1299379 (1) 九、發明說明 【發明所屬之技術領域】 本發明是關於安裝在消音器之排廢氣淨化裝置。 【先前技術】 過去以來，已知有讓載持有觸媒之冲孔金屬等所組成 的筒狀體收納在消音器內之排廢氣淨化裝置（例如：參照 Φ 曰本專利文獻1 )。 〈專利文獻1 > 日本特開2004 - 1 503 1 0號公報 上述公報所記載的技術，如該公報中的第1圖所示， 內燃機的排氣裝置E (沿用公報中的符號，以下皆是）， 具備有：裝設在第1排氣管1與第2排氣管2之間，而具 有配置在排氣消音器4內的觸媒部3 0之排氣淨化裝置3。 排氣淨化裝置3具有形成流出淨化後的排廢氣的出口路3 6 之出口部34。出口部33具有構成漸縮部之錐形管39，在 # 錐形管39的上游側部39c，設有使流過出口部34之排廢 氣的一部分流出之排泄孔7。 以上的昔日技術，設置在漸縮部之排泄孔，設置在消 音器內從與排氣管連接的連接管隔有距離的接近中游〜下 游的部位之中間的室內，且在不與觸媒體重疊的位置設有 排泄孔。 然則，要取得引擎的輸出目標的情況，輸出特性則要 以該排泄孔來調整，不過昔日技術，因對排泄孔的位置有 限制，所以無法精密的調整，因而輸出特性大多是依據排 -4- (2) 1299379 氣管長度，而造成設計自由度有所限制。 另外，昔日技術的如同第1圖，在消音器的中央部配 置有觸媒體，則淨化性能這點稱不上是最佳狀況；另外， 如同第4圖在於具備複數個容室之消音器的在下游側的容 室，使排泄孔穿孔，因而必須另外採取消音對策。 本發明是將裝設收納在以上昔日的消音器內之排氣淨 化裝置加以改良。 【發明內容】 <發明所欲解決之課題> 本發明是提供當筒狀體所組成的觸媒筒狀體收納裝設 在消音器內而形成排氣淨化裝置的時候，引擎的輸出調整 設成不單是依據管長仍能進行調整，且能達到提高排氣效 能之排廢氣淨化裝置。 Φ <用以解決課題之手段> 本發明的申請專利範圍第1項，是一種將用載持有觸 媒之多孔板所形成之觸媒筒狀體收納在備有複數個膨脹室 之消音器內而形成之排廢氣淨化裝置，其特徵爲：前述觸 媒筒狀體配置在引擎側的與排氣管連接的連接管最接近的 膨脹室，也就是配置在排氣氣流最上游的膨脹室，以外筒 覆蓋前述觸媒筒狀體的外周，在該外筒設有前後方向離有 間隔，且前後方向與觸媒筒狀體相重疊之排泄孔，藉由該 排泄孔使通.過觸媒筒狀體圓周之排氣的一部分排泄到前述 -5- (3) 1299379 膨脹室。 本發明的申請專利範圍第2項，如同申請專利範圍第 1項，其中：設置在前述外筒之複數個排泄孔，各別設置 在前述筒狀體的前半部及後半部。 本發明的申請專利範圍第3項，如同申請專利範圍第 2項，其中··在前述觸媒筒狀體與外筒的間隙中具有壁體 ’前述複數個排泄孔各別設置在該壁體的前後。 ® 本發明的申請專利範圍第4項，如同申請專利範圍第 3項，其中：前述壁體設置在觸媒筒狀體的中央，前述複 數個排泄孔則是配置成與該壁體的前後都同等距離。 【實施方式】 以下，根據圖面說明本發明的實施形態。然而，「前 」、「後」、「左」、「右」、「上」、「下」是根據駕 駿者所看的方向，F r表示前側，R r表示後側，L表示左側 ’ R表示右側。另外，圖面係朝圖號的方向來看。 第1圖爲適用本發明之機車爲例之左側面圖。 以此圖來槪略說明機車。 機車210是一種主要結構包括有車體骨架211、及安 裝在車體骨架211的頭管211a之前叉212、及安裝在前叉 212之前輪213、及與前叉212連結之方向把手214、及可 上下擺動地安裝在車體骨架211的後部之動力單元215、 及安裝在動力單元2 1 5之後輪2 1 6、及懸掛動力單元2 1 5 的後端部之後壁震器單元217、及安裝在車體骨架211的 -6- (4) 1299379 後部上部之收納箱2 1 8、及配置在收納箱2 1 8的 裝成可開關之座椅219之速克達型機車。 動力單元215是由前部的水冷式引擎221及 力傳達機構222所組成。引擎22 1則是將汽缸蓋 而大致成水平來配置。 再則，機車210是以車體蓋230覆蓋車體骨 車體蓋230則由覆蓋頭管211a的前部之前蓋23 1 • 駕駛者的腳部前方之遮腳板232、及承載駕駿者 腳板（凹槽式擱腳板）233、及從擱腳板23 3的 方延伸之左右的擱腳板側蓋2 3 4、及覆蓋擱腳板 的下緣間之下蓋23 5、及覆蓋前述收納箱218的 圍之座椅下部蓋236、及覆蓋收納箱218的後半 及車體後部之後蓋23 7、及從座椅下部蓋23 6 23 7往下方延伸之左右的側蓋23 8所組成。 以上的機車2 1 0是在遮腳板2 3 2的部位配置 • 241，在擱腳板23 3的下面配置燃料箱242以及 243，在車體骨架21 1當中後部骨架290的上部 219，在該座椅219的後方且在後部骨架29 0的 備用槽244以及機電品（電池245以及控制單元 備用槽244爲儲存引擎冷卻用散熱器265的冷卻ί 圖中，圖號251爲方向把手握把，圖號252 把，圖號25 3爲碼表，圖號254爲照後鏡，圖號 向燈，圖號256F爲方向把手前蓋、圖號256R爲 後蓋，圖號257爲頭燈，圖號25 8爲喇叭，圖號 上面且安 後部的動 朝向前方 架 211。 、及覆蓋 的腳之擱 外緣往下 側蓋234 前半部周 部周圍以 以及後蓋 點火鎖筒 燃料幫浦 配置座椅 後部配置 ;246)。 液之槽。 爲煞車握 25 5爲方 方向把手 259爲前 (5) 1299379 擋泥板，圖號261爲動力單元安裝用吊架，圖號262爲引 擎起動用踏板，圖號2 6 3爲空氣濾清器’圖號2 6 4爲化油 器，圖號265爲引擎冷卻用散熱器，圖號266爲引擎用排 氣管，圖號271爲停車架，圖號272爲後擋泥板，圖號 273爲尾燈，圖號274爲方向燈，圖號275爲載物架，He 爲安全帽。 消音器1朝前後方向配置在車輪的右側方，且與引擎 鲁用排氣管2 6 6相連接。 第2圖爲收納本發明的排氣裝置的消音器之縱向側面 圖。 圖號1表示消音器，圖的左側爲前方（引擎側）。 消音器1的本體系由圓筒形的筒狀外殼體2所構成， 筒狀外殼體2係在外側筒體2 a與以冲孔金屬等所形成的 內側筒體2b之間充塡裝入吸音材3而形成，筒狀外殻體2 的前後端部則用前端板4、後端板5來封閉。 ^ 前後的端部用前端板4、後端板5封閉之筒狀外殼體 2內’用裝設在內側筒體2b的前後之隔板6、7來區隔， 而區隔成第1膨脹室8、第2膨張室9、第3膨脹室1 〇。 即端板4係如第1圖和第2圖所示，形成爲偏向一側 方且偏向下方之漏斗狀。在該漏斗狀的開口部4a接合引 擎側之與排氣管連結的連接管1 1，連接管丨1的前半部 1 1 a往則端板4的則方突出’後半部1丨^面臨前端板4的 背面側之第1膨脹室8的前部內。 將桌1 脹室8與桌2知膜室9區隔之第丨隔板6， -8- (6) 1299379 貫穿直徑大於連接管1 1之外筒的後部來裝設。外筒1 2的 大部分面臨第1膨脹室8內來裝設。 外筒1 2的前部1 2a與連接管1 1的後端部1 1 c之間， 用前部直徑小而直到後部呈喇叭狀擴張直徑之漏斗狀的連 接筒1 3來接合，面臨第2膨脹室9內的後部12b，將與前 述連接筒1 3成對稱的形狀之漏斗狀的連接筒1 4之擴張直 徑前部14a接合。 # 外筒1 2的內部，收納裝設有同心且直徑更小的觸媒 筒狀體1 5 (以下簡稱爲筒狀體）。 筒狀體1 5是將載持有觸媒之冲孔金屬（多孔板）捲 成筒狀而形成，夾裝在前後的連接筒1 3、1 4的端緣間。 筒狀體1 5以前後封閉之較短的筒構件1 6來包覆前後 方中央部而加以保持，筒構件1 6則以熔接1 6 a接合支撐 在外筒12的內周部，筒構件16及筒狀體1 5的外周是朝 複數個圓周方向以等間隔熔接16a多數處來接合支撐其中 ® 央部，該間隙中則充塡夾裝有不銹鋼纖維16b。 以該不銹鋼纖維1 6 b保持熔接的前後故能減小熔接寬 度’所以即使是fel狀體1 5熱膨膜仍能維持支撐。藉由該 不銹鋼纖維1 6 b ’外筒1 2與筒狀體1 5間的間隙被分隔成 前後。 因此’筒構件1 6的作用是作爲將外筒1 2與筒狀體j 5 間的間隙分隔成前後之壁體。 裝設在以上的外筒1 2內之筒狀體丨5，由讓觸媒載持 之多孔板所組成’與上游的排氣連接管1 1相連通，排氣 -9- (7) 1299379 通過筒狀體1 5內及該外側的外筒1 2內’流到下游’經過 此該過程排氣通過筒狀體1 5 ’並將排廢氣淨化’而構成排 氣淨化裝置。 在以上之外筒1 2的一部分穿透設有排氣排泄孔1 7、 1 7。排泄孔1 7、1 7在於本實施形態則是在下側設有2個 ，與外筒1 2外側的第1膨脹室8相連通。 排泄孔1 7的數量沒有限制，口徑也沒有限制’排泄 φ 孔17、17的配置位置設在壁體16的前後，壁體16則設 在筒狀體1 5前後的中央部，排泄孔設成與壁體1 6的前後 都同等距離。 本實施形態，由於加工的容易度及測試上的輸出特性 有良好的結果，因而排泄孔設爲在壁體的前後且隔離有外 筒長度的1/4間隔位置。 以上的觸媒筒狀體1 5、外筒1 2以及設在該外筒處之 排泄孔1 7，與連接在引擎的排氣管之排氣連接管1 1最接 • 近，在複數個（本實施形態爲3個）膨脹室的最上游部的 第1膨脹室8內（排氣流最上游的膨脹室）設置開口。 以連接到面臨第2膨脹室9內之外筒12的後部12b 之連接筒1 4的小口徑後部1 4b平面上看大致呈現的U形 狀，連接側面看大致呈現的U形狀的長邊之第1連通管 1 8的前端部18&(上游端部），連通管18其上游直線部 1 8b將第2膨脹室9內往後方延伸出，貫穿第2隔板部7 而面臨第3膨脹室1 0內。 第1連通管1 8的U形狀部1 8c面臨第3膨脹室10內 -10- (8) 1299379 向前方作u形迴轉，連接在U形狀部1 8c的下游部之中游 直線部1 8d貫穿第2隔板7而面臨第2膨脹室9內。 第1連通管18的下游直線部18e貫穿第1隔板6，而 開口端1 8f爲在第1膨脹室8的前半部開口。 在第1膨脹室8內，裝設有被區隔的連接管11、內設 載持有觸媒的筒狀體1 5且利用該膨脹室8及排泄孔1 7、 17來連通之外筒12，與排廢氣淨化裝置相連通之連通管 φ 1 8的下游端部在該膨脹室8開口。 第1膨脹室8與第2膨脹室9利用貫穿第1隔板6所 設置之較短的第2連通管19來連通連接；第2膨脹室9 與第3膨脹室10則利用貫穿第2隔板7所設置之較短的 第3連通管20來連通連接。 從外部將第3膨脹室1 0封閉之後端部板5爲向後方 彎曲隆出的形狀，在下部設有安裝孔5 a，以貫穿尾管2 1 的方式接合到該安裝孔，而將第3膨脹室1 〇與外氣連通 _連接。 尾管2 1的後部2 1 b向後方突出，中間部〜前半部2 1 a 面臨第3膨脹室10內。 以上，引擎的排廢氣，從連接管1 1穿過筒狀體1 5內 依照箭頭方向流到連通管1 8。 另外，筒狀體1 5由多孔板所形成，因具有多數個孔 ，所以排廢氣逐一穿過筒狀體1 5內，一部分依照箭頭方 向排泄到與外筒12之間的間隙S。間隙S因有壁體ι6區 隔著，所以從排泄孔1 7排泄到第1膨脹室8內。 -11 - (9) 1299379 在壁體1 6下游的間隙s 1，從多孔板的孔排泄出一部 分的排廢氣’從間隙S 1藉由壁體1 6下游的排泄孔1 7依 照箭頭方向排泄到第1膨脹室8內。 經過該過程’排廢氣接觸到筒狀體1 5的內外周而著 火燃燒，載持有觸媒之筒狀體1 5配置在消音器1內的最 上游側，對於排廢氣的著火燃燒有良好效率，而提高排廢 氣的淨化性能。 φ 特別是觸媒配置在與排氣管連接的連接管最接近的膨 脹室8，也就是配置在排氣氣流最上游的膨脹室8，所以 形成爲觸媒配置在容易反應的位置，而能更加使淨化性能 提筒。 另外利用觸媒筒狀體1 5的上述配置，提高消音器1 內觸媒之配置位置的自由度，又因引擎的輸出也能依據排 泄孔的設定數量來進行調整，所以輸出容易調整。 然且，因觸媒筒狀體1 5以多孔板來形成，所以排廢 # 氣通過多孔而增加排廢氣的氣流，且提高排廢氣的淨化性 能。另外，因排泄孔裝設在上游側，所以不必採取消音對 策。 第3圖爲裝設了本發明的排廢氣淨化裝置之其他實施 形態的消音器之橫剖平面圖。第4圖爲相同縱剖側面圖。 第5圖爲第4圖的5— 5線之剖面圖。第6圖爲第4圖的6 - 6線之剖面圖。以下，參照這些的圖面進行說明。 消音器1 0 1的本體與前述同樣由圓筒型的筒狀外殻體 102所構成，筒狀外殼體102係在外側筒體l〇2a與以冲孔 -12- (10) 1299379 金屬等所形成的內側筒體l〇2b之間充塡裝入吸音材l〇3 而形成，筒狀外殻體102的前後端部則用前端板104、後 端板1 〇 5來封閉。 前後的端部用前端板104、後端板105封閉之筒狀外 殻體102內，用裝設在內側筒體l〇2b的前後之隔板106、 107來區隔，而區隔成第1膨脹室108、第2膨脹室109、 第3膨脹室1 1 0。 前端板104係如第1圖和第2圖所示，形成爲偏向一 側方且偏向下方之漏斗狀。在該漏斗狀的開口部1 04a接 合引擎側之與排氣管連結的連接管i i i，連接管丨Γ1的前 半部1 1 1 a往前端板1 04的前方突出，後半部1 1 1 b面臨前 端板104的背面側之第1膨脹室108的前部內。 將第1膨脹室108與第2膨脹室109區隔之第1隔板 106，貫穿直徑大於連接管111之外筒112的後部112b來 裝設。外筒1 1 2的大部分面臨第1膨脹室1 08內來裝設。 外筒1 1 2的前部1 1 2a與連接管1 1 1的後端部1 1 1 c之 間，用前部直徑小而直到後部呈喇叭狀擴張直徑之漏斗Μ 的連接筒1 13來接合，面臨第2膨脹室109內的後部1 l2b ，將與前述連接筒1 1 3成對稱的形狀之漏斗狀的連接筒 1 14之擴張直徑前部1 14a予以接合。 外筒1 1 2的內部，收納裝設有同心且直徑更小的觸女某 筒狀體1 1 5。 筒狀體1 1 5是將載持有觸媒之冲孔金屬（多孔板）捲 成筒狀而形成，夾裝在前後的連接筒1 1 3、1 1 4的端緣間 -13- (11) 1299379 該筒狀體115，如第4圖所示，用呈對稱配置在外筒 1 1 2之軸方向中央部的內周之大致通道狀的一對連結架 116、116來接合外周的中央部116a，將筒狀115支撐在 外筒1 1 2內。 裝設在以上的外筒1 1 2內之筒狀體1 1 5，由載持有觸 媒之多孔板所形成，與上游的排氣連接管111相連通，排 φ 氣穿過筒狀體1 1 5內及在此筒狀體外側的外筒1 1 2內，流 到下游，經過該過程排氣通過筒狀體1 1 5被淨化，而構成 排氣淨化裝置。 在以上之外筒1 1 2的一部分穿透設有排氣排泄孔1 1 7 、1 1 7。排泄孔1 1 7、1 1 7如第2圖所示在下側設有2個， 將內筒構件的筒狀體Π 5與外筒1 1 2之間的空間S和外筒 112外側的第1膨脹室108相連通。 排泄孔1 1 7的數量沒有限制，口徑也沒有限制，排泄 # 孔1 1 7、1 1 7的配置位置設在離外筒1 1 2的兩端部各別都 有1 /4的位置。因此，設置在內筒的筒狀體1 5的軸方向 中心部往前後各別都離開有1 / 4間隔的位置。 以連接到面臨第2膨脹室1 09內之外筒1 1 2的後部 1 12b之連接筒1 14的小口徑之後部14b平面上看大致呈現 的U形狀，連接側面看大致呈現的U形狀的長邊之第1 連通管1 1 8的前端部1 1 8a (上游端部），連通管1 1 8的上 游直線部1 1 8 b是在第2膨張室1 0 9內往後方延伸出，貫 穿第2隔板部1 〇7而面臨第3膨脹室1 1 0內。 -14- (12) 1299379 .第1連通管1 18的U形狀部1 18c，面臨第3膨脹室 1 1 〇內而在前方U形回折，連接到U形狀部1 1 8 c的下游 部之中游直線部d，貫穿第2隔板107而面臨第2膨脹室 109 內。 第1連通管1 18的下游直線部1 18e貫穿第1隔板106 ，而開口端1 18f開口至第1膨脹室108的前半部。 在第1膨脹室1 〇 8內，裝設有被區隔的連接管1 1 1、 φ 內設載持有觸媒的筒狀體1 1 5且利用該膨脹室1 〇 8及排泄 孔1 1 7、1 1 7來連通之外筒1 1 2 ;與排廢氣淨化裝置相連通 之連通管118的下游端部開口至該膨脹室1〇8。 第1膨脹室10 8與第2膨脹室1 0 9利用貫穿第1隔板 1 06所設置之較短的第2連通管1 1 9來連通連接；第2膨 脹室1 09與第3膨脹室1 1 0則利用貫穿第2隔板1 〇7所設 置之較短的第3連通管120來連通連接。 從外部將第3膨脹室1 1 0封閉之後端部板〗05爲向後 • 方彎曲隆出的形狀，在下部設有安裝孔l〇5a，以將尾管 1 2 1貫穿該貫穿孔的方式接合，而將第3膨脹室〗丨〇與外 氣連通連接。 尾管121的後部121b向後方突出，中間部〜前半部 121a面臨第3膨脹室11〇內。 如同上述，觸媒筒狀體（筒狀體），與前述同樣配置 在引擎側的與排氣管連接的連接管最接近的膨脹室，也就 是配置在排氣氣流最上游的膨脹室，亦即是配置在第1膨 脹室1 〇 8內。 -15- (13) 1299379 第7圖爲表示內裝有本發明的排廢氣淨化裝置之消音 器的特性之圖形。 以粗虛線a表示的比較例1爲沒有在前述過的外筒1 2 設置排泄孔的構造，以細虛線b表示的比較例2爲備有1 個排泄孔，以實線c表示的實施例爲備有2個排泄孔。 由該圖形中能明白，引擎最大輸出之前後的迴轉速度 ，引擎輸出爲有1個排泄孔的b高於沒有排泄孔的a，而 • 有2個排泄孔的的實施例c則比比較例1更加提高輸出特 性就能理解。 然而，本發明舉出了在外筒設有2個排泄孔的例子， 不過排泄孔的數量並沒有限制。另外，排泄孔在於上述過 的實施形態則是設置在外筒的下側，不過也可以設置在周 方向的任何一個位置。 [發明之效果] 本發明的申請專利範圍第1項，因觸媒筒狀體配置在 引擎側的與排氣管連接的連接管最接近的膨脹室，也就是 配置在排氣氣流最上游的膨脹室，以外筒覆蓋前述觸媒筒 狀體的外周，在該外筒設有前後方向離有間隔’且前後方 向與觸媒筒狀體相重疊之排泄孔，所以提高消音器內觸媒 之配置位置的自由度，又因引擎的輸出也能依據排泄孔的 設定數量來進行調整，所以輸出容易調整。 另外，因觸媒筒狀體以多孔板來形成’所以排廢氣通 過多孔而增加排廢氣的氣流，且提排廢氣的淨化性能。另 -16- (14) 1299379 外，因排泄孔裝設在上游側，所以不必採取消音對策。 再則，觸媒配置在與排氣管連接的連接管最接近的膨 脹室，也就是配置在排氣氣流最上游的膨脹室，所以形成 爲觸媒配置在容易反應的位置，而能更加使淨化性能提高 〇 本發明的申請專利範圍第2項，如同申請專利範圍第 1項，其中：因將設置在前述外筒之複數個排泄孔，各別 # 設置在前述筒狀體的前半部及後半部，所以能有格外良好 效率進行引擎的輸出調整。 本發明的申請專利範圍第3項，如同申請專利範圍第 2項，其中：因在前述觸媒筒狀體與外筒的間隙中具有壁 體，複數個排泄孔各別設置在該壁體的前後，所以能一面 有效使用筒狀體前後的冲孔來達到前後排泄孔的效果，一 面確實支撐筒狀體的中央部。 本發明的申請專利範圍第4項，如同申請專利範圍第 # 2項，其中：因前述壁體設置在觸媒筒狀體的中央，複數 個排泄孔則是配置成與壁體的前後都同等距離，所以組裝 時不必識別前後就能組裝外筒。 [產業上利用的可能性] 本發明的排廢氣淨化裝置適合收納裝設在機車的消音 器內。 【圖式簡單說明】 -17- (15) 1299379 第1圖爲表示適用本發明之機車的例子之側面圖。 第2圖爲內裝有本發明的第1實施形態的排廢氣淨化 裝置之消音器之縱剖面側面圖。 第3圖爲內裝有本發明的第2實施形態的排廢氣淨化 裝置之消音器之橫剖面平面圖。 第4圖爲內裝有第3圖的排廢氣淨化裝置之消音器之 縱剖面側面圖。 第5圖爲第4圖中的5 — 5線之剖面圖。 第6圖爲第4圖中的6 — 6線之剖面圖。 第7圖爲表示內裝有本發明的排廢氣淨化裝置之消音 器的特性之圖形。 【主要元件符號說明】 1 :消音器 8、9、10 :膨脹室 Π :排氣連接管 1 2 :外筒 15 :筒狀體 16 :壁體 1 7 :排泄孔 -18-1299379 (1) Description of the Invention [Technical Field] The present invention relates to an exhaust gas purification device installed in a muffler. [Prior Art] In the past, an exhaust gas purifying device that accommodates a cylindrical body composed of a punching metal or the like holding a catalyst in a muffler has been known (for example, see Φ Patent Document 1). In the technique described in the above publication, as shown in the first figure of the publication, the exhaust device E of the internal combustion engine (the symbols in the bulletin are used, the following are all the following). In addition, the exhaust gas purification device 3 is provided between the first exhaust pipe 1 and the second exhaust pipe 2, and has a catalyst portion 30 disposed in the exhaust muffler 4. The exhaust gas purifying device 3 has an outlet portion 34 that forms an outlet path 36 that flows out of the purified exhaust gas. The outlet portion 33 has a tapered pipe 39 constituting a tapered portion, and the upstream side portion 39c of the #-conical pipe 39 is provided with a drain hole 7 through which a part of the exhaust gas flowing through the outlet portion 34 flows out. The above-mentioned prior art is provided in the drain hole of the tapered portion, and is disposed in the middle of the muffler from the middle of the middle to the downstream of the connecting pipe connected to the exhaust pipe, and does not overlap with the touch medium. The location has a drain hole. However, in order to obtain the output target of the engine, the output characteristics are adjusted by the drain hole. However, in the past technology, since the position of the drain hole is limited, it cannot be precisely adjusted, and thus the output characteristics are mostly based on the row-4. - (2) 1299379 The length of the trachea, which limits the freedom of design. Further, as in the first technique, as shown in Fig. 1, when the touch medium is disposed in the center portion of the muffler, the purification performance is not the best condition; and, as in Fig. 4, the muffler having a plurality of chambers is provided. In the chamber on the downstream side, the drain hole is perforated, so that a separate noise reduction countermeasure must be taken. The present invention is an improvement of an exhaust gas purifying device that is housed in the above-mentioned conventional muffler. [Problem to be Solved by the Invention] The present invention provides an output adjustment of an engine when a catalytic cylinder composed of a cylindrical body is housed in a muffler to form an exhaust gas purifying device. It is not only an exhaust gas purification device that can be adjusted according to the length of the pipe, but also can improve the exhaust efficiency. Φ < means for solving the problem> The first aspect of the patent application of the present invention is to store a catalyst cylinder formed by a porous plate carrying a catalyst in a plurality of expansion chambers. An exhaust gas purifying device formed in a muffler, wherein the catalytic cylinder is disposed in an expansion chamber closest to a connecting pipe connected to the exhaust pipe on the engine side, that is, disposed at the most upstream of the exhaust gas flow. In the expansion chamber, the outer cylinder covers the outer circumference of the catalytic cylinder, and the outer cylinder is provided with a drain hole which is spaced apart from each other in the front-rear direction and which overlaps with the catalyst cylinder in the front-rear direction, and is opened by the drain hole. A portion of the exhaust gas passing through the circumference of the catalyst cylinder is discharged to the aforementioned -5-(3) 1299379 expansion chamber. The second aspect of the patent application of the present invention is the first aspect of the patent application, wherein the plurality of drain holes provided in the outer cylinder are respectively disposed in the front half and the rear half of the cylindrical body. The third aspect of the patent application of the present invention is as in the second aspect of the patent application, wherein the wall has a wall body in the gap between the catalyst cylinder and the outer cylinder. The plurality of drain holes are respectively disposed in the wall body. Before and after. The fourth aspect of the patent application of the present invention is as in claim 3, wherein the wall body is disposed at the center of the catalyst cylinder, and the plurality of drain holes are disposed in front of and behind the wall body. The same distance. [Embodiment] Hereinafter, embodiments of the present invention will be described based on the drawings. However, "front", "back", "left", "right", "up" and "down" are based on the direction seen by the driver, F r is the front side, R r is the back side, and L is the left side. R represents the right side. In addition, the drawing is viewed in the direction of the figure number. Fig. 1 is a left side view showing an example of a locomotive to which the present invention is applied. Use this diagram to illustrate the locomotive. The locomotive 210 is a main structure including a vehicle body frame 211, a front fork 212 attached to the head pipe 211a of the vehicle body frame 211, a front wheel 213 mounted on the front fork 212, and a direction handle 214 coupled to the front fork 212, and a power unit 215 that is swingably mounted to the rear of the body frame 211, and a wall unit 217 that is mounted after the power unit 2 1 5 rear wheel 2 16 and the rear end portion of the suspension power unit 2 15 The storage box 2 1 8 attached to the upper rear portion of the -6- (4) 1299379 of the body frame 211, and the speed skating type locomotive that is disposed in the storage box 2 1 8 and mounted as the switchable seat 219. The power unit 215 is composed of a front water-cooled engine 221 and a force transmission mechanism 222. The engine 22 1 is disposed substantially horizontally with the cylinder head. Further, the locomotive 210 covers the body body cover 230 with the body cover 230, and covers the front cover 23 1 of the head tube 211a. • The cover plate 232 in front of the driver's foot and the loader's foot plate a (groove type footrest) 233, and a left and right footrest side cover 243 extending from the side of the footrest 23 3, and a lower cover 232 covering the lower edge of the footrest, and covering the storage box 218 The seat lower cover 236 and the rear half of the storage box 218 and the rear cover 23 7 of the vehicle body and the left and right side covers 23 8 extending downward from the seat lower cover 23 6 23 7 are formed. The above locomotive 210 is disposed at a portion of the footrest 233, and the fuel tanks 242 and 243 are disposed on the lower surface of the footrest 23 3, and the upper portion 219 of the rear skeleton 290 is in the vehicle body frame 21 1 . The rear of the chair 219 and the spare slot 244 of the rear frame 290 and the electromechanical product (the battery 245 and the control unit spare slot 244 are the cooling of the storage engine cooling radiator 265, the figure 251 is the direction handle grip, No. 252, the figure 25 3 is the code table, the picture number 254 is the rear mirror, the picture number is the light, the figure number 256F is the direction handle front cover, the figure number 256R is the back cover, the figure number 257 is the headlight, the figure number 25 8 is the horn, the movement on the top of the figure and the rear part is toward the front frame 211. The outer edge of the covered foot is the outer edge of the lower side cover 234 around the circumference of the front half and the rear cover ignition lock cylinder fuel pump is equipped with a seat. Rear configuration; 246). Liquid tank. For the brake grip 25 5 is the square direction handle 259 for the front (5) 1299379 fender, Figure 261 for the power unit mounting hanger, Figure 262 for the engine start pedal, Figure 2 6 3 for the air filter 'Figure No. 2 6 4 is a carburetor, Figure 265 is the engine cooling radiator, Figure 266 is the engine exhaust pipe, Figure 271 is the parking rack, Figure 272 is the rear fender, Figure No. 273 For the taillights, Figure 274 is the directional light, Figure 275 is the carrier, and He is the helmet. The muffler 1 is disposed on the right side of the wheel in the front-rear direction, and is connected to the engine exhaust pipe 266. Fig. 2 is a longitudinal side view of a muffler accommodating the exhaust device of the present invention. Figure 1 shows the silencer, and the left side of the figure is the front (engine side). The present system of the muffler 1 is composed of a cylindrical outer casing 2, and the cylindrical outer casing 2 is filled between the outer cylindrical body 2a and the inner cylindrical body 2b formed of punched metal or the like. The sound absorbing material 3 is formed, and the front and rear end portions of the cylindrical outer casing 2 are closed by the front end plate 4 and the rear end plate 5. ^ The front and rear end portions of the cylindrical outer casing 2 closed by the front end plate 4 and the rear end plate 5 are separated by the partitions 6, 7 provided in the front and rear of the inner cylindrical body 2b, and are partitioned into the first expansion. The chamber 8, the second expansion chamber 9, and the third expansion chamber 1 are. That is, as shown in Figs. 1 and 2, the end plate 4 is formed in a funnel shape which is biased to one side and downward. The funnel-shaped opening 4a is joined to the connecting pipe 1 1 connected to the exhaust pipe on the engine side, and the front half 1 1 a of the connecting pipe 1 is protruded toward the end plate 4. The rear half 1丨 faces the front end In the front portion of the first expansion chamber 8 on the back side of the plate 4. The second partition 6 , -8- (6) 1299379, which partitions the table 1 from the expansion chamber 8 and the table 2, is inserted through the rear portion of the outer tube having a larger diameter than the connecting tube 1 1 . Most of the outer cylinder 12 is placed inside the first expansion chamber 8. The front portion 1 2a of the outer cylinder 12 and the rear end portion 1 1 c of the connecting pipe 1 1 are joined by a funnel-shaped connecting cylinder 13 having a small front diameter and a flared diameter at the rear. The rear portion 12b in the expansion chamber 9 is joined to the expanded diameter front portion 14a of the funnel-shaped connecting cylinder 14 having a shape symmetrical with the connecting cylinder 13 described above. # The inside of the outer cylinder 1 2 is housed with a catalyst cylindrical body 15 (hereinafter simply referred to as a cylindrical body) which is concentric and has a smaller diameter. The cylindrical body 15 is formed by winding a punched metal (porous plate) carrying a catalyst into a cylindrical shape, and is interposed between the end edges of the connecting barrels 1 3 and 14 before and after. The tubular member 15 is surrounded by a short tubular member 16 that is closed before and after to cover the front and rear central portions, and the tubular member 16 is supported by the inner peripheral portion of the outer cylinder 12 by welding 16 6 a. The outer circumference of the cylindrical body 15 is welded to a plurality of portions at equal intervals in a plurality of circumferential directions to support the central portion thereof, and the gap is filled with stainless steel fibers 16b. The welding width can be reduced before and after the stainless steel fiber 16 b is kept welded, so that even the fel-like 15 thermal expansion film can maintain the support. The gap between the stainless steel fiber 16b' outer cylinder 1 2 and the cylindrical body 15 is divided into front and rear. Therefore, the cylindrical member 16 functions as a wall body that partitions the gap between the outer cylinder 1 2 and the cylindrical body j 5 into the front and rear. The cylindrical body 5 installed in the outer cylinder 1 2 above is composed of a perforated plate supported by a catalyst, and communicates with the upstream exhaust pipe 1 1 , and exhausts - 9 - (7) 1299379 The exhaust gas purifying device is constructed by passing through the tubular body 15' and passing through the cylindrical body 15' and passing through the cylindrical body 1 5 and the outer outer tube 1 2 to the downstream. A part of the outer cylinder 1 is penetrated and provided with exhaust gas discharge holes 17 and 17 . In the present embodiment, the drain holes 17 and 17 are provided on the lower side, and communicate with the first expansion chamber 8 outside the outer tube 1 2 . The number of the drain holes 17 is not limited, and the diameter is not limited. The arrangement of the discharge holes φ holes 17 and 17 is provided in front and rear of the wall body 16, and the wall body 16 is provided at the center portion of the front and rear of the cylindrical body 15, and the drain holes are provided. It is equal to the front and rear of the wall body 16. In the present embodiment, since the ease of processing and the output characteristics of the test have good results, the drain holes are formed at a position of 1/4 of the length of the outer tube before and after the wall body. The above-mentioned catalytic cylinder 1 5, the outer cylinder 1 2, and the drain hole 17 provided at the outer cylinder are connected to the exhaust connecting pipe 1 1 connected to the exhaust pipe of the engine, in a plurality of (In this embodiment, three openings are provided in the first expansion chamber 8 of the most upstream portion of the expansion chamber (the expansion chamber upstream of the exhaust gas flow). The U-shape which is generally seen in the plane of the small-diameter rear portion 14b of the connecting cylinder 1 4 which is connected to the rear portion 12b of the outer tube 9 in the second inflation chamber 9 is connected to the side, and the long side of the U-shape which is generally seen in the side view is connected. The front end portion 18 & (upstream end portion) of the communication pipe 18, the upstream straight portion 18b of the communication pipe 18 extends rearward in the second expansion chamber 9, and penetrates the second partition portion 7 to face the third expansion chamber. Within 1 0. The U-shaped portion 18c of the first communication pipe 18 faces the inside of the third expansion chamber 10, and the (-10-) 1299379 is swiveled forward, and is connected to the downstream portion of the U-shaped portion 18c. The second separator 7 faces the inside of the second expansion chamber 9. The downstream straight portion 18e of the first communication pipe 18 penetrates the first partition plate 6, and the open end 18f opens to the front half of the first expansion chamber 8. The first expansion chamber 8 is provided with a partition pipe 11 and a cylindrical body 15 carrying a catalyst, and the expansion chamber 8 and the drain holes 17 and 17 are used to communicate with the outer cylinder. 12. The downstream end of the communication pipe φ 18 communicating with the exhaust gas purifying device is opened at the expansion chamber 8. The first expansion chamber 8 and the second expansion chamber 9 are connected to each other by a short second communication pipe 19 that is provided through the first partition plate 6; the second expansion chamber 9 and the third expansion chamber 10 are used to penetrate the second partition. The shorter third communication pipe 20 provided in the plate 7 is connected in communication. After the third expansion chamber 10 is closed from the outside, the end plate 5 has a shape that is bent rearward, and a mounting hole 5 a is provided in the lower portion, and is joined to the mounting hole so as to penetrate the tail pipe 2 1 . 3 expansion chamber 1 〇 connected to the outside air _ connection. The rear portion 2 1 b of the tail pipe 2 1 protrudes rearward, and the intermediate portion to the front half portion 2 1 a faces the third expansion chamber 10. In the above, the exhaust gas of the engine flows from the connecting pipe 1 through the cylindrical body 15 to the communicating pipe 18 in the direction of the arrow. Further, the cylindrical body 15 is formed of a perforated plate, and since there are a plurality of holes, the exhaust gas passes through the cylindrical body 15 one by one, and a part thereof is discharged to the gap S between the outer tube 12 in the direction of the arrow. Since the gap S is partitioned by the wall body ι6, it is discharged from the drain hole 17 into the first expansion chamber 8. -11 - (9) 1299379 A gap s1 downstream of the wall body 16 is discharged from the hole of the perforated plate, and a part of the exhaust gas is discharged from the gap S1 by the drain hole 17 downstream of the wall body 16 in the direction of the arrow. It is in the first expansion chamber 8. After this process, the exhaust gas contacts the inner and outer circumferences of the cylindrical body 15 and is ignited, and the cylindrical body 15 holding the catalyst is disposed on the most upstream side of the muffler 1, and the combustion of the exhaust gas is good. Efficiency, and improve the purification performance of exhaust gas. φ, in particular, the catalyst is disposed in the expansion chamber 8 closest to the connecting pipe connected to the exhaust pipe, that is, the expansion chamber 8 disposed upstream of the exhaust gas flow, so that the catalyst is disposed at a position where the catalyst is easily reacted, and The purifying performance is further lifted. Further, by the above arrangement of the catalytic cylinders 15, the degree of freedom in the arrangement position of the catalyst in the muffler 1 is increased, and since the output of the engine can be adjusted in accordance with the set number of the discharge holes, the output can be easily adjusted. Further, since the catalyst cylinder 15 is formed by a perforated plate, the exhaust gas is increased in porosity to increase the flow of the exhaust gas, and the purification performance of the exhaust gas is improved. In addition, since the drain hole is installed on the upstream side, it is not necessary to take a noise reduction countermeasure. Fig. 3 is a cross-sectional plan view showing a muffler of another embodiment in which the exhaust gas purifying apparatus of the present invention is installed. Figure 4 is a side elevational view of the same longitudinal section. Fig. 5 is a cross-sectional view taken along line 5-5 of Fig. 4. Fig. 6 is a cross-sectional view taken along line 6-6 of Fig. 4. Hereinafter, the description will be made with reference to these drawings. The main body of the muffler 101 is constituted by a cylindrical cylindrical outer casing 102 as described above, and the cylindrical outer casing 102 is attached to the outer cylindrical body 102a and the punched hole -12-(10) 1299379 metal. The formed inner cylindrical bodies 102b are filled with the sound absorbing material l〇3, and the front and rear ends of the cylindrical outer casing 102 are closed by the front end plate 104 and the rear end plate 1〇5. The front and rear end portions of the cylindrical outer casing 102 closed by the front end plate 104 and the rear end plate 105 are partitioned by the partition plates 106 and 107 installed in the front and rear of the inner cylindrical body 102b, and are separated into 1 expansion chamber 108, second expansion chamber 109, and third expansion chamber 1 1 0. As shown in Figs. 1 and 2, the front end plate 104 is formed in a funnel shape which is biased toward one side and downward. The funnel-shaped opening portion 104a is joined to the connecting pipe iii connected to the exhaust pipe on the engine side, and the front half 1 1 1 a of the connecting pipe 1 protrudes toward the front end of the front end plate 104, and the rear half 1 1 1 b It faces the front part of the 1st expansion chamber 108 of the back side of the front-end board 104. The first partition plate 106 that partitions the first expansion chamber 108 from the second expansion chamber 109 is installed to have a diameter larger than the rear portion 112b of the outer tube 112 of the connection pipe 111. Most of the outer cylinder 1 12 is placed inside the first expansion chamber 108. Between the front portion 1 1 2a of the outer cylinder 1 12 and the rear end portion 1 1 1 c of the connecting pipe 1 1 1 , a connecting barrel 1 13 having a small diameter at the front and a funnel 扩张 having a flared diameter at the rear is used. The joining faces the rear portion 1 l2b of the second expansion chamber 109, and joins the expanded diameter front portion 14a of the funnel-shaped connecting cylinder 1 14 that is symmetrical with the connecting cylinder 1 1 3 . The inside of the outer cylinder 1 12 is housed with a cylindrical body 1 15 which is concentric and has a smaller diameter. The cylindrical body 1 15 is formed by winding a punched metal (porous plate) carrying a catalyst into a cylindrical shape, and is interposed between the edges of the connecting barrels 1 1 3 and 1 1 4 of the front and rear sides - 13 - ( 11) 1299379 As shown in FIG. 4, the cylindrical body 115 is joined to the center of the outer circumference by a pair of connecting frames 116 and 116 which are arranged in a substantially channel shape on the inner circumference of the center portion of the outer cylinder 1 12 in the axial direction. The portion 116a supports the tubular shape 115 in the outer cylinder 1 1 2 . The cylindrical body 1 15 installed in the outer cylinder 1 1 2 is formed by a perforated plate carrying a catalyst, communicates with the upstream exhaust connecting pipe 111, and exhausts the φ gas through the cylindrical body. The inner cylinder 1 1 2 in the outer side of the cylindrical body flows to the downstream, and the exhaust gas is purified through the cylindrical body 1 15 through the process to constitute an exhaust gas purifying device. A part of the outer cylinder 1 12 is penetrated and provided with exhaust gas discharge holes 1 1 7 and 1 17 . The drain holes 1 1 7 and 1 1 7 are provided on the lower side as shown in Fig. 2, and the space S between the cylindrical body 5 of the inner tubular member and the outer cylinder 1 1 2 and the outer side of the outer cylinder 112 1 The expansion chamber 108 is in communication. The number of the drain holes 1 1 7 is not limited, and the diameter is not limited. The discharge position of the holes 1 1 7 and 1 1 7 is set at a position 1⁄4 from both ends of the outer tube 1 1 2 . Therefore, the center portion of the cylindrical body 15 provided in the inner cylinder in the axial direction is separated from the front and rear by a distance of 1/4. The substantially U shape is seen in a plan view of the small-diameter rear portion 14b of the connecting cylinder 1 14 that is connected to the rear portion 1 12b of the outer tube 1 1 2 facing the outer portion of the second inflation chamber 109, and the U-shape of the connecting side is generally seen. The front end portion 1 1 8a (upstream end portion) of the first communication pipe 1 1 8 on the long side, and the upstream straight portion 1 1 8 b of the communication pipe 1 1 8 extend rearward in the second expansion chamber 1 0 9 The third diaphragm chamber 1 0 7 is inserted through the second diaphragm portion 1 0 7 . -14- (12) 1299379. The U-shaped portion 1 18c of the first communication tube 1 18 faces the third expansion chamber 1 1 and is folded back in the front U shape, and is connected to the downstream portion of the U-shaped portion 1 18 c. The midline straight portion d faces the second partition 107 and faces the inside of the second expansion chamber 109. The downstream straight portion 1 18 e of the first communication pipe 1 18 penetrates the first partition plate 106 , and the open end 1 18 f opens to the front half portion of the first expansion chamber 108 . In the first expansion chamber 1 〇8, the divided connecting pipes 1 1 1 and φ are provided with a cylindrical body 1 1 5 carrying a catalyst, and the expansion chamber 1 〇 8 and the drain hole 1 are used. 1 7 and 1 1 7 are connected to the outer cylinder 1 1 2; the downstream end of the communication pipe 118 communicating with the exhaust gas purifying device is opened to the expansion chamber 1〇8. The first expansion chamber 108 and the second expansion chamber 1 0 9 are connected by a short second communication pipe 1 1 9 provided through the first partition 106; the second expansion chamber 109 and the third expansion chamber 1 1 0 is connected by a short third communication pipe 120 provided through the second separator 1 〇7. After the third expansion chamber 1 10 is closed from the outside, the end plate 〖05 is a shape that is bent backwards and squares, and a mounting hole l〇5a is provided at the lower portion to penetrate the tail pipe 1 2 1 through the through hole. Engaging, the third expansion chamber is connected to the outside air. The rear portion 121b of the tail pipe 121 protrudes rearward, and the intermediate portion to the front half portion 121a face the inside of the third expansion chamber 11b. As described above, the catalytic cylinder (cylindrical body) is the same as the expansion chamber disposed on the engine side of the connecting pipe connected to the exhaust pipe, that is, the expansion chamber disposed upstream of the exhaust gas flow. That is, it is disposed in the first expansion chamber 1 〇8. -15- (13) 1299379 Fig. 7 is a view showing the characteristics of a muffler in which the exhaust gas purifying apparatus of the present invention is incorporated. Comparative Example 1 indicated by a thick broken line a is a structure in which a drain hole is not provided in the outer cylinder 1 2 described above, and Comparative Example 2 indicated by a thin broken line b is an example in which one drain hole is provided and indicated by a solid line c There are 2 drain holes for the spare. It can be understood from the graph that the engine output is b with one drain hole higher than the one without drain hole, and the engine c with two drain holes is better than the comparative example. 1 can improve the output characteristics to understand. However, the present invention exemplifies the case where two drain holes are provided in the outer cylinder, but the number of the drain holes is not limited. Further, the drain hole is provided on the lower side of the outer cylinder in the above embodiment, but may be provided at any position in the circumferential direction. [Effects of the Invention] In the first aspect of the invention, the catalyst cylinder is disposed in the expansion chamber closest to the connecting pipe connected to the exhaust pipe on the engine side, that is, disposed at the most upstream of the exhaust gas flow. In the expansion chamber, the outer cylinder covers the outer circumference of the catalytic cylinder, and the outer cylinder is provided with a drain hole which is spaced apart from the catalyst cylinder in the front-rear direction and has a space in the front-rear direction, so that the catalyst in the muffler is increased. The degree of freedom in the position is adjusted, and the output of the engine can be adjusted according to the set number of the drain holes, so the output is easily adjusted. Further, since the catalyst cylinder is formed by a perforated plate, the exhaust gas is made porous, and the exhaust gas flow is increased, and the purification performance of the exhaust gas is extracted. In addition to -16- (14) 1299379, since the drain hole is installed on the upstream side, it is not necessary to take measures to eliminate noise. Further, the catalyst is disposed in the expansion chamber closest to the connecting pipe connected to the exhaust pipe, that is, the expansion chamber disposed upstream of the exhaust gas flow, so that the catalyst is disposed at a position where the catalyst is easily reacted, and the catalyst can be further The purification performance is improved. The second aspect of the patent application scope of the present invention is the first item of the patent application scope, wherein: a plurality of drainage holes to be disposed in the outer cylinder, the respective # are disposed in the front half of the cylindrical body and In the second half, the output of the engine can be adjusted with exceptional efficiency. The third aspect of the patent application of the present invention is as in the second aspect of the patent application, wherein: in the gap between the catalyst cylinder and the outer cylinder, a plurality of drainage holes are respectively disposed in the wall body. In the front and rear, it is possible to effectively use the punching holes in the front and rear of the cylindrical body to achieve the effect of the front and rear drain holes, and to reliably support the center portion of the cylindrical body. Item 4 of the scope of the patent application of the present invention is as in the scope of claim 2, wherein the plurality of drain holes are disposed in the same manner as the front and rear sides of the wall body because the wall body is disposed at the center of the catalyst cylinder. Distance, so assembly can be assembled without having to identify before and after assembly. [Possibility of Industrial Applicability] The exhaust gas purification device of the present invention is suitable for storage in a muffler installed in a locomotive. BRIEF DESCRIPTION OF THE DRAWINGS -17- (15) 1299379 Fig. 1 is a side view showing an example of a locomotive to which the present invention is applied. Fig. 2 is a longitudinal sectional side view showing a muffler in which the exhaust gas purifying apparatus according to the first embodiment of the present invention is incorporated. Fig. 3 is a cross-sectional plan view showing a muffler incorporating the exhaust gas purifying apparatus of the second embodiment of the present invention. Fig. 4 is a longitudinal sectional side view showing the muffler of the exhaust gas purifying device of Fig. 3; Fig. 5 is a cross-sectional view taken along line 5-5 of Fig. 4. Fig. 6 is a cross-sectional view taken along line 6-6 of Fig. 4. Fig. 7 is a view showing the characteristics of a muffler in which the exhaust gas purifying apparatus of the present invention is incorporated. [Main component symbol description] 1 : Silencer 8, 9, 10: Expansion chamber Π : Exhaust connection pipe 1 2 : Outer cylinder 15 : Cylindrical body 16 : Wall body 1 7 : Drain hole -18-