JPS6249456B2 - - Google Patents

Info

Publication number
JPS6249456B2
JPS6249456B2 JP54122218A JP12221879A JPS6249456B2 JP S6249456 B2 JPS6249456 B2 JP S6249456B2 JP 54122218 A JP54122218 A JP 54122218A JP 12221879 A JP12221879 A JP 12221879A JP S6249456 B2 JPS6249456 B2 JP S6249456B2
Authority
JP
Japan
Prior art keywords
exhaust
engine
movable wall
holding
wall member
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
Application number
JP54122218A
Other languages
Japanese (ja)
Other versions
JPS5647609A (en
Inventor
Masahiro Takayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to JP12221879A priority Critical patent/JPS5647609A/en
Publication of JPS5647609A publication Critical patent/JPS5647609A/en
Publication of JPS6249456B2 publication Critical patent/JPS6249456B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/028—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation for two-stroke engines
    • F02D13/0284—Variable control of exhaust valves only
    • 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
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Description

【発明の詳細な説明】 本発明は二行程機関における排気時期制御装
置、詳しくはシリンダ内面に開口した排気通路の
排気口をピストンによつて開閉する型式の二行機
関であつて、ピストンが昇降して前記排気通路を
燃焼室内に開口し又は遮断する時期、いわゆる排
気ポートタイミングを可変とすべく排気口の上縁
を実質的に昇降させる可動壁部材を備えた装置の
改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust timing control device for a two-stroke engine, and more specifically, a two-stroke engine in which a piston opens and closes an exhaust port of an exhaust passage opened on the inner surface of a cylinder. The present invention relates to an improvement in a device equipped with a movable wall member that substantially raises and lowers the upper edge of an exhaust port in order to vary the timing at which the exhaust passage is opened or closed into a combustion chamber, that is, the so-called exhaust port timing.

一般に前記可動壁部材を備えた装置は機関の回
転速度の上昇とともに可動壁部材を上動、すなわ
ち排気口上縁を上げて排気タイミングを早める方
向に動作するよう設定してあり、そのため機関回
転速度の遅い始動時には前記可動壁部材が最も下
降した状態、すなわち排気タイミングの最も遅い
状態となつている。 Generally, devices equipped with the movable wall member are set to move the movable wall member upward as the engine rotational speed increases, that is, to raise the upper edge of the exhaust port and advance the exhaust timing. At the time of slow start, the movable wall member is in the lowest position, that is, the exhaust timing is the latest.

然るに機関の始動時には実質的な圧縮比が高い
ため始動時に大きな力を必要とし始動性低下の原
因となる。 However, since the effective compression ratio is high when starting the engine, a large force is required at the time of starting, which causes a decrease in starting performance.

とくにロードレース用の自動二輪車の如く、押
しかけにより機関を始動させるものにおいては、
特に始動性の向上が要求される。 Especially in motorcycles used for road racing, where the engine is started by force,
In particular, improvement in startability is required.

而して本発明は叙上従来事情に鑑み、機関の始
動時において可動壁部材を一時的に排気タイミン
グを早める位置に保持させることにより可変ポー
トタイミング式二行程機関の始動性を向上させる
ことを目的とし、斯る本発明装置は、機関の始動
時における所定低速回転域で可動壁部材を上動位
置に保持させる手段を設けたことを特徴とする。 In view of the above-mentioned conventional circumstances, the present invention aims to improve the startability of a variable port timing type two-stroke engine by temporarily holding a movable wall member in a position that advances the exhaust timing when the engine is started. Accordingly, the apparatus of the present invention is characterized in that it is provided with means for holding the movable wall member in the upward movement position in a predetermined low speed rotation range when the engine is started.

上記可動壁部材は機関の出力、速度等に応動し
て排気口上縁を昇降させるよう作動するが、その
クランク軸回転速度の検出及び可動壁部材の駆動
装置は電気的手段によるも、あるいはガバナ機
構、リンク機構等を用いた機械的手段によるも任
意であり、可動壁部材を上動位置に保持させる保
持手段も電気的又は機械的手段の何れでもよい。 The movable wall member operates to raise and lower the upper edge of the exhaust port in response to engine output, speed, etc., but the detection of the crankshaft rotational speed and the drive device for the movable wall member may be performed by electrical means or by a governor mechanism. Mechanical means using a link mechanism or the like may also be used as desired, and the holding means for holding the movable wall member in the upward movement position may be either electrical or mechanical means.

機械の所定低速回転域とは例えば整地走行用自
動二輪車の場合におけるアイドリング回転速度以
下をいい、レース用二輪車の場合にはアイドリン
グ運転がないので、０〜300r・ｐ・ｍの範囲に設
定する。 The predetermined low speed rotation range of the machine is, for example, the idling rotation speed or lower in the case of a two-wheeled motorcycle for grading, and in the case of a two-wheeled racing vehicle, since there is no idling operation, it is set in the range of 0 to 300 r.p.m.

可動壁部材の上動位置とは、必ずしも排気口上
縁を上限にした位置をいうものではなく、機関の
始動性を損わない程度の上方位置をいう。 The upward movement position of the movable wall member does not necessarily mean a position with the upper limit of the exhaust port as its upper limit, but refers to an upward position that does not impair the startability of the engine.

上記可動壁部材は機関の始動後に通常の作動状
態、すなわちクランク軸回転速度に応動して昇降
動する状態に復帰する必要があるが、前記保持手
段の解除手段は手動又は自動の何れでもよい。 After the engine is started, the movable wall member needs to return to its normal operating state, that is, a state in which it moves up and down in response to the rotational speed of the crankshaft, and the releasing means for the holding means may be either manual or automatic.

例えば、機械的保持手段の場合にはその解除レ
バーをハンドル部付近に設けて手動的に操作する
ようにし、電気的保持手段の場合にはクランク軸
回転速度が常用回転速度以上、例えば300r・ｐ・
ｍ以上になつたときに自動的に保持状態が解除さ
れるようにし、あるいは以下の実施例で示す如く
機械的に自動解除されるようにする如くである。 For example, in the case of mechanical holding means, the release lever is provided near the handle and operated manually, and in the case of electric holding means, the crankshaft rotational speed is higher than the normal rotational speed, e.g. 300 rpm.・
The holding state may be automatically released when the value exceeds m, or the holding state may be automatically released mechanically as shown in the following embodiment.

又、上記可動壁部材は排気口上縁を実質的に昇
降動させるものであれば、回転体型式、あるいは
ピストンを用いたスライド方式など従来知られた
何れの方式であつてもよい。 The movable wall member may be of any conventional type, such as a rotary type or a sliding type using a piston, as long as it can substantially move the upper edge of the exhaust port up and down.

本発明の実施例を自動二輪車の場合について図
面により説明すれば、第１図において機関はシリ
ンダ１とシリンダ内を摺動するピストン２及シリ
ンダヘツド３とによつて燃焼室４を形成し、５は
点火栓である。 An embodiment of the present invention will be explained with reference to the drawings in the case of a motorcycle. In FIG. is a spark plug.

シリンダ１の内面に開口した６は排気口、７は
掃気口であつて、その排気口６には排気通路８が
導出され、掃気口７は掃気通路９を介してクラン
ク室（図示せず）に連通される。 Reference numeral 6 which opens on the inner surface of the cylinder 1 is an exhaust port, and 7 is a scavenging port. An exhaust passage 8 is led out to the exhaust port 6, and the scavenging port 7 is connected to a crank chamber (not shown) via a scavenging passage 9. will be communicated to.

上記排気口６近傍上部には排気通路８の左右幅
方向に延び全体として略鼓形をなす収容室１０を
形成し、該室１０内に実質的に排気口６の上縁と
して機能する可動壁１１ｂを備えた回転体１１を
収容せしめる。 A housing chamber 10 extending in the left-right width direction of the exhaust passage 8 and having a generally drum shape is formed in the upper part near the exhaust port 6, and a movable wall that substantially functions as the upper edge of the exhaust port 6 is formed in the chamber 10. The rotating body 11 having the rotor 11b is housed therein.

回転体１１は全体として前記収容室１０の形状
に対応する略鼓形に形成されるともにその排気通
路８に面した鼓状周面の一部は前記通路８の上壁
一部をなすような切除面１１ａを形成し、前記可
動壁１１ｂが回転体１１の回動により排気口６の
上縁を昇降させるようにする。 The rotating body 11 as a whole is formed into a generally drum shape corresponding to the shape of the storage chamber 10, and a portion of the drum-shaped peripheral surface facing the exhaust passage 8 forms a part of the upper wall of the passage 8. A cut surface 11a is formed so that the movable wall 11b raises and lowers the upper edge of the exhaust port 6 by rotation of the rotating body 11.

上記回転体１１はその左右両端に夫々支軸１２
を有し該支軸を軸支されて収容室１０内に回動自
在に収容され、前記支軸１２の一端には、その半
径方向に突出するレバー１３を一体的に突設し、
該レバー１３に機関のクランク軸回転数に応じて
作動するアクチユエータ１４の作動リンク１５を
連結する（第２図）。 The rotating body 11 has support shafts 12 at its left and right ends, respectively.
It is rotatably housed in the storage chamber 10 with the support shaft being pivotally supported, and a lever 13 that projects in the radial direction is integrally provided at one end of the support shaft 12,
An actuating link 15 of an actuator 14, which operates according to the engine crankshaft rotation speed, is connected to the lever 13 (FIG. 2).

アクチユエータ１４は実施例ではガバナ機構を
図示し（第３図、第４図）、１６はハウジング、
１７はガバナ軸、１８は重錘、１９は摺動体、２
０はフオーク２１を介して前記摺動体１９に係着
するガバナ腕、２２は戻し用スプリングであつ
て、前記ガバナ２０はその一端をハウジング１６
外に突出させて該端に腕杆２０′が固着され、こ
の腕杆２０′に前記回転体１１のレバー１３と連
結された作動リンク１５の上端が連結されてい
る。 In the embodiment, the actuator 14 represents a governor mechanism (FIGS. 3 and 4), and 16 represents a housing;
17 is the governor shaft, 18 is the weight, 19 is the sliding body, 2
0 is a governor arm that is engaged with the sliding body 19 via a fork 21, 22 is a return spring, and the governor 20 has one end connected to the housing 16.
An arm rod 20' is fixed to this end so as to protrude outward, and the upper end of an operating link 15 connected to the lever 13 of the rotating body 11 is connected to this arm rod 20'.

上記アクチユエータ１４はそのガバナ軸１７
に、クランク軸と連繋して減速回転されるケーブ
ル２３が連結され、該ガバナ軸１７がクランク軸
回転数に応じた速度で回転し、その回転速度に比
例した変位が重錘１８、摺動体１９、フオーク２
１、ガバナ腕２０を介して腕杆２０′に回転角変
位となつて伝達され、それが作動リンク１５及び
レバー１３を介して回転体１１を所定角度宛回転
駆動させる。 The actuator 14 has its governor shaft 17
A cable 23 is connected to the crankshaft and rotated at a reduced speed in conjunction with the governor shaft 17, and the governor shaft 17 rotates at a speed corresponding to the rotational speed of the crankshaft, and the displacement proportional to the rotational speed is caused by the weight 18 and the sliding body 19. , fork 2
1. A rotational angular displacement is transmitted to the arm rod 20' via the governor arm 20, and this rotates the rotating body 11 to a predetermined angle via the operating link 15 and lever 13.

今、図示の構造においては、クランク軸が停止
の状態においてガバナ腕２０の腕杆２０′が上限
位置Ａにあり、クランク軸回転数の増大に伴い下
限位置Ｂに移動するように設定され（第２図）、
前記上限位置Ａにあつて回転体１１はその可動壁
１１ｂが最も下降した下限位置ａすなわち排気タ
イミングが最も遅い状態となり、下限位置Ｂにあ
つて回転体１１は可動壁１１ｂが最も上昇した上
限位置ｂ（排気タイミングが最も早い）になるよ
うに設定されている（第１図）。 In the illustrated structure, the arm rod 20' of the governor arm 20 is at the upper limit position A when the crankshaft is at rest, and is set to move to the lower limit position B as the crankshaft rotational speed increases. Figure 2),
At the upper limit position A, the rotating body 11 is at the lower limit position a where the movable wall 11b is the lowest, that is, the exhaust timing is the slowest, and at the lower limit position B, the rotating body 11 is at the upper limit position where the movable wall 11b is the highest. b (the earliest exhaust timing) (Fig. 1).

斯るアクチユエータ１４はその腕杆２０′の先
端を若干ハウジング１６側に向け屈曲させて形成
し、該先端部２０″にバネ板２４を延長上突出す
るように取付けると共にハウジング１６側面には
前記腕杆２０′をその下限位置Ｂより若干上方の
位置Ｃで掛止保持させるストツパ２５を設ける。 The actuator 14 is formed by slightly bending the tip of an arm rod 20' toward the housing 16, and a spring plate 24 is attached to the tip 20'' so as to extend and protrude, and the arm is attached to the side of the housing 16. A stopper 25 is provided for holding the rod 20' at a position C slightly above its lower limit position B.

ストツパ２５はハウジング１６側の面よりバネ
板２４の先端部に向けて突出するピン２６の先端
にフランジ２６′を設けたもので、そのフランジ
２６′はバネ板２４の先端部に達しない位置、す
なわちバネ板２４の平板状先端位置よりハウジン
グ１６側に引込んだところに位置させる。 The stopper 25 is provided with a flange 26' at the tip of a pin 26 that protrudes from the surface of the housing 16 toward the tip of the spring plate 24, and the flange 26' is located at a position that does not reach the tip of the spring plate 24. That is, the spring plate 24 is located at a position recessed toward the housing 16 from the flat tip end position of the spring plate 24.

上記アクチユエータ１４の腕杆２０′は該杆２
０′を前記位置Ｃに合わせたところでバネ板２４
先端部をストツパ２５のフランジ２６′内側に押
し曲げることにより、腕杆２０′がスプリング２
２の弾力で上動する方向に付勢されるためバネ板
２４がピン２６に当接するとともにバネ板２４の
復元力でもつて該バネ板２４がフランジ２６′に
掛止し、その結果腕杆２０′は前示位置Ｃに掛止
状保持される。 The arm rod 20' of the actuator 14 is the rod 2
0' is aligned with the position C, the spring plate 24
By pressing and bending the tip end inward of the flange 26' of the stopper 25, the arm rod 20' is attached to the spring 2.
2, the spring plate 24 comes into contact with the pin 26, and the restoring force of the spring plate 24 causes the spring plate 24 to latch onto the flange 26', and as a result, the arm rod 20 ' is held at the position C in a latch manner.

上記位置Ｃに腕杆２０′が保持された状態にお
いて、回転体１１はその可動壁１１ｂが上限位置
ｂより若干下がつた位置ｃ、すなわち排気タイミ
ングが早い方の状態に保持される（第２図、第１
図）。 In a state where the arm rod 20' is held at the above position C, the rotating body 11 is held at a position c where the movable wall 11b is slightly lower than the upper limit position b, that is, a state where the exhaust timing is earlier (second Figure, 1st
figure).

従つて、上記バネ板２４及びストツパ２５によ
り回転体１１の保持手段を構成する。 Therefore, the spring plate 24 and the stopper 25 constitute a holding means for the rotating body 11.

そして上記バネ板２４は腕杆２０′が下降する
とき、すなわち機関が始動しクランク軸回転速度
が所定値以上になればアクチユエータ１４の作動
により腕杆２０′が下限位置Ｂ方向に下降し、そ
れに伴いバネ板２４も下降してストツパ２５から
離脱するので、バネ板２４はその復元力により自
動的に復帰し、腕杆２０′の掛止保持状態は解除
される。 When the arm rod 20' is lowered, that is, when the engine is started and the crankshaft rotational speed exceeds a predetermined value, the actuator 14 is actuated to lower the arm rod 20' toward the lower limit position B. At the same time, the spring plate 24 also descends and separates from the stopper 25, so that the spring plate 24 automatically returns to its original position due to its restoring force, and the holding state of the arm rod 20' is released.

従つて上記バネ板２４及びストツパ２５により
自動解除手段をも構成している。 Therefore, the spring plate 24 and the stopper 25 also constitute automatic release means.

上記位置ｃは回転体１１の可動壁１１ｂの始動
位置として設定される。 The above position c is set as the starting position of the movable wall 11b of the rotating body 11.

而して自動二輪車の始動時に、先づバネ板２４
をストツパ２５に掛止めさせて回転体１１の可動
壁１１ｂを排気タイミングが早まる始動位置ｃに
保持させ、次いで二輪車を押し動かし、あるいは
キツクするなどの始動操作を起して機関を始動さ
せて運転する。そして始動後、機関速度が高くな
るとアクチユエータ１４の作動により腕杆２０′
が下限位置Ｂ側に移動するので、バネ板２４がス
トツパ２５から自動的に外ずれ、その後はアクチ
ユエータ１４の作動によつて機関回転速度が低い
ときには腕杆２０′が上限位置Ａ方向に移動し、
機関回転速度の増大に応じて腕杆２０′が下限位
置Ｂ方向に移動して回転体１１の可動壁１１ｂを
昇降させ排気タイミングを変化させる。 Therefore, when starting the motorcycle, the spring plate 24
is latched to the stopper 25 to hold the movable wall 11b of the rotating body 11 at the starting position c where the exhaust timing is advanced, and then a starting operation such as pushing or turning the two-wheeled vehicle is performed to start the engine and drive the engine. do. After starting, when the engine speed increases, the actuator 14 operates to move the arm rod 20'.
moves toward the lower limit position B, the spring plate 24 is automatically disengaged from the stopper 25, and thereafter, when the engine speed is low due to the operation of the actuator 14, the arm rod 20' moves toward the upper limit position A. ,
As the engine rotational speed increases, the arm rod 20' moves toward the lower limit position B, raises and lowers the movable wall 11b of the rotating body 11, and changes the exhaust timing.

本発明は叙上の如く排気口の上縁として機能
し、機関速度に応動して排気タイミングを可変と
する可動壁部材を設けた二行程機関において、前
記可動壁部材を上動位置に保持させる手段を設け
たので、機関の排気タイミングは通常運転時にお
ける排気タイミングより早められた状態に保持さ
れて始動させることができ、従つて始動性の向上
された二行程機関を提供できる。 As described above, the present invention is a two-stroke engine that is provided with a movable wall member that functions as the upper edge of the exhaust port and whose exhaust timing is variable in response to engine speed, in which the movable wall member is held in an upwardly moving position. Since the means is provided, the exhaust timing of the engine can be maintained earlier than the exhaust timing during normal operation, and the engine can be started, thereby providing a two-stroke engine with improved startability.

以つて所期の目的を達成し得る。 Only then can the intended purpose be achieved.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明二行程機関の縦断面図、第２図
は排気時期制御装置を示す側面図、第３図は一部
切欠せる要部拡大図、第４図はその平面図であ
る。 図中、１はシリンダ、６は排気口、８は排気通
路、１１は回転体、１１ｂは可動壁、１４はアク
チユエータ、２０はガバナ腕、２０′は腕杆、２
４はバネ板、２５はストツパ、２６はピン、２
６′はフランジ、ｃは可動壁の始動位置である。 FIG. 1 is a longitudinal cross-sectional view of a two-stroke engine according to the present invention, FIG. 2 is a side view showing an exhaust timing control device, FIG. 3 is an enlarged view of the main part partially cut away, and FIG. 4 is a plan view thereof. In the figure, 1 is a cylinder, 6 is an exhaust port, 8 is an exhaust passage, 11 is a rotating body, 11b is a movable wall, 14 is an actuator, 20 is a governor arm, 20' is an arm rod, 2
4 is a spring plate, 25 is a stopper, 26 is a pin, 2
6' is the flange, and c is the starting position of the movable wall.

Claims (1)

【特許請求の範囲】 １ シリンダ内面の排気口から導出される排気通
路の排気口近傍上面に前記排気口の上縁として機
能し機関速度に応動して排気タイミングを可変と
する可動壁部材を設けた二行程機関において、機
関の始動時における所定低速回転域で前記可動壁
部材を上動位置に保持させる手段を設けた排気時
期制御装置。 ２ 上記保持手段が機械的手段によることを特徴
とする特許請求の範囲第１項記載の排気時期制御
装置。 ３ 上記保持手段が電気的手段によることを特徴
とする特許請求の範囲第１項記載の排気時期制御
装置。 ４ 上記保持手段の保持状態を機関回転数の上昇
に伴い自動的に解除する手段を設けたことを特徴
とする特許請求の範囲第２項又は第３項記載の排
気時期制御装置。[Scope of Claims] 1. A movable wall member is provided on the upper surface near the exhaust port of the exhaust passage led out from the exhaust port on the inner surface of the cylinder, which functions as the upper edge of the exhaust port and changes the exhaust timing in response to the engine speed. An exhaust timing control device for a two-stroke engine, comprising means for holding the movable wall member in an upward movement position in a predetermined low speed rotation range when starting the engine. 2. The exhaust timing control device according to claim 1, wherein the holding means is a mechanical means. 3. The exhaust timing control device according to claim 1, wherein the holding means is an electric means. 4. The exhaust timing control device according to claim 2 or 3, further comprising means for automatically releasing the holding state of the holding means as the engine speed increases.
JP12221879A 1979-09-21 1979-09-21 Exhaust timing controller for two-cycle engine Granted JPS5647609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12221879A JPS5647609A (en) 1979-09-21 1979-09-21 Exhaust timing controller for two-cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12221879A JPS5647609A (en) 1979-09-21 1979-09-21 Exhaust timing controller for two-cycle engine

Publications (2)

Publication Number Publication Date
JPS5647609A JPS5647609A (en) 1981-04-30
JPS6249456B2 true JPS6249456B2 (en) 1987-10-20

Family

ID=14830466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12221879A Granted JPS5647609A (en) 1979-09-21 1979-09-21 Exhaust timing controller for two-cycle engine

Country Status (1)

Country Link
JP (1) JPS5647609A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3666716D1 (en) * 1985-07-22 1989-12-07 Honda Motor Co Ltd Exhaust timing control apparatus
DE3668348D1 (en) * 1985-07-22 1990-02-22 Honda Motor Co Ltd DEVICE FOR CONTROLLING THE EXHAUST TIME OF AN INTERNAL COMBUSTION ENGINE.
JPH0635832B2 (en) * 1985-09-11 1994-05-11 本田技研工業株式会社 Exhaust timing control device for 2-cycle engine
JPS62174514A (en) * 1986-01-29 1987-07-31 Honda Motor Co Ltd Exhaust timing control device for two-cycle engine
JPS62267515A (en) * 1986-05-14 1987-11-20 Honda Motor Co Ltd Exhaust timing control device for two-cycle engine
US4776305A (en) * 1986-05-20 1988-10-11 Honda Giken Kogyo Kabushiki Kaisha Exhaust timing control device for two-cycle engines

Also Published As

Publication number Publication date
JPS5647609A (en) 1981-04-30

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