JPS6221706Y2 - - Google Patents
Info
- Publication number
- JPS6221706Y2 JPS6221706Y2 JP19036880U JP19036880U JPS6221706Y2 JP S6221706 Y2 JPS6221706 Y2 JP S6221706Y2 JP 19036880 U JP19036880 U JP 19036880U JP 19036880 U JP19036880 U JP 19036880U JP S6221706 Y2 JPS6221706 Y2 JP S6221706Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- reed valve
- secondary air
- internal combustion
- valve device
- 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 36
- 238000002485 combustion reaction Methods 0.000 claims description 21
- 238000000746 purification Methods 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 230000010349 pulsation Effects 0.000 claims description 5
- 238000012856 packing Methods 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
- Automatic Cycles, And Cycles In General (AREA)
Description
【考案の詳細な説明】
本考案は自動二輪車の車体フレームに縦置きに
塔載される水平対向型内燃機関に設けられる排気
浄化装置の保護装置に関するものである。[Detailed Description of the Invention] The present invention relates to a protection device for an exhaust gas purification device installed in a horizontally opposed internal combustion engine mounted vertically on the body frame of a motorcycle.
一般に排気浄化装置として、内燃機関の排気系
に、二次空気供給系を連通し、この二次空気供給
系の途中に、排気脈動圧応動式のリード弁装置を
介装し、排気系内に生じる排気脈動圧に応動して
リード弁装置を開閉させ、排気浄化用二次空気を
排気系に導入するようにしたものは既に知られて
いるが、本考案はかゝる排気浄化装置を、自動二
輪車の車体フレームに縦置き、すなわちシリンダ
部が車体フレームの両側方を向くように塔載され
る水平対向型内燃機関に設けた場合に、前記排気
浄化装置を障害物から保護し、併せて内燃機関、
および前記リード弁装置のメンテナンス性を大幅
に向上させることができるようにした、自動二輪
車用内燃機関の排ガス浄化装置の保護装置を得る
ことを主な目的とするものである。 Generally, as an exhaust purification device, a secondary air supply system is connected to the exhaust system of an internal combustion engine, and an exhaust pulsation pressure-responsive reed valve device is interposed in the middle of this secondary air supply system. Although it is already known that a reed valve device is opened and closed in response to the generated exhaust pulsation pressure to introduce secondary air for exhaust purification into the exhaust system, the present invention provides such an exhaust purification device. When installed in a horizontally opposed internal combustion engine that is mounted vertically on the body frame of a motorcycle, that is, with the cylinder section facing both sides of the body frame, the exhaust purification device is protected from obstacles, and internal combustion engine,
Another object of the present invention is to provide a protection device for an exhaust gas purification device for an internal combustion engine for a motorcycle, which can greatly improve the maintainability of the reed valve device.
以下、図面により本考案の１実施例について説
明すると、第１，２図において、自動二輪車Ｖの
車体フレームＦ上に水平対向型４気筒内燃機関Ｅ
が縦置き（クランク軸の軸線を自動二輪車の前後
方向に配置）に塔載され、そのシリンダ部１は車
体フレームＦの両側方を向いている。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, a horizontally opposed four-cylinder internal combustion engine E is mounted on a body frame F of a motorcycle V.
is mounted vertically (the axis of the crankshaft is arranged in the longitudinal direction of the motorcycle), and its cylinder portion 1 faces both sides of the vehicle body frame F.
シリンダ部１のシリンダヘツド２には、第４図
に示すように上半部にピストン３上の燃焼室４に
連通する吸気ポート５が、またその下半部に前記
燃焼室４に連通する排気ポート６が形成され、前
記吸気ポート５は、シリンダヘツド２の上面に、
また前記排気ポート６はシリンダヘツド２の下面
にそれぞれ開口している。吸気ポート５には、機
関本体の上方に配設されるキヤブレタ７、エアク
リーナ８等の吸気系が接続され、また前記排気ポ
ート６には、排気管９、マフラー１０等の排気系
が接続され、マフラー１０の途中には排気浄化用
触媒コンバータ１１が介装されている。 As shown in FIG. 4, the cylinder head 2 of the cylinder section 1 has an intake port 5 in its upper half that communicates with the combustion chamber 4 above the piston 3, and an exhaust port 5 that communicates with the combustion chamber 4 in its lower half. A port 6 is formed, and the intake port 5 is located on the upper surface of the cylinder head 2.
Further, the exhaust ports 6 are opened on the lower surface of the cylinder head 2, respectively. The intake port 5 is connected to an intake system such as a carburetor 7 and an air cleaner 8 disposed above the engine body, and the exhaust port 6 is connected to an exhaust system such as an exhaust pipe 9 and a muffler 10. An exhaust purification catalytic converter 11 is interposed in the middle of the muffler 10.
またシリンダヘツド２には通常のように吸、排
気ポート５，６の、燃焼室４側開口端を開閉する
吸、排気弁１２，１３が設けられ、それらは弁ば
ね１４と動弁機構１５との協働によつて開閉作動
される。 In addition, the cylinder head 2 is provided with intake and exhaust valves 12 and 13 that open and close the opening ends of the intake and exhaust ports 5 and 6 on the combustion chamber 4 side, as usual, and these valve springs 14 and valve train mechanisms 15 are connected to each other. It is opened and closed by the cooperation of the
前記シリンダヘツド２の上面にはパツキン材１
６を介してシリンダヘツドカバー１７が被着され
ている。シリンダヘツドカバー１７の外面には各
シリンダに対応して排気脈動圧応動式のリード弁
装置Ｌが設けられる。 A packing material 1 is provided on the upper surface of the cylinder head 2.
A cylinder head cover 17 is attached via the cylinder head 6. An exhaust pulsation pressure responsive reed valve device L is provided on the outer surface of the cylinder head cover 17, corresponding to each cylinder.
次に前記リード弁装置Ｌの構造を説明すると、
該装置Ｌの弁函１８は、シリンダヘツドカバー１
７の上面に一体的に形成される弁函構成部１８１
と、その上にパツキン１９を介して複数個の取付
ボルト２０により重合固着されるカバー体１８２
とより構成され、カバー体１８２の外面はシリン
ダヘツドカバー１７の上面と滑らかに接続してそ
れらの間に凹凸が形成されないようになつてい
る。前記弁函１８内にはリード弁室Ａが形成され
る。リード弁室Ａ内において、前記弁函構成部１
８１の上面には凹所２１が形成され、この凹所２
１には、断面コ字状の耐熱弾性パツキン２２を介
してリード弁体２３が嵌合される。第３，４図に
示すように前記カバー体１８２の内壁面には複数
個（６個）の突片２４が一体に延設され、これら
の突片２４は、カバー体１８２の、弁函構成部１
８１への重合固着によりリード弁体２３の上面コ
ーナ部に圧接され、弁函構成部１８１と協働して
リード弁体２３を挾持固定することができる。リ
ード弁室Ａ内は、リード弁体２３によつて上流室
ａと下流室ｂとに区画され、またリード弁体２３
に開口した弁口２６を介して上流室ａと下流室ｂ
とが連通される。第４図に明瞭に示すように上流
室ａのリード弁体２３の平面に対面する面積は、
そのリード弁体２３の平面投影面積よりも大きく
形成され、その高さを低く形成しても十分な容積
が得られるようになつている。リード弁体２３
は、その下流室ｂに対面する下面に前記弁口２６
を開閉し得るリード２７およびそのリード２７の
開度を制限するリードストツパ２８が重合され、
それらはリード弁体２３に止めねじ２９によつて
止着される。 Next, the structure of the reed valve device L will be explained.
The valve box 18 of the device L is attached to the cylinder head cover 1.
Valve box component 18 1 integrally formed on the upper surface of 7
and a cover body 18 2 which is superimposed and fixed thereon by a plurality of mounting bolts 20 via a packing 19 .
The outer surface of the cover body 182 is smoothly connected to the upper surface of the cylinder head cover 17 so that no unevenness is formed therebetween. A reed valve chamber A is formed within the valve box 18. In the reed valve chamber A, the valve box component 1
A recess 21 is formed on the upper surface of 8 1 , and this recess 2
1, a reed valve body 23 is fitted through a heat-resistant elastic packing 22 having a U-shaped cross section. As shown in FIGS. 3 and 4, a plurality (six) of protruding pieces 24 are integrally extended on the inner wall surface of the cover body 182 , and these protruding pieces 24 are connected to the valve of the cover body 182 . Box construction part 1
By polymerizing and fixing to 8 1 , the reed valve body 23 is pressed into contact with the upper corner portion of the reed valve body 23, and the reed valve body 23 can be clamped and fixed in cooperation with the valve case component 181 . The inside of the reed valve chamber A is divided into an upstream chamber a and a downstream chamber b by the reed valve body 23.
The upstream chamber a and the downstream chamber b are connected through the valve port 26 opened to the
are communicated. As clearly shown in FIG. 4, the area facing the plane of the reed valve body 23 of the upstream chamber a is:
It is formed to be larger than the planar projected area of the reed valve body 23, so that a sufficient volume can be obtained even if the height is made low. Reed valve body 23
has the valve port 26 on its lower surface facing the downstream chamber b.
A lead 27 that can open and close and a lead stopper 28 that limits the degree of opening of the lead 27 are polymerized,
They are fixed to the reed valve body 23 by a set screw 29.
前記シリンダヘツドカバー１７の上部には、前
記リード弁装置Ｌよりも内方、すなわち車体フレ
ームＦ寄りに前記上流室ａに連通する上流側二次
空気供給路３０が形成され、この供給路３０はシ
リンダヘツドカバー１７の上面の、前記リード弁
装置Ｌよりも内方に開口し、その開口端は接続ジ
ヨイント３１を介して二次空気導入チユーブ３２
に接続されている。二次空気導入チユーブ３２は
その途中に空気コントロール弁３３（第１図）を
介して前記エアクリーナ８の空気清浄室内に連通
されている。前記空気コントロール弁３３は従来
公知のもので、内燃機関の運転により開閉制御さ
れる。 An upstream secondary air supply passage 30 communicating with the upstream chamber a is formed in the upper part of the cylinder head cover 17 inwardly of the reed valve device L, that is, closer to the vehicle body frame F, and this supply passage 30 It opens inward from the reed valve device L on the upper surface of the cylinder head cover 17, and its open end connects to the secondary air introduction tube 32 through the connection joint 31.
It is connected to the. The secondary air introduction tube 32 is communicated with the air cleaning chamber of the air cleaner 8 through an air control valve 33 (FIG. 1) in the middle thereof. The air control valve 33 is a conventionally known valve, and is controlled to open and close according to the operation of the internal combustion engine.
シリンダヘツドカバー１７の下部には、前記リ
ード弁装置Ｌよりも内方、すなわち車体フレーム
Ｆ寄りに前記下流室ｂに連通する下流側の第１二
次空気供給路３４が形成され、この供給路３４
は、シリンダヘツドカバー１７の、シリンダヘツ
ド２への接合面に開口している。またシリンダヘ
ツド２には、その上面に開口し、前記排気ポート
６に連通する下流側の第２二次空気供給路３５が
形成される。前記下流側の第１、第２二次空気供
給路３４，３５は、シリンダヘツド２とシリンダ
ヘツドカバー１７との接合時に、接続ジヨイント
３６によつて接続される。下流側の第１、第２二
次空気供給路３４，３５とは略等径に形成され
る。排気ポート６内に生じる排気脈動圧によつて
生じる吸引力は、リード２７を開いて上流室ａ内
の二次空気を下流室ｂ、第１、第２二次空気供給
路３４，３５を介して排気ポート６内に導入す
る。 A first secondary air supply path 34 on the downstream side communicating with the downstream chamber b is formed inwardly of the reed valve device L, that is, closer to the vehicle body frame F, in the lower part of the cylinder head cover 17, and this supply path 34
is open at the joint surface of the cylinder head cover 17 to the cylinder head 2. Further, a second secondary air supply passage 35 on the downstream side is formed in the cylinder head 2 and opens on the upper surface thereof and communicates with the exhaust port 6. The first and second secondary air supply passages 34 and 35 on the downstream side are connected by a connecting joint 36 when the cylinder head 2 and the cylinder head cover 17 are joined. The first and second secondary air supply passages 34 and 35 on the downstream side are formed to have approximately the same diameter. The suction force generated by the exhaust pulsating pressure generated in the exhaust port 6 opens the lead 27 and directs the secondary air in the upstream chamber a to the downstream chamber b via the first and second secondary air supply paths 34 and 35. and introduce it into the exhaust port 6.
前記接続ジヨイント３６と、前記第１、第２二
次空気供給路３４，３５の相対向する接続開口端
間にはそれぞれＯリング３８，３９が介在され、
それらの供給路３４，３５間を気密に接続する。 O-rings 38 and 39 are interposed between the connection joint 36 and the opposing connection opening ends of the first and second secondary air supply paths 34 and 35, respectively;
The supply paths 34 and 35 are connected airtightly.
尚、接続ジヨイント３６はシリンダヘツド２に
対するシリンダヘツドカバー１７の組立時の案内
部材にもなる。また前記下流側の第１、第２二次
空気供給路３４，３５の、接続ジヨイント３６近
傍部は、冷却フインを兼ねるリブ４０，４１によ
つて補強されている。 The connecting joint 36 also serves as a guide member when assembling the cylinder head cover 17 to the cylinder head 2. Further, the portions of the first and second secondary air supply passages 34 and 35 on the downstream side near the connection joint 36 are reinforced by ribs 40 and 41 which also serve as cooling fins.
第１図に示すように、車体フレームＦのダウン
チユーブｄ両側には、それぞれ方形枠状のガード
部材４２の前端が固着されている。このガード部
材４２は、車体フレームＦの後方に向つてのびて
おり、前記水平対向型内燃機関Ｅのシリンダ部１
のシリンダヘツドカバー１７の上部を囲繞してお
り、前記リード弁装置Ｌはそのガード部材４２内
に位置している。 As shown in FIG. 1, front ends of rectangular frame-shaped guard members 42 are fixed to both sides of the down tube d of the vehicle body frame F, respectively. This guard member 42 extends toward the rear of the vehicle body frame F, and extends toward the cylinder portion 1 of the horizontally opposed internal combustion engine E.
The reed valve device L is located within the guard member 42 of the cylinder head cover 17 .
次に上記のように構成される本考案の１実施例
の作用について説明する。 Next, the operation of one embodiment of the present invention constructed as described above will be explained.
いま内燃機関が運転されると、排気ポート６内
に排気脈動圧が発生し、この脈動圧は、下流側の
第２、第１二次空気供給路３５，３４を通つてリ
ード弁体２３に達しそれを開弁状態し、さらに空
気コントロール弁３３の開弁でエアクリーナ８内
の清浄空気の一部を二次空気導入チユーブ３２を
通して弁函１８内の上流室ａに導き、さらに各リ
ード弁体２３の弁口２６を通つて下流室ｂ内に流
入させ、そこより下流側第１二次空気供給路３
４、接続ジヨイント３６、および下流側第２二次
空気供給路３５を通して排気ポート６に導入す
る。排気ポート６内の導入二次空気は排気内に混
入し、排気ポート６および排気管９内において排
ガス中に混在するHC，CO等の未燃有害成分を酸
化させる。さらに二次空気の混入した排ガスはマ
フラー１０内に流入し、そこに内蔵される触媒コ
ンバータ１１の反応を促進し、その中の未燃有害
成分を最終的に浄化した後大気に放出される。 When the internal combustion engine is operated now, exhaust pulsating pressure is generated in the exhaust port 6, and this pulsating pressure is delivered to the reed valve body 23 through the second and first secondary air supply passages 35 and 34 on the downstream side. When the air control valve 33 is opened, a part of the clean air in the air cleaner 8 is guided through the secondary air introduction tube 32 to the upstream chamber a in the valve case 18, and then the air control valve 33 is opened. 23 into the downstream chamber b through the valve port 26, and the first secondary air supply path 3 downstream from there.
4, the air is introduced into the exhaust port 6 through the connection joint 36 and the downstream second secondary air supply path 35. The secondary air introduced into the exhaust port 6 mixes into the exhaust gas, and oxidizes unburned harmful components such as HC and CO mixed in the exhaust gas in the exhaust port 6 and the exhaust pipe 9. Furthermore, the exhaust gas mixed with secondary air flows into the muffler 10, promotes the reaction of the catalytic converter 11 built therein, and finally purifies the unburned harmful components therein before being released into the atmosphere.
而して前記シリンダ部１のシリンダヘツドカバ
ー１７の上部外周を囲繞するガード部材４２は、
リード弁装置Ｌを障害物等と干渉しないように保
護することができ、特に自動二輪車が第２図に示
すように大きなバンク角αを以てバンクしても、
ガード部材４２により走行面Ｒとリード弁装置Ｌ
との接触を避けることができる。 The guard member 42 surrounding the upper outer periphery of the cylinder head cover 17 of the cylinder portion 1 is
It is possible to protect the reed valve device L from interfering with obstacles, etc., and in particular, even if the motorcycle banks with a large bank angle α as shown in FIG.
The guard member 42 connects the running surface R and the reed valve device L.
contact can be avoided.
以上のように本考案によれば、排気浄化装置の
リード弁装置Ｌを水平対向型内燃機関のシリンダ
ヘツドカバー１７の外側部に設け、そのリード弁
装置Ｌの入口と大気とを連通する上流側二次空気
供給路３０およびリード弁装置Ｌの出口と、排気
ポート６とを連通する下流側二次空気供給路３
４，３５を何れもシリンダ部１の頭部のリード弁
装置Ｌよりも車体フレームＦ側に寄せて配設し、
かつシリンダヘツドカバー１７の外側部外周を、
車体フレームＦに支持されるガード部材４２によ
つて囲繞したので、リード弁装置Ｌおよびそれよ
りも内方に位置する上、下流側二次空気供給路３
０，３４，３５は何れも障害物から保護され、そ
れらが損傷をうけるようなことがない。 As described above, according to the present invention, the reed valve device L of the exhaust purification device is provided on the outer side of the cylinder head cover 17 of the horizontally opposed internal combustion engine, and the upstream side communicates the inlet of the reed valve device L with the atmosphere. A downstream secondary air supply path 3 that communicates the secondary air supply path 30 and the outlet of the reed valve device L with the exhaust port 6
4 and 35 are both arranged closer to the vehicle body frame F side than the reed valve device L at the head of the cylinder part 1,
and the outer periphery of the cylinder head cover 17,
Since it is surrounded by the guard member 42 supported by the vehicle body frame F, the reed valve device L and the upper and downstream side secondary air supply passages 3 located inwardly thereof are
0, 34, and 35 are all protected from obstacles and cannot be damaged.
またシリンダヘツドカバー１７は、ガード部材
４２を通して自由に取外すことができ、リード弁
装置Ｌ自体は勿論、タペツト調整等内燃機関Ｅ本
体のメンテナンス性の大幅な向上を図ることがで
きる。 Further, the cylinder head cover 17 can be freely removed through the guard member 42, and it is possible to greatly improve the maintainability of not only the reed valve device L itself but also the main body of the internal combustion engine E such as tappet adjustment.
図面は本考案の１実施例を示すもので、第１図
は本考案装置を装備した自動二輪車の側面図、第
２図はその正面図、第３図は第１図の一部の拡大
図、第４図は第３図の−線断面図である。
Ｅ……内燃機関、Ｆ……車体フレーム、１……
シリンダ部、６……排気ポート、１７……シリン
ダヘツドカバー、３４……下流側第１二次空気供
給路、３５……下流側第２二次空気供給路、４２
……ガード部材。
The drawings show one embodiment of the present invention; Fig. 1 is a side view of a motorcycle equipped with the device of the present invention, Fig. 2 is a front view thereof, and Fig. 3 is an enlarged view of a part of Fig. 1. , FIG. 4 is a sectional view taken along the line -- in FIG. 3. E...Internal combustion engine, F...Vehicle frame, 1...
Cylinder part, 6...Exhaust port, 17...Cylinder head cover, 34...Downstream first secondary air supply path, 35...Downstream second secondary air supply path, 42
...Guard member.
Claims (1)
該機関Ｅのシリンダ部１が前記車体フレームＦの
両側方を向くように搭載し、前記内燃機関Ｅの排
気系に、二次空気供給系を連通し、この二次空気
供給系の途中に、排気脈動圧応動式リード弁装置
Ｌを介装し、前記内燃機関Ｅの運転時に、排気系
内に発生する排気脈動によつて前記リード弁装置
Ｌを開閉し、前記排気系に二次空気を供給して排
気中に未燃有害成分を酸化除去するようにした、
自動二輪車用内燃機関の排気浄化装置において、
前記リード弁装置Ｌを前記内燃機関Ｅのシリンダ
ヘツドカバー１７の外側部に設け、そのリード弁
装置Ｌの入口と大気とを連通する上流側二次空気
供給路３０、およびリード弁装置Ｌの出口と前記
排気系の排気ポート６とを連通する下流側二次空
気供給路３４，３５を何れも前記リード弁装置Ｌ
よりも車体フレームＦ側に寄せて前記シリンダ部
１の頭部に配設し、さらに前記シリンダヘツドカ
バー１７の外側部外周を、車体フレームＦに支持
されるガード部材４２によつて囲繞してなる、自
動二輪車用内燃機関の排気浄化装置の保護装置。 A horizontally opposed internal combustion engine E is mounted on the vehicle body frame F.
The engine E is mounted so that the cylinder portion 1 faces both sides of the vehicle body frame F, and a secondary air supply system is connected to the exhaust system of the internal combustion engine E, and in the middle of the secondary air supply system, An exhaust pulsation pressure responsive reed valve device L is installed, and when the internal combustion engine E is operating, the reed valve device L is opened and closed by the exhaust pulsation generated in the exhaust system, and secondary air is supplied to the exhaust system. It was designed to oxidize and remove unburned harmful components from the exhaust gas.
In exhaust purification devices for internal combustion engines for motorcycles,
The reed valve device L is provided on the outer side of the cylinder head cover 17 of the internal combustion engine E, and an upstream secondary air supply passage 30 that communicates the inlet of the reed valve device L with the atmosphere, and an outlet of the reed valve device L are provided. Both the downstream side secondary air supply paths 34 and 35 communicating with the exhaust port 6 of the exhaust system are connected to the reed valve device L.
The cylinder head cover 17 is disposed at the head of the cylinder part 1 closer to the vehicle body frame F side, and the outer periphery of the cylinder head cover 17 is further surrounded by a guard member 42 supported by the vehicle body frame F. , a protection device for exhaust purification devices for internal combustion engines for motorcycles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19036880U JPS6221706Y2 (en) | 1980-12-27 | 1980-12-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19036880U JPS6221706Y2 (en) | 1980-12-27 | 1980-12-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57112016U JPS57112016U (en) | 1982-07-10 |
| JPS6221706Y2 true JPS6221706Y2 (en) | 1987-06-02 |
Family
ID=29994736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19036880U Expired JPS6221706Y2 (en) | 1980-12-27 | 1980-12-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6221706Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6106482B2 (en) * | 2013-03-22 | 2017-03-29 | 本田技研工業株式会社 | Saddle riding vehicle |
-
1980
- 1980-12-27 JP JP19036880U patent/JPS6221706Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57112016U (en) | 1982-07-10 |
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