JPS5979024A - Exhaust-gas purifying apparatus for diesel engine - Google Patents
Exhaust-gas purifying apparatus for diesel engineInfo
- Publication number
- JPS5979024A JPS5979024A JP57189728A JP18972882A JPS5979024A JP S5979024 A JPS5979024 A JP S5979024A JP 57189728 A JP57189728 A JP 57189728A JP 18972882 A JP18972882 A JP 18972882A JP S5979024 A JPS5979024 A JP S5979024A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- cylinders
- filter member
- exhaust
- 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.)
- Granted
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
-
- 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
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/02—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by cutting out a part of engine cylinders
-
- 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
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
Abstract
Description
【発明の詳細な説明】
本発明は、ディーゼルエンジンにおける排気ガス浄化装
置の改良番こ関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved exhaust gas purification device for a diesel engine.
従来より、ディーゼルエンジンにおいて１例えば特開昭
ｊ乙−／、２グ乙／♂号公報に示されるように、排気ガ
ス中のカーボン粒子等の微粒子成分の大気放出を阻止す
るために、この微粒子成分を捕集するフィルタ一部材を
排気通路に配設するとともに、該フィルタ一部材の上流
側にヒータを設け、さらに、燃料噴射ポンプによる燃料
噴射時期を遅らせて排気温度を上昇し、上記フィルタ一
部材を予熱してからフィルタ一部材に捕集した微粒子成
分をヒータによって燃焼除去するようにしたディーゼル
エンジンの排気ガス浄化装置が提案されているが、ヒー
タの使用は燃費性を低下する不具合を有する。Conventionally, in diesel engines, in order to prevent particulate components such as carbon particles in exhaust gas from being released into the atmosphere, as shown in Japanese Patent Application Laid-Open Nos. 1 and 2, A filter member for collecting components is disposed in the exhaust passage, and a heater is provided upstream of the filter member, and further, the timing of fuel injection by the fuel injection pump is delayed to increase the exhaust temperature. A diesel engine exhaust gas purification device has been proposed in which the parts are preheated and then the particulate components collected in the filter part are burned off using a heater, but the use of a heater has the disadvantage of reducing fuel efficiency. .
本発明はかかる点に鑑み、排気ガス中の微粒子成分を捕
集するフィルタ一部材を排気通路に設けたものにおいて
、特定気筒の燃料噴射を増量する一方残気筒の燃料噴射
を停止する減筒運転機構と。In view of the above, the present invention provides a system in which a filter member for collecting particulate components in exhaust gas is provided in the exhaust passage, and the present invention provides reduced-cylinder operation in which the amount of fuel injection in a specific cylinder is increased while fuel injection in the remaining cylinders is stopped. With the mechanism.
残気筒からの排気ガスのフィルタ一部材への導入を遮断
する遮断装置と、フィルタ一部材の目詰り時もしくは所
定間隔ごとに、上記減筒運転機構および遮断装置を作動
させ減筒運転を行うとともに残気筒の排気ガスのフィル
タ一部材への導入を阻止する制御装置とを設けてなるデ
ィーゼルエンジンの排気ガス浄化装置を提供し、ヒータ
等の熱源を有することな（フィルタ一部材の温度を有効
に上昇して？１耐実にフィルタ一部材の目詰りを解消せ
んとするものである。A shutoff device that shuts off the introduction of exhaust gas from the remaining cylinders to the filter member, and when the filter member is clogged or at predetermined intervals, the cylinder reduction operation mechanism and the shutoff device are activated to perform cylinder reduction operation. Provided is an exhaust gas purification device for a diesel engine that is equipped with a control device that prevents exhaust gas from remaining cylinders from being introduced into a filter member, and does not require a heat source such as a heater (to effectively control the temperature of the filter member). The purpose is to eliminate clogging of the filter member in a 1-hour period.
以下、本発明の実施例を図面に沿って説明する。Embodiments of the present invention will be described below with reference to the drawings.
〈実施例／〉
第１図において、１は多気筒（グ気筒）のディーゼルエ
ンジン、２は該エンジン１の各気筒１Ａ〜１Ｄからの排
気ガスを導出する排気通路である。<Embodiment/> In FIG. 1, 1 is a multi-cylinder (G cylinder) diesel engine, and 2 is an exhaust passage for leading out exhaust gas from each cylinder 1A to 1D of the engine 1.
」二記排気通路２には、排気ガス中のカーボン粒子等の
微粒子成分を捕集するフィルタ一部材４に酸化触媒がコ
ーティングされてなる反応器３が配設されている。2. A reactor 3 is disposed in the exhaust passage 2 and is formed by coating a filter member 4 with an oxidation catalyst to collect particulate components such as carbon particles in the exhaust gas.
上記反応器６めフィルタ一部材４は、セラミック等の多
孔質材料によりハニカム状に形成され、排気の流れに沿
う各細孔は一つおきにその端部が閉塞されており、一端
部の開口細孔がら流入した排気ガスは通気性の多孔質隔
壁を通って他端部の開口細孔から流出するものであって
、隔壁通過時に排気ガス中のカーボン粒子等の微粒子を
捕集するよう構成され、このフィルタ一部材４の表面に
は貴金属あるいは卑金属による酸化触媒がコーティング
されている。The reactor 6 filter member 4 is formed in a honeycomb shape from a porous material such as ceramic, and every other pore along the flow of exhaust gas is closed at one end, and one end is opened. The exhaust gas that has flowed in through the pores passes through the permeable porous partition wall and flows out from the open pores at the other end, and is configured to collect fine particles such as carbon particles in the exhaust gas as it passes through the partition wall. The surface of the filter member 4 is coated with an oxidation catalyst made of noble metal or base metal.
上記排気通路２は、反応器６の上流側部分が、特定気筒
ＩＢ、ＩＣ（第２，３気筒）の排気ガスを常時フィルタ
一部材４に導（第１排気通路２ａと、残気筒ｌＡｌ１’
Ｄ（第１．ダ気筒）の排気ガスをフィルタ一部材４番こ
導（第２排気通路２ｂとにより構成され、第１および第
２排気通路２ ａ ＋２ｂは反応器乙の上流で合流して
いる。In the exhaust passage 2, the upstream part of the reactor 6 constantly guides the exhaust gas of the specific cylinders IB and IC (second and third cylinders) to the filter member 4 (the first exhaust passage 2a and the remaining cylinder lAl1'
Exhaust gas from D (first cylinder) is guided through filter member No. 4 (consisting of second exhaust passage 2b), and the first and second exhaust passages 2a + 2b meet upstream of reactor B. There is.
また、５は上記残気筒ＩＡＩ ＩＤからの排気ガスのフ
ィルタ一部材４への導入を遮断する遮断装置で、この遮
断装置５は、第２排気通路２ｂから分岐し前記フィルタ
一部材４をバイパスして形成されたバイパス通路６を有
し、この第２排気通路２ｂとバイパス通路６との分岐部
には、残気筒１Ａ、１Ｄからの排気ガスを該バイパス通
路乙に導入するかもしくは反応器乙に導入するかを切換
える切換弁７が配設され、該切換弁７はアクチュエータ
８によって操作され、アクチュエータ８の作動時にバイ
パス通路６を開いて、残気筒１Ａ、１Ｄからの排気ガス
のフィルタ一部材４への導入を阻止するように構成され
ている。Further, reference numeral 5 denotes a shutoff device that shuts off the exhaust gas from the remaining cylinder IAI ID from being introduced into the filter member 4. This shutoff device 5 branches from the second exhaust passage 2b and bypasses the filter member 4. At the branch point between the second exhaust passage 2b and the bypass passage 6, the exhaust gas from the remaining cylinders 1A and 1D is introduced into the bypass passage B or the reactor A switching valve 7 is provided to switch between introducing the exhaust gas into the remaining cylinders 1A and 1D.The switching valve 7 is operated by an actuator 8, and when the actuator 8 is operated, the bypass passage 6 is opened and the filter member for the exhaust gas from the remaining cylinders 1A and 1D is opened. 4.
一方、９は、各気筒１Ａ〜１Ｄに配設された燃料噴射ノ
ズル１０ａ〜１０ｄに燃料通路１１ａ〜１１ｄを介して
燃料を所定のタイミングで供給する燃料噴射装置で、こ
の燃料噴射装置９は特定気筒ＩＢ、ＩＣの燃料噴射を増
量する一方、残気筒ＩＡ、１１）の燃料噴射を停止する
減筒運転機構を有している。On the other hand, 9 is a fuel injection device that supplies fuel at a predetermined timing to fuel injection nozzles 10a to 10d disposed in each cylinder 1A to 1D via fuel passages 11a to 11d. It has a cylinder reduction operation mechanism that increases the amount of fuel injected into the cylinders IB and IC, while stopping the fuel injection in the remaining cylinders IA and 11).
すなわち、上記燃料噴射装置９は、特定気筒１Ｂ、ＩＣ
に燃料を供給する第１燃料噴射ポンプ１２Ａと、残気筒
ｌＡ、’ＩＤに燃料を供給する第１燃料噴射ポンプ１２
Ａとを備え、減筒運転時には第１燃判噴射ポンプ１２Ａ
からの供給燃料を増量する一方、第２燃料噴射ポンプ１
２Ｂからの燃料供給を停止するように作動するものであ
る。That is, the fuel injection device 9 has a specific cylinder 1B, an IC
and the first fuel injection pump 12 that supplies fuel to the remaining cylinders lA and 'ID.
A and a first fuel injection pump 12A during cylinder reduction operation.
While increasing the amount of fuel supplied from the second fuel injection pump 1
It operates to stop the fuel supply from 2B.
さらに、１６は、遮断装置５の切換弁７および燃料噴射
装置９の減筒運転機構の作動を制御する制御装置であり
、該制御装置１３には、入力信号として、フィルタ一部
材４より上流の排気通路２の排気圧力を検出する排圧セ
ンサー１４の検出信号、およびアクセル操作量を検出す
る負荷センサー１５からの検出信号が入力され、上記検
出信号に応じて制御を行うものである。Furthermore, 16 is a control device that controls the operation of the switching valve 7 of the shutoff device 5 and the cylinder reduction operation mechanism of the fuel injection device 9. A detection signal from an exhaust pressure sensor 14 that detects the exhaust pressure in the exhaust passage 2 and a detection signal from a load sensor 15 that detects the amount of accelerator operation are input, and control is performed in accordance with the detection signals.
上記制御装置１３は、排圧センサー１４の検出信号を入
力し、排圧が所定値より高くなった状態を目詰り発生時
と判断し１反応器乙において微粒子成分の燃焼を行うべ
くフィルタ一部材４の温度を上昇させるものである。The control device 13 inputs the detection signal of the exhaust pressure sensor 14, determines that a state in which the exhaust pressure has become higher than a predetermined value is the occurrence of clogging, and installs a filter member in order to burn particulate components in the first reactor B. This increases the temperature of step 4.
上記制御装置１６は、目詰り時に、切換弁７のアクチュ
エータ８を作動させてバイパス通路６を開いて残気筒１
Ａ、ｌＤの排気ガスをバイパス通路乙に導き、フィルタ
一部材４には第／排気通路２ａの排気ガスのみを導入す
るとともに、燃料噴射装置９に対し減筒運転を行うよう
に制御信号を出力する。The control device 16 operates the actuator 8 of the switching valve 7 to open the bypass passage 6 when the remaining cylinder 1 is clogged.
Guides the exhaust gases A and 1D to the bypass passage B, introduces only the exhaust gas from the first/exhaust passage 2a into the filter member 4, and outputs a control signal to the fuel injection device 9 to perform cylinder reduction operation. do.
また、制御装置１６は、負荷センサー１５の検出信号を
受け、低負荷時に上記燃料噴射装置９に対し減筒運転を
行うように制御信号を出力するよう構成されている。Further, the control device 16 is configured to receive a detection signal from the load sensor 15 and output a control signal to the fuel injection device 9 to perform cylinder reduction operation when the load is low.
上記実施例の作用を説明すれば、反応器６のフィルタ一
部材４の目詰り発生時においては、この目詰りを排圧セ
ンサー１４により検出した制御装置１３は、（７Ｉ換弁
７の作動により特定気筒１Ｂ。To explain the operation of the above embodiment, when the filter member 4 of the reactor 6 becomes clogged, the control device 13 detects this clogging with the exhaust pressure sensor 14 and specifies the Cylinder 1B.
１Ｃの排気ガスのみをフィルタ一部材４に導くとともに
、燃料噴射袋＠９の減筒運転機構の作動によりこの特定
気筒１Ｂ、１Ｇに対する燃料噴射を増量し必要出力の確
保を図る一方、残気筒１Ａ。Only the exhaust gas of 1C is guided to the filter member 4, and the fuel injection amount to the specific cylinders 1B and 1G is increased by operating the cylinder reduction operation mechanism of the fuel injection bag @9 to ensure the required output, while the remaining cylinder 1A .
１Ｄの燃料噴射を停止する。その結果、特定気筒１Ｂ、
ｊＣでは発熱量が増大し排気ガス温度が上昇する。Stop 1D fuel injection. As a result, specific cylinder 1B,
At jC, the amount of heat generated increases and the exhaust gas temperature rises.
よって、反応器６においては、排気温度の上昇によりフ
ィルタ一部材４が昇温し、該フィルタ一部材４に捕集し
ている微粒子成分の燃焼除去を行う。また、未燃焼成分
との接触により触媒の酸化反応が高まり、その反応熱に
よってさらにフィルタ一部材４の温度が上昇し、確実に
微粒子成分を焼失する。Therefore, in the reactor 6, the temperature of the filter member 4 rises due to the rise in exhaust gas temperature, and the particulate components collected in the filter member 4 are burned and removed. Moreover, the oxidation reaction of the catalyst increases due to contact with unburned components, and the temperature of the filter member 4 further increases due to the reaction heat, thereby ensuring that the particulate components are burned out.
その際、残気筒［Ａ、１Ｄから排出される空気をバイパ
スしていることにより、フィルタ一部材４がそれによっ
て冷却されることがなく、フィルタ一部材４の温度上昇
が有効に行われる。At this time, by bypassing the air discharged from the remaining cylinders [A, 1D, the filter member 4 is not cooled by it, and the temperature of the filter member 4 is effectively increased.
このようにしてフィルタ一部材４の目語りがな（なり、
排圧が低下すると、燃料噴射装置９の作動による減筒運
転を停止し全筒運転を行う一方、切換弁７によりバイパ
ス通路６を閉じて残気筒１Ａ、 １Ｄの排気ガスをフィ
ルタ一部材４に導入し、再び、微粒子成分の捕集を行い
、目詰り状態となったら前記と同様に目詰り解消を行う
。In this way, the reading of the filter member 4 becomes...
When the exhaust pressure decreases, the cylinder reduction operation by the operation of the fuel injection device 9 is stopped and full cylinder operation is performed, while the bypass passage 6 is closed by the switching valve 7 and the exhaust gas from the remaining cylinders 1A and 1D is transferred to the filter member 4. The particulate components are collected again, and when clogging occurs, the clogging is removed in the same manner as described above.
また、低負荷時には、制御装置１６は負荷センサー１５
からの検出信号に基づき燃料噴射装置９の減筒運転機構
を作動させ、特定気筒１Ｂ、１Ｃの燃料噴射を増量する
一方、残気筒ＩＡ、ＩＤの燃料噴射を停止して減筒運転
を行い、白煙の排出抑制および燃費性の改善を行ってい
る。この場合も、切換弁７を作動させてバイパス通路６
を開き。In addition, when the load is low, the control device 16 controls the load sensor 15
Activates the cylinder reduction operation mechanism of the fuel injection device 9 based on the detection signal from the fuel injection device 9 to increase the amount of fuel injection in the specific cylinders 1B and 1C, while stopping the fuel injection in the remaining cylinders IA and ID to perform cylinder reduction operation, It suppresses white smoke emissions and improves fuel efficiency. In this case as well, the switching valve 7 is operated and the bypass passage 6 is
Open.
フィルタ一部材４の温度低下を防止する。Prevents the temperature of the filter member 4 from decreasing.
〈実施例２〉
本例は第２図に示し、１６は、シリンダヘッド１７、シ
リンダブロック１８、ピストン１９等よりなるディーゼ
ルエンジン、２０は該エンジン１６の各気筒（図示の場
合は残気筒）の燃焼室２１がらの排気ガスを排気弁２２
を介して導出する排気通路であり、該排気通路２０には
前例と同様のフィルタ一部材４を備えた反応器３が介装
され、排気ガス中の微粒子成分の捕集を行う。<Embodiment 2> This example is shown in FIG. 2, where 16 is a diesel engine consisting of a cylinder head 17, a cylinder block 18, a piston 19, etc., and 20 is a cylinder of each cylinder (remaining cylinders in the case shown) of the engine 16. The exhaust gas from the combustion chamber 21 is removed from the exhaust valve 22.
The exhaust passage 20 is equipped with a reactor 3 equipped with a filter member 4 similar to that of the previous example, and collects particulate components in the exhaust gas.
また、２６は減筒運転機構を有する燃料噴射装置で、特
定気筒に対する燃料噴射を増量するべく制御袋＠２４か
らの制御信号を受けて噴射量を調整する燃料噴射ポンプ
２５と、残気筒に対する燃料噴射を停止するべく制御装
置２４がらの駆動信号を受けて燃料噴射を停止するノズ
ルセレクタ２６を有する燃料噴射ノズル２７とを備えて
なり、この燃料噴射ノズル２７のノズルセレクタ２６は
、制御装置２４からの駆動信号を受けた際に燃料噴射ポ
ンプ２５からの高圧通路２８とリタン通路２９とを連通
して噴射不能とするよう設けられている。Further, 26 is a fuel injection device having a cylinder reduction operation mechanism, which includes a fuel injection pump 25 that adjusts the injection amount in response to a control signal from the control bag @ 24 to increase the amount of fuel injected to a specific cylinder, and a fuel injection pump 25 that adjusts the injection amount in response to a control signal from the control bag @ 24 to increase the amount of fuel injected to a specific cylinder. The fuel injection nozzle 27 has a nozzle selector 26 that receives a drive signal from the control device 24 to stop fuel injection. The high pressure passage 28 from the fuel injection pump 25 and the return passage 29 are connected to each other to disable injection when the fuel injection pump 25 receives a drive signal.
一方、３０は燃料噴射が停止される残気筒からの排気ガ
スがフィルタ一部材４に導入されるのを遮断する遮断装
置で、この遮断装置３０は、排気弁２２の動弁機構６１
にバルブセレクタ３２を設けてなり、このバルブセレク
タ３２は制御装置２４からの駆動信号を受けたときに、
カム６３と排気弁２２とを連係するロッカアーム６４の
支点位置を後退させて、排気弁２２を閉状態に保持する
よう設けられている。On the other hand, reference numeral 30 denotes a shutoff device that blocks exhaust gas from being introduced into the filter member 4 from the remaining cylinders in which fuel injection is stopped.
is provided with a valve selector 32, and when this valve selector 32 receives a drive signal from the control device 24,
The fulcrum position of a rocker arm 64 that links the cam 63 and the exhaust valve 22 is moved backward to hold the exhaust valve 22 in a closed state.
上記燃料噴射装置２３および遮断装置６０の作動を制御
する制御装置２４には、前例と同様に、排圧センサー１
４および負荷センサー１５からの検出信号が入力される
。この制御装置２４は、目詰り時に特定気筒の燃料噴射
を増量するよう燃料噴射ポンプ２５に制御信号を出力す
る一方、残気筒の燃料噴射を停止するよう燃料噴射ノズ
ル２７のノズルセレクタ２６に駆動信号を出力し減筒運
転を行うとともに、遮断装置３０のバルブセレクタ６２
に駆動信号を出力して残気筒からの排気ガスがフィルタ
一部材４に導入さ２するのを阻止するよう設けられてい
る。The control device 24 that controls the operation of the fuel injection device 23 and the shutoff device 60 includes an exhaust pressure sensor 1 as in the previous example.
Detection signals from 4 and load sensor 15 are input. This control device 24 outputs a control signal to the fuel injection pump 25 to increase the amount of fuel injected to a specific cylinder when the blockage occurs, and a drive signal to the nozzle selector 26 of the fuel injection nozzle 27 to stop the fuel injection to the remaining cylinders. is output and cylinder reduction operation is performed, and the valve selector 62 of the shutoff device 30
The filter member 4 is provided to output a drive signal to prevent exhaust gas from the remaining cylinders from being introduced into the filter member 4 .
よって、上記実施例によれば、前例と同様、目詰り発生
時に減筒運転を行って特定気筒から排出される排気ガス
温度を上昇するとともに、燃料噴射が停止された残気筒
の排気ガスのフィルタ一部材への導入を阻止し、フィル
タ一部材４の温度を有効に上昇して該フィルタ一部材４
に捕集している微粒子を焼失させるものである。Therefore, according to the above embodiment, similarly to the previous example, when clogging occurs, cylinder reduction operation is performed to increase the temperature of the exhaust gas discharged from a specific cylinder, and the exhaust gas filter of the remaining cylinders in which fuel injection has been stopped is performed. The filter member 4 is prevented from being introduced into the filter member 4, and the temperature of the filter member 4 is effectively increased.
This is to burn out the fine particles that are collected in the tank.
本発明は上記同実施例の構造に限定されるものではなく
種々の変形例を包含している。すなわち、フィルタ一部
材４としては、多孔質セラミックに代えて金属ワイヤメ
ツシュを用いてもよい。また、触媒としてはフィルタ一
部材４に一体的にコーティングしたもののほか、フィル
タ一部材４の上流側に金属線状に形成した触媒を配設す
るようにしてもよいが、この触媒は必須のものでなく、
こわを付設す乞と未燃焼成分との酸化反応により、フィ
ルタ一温度の上昇がより確実に代えるものである。The present invention is not limited to the structure of the same embodiment described above, but includes various modifications. That is, as the filter member 4, a metal wire mesh may be used instead of porous ceramic. In addition to the catalyst that is integrally coated on the filter member 4, a catalyst formed in the shape of a metal wire may be provided on the upstream side of the filter member 4, but this catalyst is essential. Not, but
Due to the oxidation reaction between the unburned components and the addition of stiffness, the temperature of the filter increases more reliably.
また、目詰り状態の検出は上記排圧センサー１４による
もののほか、フィルタ一部材４に電極を設けてカーボン
粒子等の付着に起因する抵抗値変化から検出するように
してもよい。さらに、実際のフィルタ一部材４の目詰り
状態を検出することなく、運転時間もしくは走行距離の
積算により所定間隔ごとに、目詰り解消作動を行うよう
にしてもよい。Further, in addition to using the exhaust pressure sensor 14 described above, the clogging state may be detected by providing an electrode on the filter member 4 and detecting a change in resistance value due to adhesion of carbon particles or the like. Furthermore, without detecting the actual clogging state of the filter member 4, the clogging removal operation may be performed at predetermined intervals based on the integration of operating time or travel distance.
さらに、減筒運転を行う機構としては、実施例／の燃料
噴射装置９におけるものと実施例２の燃料噴射装置２６
におけるものとは互換性があり、゛遮断装置５，３０と
の組合せは任意に行われる。Furthermore, the mechanism for performing cylinder reduction operation is the one in the fuel injection device 9 of the embodiment/1 and the fuel injection device 26 of the second embodiment.
It is compatible with the one shown in , and can be combined with the shutoff devices 5 and 30 as desired.
その他、減筒運転機構、遮断装置としては公知のものが
適宜採用可能である。In addition, known mechanisms can be used as appropriate for the cylinder reduction operation mechanism and the shutoff device.
一方、フィルタ一部材４の温度もしくは排気温度を検出
する温度センサーを設け、制御装置１６゜２４はこの温
度センサーの検出温度が所定値以上のときにのみ、目詰
り解消を行うようにしてもよい。さらに、減筒運転への
切換時におけるトルク変動に対処して燃料噴射率を低下
させるようにしてもよい。On the other hand, a temperature sensor that detects the temperature of the filter member 4 or the exhaust temperature may be provided, and the control device 16.24 may perform clogging removal only when the temperature detected by the temperature sensor is equal to or higher than a predetermined value. . Furthermore, the fuel injection rate may be reduced in response to torque fluctuations when switching to reduced cylinder operation.
以上説明したように、本発明によれば、フィルタ一部材
の目詰り時もしくは所定間隔ごとに、特定気筒の燃料噴
射を増量する一方、残気筒の燃料噴射を停止して減筒運
転を行って排気温度が上昇した排気ガスをフィルタ一部
材に導入するとともに、残気筒の排気ガスのフィルタ一
部材への導入を遮断するようにしたことにより、有効に
フィルタ一部側の温度を上昇し、微粒子成分を確実に燃
焼除去することができ、良好な燃費性を維持して長期間
にわたって微粒子成分の排出を抑制することができる利
点を有する。As explained above, according to the present invention, when a filter member is clogged or at predetermined intervals, fuel injection in a specific cylinder is increased, while fuel injection in the remaining cylinders is stopped to perform cylinder reduction operation. By introducing the exhaust gas whose exhaust temperature has increased into the filter member and blocking the introduction of the exhaust gas from the remaining cylinders into the filter member, the temperature on the filter part side is effectively increased and particulates are removed. It has the advantage of being able to reliably burn off components, maintain good fuel efficiency, and suppress emissions of particulate components over a long period of time.
第１図は本発明の実施例／における排気ガス浄化装置を
有するディーゼルエンジンの概略構成図。
第２図は同実施例２を示す概略構成図である。
１．１６・・・・・・ディーゼルエンジン、２．２０・
・・・・・排気通路、６・・・・・・反応器、４・・・
・・・フィルタ一部材、５．３０・・・・・・遮断装置
、９，２３・・・・・燃料噴射装置、１３．２４・・・
・・制御装置、１４・・・・・排圧センサーFIG. 1 is a schematic diagram of a diesel engine having an exhaust gas purification device according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram showing the second embodiment. 1.16...Diesel engine, 2.20.
...Exhaust passage, 6...Reactor, 4...
...Filter member, 5.30...Shutoff device, 9,23...Fuel injection device, 13.24...
...Control device, 14...Exhaust pressure sensor
Claims (1)
材を排気通路に設けたディーゼルエンジンの排気ガス浄
化装置において、特定気筒の燃料噴射を増量する一方残
気筒の燃料噴射を停止する減筒運転機構と％残気筒から
の排気ガスのフィルタ一部材への導入を遮断する遮断装
置と、フィルタ一部材の目詰り時もしくは所定間隔ごと
に、上記減筒運転機構および遮断装置を作動させ減筒運
転を行うとともに残気筒の排気ガスのフィルタ一部材へ
の導入を阻止する制御装置とを設けたことを特徴とする
ディーゼルエンジンの排気ガス浄化装置。(1) In a diesel engine exhaust gas purification device in which a filter member for collecting particulate components in exhaust gas is installed in the exhaust passage, cylinder reduction is performed in which the amount of fuel injection in a specific cylinder is increased while fuel injection in the remaining cylinders is stopped. An operating mechanism and a shutoff device that shuts off the introduction of exhaust gas from the residual cylinder into the filter member, and when the filter member becomes clogged or at predetermined intervals, the cylinder reduction operation mechanism and the shutoff device are activated to reduce the number of cylinders. 1. An exhaust gas purification device for a diesel engine, comprising a control device that performs operation and prevents exhaust gas from remaining cylinders from being introduced into a filter member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57189728A JPS5979024A (en) | 1982-10-27 | 1982-10-27 | Exhaust-gas purifying apparatus for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57189728A JPS5979024A (en) | 1982-10-27 | 1982-10-27 | Exhaust-gas purifying apparatus for diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5979024A true JPS5979024A (en) | 1984-05-08 |
| JPH037009B2 JPH037009B2 (en) | 1991-01-31 |
Family
ID=16246191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57189728A Granted JPS5979024A (en) | 1982-10-27 | 1982-10-27 | Exhaust-gas purifying apparatus for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5979024A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0234218A1 (en) * | 1986-02-19 | 1987-09-02 | FEV Forschungsgesellschaft für Energietechnik und Verbrennungsmotoren mbH | Regeneration system for exhaust gas particle filter systems |
| JPS6321718U (en) * | 1986-07-28 | 1988-02-13 | ||
| DE3817980A1 (en) * | 1988-05-27 | 1989-11-30 | Daimler Benz Ag | Device for regenerating soot burn-off filters |
| US8069657B2 (en) * | 2007-06-05 | 2011-12-06 | The United States Of America As Represented By The Administrator Of The U.S. Environmental Protection Agency | Diesel particulate filter regeneration system |
| WO2015192859A1 (en) * | 2014-06-16 | 2015-12-23 | Volvo Truck Corporation | A two-stroke opposed piston internal combustion engine |
| GB2559741A (en) * | 2017-02-15 | 2018-08-22 | Gm Global Tech Operations Llc | Method of regenerating a particulate filter of an internal combustion engine |
-
1982
- 1982-10-27 JP JP57189728A patent/JPS5979024A/en active Granted
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0234218A1 (en) * | 1986-02-19 | 1987-09-02 | FEV Forschungsgesellschaft für Energietechnik und Verbrennungsmotoren mbH | Regeneration system for exhaust gas particle filter systems |
| US4709547A (en) * | 1986-02-19 | 1987-12-01 | Fev Motorentechnik Gmbh & Co. Kg | Process for the regeneration of engine emission particulates deposited in a particulate trap |
| JPS6321718U (en) * | 1986-07-28 | 1988-02-13 | ||
| DE3817980A1 (en) * | 1988-05-27 | 1989-11-30 | Daimler Benz Ag | Device for regenerating soot burn-off filters |
| US8069657B2 (en) * | 2007-06-05 | 2011-12-06 | The United States Of America As Represented By The Administrator Of The U.S. Environmental Protection Agency | Diesel particulate filter regeneration system |
| WO2015192859A1 (en) * | 2014-06-16 | 2015-12-23 | Volvo Truck Corporation | A two-stroke opposed piston internal combustion engine |
| US10690051B2 (en) | 2014-06-16 | 2020-06-23 | Volvo Truck Corporation | Two-stroke opposed piston internal combustion engine |
| GB2559741A (en) * | 2017-02-15 | 2018-08-22 | Gm Global Tech Operations Llc | Method of regenerating a particulate filter of an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH037009B2 (en) | 1991-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100572769C (en) | Engine exhaust emission control device | |
| US8037676B2 (en) | Regeneration control method for exhaust gas purification system, and exhaust gas purification system | |
| US6742331B2 (en) | Device for purifying exhaust gas of diesel engines | |
| WO2004104385A1 (en) | Exhaust gas purifier | |
| CN101142382A (en) | Exhaust gas purifier of internal combustion engine | |
| JP2002349241A (en) | Exhaust emission control device for diesel engine | |
| WO2007046518A1 (en) | Exhaust gas purifier for diesel engine | |
| JP2006320854A (en) | Selective reduction type catalyst and exhaust gas purifier of engine for use therein | |
| JP2004204699A (en) | Exhaust gas purifying device | |
| JP2004162600A (en) | Exhaust emission control device for internal combustion engine | |
| JPS5979024A (en) | Exhaust-gas purifying apparatus for diesel engine | |
| JP2005090256A (en) | Pressure detecting mechanism in exhaust emission control device of internal combustion engine | |
| JP3491341B2 (en) | Diesel engine exhaust purification system | |
| JP4210555B2 (en) | Exhaust purification equipment | |
| JP2004176636A (en) | Exhaust emission control device for internal combustion engine | |
| JP2010196569A (en) | Exhaust emission control system and exhaust emission control method | |
| JP2007113401A (en) | Exhaust emission control device for engine | |
| JP2007127069A (en) | Exhaust emission control device | |
| JPH05321648A (en) | Exhaust emission control device | |
| JP2004019624A (en) | Exhaust emission control device of internal combustion engine | |
| JP2004092413A (en) | Exhaust aftertreatment system | |
| JP2005291062A (en) | Filter device, and exhaust emission control device provided with the same | |
| JPS6233939Y2 (en) | ||
| JP2005133636A (en) | Exhaust emission control device | |
| JP2001082128A (en) | Exhaust emission control method for internal combustion engine |