JPS58119950A - Exhaust pupifying unit of internal-combustion enging for car - Google Patents
Exhaust pupifying unit of internal-combustion enging for carInfo
- Publication number
- JPS58119950A JPS58119950A JP57000622A JP62282A JPS58119950A JP S58119950 A JPS58119950 A JP S58119950A JP 57000622 A JP57000622 A JP 57000622A JP 62282 A JP62282 A JP 62282A JP S58119950 A JPS58119950 A JP S58119950A
- Authority
- JP
- Japan
- Prior art keywords
- engine
- air
- exhaust
- water temperature
- secondary air
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 9
- 239000000446 fuel Substances 0.000 claims abstract description 29
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- 239000003054 catalyst Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000000498 cooling water Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
-
- 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
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は自動車用内燃機関で三元触媒を使用する排気
ガス浄化装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust gas purification device using a three-way catalyst in an internal combustion engine for an automobile.
自動車用内燃機関の排気ガスを浄化するために、空燃比
制御を行う装置としては、例えば特開昭４９−１１７＄
３８号がある。これはガンリンエンジンの燃料消費量と
有害排気成分（１０、００。For example, a device for controlling air-fuel ratio in order to purify exhaust gas from an internal combustion engine for automobiles is disclosed in Japanese Patent Application Laid-open No. 117-1983.
There is No. 38. This is the fuel consumption of the Ganlin engine and harmful exhaust components (10,00.
、ＮＯＸ等）を同時に減らすために、ジルコニウム管を
使って排気中の酸素濃度を検出し、これを燃料供給シス
テムへフィードバックして混合比をほぼ理論混合比に制
御するものである。, NOx, etc.), a zirconium tube is used to detect the oxygen concentration in the exhaust gas, and this is fed back to the fuel supply system to control the mixture ratio to approximately the stoichiometric mixture ratio.
しかしながら従来のこの種装置は、常に混合比を理論混
合比付近に保つようなシステム範なっているため、機関
の冷機運転時における燃料供給量の気筒間におけるばら
つきが大きく、かつ霧化も悪いため機関運転上の安定性
が悪化するという傾向があった。このため機関の冷機運
転時においては、供給空燃比を理論空燃比より濃くしな
けれはならないが、空燃比を濃くすると、三元触媒に入
る排気ガスの空燃比も濃くなる結果、空気量の不足から
三元触媒の酸化反応が十分に行われなくなって有害排気
ガスの量が増大するという問題点があった口
この発明は、このような従来装置の問題点を解決するた
めになされたもので、機関の冷機運転時に、機関温度を
検出して二次空気を三元触媒上流の排気管内に導入する
ことにより、機関冷機時の運転性を向上させると共に排
気ガス中の有害成分を減少させることを目的とするもの
である。However, since conventional devices of this type always maintain the mixture ratio near the stoichiometric mixture ratio, there is a large variation in the amount of fuel supplied between cylinders when the engine is running cold, and the atomization is also poor. There was a tendency for engine operational stability to deteriorate. For this reason, when the engine is running cold, the supplied air-fuel ratio must be made richer than the stoichiometric air-fuel ratio, but when the air-fuel ratio is made richer, the air-fuel ratio of the exhaust gas entering the three-way catalyst also becomes richer, resulting in a shortage of air volume. This invention was made in order to solve these problems of the conventional device. When the engine is running cold, the engine temperature is detected and secondary air is introduced into the exhaust pipe upstream of the three-way catalyst, thereby improving driveability when the engine is running cold and reducing harmful components in the exhaust gas. The purpose is to
以下この発明を図面について説明する。図中１は自動車
用内燃機関の本体、Ｂはその吸気管、８は電子制御気化
器、δａはその燃料制御ソレノイド、８ｂはチ四−クパ
ルプ、８０は紋？）弁、４はエアクリーナ、６は排気管
、６は三元触媒、７は排気管５に設けたＯｓセンサー、
Ｂは機関本体１に設けた水温スイッチ（機関温度検知セ
ンサー）である。The present invention will be explained below with reference to the drawings. In the figure, 1 is the main body of an automobile internal combustion engine, B is its intake pipe, 8 is an electronically controlled carburetor, δa is its fuel control solenoid, 8b is chalk pulp, and 80 is a pattern. ) valve, 4 is an air cleaner, 6 is an exhaust pipe, 6 is a three-way catalyst, 7 is an Os sensor installed in the exhaust pipe 5,
B is a water temperature switch (engine temperature detection sensor) provided in the engine body 1.
第１図はこの発明の第１実施例を示すもので、エアクリ
ーナ番と排気管器とを二次空気供給管９により連通し、
この管９の人口側にリード弁１０およびソレノイド１１
により弁１１ａを介して作動するカッＦパルプＸＳ＊−
設ける・なおＩｇ＆はカットパルプｌｆｉの作動用ダイ
アプラム装置で、この負王室は前記弁１１ａを介して吸
気管３と配管１３により連通する。また前記０．センサ
ー７、水温スイッチ８、弁１１ａのソレノイドｌｌ、お
よび電子制御気化器３の燃料制御ソレノイド８ａとそれ
ぞれ電気的に接続したコントロールユニット１４を設け
、エンジンの冷却水温が所定値（例えば６０°Ｃ）以下
の場合に水温スイッチ８を閉じ、この信号をうけたコン
トロールユニット１４を介してソレノイド８ａに所定の
信号を送ることにより電子制御気化器８の空燃比をチト
→パルプ８ｂに応じてリッチにデユーティ制御、例えば
７０％開き、８０％開じるように制御すると共に、ソレ
ノイド１１に通電して弁１１ａを開き、吸気管２内の負
圧をダイアフラム装置１ｇａ内の負王室に導入してカッ
トパルプ１２を開いてエアクリーナーより排気管５の上
流側に管９を介して二次空気を供給するように構成する
。FIG. 1 shows a first embodiment of the present invention, in which the air cleaner number and the exhaust pipe device are connected through a secondary air supply pipe 9.
A reed valve 10 and a solenoid 11 are provided on the artificial side of this pipe 9.
Kaf pulp XS*- operated via valve 11a by
Further, Ig& is a diaphragm device for operating the cut pulp lfi, and this negative royal line communicates with the intake pipe 3 through the piping 13 via the valve 11a. Also, the above 0. A control unit 14 is provided which is electrically connected to the sensor 7, the water temperature switch 8, the solenoid 11 of the valve 11a, and the fuel control solenoid 8a of the electronically controlled carburetor 3, and controls the engine cooling water temperature to a predetermined value (for example, 60°C). In the following cases, the water temperature switch 8 is closed, and the control unit 14 that receives this signal sends a predetermined signal to the solenoid 8a to change the air-fuel ratio of the electronically controlled carburetor 8 from Tito to Rich duty according to the pulp 8b. For example, the solenoid 11 is energized to open the valve 11a, and the negative pressure in the intake pipe 2 is introduced into the negative chamber in the diaphragm device 1ga to cut pulp. 12 is opened to supply secondary air from the air cleaner to the upstream side of the exhaust pipe 5 via the pipe 9.
またエンジンの冷却水温が所定値（例えば６０℃）を超
えた場合は水温スイッチ８を開くことにヨリ、コントロ
ールユニット１４を介してカットパルプ１２を閉じて二
次空気を遮断すると共に、０ センサー７の信号により
シリンダの燃焼室へ供給される混合気の一次空燃比が理
論空燃比になるように燃料制御ソレノイド８ａにフィー
ドバック信号を送るように構成する。In addition, when the engine cooling water temperature exceeds a predetermined value (for example, 60°C), the water temperature switch 8 is opened, the cut pulp 12 is closed via the control unit 14, and the secondary air is cut off, and the 0 sensor 7 A feedback signal is sent to the fuel control solenoid 8a so that the primary air-fuel ratio of the air-fuel mixture supplied to the combustion chamber of the cylinder becomes the stoichiometric air-fuel ratio in response to the signal.
また第２図はこの発明のｗ１２実施例であり、これは燃
料供給装置としてインジェクター１６を使用し、二次空
気供給装置としてエアポンプ１６を使用し、冷却水温検
出のために水温センサー８／を使用シ、エアポンプ１６
と排気管５との間の二次空気供給管９の途中に二次空気
フン）ｏ−ルバルプ１７を設け、このダイアフラム装置
１フａの負圧室を配管１８に接続したのが、第１図の装
置と異なる点である。なお１８は吸気管２に設けたエア
７０−メータである。FIG. 2 shows a W12 embodiment of the present invention, which uses an injector 16 as a fuel supply device, an air pump 16 as a secondary air supply device, and a water temperature sensor 8/ to detect cooling water temperature. Air pump 16
A secondary air valve 17 is provided in the middle of the secondary air supply pipe 9 between the diaphragm device 1 and the exhaust pipe 5, and the negative pressure chamber of the diaphragm device 1 is connected to the pipe 18. This is different from the device shown in the figure. Note that 18 is an air 70-meter provided in the intake pipe 2.
この場合、機関の冷機運転時には水温センサー８Ｉのｆ
ｆ１４ｔに応じてコントロールユニット１４からインジ
ェクター１５に前もって記憶させである信号を送ること
により濃い空燃比の燃料が供給される。また同時にコン
トロールユニット１４からソレノイド１１に水温に応じ
て記憶させである信号を送ることにより、二次空気コン
トルールパルプ１フを介して排気管す内へ供給する二次
空気を調節することができる◎
また冷却水温が設定温度以上になった場合は、第１実施
例と同様に、二次空気の供給を遮断すると共に、０．セ
ンサー７の信号によりインジェクター１５にフィードバ
ック信号を送り一次空燃比を理論空燃比に制御する。In this case, when the engine is running cold, the water temperature sensor 8I f
By sending a pre-stored signal from the control unit 14 to the injector 15 in response to f14t, fuel with a rich air-fuel ratio is supplied. At the same time, by sending a memorized signal from the control unit 14 to the solenoid 11 according to the water temperature, it is possible to adjust the secondary air supplied into the exhaust pipe via the secondary air control pulp 1f. ◎ If the cooling water temperature exceeds the set temperature, the supply of secondary air is cut off and the temperature is set to 0. Based on the signal from the sensor 7, a feedback signal is sent to the injector 15 to control the primary air-fuel ratio to the stoichiometric air-fuel ratio.
以上説明してきたように、この発明によれば、機関の冷
機運転時に、それを検出して一次空燃比制御を濃化する
と共に、二次空気を三元触媒上流の排気管内に供給する
構成としたため、機関の冷機運転時において導入された
二次空気により、排気ガスの空燃比（二次空燃比）が酸
化反応域に入るため、触媒の温度上昇による転換効率の
向上と相まって、有害排気ガスの増加を防止できると共
に、−次空燃比を濃くすることによって機関の運転性を
向上できるという効果が得られる。As explained above, according to the present invention, when the engine is running cold, it is detected and the primary air-fuel ratio control is enriched, and the secondary air is supplied into the exhaust pipe upstream of the three-way catalyst. Therefore, due to the secondary air introduced during cold engine operation, the air-fuel ratio of exhaust gas (secondary air-fuel ratio) enters the oxidation reaction region, and this, combined with the improvement of conversion efficiency due to the temperature rise of the catalyst, reduces harmful exhaust gas. In addition to being able to prevent an increase in the air-fuel ratio, the drivability of the engine can be improved by increasing the negative air-fuel ratio.
第１図は本発明の実施例を示す説明図、第２図は他の実
施例を示す説明図である。
１・・・自動車用内燃機関の本体、
２・・・吸気管、 ８・・・電子制御気化器
、８ａ・・・燃料制御ソレノイド、
８ｂ・・・チョークパルプ、８０・・・絞り弁、４・・
・エアクリーナ、 ５・・・排気管、６・・・三元
触媒、 ７・・・０．センサー、８・・・水温ス
イッチ（機関温度検知センサー）、８１・・・水温セン
サー、 ９・・・二次空気供給管、１０・・・リード
弁、 １１・・・ソレノイド、１１ａ・・・弁、
１１１・・・、カットパルプ、１２ａ・・・ダイアフラ
ム装置、
１８・・・配管、 １４・・・コントルール
ユニット、
１５・・・インジェクター、１６・・・エアポンプ、ｌ
フ・・・二次空気フントロールパルプ、１８・・・エア
７０−メータ。FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing another embodiment. DESCRIPTION OF SYMBOLS 1... Body of an internal combustion engine for an automobile, 2... Intake pipe, 8... Electronically controlled carburetor, 8a... Fuel control solenoid, 8b... Choke pulp, 80... Throttle valve, 4・・・
・Air cleaner, 5...Exhaust pipe, 6...Three-way catalyst, 7...0. Sensor, 8... Water temperature switch (engine temperature detection sensor), 81... Water temperature sensor, 9... Secondary air supply pipe, 10... Reed valve, 11... Solenoid, 11a... Valve ,
111... Cut pulp, 12a... Diaphragm device, 18... Piping, 14... Control unit, 15... Injector, 16... Air pump, l
F...Secondary Air Funtrol Pulp, 18...Air 70-meter.
Claims (1)
センサーにより理論混合比に制御するようにした自動車
用内燃機関の排気ガス浄化装置において、機関の温度を
検知する機関温度検知センサーを設け、この機関温度検
知センサーの信号により機関の冷機運転時には混合気を
濃化すると共に二次空気を三元触媒の上流側の排気管中
に導入したことを特徴とする自動車用内燃機関の排気ガ
ス浄化装置。1 A three-way catalyst is installed in the exhaust path, and the air-fuel mixture in the combustion chamber is
In an exhaust gas purification system for an automobile internal combustion engine that uses a sensor to control the mixture ratio to a stoichiometric ratio, an engine temperature detection sensor is installed to detect the engine temperature, and the signal from this engine temperature detection sensor is used to control the air-fuel mixture when the engine is running cold. An exhaust gas purification device for an internal combustion engine for an automobile, characterized in that secondary air is concentrated and introduced into an exhaust pipe on the upstream side of a three-way catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57000622A JPS58119950A (en) | 1982-01-07 | 1982-01-07 | Exhaust pupifying unit of internal-combustion enging for car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57000622A JPS58119950A (en) | 1982-01-07 | 1982-01-07 | Exhaust pupifying unit of internal-combustion enging for car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58119950A true JPS58119950A (en) | 1983-07-16 |
Family
ID=11478822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57000622A Pending JPS58119950A (en) | 1982-01-07 | 1982-01-07 | Exhaust pupifying unit of internal-combustion enging for car |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58119950A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10054081B2 (en) | 2014-10-17 | 2018-08-21 | Kohler Co. | Automatic starting system |
| US10240543B2 (en) | 2013-08-15 | 2019-03-26 | Kohler Co. | Integrated ignition and electronic auto-choke module for an internal combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5166934A (en) * | 1974-12-06 | 1976-06-10 | Nissan Motor | Nainenkikanno kunenhiseigyosochi |
| JPS52129833A (en) * | 1976-04-23 | 1977-10-31 | Nissan Motor Co Ltd | Air fuel ratio controller |
-
1982
- 1982-01-07 JP JP57000622A patent/JPS58119950A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5166934A (en) * | 1974-12-06 | 1976-06-10 | Nissan Motor | Nainenkikanno kunenhiseigyosochi |
| JPS52129833A (en) * | 1976-04-23 | 1977-10-31 | Nissan Motor Co Ltd | Air fuel ratio controller |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10240543B2 (en) | 2013-08-15 | 2019-03-26 | Kohler Co. | Integrated ignition and electronic auto-choke module for an internal combustion engine |
| US10794313B2 (en) | 2013-08-15 | 2020-10-06 | Kohler Co. | Integrated ignition and electronic auto-choke module for an internal combustion engine |
| US10054081B2 (en) | 2014-10-17 | 2018-08-21 | Kohler Co. | Automatic starting system |
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