JPS6361492B2 - - Google Patents
Info
- Publication number
- JPS6361492B2 JPS6361492B2 JP56197888A JP19788881A JPS6361492B2 JP S6361492 B2 JPS6361492 B2 JP S6361492B2 JP 56197888 A JP56197888 A JP 56197888A JP 19788881 A JP19788881 A JP 19788881A JP S6361492 B2 JPS6361492 B2 JP S6361492B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- secondary air
- internal combustion
- combustion engine
- exhaust system
- 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
Links
- 235000014676 Phragmites communis Nutrition 0.000 claims description 31
- 238000002485 combustion reaction Methods 0.000 claims description 20
- 238000000746 purification Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 description 13
- 238000005192 partition Methods 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
-
- 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
- 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
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/04—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for motorcycles
-
- 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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
-
- 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に搭載される内燃機関の排
気系に連通される二次空気供給系の途中にリード
弁装置を介装し、このリード弁装置を前記排気系
内に生じる排気脈動圧に応じて開閉作動し、前記
排気系に二次空気を供給するようにした排気浄化
装置付内燃機関を搭載した自動二輪車に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention includes a reed valve device interposed in the middle of a secondary air supply system that communicates with the exhaust system of an internal combustion engine mounted on a motorcycle, and the reed valve device is inserted into the exhaust system. The present invention relates to a motorcycle equipped with an internal combustion engine equipped with an exhaust purification device that opens and closes in response to exhaust pulsation pressure generated in the exhaust system to supply secondary air to the exhaust system.
従来前記自動二輪車は公知である（特開昭55−
164716号公報、特開昭55−160112号公報、実公昭
56−50100号公報参照）。 The above-mentioned motorcycle is conventionally known (Japanese Patent Application Laid-open No. 1983-
Publication No. 164716, Japanese Unexamined Patent Application Publication No. 160112/1983, Publication No. 164716, Publication No. 160112
(See Publication No. 56-50100).
ところで自動二輪車では、車体フレームに搭載
される内燃機関は外部に露出しており、しかも車
体フレームの内燃機関周囲には機関補機その他の
機器類が空間を残さないようにぎつしりと配設さ
れているので、前記排気浄化装置を内燃機関に付
設するにあたつて、
リード弁装置や配管群が前記機器類のレイア
ウトやメンテナンスに支障のないようにするこ
と、
リード弁装置や配管群が外乱から保護される
こと、
配管群のリード弁装置への接続、およびその
取回しをできるだけ簡単にすること、
等が要求されるが、前記従来のものでは前記要求
に対する対策が十分でなく、前記要求を満し得る
ものはなかつた。 By the way, in motorcycles, the internal combustion engine mounted on the body frame is exposed to the outside, and engine auxiliaries and other equipment are arranged tightly around the internal combustion engine in the body frame so as not to leave any space. Therefore, when attaching the exhaust gas purification device to an internal combustion engine, make sure that the reed valve device and the piping group do not interfere with the layout and maintenance of the equipment, and that the reed valve device and the piping group are free from disturbance. The connection of the piping group to the reed valve device and its routing are required to be as simple as possible; however, the conventional systems do not have sufficient measures to meet the requirements, and There was nothing that could meet my demands.
本発明は前記実情にかんがみてなされたもの
で、前記要求を満すことのできる、構成簡単な排
気浄化装置付内燃機関を搭載した自動二輪車を提
供することを目的とするものである。 The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a motorcycle equipped with an internal combustion engine equipped with a simple exhaust purification device that can satisfy the above-mentioned requirements.
本発明によれば、前記目的達成のため車体フレ
ームに搭載される内燃機関の排気系に二次空気供
給系を連通し、該二次空気供給系の途中に、前記
排気系内に生じる排気脈動圧に応動して開閉制御
されて前記排気系内に排気浄化用二次空気を供給
するようにしたリード弁装置を介装してなる自動
二輪車において、前記内燃機関の機関本体は、上
下方向に延びるシリンダ部と、これに連接されて
後方に延長されるクランクケース部とを有して側
面視Ｌ字状に形成され、前記内燃機関の後方に
は、前記シリンダ部とクランクケース部とで画成
される死空間を形成し、前記シリンダ部の前面に
開口した排気ポートに接続した排気系は前記シリ
ンダ部の一側方を迂回してその後半部を前記死空
間の側方まで延長させ、一方前記リード弁装置
を、前記死空間内で、前記クランクケース部上
に、前記排気系の後半部と略同一レベルに配設し
てこれを機関本体のシリンダ部とクランクケース
部、前記排気系の後半部、および吸気系のエアク
リーナによつて取囲み、前記リード弁装置には流
入ポートと略同一レベルに位置する複数の流出ポ
ートを開口し、前記流入ポートを二次空気供給主
管を介して大気に、また前記流出ポートを前記排
気系にそれぞれ二次空気供給管を介して連通す
る。 According to the present invention, in order to achieve the above object, a secondary air supply system is connected to an exhaust system of an internal combustion engine mounted on a vehicle body frame, and exhaust pulsation occurring in the exhaust system is caused in the middle of the secondary air supply system. In a motorcycle equipped with a reed valve device that is controlled to open and close in response to pressure to supply secondary air for exhaust purification into the exhaust system, the engine main body of the internal combustion engine is vertically The internal combustion engine is formed into an L-shape in side view, having an extending cylinder part and a crankcase part connected to the cylinder part and extending rearward. an exhaust system connected to an exhaust port opened on the front surface of the cylinder part bypasses one side of the cylinder part and extends its rear half to the side of the dead space, On the other hand, the reed valve device is disposed in the dead space on the crankcase section at approximately the same level as the rear half of the exhaust system, so that the reed valve device is connected to the cylinder section of the engine body, the crankcase section, and the exhaust system. The reed valve device has a plurality of outflow ports located at approximately the same level as the inflow port, and the inflow port is connected to the inflow port via a secondary air supply main pipe. The outlet port is communicated with the atmosphere and with the exhaust system via a secondary air supply pipe, respectively.
以下、図面により本発明の一実施例について説
明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図において、実動二輪車の車体フレームＦ
には、その走行用内燃機関Ｅが搭載される。前記
機関Ｅの機関本体は、上下方向にのびるシリンダ
部１とその下部に連通されるクランクケース部４
とよりなり、全体として第２図に示すように側面
視Ｌ字状に形成されている。機関本体のシリンダ
部１のシリンダヘツド３背面には吸気ポート５，
５が開口され、それらの吸気ポート５，５には車
体フレームＦの後方に延在するキヤブレタ６およ
びエアクリーナ７が接続される。また機関本体の
シリンダヘツド３の前面には２つの排気ポート
８，８が開口され、それらの排気ポート８，８に
は排気管Exが連通接続される。 In Fig. 1, the body frame F of the actual motorcycle
is equipped with an internal combustion engine E for driving. The engine body of the engine E includes a cylinder section 1 extending in the vertical direction and a crankcase section 4 communicating with the lower part of the cylinder section 1.
As a whole, as shown in FIG. 2, it is formed into an L-shape when viewed from the side. There is an intake port 5 on the back of the cylinder head 3 of the cylinder part 1 of the engine body.
5 is opened, and a carburetor 6 and an air cleaner 7 extending to the rear of the vehicle body frame F are connected to these intake ports 5,5. Further, two exhaust ports 8, 8 are opened in the front face of the cylinder head 3 of the engine body, and an exhaust pipe Ex is connected to these exhaust ports 8, 8 in communication.
前記排気管Exは２本の前記排気管９，９の後
端に１本の後部排気管１０を一体に接続して構成
されている。２本の前部排気管９，９はシリンダ
部１の前部からその側方を迂回してその側部に沿
うように彎曲形成され、その前部開口端は排気ポ
ート８，８に連通接続され、またその後部開口端
は集合されて後部排気管１０に溶接結合されてお
り、該後部排気管１０はシリンダ部１の後方へと
延長される。而して後部排気管１０は断熱材によ
り囲繞され、そこを流れる排気が保温されるよう
になつている。前記後部排気管１０の後端には、
排気マフラＭ（第１図）が接続され、この排気マ
フラＭ内には必要に応じて触媒コンバータが内蔵
される。また前記後部排気管１０の外側にはその
外側半部を覆うようにプロテクタ１１が設けられ
る。そして内燃機関Ｅの排気系は前記排気ポート
８，８、前部排気管９，９、後部排気管１０およ
び排気マフラＭより構成される。 The exhaust pipe Ex is constructed by integrally connecting one rear exhaust pipe 10 to the rear ends of the two exhaust pipes 9, 9. The two front exhaust pipes 9, 9 are curved from the front part of the cylinder part 1, detouring around the sides thereof, and are curved along the sides thereof, and the front opening ends thereof are connected in communication with the exhaust ports 8, 8. The rear open ends of the exhaust pipes are assembled and welded to a rear exhaust pipe 10, and the rear exhaust pipe 10 is extended to the rear of the cylinder portion 1. The rear exhaust pipe 10 is surrounded by a heat insulating material so that the exhaust gas flowing therein is kept warm. At the rear end of the rear exhaust pipe 10,
An exhaust muffler M (FIG. 1) is connected, and a catalytic converter is built in the exhaust muffler M as required. Further, a protector 11 is provided on the outside of the rear exhaust pipe 10 so as to cover the outside half thereof. The exhaust system of the internal combustion engine E is comprised of the exhaust ports 8, 8, front exhaust pipes 9, 9, rear exhaust pipe 10, and exhaust muffler M.
前記排気系に排気浄化用二次空気を供給するた
めの二次空気系の途中には、リード弁装置Ｌが介
装されている。 A reed valve device L is interposed in the middle of the secondary air system for supplying secondary air for exhaust purification to the exhaust system.
次にこのリード弁装置Ｌの構造について主に第
５，６図により説明すると、前記リード弁装置Ｌ
は、機関本体の、シリンダ部１とクランクケース
部４、排気管Exおよびエアクリーナ７によつて
囲まれた死空間Ｄにおいて機関本体のクランクケ
ース部４上に取付けられており、平面よりみて略
Ｔ字状をなして、その中央部に上流室ｕが形成さ
れるとともにその端部には前記上流室ｕに対して
３つの下流室d1，d2，d3が略同一平面内において
放射状に形成され、上流室ｕと下流室d1，d2，d3
間とは、それぞれ弁ケース１２に取付けられるリ
ード弁体１３1，１３2，１３3によつて区画され
る。リード弁体１３1，１３2，１３3は、それぞ
れ弁孔１４を開口した弁座体１５上に、その弁孔
１４を開閉するリード１６を取付けて構成されて
いる。前記上流室ｕには流入ポート１７が開口さ
れ、この流入ポート１７にはエアクリーナ７を介
して大気に開口する二次空気供給主管１８が連通
され、この主管１８の途中には、エアコントロー
ル弁１９が介在される。このエアコントロール弁
１９は従来公知のもので、前記排気系内に二次空
気の供給が不要のとき閉弁されるように制御され
る。また前記３つの下流室d1，d2，d3には、それ
ぞれ流出ポート２０1，２０2，２０3が開口され、
そのうち２つの流出ポート２０1，２０2には、二
次空気供給管２１，２１の一端が連通される。前
記二次空気供給管２１，２１は機関本体に向つて
前方にのび、その他端がそのシリンダブロツク２
の側面に接続され、機関本体に形成した二次空気
路２２，２２に連通される。前記二次空気２２，
２２はシリンダブロツク２とシリンダヘツド３に
亘つて穿設され、その上端は、排気ポート８，８
の排気弁近傍部に開口している。また他の１つの
流出ポート２０3には、他の二次空気供給管２３
の一端が接続される。この二次空気供給管２３
は、前記後部排気管１０に沿つて前方にのびその
他端が、その後部排気管１０内に開口される。 Next, the structure of this reed valve device L will be explained mainly with reference to FIGS.
is installed on the crankcase part 4 of the engine body in a dead space D surrounded by the cylinder part 1, crankcase part 4, exhaust pipe Ex, and air cleaner 7, and is approximately T when viewed from above. The upstream chamber u is formed in the center of the shape, and three downstream chambers d 1 , d 2 , d 3 are formed radially in substantially the same plane at the ends of the upstream chamber u. The upstream chamber u and the downstream chamber d 1 , d 2 , d 3 are formed.
The space is defined by reed valve bodies 13 1 , 13 2 , and 13 3 attached to the valve case 12, respectively. The reed valve bodies 13 1 , 13 2 , and 13 3 each have a valve seat body 15 with a valve hole 14 opened thereon, and a reed 16 for opening and closing the valve hole 14 attached thereto. An inflow port 17 is opened in the upstream chamber u, and a secondary air supply main pipe 18 that opens to the atmosphere via the air cleaner 7 is communicated with the inflow port 17. is mediated. This air control valve 19 is conventionally known and is controlled to be closed when there is no need to supply secondary air into the exhaust system. Furthermore, outflow ports 20 1 , 20 2 , and 20 3 are opened in the three downstream chambers d 1 , d 2 , and d 3 , respectively.
One ends of secondary air supply pipes 21 and 21 are communicated with two of the outflow ports 20 1 and 20 2 . The secondary air supply pipes 21, 21 extend forward toward the engine body, and the other end is connected to the cylinder block 2.
It is connected to the side surface of the engine body and communicates with secondary air passages 22, 22 formed in the engine body. the secondary air 22,
22 is bored across the cylinder block 2 and cylinder head 3, and its upper end is connected to the exhaust ports 8, 8.
It opens near the exhaust valve. In addition, another secondary air supply pipe 23 is connected to the other outflow port 203 .
One end of is connected. This secondary air supply pipe 23
extends forward along the rear exhaust pipe 10, and the other end thereof is opened into the rear exhaust pipe 10.
リード弁装置Ｌの弁ケース１２内において、排
気ポート８，８に連通する２つの下流室d1，d2
と、後部排気管１０に連通する他の下流室d3とは
相対向しており、それらに対応する上流室d1，d2
とd3は弁ケース１２と一体の隔壁１２ａによつて
仕切られている。そして前記流入ポート１７は前
記隔壁１２ａを跨ぐように開口しており、この流
入ポート１７からの大気は上流室ｕの隔壁１２ａ
の左右両側に分流するようになつている。 In the valve case 12 of the reed valve device L, two downstream chambers d 1 and d 2 communicate with the exhaust ports 8 and 8.
and the other downstream chamber d 3 communicating with the rear exhaust pipe 10 are opposite to each other, and the corresponding upstream chambers d 1 and d 2
and d3 are separated by a partition wall 12a that is integral with the valve case 12. The inflow port 17 is opened so as to straddle the partition wall 12a, and the atmosphere from the inflow port 17 is transferred to the partition wall 12a of the upstream chamber u.
The current is divided into both the left and right sides.
次に本発明の一実施例の作用について説明す
る。 Next, the operation of one embodiment of the present invention will be explained.
いま機関Ｅの運転により前記排気系の排気ポー
ト８，８および後部排気管１０内に排気脈動圧が
生じると、これが３本の二次空気供給管２１，２
１および２３を通してリード弁装置Ｌの下流室
d1，d2，d3に作用してリード弁体１３1，１３2１
３3の各リード１６を間歇的に開弁し、エアクリ
ーナ７内の清浄大気は二次空気供給主管１８を通
つてリード弁装置Ｌの上流室ｕに流入し、そこよ
り開弁したリード弁体１３1，１３2，１３3を通
つて下流室d1，d2，d3に流入し、それらより排気
ポート８，８および排気管Exの後部排気管１０
内に導入され、排気系内の未燃成分を浄化除去す
る。 When exhaust pulsating pressure is generated in the exhaust ports 8, 8 and the rear exhaust pipe 10 of the exhaust system due to the operation of the engine E, this is caused by the three secondary air supply pipes 21, 2.
The downstream chamber of the reed valve device L through 1 and 23
Reed valve bodies 13 1 , 13 2 1 act on d 1 , d 2 , d 3
3. Each reed 16 of 3 is opened intermittently, and the clean air inside the air cleaner 7 flows into the upstream chamber u of the reed valve device L through the secondary air supply main pipe 18, and from there the reed valve body which is opened is opened. It flows into the downstream chambers d 1 , d 2 , d 3 through 13 1 , 13 2 , 13 3 , and from these flows into the exhaust ports 8 , 8 and the rear exhaust pipe 10 of the exhaust pipe Ex.
The fuel is introduced into the exhaust system to purify and remove unburned components from the exhaust system.
ところでリード弁装置Ｌはその弁ケース１２中
央に上流室ｕを形成するとともにその上流室ｕに
対して略同一平面内において放射状に３つの下流
室d1，d2，d3が形成されるので、弁ケース１２内
に３個の前記下流室d1，d2，d3を形成したにも拘
らず上流室ｕ内の二次空気は抵抗少なく、最短距
離を通つて円滑に各下流室d1，d2，d3に流入させ
ることができる。また排気ポート８，８に通じる
下流室d1，d2と後部排気管１０に通じる下流室d3
に対応して上流室ｕ内間には隔壁１２ａが介在さ
れるので、排気ポート８，８内と、後部排気管１
０内の排気脈動周期にずれがあつても１つの上流
室ｕ内において排気脈動が減衰されることがなく
排気ポート８，８および後部排気管１０にはぞれ
ぞれ十分な量の二次空気が供給される。 By the way, the reed valve device L forms an upstream chamber u at the center of its valve case 12, and three downstream chambers d 1 , d 2 , d 3 are formed radially in substantially the same plane relative to the upstream chamber u. Although the three downstream chambers d 1 , d 2 , and d 3 are formed in the valve case 12, the secondary air in the upstream chamber u has little resistance and flows smoothly through the shortest distance to each downstream chamber d. 1 , d2 , and d3 . Further, downstream chambers d 1 and d 2 that communicate with the exhaust ports 8 and 8 and downstream chamber d 3 that communicates with the rear exhaust pipe 10
Since a partition wall 12a is interposed between the upstream chamber u and the interior of the upstream chamber u, the interior of the exhaust ports 8 and the rear exhaust pipe 1 are
Even if there is a deviation in the exhaust pulsation period within 0, the exhaust pulsation is not attenuated in one upstream chamber u, and a sufficient amount of secondary air is supplied to each of the exhaust ports 8, 8 and the rear exhaust pipe 10. Air is supplied.
以上のように本発明によれば前記リード弁装置
は内燃機関の後方において、そのシリンダ部とク
ランクケース部とで画成される死空間に配設され
るので、該リード弁装置を他の機器類に邪魔され
ずに、また前記機器類のレイアウトやメンテナン
スに支障を及ぼさずに機関本体に付設することが
できる。 As described above, according to the present invention, the reed valve device is disposed at the rear of the internal combustion engine in the dead space defined by the cylinder section and the crankcase section, so that the reed valve device can be connected to other equipment. It can be attached to the engine main body without being obstructed by the equipment, and without interfering with the layout or maintenance of the equipment.
また前記リード弁装置はシリンダ部とクランク
ケース部、排気系の後半部および吸気系のエアク
リーナによつて取囲まれるので、該リード弁装置
やそこに接続される二次空気供給管は既設の前記
機器によつて外乱から確実に保護され、それらの
損傷が防止される。 Furthermore, since the reed valve device is surrounded by the cylinder section, the crankcase section, the rear half of the exhaust system, and the air cleaner of the intake system, the reed valve device and the secondary air supply pipe connected thereto are The equipment reliably protects it from external disturbances and prevents their damage.
さらにリード弁装置の複数の流出ポートは略同
一レベルに位置しているので、二次空気供給管の
接続、およびそれらの管の取回しがし易くなり、
リード弁装置の内燃機関への組付作業能率および
そのメンテナンス性が大幅に向上する。 Furthermore, since the multiple outflow ports of the reed valve device are located at approximately the same level, it is easier to connect the secondary air supply pipes and route those pipes.
The efficiency of assembling the reed valve device into the internal combustion engine and its maintainability are greatly improved.
第１図は本発明自動二輪車の側面図、第２図は
前記内燃機関の頭部の縦断側面図、第３図は、第
２図−線断面図、第４図は、第２図−線
断面図、第５図は、第３図の一部拡大図、第６図
は、第５図−線断面図である。
Ｄ…死空間、Ｅ…内燃機関、Ｆ…車体フレー
ム、Ｌ…リード弁装置、１…シリンダ部、４…ク
ランクケース部、７…エアクリーナ、８…排気ポ
ート、１７…流入ポート、１８…二次空気供給主
管。
FIG. 1 is a side view of the motorcycle of the present invention, FIG. 2 is a longitudinal sectional side view of the head of the internal combustion engine, FIG. 3 is a sectional view taken along the line of FIG. 2, and FIG. 4 is a sectional view taken along the line of FIG. 2. 5 is a partially enlarged view of FIG. 3, and FIG. 6 is a sectional view taken along the line of FIG. 5. D...Dead space, E...Internal combustion engine, F...Body frame, L...Reed valve device, 1...Cylinder section, 4...Crankcase section, 7...Air cleaner, 8...Exhaust port, 17...Inflow port, 18...Secondary Main air supply pipe.
Claims (1)
気系に二次空気供給系を連通し、該二次空気供給
系の途中に、前記排気系内に生じる排気脈動圧に
応動した開閉制御されて前記排気系内に排気浄化
用二次空気を供給するようにしたリード弁装置Ｌ
を介装してなる自動二輪車において、前記内燃機
関Ｅの機関本体は、上下方向に延びるシリンダ部
１と、これに連接されて後方に延長されるクラン
クケース部４とを有して側面視Ｌ字状に形成さ
れ、前記内燃機関Ｅの後方には、前記シリンダ部
１とクランクケース部４とで画成される死空間Ｄ
を形成し、前記シリンダ部１の前面に開口した排
気ポート８に接続した排気系は前記シリンダ部１
の一側方を迂回してその後半部を前記死空間Ｄの
側方まで延長させ、一方前記リード弁装置Ｌを、
前記死空間Ｄ内で、前記クランクケース部４上
に、前記排気系の後半部と略同一レベルに配設し
てこれを機関本体のシリンダ部１とクランクケー
ス部４、前記排気系の後半部、および吸気系のエ
アクリーナ７によつて取囲み、前記リード弁装置
Ｌには流入ポート１７と略同一レベルに位置する
複数の流出ポート２０1，２０2，２０3を開口し、
前記流入ポート１７を二次空気供給主管１８を介
して大気に、また前記流出ポート２０1，２０2，
２０3を前記排気系にそれぞれ二次空気供給管２
１，２１，２３を介して連通したことを特徴とす
る、排気浄化装置付内燃機関を搭載した自動二輪
車。1. A secondary air supply system is connected to the exhaust system of the internal combustion engine E mounted on the vehicle body frame F, and in the middle of the secondary air supply system, an opening/closing system is controlled in response to the exhaust pulsating pressure generated in the exhaust system. A reed valve device L configured to supply secondary air for exhaust purification into the exhaust system.
In the motorcycle, the engine body of the internal combustion engine E has a cylinder portion 1 extending in the vertical direction, and a crankcase portion 4 connected to the cylinder portion 1 and extending rearward. A dead space D is formed in a letter shape and is defined behind the internal combustion engine E by the cylinder portion 1 and the crankcase portion 4.
, and an exhaust system connected to an exhaust port 8 opened on the front surface of the cylinder section 1
bypassing one side and extending its rear half to the side of the dead space D, while the reed valve device L,
In the dead space D, it is arranged on the crankcase part 4 at approximately the same level as the rear half of the exhaust system, and connects the cylinder part 1 of the engine body, the crankcase part 4, and the rear half of the exhaust system. , and an air cleaner 7 of the intake system, and the reed valve device L has a plurality of outflow ports 20 1 , 20 2 , 20 3 located at approximately the same level as the inflow port 17 ,
The inflow port 17 is connected to the atmosphere via the secondary air supply main pipe 18, and the outflow ports 20 1 , 20 2 ,
20 3 to the exhaust system, respectively, and the secondary air supply pipe 2
1. A motorcycle equipped with an internal combustion engine equipped with an exhaust purification device, characterized in that the internal combustion engine communicates with the exhaust gas purifying device through ports 1, 21, and 23.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56197888A JPS5898619A (en) | 1981-12-09 | 1981-12-09 | Reed valve unit in exhaust gas purifying device for internal combustion engine |
| US06/428,793 US4437306A (en) | 1981-11-25 | 1982-09-30 | Exhaust gas cleaning device of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56197888A JPS5898619A (en) | 1981-12-09 | 1981-12-09 | Reed valve unit in exhaust gas purifying device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5898619A JPS5898619A (en) | 1983-06-11 |
| JPS6361492B2 true JPS6361492B2 (en) | 1988-11-29 |
Family
ID=16381959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56197888A Granted JPS5898619A (en) | 1981-11-25 | 1981-12-09 | Reed valve unit in exhaust gas purifying device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5898619A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55160112A (en) * | 1979-05-29 | 1980-12-12 | Yamaha Motor Co Ltd | Check valve for secondary air feeder |
| JPS55164716A (en) * | 1979-06-08 | 1980-12-22 | Yamaha Motor Co Ltd | Exhausting device for internal combustion engine |
| JPS5650100U (en) * | 1979-09-27 | 1981-05-02 |
-
1981
- 1981-12-09 JP JP56197888A patent/JPS5898619A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55160112A (en) * | 1979-05-29 | 1980-12-12 | Yamaha Motor Co Ltd | Check valve for secondary air feeder |
| JPS55164716A (en) * | 1979-06-08 | 1980-12-22 | Yamaha Motor Co Ltd | Exhausting device for internal combustion engine |
| JPS5650100U (en) * | 1979-09-27 | 1981-05-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5898619A (en) | 1983-06-11 |
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