JPH0561444U - Exhaust gas purification device for internal combustion engine - Google Patents
Exhaust gas purification device for internal combustion engineInfo
- Publication number
- JPH0561444U JPH0561444U JP260392U JP260392U JPH0561444U JP H0561444 U JPH0561444 U JP H0561444U JP 260392 U JP260392 U JP 260392U JP 260392 U JP260392 U JP 260392U JP H0561444 U JPH0561444 U JP H0561444U
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- exhaust
- pipe
- throttle valve
- heater
- 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
Landscapes
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
(57)【要約】
【目的】 本考案は、内燃機関の排気ガス浄化装置に関
し、着火性を向上させるて始動性をよくすると共に、ク
ランキング時排気ガスに含まれる有害成分を有効に取り
除くことを目的とする。
【構成】 触媒コンバータが排気管に設けられ、排気管
の触媒コンバータ下流側から排気ガスが排気還流管を通
って吸気管に還流される内燃機関の排気ガス浄化装置に
おいて、上記排気管の触媒コンバータ上流側に加熱ヒー
タを設け、排気管の排気還流管が分岐連結された下流側
に排気絞り弁を設け、クランキング時に前記加熱ヒータ
を通電し、排気絞り弁を閉鎖する指令信号を送る制御回
路を加熱ヒータ及び排気絞り弁に接続したことを特徴と
する。
(57) [Abstract] [Object] The present invention relates to an exhaust gas purifying apparatus for an internal combustion engine, which improves ignition performance and improves startability, and effectively removes harmful components contained in exhaust gas during cranking. With the goal. An exhaust gas purifying apparatus for an internal combustion engine, wherein a catalytic converter is provided in an exhaust pipe, and exhaust gas is returned from a downstream side of the catalytic converter of the exhaust pipe through an exhaust gas recirculation pipe to an intake pipe. A heating heater is provided on the upstream side, an exhaust throttle valve is provided on the downstream side where the exhaust gas recirculation pipe of the exhaust pipe is branched and connected, and a control circuit that sends a command signal to energize the heater when cranking and close the exhaust throttle valve Is connected to a heater and an exhaust throttle valve.
Description
【０００１】[0001]
本考案は、内燃機関の排気ガス浄化装置に関する。 The present invention relates to an exhaust gas purification device for an internal combustion engine.
【０００２】[0002]
従来、内燃機関の排気ガス浄化装置は、触媒コンバータが排気管に設けられ、 排気管の触媒コンバータ上流側又は下流側から排気ガスが排気還流管を通って吸 気管に還流させて排気ガス中に含まれるＮＯｘ（酸化窒素）を除去している（例 えば、実開昭６３−１３０６６号公報，実開昭５７−４２１５３号公報，特開平 ３−３３４６４号公報）。 Conventionally, in an exhaust gas purifying apparatus for an internal combustion engine, a catalytic converter is provided in an exhaust pipe, and exhaust gas from the upstream or downstream side of the catalytic converter in the exhaust pipe is returned to the intake pipe through an exhaust recirculation pipe and is discharged into the exhaust gas. The contained NOx (nitric oxide) is removed (for example, Japanese Utility Model Laid-Open No. 63-13066, Japanese Utility Model Laid-Open No. 57-42153, Japanese Patent Laid-Open No. 3-33464).
【０００３】 また、触媒コンバータが排気管に設けられ、排気管の触媒コンバータ上流側に 、加熱ヒータを設けて排気ガス温度を上昇させ、触媒コンバータによる反応を促 進して排気ガスに含まれる有害成分を除去している（例えば、特開平３−３１５ １０号公報）。Further, a catalytic converter is provided in the exhaust pipe, and a heater is provided on the upstream side of the catalytic converter in the exhaust pipe to raise the temperature of the exhaust gas and accelerate the reaction by the catalytic converter to cause harmful effects in the exhaust gas. The component is removed (for example, Japanese Patent Laid-Open No. 3-31510).
【０００４】[0004]
然し乍ら、上記前者の装置にあっては、排気ガスを排気還流管を通って吸気管 に還流させても、クランキング時、吸気温度を充分に上げることはできず、従っ て、着火性が充分でなく、始動性がよくない。 However, in the former device, even if exhaust gas is recirculated to the intake pipe through the exhaust gas recirculation pipe, the intake temperature cannot be sufficiently raised during cranking, and therefore the ignitability is sufficient. Also, the startability is not good.
【０００５】 一方、後者の装置にあっては、一定時間単に加熱ヒータで予熱だけであるから 、ホルムアルデヒト，未燃燃料，ＣＯ（一酸化炭素）等の排気ガスに含まれる有 害成分が有効に除去できなかった。On the other hand, in the latter device, since the heater is only preheated for a certain period of time, harmful components contained in exhaust gas such as formaldehyde, unburned fuel, CO (carbon monoxide), etc. are effectively used. Could not be removed.
【０００６】 本考案は上記に鑑みてなされたもので、着火性を向上させて始動性をよくする と共に、クランキング時、排気ガスに含まれるホルムアルデヒド等の有害成分を 有効に取り除くことができる内燃機関の排気ガス浄化装置を提供することを目的 とする。The present invention has been made in view of the above, and improves the ignition performance to improve the startability, and at the time of cranking, can effectively remove harmful components such as formaldehyde contained in exhaust gas. An object is to provide an exhaust gas purifying device for an engine.
【０００７】[0007]
本考案は、触媒コンバータが排気管に設けられ、排気管の触媒コンバータ下流 側から排気ガスが排気還流管を通って吸気管に還流される内燃機関の排気ガス浄 化装置において、上記排気管の触媒コンバータ上流側に加熱ヒータを設け、排気 管の排気還流管が分岐連結された下流側に排気絞り弁を設け、クランキング時に 前記加熱ヒータを通電し、排気絞り弁を閉鎖する指令信号を送る制御回路を加熱 ヒータ及び排気絞り弁に接続したことを特徴とする。 The present invention relates to an exhaust gas purifying apparatus for an internal combustion engine in which a catalytic converter is provided in an exhaust pipe, and exhaust gas is returned from a downstream side of the catalytic converter of the exhaust pipe through an exhaust gas recirculation pipe to an intake pipe. A heater is provided on the upstream side of the catalytic converter, and an exhaust throttle valve is provided on the downstream side where the exhaust gas recirculation pipe of the exhaust pipe is branched and connected.When cranking, the heating heater is energized and a command signal for closing the exhaust throttle valve is sent The control circuit is connected to the heater and the exhaust throttle valve.
【０００８】[0008]
クランキング時、排気絞り弁を閉じると共に、加熱ヒータを通電すると、加熱 ヒータ及び加熱ヒータに温められた触媒コンバータにより排気ガスが温められて 一部の排気ガスが排気還流管を通して吸気に戻され、吸気温度が上昇する。従っ て、着火性が向上して始動性がよくなる。 During cranking, when the exhaust throttle valve is closed and the heating heater is energized, the exhaust gas is warmed by the heating heater and the catalytic converter heated by the heating heater, and part of the exhaust gas is returned to the intake air through the exhaust gas recirculation pipe. Intake air temperature rises. Therefore, ignition performance is improved and startability is improved.
【０００９】 また、クランキング時の未燃焼サイクルで排出されたホルムアルデヒド，未燃 燃料等の排気ガスに含まれる有害成分が吸気側に戻って再び燃焼する。従って、 排気ガスに含まれるホルムアルデヒド，未燃燃料等の有害成分が有効に取り除か れる。Further, harmful components contained in the exhaust gas such as formaldehyde and unburned fuel discharged in the unburned cycle during cranking return to the intake side and are burned again. Therefore, harmful components such as formaldehyde and unburned fuel contained in the exhaust gas are effectively removed.
【００１０】[0010]
以下、本考案を図に基づいて詳細に説明する。 図１は、本考案に係る内燃機関の排気ガス浄化装置の一実施例を示したもので ある。 Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of an exhaust gas purifying apparatus for an internal combustion engine according to the present invention.
【００１１】 図において、１は車両の排気管で、その途中に触媒コンバータ２が設けられ、 後端にはマフラ３が設けられている。触媒コンバータ２の上流側には、排気ガス を加熱する加熱ヒータ４が備えられている。In the figure, reference numeral 1 is an exhaust pipe of a vehicle, a catalytic converter 2 is provided in the middle thereof, and a muffler 3 is provided at a rear end thereof. A heater 4 for heating exhaust gas is provided on the upstream side of the catalytic converter 2.
【００１２】 また、触媒コンバータ２の下流側には、アクチュエータ５の駆動によりリンク ６を介して開閉される排気絞り弁７が設けられている。８は吸気管で、吸気管８ と排気管１の触媒コンバータ２の下流側が排気還流管９で連結されている。排気 還流管９の吸気管８に近い所には、排気還流制御弁１０が設けられている。吸気 管８の排気還流管９が連結する上流側には、アクチュエータ１１の駆動によりリ ンク１２を介して開閉される吸気絞り弁１３が設けられている。An exhaust throttle valve 7 that is opened and closed via a link 6 by driving an actuator 5 is provided on the downstream side of the catalytic converter 2. Reference numeral 8 denotes an intake pipe, and the intake pipe 8 and the exhaust pipe 1 are connected to the downstream side of the catalytic converter 2 by an exhaust gas recirculation pipe 9. An exhaust gas recirculation control valve 10 is provided near the intake gas recirculation pipe 9 of the exhaust gas recirculation pipe 9. An intake throttle valve 13 that is opened / closed via a link 12 by driving an actuator 11 is provided on the upstream side of the intake pipe 8 to which the exhaust gas recirculation pipe 9 is connected.
【００１３】 そして、加熱ヒータ４，排気絞り弁７のアクチュエータ５，排気絞り弁１３の アクチュエータ１１に、エンジンの回転センサ１４からの信号により、クランキ ング時、これらに通電する指令信号を送るコントロールユニットからなる制御回 路１５が接続している。Then, a control unit for sending a command signal for energizing these to the heater 4, the actuator of the exhaust throttle valve 7, and the actuator 11 of the exhaust throttle valve 13 by the signal from the engine rotation sensor 14 during cranking. Is connected to the control circuit 15.
【００１４】 本考案の内燃機関の排気ガス浄化装置は、かかる構造になっており、図２に示 すように先ず加熱ヒータ４を予熱してエンジンクランキング状態にある時に、排 気絞り弁７を閉鎖し、吸気絞り弁１３を閉鎖して排気還流制御弁１０を開放する と、加熱ヒータ４に温められた排気ガス及びクランキング時の未燃焼サイクルで 排出された未燃燃料が排気還流管９を通って吸気側に戻り、エンジンの燃焼室で 再び燃焼する。The exhaust gas purifying apparatus for an internal combustion engine according to the present invention has such a structure. As shown in FIG. 2, when the heater 4 is first preheated to be in the engine cranking state, the exhaust throttle valve 7 When the intake throttle valve 13 is closed and the exhaust gas recirculation control valve 10 is opened, the exhaust gas warmed by the heater 4 and unburned fuel discharged in the unburned cycle during cranking are exhausted in the exhaust gas recirculation pipe. It returns to the intake side through 9 and burns again in the combustion chamber of the engine.
【００１５】 そして、回転センサ１４からの信号を感知し、エンジンが始動したら、排気絞 り弁７及び吸気絞り弁１３を全開し、触媒コンバータ２を通過した排気ガスをマ フラ３を通して大気に排出し、また必要に応じて排気還流制御弁１０を開閉して 排気を還流させてエンジンを駆動する。When the signal from the rotation sensor 14 is sensed and the engine is started, the exhaust throttle valve 7 and the intake throttle valve 13 are fully opened, and the exhaust gas passing through the catalytic converter 2 is discharged to the atmosphere through the muffler 3. If necessary, the exhaust gas recirculation control valve 10 is opened / closed to recirculate the exhaust gas to drive the engine.
【００１６】 このように、加熱ヒータ４を通電し、クランキング時、排気絞り弁７，吸気絞 り弁１３を閉じると共に、排気還流制御弁１０を開放すると、加熱ヒータ４及び 加熱ヒータ４に温められた触媒コンバータ２により排気ガスが温められて排気ガ スが排気還流管９を通して吸気に戻され、吸気温度が上昇する。従って、着火性 が向上して始動性がよくなる。As described above, when the heater 4 is energized and the exhaust throttle valve 7 and the intake throttle valve 13 are closed and the exhaust gas recirculation control valve 10 is opened during cranking, the heater 4 and the heater 4 are heated. The exhaust gas is warmed by the catalytic converter 2 thus obtained, the exhaust gas is returned to the intake air through the exhaust gas recirculation pipe 9, and the intake air temperature rises. Therefore, the ignitability is improved and the startability is improved.
【００１７】 また、クランキング時の未燃焼サイクルで排出されたホルムアルデヒド，未燃 燃料等の有害成分が吸気側に戻って再び燃焼するので、排気ガスに含まれるホル ムアルデヒド，未燃燃料等の有害成分が有効に取り除かれる。Further, since harmful components such as formaldehyde and unburned fuel discharged in the unburned cycle during cranking return to the intake side and burned again, harmful components such as formaldehyde and unburned fuel contained in the exhaust gas are burned. The components are effectively removed.
【００１８】 上記実施例においては、クランキング時、吸気絞り弁１３を閉鎖し、排気還流 制御弁１０を開放しているが、排気絞り弁７を閉鎖すれば、排気ガスは排気還流 管９を通って吸気側に還流できるので、吸気絞り弁１３及び排気還流制御弁１０ は必ずしも必要とはしない。In the above embodiment, the intake throttle valve 13 is closed and the exhaust gas recirculation control valve 10 is opened during cranking. However, when the exhaust throttle valve 7 is closed, the exhaust gas flows through the exhaust gas recirculation pipe 9. The intake throttle valve 13 and the exhaust gas recirculation control valve 10 are not always necessary because they can be recirculated to the intake side.
【００１９】[0019]
以上説明したように本考案は、着火性が向上して始動性がよくなると共に、ク ランキング時、排気ガスに含まれるホルムアルデヒド，未燃燃料等の有害成分を 有効に取り除くことができる効果を奏する。 As described above, the present invention has the effects of improving ignition performance and improving startability, and being able to effectively remove harmful components such as formaldehyde and unburned fuel contained in exhaust gas during cranking.
【図面の簡単な説明】[Brief description of drawings]
【図１】本考案の一実施例の構成図である。FIG. 1 is a block diagram of an embodiment of the present invention.
【図２】本考案の一実施例の各要素と経過時間との関係
を示す図である。FIG. 2 is a diagram showing a relationship between each element of one embodiment of the present invention and elapsed time.
１ 排気管 ２ 触媒コンバータ ４ 加熱ヒータ ９ 排気還流管 １４ 回転センサ １５ コントロールユニット（制御回路） 1 Exhaust pipe 2 Catalytic converter 4 Heater 9 Exhaust gas recirculation pipe 14 Rotation sensor 15 Control unit (control circuit)
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０２Ｍ 25/07 ５５０ Ｈ 8923−3Ｇ Ｒ 8923−3Ｇ Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location F02M 25/07 550 H 8923-3G R 8923-3G
Claims (1)
気管の触媒コンバータ下流側から排気ガスが排気還流管
を通って吸気管に還流される内燃機関の排気ガス浄化装
置において、上記排気管の触媒コンバータ上流側に加熱
ヒータを設け、排気管の排気還流管が分岐連結された下
流側に排気絞り弁を設け、クランキング時に前記加熱ヒ
ータを通電し、排気絞り弁を閉鎖する指令信号を送る制
御回路を加熱ヒータ及び排気絞り弁に接続したことを特
徴とする内燃機関の排気ガス浄化装置。1. An exhaust gas purifying apparatus for an internal combustion engine, wherein a catalytic converter is provided in an exhaust pipe, and exhaust gas is returned from a downstream side of the catalytic converter of the exhaust pipe through an exhaust gas recirculation pipe to an intake pipe. A heater is provided on the upstream side of the catalytic converter, an exhaust throttle valve is provided on the downstream side where the exhaust gas recirculation pipe of the exhaust pipe is branched, and the heating heater is energized during cranking, and a command signal for closing the exhaust throttle valve is sent. An exhaust gas purifying apparatus for an internal combustion engine, wherein a control circuit is connected to a heater and an exhaust throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP260392U JPH0561444U (en) | 1992-01-28 | 1992-01-28 | Exhaust gas purification device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP260392U JPH0561444U (en) | 1992-01-28 | 1992-01-28 | Exhaust gas purification device for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0561444U true JPH0561444U (en) | 1993-08-13 |
Family
ID=11533970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP260392U Pending JPH0561444U (en) | 1992-01-28 | 1992-01-28 | Exhaust gas purification device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0561444U (en) |
-
1992
- 1992-01-28 JP JP260392U patent/JPH0561444U/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6868668B2 (en) | Internal combustion engine | |
| EP1013904A3 (en) | Internal combustion engine having lean NOx catalyst | |
| JPH0622554U (en) | Engine exhaust gas recirculation system | |
| US11525389B2 (en) | Engine assembly and method | |
| JPH0561444U (en) | Exhaust gas purification device for internal combustion engine | |
| JPH0564450U (en) | Exhaust gas recirculation system for internal combustion engine | |
| JPH0618069Y2 (en) | Engine starter | |
| JP2578869Y2 (en) | Catalyst device for internal combustion engine | |
| JP3520789B2 (en) | Exhaust gas purification device for internal combustion engine | |
| JP2010138717A (en) | Exhaust gas after-treatment device for diesel engine | |
| JPH0569317U (en) | Exhaust gas purification device for internal combustion engine | |
| JP2579742Y2 (en) | Catalyst device for internal combustion engine | |
| JP3320793B2 (en) | Engine control device | |
| JPH04111540U (en) | Exhaust gas purification device | |
| JP2002070663A (en) | Internal combustion engine having combustion heater | |
| JPH0634121U (en) | Exhaust gas recirculation control device for internal combustion engine | |
| JP4265121B2 (en) | Internal combustion engine having a combustion heater | |
| JPH05340310A (en) | Egr control method in diesel engine | |
| JPH0763125A (en) | Diesel engine with egr | |
| JPH0524942U (en) | Intake heater device | |
| JPH0598952A (en) | Alcohol engine | |
| JPS63253108A (en) | Regenerative processing device for filter | |
| JPH0710419U (en) | Exhaust gas purification device for internal combustion engine | |
| JPH04105925U (en) | Automotive engine exhaust gas purification device | |
| JPH0625510U (en) | Engine exhaust purification device |