JP2002129941A - Exhaust particulate filter device of diesel engine - Google Patents
Exhaust particulate filter device of diesel engineInfo
- Publication number
- JP2002129941A JP2002129941A JP2000319291A JP2000319291A JP2002129941A JP 2002129941 A JP2002129941 A JP 2002129941A JP 2000319291 A JP2000319291 A JP 2000319291A JP 2000319291 A JP2000319291 A JP 2000319291A JP 2002129941 A JP2002129941 A JP 2002129941A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- particulate filter
- filter device
- diesel engine
- exhaust particulate
- 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
Landscapes
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は排気微粒子フイルタ
の目詰まり検出に圧力センサを用いたデイーゼル機関の
排気微粒子フイルタ装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust particulate filter device for a diesel engine using a pressure sensor for detecting clogging of the exhaust particulate filter.
【0002】[0002]
【従来の技術】従来のデイーゼル機関の排気微粒子フイ
ルタ装置では、フイルタの目詰まり具合を検知するため
に、フイルタの前後部に圧力センサを配設し、フイルタ
前後の圧力差、圧力比などから判断している。2. Description of the Related Art In a conventional exhaust particulate filter device of a diesel engine, pressure sensors are disposed at the front and rear portions of the filter to detect the degree of clogging of the filter, and judgment is made based on a pressure difference and a pressure ratio between the front and rear of the filter. are doing.
【0003】上述のようなデイーゼル機関の排気微粒子
フイルタ装置では、排気中の水蒸気が圧力センサの内部
で結露し、結露に排気中のNOx、SOxが溶け込み、
圧力センサが腐食し、破損する恐れがあつた。[0003] In the exhaust particulate filter device of the diesel engine as described above, water vapor in the exhaust condenses inside the pressure sensor, and NOx and SOx in the exhaust dissolve into the dew.
The pressure sensor could be corroded and damaged.
【0004】[0004]
【発明が解決しようとする課題】本発明の課題は上述の
問題に鑑み、圧力センサが排気中の水蒸気により腐食
し、破損するのを防止するようにしたデイーゼル機関の
排気微粒子フイルタ装置を提供することにある。SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide an exhaust particulate filter device for a diesel engine in which a pressure sensor is prevented from being corroded and damaged by water vapor in exhaust gas. It is in.
【0005】[0005]
【課題を解決するための手段】上記課題を解決するため
に、本発明の構成は排気微粒子フイルタの目詰まり検出
に圧力センサを用いるデイーゼル機関の排気微粒子フイ
ルタ装置において、前記圧力センサの上流側に圧力に応
動しかつ前記圧力センサと排気とを分離するベローズま
たはダイアフラムを配設したことを特徴とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a configuration of the present invention is an exhaust particulate filter device of a diesel engine using a pressure sensor for detecting clogging of the exhaust particulate filter. A bellows or a diaphragm responsive to the pressure and separating the pressure sensor from the exhaust gas is provided.
【0006】[0006]
【発明の実施の形態】本発明では圧力センサが配設され
る室を、ステンレス鋼板またはゴム、樹脂からなるベロ
ーズまたはダイアフラムにより区画し、室へ排気圧のみ
を伝達し、排気中の水蒸気の浸入を遮断する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a chamber in which a pressure sensor is disposed is partitioned by a bellows or a diaphragm made of stainless steel plate, rubber, or resin, and only the exhaust pressure is transmitted to the chamber, so that water vapor in the exhaust gas enters Cut off.
【0007】[0007]
【実施例】以下、図面を参照して、本発明によるデイー
ゼル機関の排気微粒子フイルタ装置の実施例を説明す
る。図1に示すように、本発明によるデイーゼル機関の
排気微粒子を捕集するためのフイルタ装置1a,1b
は、機関の排気管2と排気管3a,3bとの間に組み込
まれた1対の筒状のケース4a,4bから構成される。
ケース4a,4bは直線上に延びるように配置され、ケ
ース4a,4bの中央部に弁ケース部5が、ケース4
a,4bよりも機関から遠い方(排気下流)にリアケー
ス部42a,42bがそれぞれ配設されている。弁ケー
ス部5には、ケース4a,4bの入口44a,44bの
開閉を切り換えるための切換弁8が収容される。弁ケー
ス部5には排気が流入する入口9が形成されている。ま
た、ケース4a,4bの中部には排気を濾過するフイル
タ12a,12bが設置される。したがつて、入口9か
ら弁ケース部5の内部へ流入した排気は入口44a,4
4bからケース4a,4bのフイルタ12a,12bを
通過し、リアケース部42a,42bに導入される。切
換弁8はピン52によりレバー51の先端に連結され、
レバー51は例えば電動機の主軸50に結合される。切
換弁8は電子制御装置10の指令によつて切り換えられ
る。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an exhaust particulate filter device for a diesel engine according to the present invention; As shown in FIG. 1, filter devices 1a and 1b for collecting exhaust particulates of a diesel engine according to the present invention.
Is comprised of a pair of cylindrical cases 4a, 4b incorporated between the exhaust pipe 2 of the engine and the exhaust pipes 3a, 3b.
The cases 4a and 4b are arranged so as to extend on a straight line, and the valve case 5 is provided at the center of the cases 4a and 4b.
Rear case portions 42a and 42b are respectively disposed farther from the engine than (a and 4b) (downstream of the exhaust gas). The valve case 5 accommodates a switching valve 8 for switching the opening and closing of the inlets 44a and 44b of the cases 4a and 4b. An inlet 9 into which exhaust gas flows is formed in the valve case portion 5. Filters 12a and 12b for filtering exhaust gas are installed in the middle of the cases 4a and 4b. Accordingly, the exhaust gas flowing from the inlet 9 into the inside of the valve case part 5 is removed from the inlets 44a, 4a.
From 4b, it passes through filters 12a and 12b of cases 4a and 4b, and is introduced into rear case parts 42a and 42b. The switching valve 8 is connected to the tip of the lever 51 by a pin 52,
The lever 51 is connected to, for example, the main shaft 50 of the electric motor. The switching valve 8 is switched according to a command from the electronic control unit 10.
【0008】今、切換弁8はケース4aの入口44aを
開放し、ケース4aの内部のフイルタ12aへ排気を導
き、フイルタ12aで排気中の排気微粒子を捕集する。
フイルタ12aで排気微粒子を捕集されて浄化された排
気は排気管3aへ流出する。同時に、切換弁8はケース
4bの入口44bを閉鎖し、ケース4bの内部のフイル
タ12bを再生する。切換弁8はケース4a,4bの入
口44a,44bを交互に開閉する。Now, the switching valve 8 opens the inlet 44a of the case 4a, guides the exhaust to the filter 12a inside the case 4a, and collects the exhaust fine particles in the exhaust by the filter 12a.
Exhaust gas that has been collected by the filter 12a and purified is discharged to the exhaust pipe 3a. At the same time, the switching valve 8 closes the inlet 44b of the case 4b and regenerates the filter 12b inside the case 4b. The switching valve 8 opens and closes the inlets 44a and 44b of the cases 4a and 4b alternately.
【0009】各フイルタ12a,12bは中空状の円筒
体に形成され、入口44a,44bの端壁部が遮蔽板1
3a,13bにより遮蔽されている。ケース4a,4b
とフイルタ12a,12bの外周面との間に排気の流入
通路15a,15bが形成されている。各フイルタ12
a,12bの内空部が浄化された排気の流出通路17
a,17bを形成する。各フイルタ12a,12bの出
口端壁部は内空部の流出通路17a,17bを除いて遮
蔽板14a,14bにより遮蔽されている。流出通路1
7a,17bは出口21a,21bを経てリアケース部
42a,42bに一旦流入し、排気管3a,3bに連な
る。Each of the filters 12a and 12b is formed in a hollow cylindrical body, and the end walls of the inlets 44a and 44b are covered with the shielding plate 1.
It is shielded by 3a and 13b. Cases 4a, 4b
Exhaust inflow passages 15a, 15b are formed between the filter and the outer peripheral surfaces of the filters 12a, 12b. Each filter 12
outflow passage 17 of the exhaust gas whose inner space portions of the a and 12b are purified
a and 17b are formed. The outlet end walls of the filters 12a, 12b are shielded by shielding plates 14a, 14b except for the outflow passages 17a, 17b in the inner space. Outflow passage 1
7a, 17b once flow into the rear case portions 42a, 42b via the outlets 21a, 21b, and continue to the exhaust pipes 3a, 3b.
【0010】各フイルタ12a,12bには捕集された
排気微粒子を加熱焼却するための加熱手段としてのヒー
タ23a,23bが設けられている。ヒータ23a,2
3bはフイルタ素子を挟持するフイルタ12a,12b
の内周面と外周面に重ね合された金網のうち、少なくと
も何れか一方の金網(図示の実施例では外周面の金網)
から構成され、ヒータ23a,23bの加熱制御は電子
制御装置10の指令によつて行われるように構成され
る。The filters 12a and 12b are provided with heaters 23a and 23b as heating means for heating and burning the collected exhaust fine particles. Heaters 23a, 2
3b denotes filters 12a and 12b for holding the filter element.
At least one of the wire meshes superposed on the inner circumferential surface and the outer circumferential surface (the wire mesh on the outer circumferential surface in the illustrated embodiment).
, And the heating control of the heaters 23a and 23b is performed according to a command from the electronic control unit 10.
【0011】フイルタ12a,12bに捕集された排気
微粒子の捕集量は、例えばフイルタ12a,12bへ流
入する排気の入口44a,44bにおける排気圧によ
り、すなわち弁ケース部5に接続した圧力センサ26a
とリアケース部42a,42bに接続した圧力センサ2
6b,26cとの圧力の比により検出される。The amount of the exhaust fine particles collected by the filters 12a and 12b is determined, for example, by the exhaust pressure at the inlets 44a and 44b of the exhaust gas flowing into the filters 12a and 12b, that is, the pressure sensor 26a
And pressure sensor 2 connected to rear case portions 42a and 42b
6b and 26c.
【0012】弁ケース部5に排気圧に応動する例えばス
テンレス鋼板またはゴム、樹脂からなるベローズまたは
ダイアフラム27aを収納したケース28aが通路25
aにより接続される。同様に、リアケース部42a,4
2bにもベローズ27b,27cを収納したケース28
b,28cが通路25b,25cにより接続される。ベ
ローズまたはダイアフラム27a,27b,27cは腐
食性ガス成分を含有する排気と圧力センサ26a,26
b,26cとを完全に分離し、排気圧のみを圧力センサ
26a,26b,26cへ伝達するものである。したが
つて、圧力センサ26a,26b,26cは排気に直接
触れることがないので、排気中の水蒸気が結露し、結露
に排気中のNOxやSOxが溶け込むことにより生じる
圧力センサ26a,26b,26cの腐食と腐食により
もたらされる破損とが防止される。A case 28a accommodating a bellows or a diaphragm 27a made of, for example, a stainless steel plate or rubber or resin responsive to the exhaust pressure in the valve case portion 5 is provided in the passage 25.
a. Similarly, the rear case portions 42a, 4
Case 28 containing bellows 27b and 27c also in 2b
b and 28c are connected by passages 25b and 25c. Bellows or diaphragms 27a, 27b, 27c are provided with exhaust containing corrosive gas components and pressure sensors 26a, 26b.
b, 26c are completely separated from each other, and only the exhaust pressure is transmitted to the pressure sensors 26a, 26b, 26c. Therefore, since the pressure sensors 26a, 26b, and 26c do not directly contact the exhaust gas, the water vapor in the exhaust gas is condensed, and the pressure sensors 26a, 26b, and 26c generated by dissolving NOx and SOx in the exhaust gas into the dew condensation. Corrosion and the damage caused by corrosion are prevented.
【0013】[0013]
【発明の効果】本発明は上述のように、排気フイルタの
目詰まり検出に圧力センサを用いる排気微粒子フイルタ
装置において、前記圧力センサの上流側に、圧力に応動
しかつ圧力センサと排気とを分離するベローズを配設し
たので、圧力センサが排気に直接触れることがない。し
たがつて、排気中の水蒸気が結露し、結露にNOxやS
Oxが溶け込むことにより生じる腐食と腐食によりもた
らされる破損とが防止され、圧力センサの耐久性、信頼
性が著しく向上する。As described above, according to the present invention, in an exhaust particulate filter device using a pressure sensor for detecting clogging of an exhaust filter, the pressure sensor and the exhaust are separated upstream of the pressure sensor in response to pressure. Since the bellows are provided, the pressure sensor does not directly contact the exhaust gas. Therefore, water vapor in the exhaust gas is condensed, and NOx or S
Corrosion caused by dissolution of Ox and damage caused by the corrosion are prevented, and the durability and reliability of the pressure sensor are significantly improved.
【図1】本発明に係るデイーゼル機関の排気微粒子フイ
ルタ装置の側面断面図である。FIG. 1 is a side sectional view of an exhaust particulate filter device for a diesel engine according to the present invention.
1a,1b:排気微粒子フイルタ装置 2:排気管 3
a,3b:排気管 4a,4b:ケース 5:弁ケース
部 8:切換弁 9:入口 10:電子制御装置 12a,12b:フイルタ 13a,13b:遮蔽板
14a,14b:遮蔽板 15a,15b:流入通路
17a,17b:流出通路 21a,21b:出口通路
23a,23b:ヒータ 25a,25b,25c:
通路 26a,26b,26c:圧力センサ 27a,
27b,27c:ベローズ 28a,28b,28c:
ケース 42a,42b:リヤケース部 44a,44
b:入口 50:主軸 51:レバー 52:ピン1a, 1b: Exhaust particulate filter device 2: Exhaust pipe 3
a, 3b: Exhaust pipes 4a, 4b: Case 5: Valve case portion 8: Switching valve 9: Inlet 10: Electronic control device 12a, 12b: Filter 13a, 13b: Shielding plate
14a, 14b: shielding plate 15a, 15b: inflow passage
17a, 17b: Outflow passages 21a, 21b: Outlet passages 23a, 23b: Heaters 25a, 25b, 25c:
Passages 26a, 26b, 26c: pressure sensors 27a,
27b, 27c: bellows 28a, 28b, 28c:
Cases 42a, 42b: Rear case portions 44a, 44
b: Inlet 50: Main shaft 51: Lever 52: Pin
Claims (2)
センサを用いるデイーゼル機関の排気微粒子フイルタ装
置において、前記圧力センサの上流側に圧力に応動しか
つ前記圧力センサと排気とを分離するベローズまたはダ
イアフラムを配設したことを特徴とするデイーゼル機関
の排気微粒子フイルタ装置。An exhaust particulate filter device for a diesel engine using a pressure sensor for detecting clogging of an exhaust particulate filter, wherein a bellows or a diaphragm responsive to pressure upstream of the pressure sensor and separating the pressure sensor from exhaust gas. An exhaust particulate filter device for a diesel engine, comprising:
レス鋼板またはゴム、樹脂からなる、請求項1に記載の
デイーゼル機関の排気微粒子フイルタ装置。2. The exhaust particulate filter device for a diesel engine according to claim 1, wherein said bellows or diaphragm is made of stainless steel plate, rubber, or resin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000319291A JP2002129941A (en) | 2000-10-19 | 2000-10-19 | Exhaust particulate filter device of diesel engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000319291A JP2002129941A (en) | 2000-10-19 | 2000-10-19 | Exhaust particulate filter device of diesel engine |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2002129941A true JP2002129941A (en) | 2002-05-09 |
Family
ID=18797778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000319291A Pending JP2002129941A (en) | 2000-10-19 | 2000-10-19 | Exhaust particulate filter device of diesel engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2002129941A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110232264A1 (en) * | 2010-03-29 | 2011-09-29 | Lucht Erich A | Filter arrangement for exhaust aftertreatment system |
JP2022000647A (en) * | 2015-09-21 | 2022-01-04 | オプセンス ソリューションズ インコーポレイテッド | Optical pressure sensor having reduced mechanical stress |
-
2000
- 2000-10-19 JP JP2000319291A patent/JP2002129941A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110232264A1 (en) * | 2010-03-29 | 2011-09-29 | Lucht Erich A | Filter arrangement for exhaust aftertreatment system |
US8534055B2 (en) * | 2010-03-29 | 2013-09-17 | Thermo King Corporation | Filter arrangement for exhaust aftertreatment system |
JP2022000647A (en) * | 2015-09-21 | 2022-01-04 | オプセンス ソリューションズ インコーポレイテッド | Optical pressure sensor having reduced mechanical stress |
JP7297833B2 (en) | 2015-09-21 | 2023-06-26 | オプセンス ソリューションズ インコーポレイテッド | Optical pressure sensor with reduced mechanical stress |
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