JPS5851210A - Exhaust gas processing device in engine controlled number of cylinders - Google Patents
Exhaust gas processing device in engine controlled number of cylindersInfo
- Publication number
- JPS5851210A JPS5851210A JP14980181A JP14980181A JPS5851210A JP S5851210 A JPS5851210 A JP S5851210A JP 14980181 A JP14980181 A JP 14980181A JP 14980181 A JP14980181 A JP 14980181A JP S5851210 A JPS5851210 A JP S5851210A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- cylinders
- exhaust
- passage
- exhaust gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
- F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features having two or more purifying devices arranged in parallel
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/107—More than one exhaust manifold or exhaust collector
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、エンジン軽負荷域で一部気筒の作動を休止
させて部分気筒運転を行なう気筒数制御エンジンの排気
処理装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust gas treatment device for an engine with cylinder number control, which performs partial cylinder operation by suspending operation of some cylinders in a light engine load range.
一般に、エンジンを昼い負荷状態で運転すると燃費が良
好になる傾向があシ、このため多気筒エンジンにおいて
、エンジン負荷の小さいときに一部気筒への燃料の供給
をカットして作動を休止させ、この分たけ残シのＷ動側
気筒の負荷を相対的に高め、全体とし、て軽負荷領域の
燃費を改善するようにした気筒砂制御エンジンが考えら
れた。In general, fuel efficiency tends to improve when an engine is operated under daytime load conditions.For this reason, in multi-cylinder engines, fuel supply to some cylinders is cut to stop operation when the engine load is light. A cylinder sand control engine has been devised in which the load on the remaining W-driving side cylinder is relatively increased by this amount, thereby improving fuel efficiency in the light load range as a whole.
本出願人が先に提案したこの種のエンジン（特願昭５６
−１２９２７２号）では、第１図に示すように、休止側
の気筒÷１−＋３と稼動（ｆｉｌ＋の気筒＋４〜豐６に
対応して吸気通路２が絞弁１の下流にて休止側吸気通路
３と砂＃Ｉ側吸気通路４とに分割され、排気通路７も触
媒５を介装Ｌ７た排気処理装置６の上流側まで休止側排
気通路８と稼動側排気通路９とに分割されている。This type of engine was proposed earlier by the present applicant (Japanese Patent Application No. 1983)
-129272), as shown in FIG. It is divided into a passage 3 and an intake passage 4 on the sand #I side, and the exhaust passage 7 is also divided into an idle side exhaust passage 8 and an operating side exhaust passage 9 upstream of the exhaust treatment device 6 in which a catalyst 5 is interposed L7. There is.
そして、エンジンの軽負荷域で休止側気筒すｌ〜≠３へ
の燃料をカットするときには、休止側吸気通路３の上流
部に介装された遮断弁ＩＯを閉じると同時に、エアフロ
ーメータ１１および絞弁ｌをバイパスする新気供給通路
夏２を開き、これらの上流側の新気を休止何気＠＋１〜
≠３へ十分に供給するようにして部分気筒運転を行なっ
ているこれによシ、休止側気筒＋１〜≠３におけるボン
ビングロスを低減し、一層の燃費の改善を図っている。When cutting fuel to the idle cylinders 1~≠3 in the light engine load range, the shutoff valve IO installed in the upstream part of the idle side intake passage 3 is closed, and at the same time, the air flow meter 11 and the throttle valve are closed. Open the fresh air supply passage summer 2 to bypass valve l, and suspend the fresh air on these upstream sides.
Partial cylinder operation is performed by supplying sufficient fuel to cylinders ≠3, thereby reducing bombing loss in the idle cylinders +1 to ≠3, thereby further improving fuel efficiency.
ところで、このエンジンにあっては１通當の場合（全気
筒運転時）に休止側気筒φ１〜＝＃−３および稼動側気
筒＋４〜≠６とも同様に燃焼した排気ガスを排出するが
、部分気筒運転時には稼動側気筒＋４〜す６から同じく
燃焼カスが、休止側気筒＋１−−す３刀）らは比較的低
温（はぼ常温）の新気がそのまま排出される。By the way, in this engine, in the case of one exhaust gas (when all cylinders are operated), the idle cylinder φ1~=#-3 and the active cylinder +4~≠6 exhaust the burned exhaust gas in the same way, but only a portion of the exhaust gas is exhausted. When the cylinders are in operation, combustion scum is discharged from the active cylinders +4 to 6, and fresh air at a relatively low temperature (almost room temperature) is discharged from the idle cylinders +1 to 6.
そして、この低温の新気は、休止側気筒＋１〜≠３や休
止側吸気通路３の壁面に付着１〜でいるガソリンの気化
した未燃）ｉＣ（炭化水鶏）等の有害成分を伴ない、前
述の燃焼ガスと共に排気通路８゜９下流の触媒５へと導
ひかれる。This low-temperature fresh air is accompanied by harmful components such as unburned (unburned) gasoline that is attached to the walls of the idle side cylinders +1~≠3 and the idle side intake passage 3, and Together with the aforementioned combustion gas, it is led to the catalyst 5 downstream of the exhaust passage 8°9.
このため、稼動側気筒＋４〜＋６からの箭温排気は良く
浄化さ才しるが、届気の流入する部分の触媒５では温度
が低下して反応が４ＪＪｒ ｆｆｆｌＪされてしすい、
その結果有害成分が十分に低減されずに大気に放出され
るという問題があった。For this reason, the hot exhaust gas from the active cylinders +4 to +6 is well purified, but the temperature of the catalyst 5, where the air flows in, decreases and the reaction is reduced by 4JJr ffflJ.
As a result, there is a problem in that harmful components are not sufficiently reduced and are released into the atmosphere.
この発明は、このＪ、９な従来の問題点に着目しでかさ
れたもので、休止側排気通路と稼動［＋１１排気通路に
対応して触媒を分割し、稼動側気筒からの燃焼排気を触
媒で反応、＃化すると共に、その高温排気と、触媒での
反応熱によって休止側気筒からの新気の温度を高め、さ
らにこの下流側に酸化触媒を設置することによシ、有害
成分を除去し。This invention was developed by focusing on the problems of the conventional J. In addition to reacting with the catalyst and converting it into #, the temperature of the fresh air from the idle cylinder is increased by the high temperature exhaust gas and the reaction heat in the catalyst, and by installing an oxidation catalyst downstream of this, harmful components are removed. Remove.
清浄排気を得るようにした排気処理装置の提供を目的と
する。An object of the present invention is to provide an exhaust treatment device that obtains clean exhaust gas.
以下１本発明の実施例を図面に基づいて説明する。第２
図で、気筒＋１〜＋３はエンジンの軽負 ゛荷載
で燃料の供給が遮断され１２の通路よシ新気のみが供給
される休止側気筒であシ、これに対して気筒＋４〜す６
は常時燃料と新気が供給され作動を継続する稼動側気筒
である。An embodiment of the present invention will be described below based on the drawings. Second
In the figure, cylinders +1 to +3 are cylinders on the idle side, where the fuel supply is cut off when the engine is lightly loaded and only fresh air is supplied through passage 12, whereas cylinders +4 to +6
is a working cylinder that is constantly supplied with fuel and fresh air and continues to operate.
この休止側気筒＋ｌ−＋３と（２）動側気筒＋４〜＋６
に接続する排気通路７は、これらに対応して触媒５の直
前まで休止側排気通路８と稼動側排気通路９とに分割さ
れる。These cylinders on the idle side +l-+3 and (2) cylinders on the active side +4 to +6
Correspondingly, the exhaust passage 7 connected to the exhaust passage 7 is divided into a rest-side exhaust passage 8 and an active-side exhaust passage 9 up to just before the catalyst 5.
そして、この休止１１１０排気通路８と稼動１ｉ１１１
排気通路９に対応して同じく触媒５が分割される。And this pause 1110 exhaust passage 8 and operation 1i111
Similarly, the catalyst 5 is divided corresponding to the exhaust passage 9.
具体的には、この触媒５ば、両排気通路８，９下流端に
接続するケーシング１３に介装され、これと一体的に取
付けられた仕切板１４によ多分割される。Specifically, the catalyst 5 is interposed in a casing 13 connected to the downstream ends of both exhaust passages 8 and 9, and is divided into multiple parts by a partition plate 14 integrally attached thereto.
また、この触媒５としては１例えば三元触媒が用いられ
る。Further, as the catalyst 5, a three-way catalyst, for example, is used.
そして、この触媒５の下流側に１合流通路１５を介して
、別の酸化触媒１６／：設けられる。Another oxidation catalyst 16/: is provided on the downstream side of this catalyst 5 via one merging passage 15.
この酸化触媒１６１１．ｌ：、やはシケース１７に収装
され、一つで良い。そして、その下流は図示しないマフ
ラーを介して大気に開口される。This oxidation catalyst 1611. L:, and are housed in case 17, and only one is enough. The downstream side thereof is opened to the atmosphere via a muffler (not shown).
なお、２０は部分気筒運転時に新気供給通路１２を開く
バイパス升、２１はエアフローメータ１１からの吸入空
気量信号と図示しない回転数センサからの回転数信号に
もとづいて燃料噴射量を演算する燃料噴射制御回路であ
り、また噴射量は触媒５の上流に設けた酸素センサ２２
の出力にもとづいて理論空燃比の混合気が得られるよう
にフィードバック制御される。Note that 20 is a bypass cell that opens the fresh air supply passage 12 during partial cylinder operation, and 21 is a fuel that calculates the fuel injection amount based on the intake air amount signal from the air flow meter 11 and the rotation speed signal from a rotation speed sensor (not shown). This is an injection control circuit, and the injection amount is determined by an oxygen sensor 22 installed upstream of the catalyst 5.
Feedback control is performed based on the output of the air-fuel mixture to obtain a mixture at a stoichiometric air-fuel ratio.
このような構成において１部分気筒運転時に。In such a configuration, during one-part cylinder operation.
稼動側気筒す４〜＋６から排出される燃焼排気と。Combustion exhaust gas discharged from operating cylinders 4 to +6.
および休止側気筒＋ １−４３から排出される新気は、
それぞれ稼動側排気通路９と休止側排気通路８を介して
、２分割された触媒５の当該側へ導入される。And the fresh air discharged from the cylinder +1-43 on the idle side is:
The exhaust gases are introduced into the respective sides of the divided catalyst 5 through the active side exhaust passage 9 and the idle side exhaust passage 8, respectively.
これによシ、稼動側気筒す４〜＋６からの燃焼排気は、
触媒５と良く反応し、十分に浄化されるのである。そし
て、このときかなシの反応熱を発生する。Accordingly, the combustion exhaust from the working cylinders 4 to +6 is
It reacts well with the catalyst 5 and is sufficiently purified. At this time, reaction heat of Kana is generated.
したがって、休止側気筒Φｌ〜す３がらの新気は、この
触媒５を通る際に、高温の排気と、その反応熱を受けて
熱せられる。そして、さらにこの高温の排気と混流した
後、下流側に設けた酸化触媒１６へと導ひかれるのであ
る。Therefore, when the fresh air from the idle cylinders Φl to S3 passes through the catalyst 5, it is heated by the high temperature exhaust gas and the reaction heat thereof. Then, after further mixing with this high-temperature exhaust gas, it is guided to the oxidation catalyst 16 provided on the downstream side.
このため、新気の温度が十分に高められ、その結果酸化
触媒１６での反応、浄化が著しく促進される。このよう
にして、稼動側気筒＋４〜≠６からの排気浄化はもちろ
ん、休止側気筒÷１−１３の新気と共に排出される未燃
Ｈｅ等の有害成分を大幅に低減することができるのであ
シ、非虎に良好な排気組成を得ることができる。Therefore, the temperature of the fresh air is sufficiently increased, and as a result, the reaction and purification at the oxidation catalyst 16 are significantly promoted. In this way, it is possible to not only purify the exhaust gas from the active cylinders +4 to ≠6, but also to significantly reduce harmful components such as unburned He that are emitted along with the fresh air from the idle cylinders divided by 1-13. It is possible to obtain a good exhaust composition in a non-tiger manner.
なお、全気筒運転時には、各気筒＋ｌ−豐６からの排気
を上流側の触媒５で浄化でき、さらには下流１１１ｕの
酸化触媒１６によって浄比が確実になる。In addition, during all-cylinder operation, the exhaust gas from each cylinder +1-6 can be purified by the catalyst 5 on the upstream side, and the purification ratio can be ensured by the oxidation catalyst 16 on the downstream side 111u.
以上説明した通り１本発明によれば、休止側排気通路と
稼動側排気通路に対応して触５ ｋ分割すると共に、こ
れらの下流側にさらに酸化触媒を設け、部分気筒運転時
に、休止側気筒からの新気を、稼動側気筒からの高温の
排気と、前記触媒での反応熱とによシ加熱してから寂化
触媒に導びくようにしたので、有害排気成分を十分に除
去することができ、清浄な排気を得ることができるとい
う効果がある。As explained above, according to the present invention, the exhaust passage on the idle side and the exhaust passage on the active side are divided into 5k parts, and an oxidation catalyst is further provided on the downstream side of these, so that during partial cylinder operation, the exhaust passage on the idle side is divided into 5 k parts. Since the fresh air from the engine is heated by the high-temperature exhaust gas from the operating cylinder and the heat of reaction at the catalyst before being led to the catalytic converter, harmful exhaust components can be sufficiently removed. This has the effect of making it possible to obtain clean exhaust gas.
第１図は従来装置の構成断面図、第２図は本発明の一実
施例を示す構成断面図である。
５・・・触媒、８・・・休止側排気通路、９・・・稼動
側排気通路、１２・・・新気供給通路１．１３・・・ケ
ーシング。
１４・・・仕切板、１５・・・合流通路、１６・・・酸
化触媒。
１７・・・ケース、２２・・・酸素センサ。
７−
第１図FIG. 1 is a sectional view of a conventional device, and FIG. 2 is a sectional view of an embodiment of the present invention. 5...Catalyst, 8...Stopping side exhaust passage, 9...Working side exhaust passage, 12...Fresh air supply passage 1.13...Casing. 14... Partition plate, 15... Merging passage, 16... Oxidation catalyst. 17...Case, 22...Oxygen sensor. 7- Figure 1
Claims (1)
供給される休止側気筒と、常時燃料と新気が供給され作
動を継続する稼動側気筒とを備えた気筒数制御エンジン
において、排気通路を休止側気筒と稼動側気筒に対応し
て触媒の直前まで分割し、同じくこの触媒を休止側排気
通路と稼動側排気通路に対応して分割すると共に、この
触媒下流に酸化触媒を設けたことを特徴とする気筒数制
御エンジンの排気処理装置。In a cylinder number control engine that is equipped with a dormant cylinder to which fuel supply is cut off and only fresh air is supplied in the light load range of the engine, and an active cylinder to which fuel and fresh air are constantly supplied and continues operation, The passage is divided up to just before the catalyst corresponding to the idle cylinder and the active cylinder, and the catalyst is also divided into the idle exhaust passage and the active exhaust passage, and an oxidation catalyst is installed downstream of this catalyst. An exhaust treatment device for an engine with a controlled number of cylinders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14980181A JPS5851210A (en) | 1981-09-22 | 1981-09-22 | Exhaust gas processing device in engine controlled number of cylinders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14980181A JPS5851210A (en) | 1981-09-22 | 1981-09-22 | Exhaust gas processing device in engine controlled number of cylinders |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5851210A true JPS5851210A (en) | 1983-03-25 |
Family
ID=15483006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14980181A Pending JPS5851210A (en) | 1981-09-22 | 1981-09-22 | Exhaust gas processing device in engine controlled number of cylinders |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5851210A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004001210A1 (en) * | 2002-06-21 | 2003-12-31 | Lotus Cars Limited | De-activation of combustion chambers in a multi-combustion chamber internal combustion engine |
| EP1524031A1 (en) * | 2003-10-17 | 2005-04-20 | Ngk Insulators, Ltd. | Honeycomb structure and catalytic converter |
| FR2929986A1 (en) * | 2008-04-10 | 2009-10-16 | Inst Francais Du Petrole | Exhaust gas pollutant e.g. unburnt hydrocarbon, depolluting device for e.g. petrol type spark ignition internal combustion engine of motor vehicle, has outlets each connected to inlet of depollution treatment body in different regions |
-
1981
- 1981-09-22 JP JP14980181A patent/JPS5851210A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004001210A1 (en) * | 2002-06-21 | 2003-12-31 | Lotus Cars Limited | De-activation of combustion chambers in a multi-combustion chamber internal combustion engine |
| EP1524031A1 (en) * | 2003-10-17 | 2005-04-20 | Ngk Insulators, Ltd. | Honeycomb structure and catalytic converter |
| US7438868B2 (en) | 2003-10-17 | 2008-10-21 | Ngk Insulators, Ltd. | Honeycomb structure and catalytic converter |
| FR2929986A1 (en) * | 2008-04-10 | 2009-10-16 | Inst Francais Du Petrole | Exhaust gas pollutant e.g. unburnt hydrocarbon, depolluting device for e.g. petrol type spark ignition internal combustion engine of motor vehicle, has outlets each connected to inlet of depollution treatment body in different regions |
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