放散部の燃料滲み出し面は、燃料放散部の全部または一部をなす形状が挙げられる。
多孔質セラミック体をなす多孔質セラミックとしては、アルミナ系セラミックや、コージェライト系セラミック、炭化ケイ素系セラミックなどが挙げられる。
また、燃料放散部の燃料滲み出し面からより多くの燃料を放散させるため、燃料放散部に供給した燃料を加圧するように構成しても良い。
さらに、燃料提供部としては、燃料を燃料放散部に提供するポンプが挙げられ、燃料や燃料ガスのポンプへの逆流を防止する逆止弁などを含めることもできる。 Further, examples of the external shape of the fuel dissipation portion include a rod shape, a hemispherical shape, and a shape of a part of the circumferential direction of the cylinder, and the fuel exudation surface of the fuel dissipation portion is a shape forming all or a part of the fuel emission portion. Can be mentioned.
Examples of the porous ceramic forming the porous ceramic body include an alumina-based ceramic, a cordierite-based ceramic, and a silicon carbide-based ceramic.
Further, in order to dissipate more fuel from the fuel exuding surface of the fuel dissipating portion, the fuel supplied to the fuel dissipating portion may be pressurized.
Further, the fuel supply unit includes a pump that supplies fuel to the fuel dissipation unit, and may include a check valve that prevents backflow of fuel or fuel gas to the pump.

なお、燃料放散部の収容部の形態としては、例えば、有底筒状の多孔質セラミック体のみを収容部とする形態や、金属筒とこの金属筒の一端を閉塞して底部をなす多孔質セラミック体とからなる収容部の形態などが挙げられる。 As the form of the accommodating portion of the fuel dissipating portion, for example, a form in which only a bottomed tubular porous ceramic body is used as the accommodating portion, or a metal cylinder and one end of the metal cylinder are closed to form a bottom portion. Examples thereof include the form of a housing portion made of a ceramic body.

さらに、上述のいずれかに記載の燃料供給装置であって、前記多孔質セラミック体は、多孔質アルミナセラミックからなる燃料供給装置とすると良い。 Further, in the fuel supply device according to any one of the above, the porous ceramic body may be a fuel supply device made of a porous alumina ceramic.

燃料供給装置の燃料放散部は、高温(例えば１５０～６００℃）の排気ガスに曝されるが、この燃料供給装置では、燃料放散部に、多孔質アルミナセラミックからなる多孔質セラミック体を用いているので、耐熱性良好な燃料放散部を有する燃料供給装置とすることができる。 The fuel dissipating part of the fuel supply device is exposed to high temperature (for example, 150 to 600 ° C.) exhaust gas. In this fuel supply device, a porous ceramic body made of a porous alumina ceramic is used for the fuel dissipating part. Therefore, the fuel supply device can be provided with a fuel dissipation portion having good heat resistance.

あるいは、内燃機関の排気管に設置された酸化触媒及び微粒子除去フィルタに向けて、上記排気管の上流側から燃料を供給して、上記微粒子除去フィルタの再生処理を行う微粒子除去フィルタの再生システムであって、前述のいずれか１項に記載の燃料供給装置、及び、上記微粒子除去フィルタの上記再生処理を開始する指示に基づき、前記燃料提供部に、前記燃料放散部に向けて前記燃料を提供させる提供指示手段を備える微粒子除去フィルタの再生システムとすると良い。 Alternatively, in a fine particle removal filter regeneration system in which fuel is supplied from the upstream side of the exhaust pipe toward the oxidation catalyst and the fine particle removal filter installed in the exhaust pipe of the internal combustion engine to regenerate the fine particle removal filter. Therefore, based on the fuel supply device according to any one of the above and the instruction to start the regeneration process of the fine particle removing filter, the fuel is provided to the fuel supply unit toward the fuel dissipation unit. It is preferable to use a regeneration system for a fine particle removing filter provided with an instruction means for providing the particles.

この微粒子除去フィルタの再生システムでは、微粒子除去フィルタの再生にあたり、前述の簡単な構造の燃料供給装置を用い、再生処理の指示を受けた提供指示手段が、燃料提供部に燃料放散部に向けて燃料を提供させるので、システム全体としても簡単な構造とすることができる。 In this fine particle removal filter regeneration system, when the fine particle removal filter is regenerated, the fuel supply device having the above-mentioned simple structure is used, and the supply instruction means receiving the instruction of the regeneration process is directed to the fuel supply unit toward the fuel dissipation unit. Since fuel is provided, the system as a whole can have a simple structure.

実施形態に係り、燃料供給装置を用いてＤＯＣおよびＤＰＦに燃料を供給して、ＤＰＦの再生を行う再生システムを示す断面説明図である。FIG. 3 is a cross-sectional explanatory view showing a regeneration system for regenerating a DPF by supplying fuel to a DOC and a DPF using a fuel supply device according to an embodiment. 実施形態に係り、排気管に取り付けた燃料供給装置の燃料放散部から燃料の蒸気を放散する様子を示す説明図である。It is explanatory drawing which shows the state which the vapor of fuel is dissipated from the fuel dissipating part of the fuel supply device attached to the exhaust pipe, which concerns on embodiment. 変形形態１に係り、排気管に取り付けた燃料供給装置の燃料放散部の形態を示す説明図である。It is explanatory drawing which shows the form of the fuel emission part of the fuel supply device attached to the exhaust pipe, which is related to the modification form 1. 変形形態２に係り、排気管に取り付けた燃料供給装置の燃料放散部の形態を示す説明図である。It is explanatory drawing which shows the form of the fuel emission part of the fuel supply device attached to the exhaust pipe, which is related to the modification form 2. 変形形態３に係り、排気管に取り付けた燃料供給装置の燃料放散部の形態を示す説明図である。It is explanatory drawing which shows the form of the fuel emission part of the fuel supply device attached to the exhaust pipe, which is related to the modification form 3. 変形形態４に係り、排気管に取り付けた燃料供給装置の燃料放散部の形態を示す説明図である。It is explanatory drawing which shows the form of the fuel emission part of the fuel supply device attached to the exhaust pipe, which is related to the modification form 4.

(実施形態）
本実施形態に係る燃料供給装置１１及びこれを用いたＤＰＦ再生システム１００について、図１，図２を参照して説明する。
車両(図示せず)に搭載されたディーゼルエンジン(内燃機関、以下単にエンジンとも言う)ＥＮＧは、エンジン制御ユニットＥＣＵによって制御されている。また、エンジンＥＮＧの排気管ＥＸＰの途中には、ＮＯｘ及びＰＭ(微粒子)を取り除くべく、酸化触媒ＤＯＣ、及び、この酸化触媒ＤＯＣの下流側ＥＸＤに取り付けられたフィルタ(微粒子除去フィルタ)ＤＰＦを備えている。また、排気管ＥＸＰのうち、酸化触媒ＤＯＣとフィルタＤＰＦとの間、及びフィルタＤＰＦの下流側ＥＸＤにはそれぞれ排気温センサＳＴ１，ＳＴ２が装着されており、各位置での排気ガスＥＧの排気温データが、エンジン制御ユニットＥＣＵに入力されている。 (Embodiment)
The fuel supply device 11 and the DPF regeneration system 100 using the fuel supply device 11 according to the present embodiment will be described with reference to FIGS. 1 and 2.
The diesel engine (internal combustion engine, hereinafter also simply referred to as an engine) ENG mounted on a vehicle (not shown) is controlled by an engine control unit ECU. Further, in the middle of the exhaust pipe EXP of the engine ENG, an oxidation catalyst DOC and a filter (particulate particle removal filter) DPF attached to the EXD on the downstream side of the oxidation catalyst DOC are provided in order to remove NOx and PM (particulate particles). ing. Further, in the exhaust pipe EXP, exhaust temperature sensors ST1 and ST2 are mounted between the oxidation catalyst DOC and the filter DPF and on the downstream side EXD of the filter DPF, respectively, and the exhaust temperature of the exhaust gas EG at each position. The data is input to the engine control unit ECU.

さらに、本実施形態では、フィルタＤＰＦの再生処理のために、排気管ＥＸＰのうち、酸化触媒ＤＯＣの上流側ＥＸＵに、燃料供給装置１１の燃料放散部１７が装着されている。この燃料供給装置１１は、フィルタＤＰＦの再生処理時に、タンクＴＮＫに貯留された燃料(軽油)ＦＬを、酸化触媒ＤＯＣに排気管ＥＸＰの上流側ＥＸＵから供給する装置である。燃料供給装置１１は、具体的には、燃料ＦＬを排気管ＥＸＰ内に放散する燃料放散部１７及び、燃料放散部１７に燃料を提供する燃料提供部１６からなる。
このうち、燃料提供部１６は、第１燃料パイプ１３、第２燃料パイプ１４を通じて、タンクＴＮＫ内の燃料ＦＬを燃料ポンプ１２により燃料放散部１７に提供する。また、第２燃料パイプ１４の途中には、燃料ＦＬの逆流を防止する逆止弁１５を備えている。 Further, in the present embodiment, the fuel dissipation portion 17 of the fuel supply device 11 is mounted on the EXU on the upstream side of the oxidation catalyst DOC in the exhaust pipe EXP for the regeneration process of the filter DPF. The fuel supply device 11 is a device that supplies the fuel (light oil) FL stored in the tank TNK to the oxidation catalyst DOC from the upstream side EXU of the exhaust pipe EXP during the regeneration process of the filter DPF. Specifically, the fuel supply device 11 includes a fuel distribution unit 17 that dissipates the fuel FL into the exhaust pipe EXP, and a fuel supply unit 16 that supplies fuel to the fuel distribution unit 17.
Of these, the fuel supply unit 16 provides the fuel FL in the tank TNK to the fuel distribution unit 17 by the fuel pump 12 through the first fuel pipe 13 and the second fuel pipe 14. Further, a check valve 15 for preventing the backflow of the fuel FL is provided in the middle of the second fuel pipe 14.

本実施形態では、燃料供給装置１１及びコントローラ１０が、ＤＰＦ再生システム１００を構成しており、燃料供給装置１１は、コントローラ１０により制御される。具体的には、エンジン制御ユニットＥＣＵがフィルタＤＰＦの再生処理の要否を監視しており、フィルタＤＰＦの再生処理が可能となったタイミングで、エンジン制御ユニットＥＣＵからコントローラ１０に向けて再生処理開始の信号が入力される。すると、コントローラ１０は、エンジン制御ユニットＥＣＵからのフィルタＤＰＦの再生処理の指示に基づき、燃料ポンプ１２の駆動を制御する。具体的には、フィルタＤＰＦの再生処理に適切な量の燃料ＦＬを燃料放散部１７に提供するべく、必要な期間（例えば５秒間）に亘り燃料ポンプ１２を駆動し、第２燃料パイプ１４を通じて燃料ＦＬを燃料放散部１７に提供する。 In the present embodiment, the fuel supply device 11 and the controller 10 constitute the DPF regeneration system 100, and the fuel supply device 11 is controlled by the controller 10. Specifically, the engine control unit ECU monitors whether or not the filter DPF regeneration process is necessary, and when the filter DPF regeneration process becomes possible, the engine control unit ECU starts the regeneration process toward the controller 10. Signal is input. Then, the controller 10 controls the drive of the fuel pump 12 based on the instruction of the regeneration process of the filter DPF from the engine control unit ECU. Specifically, the fuel pump 12 is driven for a required period (for example, 5 seconds) in order to provide the fuel dissipation unit 17 with an appropriate amount of fuel FL for the regeneration process of the filter DPF, and the fuel pump 12 is driven through the second fuel pipe 14. The fuel FL is provided to the fuel dissipation unit 17.

次いで、燃料放散部１７の詳細について説明する。燃料放散部１７は、放散部材１９と、この放散部材１９を保持する保持部材１８とからなる。放散部材１９は、その全体が、アルミナ系の多孔質セラミックからなる多孔質セラミック体で構成されている。この放散部材１９は、本実施形態では、先端が半球殻状とされて閉じられた先端有底の円筒状で、基端部分がフランジ状とされた形態を有する。一方、保持部材１８は、金属製で、放散部材１９の基端部分を保持している。
なお、本実施形態の燃料放散部１７では、排気管ＥＸＰ内に露出しているのは、放散部材１９のみであり、保持部材１８は排気管ＥＸＰ内に露出していない。 Next, the details of the fuel dissipation unit 17 will be described. The fuel dissipating portion 17 includes a dissipating member 19 and a holding member 18 that holds the dissipating member 19. The entire scattering member 19 is made of a porous ceramic body made of an alumina-based porous ceramic. In the present embodiment, the dissipating member 19 has a cylindrical shape with a bottomed tip that is closed with a hemispherical shell shape at the tip, and a flange shape at the base end portion. On the other hand, the holding member 18 is made of metal and holds the base end portion of the dissipating member 19.
In the fuel dissipating section 17 of the present embodiment, only the dissipating member 19 is exposed in the exhaust pipe EXP, and the holding member 18 is not exposed in the exhaust pipe EXP.

フィルタＤＰＦの再生処理の際には、第２燃料パイプ１４を通じて提供された燃料ＦＬが、燃料放散部１７の収容部１７Ｃに一時的に収容される。収容部１７Ｃは、保持部材１８の円筒状の保持部材収容部１８Ｃ、及び放散部材１９の有底円筒状の放散部材収容部１９Ｃとからなり、収容部１７Ｃの内壁面１７ＣＮは、保持部材収容部１８Ｃの内壁面１８ＣＮ、及び、放散部材収容部１９Ｃの内壁面１９ＣＮからなる。 During the regeneration process of the filter DPF, the fuel FL provided through the second fuel pipe 14 is temporarily accommodated in the accommodating portion 17C of the fuel dissipating portion 17. The accommodating portion 17C includes a cylindrical holding member accommodating portion 18C of the holding member 18, and a bottomed cylindrical dissipating member accommodating portion 19C of the dissipating member 19, and the inner wall surface 17CN of the accommodating portion 17C is a holding member accommodating portion. It is composed of an inner wall surface 18CN of 18C and an inner wall surface 19CN of a radiation member accommodating portion 19C.

本実施形態では図２に示すように、燃料ＦＬは、燃料ポンプ１２により、放散部材１９の放散部材収容部１９Ｃの一部に溜まる量だけ提供される。このため、収容部１７Ｃの内壁面１７ＣＮのうち、放散部材収容部１９Ｃの内壁面１９ＣＮの下方の一部である接触内壁面１９ＣＮＳのみが燃料ＦＬに接して、接触内壁面１７ＣＮＳをなしている。 In the present embodiment, as shown in FIG. 2, the fuel FL is provided by the fuel pump 12 in an amount accumulated in a part of the dissipating member accommodating portion 19C of the dissipating member 19. Therefore, of the inner wall surface 17CN of the accommodating portion 17C, only the contact inner wall surface 19CNS, which is a part below the inner wall surface 19CN of the dissipating member accommodating portion 19C, is in contact with the fuel FL to form the contact inner wall surface 17CNS.

収容部１７Ｃ(放散部材収容部１９Ｃ)に提供された燃料ＦＬは、接触内壁面１７ＣＮＳのうち接触内壁面１９ＣＮＳから、放散部材１９(多孔質セラミック体)をなす多孔質セラミックの三次元網目状の隙間を通じて、放散部材１９の表面をなす燃料滲み出し面１９ＳＳに滲み出す。すると、排気管ＥＸＰ内を流通する排気ガスＥＧに暖められて気化し、燃料ＦＬの蒸気ＦＬＧとなって、排気ガスＥＧの流れに乗って排気管ＥＸＰ内に放散される。これにより、既に説明した排気管内噴射と同様に、排気ガスＥＧ中に未燃の燃料ＦＬ（蒸気ＦＬＧ）が添加され、この燃料ＦＬを酸化触媒ＤＯＣで酸化燃焼させて排気ガスＥＧの温度を昇温させ、フィルタＤＰＦに堆積したＰＭを強制的に燃焼除去して、フィルタＤＰＦの再生を行うことができる。 The fuel FL provided to the accommodating portion 17C (dissipating member accommodating portion 19C) is a three-dimensional network of porous ceramics forming the dissipating member 19 (porous ceramic body) from the contact inner wall surface 19CNS of the contact inner wall surface 17CNS. Through the gap, it exudes to the fuel exuding surface 19SS forming the surface of the dissipating member 19. Then, it is warmed by the exhaust gas EG circulating in the exhaust pipe EXP and vaporized to become the vapor FLG of the fuel FL, which is dissipated into the exhaust pipe EXP along with the flow of the exhaust gas EG. As a result, the unburned fuel FL (steam FLG) is added to the exhaust gas EG, and the fuel FL is oxidatively combusted by the oxidation catalyst DOC to raise the temperature of the exhaust gas EG, as in the case of the injection in the exhaust pipe described above. The filter DPF can be regenerated by heating and forcibly burning and removing the PM deposited on the filter DPF.

なお、本実施形態の燃料供給装置１１では、燃料放散部１７の燃料滲み出し面１９ＳＳから、燃料ＦＬの蒸気ＦＬＧが放散され、酸化触媒ＤＯＣ及びフィルタＤＰＦに向けて供給される。このため、燃料ＦＬの液滴を噴射する従来の排気管噴射とは異なり、排気管ＥＸＰの内壁ＥＸＰＮに噴射された燃料ＦＬが付着して、フィルタＤＰＦの再生に寄与しない燃料ＦＬが無駄になることが防止される。かくして、燃料ＦＬを排気ガスＥＧ中に適切に分散して、酸化触媒ＤＯＣ及びフィルタＤＰＦなどに向けて供給できる。このため、酸化触媒ＤＯＣにおいて燃料ＦＬの一部を酸化できず、白煙を生じるなどの不具合も生じ難い。 In the fuel supply device 11 of the present embodiment, the vapor FLG of the fuel FL is dissipated from the fuel exudation surface 19SS of the fuel dissipating unit 17, and is supplied toward the oxidation catalyst DOC and the filter DPF. Therefore, unlike the conventional exhaust pipe injection that injects droplets of the fuel FL, the injected fuel FL adheres to the inner wall EXPN of the exhaust pipe EXP, and the fuel FL that does not contribute to the regeneration of the filter DPF is wasted. Is prevented. Thus, the fuel FL can be appropriately dispersed in the exhaust gas EG and supplied toward the oxidation catalyst DOC, the filter DPF and the like. Therefore, a part of the fuel FL cannot be oxidized in the oxidation catalyst DOC, and problems such as white smoke are unlikely to occur.

しかもこの燃料供給装置１１では、燃料放散部１７に燃料ＦＬを一時的に収容する収容部１７Ｃ（１８Ｃ，１９Ｃ）を有しており、この収容部１７Ｃ（放散部材収容部１９Ｃ）の接触内壁面１７ＣＮＳの少なくとも一部（本実施形態では全部）が、放散部材１９の接触内壁面１９ＣＮＳで構成されているので、収容部１７Ｃに提供された燃料ＦＬを、放散部材１９を通じて、速やかに燃料滲み出し面１９ＳＳから滲み出させることができる。 Moreover, the fuel supply device 11 has a housing unit 17C (18C, 19C) for temporarily accommodating the fuel FL in the fuel dissipating unit 17, and the contact inner wall surface of the accommodating unit 17C (dissipating member accommodating unit 19C). Since at least a part (all in the present embodiment) of the 17CNS is composed of the contact inner wall surface 19CNS of the dissipating member 19, the fuel FL provided to the accommodating portion 17C is rapidly exuded through the dissipating member 19. It can be exuded from the surface 19SS.

さらに、本実施形態の燃料供給装置１１の燃料放散部１７は、高温(例えば１５０～６００℃）の排気ガスＥＧに曝される。しかし、この燃料供給装置１１では、燃料放散部１７に、多孔質アルミナセラミックからなる放散部材１９を用いているので、耐熱性良好な燃料放散部１７を有する燃料供給装置１１とすることができる。 Further, the fuel dissipation portion 17 of the fuel supply device 11 of the present embodiment is exposed to a high temperature (for example, 150 to 600 ° C.) exhaust gas EG. However, in this fuel supply device 11, since the release member 19 made of porous alumina ceramic is used for the fuel release section 17, the fuel supply device 11 having the fuel release section 17 having good heat resistance can be obtained.

エンジンＥＮＧの排気管ＥＸＰに設置された酸化触媒ＤＯＣ及びフィルタＤＰＦに向けて、排気管ＥＸＰの上流側ＥＸＵから燃料ＦＬを供給して、フィルタＤＰＦの再生処理を行う、本実施形態のＤＰＦ再生システム１００では、フィルタＤＰＦの再生にあたり、上述の簡単な構造の燃料供給装置１１を用い、再生処理の指示を受けたコントローラ１０が、燃料提供部１６(具体的には燃料ポンプ１２)に、燃料放散部１７に向けて燃料ＦＬを提供させる。このため、システム全体としても簡単な構造とすることができる。 The DPF regeneration system of the present embodiment supplies fuel FL from the EXU on the upstream side of the exhaust pipe EXP toward the oxidation catalyst DOC and the filter DPF installed in the exhaust pipe EXP of the engine ENG to regenerate the filter DPF. In 100, when the filter DPF is regenerated, the fuel supply device 11 having the above-mentioned simple structure is used, and the controller 10 instructed to regenerate the filter dissipates fuel to the fuel supply unit 16 (specifically, the fuel pump 12). The fuel FL is provided to the unit 17. Therefore, the system as a whole can have a simple structure.

(変形形態１）
次いで、上述の実施形態の第１の変形形態にかかる燃料供給装置２１ついて、図３を参照して説明する。但し、本変形形態１の燃料供給装置２１のうち、燃料提供部１６(燃料ポンプ１２、第１燃料パイプ１３、第２燃料パイプ１４、逆止弁１５)については、実施形態と同じであるので、説明を省略し、燃料放散部２７についてのみ詳細に説明する。 (Deformation form 1)
Next, the fuel supply device 21 according to the first modification of the above-described embodiment will be described with reference to FIG. However, among the fuel supply devices 21 of the present modification 1, the fuel supply unit 16 (fuel pump 12, first fuel pipe 13, second fuel pipe 14, check valve 15) is the same as that of the embodiment. , The description is omitted, and only the fuel dissipation portion 27 will be described in detail.

燃料放散部２７は、放散部材２９と、この放散部材２９を保持する保持部材２８とからなる。放散部材２９も、実施形態の放散部材１９と同じく、アルミナ系の多孔質セラミックからなり、先端が半球殻状とされて閉じられた先端有底の円筒状で、基端部分がフランジ状とされた形態を有する多孔質セラミック体である。保持部材２８も、金属製で、放散部材２９の基端部分を保持している。
但し、実施形態の燃料放散部１７では、放散部材１９のみ排気管ＥＸＰ内に露出していたが、本変形形態１では、放散部材２９のほか、保持部材２８の先端側の一部も排気管ＥＸＰ内に露出している。 The fuel dissipating portion 27 includes a dissipating member 29 and a holding member 28 that holds the dissipating member 29. Like the dissipating member 19 of the embodiment, the dissipating member 29 is also made of an alumina-based porous ceramic, has a hemispherical shell-shaped tip and a closed tip-bottomed cylinder, and has a flange-shaped base end portion. It is a porous ceramic body having a different morphology. The holding member 28 is also made of metal and holds the base end portion of the dissipating member 29.
However, in the fuel dissipating portion 17 of the embodiment, only the dissipating member 19 is exposed in the exhaust pipe EXP, but in the present modified embodiment 1, in addition to the dissipating member 29, a part of the tip side of the holding member 28 is also an exhaust pipe. It is exposed in the EXP.

変形形態１の燃料供給装置２１も、フィルタＤＰＦの再生処理の際には、第２燃料パイプ１４を通じて提供された燃料ＦＬが、燃料放散部２７の収容部２７Ｃに一時的に収容される。収容部２７Ｃは、保持部材２８の円筒状の保持部材収容部２８Ｃ、及び放散部材２９の有底円筒状の放散部材収容部２９Ｃとからなり、収容部２７Ｃの内壁面２７ＣＮは、保持部材収容部２８Ｃの内壁面２８ＣＮ、及び、放散部材収容部２９Ｃの内壁面２９ＣＮからなる。 In the fuel supply device 21 of the modified form 1, the fuel FL provided through the second fuel pipe 14 is temporarily accommodated in the accommodating portion 27C of the fuel dissipating portion 27 during the regeneration process of the filter DPF. The accommodating portion 27C includes a cylindrical holding member accommodating portion 28C of the holding member 28 and a bottomed cylindrical dissipating member accommodating portion 29C of the dissipating member 29, and the inner wall surface 27CN of the accommodating portion 27C is a holding member accommodating portion. It is composed of an inner wall surface 28CN of 28C and an inner wall surface 29CN of a radiation member accommodating portion 29C.

本変形形態１の燃料供給装置２１では、燃料ＦＬは、放散部材２９の放散部材収容部２９Ｃのみならず、保持部材２８の保持部材収容部２８Ｃの先端側(図中下方)の一部にまで達する量だけ提供される。このため、収容部２７Ｃの内壁面２７ＣＮのうち、放散部材収容部２９Ｃの内壁面２９ＣＮ全体が、燃料ＦＬに接する接触内壁面２９ＣＮＳとなるほか、保持部材収容部２８Ｃの内壁面２８ＣＮの先端側の一部も燃料ＦＬに接する接触内壁面２８ＣＮＳとなって、接触内壁面２７ＣＮＳをなしている。 In the fuel supply device 21 of the present modification 1, the fuel FL extends not only to the dissipating member accommodating portion 29C of the dissipating member 29 but also to a part of the tip end side (lower part in the figure) of the holding member accommodating portion 28C of the holding member 28. Only the amount that can be reached is provided. Therefore, of the inner wall surface 27CN of the accommodating portion 27C, the entire inner wall surface 29CN of the dissipating member accommodating portion 29C becomes the contact inner wall surface 29CNS in contact with the fuel FL, and the tip end side of the inner wall surface 28CN of the holding member accommodating portion 28C. A part of the contact inner wall surface is 28 CNS in contact with the fuel FL, and the contact inner wall surface is 27 CNS.

燃料放散部２７の収容部２７Ｃに提供された燃料ＦＬは、接触内壁面２７ＣＮＳのうち、放散部材収容部２９Ｃの接触内壁面２９ＣＮＳから、多孔質セラミックからなる放散部材２９内を浸透して、放散部材２９の表面をなす燃料滲み出し面２９ＳＳに滲み出す。これにより、実施形態と同じく、排気ガスＥＧに暖められて燃料ＦＬが、蒸気ＦＬＧとなって、排気ガスＥＧの流れに乗って排気管ＥＸＰ内に放散される。これにより、フィルタＤＰＦに堆積したＰＭを強制的に燃焼除去して、フィルタＤＰＦの再生を行うことができる。 The fuel FL provided to the accommodating portion 27C of the fuel dissipating portion 27 permeates the inside of the dissipating member 29 made of porous ceramic from the contact inner wall surface 29CNS of the dissipating member accommodating portion 29C among the contact inner wall surface 27CNS and dissipates. It exudes to the fuel exuding surface 29SS forming the surface of the member 29. As a result, as in the embodiment, the fuel FL is warmed by the exhaust gas EG to become steam FLG, and is dissipated into the exhaust pipe EXP along with the flow of the exhaust gas EG. As a result, the PM deposited on the filter DPF can be forcibly burned off and the filter DPF can be regenerated.

かくして、実施形態の燃料供給装置１１と同様、変形形態１の燃料供給装置２１でも、燃料ＦＬを排気ガスＥＧ中に適切に分散して、酸化触媒ＤＯＣ及びフィルタＤＰＦなどに向けて供給できる。 Thus, similarly to the fuel supply device 11 of the embodiment, the fuel supply device 21 of the modified form 1 can appropriately disperse the fuel FL in the exhaust gas EG and supply the fuel FL toward the oxidation catalyst DOC, the filter DPF, and the like.

また、収容部２７Ｃの接触内壁面２７ＣＮＳの先端側(図中下方)の一部が、放散部材２９の接触内壁面２９ＣＮＳで構成されているので、収容部２７Ｃに提供された燃料ＦＬを、放散部材２９を通じて、速やかに燃料滲み出し面２９ＳＳから滲み出させることができる。
しかも、多孔質アルミナセラミックからなる放散部材２９を用いているので、耐熱性良好な燃料放散部２７を有する燃料供給装置２１とすることができる。 Further, since a part of the contact inner wall surface 27CNS of the accommodating portion 27C on the tip end side (lower part in the figure) is composed of the contact inner wall surface 29CNS of the dissipating member 29, the fuel FL provided to the accommodating portion 27C is dissipated. Through the member 29, the fuel can be quickly exuded from the fuel exuding surface 29SS.
Moreover, since the dissipating member 29 made of porous alumina ceramic is used, the fuel supply device 21 having the fuel dissipating portion 27 having good heat resistance can be obtained.

（変形形態２）
次いで、第２の変形形態にかかる燃料供給装置３１ついて、図４を参照して説明する。本変形形態２の燃料供給装置３１も、燃料提供部１６については、実施形態と同じであるので説明を省略し、燃料放散部３７についてのみ詳細に説明する。 (Deformation form 2)
Next, the fuel supply device 31 according to the second modification will be described with reference to FIG. Since the fuel supply unit 16 of the modified embodiment 2 is the same as that of the embodiment, the description thereof will be omitted, and only the fuel emission unit 37 will be described in detail.

燃料放散部３７は、放散部材３９と、この放散部材３９を保持する保持部材３８とからなる。放散部材３９も、実施形態等の放散部材１９，２９と同じく、アルミナ系の多孔質セラミックからなるが、先端部分が中実の半球殻状とされ、基端部分がフランジ状とされた形態を有する。保持部材３８も、金属製で、放散部材３９の基端部分を保持している。
また、変形形態１と同じく、放散部材３９のほか、保持部材３８の先端側の一部も排気管ＥＸＰ内に露出している。 The fuel dissipating portion 37 includes a dissipating member 39 and a holding member 38 that holds the dissipating member 39. The dissipating member 39 is also made of an alumina-based porous ceramic like the dissipating members 19 and 29 of the embodiment, but has a solid hemispherical shell shape at the tip portion and a flange shape at the base end portion. Have. The holding member 38 is also made of metal and holds the base end portion of the diverging member 39.
Further, as in the modified form 1, in addition to the radiating member 39, a part of the holding member 38 on the tip end side is also exposed in the exhaust pipe EXP.

変形形態２の燃料供給装置３１も、フィルタＤＰＦの再生処理の際には、第２燃料パイプ１４を通じて提供された燃料ＦＬが、燃料放散部３７の収容部３７Ｃに一時的に収容される。但し、収容部３７Ｃは、保持部材３８の円筒状の保持部材収容部３８Ｃのほか、放散部材３９のうち中実半球状の放散部材収容部３９Ｃとからなり、収容部３７Ｃの内壁面３７ＣＮは、保持部材収容部３８Ｃの円筒状の内壁面３８ＣＮと、放散部材収容部３９Ｃの平坦で円形の内壁面３９ＣＮとからなる。図４を見れば理解出来るように、放散部材収容部３９Ｃ自体は、燃料ＦＬを収容する凹部を構成していない。 In the fuel supply device 31 of the modified form 2, the fuel FL provided through the second fuel pipe 14 is temporarily accommodated in the accommodating portion 37C of the fuel dissipating portion 37 during the regeneration process of the filter DPF. However, the accommodating portion 37C includes a cylindrical holding member accommodating portion 38C of the holding member 38, and a solid hemispherical dissipating member accommodating portion 39C among the dissipating members 39. It is composed of a cylindrical inner wall surface 38CN of the holding member accommodating portion 38C and a flat and circular inner wall surface 39CN of the dissipating member accommodating portion 39C. As can be understood from FIG. 4, the dissipating member accommodating portion 39C itself does not form a recess for accommodating the fuel FL.

変形形態２の燃料供給装置３１では、燃料ＦＬは、保持部材３８の保持部材収容部３８Ｃの一部に提供される。このため、収容部３７Ｃの内壁面３７ＣＮのうち、放散部材収容部３９Ｃの内壁面３９ＣＮが、燃料ＦＬに接する接触内壁面３９ＣＮＳとなるほか、保持部材収容部３８Ｃの内壁面３８ＣＮの先端側の一部も燃料ＦＬに接する接触内壁面３８ＣＮＳとなって、接触内壁面３７ＣＮＳをなしている。 In the fuel supply device 31 of the second modification, the fuel FL is provided to a part of the holding member accommodating portion 38C of the holding member 38. Therefore, of the inner wall surface 37CN of the accommodating portion 37C, the inner wall surface 39CN of the dissipating member accommodating portion 39C becomes the contact inner wall surface 39CNS in contact with the fuel FL, and one on the tip end side of the inner wall surface 38CN of the holding member accommodating portion 38C. The portion also becomes a contact inner wall surface 38CNS in contact with the fuel FL, and forms a contact inner wall surface 37CNS.

燃料放散部３７の収容部３７Ｃに提供された燃料ＦＬは、接触内壁面３７ＣＮＳのうち、放散部材収容部３９Ｃの接触内壁面３９ＣＮＳから、放散部材３９内を浸透して、放散部材３９の表面をなす燃料滲み出し面３９ＳＳに滲み出す。これにより、実施形態と同じく、排気ガスＥＧに暖められて燃料ＦＬが、蒸気ＦＬＧとなって、排気ガスＥＧの流れに乗って排気管ＥＸＰ内に放散される。これにより、フィルタＤＰＦに堆積したＰＭを強制的に燃焼除去して、フィルタＤＰＦの再生を行うことができる。 The fuel FL provided to the accommodating portion 37C of the fuel dissipating portion 37 penetrates into the dissipating member 39 from the contact inner wall surface 39CNS of the dissipating member accommodating portion 39C among the contact inner wall surface 37CNS, and forms the surface of the dissipating member 39. Eggplant fuel exudes to the surface 39SS. As a result, as in the embodiment, the fuel FL is warmed by the exhaust gas EG to become steam FLG, and is dissipated into the exhaust pipe EXP along with the flow of the exhaust gas EG. As a result, the PM deposited on the filter DPF can be forcibly burned off and the filter DPF can be regenerated.

かくして、実施形態の燃料供給装置１１等と同様、変形形態２の燃料供給装置３１でも、燃料ＦＬを排気ガスＥＧ中に適切に分散して、酸化触媒ＤＯＣ及びフィルタＤＰＦに向けて供給できる。
また、変形形態２の燃料供給装置３１では、中実半球状の放散部材収容部３９Ｃを有しているので、実施形態等の燃料供給装置１１，２１に比して、放散部材３９に、クラックや欠損による致命的な不具合が発生しにくく、耐久性が高い利点が有る。 Thus, similarly to the fuel supply device 11 and the like of the embodiment, the fuel supply device 31 of the modified form 2 can appropriately disperse the fuel FL in the exhaust gas EG and supply the fuel FL toward the oxidation catalyst DOC and the filter DPF.
Further, since the fuel supply device 31 of the modified form 2 has a solid hemispherical emission member accommodating portion 39C, the emission member 39 is cracked as compared with the fuel supply devices 11 and 21 of the embodiment and the like. It is less likely to cause fatal problems due to defects and has the advantage of high durability.

また、収容部３７Ｃの接触内壁面３７ＣＮＳの先端側(図中下方)の一部が、放散部材３９の接触内壁面３９ＣＮＳで構成されているので、収容部３７Ｃに提供された燃料ＦＬを、放散部材３９を通じて、速やかに燃料滲み出し面３９ＳＳから滲み出させることができる。
しかも、多孔質アルミナセラミックからなる放散部材３９を用いているので、耐熱性良好な燃料放散部３７を有する燃料供給装置３１とすることができる。 Further, since a part of the contact inner wall surface 37CNS of the accommodating portion 37C on the tip end side (lower part in the figure) is composed of the contact inner wall surface 39CNS of the dissipating member 39, the fuel FL provided to the accommodating portion 37C is dissipated. Through the member 39, the fuel can be quickly exuded from the fuel exuding surface 39SS.
Moreover, since the dissipating member 39 made of porous alumina ceramic is used, the fuel supply device 31 having a fuel dissipating portion 37 having good heat resistance can be obtained.

(変形形態３）
次いで、第３の変形形態にかかる燃料供給装置４１ついて、図５を参照して説明する。本変形形態３の燃料供給装置４１も、燃料提供部１６については、実施形態と同じであるので説明を省略し、燃料放散部４７についてのみ詳細に説明する。
但し、本変形形態３では、使用する排気管ＥＸＰの形態が異なり、断面三角形状の膨出部ＥＸＰＢを有する。即ち、図５に示すように、変形形態３の燃料供給装置４１の燃料放散部４７の放散部材４９が、排気管ＥＸＰの膨出部ＥＸＰＢ内に収まるように装着される。 (Deformation form 3)
Next, the fuel supply device 41 according to the third modification will be described with reference to FIG. Since the fuel supply unit 16 of the modified embodiment 3 is the same as that of the embodiment, the description thereof will be omitted, and only the fuel emission unit 47 will be described in detail.
However, in the present modified form 3, the form of the exhaust pipe EXP used is different, and the bulging portion EXPB having a triangular cross section is provided. That is, as shown in FIG. 5, the dissipating member 49 of the fuel dissipating portion 47 of the fuel supply device 41 of the modified form 3 is mounted so as to be accommodated in the bulging portion EXPB of the exhaust pipe EXP.

本変形形態３の燃料放散部４７は、実施形態の燃料放散部１７等と同様に、放散部材４９と、この放散部材４９を保持する保持部材４８とからなる。このうち、放散部材４９は、実施形態の放散部材１９と同様である。即ち、アルミナ系の多孔質セラミックからなり、先端が半球殻状とされて閉じられた先端有底の円筒状で、基端部分がフランジ状とされた形態を有する。また、保持部材４８も、金属製で、放散部材４９の基端部分を保持している。
燃料放散部４７のうち、排気管ＥＸＰ内に露出しているのが、放散部材４９のみであり、保持部材４８は排気管ＥＸＰ内に露出していない点も同様である。
但し、本変形形態３の燃料放散部４７は、排気管ＥＸＰの膨出部ＥＸＰＢをなす斜面に取り付けられるので、保持部材４８は、途中部分で「く」字状に屈曲した形態とされている。 The fuel dissipating portion 47 of the present modification 3 is composed of a dissipating member 49 and a holding member 48 for holding the dissipating member 49, similarly to the fuel dissipating portion 17 and the like of the embodiment. Of these, the dissipating member 49 is the same as the dissipating member 19 of the embodiment. That is, it is made of an alumina-based porous ceramic, has a cylindrical shape with a bottomed tip that is closed with a hemispherical shell shape at the tip, and has a flange shape at the base end portion. Further, the holding member 48 is also made of metal and holds the base end portion of the dissipating member 49.
Of the fuel dissipating portions 47, only the dissipating member 49 is exposed in the exhaust pipe EXP, and the holding member 48 is not exposed in the exhaust pipe EXP.
However, since the fuel dissipating portion 47 of the present modification 3 is attached to the slope forming the bulging portion EXPB of the exhaust pipe EXP, the holding member 48 is bent in a dogleg shape in the middle portion. ..

変形形態３の燃料供給装置４１も、フィルタＤＰＦの再生処理の際には、第２燃料パイプ１４を通じて提供された燃料ＦＬが、燃料放散部４７の収容部４７Ｃに一時的に収容される。収容部４７Ｃは、保持部材４８の屈曲円筒状の保持部材収容部４８Ｃ、及び放散部材４９の有底円筒状の放散部材収容部４９Ｃからなり、収容部４７Ｃの内壁面４７ＣＮは、保持部材収容部４８Ｃの内壁面４８ＣＮ、及び、放散部材収容部４９Ｃの内壁面４９ＣＮからなる。 In the fuel supply device 41 of the modified form 3, the fuel FL provided through the second fuel pipe 14 is temporarily accommodated in the accommodating portion 47C of the fuel dissipating portion 47 during the regeneration process of the filter DPF. The accommodating portion 47C is composed of a bent cylindrical holding member accommodating portion 48C of the holding member 48 and a bottomed cylindrical dissipating member accommodating portion 49C of the dissipating member 49, and the inner wall surface 47CN of the accommodating portion 47C is a holding member accommodating portion. It is composed of an inner wall surface 48CN of 48C and an inner wall surface 49CN of a radiation member accommodating portion 49C.

本変形形態３の燃料供給装置４１では、燃料ＦＬは、放散部材４９の放散部材収容部４９Ｃのみならず、保持部材４８の保持部材収容部４８Ｃの一部にまで達する量だけ提供される。このため、収容部４７Ｃの内壁面４７ＣＮのうち、放散部材収容部４９Ｃの内壁面４９ＣＮ全体が、燃料ＦＬに接する接触内壁面４９ＣＮＳとなるほか、保持部材収容部４８Ｃの内壁面４８ＣＮの先端側の一部も燃料ＦＬに接する接触内壁面４８ＣＮＳとなって、接触内壁面４７ＣＮＳをなしている。 In the fuel supply device 41 of the present modification 3, the fuel FL is provided in an amount that reaches not only the dissipating member accommodating portion 49C of the dissipating member 49 but also a part of the holding member accommodating portion 48C of the holding member 48. Therefore, of the inner wall surface 47CN of the accommodating portion 47C, the entire inner wall surface 49CN of the dissipating member accommodating portion 49C becomes the contact inner wall surface 49CNS in contact with the fuel FL, and the tip end side of the inner wall surface 48CN of the holding member accommodating portion 48C. A part of the contact inner wall surface is 48 CNS in contact with the fuel FL, and the contact inner wall surface is 47 CNS.

燃料放散部４７の収容部４７Ｃに提供された燃料ＦＬは、接触内壁面４７ＣＮＳのうち、放散部材収容部４９Ｃの接触内壁面４９ＣＮＳから、放散部材４９内を浸透して、放散部材収容部４９Ｃの表面をなす燃料滲み出し面４９ＳＳに滲み出す。これにより、実施形態等と同じく、排気ガスＥＧに暖められて燃料ＦＬが、蒸気ＦＬＧとなって、排気ガスＥＧの流れに乗って排気管ＥＸＰ内に放散される。これにより、フィルタＤＰＦに堆積したＰＭを強制的に燃焼除去して、フィルタＤＰＦの再生を行うことができる。 The fuel FL provided to the accommodating portion 47C of the fuel dissipating portion 47 penetrates into the dissipating member 49 from the contact inner wall surface 49CNS of the dissipating member accommodating portion 49C among the contact inner wall surface 47CNS, and the dissipating member accommodating portion 49C. It exudes to the fuel exudation surface 49SS that forms the surface. As a result, as in the embodiment and the like, the fuel FL is warmed by the exhaust gas EG to become a steam FLG, which is then dissipated into the exhaust pipe EXP along with the flow of the exhaust gas EG. As a result, the PM deposited on the filter DPF can be forcibly burned off and the filter DPF can be regenerated.

かくして、実施形態の燃料供給装置１１等と同様、変形形態３の燃料供給装置４１でも、燃料ＦＬを排気ガスＥＧ中に適切に分散して、酸化触媒ＤＯＣ及びフィルタＤＰＦなどに向けて供給できる。
しかも、本変形形態３の燃料供給装置４１では、燃料放散部４７の放散部材４９が、排気管ＥＸＰのうち断面三角形状の膨出部ＥＸＰＢ内に収まるように、装着される。このため、燃料放散部４７の多孔質セラミック体からなる放散部材４９に、ＰＭが付着しにくくなる利点がある。 Thus, similarly to the fuel supply device 11 and the like of the embodiment, the fuel supply device 41 of the modified form 3 can appropriately disperse the fuel FL in the exhaust gas EG and supply the fuel FL toward the oxidation catalyst DOC, the filter DPF, and the like.
Moreover, in the fuel supply device 41 of the present modification 3, the emission member 49 of the fuel emission portion 47 is mounted so as to fit in the bulging portion EXPB having a triangular cross section in the exhaust pipe EXP. Therefore, there is an advantage that PM is less likely to adhere to the dissipating member 49 made of the porous ceramic body of the fuel dissipating portion 47.

また、収容部４７Ｃの接触内壁面４７ＣＮＳの先端側(図中下方)の一部が、放散部材４９の接触内壁面４９ＣＮＳで構成されているので、収容部４７Ｃに提供された燃料ＦＬを、放散部材４９を通じて、速やかに燃料滲み出し面４９ＳＳから滲み出させることができる。
しかも、多孔質アルミナセラミックからなる放散部材４９を用いているので、耐熱性良好な燃料放散部４７を有する燃料供給装置４１とすることができる。 Further, since a part of the contact inner wall surface 47CNS of the accommodating portion 47C on the tip end side (lower part in the figure) is composed of the contact inner wall surface 49CNS of the dissipating member 49, the fuel FL provided to the accommodating portion 47C is dissipated. Through the member 49, the fuel can be quickly exuded from the fuel exuding surface 49SS.
Moreover, since the dissipating member 49 made of porous alumina ceramic is used, the fuel supply device 41 having the fuel dissipating portion 47 having good heat resistance can be obtained.

(変形形態４）
次いで、第４の変形形態にかかる燃料供給装置５１ついて、図６を参照して説明する。本変形形態４の燃料供給装置５１も、燃料提供部１６については、実施形態と同じであるので説明を省略し、燃料放散部５７についてのみ詳細に説明する。
但し、前述の変形形態３では、排気管ＥＸＰに膨出部ＥＸＰＢを設けたが、本変形形態４では、燃料放散部５７自身に、放散部材５９を排気管外に位置させる凹設部５８Ｂを設けた。 (Deformation form 4)
Next, the fuel supply device 51 according to the fourth modification will be described with reference to FIG. Since the fuel supply unit 16 of the modified embodiment 4 is the same as that of the embodiment, the description thereof will be omitted, and only the fuel emission unit 57 will be described in detail.
However, in the above-mentioned modified form 3, the bulging portion EXPB is provided in the exhaust pipe EXP, but in the present modified form 4, the fuel dissipating portion 57 itself is provided with a recessed portion 58B for locating the dissipating member 59 outside the exhaust pipe. Provided.

本変形形態４の燃料放散部５７は、実施形態の燃料放散部１７などと同様に、放散部材５９と、この放散部材５９を保持する保持部材５８とからなる。このうち、放散部材５９は、実施形態の放散部材１９と同様である。即ち、アルミナ系の多孔質セラミックからなり、先端が半球殻状とされて閉じられた先端有底の円筒状で、基端部分がフランジ状とされた形態を有する。
また、保持部材５８も、実施形態等と同様、金属製で、放散部材５９の基端部分を保持している。但し、保持部材５８は、放散部材５９よりも先端側(図中下方)に延び、放散部材５９を内部に囲む、上方が閉じた円筒状の凹設部５８Ｂを有しており、この凹設部５８Ｂの先端部分で排気管ＥＸＰに結合している。 The fuel dissipating portion 57 of the present modification 4 includes a dissipating member 59 and a holding member 58 that holds the dissipating member 59, similarly to the fuel dissipating portion 17 of the embodiment. Of these, the dissipating member 59 is the same as the dissipating member 19 of the embodiment. That is, it is made of an alumina-based porous ceramic, has a cylindrical shape with a bottomed tip that is closed with a hemispherical shell shape at the tip, and has a flange shape at the base end portion.
Further, the holding member 58 is also made of metal as in the embodiment and the like, and holds the base end portion of the dissipating member 59. However, the holding member 58 has a cylindrical recessed portion 58B that extends toward the tip end side (lower in the figure) of the diverging member 59 and surrounds the diverging member 59 inside, and the upper part is closed. It is connected to the exhaust pipe EXP at the tip portion of the portion 58B.

変形形態４の燃料供給装置５１も、フィルタＤＰＦの再生処理の際には、第２燃料パイプ１４を通じて提供された燃料ＦＬが、燃料放散部５７の収容部５７Ｃに一時的に収容される。収容部５７Ｃは、保持部材５８の円筒状の保持部材収容部５８Ｃ、及び放散部材５９の有底円筒状の放散部材収容部５９Ｃとからなり、収容部５７Ｃの内壁面５７ＣＮは、保持部材収容部５８Ｃの内壁面５８ＣＮ、及び、放散部材収容部５９Ｃの内壁面５９ＣＮからなる。 In the fuel supply device 51 of the modified form 4, the fuel FL provided through the second fuel pipe 14 is temporarily accommodated in the accommodating portion 57C of the fuel dissipating portion 57 during the regeneration process of the filter DPF. The accommodating portion 57C includes a cylindrical holding member accommodating portion 58C of the holding member 58 and a bottomed cylindrical dissipating member accommodating portion 59C of the dissipating member 59, and the inner wall surface 57CN of the accommodating portion 57C is a holding member accommodating portion. It is composed of an inner wall surface 58CN of the 58C and an inner wall surface 59CN of the dissipating member accommodating portion 59C.

本変形形態４の燃料供給装置５１では、燃料ＦＬは、放散部材５９の放散部材収容部５９Ｃのみならず、保持部材５８の保持部材収容部５８Ｃの一部にまで達する量だけ提供される。このため、収容部５７Ｃの内壁面５７ＣＮのうち、放散部材収容部５９Ｃの内壁面５９ＣＮ全体が、燃料ＦＬに接する接触内壁面５９ＣＮＳとなるほか、保持部材収容部５８Ｃの内壁面５８ＣＮの先端側の一部も燃料ＦＬに接する接触内壁面５８ＣＮＳとなって、接触内壁面５７ＣＮＳをなしている。 In the fuel supply device 51 of the present modification 4, the fuel FL is provided in an amount that reaches not only the dissipating member accommodating portion 59C of the dissipating member 59 but also a part of the holding member accommodating portion 58C of the holding member 58. Therefore, of the inner wall surface 57CN of the accommodating portion 57C, the entire inner wall surface 59CN of the dissipating member accommodating portion 59C becomes the contact inner wall surface 59CNS in contact with the fuel FL, and the tip end side of the inner wall surface 58CN of the holding member accommodating portion 58C. A part of the contact inner wall surface is 58 CNS in contact with the fuel FL, and the contact inner wall surface is 57 CNS.

燃料放散部５７の収容部５７Ｃに提供された燃料ＦＬは、接触内壁面５７ＣＮＳのうち、放散部材収容部５９Ｃの接触内壁面５９ＣＮＳから、放散部材５９内を浸透して、放散部材収容部５９Ｃの表面をなす燃料滲み出し面５９ＳＳに滲み出す。これにより、実施形態と同じく、排気ガスＥＧに暖められて燃料ＦＬが、蒸気ＦＬＧとなって、排気ガスＥＧの流れに乗って排気管ＥＸＰ内に放散される。これにより、フィルタＤＰＦに堆積したＰＭを強制的に燃焼除去して、フィルタＤＰＦの再生を行うことができる。 The fuel FL provided to the accommodating portion 57C of the fuel dissipating portion 57 penetrates into the dissipating member 59 from the contact inner wall surface 59CNS of the dissipating member accommodating portion 59C among the contact inner wall surface 57CNS, and the dissipating member accommodating portion 59C. It exudes to the fuel exudation surface 59SS forming the surface. As a result, as in the embodiment, the fuel FL is warmed by the exhaust gas EG to become steam FLG, and is dissipated into the exhaust pipe EXP along with the flow of the exhaust gas EG. As a result, the PM deposited on the filter DPF can be forcibly burned off and the filter DPF can be regenerated.

かくして、実施形態の燃料供給装置１１等と同様、変形形態４の燃料供給装置５１でも、燃料ＦＬを排気ガスＥＧ中に適切に分散して、酸化触媒ＤＯＣ及びフィルタＤＰＦなどに向けて供給できる。 Thus, similarly to the fuel supply device 11 and the like of the embodiment, the fuel supply device 51 of the modified form 4 can appropriately disperse the fuel FL in the exhaust gas EG and supply the fuel FL toward the oxidation catalyst DOC, the filter DPF, and the like.

しかも、本変形形態４の燃料供給装置５１では、燃料放散部５７のうち放散部材５９が、保持部材５８の凹設部５８Ｂで囲まれている。このため、排気管ＥＸＰに燃料放散部５７を取り付けた状態で、放散部材５９は、凹設部５８Ｂで形成した排気管ＥＸＰの膨出部に位置していることとなり、多孔質セラミック体５９にＰＭが付着しにくくなる利点がある。 Moreover, in the fuel supply device 51 of the present modification 4, the emission member 59 of the fuel dissipation portion 57 is surrounded by the recessed portion 58B of the holding member 58. Therefore, with the fuel dissipation portion 57 attached to the exhaust pipe EXP, the dissipation member 59 is located at the bulging portion of the exhaust pipe EXP formed by the recessed portion 58B, and the porous ceramic body 59 is formed. There is an advantage that PM is less likely to adhere.

また、収容部５７Ｃの接触内壁面５７ＣＮＳの先端側(図中下方)の一部が、放散部材５９の接触内壁面５９ＣＮＳで構成されているので、収容部５７Ｃに提供された燃料ＦＬを、放散部材５９を通じて、速やかに燃料滲み出し面５９ＳＳから滲み出させることができる。
しかも、多孔質アルミナセラミックからなる放散部材５９を用いているので、耐熱性良好な燃料放散部５７を有する燃料供給装置５１とすることができる。 Further, since a part of the contact inner wall surface 57CNS of the accommodating portion 57C on the tip end side (lower part in the figure) is composed of the contact inner wall surface 59CNS of the dissipating member 59, the fuel FL provided to the accommodating portion 57C is dissipated. Through the member 59, the fuel can be quickly exuded from the fuel exuding surface 59SS.
Moreover, since the dissipating member 59 made of porous alumina ceramic is used, the fuel supply device 51 having the fuel dissipating portion 57 having good heat resistance can be obtained.

以上において、本発明を実施形態及び変形形態１～４に即して説明したが、本発明は上記実施形態等に限定されるものではなく、その要旨を逸脱しない範囲で、適宜変更して適用できることはいうまでもない。
例えば、実施形態では、ＤＰＦ再生システム１００として、燃料供給装置１１のほかに、エンジン制御ユニットＥＣＵからの再生処理の指示に基づき、燃料提供部１６に燃料放散部１７に向けて燃料ＦＬを提供させるコントローラ１０を設けた例を示した。
しかし、エンジン制御ユニットＥＣＵ自身が、自身の生成した再生処理の指示に基づき、コントローラの機能をも果たして、燃料提供部１６に燃料放散部１７に向けて燃料ＦＬを提供させるように制御して、燃料供給装置１１とエンジン制御ユニットＥＣＵとで、ＤＰＦ再生システム(微粒子除去フィルタの再生システム)を構成するようにしても良い。 In the above, the present invention has been described in accordance with the embodiments and modifications 1 to 4, but the present invention is not limited to the above embodiments and the like, and is appropriately modified and applied without departing from the gist thereof. Needless to say, you can do it.
For example, in the embodiment, as the DPF regeneration system 100, in addition to the fuel supply device 11, the fuel supply unit 16 is made to provide the fuel FL toward the fuel dissipation unit 17 based on the instruction of the regeneration process from the engine control unit ECU. An example in which the controller 10 is provided is shown.
However, the engine control unit ECU itself also fulfills the function of the controller based on the instruction of the regeneration process generated by itself, and controls the fuel supply unit 16 to supply the fuel FL toward the fuel dissipation unit 17. The fuel supply device 11 and the engine control unit ECU may form a DPF regeneration system (regeneration system for fine particle removal filters).

また、例えば、実施形態及び変形形態１～４の燃料供給装置１１，２１，３１，４１，５１では、いずれも全体が多孔質セラミック体からなる放散部材１９，２９，３９，４９，５９を用いた。しかし、放散部材の一部を多孔質セラミックからなる多孔質セラミック体で構成して、この多孔質セラミック体で燃料滲み出し面を構成するようにしても良い。
また、燃料放散部１７等の燃料滲み出し面１９ＳＳ等から、より多くの燃料ＦＬを放散させるべく、収容部１７Ｃ等に提供された燃料ＦＬを加圧して、燃料滲み出し面１９ＳＳ等への燃料ＦＬの滲み出しを促進させるようにしても良い。 Further, for example, in the fuel supply devices 11, 21, 31, 41, 51 of the embodiments 1 to 4, all of the dissipating members 19, 29, 39, 49, 59 made entirely of a porous ceramic body are used. board. However, a part of the dissipating member may be formed of a porous ceramic body made of a porous ceramic, and the porous ceramic body may be used to form a fuel exudation surface.
Further, in order to dissipate more fuel FL from the fuel exuding surface 19SS or the like of the fuel dissipating portion 17, the fuel FL provided to the accommodating portion 17C or the like is pressurized to fuel the fuel exuding surface 19SS or the like. You may try to promote the exudation of FL.

１００ＤＰＦ再生システム(微粒子除去フィルタの再生システム)
１０コントローラ(提供指示手段)
１１，２１，３１，４１，５１燃料供給装置
１６燃料提供部
１７，２７，３７，４７，５７燃料放散部
１７Ｃ，２７Ｃ，３７Ｃ，４７Ｃ，５７Ｃ収容部
１７ＣＮ，２７ＣＮ，３７ＣＮ，４７ＣＮ，５７ＣＮ (収容部の)内壁面
１７ＣＮＳ，２７ＣＮＳ，３７ＣＮＳ，４７ＣＮＳ，５７ＣＮＳ (内壁面のうち)接触内壁面
１８，２８，３８，４８，５８保持部材
５８Ｂ凹設部
１９，２９，３９，４９，５９放散部材(多孔質セラミック体)
１９ＳＳ，２９ＳＳ，３９ＳＳ，４９ＳＳ，５９ＳＳ燃料滲み出し面
１９Ｃ，２９Ｃ，３９Ｃ，４９Ｃ，５９Ｃ放散部材収容部
１９ＣＮＳ，２９ＣＮＳ，３９ＣＮＳ，４９ＣＮＳ，５９ＣＮＳ (内壁面のうち)接触内壁面
ＥＮＧエンジン(ディーゼルエンジン，内燃機関)
ＥＸＰ排気管
ＥＸＵ (排気管の)上流側
ＥＸＤ (排気管の)下流側
ＥＸＰＢ (排気管の)膨出部
ＥＧ排気ガス
ＤＯＣ酸化触媒
ＤＰＦフィルタ(微粒子除去フィルタ)
ＥＣＵエンジン制御ユニット
ＦＬ燃料
ＦＬＧ燃料蒸気 100 DPF regeneration system (regeneration system for particulate filter)
10 Controller (Providing instruction means)
11,21,31,41,51 Fuel supply device 16 Fuel supply unit 17,27,37,47,57 Fuel dissipation unit 17C, 27C, 37C, 47C, 57C Containment unit 17CN, 27CN, 37CN, 47CN, 57CN (accommodation) Inner wall surface 17CNS, 27CNS, 37CNS, 47CNS, 57CNS (of the inner wall surface) Contact inner wall surface 18, 28, 38, 48, 58 Holding member 58B Recessed part 19, 29, 39, 49, 59 Dissipating member (of the inner wall surface) Porous ceramic body)
19SS, 29SS, 39SS, 49SS, 59SS Fuel exudation surface 19C, 29C, 39C, 49C, 59C Dissipative member housing 19CNS, 29CNS, 39CNS, 49CNS, 59CNS (out of inner wall surface) Contact inner wall surface ENG engine (diesel engine, Internal combustion engine)
EXP Exhaust pipe EXU (exhaust pipe) upstream side EXD (exhaust pipe) downstream side EXPB (exhaust pipe) bulge EG Exhaust gas DOC Oxidation catalyst DPF filter (particulate removal filter)
ECU engine control unit FL fuel FLG fuel vapor

Claims

A fuel supply device that supplies fuel into the exhaust pipe of an internal combustion engine.
A fuel dissipating section that is attached to the exhaust pipe and dissipates the vapor of the fuel into the exhaust pipe.
The fuel distribution unit is provided with a fuel supply unit that supplies the fuel.
The above fuel dissipation part is
It is in contact with the exhaust gas flowing in the exhaust pipe, is composed of a porous ceramic body, and has a fuel exudation surface from which the fuel supplied from the fuel supply unit exudes.
The fuel dissipation part is
It has a storage unit that temporarily stores the fuel provided by the fuel supply unit and stores it on the tip side.
Of the inner wall surface of the accommodating portion, at least a part of the contact inner wall surface to which the fuel is accommodated and stored in the accommodating portion is composed of the porous ceramic body forming the fuel exudation surface.
Fuel supply device.

The fuel supply device according to claim 1 .
The porous ceramic body is a fuel supply device made of porous alumina ceramic.

A particle removal filter regeneration system that regenerates the fine particle removal filter by supplying fuel from the upstream side of the exhaust pipe toward the oxidation catalyst and fine particle removal filter installed in the exhaust pipe of the internal combustion engine. ,
The fuel supply device according to claim 1 or 2 , and
A regeneration system for a fine particle removal filter, which comprises a supply instruction means for causing the fuel supply unit to supply the fuel to the fuel emission unit based on an instruction to start the regeneration process of the fine particle removal filter.