JP2011064136A - Exhaust emission treatment device for diesel engine - Google Patents

Exhaust emission treatment device for diesel engine Download PDF

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JP2011064136A
JP2011064136A JP2009215445A JP2009215445A JP2011064136A JP 2011064136 A JP2011064136 A JP 2011064136A JP 2009215445 A JP2009215445 A JP 2009215445A JP 2009215445 A JP2009215445 A JP 2009215445A JP 2011064136 A JP2011064136 A JP 2011064136A
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case
dpf
side end
doc
inlet side
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JP5161179B2 (en
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Tomoyoshi Sakano
倫祥 坂野
Kiyoshi Hataura
潔 畑浦
Kazumichi Matsuishi
一道 松石
Mutsuhisa Ishihara
睦久 石原
Osamu Yoshii
理 吉井
Akihiko Kai
昭彦 甲斐
Hiroki Oso
洋樹 尾曽
Yuji Takemura
裕二 竹村
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Kubota Corp
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Kubota Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust emission treatment device for a diesel engine which has high exhaust gas sealing performances of a case connection part and in which same components can be used for flanges of the case connection part. <P>SOLUTION: A diameter of a DOC case outlet side end part 6 is reduced from a diameter of a DOC case middle side part 6a adjacent to the DOC case outlet side end part 6. The DOC case outlet side end part 6a is internally fitted in a DPF case inlet side part 7. An outer diameter of the DOC middle side part 6a and an outer diameter of the DPF inlet side part 7 are set same. A DOC case flange 21 and a DPF case flange 30 are attached to outer circumferences of the DOC case middle side part 6a and the DPF case inlet side end part 7 respectively. Consequently, same components are used for the DOC case flange 21 and the DPF case flange 30 which have a same inner diameter. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、ディーゼルエンジンの排気処理装置に関し、詳しくは、ケース連結部の排気ガスの密封性が高く、かつ、ケース連結部のフランジに同じ部品を用いることができる、ディーゼルエンジンの排気処理装置に関する。
この明細書及び特許請求の範囲で、ＤＯＣはディーゼル酸化触媒、ＤＰＦはディーゼル・パティキュレート・フィルタ、ＰＭは排気中の粒子状物質を意味する。 The present invention relates to an exhaust treatment apparatus for a diesel engine, and more particularly, to an exhaust treatment apparatus for a diesel engine, which has high sealing performance for exhaust gas in a case connection part and can use the same parts for the flange of the case connection part. .
In this specification and claims, DOC means a diesel oxidation catalyst, DPF means a diesel particulate filter, and PM means particulate matter in exhaust gas.

従来、ディーゼルエンジンの排気処理装置として、ＤＯＣケースにＤＯＣを収容し、ＤＰＦケースにＤＰＦを収容し、ＤＯＣケース出口側端部とＤＰＦケース入口側端部とをＤＯＣケースフランジとＤＰＦケースフランジとを介して離脱自在に連結したものがある(特許文献１の図１、図２参照)。   Conventionally, as an exhaust treatment device for a diesel engine, DOC is accommodated in a DOC case, DPF is accommodated in a DPF case, a DOC case outlet side end and a DPF case inlet side end are connected to a DOC case flange and a DPF case flange. There is one that is detachably connected via the cable (see FIGS. 1 and 2 of Patent Document 1).

この種の排気処理装置によれば、ＤＰＦでＰＭを捕捉し、ＰＭがある程度堆積すると、燃焼室へのポスト噴射や排気管への燃料噴射等により排気に燃料を混入させ、この燃料をＤＯＣで酸化燃焼させることにより、排気の温度を上昇させ、排気の熱により、ＰＭを焼却除去して、ＤＰＦを再生することができる利点がある。   According to this type of exhaust treatment device, when PM is captured by the DPF and PM accumulates to some extent, fuel is mixed into the exhaust by post injection into the combustion chamber, fuel injection into the exhaust pipe, etc. By oxidizing and burning, there is an advantage that the temperature of the exhaust can be raised and PM can be incinerated and removed by the heat of the exhaust to regenerate the DPF.

この特許文献１の図２のものでは、ＤＯＣケース出口側端部とＤＰＦケース入口側端部とが同一径で突合せ状になっている。
また、特許文献１の図１のものでは、ＤＯＣケース出口側端部の外径とＤＰＦケース入口側端部の外径とが異なり、このＤＯＣケース出口側端部とＤＰＦケース入口側端部の各外周に、ＤＯＣケースフランジとＤＰＦケースフランジとをそれぞれ取り付けている。
このため、この従来技術では、それぞれ問題がある。 In the thing of FIG. 2 of this patent document 1, the end part on the DOC case outlet side and the end part on the DPF case inlet side have the same diameter and are abutted.
Moreover, in the thing of FIG. 1 of patent document 1, the outer diameter of the DOC case exit side end and the outer diameter of the DPF case entrance end are different, and the DOC case exit end and the DPF case entrance end are different. A DOC case flange and a DPF case flange are attached to each outer periphery.
For this reason, each of the conventional techniques has problems.

特開２００４−２６３５９３号公報(図１、図２参照)JP 2004-263593 A (see FIGS. 1 and 2)

《問題》 ケース連結部の排気ガスの密封性が低い。
特許文献１の図２のものでは、ＤＯＣケース出口側端部とＤＰＦケース入口側端部とが同一径で突合せ状になっているため、これらが嵌合しているものに比べ、ケース連結部の排気ガスの密封性が低い。 <Problem> The sealing performance of the exhaust gas at the case connecting portion is low.
In the thing of FIG. 2 of patent document 1, since the DOC case exit side edge part and the DPF case entrance side edge part are butt-shaped with the same diameter, compared with what these have fitted, a case connection part The exhaust gas sealing performance is low.

《問題》 ケース連結部のフランジに同じ部品を用いることができない。
特許文献１の図１のものでは、ＤＯＣケース出口側端部の外径とＤＰＦケース入口側端部の外径とが異なり、このＤＯＣケース出口側端部とＤＰＦケース入口側端部の各外周に、ＤＯＣケースフランジとＤＰＦケースフランジとをそれぞれ取り付けているため、内径が異なるケース連結部のＤＯＣケースフランジとＤＰＦケースフランジとに同じ部品を用いることができない。 <Problem> The same part cannot be used for the flange of the case connecting portion.
In FIG. 1 of Patent Document 1, the outer diameter of the DOC case outlet side end and the outer diameter of the DPF case inlet side end are different, and each outer periphery of the DOC case outlet side end and the DPF case inlet side end. In addition, since the DOC case flange and the DPF case flange are respectively attached, the same parts cannot be used for the DOC case flange and the DPF case flange of the case connecting portions having different inner diameters.

本発明の課題は、ケース連結部の排気ガスの密封性が高く、かつ、ケース連結部のフランジに同じ部品を用いることができる、ディーゼルエンジンの排気処理装置を提供することにある。   An object of the present invention is to provide an exhaust treatment device for a diesel engine that has high sealing performance of exhaust gas at a case connecting portion and that can use the same components for the flange of the case connecting portion.

(請求項１に係る発明の発明特定事項)
図１、図２に例示するように、ＤＯＣケース(２)にＤＯＣ(１)を収容し、ＤＰＦケース(４)にＤＰＦ(３)を収容し、ＤＯＣケース出口側端部(６)とＤＰＦケース入口側端部(７)とをＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とを介して離脱自在に連結した、ディーゼルエンジンの排気処理装置において、
ＤＯＣケース出口側端部(６)を、このＤＯＣケース出口側端部(６)と隣合うＤＯＣケース中間寄り部(６ａ)よりも縮径させ、このＤＯＣケース出口側端部(６ａ)をＤＰＦケース入口側端部(７)に内嵌させ、
ＤＯＣケース中間寄り部(６ａ)の外径とＤＰＦケース入口側端部(７)の外径を同じにし、このＤＯＣケース中間寄り部(６ａ)とＤＰＦケース入口側端部(７)の各外周に、ＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とをそれぞれ取り付けることにより、内径が同じになるＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とに同じ部品を用いた、ことを特徴とするディーゼルエンジンの排気処理装置。 (Invention-specific matters of the invention of claim 1)
As illustrated in FIGS. 1 and 2, the DOC case (2) accommodates the DOC (1), the DPF case (4) accommodates the DPF (3), the DOC case outlet side end (6), and the DPF. In an exhaust treatment device for a diesel engine, wherein a case inlet side end portion (7) is detachably connected via a DOC case flange (21) and a DPF case flange (30).
The diameter of the DOC case outlet side end (6) is made smaller than that of the DOC case middle edge (6a) adjacent to the DOC case outlet side end (6), and the DOC case outlet side end (6a) is connected to the DPF. Fit into the case entrance end (7),
The outer diameter of the DOC case intermediate portion (6a) and the outer diameter of the DPF case inlet side end portion (7) are made the same, and each outer periphery of the DOC case intermediate portion (6a) and the DPF case inlet side end portion (7) In addition, by attaching the DOC case flange (21) and the DPF case flange (30) respectively, the same parts are used for the DOC case flange (21) and the DPF case flange (30) having the same inner diameter. Diesel engine exhaust treatment equipment.

(請求項６に係る発明の発明特定事項)
図３、図４に例示するように、ＤＯＣケース(２)にＤＯＣ(１)を収容し、ＤＰＦケース(４)にＤＰＦ(３)を収容し、ＤＯＣケース出口側端部(６)とＤＰＦケース入口側端部(７)とをＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とを介して離脱自在に連結した、ディーゼルエンジンの排気処理装置において、
ＤＰＦケース入口側端部(７)を、このＤＰＦケース入口側端部(７)と隣合うＤＰＦケース中間寄り部(７ａ)よりも縮径させ、このＤＰＦケース入口側端部(７)をＤＯＣケース出口側端部(６)に内嵌させ、
ＤＰＦケース中間寄り部(７ａ)の外径とＤＯＣケース出口側端部(６)の外径とを同じにし、このＤＰＦケース中間寄り部(７ａ)とＤＯＣケース出口側端部(６)の各外周に、ＤＰＦケースフランジ(３０)とＤＯＣケースフランジ(２１)とをそれぞれ取り付けることにより、内径が同じになるＤＰＦケースフランジ(３０)とＤＯＣケースフランジ(２１)とに同じ部品を用いた、ことを特徴とするディーゼルエンジンの排気処理装置。 (Invention specific matter of invention of claim 6)
As illustrated in FIGS. 3 and 4, the DOC case (2) accommodates the DOC (1), the DPF case (4) accommodates the DPF (3), the DOC case outlet side end (6), and the DPF. In an exhaust treatment device for a diesel engine, wherein a case inlet side end portion (7) is detachably connected via a DOC case flange (21) and a DPF case flange (30).
The DPF case inlet side end portion (7) has a diameter smaller than the DPF case intermediate side portion (7a) adjacent to the DPF case inlet side end portion (7), and the DPF case inlet side end portion (7) is DOC. Fit inside the case exit end (6),
The outer diameter of the DPF case intermediate portion (7a) and the outer diameter of the DOC case outlet side end portion (6) are made the same, and each of the DPF case intermediate portion (7a) and the DOC case outlet side end portion (6) The same parts were used for the DPF case flange (30) and the DOC case flange (21) having the same inner diameter by attaching the DPF case flange (30) and the DOC case flange (21) to the outer periphery. An exhaust treatment device for diesel engines.

(請求項１に係る発明)
請求項１に係る発明は、次の効果を奏する。
《効果》 ケース連結部の排気ガスの密封性が高い。
図１、図２に例示するように、ＤＯＣケース出口側端部(６)を、このＤＯＣケース出口側端部(６)と隣合うＤＯＣケース中間寄り部(６ａ)よりも縮径させ、このＤＯＣケース出口側端部(６ａ)をＤＰＦケース入口側端部(７)に内嵌させるので、ケース連結部の排気ガスの密封性が高い。 (Invention of Claim 1)
The invention according to claim 1 has the following effects.
<Effect> The sealing property of the exhaust gas in the case connecting portion is high.
As illustrated in FIG. 1 and FIG. 2, the DOC case outlet side end portion (6) is made smaller in diameter than the DOC case intermediate side portion (6a) adjacent to the DOC case outlet side end portion (6). Since the DOC case outlet side end portion (6a) is fitted into the DPF case inlet side end portion (7), the exhaust gas sealing property of the case connecting portion is high.

《効果》 ケース連結部のフランジに同じ部品を用いることができる。
図１、図２に例示するように、ＤＯＣケース中間寄り部(６ａ)の外径とＤＰＦケース入口側端部(７)の外径とを同じにし、このＤＯＣケース中間寄り部(６ａ)とＤＰＦケース入口側端部(７)の各外周に、ＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とをそれぞれ取り付けることにより、内径が同じになるケース連結部のＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とに同じ部品を用いることができる。 <Effect> The same parts can be used for the flange of the case connecting portion.
As illustrated in FIGS. 1 and 2, the outer diameter of the DOC case intermediate portion (6a) and the outer diameter of the DPF case inlet side end portion (7) are made the same, and the DOC case intermediate portion (6a) By attaching a DOC case flange (21) and a DPF case flange (30) to each outer periphery of the DPF case inlet side end (7), The same parts can be used for the DPF case flange (30).

(請求項２に係る発明)
請求項２に係る発明は、請求項１に係る発明の効果に加え、次の効果を奏する。
《効果》 ケース嵌合時にＤＯＣ出口側端部が損傷するのを防止することができる。
図１、図２に例示するように、ＤＯＣケース出口側端部(６)にＤＯＣ出口側端部(１２)を収容したので、ＤＯＣ出口側端部(１２)の周壁がＤＯＣケース出口側端部(６)の外側に露出しておらず、ＤＯＣケース出口側端部(６ａ)をＤＰＦケース入口側端部(７)に内嵌させる場合に、ＤＯＣ出口側端部(１２)の周壁がＤＰＦケース入口側端部(７)に接触することがなく、ケース嵌合時にＤＯＣ出口側端部(１２)が損傷するのを防止することができる。 (Invention of Claim 2)
The invention according to claim 2 has the following effect in addition to the effect of the invention according to claim 1.
<< Effect >> It can prevent that a DOC exit side edge part is damaged at the time of case fitting.
As illustrated in FIGS. 1 and 2, since the DOC outlet side end portion (12) is accommodated in the DOC case outlet side end portion (6), the peripheral wall of the DOC outlet side end portion (12) is the DOC case outlet side end portion. When the DOC case outlet side end (6a) is fitted into the DPF case inlet side end (7), the peripheral wall of the DOC outlet side end (12) is not exposed to the outside of the portion (6). It is possible to prevent the DOC outlet side end portion (12) from being damaged when the case is fitted without contacting the DPF case inlet side end portion (7).

(請求項３に係る発明)
請求項３に係る発明は、請求項２に係る発明の効果に加え、次の効果を奏する。
《効果》 ＤＰＦの再生を速やかに行うことができる。
図２(Ａ)に例示するように、ＤＯＣ出口側端部(１２)とＤＯＣケース出口側端部(６)との各端部周壁相互間に隙間(１３)を保持し、この隙間(１３)をＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間の排気ガス受け渡し空間(１４)に連通させ、ＤＯＣ出口側端部(１２)の周壁を上記隙間(１３)に向けて露出させたので、この隙間(１３)に排気ガス受け渡し空間(１４)内の排気が進入し、排気の熱がＤＯＣ出口側端部(１２)の周壁にその内側からだけでなく、外側からも入熱され、或いは排気の熱によりＤＯＣ出口側端部(１２)の周壁からＤＯＣケース出口側端部(６)への放熱も防止され、ＤＯＣ(１)の周壁の温度が高まり、ＤＯＣ(１)の活性化が促進され、ＤＰＦ(３)の再生を速やかに行うことができる。 (Invention of Claim 3)
The invention according to claim 3 has the following effect in addition to the effect of the invention according to claim 2.
<Effect> The DPF can be quickly regenerated.
As illustrated in FIG. 2A, a gap (13) is held between the end peripheral walls of the DOC outlet side end (12) and the DOC case outlet side end (6). ) Communicated with the exhaust gas transfer space (14) between the DOC outlet side end (12) and the DPF inlet side end (10), and the peripheral wall of the DOC outlet side end (12) is connected to the gap (13). The exhaust in the exhaust gas delivery space (14) enters the gap (13), and the heat of the exhaust not only enters the peripheral wall of the DOC outlet side end (12) from the inside, Heat is also input from the outside or the heat of the exhaust prevents heat dissipation from the peripheral wall of the DOC outlet side end (12) to the DOC case outlet side end (6), and the temperature of the peripheral wall of the DOC (1) increases. Activation of DOC (1) is promoted and DPF (3) can be rapidly regenerated.

(請求項４に係る発明)
請求項４に係る発明は、請求項２に係る発明の効果に加え、次の効果を奏する。
《効果》 ＤＰＦの再生を速やかに行うことができる。
図２(Ｂ)に例示するように、ＤＯＣ出口側端部(１２)とＤＯＣケース出口側端部(６)との各端部周壁相互間に断熱性クッション材(１３ａ)を介在させたので、ＤＯＣ出口側端部(１２)の周壁からＤＯＣケース出口側端部(６)への放熱が防止され、ＤＯＣ(１)の活性化が促進され、ＤＰＦ(３)の再生を速やかに行うことができる。 (Invention of Claim 4)
The invention according to claim 4 has the following effect in addition to the effect of the invention according to claim 2.
<Effect> The DPF can be quickly regenerated.
As illustrated in FIG. 2 (B), since the heat insulating cushioning material (13a) is interposed between the end peripheral walls of the DOC outlet side end (12) and the DOC case outlet side end (6). Heat dissipation from the peripheral wall of the DOC outlet side end (12) to the DOC case outlet side end (6) is prevented, the activation of the DOC (1) is promoted, and the DPF (3) is promptly regenerated. Can do.

(請求項５に係る発明)
請求項５に係る発明は、請求項１から請求項４のいずれかに係る発明の効果に加え、次の効果を奏する。
《効果》 排気処理装置の全長を短くすることができる。
図１、図２に例示するように、隣合うＤＰＦケース入口側端部(７)とＤＰＦケース中間寄り部(７ａ)とを同一径で段差無く形成し、ＤＰＦケース中間寄り部(７ａ)の外周にセンサ取り付けボス(２８)を取り付けたので、段差の境界部分での取り付けの制限を受けることなく、ＤＰＦケース中間寄り部(７ａ)の外周にセンサ取り付けボス(２８)を取り付けることができ、センサ(２９)をＤＯＣ出口側端部(１２)に十分に近づけることができるとともに、ＤＰＦ入口側端部(１０)をセンサ(２９)に十分に近づけることができ、排気処理装置の全長を短くすることができる。 (Invention according to claim 5)
The invention according to claim 5 has the following effects in addition to the effects of the invention according to any one of claims 1 to 4.
<Effect> The overall length of the exhaust treatment apparatus can be shortened.
As illustrated in FIGS. 1 and 2, the adjacent DPF case inlet side end portion (7) and the DPF case intermediate portion (7a) are formed with the same diameter without a step, and the DPF case intermediate portion (7a) Since the sensor attachment boss (28) is attached to the outer periphery, the sensor attachment boss (28) can be attached to the outer periphery of the DPF case middle portion (7a) without being restricted by the attachment at the step boundary. The sensor (29) can be sufficiently close to the DOC outlet side end (12), and the DPF inlet side end (10) can be sufficiently close to the sensor (29), thereby shortening the overall length of the exhaust treatment device. can do.

(請求項６に係る発明)
請求項６に係る発明は、次の効果を奏する。
《効果》 ケース連結部の排気ガスの密封性が高い。
図３、図４に例示するように、ＤＰＦケース入口側端部(７)を、このＤＰＦケース入口側端部(７)と隣合うＤＰＦケース中間寄り部(７ａ)よりも縮径させ、このＤＰＦケース入口側端部(７)をＤＯＣケース出口側端部(６)に内嵌させるので、ケース連結部の排気ガスの密封性が高い。 (Invention of Claim 6)
The invention according to claim 6 has the following effects.
<Effect> The sealing property of the exhaust gas in the case connecting portion is high.
As illustrated in FIG. 3 and FIG. 4, the DPF case inlet side end portion (7) is made smaller in diameter than the DPF case intermediate side portion (7 a) adjacent to the DPF case inlet side end portion (7), Since the DPF case inlet side end (7) is fitted into the DOC case outlet side end (6), the exhaust gas sealing property of the case connecting portion is high.

《効果》 ケース連結部のフランジに同じ部品を用いることができる。
図３、図４に例示するように、ＤＰＦケース中間寄り部(７ａ)の外径とＤＯＣケース出口側端部(６)の外径とを同じにし、このＤＰＦケース中間寄り部(７ａ)とＤＯＣケース出口側端部(６)の各外周に、ＤＰＦケースフランジ(３０)とＤＯＣケースフランジ(２１)とをそれぞれ取り付けることにより、内径が同じになるケース連結部のＤＰＦケースフランジ(３０)とＤＯＣケースフランジ(２１)とに同じ部品を用いることができる。 <Effect> The same parts can be used for the flange of the case connecting portion.
As illustrated in FIGS. 3 and 4, the outer diameter of the DPF case intermediate portion (7 a) and the outer diameter of the DOC case outlet side end portion (6) are made the same, and this DPF case intermediate portion (7 a) By attaching the DPF case flange (30) and the DOC case flange (21) to each outer periphery of the DOC case outlet side end (6), The same parts can be used for the DOC case flange (21).

(請求項７に係る発明)
請求項７に係る発明は、請求項６に係る発明の効果に加え、次の効果を奏する。
《効果》 ケース嵌合時にＤＰＦ入口側端部が損傷するのを防止することができる。
図３、図４に例示するように、ＤＰＦケース入口側端部(７)にＤＰＦ入口側端部(１０)を収容したので、ＤＰＦ入口側端部(１０)の周壁がＤＰＦケース入口側端部(７)の外側に露出しておらず、ＤＰＦケース入口側端部(７)をＤＯＣケース出口側端部(６)に内嵌させる場合に、ＤＰＦ入口側端部(１０)の周壁がＤＯＣケース出口側端部(６)に接触することがなく、ケース嵌合時にＤＰＦ入口側端部(１０)が損傷するのを防止することができる。 (Invention of Claim 7)
The invention according to claim 7 has the following effect in addition to the effect of the invention according to claim 6.
<Effect> It is possible to prevent the DPF inlet side end portion from being damaged when the case is fitted.
As illustrated in FIGS. 3 and 4, since the DPF inlet side end portion (10) is accommodated in the DPF case inlet side end portion (7), the peripheral wall of the DPF inlet side end portion (10) is the DPF case inlet side end portion. When the DPF case inlet side end portion (7) is fitted into the DOC case outlet side end portion (6), the peripheral wall of the DPF inlet side end portion (10) is not exposed to the outside of the portion (7). It is possible to prevent the DPF inlet side end portion (10) from being damaged when the case is fitted without contacting the DOC case outlet side end portion (6).

(請求項８に係る発明)
請求項８に係る発明は、請求項７に係る発明の効果に加え、次の効果を奏する。
《効果》 ＤＰＦの再生を速やかに行うことができる。
図４(Ａ)に例示するように、ＤＰＦ入口側端部(１０)とＤＰＦケース入口側端部(７)との各端部周壁相互間に隙間(１１)を保持し、この隙間(１１)をＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間の排気ガス受け渡し空間(１４)に連通させ、ＤＰＦ入口側端部(１０)の周壁を上記隙間(１１)に向けて露出させたので、この隙間(１１)に排気ガス受け渡し空間(１４)内の排気が進入し、排気の熱がＤＰＦ入口側端部(１０)の周壁にその内側からだけでなく、外側からも入熱され、或いは排気の熱によりＤＰＦ入口側端部(１０)の周壁からＤＰＦケース入口側端部(７)への放熱も防止され、ＤＰＦ(３)の周壁の温度が高まり、ＤＰＦ(３)の再生を速やかに行うことができる。 (Invention of Claim 8)
The invention according to claim 8 has the following effect in addition to the effect of the invention according to claim 7.
<Effect> The DPF can be quickly regenerated.
As illustrated in FIG. 4A, a gap (11) is held between the end peripheral walls of the DPF inlet side end (10) and the DPF case inlet side end (7), and the gap (11 ) Communicated with the exhaust gas delivery space (14) between the DOC outlet side end (12) and the DPF inlet side end (10), and the peripheral wall of the DPF inlet side end (10) is connected to the gap (11). The exhaust in the exhaust gas transfer space (14) enters the gap (11), and the heat of the exhaust not only enters the peripheral wall of the DPF inlet side end (10) from the inside, Heat is also input from the outside, or heat from the exhaust is prevented from radiating heat from the peripheral wall of the DPF inlet side end (10) to the DPF case inlet side end (7), and the temperature of the peripheral wall of the DPF (3) increases. The DPF (3) can be quickly regenerated.

(請求項９に係る発明)
請求項９に係る発明は、請求項７に係る発明の効果に加え、次の効果を奏する。
《効果》 ＤＰＦの再生を速やかに行うことができる。
図４(Ｂ)に例示するように、ＤＰＦ入口側端部(１０)とＤＰＦケース入口側端部(７)との各端部周壁相互間に断熱性クッション材(１１ａ)を介在させたので、ＤＰＦ入口側端部(１０)の周壁からＤＰＦケース入口側端部(７)への放熱が防止され、ＤＰＦ(３)の温度を高く維持し、ＤＰＦ(３)の再生を速やかに行うことができる。 (Invention according to claim 9)
The invention according to claim 9 has the following effect in addition to the effect of the invention according to claim 7.
<Effect> The DPF can be quickly regenerated.
As illustrated in FIG. 4B, the heat insulating cushion material (11a) is interposed between the peripheral walls of the end portions of the DPF inlet side end portion (10) and the DPF case inlet side end portion (7). , Heat dissipation from the peripheral wall of the DPF inlet side end (10) to the DPF case inlet side end (7) is prevented, the temperature of the DPF (3) is kept high, and the DPF (3) is quickly regenerated. Can do.

(請求項１０に係る発明)
請求項１０に係る発明は、請求項６から請求項９のいずれかに係る発明の効果に加え、次の効果を奏する。
《効果》 排気処理装置の全長を短くすることができる。
図３、図４に例示するように、隣合うＤＯＣケース出口側端部(６)とＤＯＣケース中間寄り部(６ａ)とを同一径で段差無く形成し、ＤＯＣケース中間寄り部(６ａ)の外周にセンサ取り付けボス(２８)を取り付けたので、段差の境界部分での取り付けの制限を受けることなく、ＤＯＣケース中間寄り部(６ａ)の外周にセンサ取り付けボス(２８)を取り付けることができ、センサ(２９)をＤＯＣ出口側端部(１２)に十分に近づけることができる。
また、ＤＰＦケース入口側端部(７)をＤＯＣケース出口側端部(６)に内嵌させるので、ＤＰＦ入口側端部(１０)をセンサ(２９)に十分に近づけることができる。
このため、排気処理装置の全長を短くすることができる。 (Invention of Claim 10)
The invention according to claim 10 has the following effects in addition to the effects of the invention according to any one of claims 6 to 9.
<Effect> The overall length of the exhaust treatment apparatus can be shortened.
As illustrated in FIG. 3 and FIG. 4, the adjacent DOC case outlet side end portion (6) and the DOC case intermediate portion (6a) are formed with the same diameter without a step, and the DOC case intermediate portion (6a) Since the sensor mounting boss (28) is attached to the outer periphery, the sensor mounting boss (28) can be attached to the outer periphery of the middle portion of the DOC case (6a) without being limited by the attachment at the boundary portion of the step, The sensor (29) can be sufficiently brought close to the DOC outlet side end (12).
Further, since the DPF case inlet side end portion (7) is fitted into the DOC case outlet side end portion (6), the DPF inlet side end portion (10) can be sufficiently brought close to the sensor (29).
For this reason, the full length of the exhaust treatment device can be shortened.

本発明の第１実施形態に係るディーゼルエンジンの排気処理装置装置の縦断側面図である。1 is a longitudinal side view of an exhaust treatment device device for a diesel engine according to a first embodiment of the present invention. 図１の装置の要部を説明する図で、図２(Ａ)は図１の装置の左側ケース連結部の拡大図、図２(Ｂ)はこの左側ケース連結部の変形例の説明図である。FIG. 2A is an enlarged view of the left case connecting portion of the apparatus of FIG. 1, and FIG. 2B is an explanatory view of a modification of the left case connecting portion. is there. 本発明の第２実施形態に係るディーゼルエンジンの排気処理装置装置の縦断側面図である。It is a vertical side view of the exhaust-gas treatment apparatus apparatus of the diesel engine which concerns on 2nd Embodiment of this invention. 図３の装置の要部を説明する図で、図４(Ａ)は図３の装置の左側ケース連結部の拡大図、図４(Ｂ)はこの左側ケース連結部の変形例の説明図である。FIG. 4A is an enlarged view of the left case connecting portion of the apparatus of FIG. 3, and FIG. 4B is an explanatory view of a modification of the left case connecting portion. is there.

図１、図２に示す第１実施形態に係るディーゼルエンジンの排気処理装置について説明する。
図１に示すように、ＤＯＣケース(２)にＤＯＣ(１)を収容し、ＤＰＦケース(４)にＤＰＦ(３)を収容し、ＤＯＣケース出口側端部(６)とＤＰＦケース入口側端部(７)とをＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とを介して離脱自在に連結している。 An exhaust treatment apparatus for a diesel engine according to the first embodiment shown in FIGS. 1 and 2 will be described.
As shown in FIG. 1, DOC (1) is accommodated in DOC case (2), DPF (3) is accommodated in DPF case (4), DOC case outlet side end (6) and DPF case inlet side end The part (7) is detachably connected via a DOC case flange (21) and a DPF case flange (30).

図２(Ａ)(Ｂ)に示すように、ＤＯＣケース出口側端部(６)を、このＤＯＣケース出口側端部(６)と隣合うＤＯＣケース中間寄り部(６ａ)よりも縮径させ、このＤＯＣケース出口側端部(６ａ)をＤＰＦケース入口側端部(７)に内嵌させている。
ＤＯＣケース中間寄り部(６ａ)の外径とＤＰＦケース入口側端部(７)の外径とを同じにし、このＤＯＣケース中間寄り部(６ａ)とＤＰＦケース入口側端部(７)の各外周に、ＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とをそれぞれ設けることにより、内径が同じになるＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とに同じ部品を用いている。
ＤＯＣケース出口側端部(６)にＤＯＣ出口側端部(１２)を収容している。 As shown in FIGS. 2 (A) and 2 (B), the DOC case outlet side end portion (6) is made smaller in diameter than the DOC case intermediate side portion (6a) adjacent to the DOC case outlet side end portion (6). The DOC case outlet side end (6a) is fitted into the DPF case inlet side end (7).
The outer diameter of the DOC case intermediate portion (6a) and the outer diameter of the DPF case inlet side end portion (7) are made the same, and each of the DOC case intermediate portion (6a) and the DPF case inlet side end portion (7) By providing the DOC case flange (21) and the DPF case flange (30) on the outer periphery, the same parts are used for the DOC case flange (21) and the DPF case flange (30) having the same inner diameter.
The DOC outlet side end (12) is accommodated in the DOC case outlet side end (6).

図２(Ａ)に示すように、ＤＯＣ出口側端部(１２)とＤＯＣケース出口側端部(６)との各端部周壁相互間に隙間(１３)を保持し、この隙間(１３)をＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間の排気ガス受け渡し空間(１４)に連通させ、ＤＯＣ出口側端部(１２)の周壁を上記隙間(１３)に向けて露出させている。
図２(Ｂ)に示すように、ＤＯＣ出口側端部(１２)とＤＯＣケース出口側端部(６)との各端部周壁相互間に断熱性クッション材(１３ａ)を介在させてもよい。
断熱性クッション材(１３ａ)にはグラスウールを用いている。 As shown in FIG. 2 (A), a gap (13) is held between the end peripheral walls of the DOC outlet side end (12) and the DOC case outlet side end (6), and the gap (13). Is communicated with the exhaust gas transfer space (14) between the DOC outlet side end (12) and the DPF inlet side end (10), and the peripheral wall of the DOC outlet side end (12) is formed in the gap (13). It is exposed towards.
As shown in FIG. 2 (B), a heat-insulating cushion material (13a) may be interposed between the end peripheral walls of the DOC outlet side end (12) and the DOC case outlet side end (6). .
Glass wool is used for the heat insulating cushioning material (13a).

図２(Ａ)(Ｂ)に示すように、ＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間に配置するセンサ(２９)を取り付けるセンサ取り付けボス(２８)を設けるに当たり、隣合うＤＰＦケース入口側端部(７)とＤＰＦケース中間寄り部(７ａ)とを同一径で段差無く形成し、ＤＰＦケース中間寄り部(７ａ)の外周に、センサ取り付けボス(２８)を取り付けている。   As shown in FIGS. 2A and 2B, a sensor mounting boss (28) for attaching a sensor (29) disposed between the DOC outlet side end (12) and the DPF inlet side end (10) is provided. The adjacent DPF case inlet side end portion (7) and the DPF case intermediate portion (7a) are formed with the same diameter and no step, and the sensor mounting boss (28) is formed on the outer periphery of the DPF case intermediate portion (7a). Is attached.

図１に示すように、ＤＰＦケース出口側端部(８)と排気出口ケース入口側端部(９)とをＤＰＦケースフランジ(３１)と排気出口ケースフランジ(３６)とを介して離脱自在に連結している。
ＤＰＦケース出口側端部(８)を、このＤＰＦケース出口側端部(８)と隣合うＤＰＦケース中間寄り部(８ａ)よりも縮径させ、このＤＰＦケース出口側端部(８)を排気出口ケース入口側端部(９)に内嵌させている。 As shown in FIG. 1, the DPF case outlet side end portion (8) and the exhaust outlet case inlet side end portion (9) are detachable via the DPF case flange (31) and the exhaust outlet case flange (36). It is connected.
The DPF case outlet side end portion (8) has a diameter smaller than that of the DPF case intermediate side portion (8a) adjacent to the DPF case outlet side end portion (8), and the DPF case outlet side end portion (8) is exhausted. It is fitted inside the outlet case inlet side end (9).

ＤＰＦケース中間寄り部(８ａ)の外径と排気出口ケース入口側端部(９)の外径とを同じにし、このＤＰＦケース中間寄り部(８ａ)と排気出口ケース入口側端部(９)の各外周に、ＤＰＦケースフランジ(３１)と排気出口ケースフランジ(３６)とをそれぞれ取り付けることにより、内径が同じになるＤＰＦケースフランジ(３１)と排気出口ケースフランジ(３６)とに同じ部品を用いている。
また、ＤＯＣケース中間寄り部(６ａ)の外径とＤＰＦケース入口側端部(７)の外径、ＤＰＦケース中間寄り部(８ａ)の外径と排気出口ケース入口側端部(９)の外径を同じにし、内径が同じになるＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)と、ＤＰＦケースフランジ(３１)と排気出口ケースフランジ(３６)とに同じ部品を用いている。 The outer diameter of the DPF case middle portion (8a) and the outer diameter of the exhaust outlet case inlet side end portion (9) are made the same, and this DPF case middle portion (8a) and the exhaust outlet case inlet side end portion (9) By attaching a DPF case flange (31) and an exhaust outlet case flange (36) to each outer periphery of the DPF case flange, the same parts are attached to the DPF case flange (31) and the exhaust outlet case flange (36) having the same inner diameter. Used.
Further, the outer diameter of the DOC case intermediate portion (6a) and the outer diameter of the DPF case inlet side end portion (7), the outer diameter of the DPF case intermediate portion (8a) and the exhaust outlet case inlet side end portion (9). The same parts are used for the DOC case flange (21), the DPF case flange (30), the DPF case flange (31), and the exhaust outlet case flange (36) having the same outer diameter and the same inner diameter.

ＤＰＦケース出口側端部(８)にＤＰＦ出口側端部(１６)を収容している。
ＤＰＦ出口側端部(１６)とＤＰＦケース出口側端部(８)との各端部周壁相互間に隙間(１７)を保持し、この隙間(１７)を排気出口ケース(５)内に連通させ、ＤＰＦ出口側端部(１６)の周壁を上記隙間(１７)に向けて露出させている。
ＤＰＦ出口側端部(１６)とＤＰＦケース出口側端部(８)との各端部周壁相互間に断熱性クッション材を介在させてもよい。
断熱性クッション材にはグラスウールを用いる。 The DPF outlet side end portion (16) is accommodated in the DPF case outlet side end portion (8).
A gap (17) is held between the end peripheral walls of the DPF outlet side end (16) and the DPF case outlet side end (8), and the gap (17) communicates with the exhaust outlet case (5). The peripheral wall of the DPF outlet side end portion (16) is exposed toward the gap (17).
A heat insulating cushion material may be interposed between the peripheral walls of the end portions of the DPF outlet side end portion (16) and the DPF case outlet side end portion (8).
Glass wool is used for the heat insulating cushioning material.

図１に示すように、ＤＯＣ(１)は、セラミックのハニカム担体で、酸化触媒を担持させ、セル(１ａ)の両端を開口したフロースルー構造で、セル(１ａ)の内部を排気が通過するようになっている。ＤＯＣケース(２)は、椀型の金属ケース(１８)で構成され、外側に金属カバー(１９)を重ね合わせ、これらの間に断熱材(２０)を充填し、開口しているＤＯＣケース出口側端部(６)を後側に向け、ＤＯＣケース出口側端部(６)とＤＯＣケース中間寄り部(６ａ)の境界側で、ＤＯＣケース中間寄り部(６ａ)の外周にＤＯＣケースフランジ(２１)を取り付け、ＤＯＣ(１)とＤＯＣケース中間寄り部(６ａ)の各周壁間に断熱性クッション材(２２)を配置している。断熱材(２０)と断熱性クッション材(２２)にはいずれもグラスウールを用いている。
ＤＯＣケース(２)内の前寄りで径方向に排気入口管(２５)を貫通させ、排気入口管(２５)の周壁に多数の排気孔(２６)を開孔させている。ＤＯＣケース(２)の強度を確保する等の理由で、排気入口管(２５)を貫通させない場合もある。 As shown in FIG. 1, the DOC (1) is a ceramic honeycomb carrier that carries an oxidation catalyst and has a flow-through structure in which both ends of the cell (1a) are opened, and the exhaust passes through the inside of the cell (1a). It is like that. The DOC case (2) is composed of a bowl-shaped metal case (18), and a metal cover (19) is overlapped on the outside, and a heat insulating material (20) is filled between them, and the DOC case outlet is opened. The DOC case flange (6a) is placed on the outer periphery of the DOC case intermediate portion (6a) on the boundary side between the DOC case outlet side end portion (6) and the DOC case intermediate portion (6a). 21) is attached, and a heat insulating cushioning material (22) is disposed between the peripheral walls of the DOC (1) and the DOC case middle portion (6a). Glass wool is used for both the heat insulating material (20) and the heat insulating cushioning material (22).
The exhaust inlet pipe (25) is penetrated radially in front of the DOC case (2), and a number of exhaust holes (26) are opened in the peripheral wall of the exhaust inlet pipe (25). The exhaust inlet pipe (25) may not be penetrated for reasons such as securing the strength of the DOC case (2).

図１に示すように、ＤＰＦ(３)は、セラミックのハニカム担体で、隣合うセル(３ａ)を交互に目封じたウォールフローモノリスである。セル(３ａ)の内部とセル(３ａ)の壁(３ｂ)を排気が通過し、セル(３ａ)の壁(３ｂ)でＰＭを捕捉する。ＤＰＦケース(４)は、円筒形の金属ケースで、ＤＰＦケース入口側端部(７)の外周にＤＰＦケースフランジ(３０)を取り付け、ＤＰＦケース出口側端部(８)の外周にＤＰＦケースフランジ(３１)を取り付けている。ＤＰＦ(３)とＤＰＦケース(４)の各周壁間に断熱性クッション材(３２)を配置している。断熱性クッション材(３２)にはグラスウールを用いている。ＤＯＣ(１)とＤＰＦ(３)は、規格化された同一外径のものである。   As shown in FIG. 1, DPF (3) is a wall flow monolith in which adjacent cells (3a) are alternately plugged in a ceramic honeycomb carrier. The exhaust gas passes through the inside of the cell (3a) and the wall (3b) of the cell (3a), and captures PM by the wall (3b) of the cell (3a). The DPF case (4) is a cylindrical metal case. A DPF case flange (30) is attached to the outer periphery of the DPF case inlet side end (7), and the DPF case flange is attached to the outer periphery of the DPF case outlet side end (8). (31) is attached. A heat insulating cushion material (32) is disposed between the peripheral walls of the DPF (3) and the DPF case (4). Glass wool is used for the heat insulating cushioning material (32). DOC (1) and DPF (3) have the same standardized outer diameter.

排気出口ケース(５)は、椀型の金属ケース(３３)で構成され、その外側に金属カバー(３４)を重ね、これらの間に断熱材(３５)を充填し、開口している排気出口ケース入口側端部(９)を前側に向け、排気出口ケース入口側端部(９)の外周に排気出口ケースフランジ(３６)を設けている。断熱材(３５)にはグラスウールを用いている。排気出口ケース(５)内で径方向に排気出口管(３７)を貫通させ、排気出口管(３７)の周壁に多数の排気孔(３８)を開孔させている。排気出口ケース(５)の強度を確保する等の理由で、排気出口管(３７)を貫通させない場合もある。
ＤＯＣケース(２)、ＤＰＦケース(４)、排気出口ケース(５)は、断面が円形の椀形または筒形に形成しているが、これらは、断面が楕円その他の異形の椀形または筒形に形成してもよい。 The exhaust outlet case (5) is composed of a bowl-shaped metal case (33), and a metal cover (34) is overlapped on the outside thereof, and a heat insulating material (35) is filled therebetween, and the exhaust outlet is opened. An exhaust outlet case flange (36) is provided on the outer periphery of the exhaust outlet case inlet end (9) with the case inlet end (9) facing forward. Glass wool is used for the heat insulating material (35). In the exhaust outlet case (5), the exhaust outlet pipe (37) is penetrated in the radial direction, and a number of exhaust holes (38) are opened in the peripheral wall of the exhaust outlet pipe (37). The exhaust outlet pipe (37) may not be penetrated for reasons such as securing the strength of the exhaust outlet case (5).
The DOC case (2), the DPF case (4), and the exhaust outlet case (5) are formed in a bowl shape or a cylinder shape with a circular cross section. It may be formed into a shape.

ＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とを重ね合わせ、これらをボルトナットで連結することにより、ＤＯＣケース出口側端部(６)にＤＰＦケース入口側端部(７)を離脱自在に接続している。ボルトナットのナット(４２)は、ＤＯＣケース(２)側に配置し、ボルト(４３)は、ＤＰＦケース(４)側に配置している。ＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)との間にはガスケット(４６)を挟み付けている。
ＤＰＦケースフランジ(３１)と排気出口ケースフランジ(３６)とを重ね合わせ、これらをボルトナットで連結することにより、ＤＰＦケース出口側端部(８)に排気出口ケース入口側端部(９)を離脱自在に接続している。ボルトナットのナット(４４)は、排気出口ケース(５)側に配置し、ボルト(４５)は、ＤＰＦケース(４)側に配置している。ＤＰＦケースフランジ(３１)と排気出口ケースフランジ(３６)との間には、ガスケット(４７)を挟み付けている。 By overlapping the DOC case flange (21) and the DPF case flange (30) and connecting them with bolts and nuts, the DPF case inlet side end (7) can be freely detached from the DOC case outlet side end (6). Connected to. The nut (42) of the bolt and nut is arranged on the DOC case (2) side, and the bolt (43) is arranged on the DPF case (4) side. A gasket (46) is sandwiched between the DOC case flange (21) and the DPF case flange (30).
By overlapping the DPF case flange (31) and the exhaust outlet case flange (36) and connecting them with bolts and nuts, the exhaust outlet case inlet end (9) is connected to the DPF case outlet end (8). Removably connected. The nut (44) of the bolt and nut is arranged on the exhaust outlet case (5) side, and the bolt (45) is arranged on the DPF case (4) side. A gasket (47) is sandwiched between the DPF case flange (31) and the exhaust outlet case flange (36).

ＤＯＣ(１)の上流でＤＯＣケース(２)の周壁にセンサ取り付けボス(２３)を設け、このセンサ取り付けボス(２３)にＤＯＣ上流側排気温度センサ(２４)を取り付けている。ＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間で、ＤＰＦケース中間寄り部(７ａ)の外周にセンサ取り付けボス(２８)を取り付け、このセンサ取り付けボス(２８)にＤＰＦ入口側排気温度センサ(２９)を取り付けている。ＤＰＦ(３)と排気出口管(３７)の間で、排気出口ケース(５)の周壁にセンサ取り付けボス(４０)を設け、このセンサ取り付けボス(４０)にＤＰＦ出口側排気温度センサ(４１)を取り付けている。ＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間で、ＤＰＦケース中間寄り部(７ａ)の周壁にＤＰＦ入口側配管取り付けボス(４８)を設け、このＤＰＦ入口側配管取り付けボス(４８)にＤＰＦ入口側排気圧導入配管(４９)を取り付けている。ＤＰＦ(３)と排気出口管(３７)の間で、排気出口ケース(５)の周壁にＤＰＦ出口側配管取り付けボス(５０)を設け、このＤＰＦ出口側配管取り付けボス(５０)にＤＰＦ出口側排気圧導入配管(５１)を取り付けている。ＤＰＦ入口側排気圧導入配管(４９)とＤＰＦ出口側排気圧導入配管(５１)とは、差圧センサ(５２)に接続されている。   A sensor mounting boss (23) is provided on the peripheral wall of the DOC case (2) upstream of the DOC (1), and a DOC upstream side exhaust temperature sensor (24) is mounted on the sensor mounting boss (23). A sensor mounting boss (28) is mounted on the outer periphery of the DPF case middle portion (7a) between the DOC outlet side end (12) and the DPF inlet side end (10). A DPF inlet side exhaust temperature sensor (29) is attached. A sensor mounting boss (40) is provided on the peripheral wall of the exhaust outlet case (5) between the DPF (3) and the exhaust outlet pipe (37), and the DPF outlet side exhaust temperature sensor (41) is provided on the sensor mounting boss (40). Is attached. Between the DOC outlet side end portion (12) and the DPF inlet side end portion (10), a DPF inlet side pipe mounting boss (48) is provided on the peripheral wall of the DPF case middle portion (7a), and this DPF inlet side pipe A DPF inlet side exhaust pressure introduction pipe (49) is attached to the attachment boss (48). Between the DPF (3) and the exhaust outlet pipe (37), a DPF outlet side pipe mounting boss (50) is provided on the peripheral wall of the exhaust outlet case (5), and the DPF outlet side pipe mounting boss (50) is connected to the DPF outlet side. An exhaust pressure introduction pipe (51) is attached. The DPF inlet side exhaust pressure introduction pipe (49) and the DPF outlet side exhaust pressure introduction pipe (51) are connected to a differential pressure sensor (52).

ＤＯＣ上流側排気温度センサ(２４)、ＤＰＦ入口側排気温度センサ(２９)、ＤＰＦ出口側排気温度センサ(４１)、差圧センサ(５２)、エンジン目標回転数検出センサ(図外)、エンジン実回転数検出センサ(図外)が、エンジンＥＣＵ(図外)に接続され、このエンジンＥＣＵにコモンレール(図外)のインジェクタの電磁弁(図外)が接続されている
エンジン負荷、エンジン回転数、ＤＯＣ上流側排気温度センサ(２４)による検出排気温度、差圧センサ(２４)によるＤＰＦ(３)の上流と下流の差圧等に基づいて、ＤＰＦ(３)でのＰＭの堆積量を推定し、ＰＭの堆積推定量が所定の再生必要量に至った場合には、エンジンＥＣＵの指令に基づいてＤＰＦ(３)の再生処理を行う。 DOC upstream side exhaust temperature sensor (24), DPF inlet side exhaust temperature sensor (29), DPF outlet side exhaust temperature sensor (41), differential pressure sensor (52), engine target speed detection sensor (not shown), engine actual A rotation speed detection sensor (not shown) is connected to the engine ECU (not shown), and an electromagnetic valve (not shown) of the injector of the common rail (not shown) is connected to the engine ECU. Based on the exhaust temperature detected by the DOC upstream exhaust temperature sensor (24), the differential pressure upstream and downstream of the DPF (3) by the differential pressure sensor (24), etc., the PM accumulation amount in the DPF (3) is estimated. When the estimated accumulation amount of PM reaches a predetermined regeneration required amount, the regeneration process of the DPF (3) is performed based on the command of the engine ECU.

ＤＰＦ(３)の再生処理は、次の通りである。
ＤＯＣ上流側排気温度センサ(２４)での検出排気温度が所定のＤＯＣ活性化温度に達していない場合には、アフター噴射を行い、排気温度をＤＯＣ活性化温度まで上昇させる。排気温度がＤＯＣ活性化温度を越えると、ポスト噴射を行い、排気に燃料を混入させ、この燃料をＤＯＣ(１)で酸化燃焼させることにより、排気の温度を上昇させ、排気の熱により、ＰＭを焼却除去して、ＤＰＦ(３)を再生する。この場合、ＤＰＦ入口側排気温度センサ(２９)での検出排気温度に応じてポスト噴射量を調節する。そして、ＤＰＦ出口側排気温度センサ(４１)での検出排気温度が所定の異常検出温度に達すると、ポスト噴射を停止或いは大幅に減少させる。 The regeneration process of DPF (3) is as follows.
When the exhaust temperature detected by the DOC upstream side exhaust temperature sensor (24) does not reach the predetermined DOC activation temperature, after injection is performed, and the exhaust temperature is raised to the DOC activation temperature. When the exhaust temperature exceeds the DOC activation temperature, post-injection is performed, fuel is mixed into the exhaust, and this fuel is oxidized and burned by DOC (1), thereby increasing the temperature of the exhaust, and the heat of the exhaust causes PM to Is removed by incineration to regenerate the DPF (3). In this case, the post injection amount is adjusted according to the exhaust temperature detected by the DPF inlet side exhaust temperature sensor (29). When the exhaust temperature detected by the DPF outlet side exhaust temperature sensor (41) reaches a predetermined abnormality detection temperature, the post injection is stopped or greatly reduced.

図３、図４に示す第２実施形態は、図１、図２に示す第１実施形態と、次の点で異なる。
図４(Ａ)(Ｂ)に示すように、ＤＰＦケース入口側端部(７)を、このＤＰＦケース入口側端部(７)と隣合うＤＰＦケース中間寄り部(７ａ)よりも縮径させ、このＤＰＦケース入口側端部(７)をＤＯＣケース出口側端部(６)に内嵌させている。
ＤＰＦケース中間寄り部(７ａ)の外径とＤＯＣケース出口側端部(６)の外径とを同じにし、このＤＰＦケース中間寄り部(７ａ)とＤＯＣケース出口側端部(６)の各外周に、ＤＰＦケースフランジ(３０)とＤＯＣケースフランジ(２１)とをそれぞれ取り付けることにより、内径が同じになるＤＰＦケースフランジ(３０)とＤＯＣケースフランジ(２１)とに同じ部品を用いている。
ＤＰＦケース入口側端部(７)にＤＰＦ入口側端部(１０)を収容している。 The second embodiment shown in FIGS. 3 and 4 differs from the first embodiment shown in FIGS. 1 and 2 in the following points.
As shown in FIGS. 4 (A) and 4 (B), the DPF case inlet side end portion (7) has a smaller diameter than the DPF case intermediate side portion (7a) adjacent to the DPF case inlet side end portion (7). The DPF case inlet side end (7) is fitted into the DOC case outlet side end (6).
The outer diameter of the DPF case intermediate portion (7a) and the outer diameter of the DOC case outlet side end portion (6) are made the same, and each of the DPF case intermediate portion (7a) and the DOC case outlet side end portion (6) By attaching the DPF case flange (30) and the DOC case flange (21) to the outer periphery, the same parts are used for the DPF case flange (30) and the DOC case flange (21) having the same inner diameter.
The DPF inlet side end portion (10) is accommodated in the DPF case inlet side end portion (7).

図４(Ａ)に示すように、ＤＰＦ入口側端部(１０)とＤＰＦケース入口側端部(７)との各端部周壁相互間に隙間(１１)を保持し、この隙間(１１)をＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間の排気ガス受け渡し空間(１４)に連通させ、ＤＰＦ入口側端部(１０)の周壁を上記隙間(１１)に向けて露出させている。
図４(Ｂ)に示すように、ＤＰＦ入口側端部(１０)とＤＰＦケース入口側端部(７)との各端部周壁相互間に断熱性クッション材(１１ａ)を介在させてもよい。断熱性クッション材(１１ａ)にはグラスウールを用いる。 As shown in FIG. 4 (A), a gap (11) is held between the end peripheral walls of the DPF inlet side end (10) and the DPF case inlet side end (7), and this gap (11). Is communicated with the exhaust gas transfer space (14) between the DOC outlet side end (12) and the DPF inlet side end (10), and the peripheral wall of the DPF inlet side end (10) is formed in the gap (11). It is exposed towards.
As shown in FIG. 4B, a heat insulating cushioning material (11a) may be interposed between the peripheral walls of the end portions of the DPF inlet side end portion (10) and the DPF case inlet side end portion (7). . Glass wool is used for the heat insulating cushion material (11a).

図４(Ａ)(Ｂ)に示すように、ＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間に配置するセンサ(２９)を取り付けるセンサ取り付けボス(２８)を設けるに当たり、隣合うＤＯＣケース出口側端部(６)とＤＯＣケース中間寄り部(６ａ)とを同一径で段差無く形成し、ＤＯＣケース中間寄り部(６ａ)の外周にセンサ取り付けボス(２８)を取り付けている。
図３に示すように、ＤＰＦケース出口側端部(８)と排気出口ケース入口側端部(９)とは嵌合ではなく、同一径で突合せ状になっている。
他の構成は、第１実施形態と同じであり、第１実施形態と同一の要素には、図１、図２と同じ符号を付しておく。 As shown in FIGS. 4A and 4B, a sensor mounting boss (28) for attaching a sensor (29) disposed between the DOC outlet side end (12) and the DPF inlet side end (10) is provided. The adjacent DOC case outlet side end portion (6) and the DOC case intermediate side portion (6a) are formed with the same diameter without a step, and the sensor mounting boss (28) is provided on the outer periphery of the DOC case intermediate side portion (6a). It is attached.
As shown in FIG. 3, the DPF case outlet side end portion (8) and the exhaust outlet case inlet side end portion (9) are not fitted, but are butted with the same diameter.
Other configurations are the same as those in the first embodiment, and the same reference numerals as those in FIGS. 1 and 2 are given to the same elements as those in the first embodiment.

(１) ＤＯＣ
(２) ＤＯＣケース
(３) ＤＰＦ
(４) ＤＰＦケース
(６) ＤＯＣケース出口側端部
(６ａ) ＤＯＣケース中間寄り部
(７) ＤＰＦケース入口側端部
(７ａ) ＤＰＦケース中間寄り部
(１０) ＤＰＦ入口側端部
(１１) 隙間
(１３) 隙間
(１３ａ) 断熱性クッション材
(１４) 排気ガス受け渡し空間
(２１) ＤＯＣケースフランジ
(２８) センサ取り付けボス
(３０) ＤＰＦケースフランジ (1) DOC
(2) DOC case
(3) DPF
(4) DPF case
(6) DOC case outlet side end
(6a) Middle part of DOC case
(7) DPF case inlet side end
(7a) Middle part of DPF case
(10) DPF inlet side end
(11) Clearance
(13) Clearance
(13a) Insulating cushion material
(14) Exhaust gas delivery space
(21) DOC case flange
(28) Sensor mounting boss
(30) DPF case flange

Claims (10)

ＤＯＣケース(２)にＤＯＣ(１)を収容し、ＤＰＦケース(４)にＤＰＦ(３)を収容し、ＤＯＣケース出口側端部(６)とＤＰＦケース入口側端部(７)とをＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とを介して離脱自在に連結した、ディーゼルエンジンの排気処理装置において、
ＤＯＣケース出口側端部(６)を、このＤＯＣケース出口側端部(６)と隣合うＤＯＣケース中間寄り部(６ａ)よりも縮径させ、このＤＯＣケース出口側端部(６ａ)をＤＰＦケース入口側端部(７)に内嵌させ、
ＤＯＣケース中間寄り部(６ａ)の外径とＤＰＦケース入口側端部(７)の外径とを同じにし、このＤＯＣケース中間寄り部(６ａ)とＤＰＦケース入口側端部(７)の各外周に、ＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とをそれぞれ取り付けることにより、内径が同じになるＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とに同じ部品を用いた、ことを特徴とするディーゼルエンジンの排気処理装置。 The DOC case (2) accommodates the DOC (1), the DPF case (4) accommodates the DPF (3), and the DOC case outlet side end (6) and the DPF case inlet side end (7) are connected to the DOC case. In an exhaust treatment device for a diesel engine, which is detachably connected via a case flange (21) and a DPF case flange (30),
The diameter of the DOC case outlet side end (6) is made smaller than that of the DOC case middle edge (6a) adjacent to the DOC case outlet side end (6), and the DOC case outlet side end (6a) is connected to the DPF. Fit inside the case entrance end (7),
The outer diameter of the DOC case intermediate portion (6a) and the outer diameter of the DPF case inlet side end portion (7) are made the same, and each of the DOC case intermediate portion (6a) and the DPF case inlet side end portion (7) The same parts were used for the DOC case flange (21) and the DPF case flange (30) having the same inner diameter by attaching the DOC case flange (21) and the DPF case flange (30) to the outer periphery. An exhaust treatment device for diesel engines. 請求項１に記載したディーゼルエンジンの排気処理装置において、
ＤＯＣケース出口側端部(６)にＤＯＣ出口側端部(１２)を収容した、ことを特徴とするディーゼルエンジンの排気処理装置。 In the exhaust treatment device of the diesel engine according to claim 1,
An exhaust treatment device for a diesel engine, characterized in that a DOC outlet side end portion (12) is accommodated in a DOC case outlet side end portion (6). 請求項２に記載したディーゼルエンジンの排気処理装置において、
ＤＯＣ出口側端部(１２)とＤＯＣケース出口側端部(６)との各端部周壁相互間に隙間(１３)を保持し、この隙間(１３)をＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間の排気ガス受け渡し空間(１４)に連通させ、ＤＯＣ出口側端部(１２)の周壁を上記隙間(１３)に向けて露出させた、ことを特徴とするディーゼルエンジンの排気処理装置。 The exhaust gas treatment apparatus for a diesel engine according to claim 2,
A gap (13) is held between the end peripheral walls of the DOC outlet side end (12) and the DOC case outlet side end (6), and this gap (13) is connected to the DOC outlet side end (12). The exhaust gas delivery space (14) between the DPF inlet side end portion (10) and the peripheral wall of the DOC outlet side end portion (12) is exposed toward the gap (13). Diesel engine exhaust treatment equipment. 請求項２に記載したディーゼルエンジンの排気処理装置において、
ＤＯＣ出口側端部(１２)とＤＯＣケース出口側端部(６)との各端部周壁相互間に断熱性クッション材(１３ａ)を介在させた、ことを特徴とするディーゼルエンジンの排気処理装置。 In the exhaust treatment device for a diesel engine according to claim 2,
An exhaust treatment apparatus for a diesel engine, characterized in that a heat-insulating cushion material (13a) is interposed between the end peripheral walls of the DOC outlet side end (12) and the DOC case outlet side end (6). . 請求項１から請求項４のいずれかに記載したディーゼルエンジンの排気処理装置において、
ＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間に配置するセンサ(２９)を取り付けるセンサ取り付けボス(２８)を設けるに当たり、
隣合うＤＰＦケース入口側端部(７)とＤＰＦケース中間寄り部(７ａ)とを同一径で段差無く形成し、ＤＰＦケース中間寄り部(７ａ)の外周に、センサ取り付けボス(２８)を取り付けた、ことを特徴とするディーゼルエンジンの排気処理装置。 In the exhaust treatment device of the diesel engine according to any one of claims 1 to 4,
In providing the sensor mounting boss (28) for mounting the sensor (29) disposed between the DOC outlet side end (12) and the DPF inlet side end (10),
The adjacent DPF case inlet side end portion (7) and the DPF case intermediate portion (7a) are formed with the same diameter and no step, and the sensor mounting boss (28) is attached to the outer periphery of the DPF case intermediate portion (7a). An exhaust treatment device for a diesel engine characterized by that. ＤＯＣケース(２)にＤＯＣ(１)を収容し、ＤＰＦケース(４)にＤＰＦ(３)を収容し、ＤＯＣケース出口側端部(６)とＤＰＦケース入口側端部(７)とをＤＯＣケースフランジ(２１)とＤＰＦケースフランジ(３０)とを介して離脱自在に連結した、ディーゼルエンジンの排気処理装置において、
ＤＰＦケース入口側端部(７)を、このＤＰＦケース入口側端部(７)と隣合うＤＰＦケース中間寄り部(７ａ)よりも縮径させ、このＤＰＦケース入口側端部(７)をＤＯＣケース出口側端部(６)に内嵌させ、
ＤＰＦケース中間寄り部(７ａ)の外径とＤＯＣケース出口側端部(６)の外径とを同じにし、このＤＰＦケース中間寄り部(７ａ)とＤＯＣケース出口側端部(６)の各外周に、ＤＰＦケースフランジ(３０)とＤＯＣケースフランジ(２１)とをそれぞれ取り付けることにより、内径が同じになるＤＰＦケースフランジ(３０)とＤＯＣケースフランジ(２１)とに同じ部品を用いた、ことを特徴とするディーゼルエンジンの排気処理装置。 The DOC case (2) accommodates the DOC (1), the DPF case (4) accommodates the DPF (3), and the DOC case outlet side end (6) and the DPF case inlet side end (7) are connected to the DOC case. In an exhaust treatment device for a diesel engine, which is detachably connected via a case flange (21) and a DPF case flange (30),
The DPF case inlet side end portion (7) has a diameter smaller than the DPF case intermediate side portion (7a) adjacent to the DPF case inlet side end portion (7), and the DPF case inlet side end portion (7) is DOC. Fit inside the case exit end (6),
The outer diameter of the DPF case intermediate portion (7a) and the outer diameter of the DOC case outlet side end portion (6) are made the same, and each of the DPF case intermediate portion (7a) and the DOC case outlet side end portion (6) The same parts were used for the DPF case flange (30) and the DOC case flange (21) having the same inner diameter by attaching the DPF case flange (30) and the DOC case flange (21) to the outer periphery. An exhaust treatment device for diesel engines. 請求項６に記載したディーゼルエンジンの排気処理装置において、
ＤＰＦケース入口側端部(７)にＤＰＦ入口側端部(１０)を収容した、ことを特徴とするディーゼルエンジンの排気処理装置。 The exhaust gas treatment apparatus for a diesel engine according to claim 6,
An exhaust treatment apparatus for a diesel engine, wherein the DPF inlet side end portion (10) is accommodated in the DPF case inlet side end portion (7). 請求項７に記載したディーゼルエンジンの排気処理装置において、
ＤＰＦ入口側端部(１０)とＤＰＦケース入口側端部(７)との各端部周壁相互間に隙間(１１)を保持し、この隙間(１１)をＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間の排気ガス受け渡し空間(１４)に連通させ、ＤＰＦ入口側端部(１０)の周壁を上記隙間(１１)に向けて露出させた、ことを特徴とするディーゼルエンジンの排気処理装置。 In the exhaust treatment device for a diesel engine according to claim 7,
A gap (11) is held between the end peripheral walls of the DPF inlet side end (10) and the DPF case inlet side end (7), and this gap (11) is connected to the DOC outlet side end (12). The exhaust gas passing space (14) between the DPF inlet side end portion (10) is communicated, and the peripheral wall of the DPF inlet side end portion (10) is exposed toward the gap (11). Diesel engine exhaust treatment equipment. 請求項７に記載したディーゼルエンジンの排気処理装置において、
ＤＰＦ入口側端部(１０)とＤＰＦケース入口側端部(７)との各端部周壁相互間に断熱性クッション材(１１ａ)を介在させた、ことを特徴とするディーゼルエンジンの排気処理装置。 In the exhaust treatment device for a diesel engine according to claim 7,
An exhaust treatment apparatus for a diesel engine, characterized in that a heat insulating cushioning material (11a) is interposed between the peripheral walls of the end portions of the DPF inlet side end portion (10) and the DPF case inlet side end portion (7). . 請求項６から請求項９のいずれかに記載したディーゼルエンジンの排気処理装置において、
ＤＯＣ出口側端部(１２)とＤＰＦ入口側端部(１０)との間に配置するセンサ(２９)を取り付けるセンサ取り付けボス(２８)を設けるに当たり、
隣合うＤＯＣケース出口側端部(６)とＤＯＣケース中間寄り部(６ａ)とを同一径で段差無く形成し、ＤＯＣケース中間寄り部(６ａ)の外周にセンサ取り付けボス(２８)を取り付けた、ことを特徴とするディーゼルエンジンの排気処理装置。 In the exhaust treatment device for a diesel engine according to any one of claims 6 to 9,
In providing the sensor mounting boss (28) for mounting the sensor (29) disposed between the DOC outlet side end (12) and the DPF inlet side end (10),
The adjacent DOC case outlet side end portion (6) and the DOC case intermediate portion (6a) are formed with the same diameter without a step, and the sensor mounting boss (28) is attached to the outer periphery of the DOC case intermediate portion (6a). An exhaust treatment device for a diesel engine, characterized by that.
JP2009215445A 2009-09-17 2009-09-17 Diesel engine exhaust treatment equipment Expired - Fee Related JP5161179B2 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003120277A (en) * 2001-08-06 2003-04-23 Komatsu Ltd Exhaust emission control device of internal combustion engine
JP2004263594A (en) * 2003-02-28 2004-09-24 Calsonic Kansei Corp Diesel particulate filter device
JP2004263593A (en) * 2003-02-28 2004-09-24 Calsonic Kansei Corp Diesel particulate filter device
JP2009085171A (en) * 2007-10-02 2009-04-23 Mitsubishi Fuso Truck & Bus Corp Exhaust emission control device in engine
WO2010055717A1 (en) * 2008-11-11 2010-05-20 日立建機株式会社 Exhaust gas processing device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003120277A (en) * 2001-08-06 2003-04-23 Komatsu Ltd Exhaust emission control device of internal combustion engine
JP2004263594A (en) * 2003-02-28 2004-09-24 Calsonic Kansei Corp Diesel particulate filter device
JP2004263593A (en) * 2003-02-28 2004-09-24 Calsonic Kansei Corp Diesel particulate filter device
JP2009085171A (en) * 2007-10-02 2009-04-23 Mitsubishi Fuso Truck & Bus Corp Exhaust emission control device in engine
WO2010055717A1 (en) * 2008-11-11 2010-05-20 日立建機株式会社 Exhaust gas processing device

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