1241377 Α7 Β7 經濟部中央標準局員工消費合作社印製 五、發明説明（） 〔產業上之利用領域〕 本發明係有關在每氣筒分別具有1個吸氣閥排氣閥之 雙閥發動機，特別，關於在吸氣通路的燃燒室開口部附近 之底壁設置吸氣控制閥的雙閥發動機的吸氣控制構造。 〔習知技藝〕 在如4閥發動機或5閥發動機之Μ高_出化爲目的， 每氣筒設置多數之吸氣閥而提高每1氣筒的充填效率之多 閥發動機，為了提高發動機的燃燒費率，把空燃比設定為 高而使之稀薄燃燒時，由於向燃燒室的吸氣開口面積大， 一 故在如低中速，低Α載蓮轉域之吸氣量少的蓮轉領域，有 時向燃燒室之吸氣的流速會變低，而使燃燒變成不安定。 為了因應此種情況，已有在發動機的吸氣通路之燃燒 室開口部近傍的底壁設置吸氣控制閥，在吸氣量少時，根 據吸氣控制閥把吸氣通路從底壁側縮小，一方面提高送入 到燃燒室的吸氣流之流速，同時使其氣流偏向頂壁側，根 據從吸氣通路的開口部流入之吸氣流在燃燒室內引起搖盪 (直旋渦〉，據此使稀薄燃燒的技術成為眾所周知（參照特 開平5-179965號公報）。 〔發明所要解決之課題〕 可是，在每氣筒分別各開口 1條根據吸氣閥所開閉的 吸氣通路和根據排氣閥所開閉之排氣通路的雙閥發動機， 由於向燃燒室之吸氣開口面積不會變大，在吸氣量少的蓮 轉領域往燃燒室之吸氣流速的降低也不大成為問題，因此 ，先前並未考慮到根據吸氣控制閥在燃燒室内引起搖盪Μ (請先閲讀背面之注意事項再填寫本頁)1241377 Α7 Β7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention () [Industrial fields of use] The present invention relates to a two-valve engine with one intake valve and one exhaust valve for each cylinder. In particular, The intake control structure of a two-valve engine in which an intake control valve is provided on the bottom wall near the opening of the combustion chamber in the intake passage. 〔Knowledge】 For multi-valve engines, such as 4-valve engines or 5-valve engines, in order to increase the filling efficiency of each cylinder, many intake valves are provided for each cylinder to increase the combustion cost of the engine. When the air-fuel ratio is set to be high to make it lean and burn, the area of the intake opening to the combustion chamber is large. Therefore, in the low-speed, low-A, low-A, low-load lotus transfer area, there is a small amount of intake, Sometimes the flow rate of the intake air into the combustion chamber becomes lower, and the combustion becomes unstable. To cope with this situation, an intake control valve has been provided on the bottom wall near the opening of the combustion chamber of the intake passage of the engine. When the amount of intake air is small, the intake passage is reduced from the bottom wall side according to the intake control valve. On the one hand, the flow rate of the suction air flowing into the combustion chamber is increased, and at the same time, the airflow is deflected toward the top wall side, and the suction air flowing from the opening of the suction passage causes shaking in the combustion chamber (straight vortex), and accordingly The technique of making lean combustion is well known (see Japanese Patent Application Laid-Open No. 5-179965). [Problems to be Solved by the Invention] However, each of the gas cylinders is opened with an intake passage opened and closed by an intake valve and an exhaust valve. Since the open-closed two-valve engine with exhaust passage does not increase the area of the intake opening to the combustion chamber, the decrease in the intake air flow rate to the combustion chamber in the lotus-turning area with a small amount of intake air is not a problem, so , Previously did not consider the vibration caused by the suction control valve in the combustion chamber (please read the precautions on the back before filling this page)
it 線 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） t 5 — 1241377 A7 B7 經濟部中央標準局員工消費合作社印製 i、發明説明（） 設法安定稀薄燃燒。 但是，在雙閥發動機，也在根據把空燃比設定為更高 而使發動機的燃料費率更提高時，為了避免由此發生之燃 燒的不安定化，當然也應該考慮到和多閥發動機時一樣地 設置吸氣控制閥以設法使燃燒安定化，在上述引用文獻（特 開平5-179965號公報）中，也具體地揭示有關於多閥發動 機（4閥發動機）之實施例，同時記載有能夠將此適用到2 閥發動機的意指。 可是 > 把如上述之多閥發動機做為實施例所揭示的周 ^ 知技術直接適用在2閥發動機時，結果，有時無法得到預 期之燃燒改良的效果。 因此，關於其原因進行撿討之結果，獲知如下的情況 成為原因之一。 亦即，在多閥發動機，係根據從多數的吸氣通路開口 部分別流入之吸氣流的相乘性氣流所引起之搖盪，將會強 化在多數的吸氣通路開口部之略中央位於燃燒室頂壁的中 心附近之火花塞的電極附近之吸氣流的攪亂，而能充份地 得到改良燃燒之效果。 相對地，在雙閥發動機，由於火花塞的電極係從燃燒 室之中心偏位而配置，所以根據從1個吸氣通路開口部流 入的吸氣流所引起之搖盪。係其主流將通過從火花塞離開 處，在火花塞的電極附近將成為氣流緩慢者，火花塞之電 極附近的根據吸氣流之攪亂將無法充份強化，而成爲不易 得到改良燃燒的效果者。 本紙張尺度適用中國國家標準（CNS ) A4¥( 210X297公釐） 6 (請先閔讀背面之注意事項再填寫本頁) -裝 •訂 4 線 1241377 A7 B7 經濟部中央標隼局員工消費合作社印製 五、發明説明（） 本發明之目的，係根據如上述之見識而消除在雙閥發 動機的改良燃燒之不妥，具體上，係在雙閥發動機，配設 吸氣控制閥，同時，使在燃燒室據此所引起的搖盪會對火 花塞之電極有效地作用，而能充份得到改良燃燒的效果者 〇 〔為了解決課題之方法〕 本發明，係為了解決上述課題且達成目的，主要係， 在從氣缸頭之下面所形成的燃燒室之頂壁向氣缸頭內分別 各拉入1條吸氣通路和排氣通路，分別在吸氣通路的燃燒 ^ 室開口部設置吸氣閥，在排氣通路之燃燒室開口部設置排 氣閥，從燃燒室的中心錯開而在燃燒室頂壁配置有火花塞 之電極的雙閥發動機，其特徵為，做為其吸氣控制構造， 在吸氣通路之燃燒室開口部近傍的底壁，設置把吸氣通路 從底壁側縮小用之吸氣控制閥，同時，使其上游側對吸氣 通路的燃燒室開口部，從燃燒室之中心觀察時將分配在和 火花塞相反側者。 〔作用〕 根據如上述的構成，即使火花塞之電極在從燃燒室的 中心錯開之位置，也將因為吸氣流會根據分配在對燃燒室 開口部和火花塞相反側的吸氣通路所導至，因此，根據吸 氣控制閥所縮小之吸氣流，在燃燒室內所引起的搖盪之主 流將會徧向火花塞側，在火花塞的電極附近之根據吸氣流 的攪亂將會充份強化。 〔實施例〕 (請先閱讀背面之注意事項再填寫本頁) ¾衣-- til 111— HI imit line This paper size is in accordance with China National Standard (CNS) A4 (210X 297 mm) t 5 — 1241377 A7 B7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs i. Description of the invention () Try to stabilize the lean burn. However, in the case of a two-valve engine, the fuel rate of the engine is also increased by setting the air-fuel ratio to a higher value. Of course, in order to avoid the instability of combustion caused by this, it is of course also necessary to consider the An intake control valve is provided in the same manner to stabilize the combustion. In the above-mentioned reference (Japanese Patent Application Laid-Open No. 5-179965), an embodiment of a multi-valve engine (4-valve engine) is also specifically disclosed. The idea that this can be applied to a 2-valve engine. However, when the known technology disclosed in the above-mentioned multi-valve engine is applied to a two-valve engine, the expected combustion improvement effect may not be obtained as a result. Therefore, as a result of the investigation of the cause, it was found that the following situation became one of the causes. That is, in a multi-valve engine, the vibration caused by the multiplicative air flow of the intake air flowing in from the majority of the intake passage openings is strengthened, and the combustion is strengthened at the slightly center of the intake passage openings. The suction current near the electrode of the spark plug near the center of the chamber top wall is disturbed, and the effect of improving combustion can be fully obtained. In contrast, in a two-valve engine, since the electrode system of the spark plug is deviated from the center of the combustion chamber, it is shaken by the suction air flowing from the opening of one suction passage. The mainstream will pass through the place where the spark plug exits, and it will become a slow air flow near the electrode of the spark plug. The disturbance of the suction current near the electrode of the spark plug will not be fully strengthened, and it will become difficult to obtain improved combustion effects. This paper size applies to Chinese National Standard (CNS) A4 ¥ (210X297mm) 6 (Please read the notes on the back before filling out this page)-Binding and binding 4 lines 1241377 A7 B7 Employee Consumer Cooperatives, Central Bureau of Standards, Ministry of Economic Affairs 5. The description of the invention (5) The purpose of the present invention is to eliminate the inconvenience of improved combustion in the two-valve engine based on the knowledge as described above. Specifically, the two-valve engine is equipped with an intake control valve. Those who cause the shaking caused in the combustion chamber to effectively act on the electrode of the spark plug and can fully improve the combustion effect. [Methods to solve the problem] The present invention is to solve the above problems and achieve the object, mainly In the system, an intake passage and an exhaust passage are respectively drawn into the cylinder head from the top wall of the combustion chamber formed below the cylinder head, and an intake valve is respectively provided in the opening of the combustion chamber of the intake passage. An exhaust valve is provided in the opening of the combustion chamber of the exhaust passage, and the double-valve engine is staggered from the center of the combustion chamber and an electrode of a spark plug is arranged on the top wall of the combustion chamber. Gas control structure: An intake control valve for reducing the intake passage from the bottom wall side is provided on the bottom wall near the opening of the combustion chamber of the intake passage, and the upstream side of the intake passage faces the combustion chamber opening of the intake passage. When viewed from the center of the combustion chamber, it will be distributed on the opposite side of the spark plug. [Operation] According to the structure described above, even if the electrode of the spark plug is staggered from the center of the combustion chamber, the intake air flow will be guided by the intake path distributed to the opening of the combustion chamber and the side opposite to the spark plug. Therefore, according to the suction current reduced by the suction control valve, the main flow of the shaking caused in the combustion chamber will spread to the spark plug side, and the disturbance based on the suction current near the electrode of the spark plug will be fully strengthened. [Example] (Please read the precautions on the back before filling this page) ¾ 衣-til 111— HI im
、1T — « nn m 11_· HI fm sv— 本紙張尺度適用中國國家標準（CNS ) A4洗怜（210X297公釐） 一 Ί 一 1241377 A7 B7 經濟部中央標準局員工消費合作社印製 五、發明説明（） 以下，根據圖面說明本發明之實施例。 再者，第1〜7圖係顯示本發明的一實施例者，第1 圖係顯示在多氣筒雙閥發動機之1個氣筒之主要部份直截 面圖，第2圖為第1圖的沿A-A線之截面圖，第3圖為第 2圖的沿B-B線之截面圖，第4圖顯示燃燒室頂壁的下面 ，第5圖顯示把吸氣通路之吸氣控制閥附近從上游側觀察 的狀態，第6圖係顯示吸氣控制閥之全開狀態，第7圖係 顯示吸氣控制閥的全閉狀態。 雙閥發動機1，係把氣缸體3和氣缸頭4疊層在曲柄 一 外殼2上而以頭螺栓10結合，把頭蓋7著裝在氣缸頭4的 吸氣凸輪軸5和排氣凸輪軸6之上者，在氣缸體3所形成 的氣缸内徑3a内自由滑動地插入有活塞8，而活塞8將以 連桿9連結在未圖示之曲柄軸。 在氣缸頭4，有在各氣筒的燃燒室為了構成其頂壁4a 用之凹部形成在其下面，根據該凹部4a和氣缸頭3的氣缸 內徑3a和活塞8，在各氣筒分別擊成有燃燒室。 從該氣缸頭下面的凹部，亦即，從燃燒室之頂壁4a分 別有吸氣通路11和排氣通路12各拉出1條至氣缸頭4内， 吸氣通路11和排氣通路12的各燃燒室開口部1 la、12a係分 別配置在挾箸燃燒室頂壁4a之天花板部4b對向的傾斜部份 ，而在吸氣通路11之燃燒室開口部1 1 a設有吸氣閥1 5，在 排氣通路12的燃燒室開口部12a設有排氣閥16。 關於吸氣閥15及排氣閥16，係各別之閥捍15a，16a在 氣缸的軸方向之面會成所定的挾角地，互相向相反方向斜 (請先閲讀背面之注意事項再填寫本頁) * VMM··· gl-i · •言 m· fuj ί < 線 本紙張尺度適用中國國家標準（CNS ) A4%格（210X297公釐） 8 1241377 A7 B7 經濟部中央標準局員工消費合作社印製， 1T — «nn m 11_ · HI fm sv— This paper size is applicable to Chinese National Standard (CNS) A4 Washing (210X297 mm) Ί 124 1241377 A7 B7 Printed by the Staff Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs () Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, Figs. 1 to 7 show an embodiment of the present invention. Fig. 1 is a cross-sectional view of a main part of a cylinder of a multi-cylinder dual-valve engine. Fig. 2 is a diagram illustrating the edge of Fig. 1. AA cross section, Fig. 3 is a cross section taken along line BB in Fig. 2. Fig. 4 shows the lower surface of the top wall of the combustion chamber. Fig. 5 shows the vicinity of the intake control valve in the intake passage viewed from the upstream side. Fig. 6 shows the fully opened state of the intake control valve, and Fig. 7 shows the fully closed state of the intake control valve. The double-valve engine 1 is composed of a cylinder block 3 and a cylinder head 4 laminated on a crank case 2 and combined with a head bolt 10, and a head cover 7 is mounted on an intake camshaft 5 and an exhaust camshaft 6 of the cylinder head 4. In the former, a piston 8 is slidably inserted into a cylinder inner diameter 3 a formed by the cylinder block 3, and the piston 8 is connected to a crank shaft (not shown) by a connecting rod 9. In the cylinder head 4, recesses for forming the top wall 4a of the combustion chambers of the cylinders are formed below the recesses. The recesses 4a and the cylinder inner diameter 3a of the cylinder head 3 and the piston 8 are respectively formed in the cylinders. Combustion chamber. From the recess below the cylinder head, that is, from the top wall 4a of the combustion chamber, there are respectively one suction passage 11 and one exhaust passage 12 drawn into the cylinder head 4. The suction passage 11 and the exhaust passage 12 Each of the combustion chamber openings 11a and 12a is disposed at an inclined portion facing the ceiling portion 4b of the top wall 4a of the combustion chamber, and an intake valve is provided in the combustion chamber opening 11a of the intake passage 11. 15. An exhaust valve 16 is provided in the combustion chamber opening 12a of the exhaust passage 12. The suction valve 15 and the exhaust valve 16 are separate valves 15a and 16a. The surfaces of the cylinders in the axial direction of the cylinders will form a predetermined angle, and will be inclined in opposite directions. (Please read the precautions on the back before filling in this Page) * VMM ··· gl-i · • language m · fuj ί < Thread paper size is applicable to Chinese National Standard (CNS) A4% grid (210X297 mm) 8 1241377 A7 B7 Staff Consumer Cooperative of Central Standards Bureau, Ministry of Economic Affairs Print
五、發明説明（) 上方延伸，在各閥桿15a、16a上端之吸氣升降桿15b及排 氣升降桿16b和氣缸頭4之間，分別經由閥殫簧15c、16c 把吸，排氣閥15、16著裝在氣缸頭4。 該吸氣閥15及排氣閥16，皆係根據各別的閥彈簧15c 、16c經常向閉方向加勢，同時，根據在各升降桿15b、16b 上配設成和氣缸的軸方向成直角且互相平行之吸氣凸輪軸 5及排氣凸輪軸6，直接式經由固定臂，抗拒閥彈簧15c 、16c的彈力推壓各升降桿15b、16b，而將向開方向移動 者。 一 在根據吸氣閥15開閉其燃燒室11a的吸氣通路11，在 燃燒室開口部1 la附近之底壁設有吸氣控制閥18，在其上 _ 游，有經由連接管20，接頭21，連接有根據節滾操作而開 閉的蝶式節流閥31，和根據發動機之吸氣A壓而自動地開 閉的活塞閥32之自動可變文丘里（Venxuri)式的氣化器 30 〇 吸氣控制閥18,係做為橫跨各氣筒之吸氣通路Π配置 的能夠轉動之1條共通的轉動軸]7之一部份所形成者，其 下方橫過埋設在吸氣通路Π的底壁之轉動軸17的吸氣通路 11之上方，成為沿箸吸氣通路11的底壁上面之缺口形狀， 該缺口的剩餘部份將做為閥而機能者。 再者，雖未圖示，但是在形成吸氣閥1 8的旋轉軸17之 外端部固定有控制帶輪，該帶輪係和固定在控制馬達的驅 動帶輪K鋼索連結，根據由節流開度察覺器之節流閥的開 度信號和由旋轉察覺器之發動機旋轉速度信號，經由ECU (請先閲讀背面之注意事項再填寫本頁)V. Description of the invention () Extending above, between the suction lift rod 15b and the exhaust lift rod 16b at the upper ends of the valve rods 15a, 16a and the cylinder head 4, the suction and exhaust valves are sucked through the valve springs 15c and 16c, respectively. 15,16 dress on the cylinder head 4. The intake valve 15 and the exhaust valve 16 are always biased in the closing direction according to the respective valve springs 15c and 16c. At the same time, the lift rods 15b and 16b are arranged at right angles to the axial direction of the cylinder and The intake camshaft 5 and the exhaust camshaft 6 that are parallel to each other directly push the lifting rods 15b and 16b against the elastic force of the valve springs 15c and 16c via the fixed arm, and will move in the open direction. An intake passage 11 that opens and closes the combustion chamber 11a according to the intake valve 15 is provided with an intake control valve 18 on the bottom wall near the opening 11a of the combustion chamber. There is a connecting pipe 20 and a joint above it. 21. An automatic variable Venxuri type gasifier 30 connected to a butterfly valve 31 which is opened and closed according to a rolling operation and a piston valve 32 which is automatically opened and closed according to an intake A pressure of an engine. The suction control valve 18 is formed as a part of a common rotating shaft that can be rotated across the suction path Π of each gas cylinder] 7, and the lower part of the suction control valve 18 crosses the Above the suction passage 11 of the rotating shaft 17 of the bottom wall, a notch shape is formed along the bottom wall of the suction passage 11, and the remaining part of the notch will function as a valve. Furthermore, although not shown, a control pulley is fixed to the end of the rotating shaft 17 forming the intake valve 18, and the pulley train is connected to a driving pulley K steel cable fixed to the control motor. The opening signal of the throttle valve of the flow opening sensor and the engine rotation speed signal of the rotating sensor are passed through the ECU (please read the precautions on the back before filling this page)
裝------訂—— II n He (m 1_ In i·—- i m «1— 1 本紙張尺廋適用中國國家棵準（CNS ) A4規格（210X297公釐） 9 1241377 A 7 B7 經濟部中央標準局員工消費合作社印製 五、發明説明（） ，控制馬達，將使吸氣控制閥在如低中速，低A載蓮轉域 的吸入空氣量少時向閉方向，在如高速。高負載蓮轉域之 吸入空氣量多時向開方向，分別轉動。 可是，如第2圖所示，從氣缸上方觀察時，吸氣通路 11和排氣通路12的各燃燒室開口部11a、12a，係配置成連 結此等的中心之線會通過燃燒室的略中心地，把燃燒室頂 壁4a之天花板部4b挾在其間而對向，在通過燃燒室的略中 心連結各燃燒室開口部11a、12a之中心的線之一側，在從 燃燒室的中心離開之位置，有火花塞50安裝在燃燒室頂壁 / 4a 〇 同時，吸氣通路11的從燃燒室開口部1U向氣化器之 連接部21延伸到上游側的吸氣通路11，係對吸氣通路11之 燃燒室開口部1 la，Μ通過燃燒室的略中心連結各燃燒室 開口部1 la、12a的中心之線做為基準，分配在和安裝火花 塞50之側相反側。 關於該吸氣通路11的吸氣控制閥18附近，係如第5圖 所示，由於吸氣通路11全體對燃燒室開口部1 la和火花塞 50向相反側偏位，同時，吸氣控制閥1 8上方的吸氣通路11 之頂壁，係根據閥導件14的突面部4c向下方突出而鼓脹， 所Μ該部份的吸氣通路11之截面形狀，係成為中央部份變 窄的凹形。 同時，在燃燒室頂壁4a下面，如第3及4圖所示，和 配置火花塞50的電極51之側相反側，有形成直壁4e向下方 突出的切斷部4d，根據該切斷部4d之直壁4e和吸氣閥15將 (請先閲讀背面之注意事項再填寫本頁) :裝· 訂 k 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 經濟部中央標準局員工消費合作社印製 1241377 A7 B7 五、發明説明（） 保持掩蔽效果，而會產生從切斷部4d的直壁4e向火花塞側 之吸氣流。 關於根據具有如上述構成的雙閥發動機之吸氣控制閥 18的吸氣流之控制，係在如高速。高負載蓮轉域的吸氣量 多時，吸氣控制閥18將會向開方向轉動至其缺口面和吸氣 通路之底壁略成同一平面為止，如第6(A)，（B)圖所示， 吸氣流將Μ吸氣通路11全開的狀態送入至燃燒室，在如低 中速、低Α載蓮轉域之吸氣量少時，吸氣控制閥18將使其 缺口面會立起地向閉方向轉動，如第7(A)、（B)圖所示， /吸氣通路11的底壁側將會縮小成全閉狀態，吸氣流將通過 閥18之上緣和吸通路11的頂壁之間送入到燃燒室。 因此，卽使在吸氣量少時，送入到燃燒室的吸氣流之 速度也將上升，同時由於吸氣流將會向吸氣通路11的頂壁 側偏位，能夠對吸氣流給予方向性，而在燃燒室引起搖m 〇 而且，根據送入到燃燒室的吸氣流所引起之搖盪，由 於對吸氣通路11的開口部11 a，其上游側係分配在和火花 塞50之電極5 1相反側，故如第3及4圖以箭頭記號所示， 將從燃燒室開口部1 la向火花塞50的電極5 1側偏位而引起 ，搖盪之主流將會通過火花塞50的電極51附近。 Μ上，係關於本發明之雙閥發動機的吸氣控制構造之 一實施例說明，但是本發明並不限定於此，例如，實施例 雖為適用在根據自動可變文丘里式的氣化器供給燃料之形 式的雙閥發動機者，但是，也能夠適用在根據燃料噴射閥 本纸張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） - 11 - (請先閲讀背面之注意事項再填寫本頁) -裝 訂 1241377 Α7 Β7 經濟部中央標準局員工消費合作社印製 五、發明説明（） 供给燃料之形式的雙閥發動機，同時，關於吸氣控制閥18 之部份而言，也能夠有如第8〜12圖所示的各種變形例。 亦即，第8(A)、8(B)圖所示者，係在全閉狀態之吸氣 控制閥18的上緣18a切成緩和之凹狀者，Μ吸氣控制閥18 縮小時的吸氣通路11之中央窄截面部的面積被擴大者。 再者，第11圖所示者，係切掉在全閉狀態之吸氣控制 閥18的上緣18a之突面部4c:下方的部份，Μ吸氣控制閥18 縮小時之吸氣通路11的中央窄截面部之面積已被擴大，同 時，在吸氣控制閥18的底面18c設有把積存在控制閥上游 〆 之燃料排放到下游用的溝18d者。 並且，同時，第12圖所示者，係在吸氣控制閥18之底 面設有溝18e，同時在和吸氣控制閥18本體使之具有空隙 地沿著缺口面18b附設板體18f者，在如此者，開閥時積存 在控制閥上游的燃料將會從溝沿著板體18ί被吸出，該 吸出之燃料將會順箸流入到燃燒室的吸氣流被微粒化.，而 供給到燃燒室。 〔發明之效果〕 如以上所述，根據本發明之雙閥發勳機的吸氣控制構 造時，根據配設在吸氣通路底壁之吸氣控制閥所縮小的吸 氣流在燃燒室內所引起之搖盪，將會變成對於從燃燒室中 心錯開配置的火花塞之電極有效地作用者，所Μ能夠有效 地進行在雙閥發動機的改良稀薄燃燒。 圖面之簡單說明： (請先閱讀背面之注意事項再填寫本頁) 裝，-- 、11 線 -fm tn« mi mi 11 me 本紙張尺度適用中國國家標準（CNS ) A4規斧（2IOX297公釐） 12 1241377 經濟部中央標準局員工消費合作社印製 A7 B7五、發明説明（） 〔第1圖〕 顯示本發明之雙閥發動機的吸氣控制構造之一實施例 的直截面圖。 〔第2圖〕 第1圖所示之賁施例的沿第ΙΑ-A圖線之橫截面圖。 〔第3圖〕 第1圖所示的實施例之沿第2B-B圖線的直截面圖。 〔第4圖〕 第1圖所示之實施例的燃燒室頂壁之下面圖。 / 〔第5圖〕 顯示把第1圖所示的實施例之吸氣控制閥附近的吸氣 通路從上游側觀察之狀態的説明圖。 〔第6圖〕 顯示在第1圖所示之實施例吸氣控制閥為全開狀態的 (A)把吸氣通路從上游側觀察之說明圖，以及，（B)在其狀 態的吸氣控制閥之中央部直截面圖。 〔第7圖〕 顯不在第1圖所不之實施例中吸氣控制_為合閉狀態 的（A)把吸氣通路從上游側觀察之說明画，以及，（B〉在其 狀態的吸氣控制閥之中央部直截面圖。 〔第8圖〕 顯示本發明的吸氣控制閥部份之第1變形例的（A)把 吸氣控制閥為全閉之狀態從上游側觀察吸氣通路的說明圖 ，以及，（B)在其狀態的吸氣控制閥之中央部直截面圖。 (請先閲竣背面之注意事項再填寫本頁) n«i 訂 線 -ϋιβ ϋ—* 本纸張尺度適用中國國家標準（CNS ) A4胡( 210X297公釐） 1241377 A7 B7 五、發明説明（ 經濟部中央標準局員工消費合作社印製 〔第9圖〕 關於本發明的吸氣控制閥部份之第2變形例，顯示把 全閉的吸氣控制閥從上游側觀察吸氣通路之狀態的說明圖 0 〔第10圖〕 關於本發明的吸氣控制閥部份之第3變形例，顯示把 全閉的吸氣控制閥從上游側觀察吸氣通路之狀態的說明圖 〇 〔第11圖〕 顯示本發明之吸氣控制閥部份的第4變形例之（A>把 吸氣控制閥爲全閉的狀態從上游側觀察吸氣通路之說明圖 ,以及，（B〉在其狀態的吸氣控制閥之中央部直截面圖。 〔第12圖〕 顯示本發明的吸氣控制閥部份之第5變形例的（A)吸 氣控制閥之中央部直截面圖，Μ及，（B)吸氣控制閥的橫 截面圖。 〔記號之說明〕 I 雙閥發動機 4a 燃燒室的頂壁 II 吸氣通路 11a吸氣通路之燃燒室開口部 12 排氣通路 12a排氣通路之燃燒室開口部 %/15 吸氣閥 (請先H讀背面之注意事項再填寫本頁) .裝-- 訂— me m 111 -11-:-i tig — 線 本紙張尺度適用中國國家標準（CNS ) Α4終格（21〇Χ297公釐） 14 1241377 A7 B7 五、發明説明（） 16 排氣閥 18 吸氣控制閥 50 火花塞 51 火花塞之電極 (請先閱讀背面之注意事項再填寫本頁) 裝-- 訂 經濟部中央標準局員工消費合作杜印製 w In I ml nn · 本紙張尺度適用中國國家標準（CNS ) A4規格/ 210X297公釐）------ Order—— II n He (m 1_ In i ·-im «1— 1 This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) 9 1241377 A 7 B7 Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. 5. Description of the invention () Controlling the motor will make the intake control valve close to the low intake air volume, such as low and medium speed, and low A load lotus transfer zone. High speed. When the amount of intake air in the high-load lotus transfer zone is large, it turns in the open direction and rotates separately. However, as shown in Figure 2, when viewed from above the cylinder, each combustion chamber opening of the intake passage 11 and exhaust passage 12 11a and 12a are arranged so that the lines connecting these centers will pass through the combustion center slightly, and the ceiling portion 4b of the combustion chamber top wall 4a will be opposed to each other, and each combustion will be connected at the approximate center of the combustion chamber. On one side of the center line of the chamber openings 11a and 12a, a spark plug 50 is installed on the top wall of the combustion chamber at a position away from the center of the combustion chamber / 4a. At the same time, the intake passage 11 is directed from the combustion chamber opening 1U to The connection part 21 of the gasifier extends to the suction path 11 on the upstream side, The combustion chamber opening 11a of the passage 11 is connected to the center of each combustion chamber opening 11a, 12a through the approximate center of the combustion chamber as a reference, and is allocated on the side opposite to the side where the spark plug 50 is installed. The vicinity of the intake control valve 18 of the passage 11 is shown in FIG. 5. As the entire intake passage 11 is offset from the combustion chamber opening 11 a and the spark plug 50 to the opposite side, at the same time, the upper part of the intake control valve 18 The top wall of the suction passage 11 bulges downward according to the protruding portion 4c of the valve guide 14, so that the cross-sectional shape of the suction passage 11 in this part becomes a concave shape with a narrowed central portion. Below the combustion chamber top wall 4a, as shown in Figs. 3 and 4, on the opposite side to the side on which the electrode 51 of the spark plug 50 is arranged, there is a cut-out portion 4d forming a straight wall 4e protruding downward, and according to the cut-out portion 4d, The straight wall 4e and the suction valve 15 will (please read the precautions on the back before filling in this page): binding and ordering. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm). Central Bureau of Standards, Ministry of Economic Affairs Printed by Employee Consumer Cooperative 1241377 A7 B7 V. Description of Invention ( The masking effect is maintained, and an intake air flow from the straight wall 4e of the cut-off portion 4d to the spark plug side is generated. Regarding the control of the intake air flow by the intake control valve 18 of the two-valve engine having the configuration described above, High speed. When there is a large amount of suction in the high-load lotus transfer zone, the suction control valve 18 will turn in the open direction until its notch surface and the bottom wall of the suction passage are slightly the same plane, as shown in Section 6 (A), ( B) As shown in the figure, the suction air flow sends the M suction path 11 to the combustion chamber in a fully opened state. When the amount of suction in the low-medium-speed, low-A-load transfer zone is small, the suction control valve 18 will cause The notched surface will stand up and rotate in the closing direction. As shown in Figures 7 (A) and (B), the bottom wall side of the suction path 11 will be reduced to a fully closed state, and the suction flow will pass through the valve 18 The upper edge and the top wall of the suction passage 11 are fed into the combustion chamber. Therefore, when the amount of the intake air is small, the speed of the intake air flow that is sent to the combustion chamber will also increase. At the same time, the intake air flow will be deviated to the top wall side of the intake passage 11, and the intake air flow can be adjusted. Given directionality, the combustion chamber is shaken m. Furthermore, according to the swing caused by the suction air flow sent to the combustion chamber, the upstream side of the opening 11a to the suction passage 11 is allocated to the spark plug 50. Since the electrode 51 is on the opposite side, as shown by the arrow marks in FIGS. 3 and 4, it will be caused by the deviation from the combustion chamber opening 11a to the electrode 51 side of the spark plug 50, and the mainstream of shaking will pass through the spark plug 50. Near the electrode 51. In the above description, one embodiment of the suction control structure of the two-valve engine of the present invention is explained, but the present invention is not limited to this. For example, the embodiment is applicable to an automatic variable venturi-type gasifier Those who supply a two-valve engine in the form of fuel. However, it can also be applied to the Chinese national standard (CNS) A4 specification (210X297 mm) according to the paper size of the fuel injection valve-11-(Please read the precautions on the back before (Fill in this page)-Binding 1241377 Α7 Β7 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention () Dual-valve engine in the form of fuel supply There are various modifications as shown in FIGS. 8 to 12. That is, those shown in Figs. 8 (A) and 8 (B) are those in which the upper edge 18a of the intake control valve 18 in the fully closed state is cut into a gentle concave shape, and The area of the narrow central portion of the intake passage 11 is enlarged. In addition, as shown in FIG. 11, the protruding portion 4c of the upper edge 18a of the intake control valve 18 in the fully closed state is cut off: the intake passage 11 when the M intake control valve 18 is reduced. The area of the central narrow cross-section portion has been enlarged, and at the same time, a groove 18d for discharging fuel accumulated in the upstream of the control valve to the downstream is provided on the bottom surface 18c of the intake control valve 18. Meanwhile, as shown in FIG. 12, a groove 18e is provided on the bottom surface of the intake control valve 18, and a plate body 18f is attached along the notch surface 18b with a gap between the intake control valve 18 body, In this case, the fuel accumulated upstream of the control valve when the valve is opened will be sucked out from the groove along the plate body 18, and the sucked fuel will be atomized into the suction air flowing into the combustion chamber and supplied to the combustion. room. [Effects of the Invention] As described above, according to the intake control structure of the two-valve engine according to the present invention, the intake air flow reduced by the intake control valve provided on the bottom wall of the intake passage is stored in the combustion chamber. The turbulence caused will effectively act on the electrodes of the spark plugs staggered from the center of the combustion chamber, so that it can effectively perform improved lean combustion in a two-valve engine. Brief description of the drawing: (Please read the precautions on the back before filling out this page) Installation,-, 11 lines-fm tn «mi mi 11 me This paper size applies the Chinese National Standard (CNS) A4 Axe (2IOX297 public 12) 1212377 Printed by the Consumer Standards Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs A7 B7 V. Description of the Invention () [Figure 1] A cross-sectional view showing one embodiment of the suction control structure of the two-valve engine of the present invention. [Fig. 2] A cross-sectional view of the embodiment shown in Fig. 1 along the line IA-A. [Fig. 3] A cross-sectional view of the embodiment shown in Fig. 1 along the line 2B-B. [Fig. 4] A bottom view of the top wall of the combustion chamber of the embodiment shown in Fig. 1. / [Fig. 5] An explanatory view showing a state in which the intake passage near the intake control valve of the embodiment shown in Fig. 1 is viewed from the upstream side. [Fig. 6] (A) An illustration of an intake passage viewed from the upstream side, and (B) Intake control in its state showing that the intake control valve of the embodiment shown in Fig. 1 is fully opened. Straight sectional view of the central part of the valve. [Fig. 7] The suction control in the embodiment shown in Fig. 1 is not shown. (A) An illustration of the suction path viewed from the upstream side, and (B) the suction in its state. Straight cross-sectional view of the central portion of the air control valve. [Figure 8] (A) The first modification of the air intake control valve portion of the present invention is shown. (A) The air intake control valve is fully closed. An explanatory drawing of the passage, and (B) a cross-sectional view of the central portion of the suction control valve in its state. (Please read the precautions on the back before completing this page) n «i Thread- 线 ιβ ϋ— * This Paper size applies Chinese National Standard (CNS) A4 Hu (210X297 mm) 1241377 A7 B7 V. Description of the invention (printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs [Figure 9] About the suction control valve of the present invention The second modification is an explanatory view showing a state in which the fully closed intake control valve is viewed from the upstream side of the intake passage. [Fig. 10] A third modification of the intake control valve portion of the present invention is shown. Explanatory diagram of the state where the intake passage is viewed from the upstream side with the fully closed intake control valve 〇 [Fig. 11] A fourth modification of the intake control valve portion of the present invention (A > An explanatory view of the intake passage viewed from the upstream side with the intake control valve fully closed, and (B 〉 A cross-sectional view of the central portion of the intake control valve in its state. [Figure 12] (A) A cross-sectional view of the central portion of the intake control valve showing a fifth modification of the intake control valve portion of the present invention. (M) and (B) Cross-sectional views of the intake control valve. [Explanation of symbols] I Double-valve engine 4a Top wall of the combustion chamber II Intake passage 11a Combustion chamber opening 12 in the intake passage Exhaust passage 12a Row Combustion chamber opening in the air passage% / 15 Suction valve (please read the precautions on the back before filling this page). Installation-Order — me m 111 -11-:-i tig — Line paper size is applicable to China National Standard (CNS) Α4 final grid (21 × 297 mm) 14 1241377 A7 B7 V. Description of invention () 16 Exhaust valve 18 Intake control valve 50 Spark plug 51 Electrode of spark plug (Please read the precautions on the back before filling (In this page) Binding-Ordering the consumer cooperation of the Central Bureau of Standards of the Ministry of Economic Affairs, printed in In ml ml nn · This paper size applies to China National Standard (CNS) A4 size / 210X297 mm