1328639 九、發明說明： 【發明所屬之技術領域】 I發月關於種引擎’其具有用以藉由使廢氣通過一觸 • 女某的内部來淨化由於-内燃機之驅動所排出之廢氣的廢氣 淨化功能。 【先前技術】 到目前為止，已有一種引擎，其可藉由在一連接至該内 •㉟機引擎之一排氣口的排氣管中的排氣上游側中設置一主 要執行一還原動作之上游側觸媒，及藉由在前述觸媒之下 游侧中设置-主要執行一氧化動作的下游側觸女某，且藉由 在該上游側觸媒及該下游側觸媒之間連接一二次空氣供應 管’以排放淨化後的廢氣。在具有如上述之廢氣淨化功能 的引擎中，為了使該上游側觸媒及該下游侧觸媒兩者具有 正常功能，在該上游側觸媒與該下游側觸媒之間有需要提 供一預定的間隙。 Φ 在#方面修改已被設置在該排氣管中之該上游側觸 媒與該下游側觸媒兩者使其定位在消音器内，這在增進該 引擎之廢氣淨化功能上成為一優點，因為該觸媒可藉由在 該消音器中之廢氣的熱量而更快速地達到其觸發溫度。 附帶一提的是，在專散獻^已揭卜種具有廢氣淨 化功能的引擎，盆φ兮_ A w —狄 、忒一-人二氣供應官連接至介於該上游 側觸媒及該下游側觸媒之間的排氣管，且在該排氣管内包 含有該下游側觸媒的部分係被容置在該消音器内。 [專利文獻1]日本實用新型公報登錄第25G4008號。 109588.doc 【發明内容】 [本發明欲解決之問題] 然而，若嘗試設置該排氣管而使得該上游側觸媒及該下 彳觸媒6被定位在該消音器内，則該消音器會變得過 亦即，即使經調適而使得該上游側觸媒及該下游側觸 '者疋位在該消音器内，然而在該上游側觸媒及該下游 i觸媒之間仍有需要提供上述的間隙，且相應於此，亦需 _ A 4 /肖g ϋ。然而，尤其在諸如摩托車的跨騎式車輛 ，报難以在該車輛的佈置中配備具有過大之消音器的引 擎。 弓 务月有於上述的問題而提出，且其目的係要提供一 其中已破設置在一連接至該内燃機引擎之排氣口的 *中之上游側觸媒及下游側觸媒兩者皆被設置在消音 器内，且將該消音器之尺寸小型化。 I解決問題的方案]1328639 IX. Description of the invention: [Technical field to which the invention pertains] I. The engine of the invention has an exhaust gas purification for purifying the exhaust gas discharged by the driving of the internal combustion engine by passing the exhaust gas through the inside of the one-touch female Features. [Prior Art] Up to now, there has been an engine which can perform a main reduction operation in the upstream side of the exhaust gas in an exhaust pipe connected to one of the exhaust ports of the internal engine The upstream side catalyst is disposed on the downstream side of the catalyst, and the downstream side is mainly configured to perform an oxidation operation, and is connected between the upstream side catalyst and the downstream side catalyst. The secondary air supply pipe 'to discharge the purified exhaust gas. In an engine having the exhaust gas purifying function as described above, in order to have both the upstream side catalyst and the downstream side catalyst have a normal function, there is a need to provide a reservation between the upstream side catalyst and the downstream side catalyst. Clearance. Φ modifying the upstream side catalyst and the downstream side catalyst which have been disposed in the exhaust pipe to locate the muffler in the aspect of #, which is an advantage in improving the exhaust gas purifying function of the engine. Because the catalyst can reach its trigger temperature more quickly by the heat of the exhaust gas in the muffler. Incidentally, in an engine that has an exhaust gas purifying function, the basin φ兮_Aw-Di, 忒一-人二气供官 is connected to the upstream side catalyst and the An exhaust pipe between the downstream side catalysts, and a portion including the downstream side catalyst in the exhaust pipe is housed in the muffler. [Patent Document 1] Japanese Utility Model Publication No. 25G4008. [Description of the Invention] [The problem to be solved by the present invention] However, if the exhaust pipe is attempted to be positioned such that the upstream side catalyst and the lower jaw catalyst 6 are positioned in the muffler, the muffler It may become too much, that is, even if the upstream side catalyst and the downstream side toucher are clamped in the muffler after being adapted, there is still a need between the upstream side catalyst and the downstream i catalyst. The above gap is provided, and correspondingly, _A 4 / xiao g ϋ is also required. However, especially in straddle-type vehicles such as motorcycles, it is difficult to equip an engine with an excessive silencer in the arrangement of the vehicle. The bowing month is proposed in the above-mentioned problem, and the purpose thereof is to provide an upstream side catalyst and a downstream side catalyst in which the exhaust gas is connected to the exhaust port of the engine of the internal combustion engine. It is placed in the muffler and the size of the muffler is miniaturized. I solve the problem]
為了解決上述問胃’與本發明相關之引擎的特徵在於連 至内燃機引擎之排氣口的排氣管，被設置在該排氣管t 、側觸媒’被☆置在該排氣管中之上游側觸媒之下游 下=下游側觸媒，連接於該排氣f巾之該上游侧觸媒及該 側觸媒之間的二次空氣供應管，以及消音器，其具有 〜I空筒管部分及—第二"筒管部分，該第_中空筒 :邛刀在其端面中具有一用以導入該排氣管之開口，且該 中^管部分被連結至該開。且具有比該第-中空筒 B部分還小的外徑’且其中該上游側觸媒之一至少位在上 109588.doc 1328639 游側的部分被設置在該第二中空筒管部分中，且在一比該 上游側觸媒還下游側的該排氣管被容置。在本發明中，該 消音器具有該第一中空筒管部分及其外徑比前者還小之第 二中空筒管部分’且該上游側觸媒至少在該上游側之一部 分被設置在該第二中空筒管部分中。基於此理由，便可提 供圍繞该第二中空筒管部分之空間，以實現一弓丨擎，其 中該消音器可被小型化。 再者，本發明之一模式中，其特徵在於該引擎係一整體 擺動型引擎’其相對於一車輛本體而被可擺動地支撐。在 該整體擺動型引擎中，雖然諸如引擎之内燃機引擎或傳動 器之一驅動力傳動機構以及該消音器依照此一模式而被大 致設置成相鄰接，因為該空間被提供於該第二中空筒管部 刀周圍然而其可以避免在該消音器與該内燃機引擎以及 破設置於該消音器周圍的該驅動力傳動機構之間的妨礙。 再者，在本發明之一模式中，其特徵在於在該排氣管 中，被容置在該消音器中之一部分在已延伸於該消音器之 縱長方向之後彎曲。依照此模式，其可經調適而使得該引 擎可輸出高扭力，即使在一低速度區域中亦然，同時可維 持該排氣管之一長度，且該消音器可被小型化。 再者，在本發明之一模式中，其特徵在於該内燃機引擎 被設置成使得該内燃機引擎之一汽缸的一軸線變成大致呈 水平。依照此模式，由於該空間可被設置在該内燃機引擎 上方且該排氣管在該消音器中被彎曲，同時確保一容置機 殼等等於該空間中，便可以保持該排氣管的長度。 109588.docIn order to solve the above-mentioned problem, the engine related to the present invention is characterized in that an exhaust pipe connected to an exhaust port of an internal combustion engine engine is disposed in the exhaust pipe t and a side catalyst medium ☆ is placed in the exhaust pipe Downstream of the upstream side catalyst = downstream side catalyst, a secondary air supply pipe connected between the upstream side catalyst and the side catalyst of the exhaust f towel, and a muffler having ~I empty a bobbin portion and a second "bobbin portion, the first hollow cylinder: the rake has an opening in its end face for introducing the exhaust pipe, and the middle pipe portion is joined to the opening. And having a smaller outer diameter ' than the first hollow cylinder B portion and wherein a portion of the upstream side catalyst at least on the upstream side of the upper 109588.doc 1328639 is disposed in the second hollow bobbin portion, and The exhaust pipe on the downstream side of the upstream side catalyst is housed. In the present invention, the muffler has the first hollow bobbin portion and a second hollow bobbin portion 'the outer diameter smaller than the former, and the upstream side catalyst is disposed at least at a portion of the upstream side In the hollow tube section. For this reason, it is possible to provide a space around the second hollow bobbin portion to realize a bowing engine, wherein the muffler can be miniaturized. Further, in one mode of the present invention, the engine is an integral swing type engine which is swingably supported with respect to a vehicle body. In the integral oscillating type engine, although a driving force transmission mechanism such as an engine or an engine of an engine and the muffler are substantially disposed adjacent to each other according to the mode, since the space is provided in the second hollow However, it is possible to avoid interference between the silencer and the internal combustion engine and the drive force transmission mechanism disposed around the muffler. Further, in a mode of the present invention, in the exhaust pipe, a portion accommodated in the muffler is bent after extending in a longitudinal direction of the muffler. According to this mode, it can be adapted so that the engine can output high torque even in a low speed region while maintaining the length of one of the exhaust pipes, and the muffler can be miniaturized. Furthermore, in one mode of the invention, the internal combustion engine is arranged such that an axis of one of the cylinders of the internal combustion engine becomes substantially horizontal. According to this mode, since the space can be disposed above the engine of the internal combustion engine and the exhaust pipe is bent in the muffler while ensuring that a receiving casing or the like is in the space, the length of the exhaust pipe can be maintained. . 109588.doc
A 1328639 再者，在本發明之一模式中，其特徵在於該消音器具有 一流入抑制構件，其抑制一廢氣流入至該第二中空筒管部 分中。在此模式中’由於該流人抑制構件抑制該廢氣流入 至該第二中空筒管部分的事實，目此便可不需要提供熱絕 緣構件或消音構件’諸如玻璃絨’於該第二中空筒管部分 之外壁中’使得其可以將該第二中空筒管部分之外徑裝成 更小。 # &夕卜纟本發明之一模4中特徵在於該流入抑制構 件被設置在該排氣管被容置在該消音器中且排放該廢氣之 -末端部分與該二次空氣供應管被容置在該消音器中之一 部分之間。在此模式中’由於從該排氣管之端部部分排出 之廢氣撞抵於該流入抑制構件且不會直接噴射至一二次空 氣供應管側，因此該二次空氣供應管不會被過度加熱，如 此可抑制由於熱膨脹而使該二次空氣供應管伸長。 再者，在本發明之—模式中，其特徵在於該流入抑制構 ·#之-邊緣部分被連結至該第一中空筒管部分之一内部圓 周表面。依照此模式，流入至該第二中空筒管部分中之廢 氣量可被額外地減少，使得可將該第二中空筒管部分之外 徑製成更小。 再者，與本發明㈣之跨騎式車㈣—種具有上述引擎 之任-引擎的跨騎式車辅。該跨騎式車輛係例如一摩托車 (包括-輕型摩托車）、一四輪汽車、—雪車等等。在本發 明中，該消音器具有該第一中空筒管部分及其外徑比前者 還小之第二中空筒管部分，且該上游側觸媒至少在該上游 109588.doc -10- 偵_J之至少_ 八、丄 °p刀破設置在該第二中空筒管部分之一直徑方 向内。基於此原因’該消音器之尺寸可被製成較小，使 得’、可以貫現該跨騎式車輛，其中已避免該跨騎式車輛與 其他裝置的妨礙。 【實施方式】 以下將參考諸圖式來說明本發明之一實施例。 ^圖1至圖4係用以闡釋有關本發明第一實施例之具有廢氣 鲁 '淨化功月b的引擎。圖1係-與本發明相關之跨騎式車輛之 二實施例之摩托車的外觀側視圖，圖2係一具有淨化該廢 2之功能的裝置（以下稱之為廢氣淨化裝置）之截面視圖， 其中之引擎係與本發明之一實施例相關，而圖3係—立體 2圖’其中顯示相對於廢氣淨化裝置之—車輛行進方向的 則面部分。圖4係沿著圖2之剖面線IV_IV所取之截面視 圖0A 1328639 Furthermore, in one mode of the invention, the muffler has an inflow suppressing member that inhibits an exhaust gas from flowing into the second hollow bobbin portion. In this mode, since the flow suppressing member suppresses the fact that the exhaust gas flows into the second hollow bobbin portion, it is not necessary to provide a heat insulating member or a sound absorbing member 'such as glass wool' to the second hollow bobbin. The portion of the outer wall is such that it can fit the outer diameter of the second hollow bobbin portion to be smaller. And a mold 4 according to the present invention is characterized in that the inflow suppressing member is disposed in an end portion of the exhaust pipe that is housed in the muffler and discharges the exhaust gas, and the secondary air supply pipe is It is housed between one part of the muffler. In this mode, the exhaust gas discharged from the end portion of the exhaust pipe collides with the inflow suppressing member and is not directly injected to the secondary air supply pipe side, so the secondary air supply pipe is not excessively Heating, in this way, the elongation of the secondary air supply pipe due to thermal expansion can be suppressed. Further, in the mode of the present invention, it is characterized in that the edge portion of the inflow suppressing structure is joined to the inner circumferential surface of one of the first hollow bobbin portions. According to this mode, the amount of exhaust gas flowing into the second hollow bobbin portion can be additionally reduced, so that the outer diameter of the second hollow bobbin portion can be made smaller. Furthermore, the straddle type vehicle (four) of the invention (4) is a straddle type vehicle having the engine-engine. The straddle type vehicle is, for example, a motorcycle (including a light motorcycle), a four-wheeled vehicle, a snowmobile, and the like. In the present invention, the muffler has the first hollow bobbin portion and a second hollow bobbin portion whose outer diameter is smaller than the former, and the upstream side catalyst is at least at the upstream 109588.doc -10- _ At least _ eight, 丄°p knife break is disposed in the diameter direction of one of the second hollow bobbin portions. For this reason, the size of the muffler can be made smaller so that the straddle type vehicle can be realized, in which the straddle type vehicle and other devices are prevented from being obstructed. [Embodiment] An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 through Fig. 4 are diagrams for explaining an engine having an exhaust gas purification process b according to the first embodiment of the present invention. 1 is a side view of a motorcycle of a second embodiment of a straddle type vehicle relating to the present invention, and FIG. 2 is a cross-sectional view of a device having a function of purifying the waste 2 (hereinafter referred to as an exhaust gas purifying device) The engine is associated with an embodiment of the present invention, and FIG. 3 is a perspective view showing a portion of the face relative to the direction of travel of the vehicle with respect to the exhaust gas purification device. Figure 4 is a cross-sectional view taken along line IV_IV of Figure 2
j圖1中，摩托車1之底骨型車體車架2的前端部分支撐 一前又部3而可以左右轉動，且該車體車架2之一中央部分 支：整體擺動系統引擎單元4而可以上下擺動。在該引 擎單凡4上方係附接座部5。前輪6被設置在該前又部3之一 下方端部且把手7被設置在—上方端部，且後輪峨設置在 該引擎單元4之後端部分中。該引擎單元4係一種結構且 中續環水冷式引擎及-具有V型皮帶系統無段式傳動器之 傳動：機殼已製成一本體，I引擎1〇被安裝有内燃機引擎 U之汽缸，其係朝向一大致水平的方向。 在該 引擎10之内燃機引擎11之一 排氣口係連接_ 用以將 109588.doc • II . 後面至Γ車輛行進方向（在相同圖式中所示之Fr方向） Μ ψ之排氣^ 15，該廢氣係'藉由該内燃機引擎11之雜動而 a。該排氣管15在已從-與該内燃機引擎^相連接之一 2 =伸絲較料輛行㈣大致直線地 k伸在一車輛本體後#，且該排氣管15之一下游部分 二❹考圖2,排氣管下游部分）被容置在一消音器％中。 尾官17被連接至該消音器3G，該尾管係將廢氣排出至該 車輛行進方向後面。 在包括該消音器3 0及該排氣管下游部分i 5 a的情況下被 構成之-廢氣淨化裝置20係淨化已從引擎排出之廢氣中的 NOx、C0及HC ’纟㈣置在該後輪之車輛行進方向右 側。一托架1 8連接至該廢氣淨化裝置2〇之一上方部分，該 托架18被牢固地螺合至該引擎單元4。藉此，該廢氣淨化 裝置20可與該引擎單元4_起垂直地擺動。—二次空氣供 應管23被導入至該消音器3〇中，其構成該廢氣淨化裝置 20，且該二次空氣供應管23之一端部係連接至該排氣管下 游部分15a(參考圖2至4)。 一二次空氣導入管2 5之一端側被連接至該二次空氣供應 管23突出至該消音器30之外側的另一端部，且該二次空氣 導入管25之另一端側被連接至一振簧閥總成26。該振簧閥 總成26位在一後面部分罩蓋内部且被設置在該座部5之後 面部分且位在該後輪8上方，且具有一僅允許二次空氣流 動至一觸媒側且防止沿相反方向流動的功能。 以下將參考圖2至圖4來詳細說明與本發明第一實施例相 I09588.doc η 1328639 關之廢氣淨化裝置20。 如圖2所示，構成該廢氣淨化裝置20之消音器3〇被建構 成包括一截面形狀大致呈橢圓形的管狀第_中空筒管部人 32、一連結至該第一中空筒管部分32之車輛行進方向後= 的開口部分之後罩蓋構件36及一管狀第二中空筒管部分 33 ^該中空筒管部分32及該後罩蓋構件36係各別形成—雙 層結構。一玻璃絨32a充填在該中空筒管部分32之一外側 • 構件及一内側構件之間，以加強該消音器30之熱絕緣屬 性。該第一中空筒管部分在一車輛行進方向前面的端面係 由一大致呈碗狀的端面構件39所構成（參考圖3)。該端面構 件39具有一底部部分39e ’且一導入該排氣管下游部分 之開口 39a係形成在該底部部分39e中之一下侧邊位置。該 第一中空筒管部分33具有一小於該第一中空筒管部分32之 外徑的直徑，且被設置在該車輛行進方向上比第一中空筒 φ 官部分32還前面的位置。再者，該第二中空筒管部分33以 其在一邊緣部分33b中之—端側連結至該端面構件Μ之該 開口 39a的一邊緣部分39<1。 該消音器30的内部依序從該車輛行進方向前面藉由第 一隔壁57及第二隔壁58分隔成第一膨脹室5〇、第二膨脹 至51及第二膨脹室52。第一管件％被設置在該第一膨脹 室50及該第二膨脹室51中，其貫穿該I隔壁57而使廢 氣可以從該第一膨脹室5〇流動至該第二膨脹室$ 1。此 外，第一官件54設置在該第二膨脹室$丨及該第三膨脹室 109588.doc •13· 5 2 中，^ 室51、、4 第二隔壁58而使得廢氣可讀該第二膨胳 至51流動至該第三膨脹室52。 蟛脹 該排氣管下游部分15a從一位在該第 之另-端側上之排氣管導入痒…而被導入二。33 中，且踨访由± 散等入至該岫音器30 4輛行進方向前面朝向後面而延伸在 之一縱基士人 9 55In Fig. 1, the front end portion of the bottom bone type body frame 2 of the motorcycle 1 supports a front portion 3 and is rotatable left and right, and a central portion of the body frame 2 is supported: the overall swing system engine unit 4 It can swing up and down. The seat 5 is attached above the engine unit 4. The front wheel 6 is disposed at one lower end of the front portion 3 and the handle 7 is disposed at the upper end portion, and the rear rim is disposed in the rear end portion of the engine unit 4. The engine unit 4 is a structure and a medium-continuous water-cooled engine and a transmission with a V-belt system stepless transmission: the casing has been formed into a body, and the I engine 1 is equipped with a cylinder of the internal combustion engine U. It is oriented in a generally horizontal direction. The exhaust port of one of the internal combustion engines 11 of the engine 10 is connected to the exhaust of the vehicle to the direction of travel of the vehicle (in the Fr direction shown in the same figure) ^ ^ 15 The exhaust gas is 'a' by the pulsation of the internal combustion engine 11 . The exhaust pipe 15 extends substantially in a vehicle line from a vehicle 2 connected to the internal combustion engine engine 2 = a wire (four), and a downstream portion of the exhaust pipe 15 Referring to Figure 2, the downstream portion of the exhaust pipe is housed in a silencer %. The tail section 17 is connected to the muffler 3G, which exhausts the exhaust gas to the rear of the vehicle traveling direction. The exhaust gas purifying device 20 is configured to purify the NOx, C0, and HC in the exhaust gas discharged from the engine, including the muffler 30 and the downstream portion i 5 a of the exhaust pipe. The vehicle of the wheel travels to the right. A bracket 18 is connected to an upper portion of the exhaust gas purifying device 2, and the bracket 18 is firmly screwed to the engine unit 4. Thereby, the exhaust gas purifying device 20 can swing vertically from the engine unit 4_. a secondary air supply pipe 23 is introduced into the muffler 3, which constitutes the exhaust gas purifying device 20, and one end of the secondary air supply pipe 23 is connected to the exhaust pipe downstream portion 15a (refer to FIG. 2) To 4). One end side of the secondary air introduction pipe 25 is connected to the other end of the secondary air supply pipe 23 protruding to the outer side of the muffler 30, and the other end side of the secondary air introduction pipe 25 is connected to one Reed valve assembly 26. The vibrating spring valve assembly 26 is located inside a rear portion of the cover and is disposed behind the seat portion 5 and above the rear wheel 8 and has a flow of only secondary air to a catalyst side. Prevents the function of flowing in the opposite direction. The exhaust gas purifying device 20, which is related to the first embodiment of the present invention, I09588.doc η 1328639, will be described in detail below with reference to Figs. 2 to 4 . As shown in FIG. 2, the muffler 3's constituting the exhaust gas purifying device 20 is constructed to include a tubular hollow tubular portion 32 having a substantially elliptical cross-sectional shape, and a first hollow tubular portion 32 coupled thereto. After the opening portion of the vehicle travel direction = the cover member 36 and a tubular second hollow bobbin portion 33, the hollow bobbin portion 32 and the rear cover member 36 are each formed in a two-layer structure. A glass wool 32a is filled between the member and an inner member of one of the hollow bobbin portions 32 to reinforce the thermal insulation property of the muffler 30. The end face of the first hollow bobbin portion in front of the traveling direction of the vehicle is constituted by a substantially bowl-shaped end face member 39 (refer to Fig. 3). The end face member 39 has a bottom portion 39e' and an opening 39a introduced into the downstream portion of the exhaust pipe is formed at a lower side position of the bottom portion 39e. The first hollow bobbin portion 33 has a diameter smaller than the outer diameter of the first hollow bobbin portion 32, and is disposed in front of the first hollow cylinder φ official portion 32 in the traveling direction of the vehicle. Further, the second hollow bobbin portion 33 is joined to an edge portion 39<1 of the opening 39a of the end member member with its end side in an edge portion 33b. The inside of the muffler 30 is sequentially divided into a first expansion chamber 5A, a second expansion 51, and a second expansion chamber 52 by a first partition wall 57 and a second partition wall 58 from the front side in the traveling direction of the vehicle. The first pipe member % is disposed in the first expansion chamber 50 and the second expansion chamber 51, and penetrates the I partition wall 57 to allow waste gas to flow from the first expansion chamber 5 to the second expansion chamber $1. In addition, the first official member 54 is disposed in the second inflation chamber 丨 and the third inflation chamber 109588.doc • 13· 5 2 , the second compartment 58 of the chamber 51, 4, so that the exhaust gas can read the second The expansion to 51 flows to the third expansion chamber 52. The inflation portion downstream portion 15a is introduced into the second portion from an exhaust pipe on the other end side. In the middle of the 33rd, and the Suwa is inserted into the arpegator 30, the front direction of the vehicle is extended toward the rear.
處被之後在車輛行進方向最後面部分& 曲成狀㈣字形’藉此被調適成使得排放該廢氣之 -端部部分15j被定位在位於該車輛行進方向最前 。膨脹室5G中。藉此，便可以縮短該消音器3()在該縱長方The rear portion is then curved (four-shaped) in the direction of travel of the vehicle so as to be adapted such that the end portion 15j discharging the exhaust gas is positioned at the forefront of the direction of travel of the vehicle. In the expansion chamber 5G. Thereby, the silencer 3() can be shortened in the longitudinal direction
向上的長度’同時保持該排氣管下游部分15&被容置在該 消音器30中之一長度。 XThe upward length ' while maintaining the exhaust pipe downstream portion 15 & is accommodated in one of the lengths of the muffler 30. X
在該排氣管下游部分15a中設置有一主要執行還原動作 之上游側觸媒21 ’且在其下游側設置一主要執行氧化動作 之下游側觸媒22。在該上游側觸媒21與該下游側觸媒22之 3係連接該二次空氣供應管23，其供應二次空氣至該排氣 管下游部分15a中。在該觸媒被設置在該排氣管下游部分 15a處的一部分的直徑係比該排氣管下游部分15&沒有設置 觸媒之部分的直徑還大，且被形成在該觸媒有被設置的部 分之截面積大致相等於其他部分的截面積。藉此，其被調 適成使得該廢氣可以順利地流經該觸媒的内部。 在該排氣管下游部分15a中之該上游侧觸媒21及該下游 側觸媒22被設置在該排氣管下游部分丨5a中之該上游側觸 媒2 1之一後端21 a及該下游側觸媒22之一前端22a之間，且 在其間提供一預疋的間隙。再者，其經調適而使得當由該 I09588.doc 14 _ 排氣推進力而產生一負壓時，該二次空氣從該 工氣供應管23流入至該排氣管下游部分15a »之後， 卜 戶斤 j ；L 本實施例中’其經調適以將該消音器30建構 :包括被設置在前者筒管部分前面中且被連結至該端面構 之該底。(5部分39e的下方部分之該第一中空筒管部分 i第中二筒管部分33 ^再者，該上游側觸媒21被設 置，使得：整體被定位在該第二中空筒管部分之直徑方向 P中藉由如此做，該上游側觸媒2 1及該下游側觸媒22 :者皆被設置在該消音器30中，其觸媒動作可藉由在該消 s器30中之熱所觸發，且其可以使該消音器％的尺寸被製 成較小。亦即，如圖3所示，藉由在該第二中空筒管部分 上方提供一空間，其經調適而使得該消音器％不會妨礙到 該車輛的其他裝置。 在該排氣管下游部分l5a中與該上游側觸媒21相關的一 部分之兩端係被形成為漸細狀部分，且在該兩漸細狀部分 之間的一上游側漸細部分15i與該第二中空筒管部分之另 一端部部分33a之間係連結在一起，且該排氣管下游部分 15a被支樓在該車輛行進方向前面。再者，該排氣管下游 部分15a由該第一隔壁57及該第二隔壁58支撐在該消音器 3 0内部。 如圖2至圖4所示，在該端面構件39内部係設有一流入抑 制構件35 ’其抑制該廢氣流入至該第二中空筒管部分33。 該流入抑制構件35被形成大致類似一碗狀，其具有一底部 表面’且在該底部表面中具有一比另一者還深之半圓形底 J09588.doc •15- ^328639In the exhaust pipe downstream portion 15a, an upstream side catalyst 21' which mainly performs a reducing operation is disposed, and a downstream side catalyst 22 which mainly performs an oxidation operation is disposed on the downstream side thereof. The upstream side catalyst 21 and the downstream side catalyst 22 are connected to the secondary air supply pipe 23, which supplies secondary air to the exhaust pipe downstream portion 15a. A diameter of a portion of the catalyst disposed at the downstream portion 15a of the exhaust pipe is larger than a diameter of a portion of the exhaust pipe downstream portion 15& not provided with a catalyst, and is formed in the catalyst to be disposed The cross-sectional area of the portion is approximately equal to the cross-sectional area of the other portion. Thereby, it is adapted such that the exhaust gas can smoothly flow through the inside of the catalyst. The upstream side catalyst 21 and the downstream side catalyst 22 in the downstream portion 15a of the exhaust pipe are disposed at a rear end 21a of the upstream side catalyst 2 in the downstream portion 丨5a of the exhaust pipe and The front side 22a of one of the downstream side catalysts 22 is provided with a pre-twisted gap therebetween. Furthermore, it is adapted such that when a negative pressure is generated by the I09588.doc 14 _ exhaust propulsion force, the secondary air flows from the gas supply pipe 23 to the downstream portion 15a of the exhaust pipe, In the present embodiment, it is adapted to construct the muffler 30: including the bottom disposed in the front of the former bobbin portion and joined to the end face. (the first hollow bobbin portion i of the lower portion of the fifth portion 39e), the second intermediate bobbin portion 33. Further, the upstream side catalyst 21 is disposed such that the whole is positioned in the second hollow bobbin portion In the diametrical direction P, the upstream side catalyst 2 1 and the downstream side catalyst 22 are disposed in the muffler 30, and the catalyst action can be performed in the squeezing device 30. Heat is triggered, and it can make the size of the muffler % smaller. That is, as shown in FIG. 3, by providing a space above the second hollow bobbin portion, it is adapted such that The muffler % does not obstruct the other devices of the vehicle. The two ends of the portion of the exhaust pipe downstream portion 15a associated with the upstream side catalyst 21 are formed into a tapered portion, and in the two tapers An upstream side tapered portion 15i between the portions is coupled to the other end portion 33a of the second hollow bobbin portion, and the exhaust pipe downstream portion 15a is preceded by the branch in the direction of travel of the vehicle Furthermore, the exhaust pipe downstream portion 15a is composed of the first partition wall 57 and the second partition wall 58. The inside of the muffler 30 is supported. As shown in Figs. 2 to 4, an inflow suppressing member 35' is disposed inside the end face member 39, which suppresses the inflow of the exhaust gas to the second hollow bobbin portion 33. The member 35 is formed substantially like a bowl having a bottom surface 'and having a semicircular bottom deeper than the other in the bottom surface J09588.doc • 15- ^ 328639
邛。卩分35a。該流入抑制構件35之一邊緣部分35c被形成與 該端面構件39之一邊緣部分39e的形狀相同，且該流入抑 制構件35被連結在其邊緣部分35c之一外圓周表面至該端 面構件39之該邊緣部分39e的内圓周表面。再者，該流入 抑制構件35被設置成使得m抑制構件Μ [被形成狀似 碗狀之底面被定位在該二次空氣供應管23被容置在該消音 器30中之邛刀與該排氣管下游部分i5a之該端部部分i5j 之間。基於此原目’[抑制從該排氣管下游部分15a排出 之高溫廢氣流入至該第二中空筒管部分33中，使得其可以 增加熱絕緣屬性而不會造成該第二中空筒管部分33進入至 不同於該第-中空筒管部分32之該雙層結構中。因此，該 第二中空筒管部分33之外徑被形成較小。再者，由於已從 該排氣管下游部分15a之端部部分排出之廢氣撞抵於該流 入抑制構件35且不會直接噴射至該二次空氣供應管23中， 因此可避免由於該二次空氣供應管23之熱膨脹所造成的伸 長’且可以防止由於二次空氣本身流入至該二次空氣供應 管23中被過度加熱而造成之所供應的氧氣絕對量的減少。 附帶-提’-插入孔35d被形成在該流入抑制構件35的下 方部分’該排氣管下游部分15a從該插入孔35d被導入至比 該消音器30中之流入抑制構件35還深的内部，且該下游側 觸媒22及該排氣管比訂游側觸媒22還更下游的部分被容 置在-由該流入抑制構件35、該第一中空筒管部㈣及該 後罩蓋構件36所構成的管狀主體中。 二次空氣供應管23在該流人抑制構件35之-外側處連接 109588.doc .16_ 1328639 至該排氣管下游部分15a，同時通過於該端面構件39與該 流入抑制構件35之間。具體而言，—插入孔3外被設置在 該端面構件39之車輛本體側上方部分中，且該二次空氣供 .應管23從該插入孔39b插入至消音器3〇。該二次空氣供應 管23係由-第—冑分供應管2取—第：部分供應管仏所 構成。如圖4所示，該第一部分供應管23d被導入至該消音 器30之一内側，且被製造成可沿著該流入抑制構件”之該 φ 底部部分35&的側邊表面延伸。該第一部分供應管23d之一 端部部分2 3 g與被設置在該消音器3 〇中之下方部分中的排 氣管下游部分15a相連接。一二次空氣流入埠15f被設置在 該排氣管下游部分15a中，且該第一部分供應管23d之一端 部部分23g及該二次空氣流入埠15f之一圓周邊緣被焊接在 一起《附帶一提，在該排氣管下游部分15a之該二次空氣 流入埠15f附近，該排氣管下游部分15a係藉由一上側邊半 圓筒狀構件15h及一下側邊半圓筒狀構件15g所構成，該上 • 側邊半圓筒狀構件係大致呈半圓筒狀且構成該排氣管下游 部分15a之一上側邊，且該下側邊半圓筒狀構件同樣大致 呈半圓筒狀且構成該排氣管下游部分l5a之一下侧邊（參考 圖2)。再者，該二次空氣流入埠1 5f被形成在該上側邊半圓 筒狀構件15h。該第一部分供應管234之另-端部部分23h 係在該消音器30的外側與該第二部分供應管236焊接在一 起’使得該廢氣淨化裝置20之組裝變得容易。 如上所述，依照本實施例，由於該消音器3〇被建構成包 括忒第一中空筒管部分32及其外徑比該第一中空筒管部分 109588.doc •17· 1328639 還小的第二中空筒管部分33，以及該上游側觸媒2丨沿一直 锂方向被設置在該第二中空筒管部分33内部的事實，便可 以實現具有較小廢氣淨化裝置的引擎。 附帶一提，本發明並未侷限於上述實施例，其可以具有 各種不同的修飾。例如，可藉由僅使該上游側觸媒2丨之一 部分突出於該第一中空筒管部分32而調適成使得該已突出 之部分被谷置在該第二中空筒管部分33中。圖5及6係顯示 # 與此模式相關之位在該引擎1 〇中之廢氣淨化裝置20的圖 式，其中圖5係該廢氣淨化裝置2〇之截面視圖，而圖6係該 廢氣淨化裝置20在該車輛行進方向中之立體視圖。在此， 忒廢氣淨化裝置20與上述實施例相關的相似部件係以相同 的元件符號標示。 如圖5及6所示，在本實施例中，其經調適而使得導入該 排氣管下游部分15a之開口 39a被設置在該端面構件39之底 部部分39e的下方部分中。再者，其經調適而使得該上游 • I觸媒21之車輛行進方向前側被容置在該第二中空筒管 部分33的内部，且—後側被容置在該第一中空筒管部分32 中。此外，在本實施例中，其經調適而使得在該端面構件 39之底部部分396中之開口 39a的附近以及該第二中空筒管 部分33之一端部部分33b被焊接，且該開口 39a之邊緣部分 以及該排氣管下游部分15a之側邊部分被焊接，藉此造成 o h面構件3 9具有作為該流入抑制構件的功能。該端面構 件3 9形成雙層結構，且藉由使一熱絕緣材料充填於其内 @及外壁之間來増進該消音器3G的熱絕緣屬性。 109588.doc 1328639 附帶S纟本貫施例中，其經調適而使得藉由在該端 面構件39之底部部分3%中形成該插入孔39b，該二次空氟 供應管23可從該插入孔39b被導入至該消音器再者， 該二次空氣供應管23延伸於與該排氣管下游部分丨“相同 的方向且從該處隔開，而在一彎曲部分23e中被彎向一棑 氣管下游部分1 5a側邊。一環狀強化構件42被安裝至該二 次空氣供應管23之一端部部分，且該強化構件42、該二次 空氣供應f 23之一側邊部分及該排氣管下游部分】之二 次空氣流入埠15f的附近係被焊接在一起。由於該二次空 氣供應管23延伸於與該排氣管下游部分15a相同之方向的 事實，該二次空氣供應管23以及該排氣管下游部分i5a之 熱膨脹方向變為相同’使得兩管件之連接強度增加。再 者，在本實施例中，該排氣管下游部分15a由該第二中空 请官部分33之另一端部部分33a以及不僅該第一隔壁57及 a亥第一隔壁58且亦由一板狀支撐構件60所支樓。此支撑構 件60在其邊緣部分被彎曲，相關的邊緣部分之一外部圓周 表面60a被連結在該消音器30之一内部圓周表面的一部分 中。 如上所述，且在本實施例中’由於該消音器3〇被建構成 包括該第一中空筒管部分32及其外徑比該第一中空筒管部 分還小的第一中空请管部分3 3 ’以及該上游側觸媒21沿— 直徑方向被設置在该第二中空筒管部分33内部的事實，便 可以實現具有更小的廢氣淨化裝置的引擎。 【圖式簡單說明】 109588.doc 1328639 圖1係一摩托車的側視圖’其中安裝有本發明之一第一 實施例的引擎。 圖2係該引擎之廢氣淨化裝置的一截面視圓。 圖3係該廢氣淨化裝置在一車輛行進方向前面的立體視 圖。 圖4係沿著圖2之剖面線ιν·Ιν所取的截面視圖。 圖5係本發明之另一實施例之一廢氣淨化裝置的截面視 圖。 圖6係本發明之另一實施例之一廢氣淨化裝置的立體 圖。 【主要元件符號說明】 1 摩托車 2 車體車架 3 前又部 4 引擎單元 5 座部 6 前輪 7 把手 8 後輪 10 引擎 11 内燃機引擎 15 排氣管 15a 排氣管下游部分 17 尾管 109588.doc 1328639Hey. Score 35a. One edge portion 35c of the inflow suppressing member 35 is formed in the same shape as one edge portion 39e of the end surface member 39, and the inflow suppressing member 35 is joined to the outer circumferential surface of one of the edge portions 35c thereof to the end member 39 The inner circumferential surface of the edge portion 39e. Further, the inflow suppressing member 35 is disposed such that the m suppressing member Μ [the bottom surface formed like a bowl shape is positioned in the boring tool and the row in which the secondary air supply pipe 23 is housed in the muffler 30 Between the end portions i5j of the downstream portion i5a of the trachea. Based on this original item '[Suppressing the high-temperature exhaust gas discharged from the exhaust pipe downstream portion 15a into the second hollow bobbin portion 33 so that it can increase the thermal insulation property without causing the second hollow bobbin portion 33 It enters into the two-layer structure different from the first hollow tubular portion 32. Therefore, the outer diameter of the second hollow bobbin portion 33 is formed to be small. Further, since the exhaust gas which has been discharged from the end portion of the exhaust pipe downstream portion 15a hits the inflow suppressing member 35 and is not directly injected into the secondary air supply pipe 23, it is possible to avoid The elongation caused by the thermal expansion of the air supply pipe 23 can prevent a decrease in the absolute amount of supplied oxygen due to the secondary air itself flowing into the secondary air supply pipe 23 being excessively heated. An attachment-lifting hole 35d is formed in a lower portion of the inflow suppressing member 35. The exhaust pipe downstream portion 15a is introduced from the insertion hole 35d into a depth deeper than the inflow suppressing member 35 in the muffler 30. And the downstream side catalyst 22 and a portion of the exhaust pipe that is further downstream than the booking side catalyst 22 are housed by the inflow suppressing member 35, the first hollow bobbin portion (four), and the rear cover The tubular body formed by the member 36. The secondary air supply pipe 23 connects 109588.doc.16_1328639 to the exhaust pipe downstream portion 15a at the outer side of the flow suppressing member 35 while passing between the end face member 39 and the inflow suppressing member 35. Specifically, the outside of the insertion hole 3 is provided in the upper portion of the end surface member 39 on the vehicle body side, and the secondary air supply pipe 23 is inserted into the muffler 3 from the insertion hole 39b. The secondary air supply pipe 23 is constituted by a -partial supply pipe 2 - a part: supply pipe. As shown in FIG. 4, the first partial supply pipe 23d is introduced to one of the inner sides of the muffler 30, and is formed to extend along the side surface of the φ bottom portion 35& of the inflow suppressing member. One end portion portion 2 3 g of a part of the supply pipe 23d is connected to the exhaust pipe downstream portion 15a provided in the lower portion of the muffler 3, and a secondary air inflow port 15f is disposed downstream of the exhaust pipe In the portion 15a, one of the end portions 23g of the first partial supply pipe 23d and one of the circumferential edges of the secondary air inflow port 15f are welded together. Incidentally, the secondary air at the downstream portion 15a of the exhaust pipe The downstream portion 15a of the exhaust pipe is formed by an upper side semi-cylindrical member 15h and a lower side semi-cylindrical member 15g, which is substantially a semi-cylinder. The upper side of the exhaust pipe downstream portion 15a is configured to be substantially semi-cylindrical and constitutes a lower side of one of the exhaust pipe downstream portions 15a (refer to FIG. 2). Furthermore, the secondary air flow A 埠1 5f is formed on the upper side semi-cylindrical member 15h. The other end portion 23h of the first partial supply tube 234 is welded to the second partial supply tube 236 on the outside of the muffler 30. The assembly of the exhaust gas purifying device 20 becomes easy. As described above, according to the present embodiment, since the muffler 3 is constructed to include the first hollow bobbin portion 32 and its outer diameter than the first hollow bobbin portion 109588.doc • 17· 1328639 The still small second hollow bobbin portion 33, and the fact that the upstream side catalyst 2丨 is disposed inside the second hollow bobbin portion 33 along the lithium direction, can be realized The engine of the small exhaust gas purifying device. Incidentally, the present invention is not limited to the above embodiment, and may have various modifications. For example, only one portion of the upstream side catalyst 2 may be protruded from the first portion. The hollow bobbin portion 32 is adapted such that the protruding portion is placed in the second hollow bobbin portion 33. Figures 5 and 6 show the exhaust gas purification in the engine 1 相关 associated with this mode. The schema of the device 20, 5 is a cross-sectional view of the exhaust gas purifying device 2, and FIG. 6 is a perspective view of the exhaust gas purifying device 20 in the traveling direction of the vehicle. Here, the exhaust gas purifying device 20 is similar to the above-described embodiment. The same component symbols are used. As shown in Figs. 5 and 6, in the present embodiment, it is adapted such that the opening 39a introduced into the downstream portion 15a of the exhaust pipe is disposed below the bottom portion 39e of the end member 39. Further, it is adapted such that the front side of the upstream direction of the vehicle of the upstream I catalyst 21 is accommodated inside the second hollow bobbin portion 33, and the rear side is accommodated in the first hollow In the bobbin portion 32. Further, in the present embodiment, it is adapted such that the vicinity of the opening 39a in the bottom portion 396 of the end face member 39 and one end portion 33b of the second hollow bobbin portion 33 are welded, and the opening 39a The edge portion and the side portion of the exhaust pipe downstream portion 15a are welded, thereby causing the oh surface member 39 to function as the inflow suppressing member. The end face member 39 forms a two-layer structure and breaks into the thermal insulation property of the muffler 3G by filling a heat insulating material between the inner and outer walls. 109588.doc 1328639, in conjunction with the present embodiment, adapted to allow the secondary empty fluorine supply tube 23 to be inserted from the bottom portion 3% of the end member 39 by the insertion hole 39b 39b is introduced into the muffler. Further, the secondary air supply pipe 23 extends in the same direction as the downstream portion of the exhaust pipe and is separated therefrom, and is bent in a curved portion 23e. a side portion of the downstream portion 15a of the trachea. An annular reinforcing member 42 is attached to one end portion of the secondary air supply pipe 23, and the reinforcing member 42, a side portion of the secondary air supply f23, and the row The vicinity of the secondary air inflow enthalpy 15f of the downstream portion of the trachea is welded together. Since the secondary air supply pipe 23 extends in the same direction as the downstream portion 15a of the exhaust pipe, the secondary air supply pipe 23 and the direction of thermal expansion of the downstream portion i5a of the exhaust pipe become the same 'the connection strength of the two pipe members is increased. Further, in the present embodiment, the downstream portion 15a of the exhaust pipe is constituted by the second hollow requesting portion 33 The other end portion 33a and not only The first partition wall 57 and the first partition wall 58 are also supported by a plate-shaped support member 60. The support member 60 is bent at an edge portion thereof, and an outer circumferential surface 60a of one of the associated edge portions is coupled thereto. a portion of the inner circumferential surface of one of the muffler 30. As described above, and in the present embodiment 'because the muffler 3 is constructed to include the first hollow bobbin portion 32 and its outer diameter than the first hollow The fact that the bobbin portion is also small and the first hollow tube portion 3 3 ' and the upstream side catalyst 21 are disposed in the diametrical direction inside the second hollow bobbin portion 33 enables a smaller exhaust gas purification Fig. 1 is a side view of a motorcycle in which a first embodiment of the present invention is mounted. Fig. 2 is a cross section of the exhaust gas purifying device of the engine. Figure 3 is a perspective view of the exhaust gas purifying device in front of a vehicle traveling direction. Figure 4 is a cross-sectional view taken along line ιν·Ιν of Figure 2. Figure 5 is another embodiment of the present invention Exhaust gas purification Figure 6 is a perspective view of an exhaust gas purifying apparatus according to another embodiment of the present invention. [Main component symbol description] 1 Motorcycle 2 Body frame 3 Front and rear 4 Engine unit 5 Seat 6 Front wheel 7 Handle 8 rear wheel 10 engine 11 internal combustion engine 15 exhaust pipe 15a exhaust pipe downstream part 17 tail pipe 109588.doc 1328639
18 托架 20 廢氣淨化裝置 21 上游側觸媒 22 下游側觸媒 23 二次空氣供應管 23d 第一部分供應管 23e 第二部分供應管 25 二次空氣導入管 26 振簧閥總成 30 消音器 32 第一中空筒管部 33 第二中空筒管部 35 流入抑制構件 36 後罩蓋構件 39 端面構件 42 強化構件 50 第一膨脹室 51 第二膨脹室 52 第三膨脹室 54 第二管件 56 第一管件 57 第一隔壁 58 第二隔壁 60 支撐構件 109588.doc •2118 Bracket 20 Exhaust gas purification device 21 Upstream side catalyst 22 Downstream side catalyst 23 Secondary air supply pipe 23d First part supply pipe 23e Second part supply pipe 25 Secondary air introduction pipe 26 Reed valve assembly 30 Silencer 32 First hollow bobbin portion 33 second hollow bobbin portion 35 inflow suppressing member 36 rear cover member 39 end member 42 reinforcing member 50 first expansion chamber 51 second expansion chamber 52 third expansion chamber 54 second tube 56 first Pipe member 57 first partition wall 58 second partition wall 60 support member 109588.doc • 21