JPS6132122Y2 - - Google Patents
Info
- Publication number
- JPS6132122Y2 JPS6132122Y2 JP14620681U JP14620681U JPS6132122Y2 JP S6132122 Y2 JPS6132122 Y2 JP S6132122Y2 JP 14620681 U JP14620681 U JP 14620681U JP 14620681 U JP14620681 U JP 14620681U JP S6132122 Y2 JPS6132122 Y2 JP S6132122Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- filter member
- exhaust
- passage
- control valve
- 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.)
- Expired
Links
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 8
- 239000000446 fuel Substances 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- 238000001514 detection method Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Description
【考案の詳細な説明】
本考案は、排気通路にフイルター部材および目
詰まり解消用加熱装置を備えたデイーゼルエンジ
ンの排気浄化装置の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an exhaust gas purification device for a diesel engine, which includes a filter member and a clogging eliminating heating device in the exhaust passage.
一般にデイーゼルエンジンでは、ガソリンエン
ジンと比べて排気ガス中のカーボンの量が多いこ
とから、排気通路に、カーボン等の微粒子成分を
捕集して排気ガスを浄化するフイルター部材が設
けられる。この場合、排気ガス温度の比較的低い
運転状態が長く続くと、フイルターにカーボン等
が蓄積されて目詰まりを起こし、これによつて背
圧が上がり、エンジンの出力低下や燃費の悪化を
きたすという問題がある。 Generally, in a diesel engine, the amount of carbon in the exhaust gas is larger than that in a gasoline engine, so a filter member is provided in the exhaust passage to collect particulate components such as carbon and purify the exhaust gas. In this case, if the operating condition with relatively low exhaust gas temperature continues for a long time, carbon etc. will accumulate in the filter and cause clogging, which will increase back pressure and cause a decrease in engine output and worsening fuel efficiency. There's a problem.
このような問題の対策として、従来、例えば特
開54−12029号公報にみられるように、フイルタ
ー部材上流の排気通路にフイルター部材の目詰ま
り解消用バーナ装置を設け、該バーナ装置によ
り、フイルター部材に送られる排気ガスを高温に
してカーボン等を燃焼させるようにした装置は知
られている。ところが、従来のこの種の排気浄化
装置では、バーナ装置用の燃料が多く消費され、
経済性を損ねるという欠点があつた。すなわち、
上記バーナ装置はフイルターが目詰まりを生じた
ときの適当な時期に作動されるもので、その作動
時期について上記の公報に詳しくは説明されてい
ないが、アイドリング時にバーナ装置を作動させ
るようにすれば、排気ガスの流れが安定している
ためバーナ装置の制御が容易であり、かつ排気ガ
ス量が少ないためバーナ装置の燃料もアイドリン
グ時以外に作動させる場合よりは少なくてすむ。
しかし、このようにアイドリング時にバーナ装置
を作動させたとしても、低温の排気ガスをカーボ
ン等の燃焼に必要な高温度にまで加熱するには、
バーナ装置にはなおかなりの燃料を費やさなけれ
ばならなかつた。 As a countermeasure to this problem, conventionally, as seen in Japanese Patent Application Laid-open No. 54-12029, a burner device for eliminating clogging of the filter member is provided in the exhaust passage upstream of the filter member, and the burner device is used to unclog the filter member. A device is known that heats the exhaust gas sent to the engine to burn carbon and the like. However, with this type of conventional exhaust purification device, a large amount of fuel is consumed for the burner device.
It had the disadvantage of impairing economic efficiency. That is,
The above-mentioned burner device is activated at an appropriate time when the filter becomes clogged, and although the timing of activation is not explained in detail in the above-mentioned publication, it is possible to activate the burner device when the filter is idling. Since the flow of exhaust gas is stable, it is easy to control the burner device, and since the amount of exhaust gas is small, the amount of fuel for the burner device can be reduced compared to when the burner device is operated at times other than idling.
However, even if the burner device is operated during idling in this way, it is difficult to heat the low-temperature exhaust gas to the high temperature required to burn carbon, etc.
Considerable fuel still had to be spent on the burner equipment.
本考案はこれらの事情に鑑み、本来的にはNOx
低減のために用いられる排気ガス還流手段を利用
して、加熱装置作動時にとくに多量の排気ガスを
吸気系に還流させることにより排気ガスの温度を
引き上げ、これによつてフイルター部材の目詰ま
りを解消用加熱装置における消費エネルギー量を
大巾に節減することのできるデイーゼルエンジン
の排気浄化装置を提供するものである。 In view of these circumstances, the present invention essentially eliminates NO x
By using the exhaust gas recirculation means used for reduction, a particularly large amount of exhaust gas is recirculated to the intake system when the heating device is activated, raising the temperature of the exhaust gas, thereby eliminating clogging of the filter member. An object of the present invention is to provide an exhaust purification device for a diesel engine that can greatly reduce the amount of energy consumed in a heating device.
すなわち、本考案は、エンジンの排気通路に排
気中の微粒子成分を捕集するフイルター部材を設
けるとともに、フイルター部材上流の排気通路に
フイルター部材の目詰まり解消用加熱装置を設
け、フイルター部材の目詰まりを検出して加熱装
置を作動させるデイーゼルエンジンの排気浄化装
置において、加熱装置上流の排気通路と吸気通路
とを連通する排気還流通路と、該排気還流通路に
設けた排気還流量調節用の制御バルブと、加熱装
置の作動時に排気還流量を増大させるように上記
制御バルブを作動させる制御装置とを具備したも
のである。 That is, in the present invention, a filter member is provided in the exhaust passage of the engine to collect particulate components in the exhaust gas, and a heating device for eliminating clogging of the filter member is provided in the exhaust passage upstream of the filter member. An exhaust gas purification system for a diesel engine that detects and operates a heating device includes an exhaust gas recirculation passage that communicates an exhaust passage upstream of the heating device with an intake passage, and a control valve provided in the exhaust gas recirculation passage for adjusting the amount of exhaust gas recirculation. and a control device that operates the control valve to increase the amount of exhaust gas recirculation when the heating device is activated.
以下、本考案の実施例を図面によつて説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
１はデイーゼルエンジン本体、２はエアクリー
ナ３を介して吸入した空気と燃料供給装置（図示
省略）から供給される燃料との混合気をエンジン
本体１に供給する吸気通路、４は排気通路であ
る。上記排気通路４中には、排気ガス中の微粒子
成分を捕集するフイルター部材５が設けられてい
る。該フイルター部材５は、例えばコージライト
等のセラミツクからなるハニカム状の基体の端部
を交互に目詰めして、排気ガスが基体の微少な小
孔を通つて流れる際に排気ガス中の微粒子成分を
捕集するようにしたモノリスタイプのセラミツク
フイルター等にて形成されている。 1 is a diesel engine main body, 2 is an intake passage that supplies a mixture of air taken in through an air cleaner 3 and fuel supplied from a fuel supply device (not shown) to the engine main body 1, and 4 is an exhaust passage. A filter member 5 is provided in the exhaust passage 4 to collect particulate components in the exhaust gas. The filter member 5 has a honeycomb-shaped base made of ceramic such as cordierite, whose ends are alternately packed, so that when the exhaust gas flows through minute pores in the base, particulate components in the exhaust gas are filtered out. It is made of a monolith-type ceramic filter that collects
上記フイルター部材５の上流の排気通路４には
フイルター部材５の目詰まり解消用の加熱装置と
してのバーナ装置６が設けられている。該バーナ
装置６は、吸気系の燃料供給装置とは別に設けた
燃料ポンプ７および空気ポンプ８に接続され、作
動時に燃料と空気とを混合して噴射するとともに
着火ヒータ９にて着火する構造としている。 A burner device 6 as a heating device for eliminating clogging of the filter member 5 is provided in the exhaust passage 4 upstream of the filter member 5 . The burner device 6 is connected to a fuel pump 7 and an air pump 8 that are provided separately from the fuel supply device of the intake system, and has a structure in which when activated, the burner device 6 mixes and injects fuel and air and ignites it with an ignition heater 9. There is.
また、バーナ装置６の上流の排気通路４と吸気
通路２とを連通する排気還流通路として第１、第
２の各排気還流通路１１，１２が設けられ、排気
還流量調節用の制御バルブとして第１、第２の各
制御バルブ１３，１４が上記各排気還流通路１
１，１２に設けられている。そして制御装置によ
り、バーナ装置作動時に排気還流量を増大させる
ように制御バルブが作動され、具体的には、エン
ジンの運転状態に応じて上記第１制御バルブ１３
が開閉制御される一方、バーナ装置６の作動時に
上記第２制御バルブ１４が開かれて排気還流を増
大させるようになつている。上記の第１および第
２の排気還流通路１１，１２は、排気通路４に接
続された排気還流通路集合部１０から二叉状に分
岐し、それぞれ吸気通路２に接続されている。ま
た、第１および第２の各制御バルブ１３，１４
は、例えばダイヤフラム式のアクチユエータ１３
ａ，１４ａとこれに連動する弁体１３ｂ，１４ｂ
とで構成される。上記アクチユエータ１３ａ，１
４ａは、膜板にて画成された定圧室と圧力可変室
とを有し、圧力可変室が減圧されたとき弁体１３
ｂ，１４ｂを開くようにしている。この各アクチ
ユエータ１３ａ，１４ａの圧力可変室は、負圧導
入通路１５，１６および該各通路１５，１６中に
設けたソレノイド弁１７，１８を介してバキユー
ムポンプ１９に接続されている。 Further, first and second exhaust recirculation passages 11 and 12 are provided as exhaust recirculation passages that communicate the exhaust passage 4 upstream of the burner device 6 and the intake passage 2, and a second exhaust recirculation passage 11 and 12 is provided as a control valve for adjusting the amount of exhaust gas recirculation. 1, each of the second control valves 13 and 14 is connected to each of the exhaust gas recirculation passages 1
1 and 12. Then, the control device operates the control valve so as to increase the amount of exhaust gas recirculation when the burner device is operated, and specifically, the first control valve 13 is operated according to the operating state of the engine.
is controlled to open and close, while the second control valve 14 is opened when the burner device 6 is in operation to increase exhaust gas recirculation. The first and second exhaust gas recirculation passages 11 and 12 branch into two forks from the exhaust gas recirculation passage assembly 10 connected to the exhaust passage 4, and are connected to the intake passage 2, respectively. In addition, each of the first and second control valves 13 and 14
For example, the diaphragm type actuator 13
a, 14a and valve bodies 13b, 14b interlocked therewith
It consists of The actuator 13a, 1
4a has a constant pressure chamber and a variable pressure chamber defined by a membrane plate, and when the variable pressure chamber is depressurized, the valve body 13
b, 14b are opened. The variable pressure chambers of each actuator 13a, 14a are connected to a vacuum pump 19 via negative pressure introduction passages 15, 16 and solenoid valves 17, 18 provided in each passage 15, 16.
前記の制御装置は電気的な制御回路２０にて構
成され、該制御回路２０には、フイルター部材５
の上流の背圧上昇もしくはフイルター部材５の電
気抵抗の変化等によつてフイルター部材５の目詰
まりを検出する目詰まり検出器２１からの信号
と、運転状態を知るためのエンジン回転数検出手
段２２および負荷検出手段２３からの各信号が入
力される。そして、これらの信号に基づき、アイ
ドリング時で且つフイルター部材５の目詰まりが
生じたときにバーナ装置６を作動させるととも
に、前記第１制御バルブ１３はバーナ装置６の作
動時期と関係なくエンジンの運転状態に応じて開
閉制御し、第２制御バルブ１４はバーナ装置６の
作動時に開くように、バーナ装置６の燃料ポンプ
７、空気ポンプ８および着火ヒータ９と、前記各
ソレノイド１７，１８とを制御回路２０にて制御
している。この場合、第２制御バルブ１４が閉じ
ているときの第１制御バルブ１３の開閉制御は、
排気還流装置本来の目的であるNOX低減のための
もので、これによる排気還流率はアイドリング時
で20〜30％程度に設定される。一方、前記第２還
流通路１２および第２制御バルブ１４は排気ガス
温度の上昇を図るためのもので、第１制御バルブ
１３に加えて第２制御バルブ１４も開いたときは
排気還流量が大巾に増大され、例えば排気還流率
が90％前後に増加されるように設定される。 The control device is composed of an electrical control circuit 20, and the control circuit 20 includes a filter member 5.
A signal from a clogging detector 21 that detects clogging of the filter member 5 due to an increase in back pressure upstream of the filter member 5 or a change in electrical resistance of the filter member 5, and an engine rotation speed detecting means 22 that detects the operating state. and each signal from the load detection means 23 are input. Based on these signals, the burner device 6 is operated during idling and when the filter member 5 is clogged, and the first control valve 13 is operated to control the operation of the engine regardless of the operating timing of the burner device 6. The second control valve 14 controls the fuel pump 7, air pump 8, and ignition heater 9 of the burner device 6, as well as the solenoids 17 and 18, so as to open and close according to the state, and the second control valve 14 opens when the burner device 6 is activated. It is controlled by a circuit 20. In this case, the opening/closing control of the first control valve 13 when the second control valve 14 is closed is as follows:
The original purpose of the exhaust gas recirculation system is to reduce NOx , and the exhaust gas recirculation rate is set at around 20-30% during idling. On the other hand, the second recirculation passage 12 and the second control valve 14 are intended to increase the exhaust gas temperature, and when the second control valve 14 is opened in addition to the first control valve 13, the amount of exhaust recirculation becomes large. For example, the exhaust gas recirculation rate is set to be increased to around 90%.
当実施例ではさらに、吸気通路２における各排
気還流通路１１，１２の開口部分より上流に吸気
絞り弁２５を設けるとともに、排気通路４におけ
る排気還流路集合部１０の開口部分とバーナ装置
６との間に排気絞り弁２６を設け、バーナ装置６
の作動時に、該各絞り弁２５，２６も前記制御回
路２０により制御されて開度が絞られるようにし
ている。これら絞り弁２５，２６は、第２制御バ
ルブ１４が開かれるときの排気還流増量作用を助
勢するもので、必要にじて設けておけばよい。ま
た、当実施例において前記制御回路２０は、バー
ナ作動時のほかに、減速時にも、前記両制御バル
ブ１３，１４を開くとともに前記両絞り弁２５，
２６の開度を絞るように制御する構成としてあ
る。減速の検出は、前記エンジン回転数検出手段
２２およびエンジン負荷検出手段２３からの信号
に基づき、エンジン負荷が設定値以下で且つエン
ジン回転数が設定値以上となることの検出によつ
て行なわれる。 In this embodiment, an intake throttle valve 25 is further provided upstream of the openings of the exhaust gas recirculation passages 11 and 12 in the intake passage 2, and the openings of the exhaust gas recirculation passage gathering portion 10 in the exhaust passage 4 are connected to the burner device 6. An exhaust throttle valve 26 is provided between the burner device 6
During operation, each throttle valve 25, 26 is also controlled by the control circuit 20 to narrow the opening degree. These throttle valves 25 and 26 assist in increasing the amount of exhaust gas recirculation when the second control valve 14 is opened, and may be provided as necessary. In addition, in this embodiment, the control circuit 20 opens both the control valves 13 and 14 and opens both the throttle valves 25 and 14 during deceleration as well as during burner operation.
The configuration is such that control is performed to narrow down the opening degree of 26. Detection of deceleration is performed based on signals from the engine speed detection means 22 and engine load detection means 23 by detecting that the engine load is below a set value and the engine speed is above a set value.
この排気浄化装置の作用を次に説明する。 The operation of this exhaust gas purification device will be explained next.
排気ガス中のカーボン等の微粒子成分は前記フ
イルター部材５に捕集され、バーナ装置６の作動
時および排気ガス温度自体がカーボン等を燃焼さ
せるに足るだけ高くなつたときを除き、運転が継
続されるに伴いフイルター部材５に微粒子成分が
蓄積される。一方、排気還流系では、バーナ装置
６作動時等を除く平常の運転状態にあるとき、前
記第２制御バルブ１４が閉じられ、第１制御バル
ブ１３が運転状態に応じて前記制御回路２０によ
り開閉制御され、これによつてNOX低減のために
必要な量だけ排気ガスが第１排気還流通路１１か
ら吸気通路２に還流される。 Particulate components such as carbon in the exhaust gas are collected by the filter member 5, and operation is continued except when the burner device 6 is activated or when the exhaust gas temperature itself becomes high enough to burn carbon etc. As the filter member 5 accumulates, particulate components accumulate. On the other hand, in the exhaust gas recirculation system, in a normal operating state except when the burner device 6 is in operation, the second control valve 14 is closed, and the first control valve 13 is opened and closed by the control circuit 20 depending on the operating state. As a result, exhaust gas is recirculated from the first exhaust gas recirculation passage 11 to the intake passage 2 in an amount necessary for reducing NOx .
フイルター部材５が微粒子成分の蓄積によつて
目詰まりし、且つ、アイドリング時にあることが
検出されたときは、前記制御回路２０からの信号
により前記バーナ装置６が作動し、排気ガスが加
熱されてフイルター部材５に付着した微粒子が燃
焼する。この際、バーナ装置６の作動と同時に、
前記第２制御バルブ１４が開かれ、第１、第２の
両排気通路１１，１２からの多量の排気ガスが吸
気系に還流される。デイーゼルエンジンにあつて
は、元来、アイドリング時の空気過剰率が大きい
ため、排気ガス還流率を90％前後にまで高めても
燃焼に悪影響を及ぼさない。かくして、排気ガス
の熱量が吸気系に還流され、これに伴つて排気ガ
スの温度が引上げられ、その分だけ、前記バーナ
装置６において、カーボン等を燃焼させるに必要
な温度まで排気ガスを加熱するに要する燃料が少
なくてすむことになる。 When it is detected that the filter member 5 is clogged due to accumulation of particulate components and is idling, the burner device 6 is activated by a signal from the control circuit 20 to heat the exhaust gas. The particulates adhering to the filter member 5 are burned. At this time, simultaneously with the operation of the burner device 6,
The second control valve 14 is opened, and a large amount of exhaust gas from both the first and second exhaust passages 11, 12 is returned to the intake system. Diesel engines inherently have a large excess air ratio during idling, so even if the exhaust gas recirculation ratio is increased to around 90%, combustion will not be adversely affected. In this way, the amount of heat in the exhaust gas is returned to the intake system, and the temperature of the exhaust gas is raised accordingly, and the burner device 6 heats the exhaust gas by that amount to the temperature necessary to burn carbon, etc. This means that less fuel is required.
また、当実施例では、減速時にも前記第２制御
バルブ１４を開き、排気ガス還流量を増大させる
ように制御しているため、減速時のフイルター部
材５の保温効果も高められる。すなわち、デイー
ゼルエンジンではとくに、減速時に燃料カツトさ
れて殆ど空気のみがエンジン本体１に送られるこ
とにより、フイルター部材５が空気が冷却されて
温度低下し易い。フイルター部材５には、カーボ
ン等の捕集のほかに、蓄積作用によりHC，CO等
を燃焼させる機能も期待されているので、フイル
ター部材５の温度が低下すると、上記のHC，CO
等の燃焼作用が阻害され、また、前述の如きカー
ボン等の燃焼のための温度上昇にも多くの熱量が
必要となる。そこで、減速時にも、バーナ装置作
動時と同様に排気還流量を増大させ、フイルター
部材５の温度低下を抑制しているのである。 Further, in this embodiment, the second control valve 14 is opened even during deceleration, and the exhaust gas recirculation amount is controlled to be increased, so that the heat retention effect of the filter member 5 during deceleration is also enhanced. That is, especially in a diesel engine, fuel is cut off during deceleration and almost only air is sent to the engine body 1, so that the temperature of the filter member 5 tends to drop as the air is cooled. In addition to collecting carbon, the filter member 5 is expected to have the function of burning HC, CO, etc. due to the accumulation effect, so when the temperature of the filter member 5 decreases, the above-mentioned HC, CO, etc.
In addition, a large amount of heat is required to raise the temperature for combustion of carbon, etc., as described above. Therefore, even during deceleration, the exhaust gas recirculation amount is increased in the same way as when the burner device is in operation, thereby suppressing the temperature drop in the filter member 5.
なお、フイルター部材５は前述のセラミツクフ
イルターに限らず、グラスウールやスチールネツ
クを用いたフイルターであつてもよい。 Note that the filter member 5 is not limited to the above-mentioned ceramic filter, but may be a filter using glass wool or steel neck.
以上説明したように、本考案の排気浄化装置は
アイドリング時で且つフイルター部材の目詰まり
が生じたとき目詰まり解消用加熱装置を作動させ
るとともに、排気還流通路と、該通路に設けた制
御バルブと、これらを制御する制御装置とで、加
熱装置作動時には制御バルブを開き、多量に排気
還流させるようにしているため、加熱装置作動時
に、排気の熱量が吸気系に還流されて排気ガス温
度が上昇することにより、加熱装置において消費
されるエネルギーを大巾に節減することができ、
経済性を格段に高めるものである。 As explained above, the exhaust purification device of the present invention operates the clogging eliminating heating device when the filter member is idling and when the filter member is clogged, and also operates the exhaust gas recirculation passage and the control valve provided in the passage. When the heating device is activated, the control valve is opened to allow a large amount of exhaust gas to be recirculated, so when the heating device is activated, the amount of heat from the exhaust gas is recirculated to the intake system, raising the exhaust gas temperature. By doing so, the energy consumed in the heating device can be greatly reduced,
This greatly improves economic efficiency.
図は本考案装置の実施例を示す概略図である。
１……デイーゼルエンジン本体、２……吸気通
路、４……排気通路、５……フイルター部材、６
……バーナ装置、１１……第１排気還流通路、１
２……第２排気還流通路、１３……第１制御バル
ブ、１４……第２制御バルブ、２０……制御回
路。
The figure is a schematic diagram showing an embodiment of the device of the present invention. 1... Diesel engine body, 2... Intake passage, 4... Exhaust passage, 5... Filter member, 6
... Burner device, 11 ... First exhaust gas recirculation passage, 1
2...Second exhaust gas recirculation passage, 13...First control valve, 14...Second control valve, 20...Control circuit.
Claims (1)
集するフイルター部材を設けるとともに、フイル
ター部材上流の排気通路にフイルター部材の目詰
まり解消用加熱装置を設け、フイルター部材の目
詰まりを検出して加熱装置を作動させるデイーゼ
ルエンジンの排気浄化装置において、加熱装置上
流の排気通路と吸気通路とを連通する排気還流通
路と、該排気還流通路に設けた排気還流量調節用
の制御バルブと、加熱装置の作動時に排気還流量
を増大させるように上記制御バルブを作動させる
制御装置とを具備したことを特徴とするデイーゼ
ルエンジンの排気浄化装置。 A filter member is provided in the exhaust passage of the engine to collect particulate components in the exhaust gas, and a heating device for eliminating clogging of the filter member is provided in the exhaust passage upstream of the filter member, and the heating device detects clogging of the filter member. In an exhaust gas purification system for a diesel engine that operates, there is provided an exhaust gas recirculation passage that communicates the exhaust passage and the intake passage upstream of the heating device, a control valve for adjusting the amount of exhaust gas recirculation provided in the exhaust gas recirculation passage, and the operation of the heating device. 1. An exhaust purification device for a diesel engine, comprising: a control device that operates the control valve so as to increase the amount of exhaust gas recirculated at times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14620681U JPS5848914U (en) | 1981-09-30 | 1981-09-30 | Diesel engine exhaust purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14620681U JPS5848914U (en) | 1981-09-30 | 1981-09-30 | Diesel engine exhaust purification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5848914U JPS5848914U (en) | 1983-04-02 |
| JPS6132122Y2 true JPS6132122Y2 (en) | 1986-09-18 |
Family
ID=29939119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14620681U Granted JPS5848914U (en) | 1981-09-30 | 1981-09-30 | Diesel engine exhaust purification device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5848914U (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58183809A (en) * | 1982-04-21 | 1983-10-27 | Toyota Motor Corp | Judging of regenerating time of collecting unit for particles in diesel engine |
| JPS59101519A (en) * | 1982-12-01 | 1984-06-12 | Toyota Motor Corp | Diesel particulate eliminator |
| JPS60216018A (en) * | 1984-04-09 | 1985-10-29 | Mitsubishi Motors Corp | Regenerating device for diesel particulate trap member |
| JPS60206922A (en) * | 1984-03-31 | 1985-10-18 | Mitsubishi Motors Corp | Regeneration timing controller for diesel particulate oxidizer |
-
1981
- 1981-09-30 JP JP14620681U patent/JPS5848914U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5848914U (en) | 1983-04-02 |
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