M412240 五、新型說明： 【新型所屬之技術領域】 本創作係與汽車排氣管路有關，更詳而言之，尤指使排氣管可藉 由切換不同排氣路徑，以視使用需求產生適當迴壓幫助引擎扭力輸 出、消除排氣擾流及噪音之設計。 【先前技術】 内燃機引擎:K車的作動原理，例如四行程的汽油引擎，其設計是 使活塞上下反覆二次’亦即在引擎回轉二次之間做吸氣、壓縮、膨脹、 排氣四種動作，將汽油、柴油等石化類燃料噴霧混入空氣，藉火星塞 所產生電氣火花來點火，使燃料在汽缸中點燃爆發，以利用膨脹的壓 力轉變為旋轉力帶動輪轴旋轉傳動。 石化燃料在汽缸中點燃後所造成之廢氣則藉由排氣管等裝置，將 其排放至大氣環境中；然而，廢氣排放時所產生之氣體衝擊力量，會 於排氣管内產生衝擊蜂音，因此’會於引擎排氣端處連接—種習用的 排氣管消音結構，其包含有一外管及一穿設過該外管彳内部之内管， 該外管及内管間填充設有消音棉等緩衝材料，且該内管之壁面上設有 複數之消a孔，g廢氣經由排氣管輸送至該内管入口處時，一部分之 氣趙可藉由各消音孔分散至外管及内管間，藉崎低廢氣排放之衝擊 力量，並藉由該緩衝材料產生消音吸震之作用，而經過消音吸震後之 氣體流至制管出口時，會再由各消音孔回流至内管後再__併排出。 再者，排氣過程中所產生的迴壓也關係著引擎輸出能力。過低的 迴壓可能造成燃燒火焰直接衝出排氣門，將排氣氣門燒毁，所以必須 3 M412240 有適度的迴壓來抵擋排氣門開啟時所衝出的火焰，而且迴壓若是過 低’亦會造成引擎扭力輸出衰退的反效果。 然而’上述習用之消音結構其排氣流量固定，所能造成之迴壓也 有限’尤其通常引擎於低轉速時，其需要較高之迴壓來產生高扭力輸 出’容易產生迴壓、扭力不足之情況；而當引擎高速運轉時，單位時 間内排氣量大量增加，習知消音結構排氣流量固定有限，又容易導致 消音結構無法順利排氣，而衍生引擎轉速無法提升之問題。 【新型内容】 综合上開先前技術的缺點，大致上包括習用消音結構之緩衝及消 音效果有限、以及迴壓過低動力輸出不足等缺陷。而鑑於解決上述多 項缺點，本案提出一種排氣管消音結構的方案，該方案於具有可活動 切換控制該引擎排氣端之排氣於一高速排氣管路與一低速排氣管路内 之流動、排氣路徑，藉以產生不同之排氣速度與迴壓，更可藉由一導 流彎管減少排氣流動或切換時擾流與脅音等優點。 本創作一種排氣管消音結構，其係至少包含有： 一外筒，該外筒内係設有一隔板，藉以將該外筒之内部區分為一 緩衝空間及一膨脹氣室； 一高速排氣管路，其係為一貫穿該外筒設置之直通管，該直通管 包含有一連通於一引擎排氣端之入口段、一穿設於緩衝空間内之消音 段及一穿伸於外筒處之排氣段； 一低速排氣管路’其係包含有一設於該緩衝空間内之u型迴壓 管，該U型迴壓管一端係為一連通於該膨脹氣室之緩衝段，另一端係 4 M412240 為一凸伸於該外筒外部之凸伸段； 至少-導流弯管，其係穿設於該直通管之内部，俾以於高速排氣 管路與低速排氣管路間產生導流作用；以及 至少-切換閥，其係、可活動切換控制該引擎排氣端之排氣於該高 速排氣管路與低速排氣管路内之流動、排氣路徑者。 本案達成功效之一，該切換閥可活動切換控制該引擎排氣端之排 氣於該尚速排氣管路與低速排氣管路内之流動、排氣路徑，藉以產生 不同之排氣速度與迴壓’以視引擎之輸出需求調整為高流速或高迴壓 模式者。 本案達成功效之二，藉由該導流彎管之設置，於高速排氣管路與 低速排氣f路間產生導流作用’藉以減少排氣流動時或祕排氣路徑 時之擾流與噪音。 本案達成功效之三，當該切換閥關閉時，可使得高速排氣管路之 氣趙經由導流f管流至低赫氣管路，藉以產生高迴馳丨，而該高 速排氣管路與低速排氣;f糾進—步可藉由該雜氣室之設置，以減 少高迴壓狀態下之氣體衝擊噪音。 【實施方式】 為便於說明本案於上述新型内容一攔中所表示的中心思想，茲以 具趙實施触達。實施例巾各種不同物件係按適於例料明之比例， 而非按實際元件的比例予以繪製’合先敘明。 如第-圖〜第三圖圖面所示，本創作係為一種排氣管消音結構，其 係至少包含有： 5 M412240 一外筒10,該外筒1〇内係設有一隔板11，藉以將該外筒10之内 部區分為—緩衝空間12及一膨脹氣室13,其中，該緩衝空間12内設 有緩衝材料121，該缓衝材料121為消音棉與白鐵絲至少其中一種所 構成； 一高速排氣管路20，其係為一貫穿該外筒1〇設置之直通管21， 該直通管21包含有一連通於一引擎排氣端(圖未示)之入口段211、一 穿設於緩街空間12内之消音段212及一穿伸於外筒1〇處之排氣段 213 ;其中，該直通管21之消音段212上穿設有複數與緩衝空間12 相連通之消音孔214 ; 低速排氣管路30，其係包含有一設於該緩衝空間12内之u型 迴磨管31 ’該u型迴麼管31 —端係為一連通於該膨脹氣室13之緩衝 段311，另一端係為一凸伸於該外筒1〇外部之凸伸段312 ;其中該 U型迴應管31上亦穿設有複數與緩衝帥12相連狀消音孔313 ; 至少-導流弯管40，其係穿設於該直通管21之内部，俾以於高 速排氣管路20與低速排氣管路3〇間產生導流作用；以及 至/切換閥50 ’其係可活動切換控制該引擎排氣端之排氣於該 高速排氣管路20與低速排氣管路3〇内之流動排氣路徑者。 其令，該膨脹氣室13係位於該外筒1〇近排氣段213之一側，且 該導流f管40係設於該消音段212與排氣段213之間以連通於該直 s 1内部與膨脹氣至13間，且該切換閥5〇係設於該排氣段扣 上。 明瞭上述本案詳細結構後， 以下係針對本案之動作原理逐一詳細 6 說明： 排^如麵時，單蝴纖量场^，錢管需提高 來2 快逮排氣時，如第三圖所示，該切換間50係為開啟狀態， 經^ 瞻_入°㈣私崎心，當氣體流 曰& 212 k ’可秸由該等消音孔214將部份氣體分散至緩衝空間 12内，以分散、降低排氣勤，並藉由該緩衝材料121達到吸立減 =功能，而排放之氣體經過消音段212吸音、減震後即可自職段 Z13排出，以達到高速排氣之目的。 如第四圖所示，當引擎於低轉速時，其需要較高之迴壓來產生高 扭力輸出，係可控制該切換閥5Q至關_，其中，%關 閉時’刻擎排氣端之排氣不再直接由排氣段213排出，而是由該入 口 1又211、消音段212經由導流彎管4〇流入膨脹氣室再經由緩 衝段3M流入u型迴壓管31後由凸伸段312排出外筒扣。、、 “由於該切換閥50關閉狀態下’排氣需經由較長之排氣路徑排出， 可藉以達到高迴壓輸出之目的，而該高速排氣管㈣與低速排氣管路 間30進一步可藉由該膨脹氣室13之設置，以減少高迴壓狀態下之氣 體衝擊臂音’再加上消音段212與該u型迴壓管31上皆穿設有複數 與緩衝空間彳2相連通之消音孔214、313，可產生兩次吸音、減震動 作，大幅降低高迴壓狀態下之噪音與振動問題。 如第五圖所示，其係為本創作之另一實施例，其中，該膨服氣室 13係位於該外筒1〇近入口段211之—側，且該凸伸段扣係連接於 該直通官21之入口段211處，該導流彎管4〇係設於該入口段211與 凸伸& 312 Μ，再者’該入口段211與消音段犯間並設有另一導流 彎管41，以連通於該直通管21内部與膨脹氣室13間，且該切換閥5〇 係設於直通管211之兩導流f f 4Q、41間。 如第’、圖所不’當引擎高速運轉時，單位時間内排氣量大量增加， 排氣管需提高排氣流量以快速排氣時，該切換閥5〇係切換為開啟狀 態’來自引轉氣端之聽經鍵人口段…進人直通管Μ内，經由· 切換閥50心〇肖音段212 ’當氣體流經消音段212時可藉由該等消 音孔2^4將雜氣體分散至緩衝空間12内，以分散、降低排氣壓力，φ 並藉由該緩衝材料121達到吸音、減震之功能，而排放之氣體經過消 音段212吸音、減震後即可自排氣段213排出，以達到高速排氣之目 的。 如第七圖所示，當引擎於低轉速時，其需要較高之迴壓來產生高 扭力輸出，係可控制該切換閥5〇至關閉狀態，其中，當該切換闊 關閉時，該引擎排氣端之排氣不再經由入口段211直接流至消音段 212，而是由該入口段211經導流彎管4〇流入凸伸段Μ2、。型迴壓籲 管31、緩衝段311以流至該膨脹氣室13，再經由另—導流彎管41流 回直通％21後’由消音段212與排氣段213排出外筒1〇。 與前-實施例相較下’本實施例之低速排氣管路3〇具有更長之排 氣路徑’可產生更高之迴壓，再加上本實施例設置單—之進氣及排氣 位置，可減少外觀上之差異、降低安裝之難度。 再者，如第八圖及第九圖圖面所示，其係為本創作第三及第四實 施例之剖面示意圖’其中’該消音段212上可為無消音孔之設計以 M412240 適用於不同規格之車種。 雖然本案是以數個最佳實施例做說明，但精於此技藝者能在不脫 離本案精神與範疇下做各種不同形式的改變。以上所舉實施例僅用以 說明本案而已，非用以限制本案之範圍。舉凡不違本案精神所從事的 種種修改或變化，俱屬本案申請專利範圍。 M412240 【圖式簡單說明】 第一圖係本創作之立體外觀示意圖。 第二圖係本創作之立體局部剖面示意圖。 第二圖係本創作切換閥開啟之排氣狀態剖面示意圖。 第四圖係本創作切換閥關閉之排氣狀態剖面示意圖。 第五圖係本創作另一實施例之立體局部剖面示意圖。 第六圖係本創作另一實施例切換閥開啟之排氣狀態剖面示意圖。 第七圖係本創作另一實施例切換閥關閉之排氣狀態剖面示意圖。 第八圖係本創作第三實施例之剖面示意圖。 第九圖係本創作第四實施例之剖面示意圖。 【主要元件符號說明】 外筒10 排氣段213 隔板11 消音孔214 緩衝空間12 低速排氣管路30 膨脹氣室13 U型迴壓管31 緩衝材料121 緩衝段311 高速排氣管路20 凸伸段312 直通管21 消音孔313 入口段211 導流彎管40、41 消音段212 切換閥50M412240 V. New description: [New technology field] This creation department is related to automobile exhaust pipe. In more detail, especially the exhaust pipe can be switched to different exhaust paths to suit the needs of use. Back pressure helps the engine to torque output, eliminate exhaust turbulence and noise design. [Prior Art] Internal combustion engine: The operating principle of the K-car, such as a four-stroke gasoline engine, is designed to make the piston up and down twice, that is, to inhale, compress, expand, and exhaust between the engine's second revolution. The action is to mix petrochemical fuels such as gasoline and diesel into the air, and ignite by the electric spark generated by the spark plug, so that the fuel ignites and bursts in the cylinder, so that the expansion pressure is converted into the rotational force to drive the axle rotation transmission. The exhaust gas caused by the ignition of the fossil fuel in the cylinder is discharged to the atmosphere by means of an exhaust pipe or the like; however, the gas impact force generated when the exhaust gas is discharged generates an impact buzzer in the exhaust pipe. Therefore, it will be connected at the exhaust end of the engine - a conventional exhaust pipe muffling structure, which comprises an outer tube and an inner tube which is inserted through the inner portion of the outer tube, and the outer tube and the inner tube are filled with silencer a cushioning material such as cotton, and a plurality of holes are formed on the wall surface of the inner tube, and when the exhaust gas is delivered to the inlet of the inner tube via the exhaust pipe, a part of the gas can be dispersed to the outer tube by the sound-absorbing holes and Between the inner tubes, the impact force of the low exhaust gas is used, and the buffer material is used to generate the sound-absorbing and shock-absorbing effect. When the gas after the sound-absorbing and shock-absorbing is flown to the outlet of the tube, the sound-absorbing holes are returned to the inner tube. Then __ and discharge. Moreover, the back pressure generated during the exhaust process is also related to the engine output capability. Too low back pressure may cause the combustion flame to directly rush out of the exhaust valve and burn the exhaust valve. Therefore, 3 M412240 must have a moderate back pressure to withstand the flame that is blown when the exhaust valve is opened, and if the back pressure is over Low 'will also cause the counter-effect of engine torque output decline. However, the above-mentioned conventional muffling structure has a fixed exhaust flow rate, and the back pressure can be limited. In particular, when the engine is at a low rotational speed, it requires a high back pressure to generate a high torque output, which is prone to back pressure and insufficient torque. In the case of high-speed operation of the engine, the amount of exhaust gas per unit time increases greatly. The conventional exhaust noise structure has a fixed fixed exhaust flow rate, which is easy to cause the sound-absorbing structure to be exhausted smoothly, and the speed of the derivative engine cannot be improved. [New content] The shortcomings of the prior art are comprehensively summarized, including the buffering and muffling effects of the conventional muffling structure, and the lack of back pressure and low power output. In view of solving the above-mentioned plurality of shortcomings, the present invention proposes a scheme for an exhaust pipe muffling structure, which has an exhaust capable of actively switching and controlling the exhaust end of the engine in a high-speed exhaust line and a low-speed exhaust line. The flow and exhaust paths are used to generate different exhaust speeds and back pressures, and the advantages of exhaust flow or disturbance and disturbance during switching can be reduced by a flow deflector. The present invention relates to an exhaust pipe muffling structure, which comprises at least: an outer cylinder, wherein the outer cylinder is provided with a partition, thereby dividing the inside of the outer cylinder into a buffer space and an expansion chamber; The gas pipeline is a straight through pipe disposed through the outer cylinder, and the straight through pipe includes an inlet section connected to an exhaust end of the engine, a silencing section penetrating in the buffer space, and a through-and-out section a low-speed exhaust line includes a u-shaped pressure return pipe disposed in the buffer space, and one end of the U-shaped return pipe is a buffer section connected to the expansion air chamber The other end of the system 4 M412240 is a protruding section protruding from the outside of the outer cylinder; at least - a flow guiding elbow, which is penetrated inside the straight through tube, for high-speed exhaust pipe and low-speed exhaust a flow guiding relationship between the pipelines; and at least a switching valve that is movable and controls the flow and exhaust paths of the exhaust gas of the exhaust end of the engine in the high-speed exhaust pipeline and the low-speed exhaust pipeline . One of the effects of the present invention is that the switching valve can actively switch to control the flow and exhaust paths of the exhaust gas of the exhaust end of the engine in the idle exhaust line and the low-speed exhaust line, thereby generating different exhaust speeds. And back pressure 'to adjust the output demand of the engine to high flow rate or high back pressure mode. In this case, the second effect is achieved. By the setting of the diversion elbow, a flow guiding action is generated between the high-speed exhaust pipe and the low-speed exhaust f path, so as to reduce the disturbance flow when the exhaust gas flows or the secret exhaust path. noise. In this case, the third effect is achieved. When the switching valve is closed, the gas of the high-speed exhaust line can be flowed through the flow guiding tube to the low-heavy gas line, thereby generating a high-return enthalpy, and the high-speed exhaust line is Low-speed exhaust; f-correction-step can be set by the gas chamber to reduce gas impact noise under high back pressure. [Embodiment] In order to facilitate the explanation of the central idea expressed in the above-mentioned new content, the case is implemented by Zhao. The various articles of the embodiments are drawn according to the proportions which are suitable for the examples, rather than the proportions of the actual components. As shown in the first to third figures, the present invention is an exhaust pipe muffling structure, which comprises at least: 5 M412240, an outer cylinder 10, and a partition 11 in the outer cylinder 1 The interior of the outer cylinder 10 is divided into a buffer space 12 and an expansion chamber 13 , wherein the buffer space 12 is provided with a buffer material 121 , which is composed of at least one of a sound-absorbing cotton and a white iron wire. A high-speed exhaust pipe 20 is a straight-through pipe 21 disposed through the outer casing 1 , and the straight-through pipe 21 includes an inlet section 211 connected to an exhaust end of the engine (not shown). The sound-absorbing section 212 disposed in the slow-street space 12 and the exhaust section 213 extending through the outer cylinder 1 ;; wherein the silencer section 212 of the straight-through pipe 21 is provided with a plurality of buffer spaces 12 The sound-absorbing hole 214; the low-speed exhaust pipe 30 includes a U-shaped honing pipe 31 disposed in the buffer space 12, and the end of the U-shaped pipe 31 is connected to the expansion plenum 13 The other end of the buffer section 311 is a protruding portion 312 protruding from the outer portion of the outer tube 1; wherein the U-shaped response tube 31 is also disposed The plurality of sound-absorbing holes 313 are connected to the buffer 12; at least the flow-guiding pipe 40 is disposed inside the straight-through pipe 21 to generate between the high-speed exhaust pipe 20 and the low-speed exhaust pipe 3 The diversion function; and the / switching valve 50' is movable to control the exhaust gas path of the exhaust end of the engine to the flow exhaust path in the high-speed exhaust line 20 and the low-speed exhaust line 3〇. The expansion plenum 13 is located on one side of the outer cylinder 1 near the exhaust section 213, and the flow guiding tube 40 is disposed between the silencing section 212 and the exhaust section 213 to communicate with the straight s 1 interior and expansion gas to 13, and the switching valve 5 is attached to the exhaust section buckle. After clarifying the detailed structure of the above case, the following is a detailed explanation of the action principle of the case. 6: When the surface is in the same way, the single butterfly volume field ^, the money tube needs to be increased to 2, when the exhaust is fast, as shown in the third figure. The switch room 50 is in an open state, and the gas flow & 212 k ' can be used to disperse part of the gas into the buffer space 12 by the muffler holes 214 Dispersing, reducing the exhaust, and by the buffer material 121 to achieve the suction reduction = function, and the discharged gas through the muffler section 212 sound absorption, shock absorption can be discharged from the self-segment Z13, in order to achieve high-speed exhaust. As shown in the fourth figure, when the engine is at low speed, it needs a higher back pressure to generate a high torque output, which can control the switching valve 5Q to OFF_, where % is off when the engine is exhausted. The exhaust gas is no longer directly discharged from the exhaust section 213, but is flown from the inlet 1 and 211, the muffler section 212 through the flow guiding elbow 4 into the expansion air chamber, and then flows into the u-type pressure return pipe 31 via the buffer section 3M. The extension 312 discharges the outer cylinder buckle. "Because the switching valve 50 is in the closed state, the exhaust gas needs to be discharged through a long exhaust path, so as to achieve a high back pressure output, and the high-speed exhaust pipe (four) and the low-speed exhaust pipe 30 further By the arrangement of the expansion plenum 13 to reduce the gas impact arm sound in the high back pressure state, the silencer section 212 and the u-type pressure return pipe 31 are all connected with a plurality of buffer spaces 彳2. Through the sound-absorbing holes 214, 313, two sound-absorbing and shock-absorbing actions can be generated, and the noise and vibration problems in the high back pressure state are greatly reduced. As shown in the fifth figure, it is another embodiment of the present creation, wherein The expansion air chamber 13 is located at the side of the outer tube 1 near the inlet portion 211, and the protruding portion is fastened to the inlet portion 211 of the through-passage 21, and the flow guiding tube 4 is attached to the The inlet section 211 and the protrusion & 312 Μ, and the inlet section 211 and the silencer section are interposed and another flow guiding elbow 41 is provided to communicate between the inside of the straight tube 21 and the inflation plenum 13 And the switching valve 5 is disposed between the two flow guiding tubes ff 4Q, 41 of the straight through tube 211. When the engine is running at high speed, the displacement is greatly increased per unit time. When the exhaust pipe needs to increase the exhaust flow rate to quickly exhaust, the switching valve 5 is switched to the open state. ...into the straight-through pipe, through the switching valve 50, the heart-shaped section 212', when the gas flows through the silencing section 212, the gas can be dispersed into the buffer space 12 by the silencing holes 2^4 to disperse The exhaust pressure is reduced, φ and the function of sound absorption and shock absorption is achieved by the buffer material 121, and the discharged gas is sound-absorbing and shock-absorbing through the silencing section 212, and can be discharged from the exhaust section 213 to achieve high-speed exhaust. Purpose: As shown in the seventh figure, when the engine is at a low rotation speed, it needs a higher back pressure to generate a high torque output, and the switching valve 5 is controlled to be in a closed state, wherein when the switching is widened, The exhaust of the exhaust end of the engine no longer flows directly to the silencing section 212 via the inlet section 211, but flows into the protruding section 2 through the inlet section 211 through the flow guiding elbow 4, the type of returning pressure pipe 31, buffering The section 311 flows to the expansion plenum 13 and then via the other-guide flow bend 41 After the straight-through %21 is returned, the outer cylinder 1 is discharged by the muffling section 212 and the exhaust section 213. Compared with the previous embodiment, the low-speed exhaust line 3〇 of the present embodiment has a longer exhaust path. Producing a higher back pressure, together with the intake and exhaust positions of the single-setting unit of the present embodiment, can reduce the difference in appearance and reduce the difficulty of installation. Furthermore, as shown in the eighth and ninth drawings The present invention is a schematic cross-sectional view of the third and fourth embodiments of the present invention. The design of the muffling section 212 can be a muff-free hole. The M412240 is suitable for different types of vehicles. Although the case is based on several optimal implementations. For example, the skilled person can make various changes in the form without departing from the spirit and scope of the case. The above embodiments are only used to illustrate the present case and are not intended to limit the scope of the present invention. Any modification or change that is not in violation of the spirit of the case is the scope of patent application in this case. M412240 [Simple description of the diagram] The first diagram is a three-dimensional appearance of the creation. The second figure is a three-dimensional partial cross-sectional view of the present creation. The second figure is a schematic cross-sectional view of the exhaust state of the creation switching valve. The fourth figure is a schematic diagram of the exhaust state of the closed switching valve of the present creation. The fifth drawing is a perspective partial cross-sectional view of another embodiment of the present creation. Fig. 6 is a schematic cross-sectional view showing the exhaust state in which the switching valve is opened in another embodiment of the present invention. Figure 7 is a cross-sectional view showing the exhaust state of the switching valve closed in another embodiment of the present invention. The eighth figure is a schematic cross-sectional view of the third embodiment of the present creation. The ninth drawing is a schematic cross-sectional view of a fourth embodiment of the present creation. [Description of main components] Outer cylinder 10 Exhaust section 213 Partition 11 Silencer 214 Buffer space 12 Low-speed exhaust line 30 Expansion chamber 13 U-type pressure return pipe 31 Buffer material 121 Buffer section 311 High-speed exhaust line 20 Projection section 312 straight pipe 21 silencer hole 313 inlet section 211 guide elbow 40, 41 silencer section 212 switching valve 50