JPH0514086B2 - - Google Patents
Info
- Publication number
- JPH0514086B2 JPH0514086B2 JP58185992A JP18599283A JPH0514086B2 JP H0514086 B2 JPH0514086 B2 JP H0514086B2 JP 58185992 A JP58185992 A JP 58185992A JP 18599283 A JP18599283 A JP 18599283A JP H0514086 B2 JPH0514086 B2 JP H0514086B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- secondary air
- engine
- cylinder
- cylinders
- 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 - Lifetime
Links
- 238000000746 purification Methods 0.000 claims description 14
- 235000014676 Phragmites communis Nutrition 0.000 description 31
- 239000007789 gas Substances 0.000 description 21
- 238000007254 oxidation reaction Methods 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
-
- 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
Description
【発明の詳細な説明】
本発明は自動二輪車の前後Ｖ型エンジンの排気
浄化装置に関する。ガソリンエンジンの排気浄化
手段として、エンジン排気中のHC，COを排気系
で高温酸化させる方式があるが、本発明はこのよ
うな方式の排気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 purification device for front and rear V-type engines of motorcycles. As an exhaust purification means for a gasoline engine, there is a method in which HC and CO in the engine exhaust are oxidized at high temperature in the exhaust system, and the present invention relates to an exhaust purification device of this type.
このような排気高温酸化方式においては、不足
の酸素を供給するため、エンジンの排気弁の直後
で排気の流れに対向して２次空気を噴射すること
が行われている。そして必要に応じサーマルリア
クタや酸化触媒を併用して排気を完全燃焼させて
いる。排気が酸化反応を継続するためには高温が
必要で、排気を高温に保てれば効果的な酸化を実
現できるが、排気温度が低いと反応が遅くなる。
排気中のCO，HCを低温で酸化させるためには十
分なO2濃度が必要である。 In such an exhaust gas high temperature oxidation system, in order to supply insufficient oxygen, secondary air is injected immediately after the exhaust valve of the engine, facing the flow of exhaust gas. The exhaust gas is then completely combusted using a thermal reactor and oxidation catalyst as necessary. A high temperature is required for the exhaust gas to continue the oxidation reaction, and if the exhaust gas can be kept at a high temperature, effective oxidation can be achieved, but if the exhaust temperature is low, the reaction will be slow.
Sufficient O 2 concentration is required to oxidize CO and HC in exhaust gas at low temperatures.
ところで、気筒を前後２列にＶ型に配置した自
動二輪車のエンジンにおいては、通常、前列の気
筒の排気管はエンジンの前方に、後列の気筒の排
気管はエンジンの後方に配置されるので、前列の
気筒の排気管は進行方向前面から見て曝露され、
従つて走行中前方からの空気の流れに直接さらさ
れ、排気が冷却され易い。一方、後列の気筒の排
気管は前方にラジエーター、キヤブレターさらに
エンジン本体等が存在するので、上記排気管のよ
うに進行方向前面から見て曝露されることなく、
従つて走行中前方からの冷たい空気にさらされる
ことがなく、排気は高温に維持される。従つて前
述した排気の高温酸化反応すなわち排気中の未燃
物質の再燃焼は、後列気筒の排気管内ではそのま
ま継続可能である。 By the way, in a motorcycle engine in which cylinders are arranged in two rows in a V-shape, front and rear, the exhaust pipes of the cylinders in the front row are usually arranged at the front of the engine, and the exhaust pipes of the cylinders in the rear row are arranged at the rear of the engine. The exhaust pipes of the front row cylinders are exposed when viewed from the front in the direction of travel.
Therefore, while the vehicle is running, it is directly exposed to the air flow from the front, and the exhaust gas is easily cooled. On the other hand, the exhaust pipes of the rear row cylinders have the radiator, carburetor, and engine body in front, so they are not exposed when viewed from the front in the direction of travel like the above exhaust pipes.
Therefore, while driving, the vehicle is not exposed to cold air from the front, and the exhaust gas is maintained at a high temperature. Therefore, the above-described high-temperature oxidation reaction of the exhaust gas, that is, the re-combustion of unburned substances in the exhaust gas, can continue as is in the exhaust pipe of the rear row cylinder.
従来、自動二輪車用前後Ｖ型エンジンにおい
て、前後すべての気筒の排気通路に排気浄化のた
めの２次空気を注入するものが提案されている。
しかし上記のように、後列気筒の排気は十分高温
を維持し、そのままでも未燃分の酸化反応が継続
される。 BACKGROUND ART Conventionally, front and rear V-type engines for motorcycles have been proposed in which secondary air is injected into exhaust passages of all front and rear cylinders for exhaust purification.
However, as described above, the exhaust gas from the rear cylinders maintains a sufficiently high temperature, and the oxidation reaction of unburned components continues.
従つて、本発明は、後列気筒の排気通路には２
次空気を注入せず、排気が冷却し易い前列気筒の
排気通路にだけ２次空気を注入しようとするもの
である。従つて本発明においては、後列気筒の排
気はそれ自身の高温で酸化反応を維持し、前列気
筒の排気は２次空気通路の注入により酸素濃度が
上がることにより酸化反応が促進される。 Therefore, in the present invention, there are two exhaust passages in the rear row cylinder.
This system does not inject secondary air, but rather injects secondary air only into the exhaust passages of the front row cylinders where the exhaust gas is easily cooled. Therefore, in the present invention, the exhaust gas from the rear row cylinders maintains the oxidation reaction at its own high temperature, and the oxidation reaction in the exhaust gas from the front row cylinders is promoted by increasing the oxygen concentration due to injection into the secondary air passage.
排気通路に２次空気を導入するには排気ポート
に連通する２次空気通路をエンジンに加工し、制
御弁等を設けた排気浄化用２次空気供給系をこの
２次空気通路に接続するが、本発明によれば、排
気管が進行方向前面から見て曝露されない後列気
筒にはこのような手段を講ずる必要がないので、
エンジン全体として加工工数および部品点数が削
減されてコストが低下し、しかも十分な排気浄化
効果が得られる。 In order to introduce secondary air into the exhaust passage, a secondary air passage communicating with the exhaust port is machined into the engine, and a secondary air supply system for exhaust purification equipped with a control valve etc. is connected to this secondary air passage. According to the present invention, there is no need to take such measures for rear row cylinders whose exhaust pipes are not exposed when viewed from the front in the direction of travel.
The number of machining steps and number of parts for the engine as a whole is reduced, resulting in lower costs, and a sufficient exhaust purification effect can be obtained.
以下図示の実施例により本発明を説明する。 The present invention will be explained below with reference to the illustrated embodiments.
第１図は本発明による排気浄化装置を備えた自
動二輪車の側面図で、１はエンジンを示す。エン
ジン１は前後Ｖ型４サイクル水冷エンジンで、前
列の気筒２と後列の気筒３とが前後にＶ形に配列
されている。前列気筒２の排気口は該気筒の前部
に設けられており、この排気口から前方排気管４
がエンジン１を下方に迂回して集合室５に接続さ
れている。後列気筒３の排気口は該気筒の後部に
設けられており、この排気口から後方排気管６が
エンジン１の後方を下方へ向かい、前記集合室５
に接続されている。排気は集合室５からマフラー
７を通つて車体後方へ排出される。８はキヤブレ
ターで、エアクリーナーを通つた空気はこのキヤ
ブレター８を経てエンジンに吸入される。９はラ
ジエーターである。 FIG. 1 is a side view of a motorcycle equipped with an exhaust gas purification device according to the present invention, and 1 indicates an engine. The engine 1 is a front-rear V-type four-stroke water-cooled engine, in which cylinders 2 in the front row and cylinders 3 in the rear row are arranged in a V-shape in the front and rear. The exhaust port of the front row cylinder 2 is provided at the front part of the cylinder, and the front exhaust pipe 4 is connected from this exhaust port.
is connected to the collecting room 5 by bypassing the engine 1 downward. The exhaust port of the rear row cylinder 3 is provided at the rear of the cylinder, and a rear exhaust pipe 6 from this exhaust port goes downward behind the engine 1 and connects to the collecting chamber 5.
It is connected to the. Exhaust gas is discharged from the collection chamber 5 through the muffler 7 to the rear of the vehicle body. 8 is a carburetor, and the air that has passed through the air cleaner is sucked into the engine via this carburetor 8. 9 is a radiator.
前列気筒２の排気口の近くに排気浄化用２次空
気供給系の一部を構成するリード弁装置１０が設
けられている。リード弁装置１０は給気管１１に
よつて前列気筒２の排気ポートに連通している。
リード弁装置１０にはまた、前記エアクリーナー
から制御弁を経て空気をこの装置１０に導く空気
導管が接続されているが、これらは図示してい
い。 A reed valve device 10 that constitutes a part of a secondary air supply system for exhaust gas purification is provided near the exhaust port of the front row cylinder 2. The reed valve device 10 communicates with the exhaust port of the front row cylinder 2 through an intake pipe 11.
Also connected to the reed valve device 10 is an air conduit which conducts air from the air cleaner to the device 10 via a control valve, but these may be shown.
第２図および第３図に、第１図のリード弁装置
１０を拡大して詳細に示してある。これらの図面
から分るように、リード弁装置１０は前列気筒２
のシリンダーヘツド１２に一体に突設された取付
座１３に、ステー１４を介してボルト１５，１６
により取り付けられている。このリード弁装置１
０は弁室体１７と蓋体１８とをボルト１９で一体
に締結して成るハウジングを有し、このハウジン
グ内にリード弁２０が前記弁室体１７と蓋体１８
とに挾まれて納められている。リード弁２０は、
弁室体１７と蓋体１８とにゴム部片２１を介して
挾着された弁座部材２２と、この弁座部材２２に
ねじ２３によつて取り付けられた剛性のリードス
トツパ２４と、弁座部材２２とリードストツパ２
４の間に挾持された薄い鋼板製で可撓性のリード
２５とから成つている。弁室体１７には空気入口
２６が設けられており、この空気入口は前記の図
示してない空気導管を通じてエアクリーナーに接
続されている。蓋体１８には空気出口２７が設け
られている。この空気出口２７には給気管１１が
接続されており、給気管１１の他端はシリンダー
ヘツド１２の下面に設けられた２次空気取入口２
８に接続されている。シリンダーヘツド１２の壁
体内にはこの２次空気取入口２８から２次空気通
路２９が穿設されており、この２次空気通路２９
の先端は排気ポート３０に排気弁の近くで開口３
１している。３２は排気弁のバルブガイドであ
る。 2 and 3, the reed valve device 10 of FIG. 1 is shown in enlarged detail. As can be seen from these drawings, the reed valve device 10 is connected to the front row cylinder 2.
Bolts 15 and 16 are attached to a mounting seat 13 integrally projecting from the cylinder head 12 of the cylinder via a stay 14.
It is attached by. This reed valve device 1
0 has a housing in which a valve chamber body 17 and a lid body 18 are integrally fastened together with a bolt 19, and a reed valve 20 is installed in this housing.
It is placed between the two. The reed valve 20 is
A valve seat member 22 is attached to the valve chamber body 17 and the lid body 18 via a rubber piece 21, a rigid lead stopper 24 is attached to the valve seat member 22 with a screw 23, and a valve seat member. 22 and lead stopper 2
4 and a flexible lead 25 made of thin steel plate sandwiched between the leads 25 and 4. The valve chamber body 17 is provided with an air inlet 26, which is connected to the air cleaner through the aforementioned air conduit (not shown). The lid body 18 is provided with an air outlet 27. An air supply pipe 11 is connected to this air outlet 27, and the other end of the air supply pipe 11 is connected to a secondary air intake port 2 provided on the lower surface of the cylinder head 12.
8 is connected. A secondary air passage 29 is bored in the wall of the cylinder head 12 from this secondary air intake port 28.
The tip of the opening 3 is connected to the exhaust port 30 near the exhaust valve.
1. 32 is a valve guide of the exhaust valve.
次にこの装置の作動について述べると、エンジ
ンの運転中、排気弁の開閉により排気ポート３０
内の排気圧は脈動するが、この脈動圧が２次空気
通路２９、２次空気取入口２８、給気管１１およ
び空気出口２７を通つて、リード弁装置１０の蓋
体１８側に伝達され、この脈動圧に応じてリード
弁２０が開閉する。すなわち、蓋体１８側の圧力
が弁室体１７側の圧力より高ければリード弁２５
が弁座部材２２上に着座してリード弁２０は閉
じ、蓋体１８側の圧力が低ければリード２５は弁
座部材２２を離れてリードストツパ２４に接触す
るまで持ち上げられリード弁２０は開く。リード
弁２０が開くと、図示していないエアクリーナー
から空気導管を経て空気入口２６に導かれた２次
空気がリード弁２０を通過して開口３１から排気
ポート３０内に噴射される。この２次空気はシリ
ンダーからの排気の流れに対向する向きに噴射さ
れるので、排気とよく混合し、該排気中の未燃分
の再燃焼を促進しながら排気管４に流入する。 Next, to describe the operation of this device, during engine operation, the exhaust port 30 is opened and closed by opening and closing the exhaust valve.
The exhaust pressure inside pulsates, and this pulsating pressure is transmitted to the lid 18 side of the reed valve device 10 through the secondary air passage 29, the secondary air intake 28, the air supply pipe 11, and the air outlet 27, The reed valve 20 opens and closes in response to this pulsating pressure. That is, if the pressure on the lid body 18 side is higher than the pressure on the valve chamber body 17 side, the reed valve 25
is seated on the valve seat member 22, and the reed valve 20 is closed.If the pressure on the lid body 18 side is low, the reed 25 leaves the valve seat member 22 and is lifted until it comes into contact with the reed stopper 24, and the reed valve 20 opens. When the reed valve 20 opens, secondary air led from an air cleaner (not shown) to the air inlet 26 via an air conduit passes through the reed valve 20 and is injected into the exhaust port 30 from the opening 31. Since this secondary air is injected in a direction opposite to the flow of exhaust gas from the cylinder, it mixes well with the exhaust gas and flows into the exhaust pipe 4 while promoting re-burning of unburned components in the exhaust gas.
このような２次空気導入装置は前列の気筒にだ
け設け、排気が冷却されることが少なく、高温を
維持できる後列の気筒には設けない。なお必要に
応じサーマルアクタまたは触媒室を排気管中に介
在させても良い。 Such a secondary air introduction device is provided only in the front row cylinders, and is not provided in the rear row cylinders, where the exhaust gas is rarely cooled and can maintain a high temperature. Note that a thermal actor or a catalyst chamber may be interposed in the exhaust pipe if necessary.
本発明の他の実施例を第４図および第５図に示
してある。この実施例におけるエンジンは気筒を
前後に２個ずつ配した前後Ｖ型４気筒エンジン
で、かつ１気筒につき２個ずつの吸気弁および排
気弁を備えたものである。第４図シリンダーヘツ
ドとこれに接続されたリード弁装置を下方から見
た図面で、１２Ｌは前列左側の気筒のシリンダー
ヘツド、１２Ｒは前列右側の気筒のシリンダーヘ
ツドである。３３は排気弁の弁座で、各シリンダ
ーヘツドに２つずつ設けられている。そして各シ
リンダーヘツド１２Ｌ，１２Ｒにそれぞれ第２図
と同様な２次空気取入口２８が設けられており、
これらの２次空気取入口２８から第２図と同様な
２次空気通路２９が設けられているが、この２次
空気通路２９は２つの通路部分２９1，２９2に分
岐し、それぞれ各排気弁の直後で各排気ポート部
分３０1，３０2に開口している。３４はリード弁
装置で、第２，３図のリード弁装置１０と同様に
ステー１４とボルト１５，１６によつて、シリン
ダーヘツド１２Ｌ，１５Ｒの中間位置の前方に配
設されている。このリード弁装置３４のハウジン
グは第５図に示すように中央の弁室体３５の左右
両側にそれぞれ蓋体３６，３６を４個のボルト３
７で一体に締結して構成され、内部に第３図と同
じ構造のリード弁２０が２個納められている。そ
して弁室体３５には第３図と同様な空気入口２６
が設けられており、各蓋体３６にはそれぞれ第３
図と同様な空気出口２７が設けられている。これ
らの空気出口２７はそれぞれ可撓性のホース３８
を介して給気管１１に接続され、これらの給気管
１１はそれぞれシリンダーヘツド１２Ｌ，１２Ｒ
の前記２次空気取入口２８に接続されている。こ
の実施例の作用は、２つの気筒の中間に設けた１
つのリード弁装置３４によつて、前記２つの気筒
に２次空気を供給する以外は、第２，３図の実施
例と全く同様である。 Another embodiment of the invention is shown in FIGS. 4 and 5. The engine in this embodiment is a front and rear V-type four-cylinder engine with two cylinders arranged in the front and rear, and each cylinder is provided with two intake valves and two exhaust valves. FIG. 4 is a view of the cylinder head and the reed valve device connected thereto, seen from below, where 12L is the cylinder head of the cylinder on the left side of the front row, and 12R is the cylinder head of the cylinder on the right side of the front row. Reference numeral 33 designates exhaust valve seats, two of which are provided on each cylinder head. Each cylinder head 12L, 12R is provided with a secondary air intake port 28 similar to that shown in FIG.
A secondary air passage 29 similar to the one shown in FIG . Immediately after the valve it opens into each exhaust port portion 30 1 , 30 2 . Reference numeral 34 denotes a reed valve device, which is disposed in front of the intermediate position between the cylinder heads 12L and 15R by means of the stay 14 and bolts 15 and 16, similar to the reed valve device 10 shown in FIGS. As shown in FIG. 5, the housing of this reed valve device 34 has cover bodies 36, 36 attached to the left and right sides of a central valve chamber body 35 by four bolts 3, respectively.
7, and two reed valves 20 having the same structure as that shown in FIG. 3 are housed inside. The valve chamber body 35 has an air inlet 26 similar to that shown in FIG.
is provided, and each lid body 36 is provided with a third
An air outlet 27 similar to the figure is provided. Each of these air outlets 27 is connected to a flexible hose 38.
These air supply pipes 11 are connected to cylinder heads 12L and 12R, respectively.
is connected to the secondary air intake port 28 of. The operation of this embodiment is based on the one provided between the two cylinders.
The embodiment is exactly the same as the embodiment shown in FIGS. 2 and 3, except that secondary air is supplied to the two cylinders by one reed valve device 34.
第６図および第７図に示す実施例は、リード弁
装置を上記各実施例におけるようにエンジンと別
体にせず、エンジン本体と一体にしたものであ
る。すなわち本実施例においてはシリンダーブロ
ツク３９に凹所４０を設け、この凹所４０の開口
部の段部４２にリード弁２０を嵌め込み、前記各
実施例における弁室体１７に相当する蓋部材４１
との間にこのリード弁を挾着し、蓋部材４１を抑
え枠４３を介してボルト４４で締め付けてある。
蓋部材４１には前記各実施例の空気入口２６に相
当する空気入口４５が設けられている。また凹所
４０の底部から、シリンダーブロツク３９の壁体
内を貫通する連通路４６が穿設されている。この
連通路４６はシリンダーヘツド１２の下面に設け
られた前記２次空気取入口２８に連通し、前記各
実施例における給気管１１に相当する。このよう
にリード弁装置をエンジン本体に一体に形成する
ことにより、リード弁装置をステー等を介してエ
ンジン本体に取り付ける必要がなく、エンジン全
体がコンパクトになり、空間を有効に利用でき
る。 In the embodiments shown in FIGS. 6 and 7, the reed valve device is not separated from the engine as in the above embodiments, but is integrated with the engine body. That is, in this embodiment, a recess 40 is provided in the cylinder block 39, the reed valve 20 is fitted into the step 42 of the opening of the recess 40, and the lid member 41 corresponding to the valve chamber body 17 in each of the embodiments described above is fitted.
The reed valve is clamped between the two, and the lid member 41 is tightened with a bolt 44 via a holding frame 43.
The lid member 41 is provided with an air inlet 45 corresponding to the air inlet 26 of each of the embodiments described above. Further, a communication passage 46 is bored from the bottom of the recess 40 to pass through the wall of the cylinder block 39. This communication passage 46 communicates with the secondary air intake port 28 provided on the lower surface of the cylinder head 12, and corresponds to the air supply pipe 11 in each of the embodiments described above. By forming the reed valve device integrally with the engine body in this manner, there is no need to attach the reed valve device to the engine body via a stay or the like, the entire engine becomes compact, and space can be used effectively.
本発明においては、以上のように、気筒を前後
複数列に配置した自動二輪車において、進行方向
前面から見て曝露される排気管を備えた気筒にの
み、排気ポートに連通する２次空気通路を設け、
該２次空気通路に排気浄化用２次空気供給系を接
続し、他の気筒についてはかかる２次空気通路お
よび排気浄化用２次空気供給系を設けないので、
エンジン全体として加工工数および部品点数が削
減されてコストが低下し、しかも十分な排気浄化
効果が得られる。 In the present invention, as described above, in a motorcycle in which cylinders are arranged in multiple rows in the front and rear, the secondary air passage communicating with the exhaust port is provided only in the cylinder equipped with the exhaust pipe that is exposed when viewed from the front in the direction of travel. established,
A secondary air supply system for exhaust purification is connected to the secondary air passage, and such secondary air passage and secondary air supply system for exhaust purification are not provided for other cylinders.
The number of machining steps and number of parts for the engine as a whole is reduced, resulting in lower costs, and a sufficient exhaust purification effect can be obtained.
第１図は本発明の排気浄化装置を備えた自動二
輪車の側面図、第２図は本発明の一実施例を一部
断面で示す側面図、第３図は第２図の−線に
沿う断面図、第４図は他の実施例を示す下面図、
第５図は第４図の−線に沿う断面図、第６図
はさらに他の実施例を示す側断面図、第７図は第
６図の−線に沿う断面図である。
１…エンジン、２…前列気筒、３…後列気筒、
４…前方排気管、５…集合室、６…後方排気管、
７…マフラー、８…キヤブレター、９…ラジエー
ター、１０…リード弁装置、１１…給気管、１２
…シリンダーヘツド、１３…取付座、１４…ステ
ー、１５，１６…ボルト、１７…弁室体、１８…
蓋体、１９…ボルト、２０…リード弁、２１…ゴ
ム部片、２２…弁座部材、２３…ねじ、２４…リ
ードストツパ、２５…リード、２６…空気入口、
２７…空気出口、２８…２次空気取入口、２９…
２次空気通路、３０…排気ポート、３１…開口、
３２…バルブガイド、３３…排気弁座、３４…リ
ード弁装置、３５…弁室体、３６…蓋体、３７…
ボルト、３８…ホース、３９…シリンダーブロツ
ク、４０…凹所、４１…蓋部材、４２…段部、４
３…抑え枠、４４…ボルト、４５…空気入口、４
６…連通路。
Fig. 1 is a side view of a motorcycle equipped with an exhaust purification device of the present invention, Fig. 2 is a side view partially showing an embodiment of the present invention in cross section, and Fig. 3 is taken along the - line in Fig. 2. A sectional view, FIG. 4 is a bottom view showing another embodiment,
5 is a sectional view taken along line - in FIG. 4, FIG. 6 is a side sectional view showing still another embodiment, and FIG. 7 is a sectional view taken along line - in FIG. 6. 1...Engine, 2...Front row cylinder, 3...Rear row cylinder,
4...Front exhaust pipe, 5...Collection room, 6...Rear exhaust pipe,
7...Muffler, 8...Carburetor, 9...Radiator, 10...Reed valve device, 11...Air supply pipe, 12
...Cylinder head, 13...Mounting seat, 14...Stay, 15, 16...Bolt, 17...Valve chamber body, 18...
Lid body, 19... Bolt, 20... Reed valve, 21... Rubber piece, 22... Valve seat member, 23... Screw, 24... Lead stopper, 25... Lead, 26... Air inlet,
27...Air outlet, 28...Secondary air intake, 29...
Secondary air passage, 30...exhaust port, 31...opening,
32... Valve guide, 33... Exhaust valve seat, 34... Reed valve device, 35... Valve chamber body, 36... Lid body, 37...
Bolt, 38... Hose, 39... Cylinder block, 40... Recess, 41... Lid member, 42... Step part, 4
3... Holding frame, 44... Bolt, 45... Air inlet, 4
6...Communication path.
Claims (1)
いて、進行方向前面から見て曝露される排気管を
備えた気筒にのみ、排気ポートに連通する２次空
気通路を設け、該２次空気通路に排気浄化用２次
空気供給系を接続したことを特徴とする自動二輪
車用エンジンの排気浄化装置。1. In a motorcycle in which cylinders are arranged in multiple rows in the front and rear, a secondary air passage communicating with an exhaust port is provided only in the cylinder equipped with an exposed exhaust pipe when viewed from the front in the direction of travel, and an exhaust pipe is provided in the secondary air passage. An exhaust purification device for a motorcycle engine, characterized in that a secondary air supply system for purification is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58185992A JPS6079115A (en) | 1983-10-06 | 1983-10-06 | Exhaust gas purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58185992A JPS6079115A (en) | 1983-10-06 | 1983-10-06 | Exhaust gas purification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6079115A JPS6079115A (en) | 1985-05-04 |
| JPH0514086B2 true JPH0514086B2 (en) | 1993-02-24 |
Family
ID=16180467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58185992A Granted JPS6079115A (en) | 1983-10-06 | 1983-10-06 | Exhaust gas purification device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6079115A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4093512B2 (en) * | 1998-11-25 | 2008-06-04 | 本田技研工業株式会社 | Secondary air supply device for engine exhaust |
| JP4540762B2 (en) * | 1999-01-18 | 2010-09-08 | 本田技研工業株式会社 | Saddle-type vehicle with exhaust secondary air valve |
| JP2005518579A (en) | 2002-01-31 | 2005-06-23 | インスツルメンテル リミテッド | Reverse search system and method |
| JP5185866B2 (en) * | 2009-03-26 | 2013-04-17 | 株式会社クボタ | Check valve for engine fuel passage |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5546009A (en) * | 1978-09-25 | 1980-03-31 | Yamaha Motor Co Ltd | Exhaust gas purifying secondary air supply system for engine |
-
1983
- 1983-10-06 JP JP58185992A patent/JPS6079115A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5546009A (en) * | 1978-09-25 | 1980-03-31 | Yamaha Motor Co Ltd | Exhaust gas purifying secondary air supply system for engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6079115A (en) | 1985-05-04 |
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