JPS59145318A - Exhaust gas purifier - Google Patents
Exhaust gas purifierInfo
- Publication number
- JPS59145318A JPS59145318A JP58018024A JP1802483A JPS59145318A JP S59145318 A JPS59145318 A JP S59145318A JP 58018024 A JP58018024 A JP 58018024A JP 1802483 A JP1802483 A JP 1802483A JP S59145318 A JPS59145318 A JP S59145318A
- Authority
- JP
- Japan
- Prior art keywords
- dpf
- exhaust
- exhaust gas
- burner
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/031—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start
- F01N3/032—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start during filter regeneration only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ディーゼルエンジンの排ガス浄化装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust gas purification device for a diesel engine.
従来のディーゼルエンジン用排ガス浄化装置には２つの
型式があり、第１従来例はディーゼルパティキーレート
フィル２り（以下ＤＰＦと略称）とバーナをエンジンル
ームに搭載し第２従来例はＤＰＦヲブリマフラーの代シ
としてメーンマフラー （７） 前に搭載し、バーナは
エンジンルーム内に搭載したものがあった。前者はコン
パクトな反面スペースの制約が大で望ましい特性が得ら
れず、後者は配置の自由度が大きくとれる利点はあるが
、バーナとＤＰＦの距離が大となシパーナの排ガス温度
の低下が大となる欠点があった。There are two types of conventional exhaust gas purification devices for diesel engines.The first conventional example is equipped with a diesel particulate filter 2 (hereinafter referred to as DPF) and a burner in the engine room, and the second conventional example is equipped with a DPF dual muffler. As an alternative, there was one that was mounted in front of the main muffler (7) and the burner was mounted in the engine room. Although the former is compact, it is difficult to obtain desirable characteristics due to large space constraints, while the latter has the advantage of greater freedom in placement, but the distance between the burner and the DPF is large, resulting in a significant drop in the exhaust gas temperature of the sipana. There was a drawback.
これらの従来装置は、いづれの場合もＤＰＦ再生運転時
エンジンの排気圧の上昇を防止するため、パイプやスパ
イダが必要で通常の排気管とバイパスパイプの両方にマ
フラーが必要であった。In any case, these conventional devices require a pipe or spider to prevent an increase in engine exhaust pressure during DPF regeneration operation, and mufflers are required for both the normal exhaust pipe and the bypass pipe.
本発明の目的は、前記問題点を解消し、ＤＰＦの捕集効
率を向上させるとともにマフラーの使用数も減少できる
排ガス浄化装置を提供するにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an exhaust gas purification device that can solve the above-mentioned problems, improve the collection efficiency of the DPF, and reduce the number of mufflers used.
本発明に係る排ガス浄化装置は、−ＤＰＦの最下流にお
き、前記フィルタと→フラーの間にバーナおよび排気切
換バルブを配設し、前記フィルタ再生時はエンジンの排
ガスをパイ・ぐス・ぐイブに流すようにして前記目的を
達成するよう構成したものである。The exhaust gas purification device according to the present invention is provided with a burner and an exhaust switching valve disposed at the most downstream side of the -DPF between the filter and the fuller, and when the filter is regenerated, the exhaust gas from the engine is pipe-gas-glued. The system is configured to achieve the above purpose by allowing the data to flow on a regular basis.
以下本発明の一実施例を添付図面に基づいて説明する。An embodiment of the present invention will be described below based on the accompanying drawings.
第１図（、） 、 ’（ｂ）は本発明に係る排ガス浄化
装置の第１実施例で１は車体、２はエンジン、３は排気
管、４はノリマフラー、５はメーンマフラー、６ｕバー
ｆ、７はＤＰＦ、８は切換バルブ、９はバイノｅスノｅ
イブ、１ｏは排気冷却器である。ここでマフラーは何個
あってもよく要はＤＰＦは排気系の最下流構成となって
いるのが主要点である。Figures 1(,) and 1(b) show a first embodiment of the exhaust gas purification device according to the present invention; 1 is a vehicle body, 2 is an engine, 3 is an exhaust pipe, 4 is a Nori muffler, 5 is a main muffler, and 6U bar. f, 7 is DPF, 8 is switching valve, 9 is bino e snow e
Eve and 1o are exhaust coolers. The main point here is that the DPF is the most downstream configuration of the exhaust system.
次に前記実施例の作用について説明する。Next, the operation of the above embodiment will be explained.
（、） 通常運転時は、排気切換バルブ８をＤＰＦ
７方向に切９換え排気中の・ぐティキュレート（以下Ｐ
ｅｔと略称）をＤＰＦ ７でろ過し排ガスを浄化する。(,) During normal operation, the exhaust switching valve 8 is set to DPF.
・Guticulate during exhaust by switching in 7 directions (hereinafter referred to as P)
ET) is filtered with DPF 7 to purify the exhaust gas.
ＤＰＦ ７にＰｃｔが堆積しろ過抵抗が増加するとＤＰ
Ｆ’７の再生を行う。When Pct accumulates on DPF 7 and filtration resistance increases, DP
Play F'7.
ω）再生運転時には排気切換バルブ８をパイ・ぞスパイ
ｆ９方向に切り換え外気に放出する。同時にバーナ６を
点火してＤＰＦ’ ７ Ｋ堆積したＰｃｔをバーナ６よ
シの火炎で焼却し、ＤＰＦ ７の再生を行っている。な
お再生時ＤＰＦ ７を通過した排ガスは高温のまま排出
される可能性もあるので、此の点を配慮し排気冷却器を
装着し排ガスの冷却を行う場合もある。ω) During regeneration operation, the exhaust switching valve 8 is switched to the pie-zospi f9 direction to discharge the gas to the outside air. At the same time, the burner 6 is ignited to incinerate the Pct deposited in the DPF' 7 K with the flame of the burner 6, thereby regenerating the DPF 7. Note that there is a possibility that the exhaust gas that has passed through the DPF 7 during regeneration is discharged while remaining at a high temperature, so in consideration of this point, an exhaust cooler may be installed to cool the exhaust gas.
排気系の後流にＤＰＦ・７を配置するととは通常スに一
ス的に有利であり、特に小型トラックの場合荷箱の下は
スに一スが広い、又後流はど排気ガス温度が下妙→、体
積（流速）が減少するためＤＰＦ７による排気抵抗が少
く出力低下も少い。またス硬−ス上のメリットを生がし
大型ＤＰＦ ７を装着すれば排気抵抗は増々減少し相乗
効果が得られる。Placing the DPF 7 in the wake of the exhaust system is usually advantageous, especially in the case of small trucks, the space under the cargo box is wide, and the exhaust gas temperature in the wake is very low. However, since the volume (flow velocity) decreases, there is less exhaust resistance due to the DPF 7, and the output decreases less. In addition, if you take advantage of the advantages of the base and install a large DPF 7, the exhaust resistance will further decrease and a synergistic effect will be obtained.
さらにス被−スメリットによりバーナ６をＤＰＦ ７の
近傍に配置し、バーナ排ガス温度低下を最小にできる。Furthermore, the burner 6 can be disposed near the DPF 7 due to the advantage of the space, thereby minimizing the decrease in burner exhaust gas temperature.
又排気系の後流になるほどＰｅｔの粒子径が大きくなる
のでＤＰＦ ７での捕集効率も向上できる。またＤＰＦ
７をマフラー４，５の上流におくとＤＰＦ系及びパイ
・やス系両排気管に各々マフラーが必要だが本発明では
その必要はない。さらにパイ・ぐス９の長さも最小にで
きるなどの効果がある。Furthermore, since the particle size of Pet becomes larger toward the downstream of the exhaust system, the collection efficiency of the DPF 7 can also be improved. Also DPF
7 is placed upstream of the mufflers 4 and 5, a muffler is required for both the DPF system and the piston system exhaust pipe, but this is not necessary in the present invention. Furthermore, the length of the pi-gusu 9 can also be minimized.
第２図はバーナ位置とＤＰＦ前がス温との関係グラフで
バーナがら遠ざがるほどＤＰＦ前温度が低下る。FIG. 2 is a graph showing the relationship between the burner position and the temperature in front of the DPF, and the further away from the burner, the lower the temperature in front of the DPF.
第３図は・ぐ−ナ位置とＤＰＦ前ガス温か６０ｏ℃にな
る時間を示したもので縦軸にはバーナよシの燃料量をと
ったグラフである。バーナからＤＰＦが遠ざかるほど温
度上昇が遅くなシこれをカバーするため大量の燃料が必
要となることを示している。Fig. 3 is a graph showing the burner position and the time required for the gas temperature before the DPF to reach 60°C, and the vertical axis shows the amount of fuel in and out of the burner. This shows that the farther the DPF is from the burner, the slower the temperature rise, which means that a large amount of fuel is required to compensate for this.
図中ｔはＤＰＦ前からバーナまでの距離、Ｔは最終到達
温度を示している。なおＡ点について本グラフについて
説明すると１０ ｃｃ／ｍｉ ｎで燃料を供給し、ｌｍ
１ｎ経過するとＤＰＦ前ガス温が６００℃となるが時間
が経過すれば最高７８０℃まで上昇することを示してい
る。In the figure, t indicates the distance from the front of the DPF to the burner, and T indicates the final temperature reached. To explain this graph regarding point A, fuel is supplied at 10 cc/min, lm
It is shown that the gas temperature before the DPF reaches 600° C. after 1 n has elapsed, but increases to a maximum of 780° C. as time passes.
第４図は本発明の第２実施例でＤＰＦ後流に切換バルブ
１１を設はバーナ運転時高温のバーナ排ガスを排気管１
２に流しこの排気管長を伸ばし排ガスの冷却をねらった
ものである又排気管１２に排ガス冷却器１０を組合せた
ものも考えられる。FIG. 4 shows a second embodiment of the present invention, in which a switching valve 11 is installed downstream of the DPF to direct high-temperature burner exhaust gas to the exhaust pipe 1 during burner operation.
2, the length of this exhaust pipe is extended to cool the exhaust gas.It is also conceivable that the exhaust pipe 12 is combined with an exhaust gas cooler 10.
第５図は本発明の第３実施例でＤＰＦ後流に切換バルブ
１１を設け、バーナ運転時高温のバーナ排ガス冷却装置
１０をＣ回路に配置したものである。FIG. 5 shows a third embodiment of the present invention in which a switching valve 11 is provided downstream of the DPF, and a burner exhaust gas cooling device 10, which is at a high temperature during burner operation, is arranged in the C circuit.
なお第２．第３実施例の作用効果は第１実施例と同様で
ある。In addition, the second. The effects of the third embodiment are similar to those of the first embodiment.
前述のとおり、本発明の排ガス浄化装置は、ＤＰＦをマ
フラーの最下流におき前記フィルタとマフラーの間にバ
ーナおよび排気切換バルブを配置し、前記フィルタ再生
時はエンジンの排ガスをバイパスパイプに流すようにし
たのでＤＰＦの捕集′効率を向上させるとともにマフラ
ーの使用数も減少させることができる。As mentioned above, in the exhaust gas purification device of the present invention, the DPF is placed at the most downstream position of the muffler, a burner and an exhaust switching valve are arranged between the filter and the muffler, and when the filter is regenerated, the engine exhaust gas is directed to the bypass pipe. As a result, the collection efficiency of the DPF can be improved and the number of mufflers used can be reduced.
はバーナ位置とＤＰＦ前ガス温の関係を示す線区、第３
図はバーナ位置とＤＰＦ前ガス温が６ｏｏ℃になる時間
を示す線図、第４図は第１実施例のバーナ運転時バーナ
排ガスを長い排気管に流し冷却するようにした第２実施
例の構成図。第５図は同・ぐ−す排気を排気冷却器で冷
却するようにした第３実施例の構成図である。is the line section 3 that shows the relationship between the burner position and the gas temperature before the DPF.
The figure is a diagram showing the burner position and the time required for the gas temperature before the DPF to reach 60°C. Figure 4 is a graph showing the burner exhaust gas of the first embodiment in which the burner exhaust gas is cooled by flowing through a long exhaust pipe during burner operation. Diagram. FIG. 5 is a block diagram of a third embodiment in which the gas exhaust gas is cooled by an exhaust cooler.
４．５・・・マフラー、６・・・バーナ、７・・・ディ
ーゼルツクティキュレートフィルタ（ＤＰＦ）、８・・
・排気第２図
第３図
ＤＰＦ入［７９Ｊｌ” ６００°Ｃ１１叶１丹）Ｅｌｊ
１％ｒｌ ｔ （ｍｉｎ）第４図
第５図4.5...Muffler, 6...Burner, 7...Diesel filter (DPF), 8...
・Exhaust Figure 2 Figure 3 DPF included [79Jl” 600°C11 Kano 1tan) Elj
1% rl t (min) Fig. 4 Fig. 5
Claims (1)
下流におき前記フィルタとマフラーの間にバーナおよび
排気切換バルブを配置し、前記フィルタ再生時にはエン
ジンの排ガスをバイハス・ｅイブに流すようにした排ガ
ス浄化装置。An exhaust gas purification device in which a diesel exhaust filter is placed at the most downstream position of a muffler, a burner and an exhaust switching valve are arranged between the filter and the muffler, and when the filter is regenerated, engine exhaust gas is caused to flow to a bypass/eve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58018024A JPS59145318A (en) | 1983-02-08 | 1983-02-08 | Exhaust gas purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58018024A JPS59145318A (en) | 1983-02-08 | 1983-02-08 | Exhaust gas purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59145318A true JPS59145318A (en) | 1984-08-20 |
Family
ID=11960094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58018024A Pending JPS59145318A (en) | 1983-02-08 | 1983-02-08 | Exhaust gas purifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59145318A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6550718B2 (en) * | 2001-07-13 | 2003-04-22 | Toyota Jidosha Kabushiki Kaisha | Aircraft engine |
| CN102859138A (en) * | 2010-04-26 | 2013-01-02 | 丰田自动车株式会社 | Internal combustion engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4710573U (en) * | 1971-03-03 | 1972-10-07 |
-
1983
- 1983-02-08 JP JP58018024A patent/JPS59145318A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4710573U (en) * | 1971-03-03 | 1972-10-07 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6550718B2 (en) * | 2001-07-13 | 2003-04-22 | Toyota Jidosha Kabushiki Kaisha | Aircraft engine |
| CN102859138A (en) * | 2010-04-26 | 2013-01-02 | 丰田自动车株式会社 | Internal combustion engine |
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