JP4751366B2 - Twin barrel type double throttle body in an internal combustion engine for motorcycles - Google Patents

Twin barrel type double throttle body in an internal combustion engine for motorcycles Download PDF

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JP4751366B2
JP4751366B2 JP2007131538A JP2007131538A JP4751366B2 JP 4751366 B2 JP4751366 B2 JP 4751366B2 JP 2007131538 A JP2007131538 A JP 2007131538A JP 2007131538 A JP2007131538 A JP 2007131538A JP 4751366 B2 JP4751366 B2 JP 4751366B2
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intake passage
engine
throttle body
barrel type
throttle valve
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JP2008286098A (en
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靖史 近藤
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Keihin Corp
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Description

本発明は、燃料タンク内の燃料が燃料ポンプによって昇圧され、この昇圧された燃料がスロットルボデーに取着された燃料噴射弁を介して内燃機関（以下単に機関という）へ噴射供給される燃料噴射装置に関し、そのうち特に、スロットルボデーは、スロットルボデー内に第１吸気通路とその他側方に第２吸気通路とが平行に隣設して穿設配置される単一のツインバレル型スロットルボデーとして形成され、第１吸気通路の機関側端面に向けて第１吸気通路及び第１吸気通路に連設される第１噴霧逃げ孔を囲繞する第１機関側取付口金が形成されるとともに第２吸気通路の機関側の端面に向けて第２吸気通路及び第２吸気通路に連設される第２噴霧逃げ孔を囲繞する第2機関側取付口金が形成され、又前記単一のツインバレル型スロットルボデーが側方に２個平行に隣設して配置され、一側のツインバレル型スロットルボデーの第２吸気通路と他側のツインバレル型スロットルボデーの第１吸気通路とが側方に対向して隣設配置され、更に各第１機関側取付口金、第２機関側取付口金がゴムマウントを介して機関に接続配置される自動二輪車用の内燃機関におけるツインバレル型２連スロットルボデーに関する。   In the present invention, fuel in a fuel tank is boosted by a fuel pump, and the boosted fuel is injected and supplied to an internal combustion engine (hereinafter simply referred to as an engine) through a fuel injection valve attached to a throttle body. Regarding the device, in particular, the throttle body is formed as a single twin-barrel type throttle body in which a first intake passage and a second intake passage on the other side are adjacently arranged in parallel in the throttle body. The first intake passage and the first intake passage that surrounds the first intake passage and the first spray escape hole connected to the first intake passage are formed toward the engine-side end surface of the first intake passage, and the second intake passage is formed. A second engine side mounting base surrounding the second intake passage and the second spray escape hole connected to the second intake passage is formed toward the end surface on the engine side, and the single twin barrel type throttle body is formed. -Are arranged next to each other in parallel, and the second intake passage of the twin barrel type throttle body on one side and the first intake passage of the twin barrel type throttle body on the other side face each other. Further, the present invention relates to a twin barrel type double throttle body in an internal combustion engine for a motorcycle in which each first engine side mounting base and second engine side mounting base are connected to the engine via a rubber mount.

かかる従来の内燃機関用のスロットルボデーは、特許文献１に開示される。かかる特許文献１に開示される技術に基づくツインバレル型スロットルボデーについて図２、図３により説明する。図２は機関側よりみた正面図。図３は図２のＰ−Ｐ線における要部縦断面図。である。単一のツインバレル型スロットルボデーＳは以下によって形成される。単一のツインバレル型スロットルボデーＳ内には、第１吸気通路２０とその他側方（図２において右側）に第２吸気通路２１とが側方に平行に隣設して穿設配置される。２２は第１吸気通路２０、第２吸気通路２１の長手軸心線Ｗ−Ｗに直交し、第１、第２吸気通路２０、２１を横断してツインバレル型スロットルボデーＳに回転自在に支持される一本軸よりなる絞り弁軸であり、この絞り弁軸２２には、第１吸気通路２０を開閉する第１絞り弁２３と、第２吸気通路２１を開閉する第２絞り弁２４とがネジによって取着される。Ｊ１は第１吸気通路２０の下方Ｈに配置される第１燃料噴射弁であり、燃料分配管３０とツインバレル型スロットルボデーＳとにより挟持され、第１燃料噴射弁Ｊ１の先端に開口する噴孔は、第１絞り弁２３より機関側の第１吸気通路２０ａに、第１噴霧逃げ孔２６Ａを介して開口配置される。（第１噴霧逃げ孔２６Ａは、第１絞り弁２３より機関側の第１吸気通路２０ａの下方底部に連設して形成される）以上によれば、第１吸気通路２０ａの機関側端面２０ｂには第１絞り弁２３より機関側の第１吸気通路２０ａと、第１絞り弁２３より機関側の第１吸気通路２０ａに連設される第１噴霧逃げ孔２６Ａが開口配置される。そして第１吸気通路２０の機関側端面２０ｂには、第１絞り弁２３より機関側の第１吸気通路２０ａ及び前記第１吸気通路２０ａに向かって連設される第１噴霧逃げ孔２６Ａを囲繞する第１機関側取付口金２５が形成される。この第１機関側取付口金２５は、図２に示されるように絞り弁軸２２の長手軸心線Ｘ−Ｘに直交し、第１吸気通路２０の中心Ｂを通る線Ｙ−Ｙ上であって、且つ絞り弁軸２２の長手軸心線Ｘ−Ｘより下側Ｈに向けてａ偏芯した位置を基準として円形状に形成される。尚、かかる第１機関側取付口金２５は第１吸気通路２０の機関側端面２０ｂより絞り弁軸２２側に向けて取付け長さＬを有する。Ｊ２は第２吸気通路２１の下方Ｈに配置される第２燃料噴射弁であり、燃料分配管３０とツインバレル型スロットルボデーＳとにより挟持され、第２燃料噴射弁Ｊ２の先端に開口する噴孔は、第２絞り弁２４より機関側の第２吸気通路２１ａに、第２噴霧逃げ孔２６Ｂを介して開口配置される。（第２噴霧逃げ孔２６Ｂは、第２絞り弁２４より機関側の第２吸気通路２１ａの下方底部に連設して形成される）以上によれば、第２吸気通路２１の機関側端面２１ｂには第２絞り弁２４より機関側の第２吸気通路２１ａと、第２絞り弁２４より機関側の第２吸気通路２１ａに連設される第２噴霧逃げ孔２６Ｂが開口配置される。そして第２吸気通路２１の機関側端面２１ｂには、第２絞り弁２４より機関側の第２吸気通路２１ａ及び前記第２吸気通路２１に向かって連設される第２噴霧逃げ孔２６Ｂを囲繞する第２機関側取付口金２７が形成される。この第２機関側取付口金２７は、図２に示されるように絞り弁軸２２の長手軸心線Ｘ−Ｘに直交し、第２吸気通路２１の中心Ｄを通る線Ｚ−Ｚ上であって、且つ絞り弁軸２２の長手軸心線Ｘ−Ｘより下側Ｈに向けてａ偏芯した位置を基準として円形状に形成される。尚、かかる第２機関側取付口金２７は第２吸気通路２１の機関側端面２１ｂより絞り弁軸２２側に向けて取付け長さＬを有する。
特開２００６−３４２６７５ Such a conventional throttle body for an internal combustion engine is disclosed in Patent Document 1. A twin barrel type throttle body based on the technique disclosed in Patent Document 1 will be described with reference to FIGS. FIG. 2 is a front view as seen from the engine side. FIG. 3 is a longitudinal sectional view of an essential part taken along line P-P in FIG. It is. A single twin barrel type throttle body S is formed by: In the single twin-barrel type throttle body S, the first intake passage 20 and the second intake passage 21 on the other side (the right side in FIG. 2) are provided so as to be adjacent in parallel to the side. . 22 is orthogonal to the longitudinal axis WW of the first intake passage 20 and the second intake passage 21, and is rotatably supported on the twin barrel type throttle body S across the first and second intake passages 20 and 21. The throttle valve shaft 22 includes a first throttle valve 23 that opens and closes the first intake passage 20, and a second throttle valve 24 that opens and closes the second intake passage 21. Is attached by screws. J1 is a first fuel injection valve disposed below H of the first intake passage 20, and is an injection that is sandwiched between the fuel distribution pipe 30 and the twin barrel type throttle body S and that opens at the tip of the first fuel injection valve J1. The hole is disposed in the first intake passage 20a closer to the engine than the first throttle valve 23 through the first spray escape hole 26A. (The first spray escape hole 26A is formed continuously with the lower bottom of the first intake passage 20a on the engine side from the first throttle valve 23) According to the above, the engine-side end face 20b of the first intake passage 20a. The first throttle passage 23 is provided with a first intake passage 20a on the engine side from the first throttle valve 23, and a first spray escape hole 26A connected to the first intake passage 20a on the engine side from the first throttle valve 23. The engine-side end face 20b of the first intake passage 20 surrounds a first intake passage 20a on the engine side from the first throttle valve 23 and a first spray escape hole 26A continuously provided toward the first intake passage 20a. A first engine side mounting base 25 is formed. As shown in FIG. 2, the first engine side mounting base 25 is on a line YY perpendicular to the longitudinal axis XX of the throttle valve shaft 22 and passing through the center B of the first intake passage 20. In addition, the throttle valve shaft 22 is formed in a circular shape with reference to a position decentered from the longitudinal axis XX of the throttle valve shaft 22 toward the lower side H. The first engine side mounting base 25 has a mounting length L from the engine side end face 20b of the first intake passage 20 toward the throttle valve shaft 22 side. J2 is a second fuel injection valve disposed below H of the second intake passage 21, and is an injection that is sandwiched between the fuel distribution pipe 30 and the twin barrel type throttle body S and opens at the tip of the second fuel injection valve J2. The hole is disposed in the second intake passage 21a closer to the engine than the second throttle valve 24 via the second spray escape hole 26B. (The second spray escape hole 26B is formed continuously to the lower bottom of the second intake passage 21a on the engine side from the second throttle valve 24) According to the above, the engine side end surface 21b of the second intake passage 21 is described. The second intake passage 21 a on the engine side from the second throttle valve 24 and the second spray escape hole 26 </ b> B connected to the second intake passage 21 a on the engine side from the second throttle valve 24 are opened. The engine-side end surface 21b of the second intake passage 21 surrounds the second intake passage 21a on the engine side from the second throttle valve 24 and the second spray escape hole 26B provided continuously from the second intake passage 21 toward the second intake passage 21. A second engine side mounting base 27 is formed. As shown in FIG. 2, the second engine side mounting base 27 is on a line ZZ perpendicular to the longitudinal axis XX of the throttle valve shaft 22 and passing through the center D of the second intake passage 21. In addition, the throttle valve shaft 22 is formed in a circular shape with reference to a position decentered from the longitudinal axis XX of the throttle valve shaft 22 toward the lower side H. The second engine side mounting base 27 has a mounting length L from the engine side end face 21b of the second intake passage 21 toward the throttle valve shaft 22 side.
JP 2006-342675 A

そして、上記単一のツインバレル型スロットルボデーＳが側方に２個隣設配置される。（両ツインバレル型スロットルボデーの連結手段は省略された）尚、説明を容易にする為に図２において左方のツインバレル型スロットルボデーを一側のツインバレル型スロットルボデーＳ１と呼び、右方のツインバレル型スロットルボデーを他側のツインバレル型スロットルボデーＳ２と呼ぶ。上記した配置によると、一側のツインバレル型スロットルボデーＳ１の第２吸気通路２１と他側のツインバレル型スロットルボデーＳ２の第１吸気通路２０とが隣設して対向配置される。いいかえれば、一側のツインバレル型スロットルボデーＳ１の第２機関側取付口金２７と他側のツインバレル型スロットルボデーＳ２の第１機関側取付口金２５が対向して隣設配置される。又、両ツインバレル型スロットルボデーＳ１、Ｓ２に配置されるそれぞれの絞り弁軸２２、２２はその長手軸心線Ｘ−Ｘ、Ｘ−Ｘが同芯にて同一直線上に配置される。そして、一側のツインバレル型スロットルボデーＳ１に配置された絞り弁軸２２の他端２２ａと他側のツインバレル型スロットルボデーＳ２に配置された絞り弁軸２２の一端２２ｂとは、従動レバー２８、主動レバー２９等よりなる連結同調機構３０により連動連結される。尚、３１は他側のツインバレル型スロットルボデーＳ２に支持される絞り弁軸２２の他端２２ａに取着されるスロットルドラムであり、図示せぬアクセルワイヤにより、運転者が操作するアクセルドラムに接続される。又３１ａはアクセルドラム３０から延びる全開調整レバー片であり、３１ｂはアクセルドラム３０から延びるアイドル調整片であり、全開調整レバー片３１ａには、全開調整スクリュー３２が当接配置され、アイドル調整片３１ｂには、アイドル調整スクリュー３３が当接配置される。更に、３４は一側のスロットルボデーＳ１に支持される絞り弁軸２２の一端２２ｂに係合配置されるスロットル開度センサであり、絞り弁軸２２の回転角度を捻出し、図示せぬＥＣＵに向けて電気的開度出号を出力する。そして、一側のツインバレル型スロットルボデーＳ１、他側のツインバレル型スロットルボデーＳ２の各第１機関側取付口金２５及び第２機関側取付口金２７に図示されぬ円形状をなすゴムマウントの一側が接続され、その他側が機関に接続されるもので、各吸気通路を流れる制御された混合気は各ゴムマウントを介して機関に供給される。   Two single twin barrel type throttle bodies S are arranged side by side. (The connection means of the twin barrel type throttle bodies has been omitted.) For ease of explanation, the left twin barrel type throttle body is called the one side twin barrel type throttle body S1 in FIG. This twin barrel type throttle body is referred to as the other side twin barrel type throttle body S2. According to the above arrangement, the second intake passage 21 of the twin barrel type throttle body S1 on one side and the first intake passage 20 of the twin barrel type throttle body S2 on the other side are arranged adjacent to each other. In other words, the second engine side mounting base 27 of the twin barrel type throttle body S1 on one side and the first engine side mounting base 25 of the twin barrel type throttle body S2 on the other side are arranged adjacent to each other. Further, the throttle valve shafts 22 and 22 arranged in the twin barrel type throttle bodies S1 and S2 are arranged on the same straight line with their longitudinal axis XX and XX being concentric. The other end 22a of the throttle valve shaft 22 disposed on the one side twin barrel type throttle body S1 and the one end 22b of the throttle valve shaft 22 disposed on the other side twin barrel type throttle body S2 are connected to the driven lever 28. The interlocking mechanism 30 is composed of the main driving lever 29 and the like. A throttle drum 31 is attached to the other end 22a of the throttle valve shaft 22 supported by the twin barrel type throttle body S2 on the other side. The throttle drum 31 is an accelerator drum operated by the driver by an accelerator wire (not shown). Connected. 31a is a fully open adjusting lever piece extending from the accelerator drum 30, 31b is an idle adjusting piece extending from the accelerator drum 30, and a fully opening adjusting screw 32 is disposed in contact with the fully open adjusting lever piece 31a. The idle adjustment screw 33 is disposed so as to abut. Further, 34 is a throttle opening sensor that is engaged with one end 22b of the throttle valve shaft 22 supported by the throttle body S1 on one side, and twists the rotation angle of the throttle valve shaft 22 to the ECU (not shown). Outputs an electrical opening signal. A rubber mount having a circular shape (not shown) is formed in each of the first engine side mounting base 25 and the second engine side mounting base 27 of the twin barrel type throttle body S1 on one side and the twin barrel type throttle body S2 on the other side. One side is connected and the other side is connected to the engine, and the controlled air-fuel mixture flowing through each intake passage is supplied to the engine via each rubber mount.

かかる従来のツインバレル型２連スロットルボデーによると、特に一側のツインバレル型スロットルボデーＳ１の、第２絞り弁２４より機関側の吸気通路２１ａ及び第２噴霧逃げ孔２６Ｂを囲繞する第２機関側取付口金２７の他側端２７ａ（他側のツインバレル型スロットルボデーＳ２に臨む側の外側端）と、他側のツインバレル型スロットルボデーＳ２の、第１絞り弁２３より機関側の吸気通路２０ａ及び第１噴霧逃げ孔２6Ａを囲繞する第１機関側取付口金２５の一側端２５ａ（一側のツインバレル型スロットルボデーＳ１に臨む側の外側端）との間隙Ｔを効果的に小さくすることができない。これは、第１機関側取付口金２５、第２機関側取付口金２７が円形状をなすゴムマウントに挿入接続することから断面が円形状に形成されること。及び第１、第２機関側取付口金２５、２７の円形中心が第１、第２吸気通路２０、２１の前記中心線Ｙ−Ｙ及びＺ−Ｚ上に配置されたことによる。上記の如く、前記間隙Ｔを効果的に小さくできないことによると、かかる間隙Ｔ内に配置される連結同調機構３０の設計的自由度が阻害されることになり小型化されたツインバレル型２連スロットルボデーを提供することが困難である。尚、かかる間隙Ｔを大きくする為に一側のツインバレル型スロットルボデーＳ１の第２吸気通路２１の中心線Ｚ−Ｚと、他側のツインバレル型スロットルボデーＳ２の第１吸気通路２０の中心線Ｙ−ＹとのピッチＶ１を大きくすることも考えられるが、これによるとスロットルボデーの横幅が大きく成るとともに第１、第２吸気通路のピッチＶ２を含む全ての連装ピッチが変化し、互換性を備えることができない。又第１、第２吸気通路２０、２１のピッチＶ２を小さくすることも考慮されるがこれを従来との互換性がそこなわれる。   According to such a conventional twin barrel type double throttle body, in particular, the second engine surrounding the intake passage 21a and the second spray escape hole 26B on the engine side from the second throttle valve 24 of the twin barrel type throttle body S1 on one side. An intake passage on the engine side from the first throttle valve 23 of the other end 27a of the side mounting base 27 (the outer end facing the other twin barrel type throttle body S2) and the other side twin barrel type throttle body S2 Effectively reduce the gap T between one end 25a of the first engine side mounting base 25 (the outer end facing the twin barrel type throttle body S1 on one side) surrounding the 20a and the first spray escape hole 26A. I can't. This is because the first engine side mounting base 25 and the second engine side mounting base 27 are inserted and connected to a circular rubber mount so that the cross section is formed in a circular shape. This is because the circular centers of the first and second engine side mounting caps 25 and 27 are arranged on the center lines YY and ZZ of the first and second intake passages 20 and 21, respectively. As described above, if the gap T cannot be effectively reduced, the design freedom of the coupling tuning mechanism 30 disposed in the gap T is hindered, and the twin-barrel twin type that is downsized is reduced. It is difficult to provide a throttle body. In order to increase the gap T, the center line ZZ of the second intake passage 21 of the twin barrel type throttle body S1 on one side and the center of the first intake passage 20 of the twin barrel type throttle body S2 on the other side. Although it is conceivable to increase the pitch V1 with the line Y-Y, according to this, the width of the throttle body is increased and all the connecting pitches including the pitch V2 of the first and second intake passages are changed. Cannot be provided. In addition, it is considered to reduce the pitch V2 of the first and second intake passages 20 and 21, but this is not compatible with the conventional one.

本発明になるツインバレル型２連スロットルボデーは前記不具合に鑑み成されたもので、従来の吸気通路間のピッチ（単一のツインバレル型スロットルボデー内における第１吸気通路と第２吸気通路とのピッチＶ２及び一側のツインバレル型スロットルボデーの第２吸気通路と他側のツインバレル型スロットルボデーの第１吸気通路とのピッチＶ１）を何等変更することなく、一側のツインバレル型スロットルボデーの第２機関側取付口金の他側端と、他側のツインバレル型スロットルボデーの第１機関側取付口金の一側端との間に形成される間隙を効果的に増加し、もってこの間隙内に配置される連結同調機構等の配置の設計的自由度を向上し、小型化された自動二輪車用の内燃機関におけるツインバレル型２連スロットルボデーを提供することを第１の目的とする。   The twin-barrel type double throttle body according to the present invention is made in view of the above-mentioned problems. The pitch between the conventional intake passages (the first intake passage and the second intake passage in a single twin-barrel type throttle body) The pitch V2 of the second side and the pitch V1 between the second intake passage of the twin barrel type throttle body on the one side and the first intake passage of the twin barrel type throttle body on the other side are not changed, and the twin barrel type throttle on the one side is not changed. The gap formed between the other side end of the second engine side mounting base of the body and one side end of the first engine side mounting base of the twin barrel type throttle body on the other side is effectively increased. Provided is a twin-barrel type dual throttle body in an internal combustion engine for a motorcycle that is improved in design freedom of arrangement of a coupling tuning mechanism and the like arranged in the gap. A first object that.

本発明になる自動二輪車用の内燃機関におけるツインバレル型２連スロットルボデーは、前記目的達成の為に、単一のツインバレル型スロットルボデーは、該スロットルボデー内に平行に隣設して穿設される第１吸気通路、第２吸気通路と、第１、第２吸気通路の長手軸心線に直交し、第１、第２吸気通路を側方に横断して配置されるとともに各吸気通路を開閉する第１絞り弁、第２絞り弁が取着された一本軸よりなる絞り弁軸と、第１吸気通路の下側であって、且つ絞り弁より機関側の第１吸気通路に向けて連設される第１噴霧逃げ孔を介して開口配置される第１燃料噴射弁と、第２吸気通路の下側であって、且つ絞り弁より機関側の第２吸気通路に向けて連設される第２噴霧逃げ孔を介して開口配置される第２燃料噴射弁と、絞り弁より機関側の第１吸気通路及び絞り弁より機関側の第１吸気通路に連設される第１噴霧逃げ孔を囲繞し、第１吸気通路の機関側端面の外周に向けて形成される円形状をなす第１機関側取付口金と、絞り弁より機関側の第２吸気通路及び絞り弁より機関側の第２吸気通路に連設される第２噴霧逃げ孔を囲繞し、第２吸気通路の機関側端面の外周に向けて形成される円形状をなす第２機関側取付口金とを、備え、前記単一のツインバレル型スロットルボデーが側方に２個隣設配置されることにより、一側のツインバレル型スロットルボデーの第２吸気通路と他側のツインバレル型スロットルボデーの第１吸気通路とが対向配置され、且つ両絞り弁軸の長手軸心線が同一直線上に配置されるとともに各ツインバレル型スロットルボデーの第１機関側取付口金、第２機関側取付口金がゴムマウントを介して機関に接続される自動二輪車用の内燃機関におけるツインバレル型２連スロットルボデーにおいて、前記単一のスロットルボデーの第１吸気通路の機関側端面に向けて形成される前記第１機関側取付口金の第１円形中心Aを、絞り弁軸の長手軸心線Ｘ−Ｘより下側にａ偏芯させるとともに前記長手軸心線Ｘ−Ｘに直交し、且つ第１吸気通路の中心Ｂを通る線Ｙ−Ｙより第２吸気通路側にｂ偏芯して配置し、一方、第２吸気通路の機関側端面に向けて形成される前記第２機関側取付口金の第２円形中心Ｃを、絞り弁軸の長手軸心線Ｘ−Ｘより下側にａ偏芯させるとともに前記長手軸心線Ｘ−Ｘに直交し、第２吸気通路の中心Ｄを通る線Ｚ−Ｚより第１吸気通路側にｂ偏芯して配置したことを特徴とする。   In order to achieve the above object, the twin-barrel type double throttle body in the internal combustion engine for motorcycles according to the present invention is provided with a single twin-barrel type throttle body adjacent to and parallel to the throttle body. The first intake passage, the second intake passage, and the longitudinal axis of the first and second intake passages, and are arranged transversely across the first and second intake passages and each intake passage A first throttle valve that opens and closes the throttle valve shaft, a throttle valve shaft that is a single shaft to which the second throttle valve is attached, and a first intake passage that is below the first intake passage and is closer to the engine than the throttle valve. A first fuel injection valve that is disposed through a first spray escape hole that is continuously provided toward the engine, and a lower side of the second intake passage toward the second intake passage on the engine side from the throttle valve. From a second fuel injection valve that is disposed through a second spray escape hole that is continuously provided, and a throttle valve A circular shape that is formed toward the outer periphery of the engine-side end face of the first intake passage, surrounding the first spray escape hole that is connected to the first intake passage on the engine side from the first intake passage and throttle valve on the engine side Surrounding the first engine side mounting base, the second intake passage on the engine side from the throttle valve, and the second spray escape hole connected to the second intake passage on the engine side from the throttle valve, A second engine-side attachment base having a circular shape formed toward the outer periphery of the engine-side end face, and two single twin-barrel type throttle bodies are arranged side by side, The second intake passage of the twin barrel type throttle body on the side and the first intake passage of the twin barrel type throttle body on the other side are arranged to face each other, and the longitudinal axis of both throttle valve shafts is arranged on the same straight line Along with the first engine side installation of each twin barrel type throttle body In a twin barrel type dual throttle body in an internal combustion engine for a motorcycle in which a gold and a second engine side mounting cap are connected to the engine via a rubber mount, the engine side end face of the first intake passage of the single throttle body The first circular center A of the first engine side mounting base formed toward the center is decentered a below the longitudinal axis XX of the throttle valve shaft and is aligned with the longitudinal axis XX. The first cross section is formed so as to be decentered by b from the line Y-Y that is orthogonal and passes through the center B of the first intake passage toward the second intake passage, and is formed toward the engine side end surface of the second intake passage. The second circular center C of the two engine side mounting cap is decentered a below the longitudinal axis XX of the throttle valve shaft and orthogonal to the longitudinal axis XX, B eccentrically arranged on the first intake passage side from the line ZZ passing through the center D To.

一側のツインバレル型スロットルボデーと他側のツインバレル型スロットルボデーとは側方に２個隣設配置され、一側のツインバレル型スロットルボデーの第２機関側取付口金と、他側ツインバレル型スロットルボデーの第１機関側取付口金とは互いに対向して配置される。一側のツインバレル型スロットルボデーの第２機関側取付口金を形成する円形状をなす第２円形中心は、絞り弁軸の長手軸心線より下側にａ偏芯されるとともに第２吸気通路の中心を通り、絞り弁軸の長手軸心線に直交する線より第１吸気通路側にｂ偏芯して配置される。而して、第２機関側取付口金の円形中心は、第２吸気通路の中心が従来と変更されることなく、第１吸気通路方向にｂ引寄せられて形成される。又、他側ツインバレル型スロットルボデーの第１機関側取付口金を形成する円形状をなす第１円形中心は、絞り弁軸の長手軸心線より下側にａ偏芯されるとともに絞り弁軸の長手軸心線に直交し、第１吸気通路の中心を通る線より第２吸気通路側にｂ偏芯して配置される。而して、第１機関側取付口金の円形中心は第１吸気通路の中心が従来と変更されることなく、第２吸気通路方向にｂ引寄せられて形成される。以上によると、一側ツインバレル型スロットルボデーの第２機関側取付口金の他側端と、他側ツインバレル型スロットルボデーの第１機関側取付口金の一側端との間に対向して形成される間隙は、第１、第２吸気通路の中心が従来ピッチに維持された状態で、ｂ＋ｂに相当して大きく形成でき、これによって一側ツインバレル型スロットルボデーに配置される絞り弁軸の他端と、他側ツインバレル型スロットルボデーに配置される絞り弁軸の一端とを連結同調するための連結同調機構の配置の自由度を大きく向上できる。又、他側のツインバレル型スロットルボデーの第２機関側取付口金の他側端は、第２吸気通路の中心が従来と変更されることなくｂに相当して第１吸気通路側へ引寄せることができたので、その分間隙を増加できスロットルドラム等に対する配置の自由度を向上できる。更に又、一側のツインバレル型スロットルボデーの第１機関側取付口金の一側端は、第１吸気通路の中心が従来と変更されることなくｂに相当して第２吸気通路側へ引寄せることができたので、その分間隙を増加でき、スロットル開度センサー等に対する配置の自由度を向上できる。又、単一のツインバレル型スロットルボデー内における第１吸気通路と第２吸気通路とのピッチ及び一側のツインバレル型スロットルボデーの第２吸気通路と他側ツインバレル型スロットルボデーの第１吸気通路とのピッチが何等変更されることがないので、従来の機関に対して何等の変更がなく、互換性の高いツインバレル型２連スロットルボデーを提供できる。   The twin barrel type throttle body on one side and the twin barrel type throttle body on the other side are arranged side by side, the second engine side mounting base of the twin barrel type throttle body on the one side, and the other side twin barrel The first throttle body mounting base of the mold throttle body is disposed opposite to each other. The second circular center forming a circular shape forming the second engine side mounting base of the twin barrel type throttle body on one side is a-centered below the longitudinal axis of the throttle valve shaft, and the second intake passage And is eccentrically arranged b toward the first intake passage from a line orthogonal to the longitudinal axis of the throttle valve shaft. Thus, the circular center of the second engine-side mounting base is formed by being pulled toward the first intake passage without changing the center of the second intake passage from the conventional one. In addition, the first circular center that forms the first engine side mounting base of the other-side twin barrel type throttle body has a circular eccentricity a below the longitudinal axis of the throttle valve shaft, and the throttle valve shaft The first intake passage is arranged eccentrically on the second intake passage side with respect to the line passing through the center of the first intake passage. Thus, the circular center of the first engine side mounting cap is formed by being pulled toward the second intake passage without changing the center of the first intake passage from the conventional center. According to the above, it is formed between the other side end of the second engine side mounting base of the one side twin barrel type throttle body and the one side end of the first engine side mounting base of the other side twin barrel type throttle body. The gap to be formed can be made large corresponding to b + b with the center of the first and second intake passages maintained at the conventional pitch, and thereby the throttle valve shaft arranged in the one-side twin barrel type throttle body. The degree of freedom of the arrangement of the coupling tuning mechanism for coupling and tuning the other end and one end of the throttle valve shaft arranged in the other side twin barrel type throttle body can be greatly improved. Further, the other end of the second engine side mounting base of the twin barrel type throttle body on the other side draws toward the first intake passage side corresponding to b without changing the center of the second intake passage from the conventional one. As a result, the gap can be increased correspondingly, and the degree of freedom of arrangement with respect to the throttle drum or the like can be improved. Further, one end of the first engine side mounting base of the twin barrel type throttle body on one side is pulled toward the second intake passage side corresponding to b without changing the center of the first intake passage from the conventional one. As a result, the clearance can be increased by that amount, and the degree of freedom of arrangement with respect to the throttle opening sensor or the like can be improved. Also, the pitch between the first intake passage and the second intake passage in a single twin barrel type throttle body, the second intake passage of one side twin barrel type throttle body, and the first intake air of the other side twin barrel type throttle body. Since the pitch with the passage is not changed at all, there is no change with respect to the conventional engine, and a twin-barrel type dual throttle body with high compatibility can be provided.

以下、本発明になる自動二輪車用の内燃機関におけるツインバレル型２連スロットルボデーの一実施例について図１により説明する。尚、説明を容易にする為に、燃料噴射弁Ｊ１、Ｊ２の記載は省略された。又、図２、図３と同一構造部分については同一符号を使用し、説明を省略する。図２、図３に示されるものに対し、本実施例のものは、ツインバレル型スロットルボデーに形成される第１機関側取付口金と第２機関側取付口金が異なる。単一のツインバレル型スロットルボデーＳにおいて、第１絞り弁２３より機関側の吸気通路２０ａ及び第１絞り弁２３より機関側の吸気通路２０ａに向けて連設される第１噴霧逃げ孔２６Ａを囲繞して第１機関側取付口金１が形成されるもので、第１吸気通路の機関側端面２０ｂには、第１絞り弁２３より機関側の吸気通路２０ａと、第１噴霧逃げ孔２６Ａが開口するとともに絞り弁軸２２側に向けて取付け長さＬを有する第１機関側取付口金１が形成される。そしてこの第１機関側取付口金１は円形状に形成されるもので、この第１円形の中心Ａは、絞り弁軸２２の長手軸心線Ｘ−Ｘより下方Ｈにａ偏芯して配置され、更に絞り弁軸２２の長手軸心線Ｘ−Ｘに直交するとともに第１吸気通路２０の中心Ｂを通る線Ｙ−Ｙに対し、第２吸気通路２１側（図１において右側となる）にｂ偏芯した位置に配置される。（尚、かかる第１円形の直径は従来の第１円形の直径と同径に形成される）   An embodiment of a twin barrel type double throttle body in an internal combustion engine for a motorcycle according to the present invention will be described below with reference to FIG. Note that the description of the fuel injection valves J1 and J2 is omitted for ease of explanation. 2 and 3 are denoted by the same reference numerals, and description thereof is omitted. 2 and 3, the first embodiment side mounting base and the second engine side mounting base formed in the twin barrel type throttle body are different from those shown in FIGS. In the single twin-barrel type throttle body S, the first spray escape hole 26A provided continuously from the first throttle valve 23 toward the engine-side intake passage 20a and from the first throttle valve 23 toward the engine-side intake passage 20a is provided. A first engine side mounting base 1 is formed so as to surround the engine side end face 20b of the first intake passage with an intake passage 20a on the engine side from the first throttle valve 23 and a first spray escape hole 26A. A first engine side mounting base 1 is formed which opens and has a mounting length L toward the throttle valve shaft 22 side. The first engine side mounting base 1 is formed in a circular shape, and the center A of the first circle is arranged a eccentrically below the longitudinal axis XX of the throttle valve shaft 22 by a. Further, on the second intake passage 21 side (on the right side in FIG. 1) with respect to a line YY that is orthogonal to the longitudinal axis XX of the throttle valve shaft 22 and passes through the center B of the first intake passage 20. B is arranged at an eccentric position. (Note that the diameter of the first circle is the same as the diameter of the conventional first circle)

又、前記単一のツインバレル型スロットルボデーＳにおいて、第２絞り弁２４より機関側の吸気通路２１ａ及び第２絞り弁２４より機関側の吸気通路２１ａに向けて連設される第２噴霧逃げ孔２６Ｂを囲繞して第２機関側取付口金２が形成されるもので、第２吸気通路の機関側端面２１ｂには、第２絞り弁２４より機関側の吸気通路２１ａと、第２噴霧逃げ孔２６Ｂが開口するとともに絞り弁軸２２側に向けて取付け長さＬを有する第２機関側取付口金２が形成される。そしてこの第２機関側取付口金２は円形状に形成されるもので、この第２円形の中心Ｃは、絞り弁軸２２の長手軸心線Ｘ−Ｘより下方Ｈにａ偏芯して配置され、更に絞り弁軸２２の長手軸心線Ｘ−Ｘに直交するとともに第２吸気通路２１の中心Ｄを通る線Ｚ−Ｚに対し、第１吸気通路２０側（図１において左側となる）にｂ偏芯した位置に配置される。（尚、かかる第２円形の直径は従来の第２円形の中心と同径に形成される）   Further, in the single twin barrel type throttle body S, the second spray escape continuously provided from the second throttle valve 24 toward the engine side intake passage 21a and from the second throttle valve 24 toward the engine side intake passage 21a. A second engine side mounting base 2 is formed surrounding the hole 26B. The engine side end face 21b of the second intake passage is connected to the engine side intake passage 21a from the second throttle valve 24 and the second spray escape. A second engine side mounting base 2 having a mounting length L toward the throttle valve shaft 22 side is formed while the hole 26B is opened. The second engine side mounting base 2 is formed in a circular shape, and the center C of the second circle is arranged a eccentrically below the longitudinal axis XX of the throttle valve shaft 22 by a. Further, the first intake passage 20 side (on the left side in FIG. 1) with respect to the line ZZ that is orthogonal to the longitudinal axis XX of the throttle valve shaft 22 and passes through the center D of the second intake passage 21. B is arranged at an eccentric position. (The diameter of the second circle is the same as the center of the conventional second circle)

以上をもって単一のツインバレル型スロットルボデーＳが形成されるもので、かかる単一のツインバレル型スロットルボデーＳが側方に２個隣設配置される。すなわち図１において、その左方に一側のツインバレル型スロットルボデーＳ１が配置され、その右方に他側のツインバレル型スロットルボデーＳ２が配置されるもので、このとき一側のツインバレル型スロットルボデーＳ１に配置される絞り弁軸２２と、他側のツインバレル型スロットルボデーＳ２に配置される絞り弁軸２２の各長手軸心線Ｘ−Ｘは直線上に同芯に配置される。又、一側のツインバレル型スロットルボデーＳ１の第２吸気通路２１と他側のツインバレル型スロットルボデーＳ２の第１吸気通路２０、及び一側のツインバレル型スロットルボデーＳ１の第２機関側取付口金２の他側端２ａと、他側のツインバレル型スロットルボデーＳ２の第１機関側取付口金１の一側端１ａは互いに側方において隣設して対向配置される。更に単一のツインバレル型スロットルボデーＳにおいて第１吸気通路２０と第２吸気通路２１とのピッチＶ２は従来の図２に示されるピッチＶ２と同一に形成され、一側のツインバレル型スロットルボデーＳ１の第２吸気通路２１と、他側のツインバレル型スロットルボデーＳ２の第１吸気通路２０のピッチＶ１は従来の図２に示されるピッチＶ２と同一に形成される。   Thus, a single twin barrel type throttle body S is formed, and two such single twin barrel type throttle bodies S are arranged side by side. That is, in FIG. 1, a twin barrel type throttle body S1 on one side is arranged on the left side, and a twin barrel type throttle body S2 on the other side is arranged on the right side. The longitudinal axis X-X of the throttle valve shaft 22 arranged on the throttle body S1 and the throttle valve shaft 22 arranged on the other twin barrel type throttle body S2 are arranged concentrically on a straight line. Also, the second intake passage 21 of the twin barrel type throttle body S1 on one side, the first intake passage 20 of the twin barrel type throttle body S2 on the other side, and the second engine side mounting of the twin barrel type throttle body S1 on the one side. The other side end 2a of the base 2 and the one side end 1a of the first engine side mounting base 1 of the twin barrel type throttle body S2 on the other side are disposed adjacent to each other on the side. Further, in the single twin barrel type throttle body S, the pitch V2 between the first intake passage 20 and the second intake passage 21 is formed to be the same as the pitch V2 shown in FIG. The pitch V1 between the second intake passage 21 of S1 and the first intake passage 20 of the twin barrel type throttle body S2 on the other side is formed to be the same as the pitch V2 shown in FIG.

以上によってツインバレル型２連スロットルボデーが形成されるもので、これによると、一側のツインバレル型スロットルボデーＳ１の第２機関側取付口金２の他側端２ａと他側のツインバレル型スロットルボデーＳ２の第１機関側取付口金１の一側端１ａとの対向する間に形成される間隙Ｔを、図２に示される従来の間隙Ｔに対して（偏芯ｂ）＋（偏芯ｂ）に相当して大きく形成できる。すなわち一側のツインバレル型スロットルボデー１において、第２機関側取付口金２の第２円形の中心Ｃを、絞り弁軸２２の長手軸心線Ｘ−Ｘより下方Ｈに向けてａ偏芯させ、絞り弁軸２２の長手軸心線Ｘ−Ｘに直交し、且つ第２吸気通路２１の中心Ｄを通る線Ｚ−Ｚより第１吸気通路２０側にｂ偏芯させたことにより、一側のツインバレル型スロットルボデーＳ１の第２機関側取付口金２の他側端２ａを第１吸気通路２０側（図１において左側）にｂ移動することができたものである。一方、他側のツインバレル型スロットルボデーＳ２において、第１機関側取付口金１の第１円形の中心Ａを、絞り弁軸２２の長手軸心線Ｘ−Ｘより下方Ｈに向けてａ偏芯させ、絞り弁軸２２の長手軸心線Ｘ−Ｘに直交し、且つ第１吸気通路２０の中心Ｂを通る線Ｙ−Ｙより第２吸気通路２１側にｂ偏芯させたことにより、他側のツインバレル型スロットルボデーＳ２の第１機関側取付口金１の一側端１ａを第２吸気通路２１側（図１において右側）にｂ移動することができたものである。   Thus, a twin barrel type double throttle body is formed. According to this, the other side end 2a of the second engine side mounting base 2 of the twin barrel type throttle body S1 on one side and the twin barrel type throttle on the other side are formed. The gap T formed while the body S2 faces the one side end 1a of the first engine side mounting base 1 is set to (eccentric b) + (eccentric b) with respect to the conventional gap T shown in FIG. ) And can be formed larger. That is, in the twin barrel type throttle body 1 on one side, the second circular center C of the second engine side mounting base 2 is decentered a downward from the longitudinal axis XX of the throttle valve shaft 22 by a. By decentering from the line ZZ perpendicular to the longitudinal axis XX of the throttle valve shaft 22 and passing through the center D of the second intake passage 21 to the first intake passage 20 side, one side is obtained. The other end 2a of the second engine side mounting base 2 of the twin barrel type throttle body S1 can be moved b toward the first intake passage 20 (left side in FIG. 1). On the other hand, in the twin barrel type throttle body S2 on the other side, the first circular center A of the first engine side mounting base 1 is decentered from the longitudinal axis XX of the throttle valve shaft 22 downward H. And by decentering from the line YY perpendicular to the longitudinal axis XX of the throttle valve shaft 22 and passing through the center B of the first intake passage 20 to the second intake passage 21 side, The one side end 1a of the first engine side mounting base 1 of the side twin barrel type throttle body S2 can be moved to the second intake passage 21 side (right side in FIG. 1).

以上の如く、一側のツインバレル型スロットルボデーＳ１の第２機関側取付口金２の他側端２ａと他側のツインバレル型スロットルボデーＳ２の第１機関側取付口金１の一側端１ａとの対向する間に形成される間隙Ｔを、従来の間隙Ｔに対して（偏芯ｂ）＋（偏芯ｂ）に相当して大きく形成できたことによると、かかる間隙Ｔに配置される連結同調機構３０の配置の自由度を大きく向上することができたもので、二輪車の如く、かかるスロットルボデーを収納する収納空間が狭く限定されるものにおいて極めて効果的である。又、他側のツインバレル型スロットルボデーＳ２の第２機関側取付口金２の他側端２ａにあっても、従来のものに比較し、第１吸気通路２０側に向けてｂ移動して形成されるので、スロットルドラム３１の端部と第２機関側取付口金２の他側端２ａとの間に形成される間隙Ｔ１を偏芯ｂに相当して大きく形成できるので、全開調整レバー片３１ａ、アイドル調整片３１ｂを含むスロットルドラム３１の設計的自由度を向上できる。又、一側のツインバレル型スロットルボデーＳ１の第１機関側取付口金１の一側端１ａにあっても、従来のものに比較し、第２吸気通路２１側に向けてｂ移動して形成されるので、スロットル開度センサ３４の端部と、第１機関側取付口金１の一側端１ａとの間に形成される間隙Ｔ２を偏芯ｂに相当して大きく形成できるのでスロットル開度センサ３４の設計的自由度を向上できる。更に、かかるツインバレル型２連スロットルボデーにおいて、一側及び他側のツインバレル型スロットルボデーＳ１、Ｓ２内における第１吸気通路２０と第２吸気通路２１とのピッチＶ２及び一側のツインバレル型スロットルボデーＳ１の第２吸気通路２１と他側のツインバレル型スロットルボデーＳ２の第１吸気通路２０とのピッチＶ１は、従来のピッチと何等変更されることがないので、機関に対する互換性を有し、かかる実施を量産中においても即座に実施ができる。尚、スロットルドラム３１を、一側のツインバレル型スロットルボデーＳ１の第２機関側取付口金２と、他側のツインバレル型スロットルボデーＳ２の第１機関側取付口金１との間の間隙Ｔに配置してもよい。   As described above, the other end 2a of the second engine side mounting base 2 of the twin barrel type throttle body S1 on one side and the one side end 1a of the first engine side mounting base 1 of the twin barrel type throttle body S2 on the other side. According to the fact that the gap T formed between the two facing each other can be made larger than the conventional gap T corresponding to (eccentric b) + (eccentric b), the connection disposed in the gap T The degree of freedom of arrangement of the tuning mechanism 30 can be greatly improved, and it is extremely effective in a case where a storage space for storing such a throttle body is narrowly limited like a two-wheeled vehicle. Also, the other side end 2a of the second engine side mounting base 2 of the twin barrel type throttle body S2 on the other side is formed by moving b toward the first intake passage 20 as compared with the conventional one. Therefore, the gap T1 formed between the end portion of the throttle drum 31 and the other end 2a of the second engine side mounting base 2 can be formed large corresponding to the eccentricity b, so that the fully open adjustment lever piece 31a. The design freedom of the throttle drum 31 including the idle adjustment piece 31b can be improved. In addition, even at one side end 1a of the first engine side mounting base 1 of the twin barrel type throttle body S1 on one side, it is formed by moving b toward the second intake passage 21 as compared with the conventional one. Therefore, the gap T2 formed between the end of the throttle opening sensor 34 and the one end 1a of the first engine side mounting base 1 can be formed large corresponding to the eccentricity b, so that the throttle opening The degree of design freedom of the sensor 34 can be improved. Further, in the twin barrel type dual throttle body, the pitch V2 between the first intake passage 20 and the second intake passage 21 in the twin barrel type throttle bodies S1 and S2 on the one side and the other side and the twin barrel type on the one side. The pitch V1 between the second intake passage 21 of the throttle body S1 and the first intake passage 20 of the twin barrel type throttle body S2 on the other side is not changed at all from the conventional pitch, so that it has compatibility with the engine. However, such implementation can be performed immediately even during mass production. The throttle drum 31 is placed in a gap T between the second engine side mounting base 2 of the twin barrel type throttle body S1 on one side and the first engine side mounting base 1 of the twin barrel type throttle body S2 on the other side. You may arrange.

本発明の自動二輪車用の内燃機関におけるツインバレル型２連スロットルボデーの一実施例を示す要部正面図。1 is a front view of an essential part showing an embodiment of a twin barrel type double throttle body in an internal combustion engine for a motorcycle of the present invention. 従来のツインバレル型２連スロットルボデーの正面図。The front view of the conventional twin barrel type double throttle body. 図２のＰ−Ｐ線における要部縦断面図。The principal part longitudinal cross-sectional view in the PP line of FIG.

符号の説明Explanation of symbols

１ 第１機関側取付口金
２ 第２機関側取付口金
２０ 第１吸気通路
２１ 第２吸気通路
２２ 絞り弁軸
Ｓ 単一のツインバレル型スロットルボデー
Ｓ１ 一側のツインバレル型スロットルボデー
Ｓ２ 他側のツインバレル型スロットルボデー 1 1st engine side mounting base 2 2nd engine side mounting base 20 1st intake passage 21 2nd intake passage 22 Throttle valve shaft S Single twin barrel type throttle body S1 Twin barrel type throttle body on one side S2 On the other side Twin barrel type throttle body

Claims (1)

単一のツインバレル型スロットルボデーは、該スロットルボデー内に平行に隣設して穿設される第１吸気通路、第２吸気通路と、第１、第２吸気通路の長手軸心線に直交し、第１、第２吸気通路を側方に横断して配置されるとともに各吸気通路を開閉する第１絞り弁、第２絞り弁が取着された一本軸よりなる絞り弁軸と、第１吸気通路の下側であって、且つ絞り弁より機関側の第１吸気通路に向けて連設される第１噴霧逃げ孔を介して開口配置される第１燃料噴射弁と、第２吸気通路の下側であって、且つ絞り弁より機関側の第２吸気通路に向けて連設される第２噴霧逃げ孔を介して開口配置される第２燃料噴射弁と、絞り弁より機関側の第１吸気通路及び絞り弁より機関側の第１吸気通路に連設される第１噴霧逃げ孔を囲繞し、第１吸気通路の機関側端面の外周に向けて形成される円形状をなす第１機関側取付口金と、絞り弁より機関側の第２吸気通路及び絞り弁より機関側の第２吸気通路に連設される第２噴霧逃げ孔を囲繞し、第２吸気通路の機関側端面の外周に向けて形成される円形状をなす第２機関側取付口金とを、備え、前記単一のツインバレル型スロットルボデーが側方に２個隣設配置されることにより、一側のツインバレル型スロットルボデーの第２吸気通路と他側のツインバレル型スロットルボデーの第１吸気通路とが対向配置され、且つ両絞り弁軸の長手軸心線が同一直線上に配置されるとともに各ツインバレル型スロットルボデーの第１機関側取付口金、第２機関側取付口金がゴムマウントを介して機関に接続される自動二輪車用の内燃機関におけるツインバレル型２連スロットルボデーにおいて、前記単一のスロットルボデーの第１吸気通路２０の機関側端面２０ｂに向けて形成される前記第１機関側取付口金１の第１円形中心Aを、絞り弁軸２２の長手軸心線Ｘ−Ｘより下側Ｈにａ偏芯させるとともに前記長手軸心線Ｘ−Ｘに直交し、且つ第１吸気通路２０の中心Ｂを通る線Ｙ−Ｙより第２吸気通路２１側にｂ偏芯して配置し、一方、第２吸気通路２１の機関側端面２１ｂに向けて形成される前記第２機関側取付口金２の第２円形中心Ｃを、絞り弁軸２２の長手軸心線Ｘ−Ｘより下側Ｈにａ偏芯させるとともに前記長手軸心線Ｘ−Ｘに直交し、第２吸気通路２１の中心Ｄを通る線Ｚ−Ｚより第１吸気通路２０側にｂ偏芯して配置したことを特徴とする自動二輪車用の内燃機関におけるツインバレル型２連スロットルボデー。   The single twin-barrel type throttle body is orthogonal to the longitudinal axis of the first intake passage, the second intake passage, and the first and second intake passages that are formed adjacent to each other in parallel in the throttle body. A first throttle valve that is disposed laterally across the first and second intake passages and that opens and closes each intake passage; a throttle valve shaft that includes a single shaft to which the second throttle valve is attached; A first fuel injection valve disposed below the first intake passage and through a first spray escape hole provided continuously from the throttle valve toward the first intake passage on the engine side; A second fuel injection valve disposed below the intake passage through a second spray escape hole provided continuously from the throttle valve toward the second intake passage on the engine side; and the engine from the throttle valve A first spray escape hole that is connected to the first intake passage on the engine side from the first intake passage and the throttle valve on the engine side, and A first engine-side mounting base having a circular shape formed toward the outer periphery of the engine-side end face, a second intake passage on the engine side from the throttle valve, and a second intake passage on the engine side from the throttle valve. A second engine side mounting base that surrounds the second spray escape hole and is formed toward the outer periphery of the engine side end face of the second intake passage, and the single twin barrel type throttle body is provided with By arranging two adjacently on the side, the second intake passage of the twin barrel type throttle body on one side and the first intake passage of the twin barrel type throttle body on the other side are arranged to face each other, and both throttle valves For motorcycles in which the longitudinal axis of the shaft is arranged on the same straight line and the first engine side mounting base and the second engine side mounting base of each twin barrel type throttle body are connected to the engine via a rubber mount. Twin bar in internal combustion engine In the double-type double throttle body, the first circular center A of the first engine-side mounting base 1 formed toward the engine-side end face 20b of the first intake passage 20 of the single throttle body is used as a throttle valve shaft. The second intake air from a line YY that is eccentric to a lower side H from the longitudinal axis XX of 22 and orthogonal to the longitudinal axis XX and passes through the center B of the first intake passage 20. On the other hand, the second circular center C of the second engine side mounting base 2 formed toward the engine side end face 21b of the second intake passage 21 is arranged on the passage 21 side with an eccentricity b. Of the first intake passage 20 from a line ZZ that is perpendicular to the longitudinal axis XX and passes through the center D of the second intake passage 21. Twin barrel in an internal combustion engine for a motorcycle, characterized by being arranged eccentrically on the side b Twin throttle body.
JP2007131538A 2007-05-17 2007-05-17 Twin barrel type double throttle body in an internal combustion engine for motorcycles Expired - Fee Related JP4751366B2 (en)

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KR101330386B1 (en) * 2009-02-20 2013-11-15 미츠비시 쥬고교 가부시키가이샤 Track vehicle
JP2015158136A (en) * 2014-02-21 2015-09-03 株式会社ミクニ electronic control throttle device

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JP5881411B2 (en) * 2011-12-26 2016-03-09 株式会社ミクニ Throttle valve device
JP2021175879A (en) 2020-05-01 2021-11-04 株式会社ミクニ Throttle device

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JP4430552B2 (en) * 2005-01-18 2010-03-10 株式会社ケーヒン Intake device for V-type engine
JP4422073B2 (en) * 2005-06-07 2010-02-24 株式会社ケーヒン Multiple throttle body for motorcycles

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101330386B1 (en) * 2009-02-20 2013-11-15 미츠비시 쥬고교 가부시키가이샤 Track vehicle
JP2015158136A (en) * 2014-02-21 2015-09-03 株式会社ミクニ electronic control throttle device
US10316762B2 (en) 2014-02-21 2019-06-11 Mikuni Corporation Electronically controlled throttle device

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