經濟部中央標準局員工消费合作社印製 S11968 a? ___B7___ 五、發明説明（！） 〔發明所靥之技術頜域〕 ’· 本發明係關於一種至少在低負載運轉時，將燃燒室內 之新鮮氣體自動點火燃燒，亦即能活性熱氣氛燃燒的具備 燃燒控制裝置之火花點火式二衝程內燃機。 〔以往之技術〕 以往之火花點火式二衝程內燃機中，在氣缸孔之內周 面形成有藉活塞施以開閉的排氣通路與驅氣逋路，曲柄室 v 內被預壓之新鮮氣體從驅氣通路供應於氣缸孔頂部之燃燒 室內丨.而且該燃燒室內之已經燃燒氣體從掃氣通路被排出 至排氣通路，而在該燃燒室內被壓縮之新鮮氣體藉由火星 塞施以點火.。 在這種以往之火花點火式二衝程內燃機中，增大排氣 氣體中之未燃燒碳化氫量，而惡化燃燒。 爲了解決這種問題，開發了適當地控制依活塞所產生 之排氣開口關閉時之燃燒室內壓力，藉由殘·留於燃燒室之 已經燃燒氣體之熱能量使燃燒室內之新鮮氣體予以活性化 ，在內燃機之運轉理想之點火時期可將燃燒室內之新鮮氣 體施以自動點火的內燃機，經本案申請人提出專利申請（ 日本專利公報特開平7 — 7 1 2 7 9號）。 〔欲解決之課題〕 在上述具備燃燒控制裝置之火花點火式二衝程內燃機 ，例如空轉運轉領域，在節流閥開度較小之狀態，即使節 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 、-β 線 經濟部中央樣準局員工消費合作社印装 A7 ____B7_ 五、發明説明（2 ) 流排氣控制閥，在上次循環增加在燃燒室內所燃燒之已經 燃燒氣體之殘留量，以上昇該已經燃燒氣體之溫度，俾自 動點火新鮮氣體，則在節流閥被節流時，對應於此而燃燒 供應量也減少，包括燃燒室內之殘留已經燃燒氣體的新鮮 氣體無法達到自動點火溫度，因而新鮮氣體有無法自動點 火之情形。 爲了改善該問題，在將衝程容稹成爲一定之狀態下， 仍減少燃燒室容積，增大壓縮比，並增大上死點近旁的燃 燒室內溫度時，則在高負載運轉狀態容易產生爆震（ Knock i. ng )，因而未具實用性。 〔解決課題所用之手段及效果〕 本發明係關於一種克服這些困難點的具備燃燒控制裝 置之火花點火式二衝程內燃機之改良，係屬於至少隨著內 燃機轉速成節流閥開度，驅動排氣控制閥俾控制排氣通路 入-口或該排氣通路內之通路開口面積，至少在低負載運轉 時藉自動點火燃燒燃燒室內之新鮮氣體的具備燃燒控制裝 置之火花點火式二衝程內燃機，其特徵爲：具備隨著內燃 機之運轉狀況增減上述燃燒室之容積的燃燒室容積調整手 段者。 因本發明係如上述地所構成，因此節流閥被節流之供 氣量及燃燒供應量少之低負載運轉時，尤其是，在空轉運 轉時，以上述燃燒室容積調整手段來減少上述燃燒室之容 積，藉由增大壓縮比，包括該燃燒室內之殘留已經燃燒.氣 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） (請先聞讀背面之注意事項再填寫本頁) 訂 A7 B7 311968 五、發明説明（3 ) 體的新鮮氣體被急激地隔熱壓縮，結果，該燃瘵室內之新 鮮氣體被自動點火而可實行活性熱氣氛燃燒，因而可抑制 未燃燒碳化氫之排出，而且改善燃燒。 又，在本發明中，節流閥打開之一般運轉狀態，尤其 是在容易產生爆震之高負載低速運轉狀態下，藉由上述燃 燒室容積調整手段增大上述燃燒室容稹而減少壓縮比，避 免爆震，能實行靜肅之運轉。 如此，在本發明，一面避免爆震一面擴犬活性熱氣氛 燃燒領域，能改善燃燒與抑制未燃燒碳化氫排出。 〔發明之實施形態〕 以下，說明圖示於第1〜2圖的本發明之一實施形態 0 « 本發明的具備燃燒控制裝置之火花點火式二衝程內燃 機1 ，係裝載於未予圖示的機車者，在該火花點火式二衝 程內燃機1 ，氣缸體3及缸頭4依次重叠於曲柄箱2之上 方而互相一體地結合，無負載運轉時之節流閥開度與內燃 機轉速，係具有如圖示於第5 ，6圇之Z曲線的特性。 又，在形成於氣缸體3之缸孔5向上下滑動自如地嵌 裝有活塞6 ，該活塞6與曲柄軸8係藉由連結桿7互相地 連結，隨著活塞6之昇降，曲柄軸8成爲旋轉驅動之狀態 0 又，形成有相連通於曲柄箱2內之曲柄室9的吸氣通 路1 0 ，該吸氣通路1 Q串聯地介裝有未予圖示之氣化器 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） =_ (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部中央標準局貝工消費合作社印製 經濟部中央標準局員工消費合作社印掣 S11968 A7 ____B7 五、發明説明（4 ) 與導程閥1 1 ，驅氣口 1 2開口於缸孔5之內周·面，而且 排氣口 1 3開口於此該驅氣口 1 2更上方位置，該驅氣口 1 2係經由驅氣通路1 4連通於曲柄室9，而且排氣口 1 3係連通於排氣通路1 5 v 在缸孔5上方之燃燒室1 6的頂部設有火星塞1 7， 藉由未予圖示之氣化器與燃料混合的新鮮氣體，係在上昇 衝程經由導程閥1 1被吸入成爲負壓之曲柄室9內，而在 下降衝程被壓縮，而且活塞6下降，驅氣口]^2被開放時 ，壓縮新鮮氣體由驅氣通路1 4供應於燃燒室1 6內，因 該壓縮.新鮮氣體之進入，燃燒室1 6內之已經燃燒氣體的 一部分，係由排氣口 1 3排出至排氣通路1 5內，藉由活 塞6之上昇，關閉驅氣口 1 2之後再關閉排氣口 1 3時， 則燃燒室16內之混合氣體係以活塞6之上昇被壓縮，而 在上死點近旁，成爲實行依上一循環殘留氣體之熱能量所 產生的自動點火。 又，鄰接於點火塞1 7·而連通於燃燒室1 6之圓筒形 凹部1 8形成於缸頭4 ，旋轉閥體1 9旋轉自如地嵌裝於 該圓筒形凹部1 8，在該旋轉閥體1 9形成有凹部2 0 ， 該旋轉閥體1 9係經由未予圖示之桿連結於電磁開關之活 動片（未予圖示），設有分別檢測火花點火式二衝程內燃 機1之轉速與未予圖示的節流閥之開度的察覺器（未予圖 示），而且設有接收這些兩檢測信號而實行如下述之動作 的電腦，如第7圖所示，火花點火式二衝程內燃機1之轉 速爲未滿5 0 0 0旋轉且節流閥開度未滿8 %之運轉領域 本紙張尺度適用中國國家標準（CNS > A4規格（210X 297公釐） (請先閱讀背面之注意事項再填寫本頁) *11 線 經濟部中央標準局員工消費合作社印製 311968 A? ____ B7 五、發明説明（5 ) A時，上述電磁開關係被導通，如第2圖所示，·旋轉閥體 1 9之凹部2 0係被密封，對於燃燒室1 6被遮斷，燃燒 室1 6之容積被縮小，燃燒室1 6之虛表壓縮比設成約8 ，又，在第7圖之運轉領域A以外之運轉領域B時，上述· 電磁開關係未導通，如第1圖所示，旋轉閥體19之凹部 2 0係經由開口 2 1相連通於燃燒室1 6 ，燃燒室1 6之 容積被擴大，形成燃燒室1 6之虛表壓縮比設成約6。 在上述火花點火式二衝程內燃機1，旋轉閥體19之 凹部2 0經由開口 2 1相連通於燃燒室1 6 ，虛表壓縮比 設成約.6時，活性熱氣氛燃燒領域X係圖示於第5圖之範 圍內，而旋轉閥體1 9之凹部2 0對於燃燒室1 6被遮斷 ，虛表壓縮比設成約8時，活性熱氣氛燃燒領域Y係成爲 如放大於第6圖之特性。 而且在火花點火式二衝程內燃機1之運轉狀態中，遮 斷點火開關時，則排氣控制閥2 4向上方開放，又，上述 電磁開關被斷開，燃燒室16之虛表壓縮比設成6 ，或節 流閥比空轉節流閥開度5 %更被節流。 在排氣通路1 5之上方，形成有閥體收容凹部2 2 ， 藉由與曲柄軸8平行地貫穿氣缸體3之軸2 3 ，排氣控制 閥2 4之基部向上下搖動自如地樞裝於該閥體收容凹部 2 2之下游側。 在排氣控制閥2 4之前端部形成有沿著該排氣控制閥 2 4之扁平面的扁平長孔2 5 ，以與曲柄軸8平行之軸爲 中心旋轉自如地嵌裝有旋轉體2 6於上述排氣通路1 5之 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） — ·.----·----< ------,訂------^ , - - (請先閲讀背面之注意事項再填寫本頁) 經济部中央標準局員工消費合作社印製 A7 ______B7__ 五、發明説明（6) 兩個1，自由嵌裝於排氣控制閥2 4之扁平長孔2* 5.的連結 軸2 7之兩端'偏心一體地嵌裝於上述兩旋轉體2 6。 而且旋轉體2 6係連結於檢測曲柄軸8之旋轉速度施 動作之未予圖示之調速器，在曲柄軸8之旋轉速度低之· 狀態下，如第2圖所示，排氣控制閥2 4係向下方搖動， 而在曲柄軸8之旋轉速度高之狀態下，旋轉體2 6係向反 時鐘方向旋轉，如第1圖所示，排氣控制閥.2 4係形成向 上方搖動（又，不依照調速器來控制旋轉體2T6 ，而接收 曲柄軸8之旋轉速度，節流閥開度，供氣壓力等之輸入信 號而依.據所需之控制圖計算C P U之控制信號所控制之排 氣控制伺服馬達來旋轉控制旋轉體2 6也可以）。 因圖示於第1圖〜第2圖之實施形態係構成如上述， 因此實行如下之動作。 亦即，因起動時爲無負載運轉狀態，因此打開未予圖 示之節流閥，隨著增大其開度，沿著第5圖，第6圖之Z 曲線增大內燃機轉速，惟因該節流閥之開度係未滿8 %， 因此，引擎轉速未滿5 0 0 0旋轉，旋轉閥體1 9之凹部 2 0對於燃燒室1 6被遮斷，而且因排氣控制閥2 4向下 方傾斜，故藉由燃燒室1 6之容積縮小，虛表壓縮比被轉 換成8 ，而且提早活塞6之上昇衝程的排氣口 1 3之關閉 開始時期，同時提早活塞6之下降衝程的排氣口 1 .3之開 放開始時期，結果，即使燃燒室1 6爲低溫，則以依高壓 縮比之大隔熱壓縮，新鮮氣體充分地高溫被加熱，因而促 進活性熱氣氛燃燒，抑制未燃燒碳化氫之排出’，而且改善 本紙張丈度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁)S11968 a printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. ___B7___ V. Description of the invention (!) [Technical Field of the Institute of Invention] '· The present invention relates to a fresh gas in the combustion chamber at least during low-load operation Auto-ignition combustion, that is, spark-ignition two-stroke internal combustion engine with combustion control device capable of burning in active hot atmosphere. [Conventional technology] In the conventional spark ignition type two-stroke internal combustion engine, an exhaust passage and a purge path that are opened and closed by the piston are formed on the inner peripheral surface of the cylinder bore, and the pre-compressed fresh gas in the crank chamber v The purge passage is supplied to the combustion chamber at the top of the cylinder bore. And the burned gas in the combustion chamber is discharged from the scavenging passage to the exhaust passage, and the fresh gas compressed in the combustion chamber is ignited by the spark plug. . In such a conventional spark ignition type two-stroke internal combustion engine, the amount of unburned hydrocarbons in the exhaust gas is increased to deteriorate the combustion. In order to solve this problem, the pressure in the combustion chamber when the exhaust opening generated by the piston is closed is developed to activate the fresh gas in the combustion chamber by the thermal energy of the burned gas remaining in the combustion chamber In the ideal ignition period of the operation of the internal combustion engine, the internal combustion engine that can ignite the fresh gas in the combustion chamber with automatic ignition has been filed by the applicant of this case (Japanese Patent Gazette No. 7-7 1 2 7 9). [Problem to be solved] In the above spark ignition type two-stroke internal combustion engine equipped with a combustion control device, for example, in the idling operation field, in the state where the throttle valve opening degree is small, even if the paper size is reduced to the Chinese National Standard (CNS) Α4 specification (210X 297mm) (Please read the precautions on the back before filling out this page), -β line A7 ____B7_ printed by the Employee Consumer Cooperative of the Central Prototype Bureau of the Ministry of Economy V. Invention description (2) Flow exhaust control valve, at In the last cycle, the amount of burned gas burned in the combustion chamber was increased to increase the temperature of the burned gas. If the fresh gas is automatically ignited, when the throttle valve is throttled, the combustion supply will also correspond to this. Reduced, including the fresh gas remaining in the combustion chamber that has burned gas cannot reach the auto-ignition temperature, so the fresh gas may not be automatically ignited. In order to improve this problem, when the stroke volume is kept constant, if the volume of the combustion chamber is reduced, the compression ratio is increased, and the temperature of the combustion chamber near the top dead center is increased, knocking is likely to occur in the high-load operation state. (Knock i. Ng), so it is not practical. [Means and effects used to solve the problem] The present invention relates to an improvement of a spark ignition two-stroke internal combustion engine equipped with a combustion control device that overcomes these difficulties, and belongs to at least the throttle valve opening with the engine speed to drive the exhaust The control valve to control the inlet-port of the exhaust passage or the opening area of the passage in the exhaust passage, at least during low-load operation, by auto-igniting the fresh gas in the combustion chamber, a spark ignition type two-stroke internal combustion engine with a combustion control device It is characterized by having a combustion chamber volume adjustment means that increases or decreases the volume of the combustion chamber in accordance with the operating status of the internal combustion engine. Since the present invention is structured as described above, when the throttle valve is throttled at a low-load operation with a reduced air supply amount and a combustion supply amount, in particular, during idling operation, the combustion chamber volume adjustment means is used to reduce the combustion The volume of the chamber, by increasing the compression ratio, including the residue in the combustion chamber has been burned. The gas paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (please read the notes on the back before reading (Fill in this page) Order A7 B7 311968 V. Description of the invention (3) The fresh gas in the body is swiftly insulated and compressed. As a result, the fresh gas in the combustion chamber is automatically ignited and can be burned in an active hot atmosphere. Combustion of hydrocarbon emissions, and improve combustion. Furthermore, in the present invention, in the general operating state with the throttle valve open, especially in the high-load low-speed operating state where knocking is likely to occur, the combustion chamber volume adjustment means increases the combustion chamber volume to reduce the compression ratio. , To avoid knocking, to be able to carry out quiet operation. As such, in the present invention, while avoiding knocking, the active thermal atmosphere is expanded in the combustion field, which can improve combustion and suppress the discharge of unburned hydrocarbons. [Embodiment of the invention] Hereinafter, one embodiment of the invention shown in FIGS. 1 to 2 will be described. 0 «The spark ignition type two-stroke internal combustion engine 1 with a combustion control device of the present invention is mounted on a non-illustrated For locomotives, in this spark-ignited two-stroke internal combustion engine 1, the cylinder block 3 and the cylinder head 4 are sequentially overlaid on the crankcase 2 to be integrated with each other. The throttle opening during no-load operation and the engine speed are As shown in the figure, the characteristics of the Z curve of the 5th, 6mm. In addition, a piston 6 is slidably inserted into the cylinder hole 5 formed in the cylinder block 3, the piston 6 and the crank shaft 8 are connected to each other by a connecting rod 7, and as the piston 6 moves up and down, the crank shaft 8 It is in the state of rotation driving. In addition, an intake passage 1 0 communicating with the crank chamber 9 in the crank case 2 is formed. The intake passage 1 Q is provided with a gasifier (not shown) in paper size connected in series. Applicable to China National Standard (CNS) A4 specification (210X 297mm) = _ (please read the notes on the back before filling in this page) Order the Ministry of Economic Affairs Central Standards Bureau Beigong Consumer Cooperative Printed by the Ministry of Economic Affairs Central Standards Bureau Staff Consumer Cooperative Imprint S11968 A7 ____B7 5. Description of the invention (4) With the pilot valve 1 1, the exhaust port 1 2 opens on the inner periphery of the cylinder bore 5, and the exhaust port 1 3 opens here above the exhaust port 1 2 The exhaust port 12 is connected to the crank chamber 9 through the exhaust channel 14 and the exhaust port 13 is connected to the exhaust channel 15 v. The top of the combustion chamber 16 above the cylinder hole 5 is provided with Mars Plug 17, fresh gas mixed with fuel by a gasifier not shown in the The ascending stroke is sucked into the crank chamber 9 of negative pressure through the pilot valve 11, and is compressed during the descending stroke, and the piston 6 is lowered, and the purge port] ^ 2 is opened, compressed fresh gas is supplied from the purge passage 14 In the combustion chamber 16, due to the compression. Fresh gas enters, part of the burned gas in the combustion chamber 16 is discharged from the exhaust port 13 into the exhaust passage 15 by the rise of the piston 6 When the exhaust port 12 is closed and the exhaust port 13 is closed, the mixed gas system in the combustion chamber 16 is compressed by the rise of the piston 6, and near the top dead center, it becomes the heat of the residual gas according to the previous cycle. Automatic ignition by energy. Furthermore, a cylindrical recess 18 adjacent to the ignition plug 17 and communicating with the combustion chamber 16 is formed in the cylinder head 4, and a rotary valve body 19 is rotatably fitted in the cylindrical recess 18. The rotary valve body 19 is formed with a concave portion 20. The rotary valve body 19 is connected to a movable piece (not shown) of an electromagnetic switch via a rod (not shown). The speed and the opening of the throttle valve not shown (not shown), and equipped with a computer that receives these two detection signals and performs the following actions, as shown in Figure 7, spark ignition The operation speed of the two-stroke internal combustion engine 1 is less than 50000 rotation and the throttle opening is less than 8%. The paper size is applicable to the Chinese national standard (CNS & A4 specifications (210X 297 mm) (please first Read the precautions on the back and fill in this page) * 11 311968 A printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs? ____ B7 V. Invention description (5) At A, the above-mentioned electromagnetic opening relationship is turned on, as shown in Figure 2 Shown that, the concave portion 20 of the rotary valve body 19 is sealed, and the combustion chamber 16 The volume of the combustion chamber 16 is reduced, and the virtual table compression ratio of the combustion chamber 16 is set to about 8. In the operation area B other than the operation area A in FIG. 7, the above-mentioned electromagnetic open relationship is not conducted. As shown in FIG. 1, the concave portion 20 of the rotary valve body 19 communicates with the combustion chamber 16 through the opening 21, the volume of the combustion chamber 16 is enlarged, and the compression ratio of the virtual table forming the combustion chamber 16 is set to About 6. In the above spark ignition type two-stroke internal combustion engine 1, the concave portion 20 of the rotary valve body 19 communicates with the combustion chamber 16 through the opening 21, and when the virtual table compression ratio is set to about 0.6, the active hot atmosphere combustion area X It is shown in the range of Fig. 5, and the concave portion 20 of the rotary valve body 19 is blocked from the combustion chamber 16 and the virtual table compression ratio is set to about 8, the active thermal atmosphere combustion area Y becomes as enlarged The characteristics are shown in Fig. 6. Furthermore, when the ignition switch is interrupted in the operating state of the spark ignition two-stroke internal combustion engine 1, the exhaust control valve 24 is opened upward, and the electromagnetic switch is turned off, and the combustion chamber 16 The virtual table compression ratio is set to 6, or the throttle valve is more throttled than the idling throttle valve opening 5%. Above the exhaust passage 15 is formed a valve body accommodating recess 2 2. By penetrating the shaft 2 3 of the cylinder block 3 parallel to the crank shaft 8, the base of the exhaust control valve 24 4 is pivotally mounted up and down freely The valve body accommodates the downstream side of the recessed portion 2. A flat long hole 25 along the flat surface of the exhaust control valve 24 is formed on the front end of the exhaust control valve 24 to have an axis parallel to the crank shaft 8 The paper standard with the rotating body 26 embedded in the exhaust passage 15 above the center is rotatably applied to the Chinese National Standard (CNS) A4 specification (210X297mm) — · .---- · ---- < ------, Order ------ ^,--(please read the notes on the back before filling out this page) A7 ______B7__ printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of invention (6 ) Two 1, freely fitted into the flat elongated hole 2 * 5 of the exhaust control valve 24 4. Both ends of the connecting shaft 2 7 'are eccentrically fitted into the above two rotating bodies 26. In addition, the rotating body 26 is connected to an unillustrated governor that detects the rotation speed of the crankshaft 8. When the rotation speed of the crankshaft 8 is low, as shown in FIG. 2, the exhaust control The valve 24 is rocked downward, and in the state where the rotation speed of the crank shaft 8 is high, the rotating body 26 is rotated in the counterclockwise direction, as shown in FIG. 1, the exhaust control valve .24 is formed upward Shake (again, do not control the rotating body 2T6 according to the governor, but receive the input signals of the rotation speed of the crankshaft 8, throttle valve opening, air supply pressure, etc. according to the required control chart to calculate the CPU control The exhaust gas controlled by the signal controls the servo motor to rotate and control the rotating body 26). Since the embodiment shown in FIGS. 1 to 2 is configured as described above, the following operations are performed. That is to say, because it is in a no-load operating state when starting, the throttle valve (not shown) is opened. As the opening degree is increased, the engine speed is increased along the Z curve in Figures 5 and 6, but because The opening of the throttle valve is less than 8%, therefore, the engine speed is less than 50000 rotation, the concave portion 20 of the rotary valve body 19 is blocked from the combustion chamber 16 and due to the exhaust control valve 2 4 is inclined downward, so that the volume of the combustion chamber 16 is reduced, the compression ratio of the virtual table is converted to 8, and the closing start time of the exhaust port 13 of the ascending stroke of the piston 6 is advanced, and the descending stroke of the piston 6 is also advanced When the opening of the exhaust port 1.3 is started, as a result, even if the combustion chamber 16 is at a low temperature, it is compressed with a high thermal insulation according to a high compression ratio, and the fresh gas is sufficiently heated at a high temperature, thus promoting the combustion of the active hot atmosphere and suppressing The discharge of unburned hydrocarbons', and the improvement of this paper is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) (please read the precautions on the back before filling this page)
、ST 逮 經濟部中央標準局員工消費合作杜印袈 311963 A7 B7 五、發明説明（7 ) 燃燒。 · 又，在未予圖示之節流閥打開8 %以上之一般運轉狀 態，或高負載運轉狀態，或是引擎轉速超過5 0 0 0旋轉 之高速運轉狀態，如第1圖所示，排氣控制閥2 4向上方 傾斜，而且旋轉閥體1 9之凹部2 0係經由開口 2 1連通 於燃燒室1 6，而燃燒室16之容積被擴大，結果，延遲 活塞6之上昇衝程的排氣口13之關閉開始時期，同時， 提早活塞6之下降衝程的排氣口 1 3之開放睹始時期，而 且因以增大燃燒室1 6之容積，虛表壓縮比維持在低水準 ，故不.會產生爆震，圓滑地實行大量之氣體交換，可成.爲 靜肅且增大輸出。 如此在以往之二衝程內燃機，在節流閥開度節流成約 5 %之節流狀態的空轉設定點近旁，則在虛表壓縮比6之 二衝程內燃機無法實行活性熱氣氛燃燒，容易產生未燃燒 碳化氫排出較多之不規則燃燒之領域，在圖示於第1圖至 第2圖之實施形態，係如圖示於第2圖，關閉旋轉閥體 1 9而將虛表壓縮比增大，因活性熱氣氛燃燒領域從圖示 於第5圖之範圍擴大至圖示於第6圖之範圍，因此可實行 活性熱氣氛燃燒，除了改善燃燒，也能得到安定之運轉狀 態。 .在圖示於第1圖至第2圖之實施形態，設置複數個凹 部2 0之容積不相同之旋轉閥體1 9 ，藉選擇性地開閉這 些，可階段地變更虛表壓縮比。 在圖示於第1圖至第2圖之實施形態，藉由旋轉閥體 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閱讀背面之注意事項再填寫本頁) 訂 迫！ 10 經濟部中央樣準局員工消費合作社印製 A7 _B7__ 五、發明説明（8 ) 1 9之旋轉，實行燃燒室1 6之增減，惟如圖示’於第3圖 ，將與燃燒室1 6連通之凹部2 8形成於缸頭4，而將如 未予圖示之電磁開關藉由閥開閉驅動手段所開閉之關斷閥 3 0設於凹部2 8之開口 2 9也可以，在圖示於第3圖之 實施形態，’也能發揮與圖示於第1圖至第2圖之實施形態 同樣之效果。 又，如圖示於第4圖構成燃燒控制裝置也可以。 亦即，在缸頭4形成與缸孔5相連通之副缸孔31 ， 將副活塞3 2滑動自如地嵌裝於該副缸孔3 1 ，以蓋3 3 密閉該.副缸孔3 1之外端形成油壓室3 4 ，藉將壓油供應 ，排出於該油壓室3 4 ，增減副缸孔3 1之副室3 5之容 積，或增減燃燒室1 6之容積也可以，在該實施形態除了 可得到與上述實施形態同樣之效果之外可連續地變更虛表 壓縮比。 〔圖式之簡單說明〕 第1圖係表示本發明之一般運轉狀態的具備燃燒控制 裝置之火花點火式二衝程內燃機之一實施形的縱剖側面圖 0 第2圖係表示在第1圇之低負載’低速運轉狀態的縱 剖側面圖。 第3圖係表示其他之實施形態的要部縱剖側囬圖。 第4圖係表示另一之實施形態的要部縱剖側囬圖。 第5圖係表示在圖示於第1圖至第2圖之寅施形態的 I.------;--ί ·------訂------边- (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ29?公釐） 11 經濟部中央樣準局員工消費合作社印装 A7 B7 五、發明説明（9 ) 低負載，低速運轉狀態，開放旋轉閥時之活性熱’氣氛燃燒 頜域與一般燃燒領域之境界的特性圖。 第6圖係表示在圖示於第1圖至第2圖之實施形態， 閉塞旋轉閥時之活性熱氣氛燃燒領域與一般燃燒領域之境 界的特性圖。 第7圖係表示在圖示於第1圖.至第2圖之實施形態， 旋轉閥之轉換情況的控制圖。 ， 〔記號之說明〕 1.:火花點火式二衝程內燃機，2 :曲柄箱，3 :氣 缸體，4 :缸頭，5 :缸孔，6 :活塞，7 :連結桿，8 :曲柄軸，9 :曲柄室，1 〇 :吸氣通路，1 1 :導程閥 ，1 2 :驅氣口，1 3 :排氣口，i 4 :驅氣通路，1 5 :排氣通路，16 :燃燒室，17 :火星塞，18 :圓筒 形凹部’ 1 9 :旋轉閥體，2 0 :凹部，2 1 :開口， 2 2 :閥體收容凹部，2 3 :軸-，2 4 :排氣控制閥， 25 :扁平長孔，26 :旋轉體，27 :連結軸，28 : 凹部’ 2 9 :開口，3 〇 :關斷閘，3丄：副缸孔，3 2 :副活塞，3 3 :蓋，3 4 :油壓室，3 5 :副室。 本紙張尺度適用中DU家標準（CNS ) A4規格（2iQx297公廣） (請先閲讀背面之注意事項再填寫本頁) i: 12、 St catching the employee consumption cooperation of the Central Bureau of Standards of the Ministry of Economic Affairs Du Yinhua 311963 A7 B7 V. Description of the invention (7) Burning. · In the normal operating state where the throttle valve not shown is open by more than 8%, or the high-load operating state, or the high-speed operating state where the engine speed exceeds 50000 rotation, as shown in Figure 1, The gas control valve 24 is inclined upward, and the concave portion 20 of the rotary valve body 19 is communicated with the combustion chamber 16 through the opening 21, and the volume of the combustion chamber 16 is enlarged. As a result, the displacement of the piston 6 ascending stroke is delayed At the beginning of the closing of the port 13, at the same time, the opening of the exhaust port 13 of the piston 6's descending stroke is earlier, and because the volume of the combustion chamber 16 is increased, the virtual table compression ratio is maintained at a low level, so No. Detonation will occur, and a large amount of gas exchange will be carried out smoothly, which can become quiet and increase the output. In this way, in the conventional two-stroke internal combustion engine, near the idling set point where the throttle opening is throttled to about 5% of the throttle state, the active hot atmosphere combustion cannot be carried out in the two-stroke internal combustion engine with a virtual table compression ratio of 6 and it is easy to produce In the field of irregular combustion where a large amount of hydrocarbons are combusted, in the embodiment shown in FIGS. 1 to 2, as shown in FIG. 2, the rotary valve body 19 is closed to increase the compression ratio of the virtual table. Large, because the active thermal atmosphere combustion area is expanded from the range shown in Figure 5 to the range shown in Figure 6, the active hot atmosphere combustion can be carried out, in addition to improving combustion, stable operating conditions can also be obtained. In the embodiment shown in Figs. 1 to 2, a plurality of rotary valve bodies 19 having different volumes of concave portions 20 are provided, and by selectively opening and closing these, the compression ratio of the virtual table can be changed in stages. In the embodiment shown in Figure 1 to Figure 2, by rotating the valve body, the paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the precautions on the back before filling this page) Book it! 10 A7 _B7__ printed by the Employees ’Consumer Cooperative of the Central Bureau of Samples and Economics of the Ministry of Economic Affairs V. Description of the invention (8) 1 9 The rotation of the combustion chamber 16 is implemented, but as shown in the figure 3, it will be linked to the combustion chamber 1 6 A concave portion 28 communicating is formed in the cylinder head 4, and a shut-off valve 30 which is opened and closed by a valve opening and closing driving means by an electromagnetic switch as not shown in the figure may be provided in the opening 2 9 of the concave portion 28. The embodiment shown in FIG. 3 also has the same effect as the embodiment shown in FIGS. 1 to 2. In addition, as shown in FIG. 4, the combustion control device may be configured. That is, a sub-cylinder hole 31 communicating with the cylinder hole 5 is formed in the cylinder head 4, the sub-piston 32 is slidably fitted into the sub-cylinder hole 3 1, and the sub-cylinder hole 3 1 is sealed with a cover 3 3. An oil pressure chamber 3 4 is formed at the outer end, and by supplying the pressurized oil to the oil pressure chamber 3 4, the volume of the auxiliary chamber 35 of the auxiliary cylinder bore 31 is increased or decreased, or the volume of the combustion chamber 16 is increased or decreased. It is possible that in this embodiment, the virtual table compression ratio can be continuously changed except that the same effect as the above-mentioned embodiment can be obtained. [Brief Description of Drawings] FIG. 1 is a longitudinal sectional side view showing one embodiment of a spark ignition type two-stroke internal combustion engine equipped with a combustion control device in the general operating state of the present invention. FIG. 2 is shown in the first wall. Longitudinal cross-sectional side view of low load 'low speed operation. Fig. 3 is a longitudinal sectional side view showing the main part of another embodiment. Fig. 4 is a longitudinal sectional side view showing the main part of another embodiment. Figure 5 shows I in the form of Yinshi shown in Figure 1 to Figure 2. Please read the precautions on the back before filling in this page) This paper standard is applicable to the Chinese National Standard (CNS) Α4 specification (210Χ29? Mm) 11 A7 B7 printed by the Consumer Consumer Cooperative of the Central Bureau of Samples of the Ministry of Economy V. Invention description (9 ) Low load, low speed operating state, the characteristic diagram of the state of the active heat 'atmosphere burning jaw domain and general combustion domain when the rotary valve is opened. Fig. 6 is a characteristic diagram showing the boundary between the active thermal atmosphere combustion field and the general combustion field when the rotary valve is closed in the embodiment shown in Figs. 1 to 2; Fig. 7 is a control diagram showing the switching state of the rotary valve in the embodiment shown in Figs. 1 to 2; , [Description of Symbols] 1 .: Spark ignition two-stroke internal combustion engine, 2: crankcase, 3: cylinder block, 4: cylinder head, 5: cylinder bore, 6: piston, 7: connecting rod, 8: crankshaft, 9: crank chamber, 1 〇: intake passage, 1 1: pilot valve, 12: purge port, 1 3: exhaust port, i 4: purge passage, 1 5: exhaust passage, 16: combustion chamber , 17: spark plug, 18: cylindrical recessed portion 1 1 9: rotating valve body, 2 0: recessed portion, 2 1: opening, 2 2: valve body receiving recessed portion, 2 3: shaft-, 2 4: exhaust control Valve, 25: flat long hole, 26: rotating body, 27: connecting shaft, 28: recessed portion 2 2: opening, 3 〇: shut-off gate, 3 °: auxiliary cylinder hole, 3 2: auxiliary piston, 3 3: Cover, 3 4: hydraulic chamber, 3 5: auxiliary chamber. The paper size is applicable to the DU standard (CNS) A4 specification (2iQx297 public broadcasting) (please read the precautions on the back before filling this page) i: 12