JPH0544437A - Exhaust gas purifying device for diesel engine - Google Patents
Exhaust gas purifying device for diesel engineInfo
- Publication number
- JPH0544437A JPH0544437A JP3199201A JP19920191A JPH0544437A JP H0544437 A JPH0544437 A JP H0544437A JP 3199201 A JP3199201 A JP 3199201A JP 19920191 A JP19920191 A JP 19920191A JP H0544437 A JPH0544437 A JP H0544437A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- exhaust
- gas recirculation
- filter
- amount
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、排気微粒子を捕集する
ためのフィルタを備えた、ディーゼル機関の排気浄化装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust emission control device for a diesel engine equipped with a filter for collecting exhaust particulates.
【０００２】[0002]
【従来の技術】一般に、ディーゼル機関の排気中に含有
される排気微粒子であるパティキュレートを排気中から
取り除く方法として、例えば排気をフィルタに通過させ
て、パティキュレートを捕集する方法が知られている。
この方法によると、捕集されたパティキュレートはフィ
ルタに堆積する一方であり、その堆積量が増大すると排
気圧力が上昇してしまうため、パティキュレートが所定
量以上堆積した場合には、このパティキュレートを酸化
燃焼させて除去するという再生処理を行う。2. Description of the Related Art Generally, as a method of removing particulates, which are exhaust particulates contained in the exhaust gas of a diesel engine, from the exhaust gas, for example, a method of passing the exhaust gas through a filter to collect the particulates is known. There is.
According to this method, the collected particulates are only deposited on the filter, and the exhaust pressure rises when the deposition amount increases. Therefore, when the particulates are deposited in a predetermined amount or more, the particulates are collected. A regeneration process is performed to remove the oxidative combustion.
【０００３】パティキュレートを良好に燃焼させるため
には、排気温度を所定温度以上に維持する必要があるの
で、従来の排気浄化装置では、フィルタの再生を確実に
行うための加熱装置をフィルタの上流側に設けて、フィ
ルタ再生時における排気温度を所定の温度に維持させて
いる。排気を昇温させる加熱温度としては、例えばヒー
タやバーナが知られている（特開昭６３−６５１１３号
公報及び特開昭６３−２３５６１２号公報参照）。ま
た、このほかにも、排気やフィルタを加熱することなく
パティキュレート自身を内部発熱させる加熱装置とし
て、フィルタに電磁波を加えるマグネトロン等が知られ
ている（特開昭６３−９６１１号公報参照）。In order to satisfactorily burn particulates, it is necessary to maintain the exhaust gas temperature at or above a predetermined temperature. Therefore, in the conventional exhaust gas purification device, a heating device for surely regenerating the filter is provided upstream of the filter. It is provided on the side to maintain the exhaust temperature at a predetermined temperature when the filter is regenerated. As a heating temperature for raising the temperature of exhaust gas, for example, a heater or a burner is known (see JP-A-63-65113 and JP-A-63-235612). In addition to this, as a heating device that internally heats the particulate itself without heating the exhaust gas or the filter, a magnetron or the like that applies electromagnetic waves to the filter is known (see JP-A-63-9611).
【０００４】一方、排気中のＮＯx を低減させるため
に、排気の一部を吸気に導入して再循環させる、いわゆ
る排気還流機能を備えた機関においては、特に前述した
ような加熱装置を設けることなく、高温の排気を吸気に
混入することにより排気が昇温することが知られてい
る。On the other hand, in order to reduce NOx in the exhaust gas, an engine having a so-called exhaust gas recirculation function in which a part of the exhaust gas is introduced into the intake air and recirculated is provided with the heating device as described above. However, it is known that the temperature of exhaust gas rises when hot exhaust gas is mixed into intake air.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな排気還流機能を備えた従来の排気浄化装置にあって
は、昇温の効果を高めるために排気還流量を増加し過ぎ
ると機関運転時の燃焼状態が悪くなり、機関の運転性や
耐久性に影響を及ぼす。また、機関の燃焼状態が悪くな
ると、排気中に含まれるパティキュレート量が増大し、
かえってフィルタの再生を妨げてしまう虞れがある。However, in the conventional exhaust emission control device having such an exhaust gas recirculation function, if the exhaust gas recirculation amount is increased excessively in order to enhance the effect of temperature rise, the engine exhaust gas will not be discharged. The combustion condition deteriorates, which affects the drivability and durability of the engine. Also, when the combustion state of the engine deteriorates, the amount of particulates contained in the exhaust increases,
On the contrary, the regeneration of the filter may be hindered.
【０００６】本発明は、このような従来の課題を解決す
るためになされたもので、その目的とするところは、排
気還流量を増加させても、排気エミッション及び運転性
の悪化を伴うことなく、排気の昇温状態を維持し、フィ
ルタに堆積したパティキュレートを良好に燃焼させるこ
とができるディーゼル機関の排気浄化装置を提供するこ
とにある。The present invention has been made in order to solve such a conventional problem, and an object thereof is to increase exhaust gas recirculation amount without causing deterioration of exhaust emission and drivability. An object of the present invention is to provide an exhaust emission control device for a diesel engine, which can maintain the temperature rise of exhaust gas and satisfactorily burn particulates accumulated on the filter.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明におけるディーゼル機関の排気浄化装置にあ
っては、車両に搭載され、排気の一部を吸気系に導入し
て再循環を行う排気還流機能を有するとともに、排気通
路にフィルタが設けられたディーゼル機関の排気浄化装
置において、前記排気還流量を調整する排気還流量調整
手段と、前記車両の減速状態を検出する検出手段と、こ
の検出手段により車両の減速状態が検出されたときに前
記排気還流量調整手段による排気還流量を増加させる制
御手段とを有することを特徴とするものである。In order to achieve the above object, an exhaust emission control device for a diesel engine according to the present invention is mounted on a vehicle and a part of exhaust gas is introduced into an intake system for recirculation. Having an exhaust gas recirculation function to perform, in an exhaust gas purification device of a diesel engine provided with a filter in the exhaust passage, an exhaust gas recirculation amount adjusting means for adjusting the exhaust gas recirculation amount, a detecting means for detecting a deceleration state of the vehicle, And a control unit for increasing the exhaust gas recirculation amount by the exhaust gas recirculation amount adjustment unit when the deceleration state of the vehicle is detected by the detection unit.
【０００８】[0008]
【作用】検出手段が車両の減速状態を検出すると、制御
手段が排気還流量調整手段を制御して、排気還流量を増
加する。これにより、吸気系に導入される排気量が増加
し、吸気温度が上昇するので、減速時における排気が昇
温状態となる。When the detecting means detects the deceleration state of the vehicle, the control means controls the exhaust gas recirculation amount adjusting means to increase the exhaust gas recirculation amount. As a result, the amount of exhaust gas introduced into the intake system increases, and the intake air temperature rises, so the exhaust gas temperature rises during deceleration.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１０】まず、本発明の第一実施例を図１に示す。
図１は、車両に搭載されたディーゼル機関の排気浄化装
置の全体図であり、ディーゼル機関の機関本体１には、
吸気マニホールド３と排気マニホールド５とが取付けら
れ、吸気マニホールド３及び排気マニホールド５には、
吸気通路である吸気管７と排気通路である排気管９がそ
れぞれ接続されている。First, a first embodiment of the present invention is shown in FIG.
FIG. 1 is an overall view of an exhaust emission control device for a diesel engine mounted on a vehicle.
The intake manifold 3 and the exhaust manifold 5 are attached to the intake manifold 3 and the exhaust manifold 5,
An intake pipe 7 that is an intake passage and an exhaust pipe 9 that is an exhaust passage are connected to each other.
【００１１】排気管９には、排気微粒子捕集部材である
フィルタ１１が接続されている。このフィルタ１１は、
セラミック製の連続多孔質体に酸化触媒を担持させたも
のであり、排気中に含まれる排気微粒子であるパティキ
ュレートを捕集する。フィルタ１１の下流側の排気通路
１３にはマフラ１５が設けられ、マフラ１５の出口側よ
り排気が大気中に流出する。A filter 11 which is an exhaust particulate collecting member is connected to the exhaust pipe 9. This filter 11 is
This is a ceramic continuous porous body on which an oxidation catalyst is supported, and collects particulates which are exhaust particulates contained in the exhaust. A muffler 15 is provided in the exhaust passage 13 on the downstream side of the filter 11, and exhaust gas flows into the atmosphere from the outlet side of the muffler 15.
【００１２】吸気通路と排気通路とは排気還流通路１７
で連通し、排気還流通路１７には、該通路を開閉する排
気還流弁１９が設けられている。この排気還流弁１９が
開いているときは、機関本体１から排出された排気の一
部が再循環して吸気系に導入される。The intake passage and the exhaust passage are the exhaust gas recirculation passage 17
The exhaust gas recirculation passage 17 is provided with an exhaust gas recirculation valve 19 that opens and closes the passage. When the exhaust gas recirculation valve 19 is open, part of the exhaust gas discharged from the engine body 1 is recirculated and introduced into the intake system.
【００１３】吸気管７には排気還流量調整手段としての
吸気絞り弁２１が接続され、この吸気絞り弁２１は吸気
通路を開閉し、外気からの吸気量を増減する。排気還流
弁１９を開放した状態で、吸気絞り弁２１を所定開度ま
で閉じて吸気量を減少させると、機関本体１に供給され
る外気の量が制限されて吸気通路が負圧となり、この負
圧により排気通路から吸気通路への排気還流量が増加す
る。An intake throttle valve 21 as an exhaust gas recirculation amount adjusting means is connected to the intake pipe 7, and the intake throttle valve 21 opens and closes an intake passage to increase or decrease the intake air amount from the outside air. When the intake throttle valve 21 is closed to a predetermined opening degree to reduce the intake air amount while the exhaust gas recirculation valve 19 is open, the amount of outside air supplied to the engine body 1 is limited and the intake passage becomes negative pressure. The negative pressure increases the amount of exhaust gas recirculation from the exhaust passage to the intake passage.
【００１４】コントロールユニット２３には、減速状態
検出回路２５、再生時期判断回路２７及び制御手段２９
が設けられている。検出手段は、減速状態検出回路２
５、クランク角センサ３１、及びスロットルセンサ３３
によって構成され、減速状態検出回路２５は、クランク
角センサ３１によって検出された機関回転数Ｎe 、及び
スロットルセンサ３３によって検出されたアクセル開度
Ｃ／Ｌに基づいて、車両の減速状態を検出する。本実施
例においては、アクセル開度Ｃ／Ｌが全閉状態で、機関
回転数Ｎe が所定値以上のときを減速状態とする。ま
た、再生時期判断回路２７は、同様に検出された機関回
転数Ｎe 及びアクセル開度Ｃ／Ｌに基づく、いわゆる運
転履歴によりフィルタ１１に堆積したパティキュレート
量を積算し、その堆積量が所定量以上となったときを再
生時期とする。The control unit 23 includes a deceleration state detection circuit 25, a regeneration timing judgment circuit 27 and a control means 29.
Is provided. The detection means is the deceleration state detection circuit 2
5, crank angle sensor 31, and throttle sensor 33
The deceleration state detection circuit 25 detects the deceleration state of the vehicle based on the engine speed Ne detected by the crank angle sensor 31 and the accelerator opening C / L detected by the throttle sensor 33. In this embodiment, the deceleration state is set when the accelerator opening C / L is fully closed and the engine speed Ne is equal to or higher than a predetermined value. Further, the regeneration timing judging circuit 27 integrates the amount of particulates accumulated on the filter 11 based on the so-called operation history based on the similarly detected engine speed Ne and the accelerator opening C / L, and the accumulated amount is a predetermined amount. The time when the above is reached is the regeneration time.
【００１５】制御手段２９は、再生時期判断回路２７に
よって再生時期と判断され、かつ検出手段２５によって
車両の減速状態と検出されたときに、排気還流弁１９を
全開し、吸気絞り弁２１を所定開度まで閉じて、排気還
流量を強制的に増加させる。The control means 29 fully opens the exhaust gas recirculation valve 19 and sets the intake throttle valve 21 to a predetermined value when the regeneration timing determination circuit 27 determines that it is the regeneration timing and the detection means 25 detects that the vehicle is in the decelerated state. Close to the opening to forcefully increase the exhaust gas recirculation amount.
【００１６】次に、このように構成された本実施例によ
るディーゼル機関の排気浄化装置の作用について説明す
る。Next, the operation of the exhaust emission control system for a diesel engine according to the present embodiment thus constructed will be described.
【００１７】ディーゼル機関の運転時において、吸気管
７から供給された空気は機関本体１の燃焼室内で圧縮さ
れ、この圧縮空気中に図示外の燃料噴射弁から燃料が供
給されて着火燃焼し、燃焼ガスが発生する。この燃焼ガ
スが排気となり、フィルタ１１及びマフラ１５を通過し
て大気中へ排出される。排気中には、排気微粒子である
パティキュレートが存在し、このパティキュレートは、
排気がフィルタ１１を通過するときに捕集されて堆積す
る。During operation of the diesel engine, the air supplied from the intake pipe 7 is compressed in the combustion chamber of the engine body 1, and fuel is supplied to the compressed air from a fuel injection valve (not shown) for ignition and combustion. Combustion gas is generated. This combustion gas becomes exhaust gas, passes through the filter 11 and the muffler 15, and is exhausted to the atmosphere. In the exhaust gas, there are particulates that are exhaust particulates, and these particulates are
When the exhaust gas passes through the filter 11, it is collected and accumulated.
【００１８】再生時期判断回路２７は、フィルタ１１に
捕集されたパティキュレートの推定堆積量を、機関回転
数Ｎe 及びアクセル開度Ｃ／Ｌの積算値から算出し、こ
の推定堆積量が所定量以上になると制御手段２９へ出力
信号を送出する。The regeneration timing judgment circuit 27 calculates the estimated accumulation amount of the particulates collected by the filter 11 from the integrated value of the engine speed Ne and the accelerator opening C / L, and the estimated accumulation amount is a predetermined amount. When the above is reached, an output signal is sent to the control means 29.
【００１９】一方、減速状態検出回路２５は、アクセル
開度Ｃ／Ｌが全閉状態で、機関回転数Ｎe が所定値以上
の間、すなわち、車両が減速時状態にあるとき制御手段
２９へ出力信号を送出する。On the other hand, the deceleration state detection circuit 25 outputs to the control means 29 while the accelerator opening C / L is in the fully closed state and the engine speed Ne is above a predetermined value, that is, when the vehicle is in the deceleration state. Send a signal.
【００２０】制御手段２９は、再生時期判断回路２７か
らの出力信号を受けた後で減速状態検出回路２５からの
出力信号を受けている間、すなわちフィルタの再生時期
における減速時の間、排気還流弁１９及び吸気絞り弁２
１へそれぞれ出力信号を送出して、排気還流弁１９を全
開し、吸気絞り弁２１を所定開度まで閉じる。排気還流
弁１９を全開して吸気絞り弁２１を閉じることにより、
供給される外気の量が制限されて吸気通路が負圧とな
り、排気還流量が増加する。なお、この排気還流量の増
加は、機関の耐久性に影響のない範囲で行うものとす
る。The control means 29 receives the output signal from the regeneration timing determination circuit 27 and then receives the output signal from the deceleration state detection circuit 25, that is, during deceleration at the regeneration timing of the filter, the exhaust gas recirculation valve 19. And intake throttle valve 2
1, the output signal is sent to each valve 1, the exhaust gas recirculation valve 19 is fully opened, and the intake throttle valve 21 is closed to a predetermined opening degree. By fully opening the exhaust gas recirculation valve 19 and closing the intake throttle valve 21,
The amount of outside air supplied is limited, the intake passage becomes negative pressure, and the exhaust gas recirculation amount increases. The exhaust gas recirculation amount is increased within a range that does not affect the durability of the engine.
【００２１】このように、本実施例によれば、フィルタ
の再生時に車両が減速状態となると、外気からの吸気量
を制限し排気還流量を増加させて、高温の排気を多量に
吸気に混入させているので、吸気温度が上昇し、排気の
昇温状態が維持される。これにより、フィルタ１１に担
持された触媒が活性状態に保たれ、フィルタ１１の再生
が良好に行われる。また、車両の減速時には、基本的に
機関への燃料供給を行わないので、排気還流量を増加さ
せても、排気中のパティキュレート量が増大するような
不都合はなく、また機関の運転性の悪化も起こらない。As described above, according to this embodiment, when the vehicle is decelerated during the regeneration of the filter, the amount of intake air from the outside air is limited to increase the exhaust gas recirculation amount, and a large amount of high temperature exhaust gas is mixed into the intake air. As a result, the intake air temperature rises and the temperature rise of the exhaust gas is maintained. As a result, the catalyst carried on the filter 11 is kept in an active state, and the filter 11 is regenerated properly. Further, when the vehicle is decelerated, fuel is not basically supplied to the engine, so even if the exhaust gas recirculation amount is increased, there is no inconvenience that the amount of particulates in the exhaust gas increases, and the drivability of the engine is reduced. No deterioration will occur.
【００２２】次に、本発明の第二実施例を図２に示す。
図２は図１に対応する図であり、図１と同一の部分には
同一の番号を付す。第一実施例においては、クランク角
センサ３１からの機関回転数Ｎe とスロットルセンサ３
３からのアクセル開度Ｃ／Ｌとに基づいて減速状態検出
回路２５により減速状態を検出したが、本実施例におい
ては、検出手段としてブレーキスイッチ３５を設け、こ
のブレーキスイッチ３５からのＯＮ／ＯＦＦ信号がＯＮ
状態のときを減速状態として、制御手段２９へ直接送出
する。従って、本実施例においては、検出手段の構成を
簡素化することができる。Next, a second embodiment of the present invention is shown in FIG.
2 is a diagram corresponding to FIG. 1, and the same parts as those in FIG. 1 are denoted by the same reference numerals. In the first embodiment, the engine speed Ne from the crank angle sensor 31 and the throttle sensor 3
The deceleration state detection circuit 25 detects the deceleration state based on the accelerator opening C / L from 3. However, in the present embodiment, a brake switch 35 is provided as a detection means, and the brake switch 35 turns ON / OFF. Signal is ON
The state is set as the deceleration state and is directly sent to the control means 29. Therefore, in the present embodiment, the structure of the detecting means can be simplified.
【００２３】次に、本発明の第三実施例を図３に示す。
図３は図１に対応する図であり、図１と同一の部分には
同一の番号を付す。第一実施例においては、排気還流量
調整手段として吸気絞り弁２１を吸気通路に設けたが、
本実施例においては、代わりに排気通路に排気絞り弁３
７を設ける。この排気絞り弁３７は、排気通路９を開閉
し、排気量を増減させる。排気絞り弁３７を所定開度ま
で閉じて排気量を減少させると、排気通路９の排気圧力
が上昇するため、排気還流量が増加する。従って、フィ
ルタ１１の再生時に車両が減速状態となると、制御手段
２９は、排気還流バルブ１９及び排気絞り弁３７へそれ
ぞれ出力信号を送出して、排気還流弁１９を全開し、排
気絞り弁３７を所定開度まで閉じる。Next, a third embodiment of the present invention is shown in FIG.
FIG. 3 is a diagram corresponding to FIG. 1, and the same parts as those in FIG. 1 are denoted by the same reference numerals. In the first embodiment, the intake throttle valve 21 is provided in the intake passage as the exhaust gas recirculation amount adjusting means.
In the present embodiment, instead, the exhaust throttle valve 3 is provided in the exhaust passage.
7 is provided. The exhaust throttle valve 37 opens and closes the exhaust passage 9 to increase or decrease the exhaust amount. When the exhaust throttle valve 37 is closed to a predetermined opening degree to reduce the exhaust gas amount, the exhaust gas pressure in the exhaust passage 9 rises, so that the exhaust gas recirculation amount increases. Therefore, when the vehicle is decelerated during the regeneration of the filter 11, the control means 29 sends output signals to the exhaust gas recirculation valve 19 and the exhaust gas throttle valve 37 to fully open the exhaust gas recirculation valve 19 to open the exhaust gas throttle valve 37. Close to the specified opening.
【００２４】[0024]
【発明の効果】以上説明してきたように、本発明によれ
ば、車両が減速しているときに排気還流量を増加するよ
うにしたので、特別な装置を用いることなく、また、排
気エミッションの悪化や車両の運転性の悪化を引き起こ
すことなく、排気の昇温状態を維持することができ、フ
ィルタに捕集された排気微粒子を燃焼し易い状態とする
ことができる。As described above, according to the present invention, the exhaust gas recirculation amount is increased when the vehicle is decelerating. Therefore, no special device is used and the exhaust emission It is possible to maintain the temperature rise state of the exhaust gas without causing the deterioration of the drivability of the vehicle and to make the exhaust particulate matter collected by the filter easy to burn.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明による第一実施例のディーゼル機関の排
気浄化装置の全体図である。FIG. 1 is an overall view of an exhaust emission control device for a diesel engine according to a first embodiment of the present invention.
【図２】本発明による第二実施例のディーゼル機関の排
気浄化装置の全体図である。FIG. 2 is an overall view of an exhaust emission control device for a diesel engine according to a second embodiment of the present invention.
【図３】本発明による第三実施例のディーゼル機関の排
気浄化装置の全体図である。FIG. 3 is an overall view of an exhaust emission control system for a diesel engine of a third embodiment according to the present invention.
１１ フィルタ １７ 排気還流通路 ２１ 吸気絞り弁（排気還流量調整手段） ２５ 減速状態検出回路（検出手段） ２９ 制御手段 ３１ クランク角センサ（検出手段） ３３ スロットルセンサ（検出手段） ３５ ブレーキスイッチ（検出手段） ３７ 排気絞り弁（排気還流量調整手段） Reference Signs List 11 filter 17 exhaust gas recirculation passage 21 intake throttle valve (exhaust gas recirculation amount adjusting means) 25 deceleration state detection circuit (detection means) 29 control means 31 crank angle sensor (detection means) 33 throttle sensor (detection means) 35 brake switch (detection means) ) 37 Exhaust throttle valve (exhaust gas recirculation amount adjusting means)
Claims (1)
導入して再循環を行う排気還流機能を有するとともに、
排気通路にフィルタが設けられたディーゼル機関の排気
浄化装置において、前記排気還流量を調整する排気還流
量調整手段と、前記車両の減速状態を検出する検出手段
と、この検出手段により車両の減速状態が検出されたと
きに前記排気還流量調整手段による排気還流量を増加さ
せる制御手段とを有することを特徴とするディーゼル機
関の排気浄化装置。1. An exhaust gas recirculation function, which is mounted on a vehicle and introduces a part of exhaust gas into an intake system for recirculation,
In an exhaust emission control device for a diesel engine having a filter provided in an exhaust passage, an exhaust gas recirculation amount adjusting means for adjusting the exhaust gas recirculation amount, a detecting means for detecting a deceleration state of the vehicle, and a deceleration state of the vehicle by the detecting means. And a control means for increasing the exhaust gas recirculation amount by the exhaust gas recirculation amount adjusting means when detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3199201A JPH0544437A (en) | 1991-08-08 | 1991-08-08 | Exhaust gas purifying device for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3199201A JPH0544437A (en) | 1991-08-08 | 1991-08-08 | Exhaust gas purifying device for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0544437A true JPH0544437A (en) | 1993-02-23 |
Family
ID=16403825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3199201A Pending JPH0544437A (en) | 1991-08-08 | 1991-08-08 | Exhaust gas purifying device for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0544437A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1541828A1 (en) | 2003-12-10 | 2005-06-15 | Nissan Motor Co., Ltd. | Regeneration of diesel particulate filter |
| US6931842B2 (en) | 2002-11-29 | 2005-08-23 | Nissan Motor Co., Ltd. | Regeneration of diesel particulate filter |
| US7028466B2 (en) | 2003-01-16 | 2006-04-18 | Nissan Motor Co., Ltd. | Regeneration of diesel particulate filter |
| JP2007162568A (en) * | 2005-12-14 | 2007-06-28 | Nissan Motor Co Ltd | Exhaust gas filter regeneration control device and exhaust gas filter regeneration control method |
| JP2009509080A (en) * | 2005-09-15 | 2009-03-05 | ボルボ ラストバグナー アーベー | Method for an internal combustion engine with exhaust recirculation |
-
1991
- 1991-08-08 JP JP3199201A patent/JPH0544437A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6931842B2 (en) | 2002-11-29 | 2005-08-23 | Nissan Motor Co., Ltd. | Regeneration of diesel particulate filter |
| US7028466B2 (en) | 2003-01-16 | 2006-04-18 | Nissan Motor Co., Ltd. | Regeneration of diesel particulate filter |
| EP1541828A1 (en) | 2003-12-10 | 2005-06-15 | Nissan Motor Co., Ltd. | Regeneration of diesel particulate filter |
| US7082754B2 (en) | 2003-12-10 | 2006-08-01 | Nissan Motor Co., Ltd. | Regeneration of diesel particulate filter |
| CN1327111C (en) * | 2003-12-10 | 2007-07-18 | 日产自动车株式会社 | Regeneration of diesel particulate filter |
| JP2009509080A (en) * | 2005-09-15 | 2009-03-05 | ボルボ ラストバグナー アーベー | Method for an internal combustion engine with exhaust recirculation |
| JP2007162568A (en) * | 2005-12-14 | 2007-06-28 | Nissan Motor Co Ltd | Exhaust gas filter regeneration control device and exhaust gas filter regeneration control method |
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