JPS59213916A - Purifying device of exhaust in water-cooled internal-combustion engine - Google Patents
Purifying device of exhaust in water-cooled internal-combustion engineInfo
- Publication number
- JPS59213916A JPS59213916A JP58088766A JP8876683A JPS59213916A JP S59213916 A JPS59213916 A JP S59213916A JP 58088766 A JP58088766 A JP 58088766A JP 8876683 A JP8876683 A JP 8876683A JP S59213916 A JPS59213916 A JP S59213916A
- Authority
- JP
- Japan
- Prior art keywords
- secondary air
- exhaust
- passage
- check valve
- water
- 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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/30—Arrangements for supply of additional air
- F01N3/34—Arrangements for supply of additional air using air conduits or jet air pumps, e.g. near the engine exhaust port
-
- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
-
- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/18—DOHC [Double overhead camshaft]
-
- 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
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は水冷式内燃エンジンの排気浄化装置に関し、特
に、排気脈動を利用して排気ガス中に二次空気を供給し
排気ガスの浄化を図る排気浄化装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust gas purification device for a water-cooled internal combustion engine, and more particularly to an exhaust gas purification device that uses exhaust pulsation to supply secondary air into exhaust gas to purify the exhaust gas.
一般に車輌用エンジンは二次空気供給装置を備え、エン
ジンの排気ガス中の未燃ガスを排気系で酸化して浄化す
るため、排気系に二次、空気を供給するようにしている
。Generally, a vehicle engine is equipped with a secondary air supply device, which supplies secondary air to the exhaust system in order to oxidize and purify unburned gas in the engine exhaust gas in the exhaust system.
一般に二次空気供給装置には、二次空気通路を排気ガス
が逆流するのを防止するために逆止弁が配設され、この
逆止弁を排気通路内の排気ガス圧の脈動で直接開閉制御
している。従って、排気ガス圧の脈動に対する逆止弁の
制御応答を速めるには排気通路と逆止弁との間の二次空
気通路の長さを短くすることが望ましい。しかるに、二
次空気通路を短くすると二次空気通路を逆流する排気ガ
スの高熱の影響を受ける逆止弁の耐熱性を考慮しなけれ
ばならない。また、排気系に供給する二次空気の温度の
冷寒時と暑い時とのバラツキを少なくし、排気ガスに対
し温度変化の小さい二次空気を供給すことも望まれる。Generally, a secondary air supply device is equipped with a check valve to prevent exhaust gas from flowing backward through the secondary air passage, and this check valve is opened and closed directly by the pulsation of exhaust gas pressure in the exhaust passage. It's in control. Therefore, in order to speed up the control response of the check valve to pulsations in exhaust gas pressure, it is desirable to shorten the length of the secondary air passage between the exhaust passage and the check valve. However, if the secondary air passage is shortened, consideration must be given to the heat resistance of the check valve, which is affected by the high heat of exhaust gas flowing back through the secondary air passage. It is also desired to reduce the variation in the temperature of the secondary air supplied to the exhaust system between cold and hot times, and to supply secondary air with a small temperature change to the exhaust gas.
本発明は上述の点に鑑みてなされたもので、二次空気通
路の長さを短くして二次空気供給制御の制御応答を速め
、かつ排気浄化性能の向」二を図り、しかも逆止弁れ熱
影響を防ぐことを目的とするこの目的を達成するため本
発明では、エンジンの排気系に二次空気を供給する水冷
式内燃エンジンの排気浄化装置において、前記二次空気
を供給する二次空気通路をシリンダヘッドのウォータジ
ャケット内に配設すると共に５エンジンの燃焼室に連設
される排気通路に前記二次空気通路の開口部を形成し、
前記排気通路方向への二次空気の流通のみを許容する逆
止弁を前記二次空気通路に配設し、前記排気通路内の排
気圧力の脈動を利用して該排気通路内に二次空気を供給
する水冷式内燃エンジンの排気浄化装置を提供するもの
である。The present invention has been made in view of the above-mentioned points, and aims to shorten the length of the secondary air passage to speed up the control response of the secondary air supply control, improve exhaust purification performance, and prevent backlash. In order to achieve this objective of preventing valve leakage heat effects, the present invention provides an exhaust purification system for a water-cooled internal combustion engine that supplies secondary air to the exhaust system of the engine. a secondary air passage is arranged in the water jacket of the cylinder head, and an opening of the secondary air passage is formed in an exhaust passage connected to the combustion chamber of the engine 5;
A check valve that allows secondary air to flow only in the direction of the exhaust passage is disposed in the secondary air passage, and a check valve that allows secondary air to flow only in the direction of the exhaust passage is disposed in the secondary air passage. The present invention provides an exhaust gas purification device for a water-cooled internal combustion engine.
以下本発明の一実施例を図面を参照して説明する。An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の排気浄化装置を適用した水冷式内燃エ
ンジンの全体構成の概略を説明する図である。FIG. 1 is a diagram illustrating the outline of the overall configuration of a water-cooled internal combustion engine to which the exhaust gas purification device of the present invention is applied.
第１図において、内燃エンジン１のシリンダブロック２
には、ピストン３が摺動するシリンダの周囲にウォータ
ジャケット４が形成されている。In FIG. 1, a cylinder block 2 of an internal combustion engine 1 is shown.
A water jacket 4 is formed around the cylinder in which the piston 3 slides.
このシリンダブロック２の上部に配設固定されたシリン
ダヘッド５には排気通路６と吸気通路７とが穿設され、
この排気通路６と吸気道、路７は夫々排気孔８．吸気孔
９を介して燃焼室１０に連設されている。この排気孔８
と吸気孔９は夫々排気バルブ１１．吸気バルブ１２によ
り開閉される。An exhaust passage 6 and an intake passage 7 are bored in the cylinder head 5 arranged and fixed on the upper part of the cylinder block 2.
The exhaust passage 6, the intake passage, and the passage 7 are each connected to an exhaust hole 8. It is connected to a combustion chamber 10 via an intake hole 9. This exhaust hole 8
and intake hole 9 are respectively exhaust valves 11. It is opened and closed by the intake valve 12.
シリンダヘッド５にはシリンダブロック２のウォータジ
ャケット４と連通ずるウォータジャケット１３が形成さ
れている。このウォータジャケット１３内に、その−右
端が排気通路６に開口する二次空気通路２５が詳細は後
述するように形成され、二次空気通路２５の他方端部に
はリードバルブで成る逆止弁２１が配設されている。A water jacket 13 is formed in the cylinder head 5 and communicates with the water jacket 4 of the cylinder block 2. A secondary air passage 25 whose right end opens into the exhaust passage 6 is formed in this water jacket 13 as will be described in detail later, and a check valve consisting of a reed valve is provided at the other end of the secondary air passage 25. 21 are arranged.
吸気通路７の上流側はキャブレタ１４の下流側に接続さ
れ、キャブレタ１４の上流側はエアクリーナエレメント
１５に接続され、キャブレタ１４の吸入通路１６の下流
にはスロットルバルブ１７が配設されている。そして排
気通路６の下流には排気管１８が接続されている。The upstream side of the intake passage 7 is connected to the downstream side of the carburetor 14, the upstream side of the carburetor 14 is connected to the air cleaner element 15, and the throttle valve 17 is disposed downstream of the intake passage 16 of the carburetor 14. An exhaust pipe 18 is connected downstream of the exhaust passage 6.
二次空気制御バルブ１９は、弁室１９ａ、大気室１９ｂ
及び負圧室１９″Ｃ，を有し、大気室１９ｂと負圧室ｊ
９ｃとはダイアフラム１９ｄで画成されている。弁室１
９ａは管路２０によりエンジン］のシリンダヘッド５に
配設された逆止弁２１の入口側に接続されると共に、管
路２２によりエアクリーナエレメント１５の下流側と接
続されている。また、弁室１９ａ内には管路２０と管路
２２との連通を開閉する弁体１９ｅがバネ１９ｆによっ
て開弁方向即ち弁座１９ｇから離間する方向に付勢さｉ
ｔて設けられ、弁体１９ｅとダイアフラム１９ｄとは一
体に連動するように取り伺けられている。The secondary air control valve 19 includes a valve chamber 19a and an atmospheric chamber 19b.
and a negative pressure chamber 19''C, including an atmospheric chamber 19b and a negative pressure chamber j.
9c is defined by a diaphragm 19d. Valve chamber 1
9a is connected to the inlet side of a check valve 21 disposed in the cylinder head 5 of the engine through a conduit 20, and is connected to the downstream side of the air cleaner element 15 through a conduit 22. Further, within the valve chamber 19a, a valve body 19e for opening and closing communication between the conduit 20 and the conduit 22 is biased by a spring 19f in the valve opening direction, that is, in the direction away from the valve seat 19g.
The valve body 19e and the diaphragm 19d are arranged so as to be integrally interlocked with each other.
さらに、負圧室１９ｃは管路２３により吸気通路７に接
続されている。Further, the negative pressure chamber 19c is connected to the intake passage 7 by a pipe line 23.
第２図は水冷式２気筒内燃エンジンのシリンダヘッドの
上面図で、第３図は第２図の矢線Ｉ■−■断面図である
。FIG. 2 is a top view of a cylinder head of a water-cooled two-cylinder internal combustion engine, and FIG. 3 is a cross-sectional view taken along the arrow I---------.
第２図及び第３図において、シリンダヘッド５には燃焼
室１０（第１図）の上端部１０ａ、排気通路６及び吸気
通路７が夫々気筒と同数穿設されている。各気筒毎に、
排気通路６、燃焼室１０の上端部１０ａ及び吸気通路７
は夫々排気孔８、吸気孔９を介して連設されている。尚
、第２図に示す符号１１′及び１２′は夫々各気筒にお
ける排気バルブ１１ （第１図）及び吸気バルブ】２（
第１図）の挿通孔である。2 and 3, the cylinder head 5 is provided with the upper end 10a of the combustion chamber 10 (FIG. 1), the same number of exhaust passages 6, and the same number of intake passages as the cylinders. For each cylinder,
Exhaust passage 6, upper end 10a of combustion chamber 10, and intake passage 7
are connected to each other via an exhaust hole 8 and an intake hole 9, respectively. Note that the symbols 11' and 12' shown in FIG. 2 indicate the exhaust valve 11 (FIG. 1) and the intake valve ]2(
This is the insertion hole shown in Fig. 1).
シリンダヘッド５の内部には、両方の気筒に亘って燃焼
室の上端部１０ａと排気通路６の排気孔８近傍とを包囲
するウォータジャケット１３が形成されている。A water jacket 13 is formed inside the cylinder head 5 and surrounds the upper end 10a of the combustion chamber and the vicinity of the exhaust hole 8 of the exhaust passage 6 over both cylinders.
ウォータジャケット１３と各気筒の排気通路６とを夫々
画成するシリンダヘッド５の仕切壁５ａと、シリンダヘ
ッド５の外側壁５ｂとの間のウォータジャケット１３内
には、パイプ状の二次空気通路２５が各気筒毎に設けら
れている。この二次空気通路２５はその横断面を第４図
に示すごとく、ウォータジャケット１３内の冷却水との
接触面積が大きくなるように二次空気通路２５の外径よ
り幅の小さな支持部材２５ｃによりウォータジャケット
１３内に架設されている。前記仕切壁５ａに穿設され排
気通路６に開口する二次空気通路２５の開口端２５ａは
、排気孔８の近傍すなわち排気バルブ１１ （第１図）
の近傍に設けられている。二次空気通路２５の他方開口
部２５ｂが穿設された前記外側壁５ｂの外側には逆止弁
取付用のボス部５ｃが形成されている。A pipe-shaped secondary air passage is provided in the water jacket 13 between the partition wall 5a of the cylinder head 5, which defines the water jacket 13 and the exhaust passage 6 of each cylinder, and the outer wall 5b of the cylinder head 5. 25 is provided for each cylinder. As shown in FIG. 4 in cross section, this secondary air passage 25 is constructed by a supporting member 25c having a width smaller than the outer diameter of the secondary air passage 25 so as to increase the contact area with the cooling water in the water jacket 13. It is installed within the water jacket 13. The opening end 25a of the secondary air passage 25, which is bored in the partition wall 5a and opens into the exhaust passage 6, is located near the exhaust hole 8, that is, the exhaust valve 11 (FIG. 1).
It is located near the. A boss portion 5c for attaching a check valve is formed on the outside of the outer wall 5b in which the other opening 25b of the secondary air passage 25 is bored.
上述の様に構成されるシリンダヘッド５は、例えば鋳造
により一体形成される。The cylinder head 5 configured as described above is integrally formed, for example, by casting.
シリンダヘッド５のボス部５ｃには、第５図に示すよう
に、二次空気制御バルブ１９（第１図）を通して供給さ
れる二次空気を二次、空気通路２５を介して耕気通路６
に導入制御する逆止弁が取り付けられる。第５図及び第
２図において、ボス部５ｃに穿設された嵌合孔５ｄにリ
ードバルブで成る逆止弁２１が嵌合され、このリードバ
ルブ２１はボルト２６．２７でリードバルブカバー２８
をボス部５ｃに締着することにより固定される。リード
バルブ２１の弁体２１ａは二次空気を排気通路６側に供
給する方向に配設されている。As shown in FIG. 5, the boss portion 5c of the cylinder head 5 receives secondary air supplied through the secondary air control valve 19 (FIG. 1) through the air passage 25 and into the tillage passage 6.
A check valve is installed to control the introduction. In FIGS. 5 and 2, a check valve 21 made of a reed valve is fitted into a fitting hole 5d formed in a boss portion 5c, and this reed valve 21 is attached to a reed valve cover 28 with bolts 26 and 27.
It is fixed by fastening it to the boss portion 5c. The valve body 21a of the reed valve 21 is arranged in a direction that supplies secondary air to the exhaust passage 6 side.
リードバルブカバー２８には管路接続用の接続口２８ａ
が突設されており、この接続口２８ａに二次空気制御び
ルブ１９（第１図）に接続された管路、本実施例ではゴ
ムホース２０がホースバンド２９で接続固定される。The reed valve cover 28 has a connection port 28a for conduit connection.
A conduit connected to the secondary air control valve 19 (FIG. 1), a rubber hose 20 in this embodiment, is connected and fixed to this connection port 28a with a hose band 29.
次に上記実施例の作動について説明する。Next, the operation of the above embodiment will be explained.
第１図において、エンジン１を例えば減速運転する場合
にはスロットル弁１７が絞られる。スロットル弁１７が
絞られると吸気通路７内に高負圧が発生し、この高負圧
が管路２３を通して二次空気制御バルブ１９の負圧室１
’ｌｃに伝えられると。In FIG. 1, when the engine 1 is operated at a reduced speed, for example, the throttle valve 17 is throttled. When the throttle valve 17 is throttled, a high negative pressure is generated in the intake passage 7, and this high negative pressure passes through the conduit 23 to the negative pressure chamber 1 of the secondary air control valve 19.
'LC will be informed.
ダイアフラム１９ｄが負圧室１９ｃ側に吸引され、これ
に伴って弁体１９ｅが右動して管路２２と２０との連通
が遮断される。The diaphragm 19d is attracted toward the negative pressure chamber 19c, and the valve body 19e moves to the right to cut off communication between the pipes 22 and 20.
また、スロットル弁１７が絞られるに従って吸気通路７
の内壁面上の燃料が蒸発し、燃焼室】０に吸入される混
合気は過濃となる。従って、燃焼室ｌＯから排気通路６
に排出される排気ガス中には多量の未燃ガスが含まれ、
これに二次空気を送り込むとアフタバーンを起こし易く
なる。In addition, as the throttle valve 17 is throttled, the intake passage 7
The fuel on the inner wall of the combustion chamber evaporates, and the air-fuel mixture sucked into the combustion chamber becomes rich. Therefore, from the combustion chamber lO to the exhaust passage 6
The exhaust gas emitted by the engine contains a large amount of unburned gas,
If secondary air is sent into this, afterburn is likely to occur.
このため、アフタバーンか発生しない様に吸気通路７内
の負圧が一定値以上になると二次空気の供給を中止する
ようにしている。Therefore, to prevent afterburn from occurring, the supply of secondary air is stopped when the negative pressure in the intake passage 7 exceeds a certain value.
一方、排気通路６内に発生する排気脈動の負圧時にはリ
ードバルブ２１は開弁状態となり、二次空気がエアクリ
ーナエレメント１５の下流側から管路２２．２０及び二
次空気通路２５を介して排気通路６内に供給される。こ
の結果、未燃ガスは二次空気中の酸素と酸化反応して浄
化される。On the other hand, when the negative pressure due to exhaust pulsation occurs in the exhaust passage 6, the reed valve 21 is opened, and secondary air is exhausted from the downstream side of the air cleaner element 15 via the pipe 22, 20 and the secondary air passage 25. It is supplied into the passage 6. As a result, the unburned gas undergoes an oxidation reaction with oxygen in the secondary air and is purified.
排気脈動の正圧時には排気ガスは二次空気通路２５より
り−１くバルブ２１の方へ逆流を始める。At the time of positive exhaust pulsation pressure, the exhaust gas begins to flow back toward the valve 21 from the secondary air passage 25.
このとき、リードバルブ２１は閉弁状態になり、排気ガ
スのエアクリーナニレメン１〜１５の下流側への逆流は
阻止される。At this time, the reed valve 21 is closed, and the backflow of exhaust gas to the downstream side of the air cleaner panels 1 to 15 is prevented.
また、エンジン１に配設された図示しないウォータポン
プから冷却水がシリンダブロック２のウォータジャケラ
１−４に供給され、この冷却水はシリンダ外周を冷却し
た後シリンダヘッド５のウォータジャケット１３に導入
される。このため、前述したように高温の排気ガスが二
次空気通路２５を逆流しても、二次空気通路２５はウォ
ータジャケット１３の冷却水により冷却され、逆流した
排気ガ又はリードバルブ２１に到達するまでに冷却され
る。尚、ウォータジャケット１３の冷却水はシリンダヘ
ッド５に形成された冷却水流出口からラジェータ（いず
れも図示せず）に流出される。Cooling water is supplied from a water pump (not shown) provided in the engine 1 to the water jacket 1-4 of the cylinder block 2, and this cooling water is introduced into the water jacket 13 of the cylinder head 5 after cooling the outer periphery of the cylinder. be done. Therefore, as described above, even if high-temperature exhaust gas flows backward through the secondary air passage 25, the secondary air passage 25 is cooled by the cooling water of the water jacket 13, and the exhaust gas flowing backward reaches the reed valve 21. until cooled down. Note that the cooling water in the water jacket 13 flows out from a cooling water outlet formed in the cylinder head 5 to a radiator (none of which is shown).
このように、二次空気通路２５を冷却水で冷却するため
、二次空気通路２５の長さを短くしてリードバルブ２１
を排気通路６に近づけることができ、排気通路６におけ
る排気脈動によるリードバルブ２１の追従性が向上′し
５排気浄化性能が高まる。さらに、リードバルブ２１及
びリードバルブ廻りの部品としてコムチューブ等の比較
的耐熱性の低い部材の利用範囲が拡大され、エンジンへ
の配管等の自由度か増すと共に配管をコンパクトにする
ことができ外観を損ねることがない。In this way, in order to cool the secondary air passage 25 with cooling water, the length of the secondary air passage 25 is shortened and the reed valve 21 is
can be brought closer to the exhaust passage 6, the ability of the reed valve 21 to follow the exhaust pulsations in the exhaust passage 6 is improved, and the exhaust gas purification performance is improved. Furthermore, the range of use of components with relatively low heat resistance such as comb tubes as the reed valve 21 and parts around the reed valve has been expanded, increasing the degree of freedom in piping to the engine, etc., and making the piping more compact, allowing for a more compact exterior appearance. There is no harm to it.
また、二次空気は、逆にウォータジャケン１−１３内の
冷却水の温度まで暖められた後に排気通路６に供給さｈ
るので、二次空気供給による排気ガスの温度低下が少な
くてすみ排気浄化性能が向上する。In addition, the secondary air is heated to the temperature of the cooling water in the water jacket 1-13 and then supplied to the exhaust passage 6.
Therefore, the temperature drop in the exhaust gas due to the secondary air supply is reduced, and the exhaust gas purification performance is improved.
尚、上述実施例ではリードバルブとシリンダヘソトとを
別々に設けたが、これ等を一体に設けることもできる。Incidentally, in the above-described embodiment, the reed valve and the cylinder bottom were provided separately, but they may also be provided integrally.
以」二説明したように本発明によれば、エンジンの排気
系に二次空気を供給する水冷式内燃エンジンの排気浄化
装置において、前記二次空気を供給する二次空気通路を
シリンダヘッドのウォータジャケット内に配設すると共
に、エンジンの燃焼室に連設される排気通路に前記二次
空気通路の開口部を形成し、前記排気通路方向への二次
空気の流通のみを許容する逆止弁を前記二次空気通路に
配設し、前記排気通路内の排気圧力の脈動を利用して該
排気通路内に二次空気を供給するようにしたので、排気
通路と逆止弁間の二次空気通路を近イ」けることができ
排気ルミ動に対する差止弁の応答性を高めることができ
ると共に、冷却水にて二次空気の温度も一定に保たれ排
気浄化性能が向上する。As explained below, according to the present invention, in the exhaust purification device for a water-cooled internal combustion engine that supplies secondary air to the exhaust system of the engine, the secondary air passage that supplies the secondary air is connected to the water pipe of the cylinder head. A check valve that is disposed within a jacket, forms an opening for the secondary air passage in an exhaust passage connected to a combustion chamber of the engine, and allows secondary air to flow only in the direction of the exhaust passage. is arranged in the secondary air passage, and the pulsation of the exhaust pressure in the exhaust passage is used to supply secondary air into the exhaust passage, so that the secondary air between the exhaust passage and the check valve is The air passages can be made closer together, increasing the responsiveness of the stop valve to the movement of the exhaust gas, and the temperature of the secondary air can also be kept constant with the cooling water, improving exhaust gas purification performance.
さらにまた、使用する接続部材や逆止弁の熱的耐久性を
向上することができる。Furthermore, the thermal durability of the connecting members and check valves used can be improved.
第１図は本発明の一実施例による排気浄化装置を適用し
た水冷式内燃エンジンの全体構成を説明する図、第２図
はシリンダヘッドの上面図、第３図は第２図の矢線ｍ
−ＩＩ断面図、第４１図は第２図の矢線ＩＶ−ＩＶ断面
図、第５図は逆止弁の取付図である。
■・・・エンジン、５・・・シリンダヘッド、６・・・
排気通路、１３・・・ウォータジャケット、１９・・・
二次空気制御バルブ、２１・・・逆止弁、２５・・・二
次空気通路。
出願人 本田技研工業株式会社
代理人 弁理± ５渡部 敏彦Fig. 1 is a diagram illustrating the overall configuration of a water-cooled internal combustion engine to which an exhaust purification device according to an embodiment of the present invention is applied, Fig. 2 is a top view of a cylinder head, and Fig. 3 is an arrow line m in Fig. 2.
-II sectional view, FIG. 41 is a sectional view taken along the arrow line IV-IV in FIG. 2, and FIG. 5 is an installation diagram of the check valve. ■...Engine, 5...Cylinder head, 6...
Exhaust passage, 13... Water jacket, 19...
Secondary air control valve, 21... Check valve, 25... Secondary air passage. Applicant: Honda Motor Co., Ltd. Attorney ± 5 Toshihiko Watabe
Claims (1)
燃エンジンの排気浄化装置において、前記二次空気を供
給する二次空気通路をシリンダヘッドのウォータジャケ
ット内に配設すると共に、エンジンの燃焼室に連設され
る排気通路に前記二次空気通路の開口部を形成し、前記
排気通路方向への二次空気の流通のみを許容する逆止弁
を前記二次空気通路に配設し、前記排気通路内の耕気圧
力の脈動を利用して該排気通路内に二次空気を供給する
ことを特徴とする水冷式内燃エンジンの排気浄化装置。■ In an exhaust purification device for a water-cooled internal combustion engine that supplies secondary air to the engine exhaust system, the secondary air passage that supplies the secondary air is disposed within the water jacket of the cylinder head, and the engine combustion forming an opening for the secondary air passage in an exhaust passage connected to the chamber, and disposing a check valve in the secondary air passage that allows secondary air to flow only in the direction of the exhaust passage; An exhaust purification device for a water-cooled internal combustion engine, characterized in that secondary air is supplied into the exhaust passage by utilizing pulsation of plowing pressure within the exhaust passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58088766A JPS59213916A (en) | 1983-05-20 | 1983-05-20 | Purifying device of exhaust in water-cooled internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58088766A JPS59213916A (en) | 1983-05-20 | 1983-05-20 | Purifying device of exhaust in water-cooled internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59213916A true JPS59213916A (en) | 1984-12-03 |
Family
ID=13951980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58088766A Pending JPS59213916A (en) | 1983-05-20 | 1983-05-20 | Purifying device of exhaust in water-cooled internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59213916A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1857663A2 (en) * | 2006-05-16 | 2007-11-21 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine |
| ITMI20131783A1 (en) * | 2013-10-25 | 2015-04-26 | Giovanni Talpo | DEVICE FOR THE FLUID DYNAMIC IMPROVEMENT OF GASES IN AN ALTERNATIVE INTERNAL COMBUSTION ENGINE |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516105U (en) * | 1978-07-15 | 1980-02-01 |
-
1983
- 1983-05-20 JP JP58088766A patent/JPS59213916A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516105U (en) * | 1978-07-15 | 1980-02-01 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1857663A2 (en) * | 2006-05-16 | 2007-11-21 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine |
| US7493891B2 (en) | 2006-05-16 | 2009-02-24 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine |
| EP1857663A3 (en) * | 2006-05-16 | 2009-05-27 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine |
| ITMI20131783A1 (en) * | 2013-10-25 | 2015-04-26 | Giovanni Talpo | DEVICE FOR THE FLUID DYNAMIC IMPROVEMENT OF GASES IN AN ALTERNATIVE INTERNAL COMBUSTION ENGINE |
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