200840934 九、發明說明： 【發明所屬之技術領域】 本發明係一種如裝備於兩輪機車等上之内燃機之排氣淨 化裝置。 【先前技術】 通常’來自裝備於兩輪機車等上之内燃機即引擎之排氣 氣體係排放到大氣中，但在該排氣氣體排出前，希望儘量 淨化排氣氣體。因此，以往在排出從引擎出來之排氣氣體 之排氣管之途中設置觸媒（催化劑），藉由該觸媒進行前述 淨化。 在此，作為藉由前述觸媒進行排氣氣體淨化之習知排氣 淨化裝置，已知如下述者（例如參照專利文獻丨）。 即在藉由该習知技術之排氣淨化裝置中，從排氣管上 游側向下游側於排氣管途中依序配置第i觸媒、第2觸媒、 第3觸媒，同時於排氣管途中，在引擎與第1觸媒間之位置 連接第1 一 —人空氣導入管，在第2觸媒與第3觸媒間之位置 伙第1 一次空氣導入導途中開始經由切換閥連接分支之第2 "—次空氣導入管。 且，在第1 一次空氣導入管藉由從控制器輸出至切換閥 之信號與排氣管連通時，藉由第1、帛2、第3觸媒淨化（氧 又’在第2二次空氣導入管藉由從控制器輸 出至，換閥之信號與排氣管連通時，藉由第1、第2觸媒使 〇x還原同~藉由第3觸媒使CO、THC氧化。 [專利文獻1]特開平5_321653號公報 126704.doc 200840934 【發明内容】 [發明所欲解決之問題] 且說在前述習知技術中，藉由從控制器輸出至切換閥之 馆號使弟2 一次空氣導入管與排氣管連通時，藉由第1、第 2觸媒使排氣氣體中包含之NO還原，同時藉由第3觸媒使 排氣氣體中包含之CO、THC氧化。200840934 IX. Description of the Invention: [Technical Field] The present invention is an exhaust gas purification device such as an internal combustion engine equipped in a two-wheeled vehicle or the like. [Prior Art] Generally, an exhaust system from an internal combustion engine, that is, an engine mounted on a two-wheeled motor vehicle or the like, is discharged to the atmosphere, but it is desirable to purify the exhaust gas as much as possible before the exhaust gas is discharged. Therefore, in the past, a catalyst (catalyst) was provided in the middle of discharging the exhaust pipe from the exhaust gas from the engine, and the catalyst was used for the purification. Here, as a conventional exhaust gas purifying device that performs exhaust gas purification by the above-described catalyst, the following is known (for example, see Patent Document). In the exhaust gas purification device of the prior art, the i-th catalyst, the second catalyst, and the third catalyst are sequentially disposed in the middle of the exhaust pipe from the upstream side of the exhaust pipe to the downstream side. In the middle of the trachea, the first one-person air introduction pipe is connected to the position between the engine and the first catalyst, and the first air introduction guide is started in the first air introduction guide between the second catalyst and the third catalyst. The 2nd "-air inlet tube of the branch. Further, when the first air introduction pipe communicates with the exhaust pipe by the signal output from the controller to the switching valve, the first air filter is cleaned by the first, second, and third catalysts (oxygen is again in the second secondary air). When the introduction tube is output from the controller until the signal of the valve is connected to the exhaust pipe, the first and second catalysts are used to reduce the 〇x and the third catalyst to oxidize the CO and the THC. [Problem to be Solved by the Invention] In the above-mentioned prior art, the air is introduced once by the register number from the controller to the switching valve. When the tube is in communication with the exhaust pipe, the NO contained in the exhaust gas is reduced by the first and second catalysts, and the CO and THC contained in the exhaust gas are oxidized by the third catalyst.
然而，在該習知技術中，在使第2二次空氣導入管與排 氣官連通％，由於該二次空氣之一部分向第2觸媒逆流， 因此第2觸.媒之上游側部位係用於進行N〇等之還原，對此 第2觸媒之下游側部位係用於藉由前述二次空氣進行、 THC等之氧化，但在該習知技術中，由於使第二觸媒擔持 均等之材料，所以存有未考慮用於良好進行^^%、c〇、 THC淨化之合適材料而形成第2觸媒之問題。 々亡發明係鑒於此問題而完成者’係關於一種内燃機之排 氣淨化裝置’其可利用3個觸媒有效地進行排氣氣體中所 含之NOx之還原與c〇、THC之氧化兩方。 [解決問題之技術手段] 為解決前述習知技術之問題點之本發明之内燃機之排氣 淨化裝置’其特徵在於包括：排氣管，其係排出來自内辦 機之㈣氣體；第1觸媒’其係設置於該排氣管之途中， 淨化前述排氣氣體；第2觸媒，其係位於比該第_媒更下 游側，設置於前述排氣瞢 ^ …仫中，淨化從前述第1觸媒所流 二之：氣氣體；第3觸媒’其係位於比該第2觸媒更下游 貝’ 5又置於别述排氣管途中，淨化從前述第2觸媒所流出 I26704.doc 200840934 之排氣氣體；及二次空氣導入管，其係位 與前述第3觸媒之間，設置於前述排氣管途中，用於將二 =空氣導人前述排氣管；前述第2觸媒之上游側部位與下 游側部位擔持具有相異構成之材料。 藉由如此構成之本發明，因為使第2觸媒之上游側部位 據下游側部位擔持具有相異構成之材料，所以可使第㈣ 媒之㈣侧部位擔㈣於使ΝΟχ等還原最佳之還原觸媒，However, in the prior art, when the second secondary air introduction pipe is connected to the exhaust gas, the upstream portion of the second contact medium is partially reversed from the second catalyst. For the reduction of N〇 or the like, the downstream side portion of the second catalyst is used for the oxidation of THC or the like by the secondary air, but in the prior art, the second catalyst is used. Since the materials are equal, there is a problem that the second catalyst is formed without considering suitable materials for good purification of ^^%, c〇, and THC. In view of this problem, the inventor of the invention is based on an exhaust gas purification device for an internal combustion engine, which can efficiently perform the reduction of NOx contained in the exhaust gas and the oxidation of c〇 and THC by using three catalysts. . [Technical means for solving the problem] The exhaust gas purification device of the internal combustion engine of the present invention which solves the problems of the prior art described above is characterized by comprising: an exhaust pipe which discharges (4) gas from the internal machine; the first touch The medium is disposed on the exhaust pipe to purify the exhaust gas; the second catalyst is disposed on the downstream side of the first medium, and is disposed in the exhaust gas, and is purified from the foregoing The first catalyst flows through the gas: the third catalyst is located downstream of the second catalyst, and is placed in the middle of the exhaust pipe, and the purification flows out from the second catalyst. I26704.doc 200840934 exhaust gas; and a secondary air introduction pipe between the system and the third catalyst, disposed in the middle of the exhaust pipe, for guiding the second air to the exhaust pipe; The upstream side portion and the downstream side portion of the second catalyst hold materials having different compositions. According to the present invention as described above, since the upstream side portion of the second catalyst carries the material having a different configuration depending on the downstream side portion, the (four) side portion of the fourth (4) medium can be used to restore the optimum of the ruthenium or the like. Reducing catalyst,
亚^弟2觸媒之上游側部位擔持用於使例如CO、THC等氧 化取k之氧化觸媒。藉此’即使在第2觸媒與第3觸媒之間 ，位置’導入排氣管之二次空氣向上游側逆流，也可藉由 §亥二，空氣與在第2觸媒之下游側部位擔持之氧化觸媒， 使排氣氣體中包含之⑶及THC等良好地氧化。又，可 第1觸媒與在第2觸媒之上游側部位擔持之還原觸媒，㈣ 乳氣體中包含之例如Ν〇χ等良好地還原。 又’在本發明之一樣態中，前述第2觸媒上游側部位可 f持較下游側部位更多比率之姥。藉由如此構成之本發 月可利用於第2觸媒上游側部位擔持之錢使排氣氣體中 所含之Ν〇χ等更有效地還原。 在本發明之一樣態中，前述第2觸媒下游側部位可 擔持較上游側部位更多比率之把。藉由如此構成之本發 明’可利用於第2觸媒下游側部位擔持之减排氣氣體中 所含之C〇、THC等更有效地氧化。 再者’在本發明之一樣態中，在前述排氣管中，可於前 述第1觸媒與前述第2觸媒之間之位置，設置用於向前述排 126704.doc 200840934 氣管導入二次空氣之其他二次空氣導入管。藉由如此構成 之本發明，因為二次空氣在第2觸媒與第3觸媒之間之位置 通過一％空氣導入管導入排氣管之同時，在第1觸媒與第2 觸媒之間之位置通過其他二次空氣導入管導入排氣管，所 以藉由該等第1、第2、第3觸媒可有效地進行C0及THC之 氧化。The upstream side of the arsenic 2 catalyst carries an oxidizing catalyst for oxidizing, for example, CO, THC, or the like. Therefore, even if the secondary air introduced into the exhaust pipe is moved backward to the upstream side between the second catalyst and the third catalyst, the air and the downstream side of the second catalyst can be used. The oxidation catalyst supported at the site oxidizes well (3), THC, and the like contained in the exhaust gas. Further, the first catalyst may be reduced by a reducing catalyst supported on the upstream side of the second catalyst, and (4) containing, for example, ruthenium in the milk gas. Further, in the same state of the present invention, the upstream side portion of the second catalyst can be held at a higher ratio than the downstream side portion. In the present month, the amount of money contained in the exhaust gas can be more effectively reduced by the money carried by the upstream side of the second catalyst. In the same manner as in the present invention, the second catalyst downstream side portion can hold a larger ratio than the upstream side portion. According to the present invention, the C〇, THC, and the like contained in the exhaust gas which is carried by the downstream side of the second catalyst are more effectively oxidized. Further, in the same aspect of the present invention, in the exhaust pipe, a position between the first catalyst and the second catalyst may be provided for introducing the second tube to the row 126704.doc 200840934. Other secondary air introduction tubes for air. According to the invention thus constituted, since the secondary air is introduced into the exhaust pipe through the one-air air introduction pipe at a position between the second catalyst and the third catalyst, the first catalyst and the second catalyst are Since the position between the two is introduced into the exhaust pipe through the other secondary air introduction pipe, the oxidation of C0 and THC can be efficiently performed by the first, second, and third catalysts.
再者，在本發明之一樣態中，可在前述其他二次空氣導 入管中，設置用於控制由該導入管導入至排氣管之二次空 氣之流通之流通控制閥。藉由如此構成之本發明，以流通 控制閥控制從其他二次空氣導入管導入至排氣管之二次空 氣之流通，藉此可藉由前述二次空氣適當地調整以第2觸 媒與第3觸媒使CO及THC氧化之氧化量。 [發明之效果] 藉由本發明之内燃機之排氣淨化裝置，可藉由第丨觸媒 與在第2觸媒之上游側部位擔持之還原觸媒，使排氣氣體 中所：之例如N〇x等良好地還原。又，可藉由在第2觸媒 之下游侧部位擔持之氡化觸媒與第3觸媒，使排氣氣體中 所含之例如C〇、THC良好地氧化。因此，可以利用、3個觸 媒充分淨化排氣氣體中所含之c〇、THC、等排氣成 【實施方式】 參照圖1及圖2說明本發明之實施形態之内燃機之排氣淨 化裝置。本實施形態之内燃機之排氣淨化裝置1例如裝備 於兩輪機車上，包括有引擎1〇、排氣管2〇、第i觸媒％、 126704.doc 200840934 第2觸媒40、第3觸媒50及二次空氣導入管6〇而構成。 引擎_如裝載於兩輪機車上，將來自空氣淨化㈣之 空氣與來_料供給裝置14之燃料混合後供給（噴射）於引 擎10内之氣缸(未圖示)’在引擎内使燃料燃燒而使引擎W 内之活塞（未圖示）驅轉返運動）。再者，在排氣㈣中 較二次空氣導入管60之開口.部更下游側而較第3觸媒50更 上游侧之位置’或後述之消音器12之下游端侧之位置上， 安裝氧感測器（未圖示），來自該氧感測器之輸出信號輸入 到控制器（未圖示）。且，燃料供給裝置14為了從排氣管2〇 排出之排氣氣體成為理想配比(理論空燃比)，基於經由控 制器之來自氧感測器之輸出信號，控制向引擎1〇内供給： 燃料之供給量。 排氣管20之上游端側連接到引擎1〇上。且，排氣管2〇係 將在引擎1〇内燃燒之混合氣（燃料與空氣）之排氣氣體排出 至外部者。該排氣氣體内包含Ν〇χ、c〇、THC等排氣物 質。又’在排氣管20之下游端側裝有將排氣氣體排出外部 時降低排氣音之消音器12。 弟1觸媒3 0係擔持以第i材料即錢為主成分之金屬之還原 觸媒。又’該第1觸媒30安裝於排氣管20内之上游侧，例 如排氣管内。且，第丨觸媒3〇主要係使流通排氣管2〇内之 排氣氣體中所含之ΝΟχ還原。 第2觸媒40中，在第2觸媒之上游侧部位4〇Α與下游側部 位40Β擔持有具有相異構成之材料。具體而言，上游側部 位40Α上擔持有以錢為主成分之金屬，同時下游側部位 126704.doc -10 - 200840934 .上擔持有以鈀為主成分之金屬。即，第2觸媒仂係兼具 通原觸媒與氧化觸媒兩方功能者。又，第2觸媒4〇於比第1 觸媒30更下游侧且消音器12内之位置安裝於排氣管⑼内。 且，第2觸媒40主要以在上游側部位4〇A擔持之錢使流通排 氣官20内之排氣氣體内所含之Ν〇χ還原，同時主要以在下 游側部位40Β擔持之鈀使c〇、tHc氧化。 第3觸媒5 0係擔持以第2材料即鈀為主成分之金屬之氧化 觸媒。又，第3觸媒50於比第2觸媒40更下游侧且消音器12 内之位置安裝於排氣管20内。且，第3觸媒5〇主要使流通 排氣管20内之排氣氣體中所含之c〇、thc氧化。 二次空氣導入管60之上游端侧連接於空氣淨化器丨i上。 又，二次空氣導入管6〇之下游端側於消音器12内且第2觸 媒40與第3觸媒5 0之間之位置連接於排氣管2〇上。且，二 次導入管60將外部空氣從空氣淨化器u經由簧片閥13在第 2觸媒與第3觸媒50之間之位置常時供給給排氣管2〇，促進 第3觸媒5 0之CO、THC之氧化。 藉由如此構成之本實施形態之排氣淨化裝置1，因為係 使弟2觸媒40之上游側部位40A擔持姥的同時，使第2觸媒 40之下游側部位40B擔持鈀之構成，所以可藉由通過二次 空氣導入管60在第2觸媒40與第3觸媒50之間之位置導入至 排氣管20内之二次空氣、在第2觸媒40所擔持之鈀、及在 第3觸媒50所擔持之把，使排氣氣體中所含之c〇及THC充 分氧化。 又，即使在該第2觸媒40與第3觸媒50之間之位置導入至 126704.doc -11- 200840934 排氣管20内之二次空氣向上游側逆流時，也可藉由該二次 空氣與在第2觸媒40所擔持之鈀使CO及THC良好地氧化。 又’可藉由在第1觸媒30所擔持之铑與在第2觸媒4〇所擔持 之錢’使排氣氣體中所含之N〇x良妤地還原。 因此根據本實施之形態，藉由利用3個觸媒3〇、4〇、 5〇，可以充分地淨κΝΟχ、co、THC等，可提高排氣淨化 裝置1之性能、信賴性等。 又’第2觸媒40中，因為使其上游側部位擔持鍺之同 打’使下游側部位擔持鈀，所以可以使第2觸媒4〇適材適 所地擔持姥與鈀，可以削減第2觸媒4〇之成本。 又，根據本實施之形態，因為將還原用觸媒分割成兩個 觸媒30、40，所以可以在引擎1〇啟動時，靠近引擎1〇側之 第1觸媒30在冷機時迅速活性化，隨此可提前其他兩個觸 媒4〇、5〇之活性化。即，第1觸媒3〇可以發揮在還原N0x 之同時提前活化其他兩個觸媒4〇、5〇之預熱功能。藉此， 可以在引擎10啟動後提前開始Ν〇χ2還原與CO及之氧 化，謀求提高排氣氣體三種成分之淨化。 再者，因為將還原用觸媒分割成兩個觸媒3〇、4〇，可使 ^個觸媒3〇、40小型化，所以即使將第1觸媒30配置到排 氣管内時，也可容易地滿足車體之傾斜角度或車體之外觀 等設計要件。 再者，第1觸媒30為了確保其容量，最好不是徑向擴大 而2長度方向擴大以確保必要之容量。這是因為不僅可滿 足則述叹计要件’還可有效地提升流入第2、第3觸媒、 126704.doc -12- 200840934 50中之排氣氣體之溫度，更早地活化觸媒3〇、4〇、5〇。 其次’圖3係表示本發明之第2實施形態。又，在本實施 开乂悲中’於與第1實施形態相同之構成要素附上相同之符 號，省略其說明。 本灵施形態之内燃機之排氣淨化裝置60包含有引擎（未 圖不）、排氣官20、第1觸媒3〇、第2觸媒7〇、第3觸媒5〇及 二次空氣導入管80而構成。 在此第2觸媒70與第1實施形態中所述之第2觸媒4〇同Further, in the same aspect of the invention, a flow control valve for controlling the flow of the secondary air introduced into the exhaust pipe by the introduction pipe may be provided in the other secondary air introduction pipe. According to the present invention thus constituted, the circulation control valve controls the flow of the secondary air introduced into the exhaust pipe from the other secondary air introduction pipe, whereby the second catalyst can be appropriately adjusted by the secondary air. The amount of oxidation of the third catalyst to oxidize CO and THC. [Effect of the Invention] According to the exhaust gas purification device of the internal combustion engine of the present invention, the catalyst can be made of, for example, N in the exhaust gas by the third catalyst and the reduction catalyst supported on the upstream side of the second catalyst. 〇x, etc. are well restored. Further, for example, C氡 and THC contained in the exhaust gas can be favorably oxidized by the deuteration catalyst and the third catalyst supported on the downstream side of the second catalyst. Therefore, it is possible to sufficiently purify the exhaust gas such as c〇, THC, and the like contained in the exhaust gas by using three catalysts. [Embodiment] An exhaust gas purification device for an internal combustion engine according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2 . . The exhaust gas purification device 1 of the internal combustion engine of the present embodiment is equipped, for example, on a two-wheeled motor vehicle, and includes an engine 1〇, an exhaust pipe 2〇, an i-th catalyst%, 126704.doc 200840934 a second catalyst 40, and a third touch. The medium 50 and the secondary air introduction pipe 6 are configured. The engine _ is loaded on a two-wheeled vehicle, and the air from the air purification (4) is mixed with the fuel of the material supply device 14 and supplied (injected) into a cylinder (not shown) in the engine 10 to burn the fuel in the engine. The piston (not shown) in the engine W is driven back to the movement). Further, in the exhaust gas (four), the position closer to the upstream side of the opening portion of the secondary air introduction pipe 60 and the upstream side of the third catalyst 50 or the downstream end side of the muffler 12 to be described later is mounted. An oxygen sensor (not shown) inputs an output signal from the oxygen sensor to a controller (not shown). Further, the fuel supply device 14 controls the supply of the exhaust gas from the exhaust pipe 2 to a stoichiometric ratio (theoretical air-fuel ratio) based on the output signal from the oxygen sensor via the controller: The amount of fuel supplied. The upstream end side of the exhaust pipe 20 is connected to the engine 1A. Further, the exhaust pipe 2 exhausts the exhaust gas of the mixed gas (fuel and air) combusted in the engine 1 to the outside. The exhaust gas contains exhaust materials such as helium, c〇, and THC. Further, on the downstream end side of the exhaust pipe 20, a muffler 12 for reducing the exhaust sound when the exhaust gas is discharged to the outside is mounted. The Brother 1 Catalyst 3 0 is a reducing catalyst for a metal containing the i-th material, that is, money as a main component. Further, the first catalyst 30 is attached to the upstream side of the inside of the exhaust pipe 20, for example, in the exhaust pipe. Further, the third catalyst 3 is mainly used to reduce the enthalpy contained in the exhaust gas flowing through the exhaust pipe 2〇. In the second catalyst 40, the upstream side portion 4 of the second catalyst and the downstream side portion 40 are provided with materials having different compositions. Specifically, the upstream side portion 40 has a metal containing money as a main component, and the downstream side portion is 126704.doc -10 - 200840934. The metal is mainly composed of palladium. In other words, the second catalyst system has both the function of the original catalyst and the oxidation catalyst. Further, the second catalyst 4 is attached to the exhaust pipe (9) at a position further downstream than the first catalyst 30 and at a position inside the muffler 12. In addition, the second catalyst 40 mainly reduces the enthalpy contained in the exhaust gas in the exhaust gas exhaustor 20 by the money carried in the upstream side portion 4A, and mainly supports the downstream side portion 40Β. The palladium oxidizes c〇 and tHc. The third catalyst 50 is an oxidation catalyst for a metal containing palladium as a second material. Further, the third catalyst 50 is attached to the exhaust pipe 20 at a position further downstream than the second catalyst 40 and at a position inside the muffler 12. Further, the third catalyst 5 〇 mainly oxidizes c 〇 and th c contained in the exhaust gas flowing through the exhaust pipe 20 . The upstream end side of the secondary air introduction pipe 60 is connected to the air cleaner 丨i. Further, the downstream end side of the secondary air introducing pipe 6 is connected to the inside of the muffler 12 at a position between the second catalyst 40 and the third catalyst 50, and is connected to the exhaust pipe 2''. Further, the secondary introduction pipe 60 supplies the external air from the air cleaner u to the exhaust pipe 2〇 at a position between the second catalyst and the third catalyst 50 via the reed valve 13 to promote the third catalyst 5 Oxidation of CO and THC of 0. In the exhaust gas purification device 1 of the present embodiment configured as described above, the upstream side portion 40A of the second catalyst 40 is supported by the crucible, and the downstream side portion 40B of the second catalyst 40 is supported by palladium. Therefore, the secondary air introduced into the exhaust pipe 20 at the position between the second catalyst 40 and the third catalyst 50 through the secondary air introduction pipe 60 can be carried by the second catalyst 40. Palladium and the third catalyst 50 are used to sufficiently oxidize c〇 and THC contained in the exhaust gas. Further, even when the secondary air introduced into the 126704.doc -11-200840934 exhaust pipe 20 is reversely flowed to the upstream side at a position between the second catalyst 40 and the third catalyst 50, the second The secondary air and the palladium supported on the second catalyst 40 oxidize CO and THC favorably. Further, the N 〇 x contained in the exhaust gas can be reduced by the enthalpy carried by the first catalyst 30 and the money carried by the second catalyst 4 。. Therefore, according to the embodiment, the three catalysts 3〇, 4〇, and 5〇 can sufficiently clean the κ, co, THC, etc., and the performance and reliability of the exhaust gas purification device 1 can be improved. In the second catalyst 40, since the upstream side portion is supported by the same type, the palladium is supported on the downstream side portion, so that the second catalyst 4 can be suitably supported by palladium and palladium. The cost of the second catalyst 4〇. Moreover, according to the embodiment of the present invention, since the reducing catalyst is divided into the two catalysts 30 and 40, the first catalyst 30 close to the side of the engine 1 can be quickly activated when the engine is started. With this, the activation of the other two catalysts 4〇, 5〇 can be advanced. In other words, the first catalyst 3〇 can exhibit a preheating function of activating the other two catalysts 4〇 and 5〇 in advance while reducing N0x. Thereby, the reduction of Ν〇χ2 and the oxidation of CO and the oxidation can be started in advance of the start of the engine 10, and the purification of the three components of the exhaust gas can be improved. In addition, since the reduction catalyst is divided into two catalysts 3〇 and 4〇, the catalysts 3〇 and 40 can be miniaturized. Therefore, even when the first catalyst 30 is placed in the exhaust pipe, It can easily meet the design requirements such as the tilt angle of the car body or the appearance of the car body. Further, in order to secure the capacity, the first catalyst 30 preferably does not expand in the radial direction and expands in the longitudinal direction to ensure the necessary capacity. This is because not only the content of the sighing requirement can be satisfied, but also the temperature of the exhaust gas flowing into the second and third catalysts, 126704.doc -12-200840934 50 can be effectively increased, and the catalyst 3 活化 is activated earlier. 4〇, 5〇. Next, Fig. 3 shows a second embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted. The exhaust gas purification device 60 of the internal combustion engine of the present embodiment includes an engine (not shown), an exhaust gas 20, a first catalyst 3, a second catalyst 7, a third catalyst 5, and a secondary air. The introduction tube 80 is constructed. Here, the second catalyst 70 is the same as the second catalyst 4 described in the first embodiment.
樣、，其上游側部位70A上擔持以鍺為主成分之金屬，同時 下游側部位70B上擔持以鈀為主成分之金屬。然而，該第2 觸媒70於比>肖音器12更上游側安裝於排氣管別内，這一點 與第1實施之形態者不同。又，二次空氣導入管8〇在第2觸 媒7〇與第3觸媒50之間之位置連接於排氣管2〇上。 如此構成之本實施形態中，藉由利用3個觸媒3〇、7〇及 t除^、THC外對叫也可充分地淨化，亦可收到與第 1只施形態幾乎同樣之作用效果。 其次’圖4係表示本發明之第3實旆 ^ ^ 罘軛形恶。又，在本實施 形恶中，於與第i實施形態相 之構成要素附上相同之符 諕，爷略其說明。 巴令、有引擎(去 圖示）、排氣管20、第1觸媒3〇、第 昂Z觸媒1〇〇、第3鱷拔π 及二次空氣導入管110而構成。 弟3觸媒50 在此，第2觸媒100與第1實施形態中 樣，其上游侧部位賴上擔持以鍺 弟2觸媒40同 為主成为之金屬，同時 126704.doc -13· 200840934 下游側部位100B上擔持以la為主成分之金屬。然而，該第 2觸媒100於比消音器12更上游侧安裝於排氣管20内，這一 點與第1實施之形態者不同。 又，二次空氣導入管110與第1實施形態之二次空氣導入 管60同樣，在第2觸媒100與第3觸媒50之間之位置連接於 排氣管20上。然而，該二次空氣導入管no於比消音器12 更上游側連接於排氣管20上，這一點與第1實施之形態者 不同。因此，對排氣管20可以不經由消音器12加溫而直接 供給冷二次空氣，可提高二次空氣之氧濃度，並可提高第 3觸媒50之CO、THC之燃燒效率（氧化效率）。 如此構成之本實施形態中，藉由利用3個觸媒30、1〇〇及 50，除CO、THC外對NOx&可充分地淨化，亦可收到與第 1實施形態幾乎同樣之作用效果· 其次，圖5係表示本發明之第4實施形態。又，在本實施 形態中，於與第1實施形態相同之構成要素附上相同之符 號，省略其說明。 本實施形態之内燃機之排氣淨化裝置12〇與第丨實施形態 一樣，包含有引擎（未圖示）、排氣管2〇、第丨觸媒3〇、第2 觸媒40、第3觸媒50及作為第}二次空氣導入管之二次空氣 導入管60而構成。 ’在第2觸媒40與In the upstream side portion 70A, a metal containing ruthenium as a main component is supported, and a metal having palladium as a main component is supported on the downstream side portion 70B. However, the second catalyst 70 is attached to the exhaust pipe on the upstream side of the > phonograph 12, which is different from the first embodiment. Further, the secondary air introducing pipe 8 is connected to the exhaust pipe 2A at a position between the second catalyst 7A and the third catalyst 50. In the present embodiment configured as described above, it is possible to sufficiently purify the call by using three catalysts 3〇, 7〇, t, and THC, and it is possible to receive almost the same effect as the first embodiment. . Next, Fig. 4 shows the third embodiment of the present invention. Further, in the present embodiment, the same components as those of the i-th embodiment are denoted by the same symbols, and the description thereof will be omitted. The Argentinian has an engine (not shown), an exhaust pipe 20, a first catalyst 3〇, a first Z catalyst 1〇〇, a third crocodile π, and a secondary air introduction pipe 110. In the second embodiment, the second catalyst 100 is in the first embodiment, and the upstream side portion is supported by the metal which is mainly composed of the scorpion 2 catalyst 40, and 126704.doc -13· 200840934 A metal containing la as a main component is carried on the downstream side portion 100B. However, the second catalyst 100 is attached to the exhaust pipe 20 on the upstream side of the muffler 12, which is different from the first embodiment. In the same manner as the secondary air introduction pipe 60 of the first embodiment, the secondary air introduction pipe 110 is connected to the exhaust pipe 20 at a position between the second catalyst 100 and the third catalyst 50. However, this secondary air introduction pipe no is connected to the exhaust pipe 20 on the upstream side of the muffler 12, which is different from the first embodiment. Therefore, the exhaust pipe 20 can directly supply the cold secondary air without heating through the muffler 12, thereby increasing the oxygen concentration of the secondary air, and improving the combustion efficiency of the CO and THC of the third catalyst 50 (oxidation efficiency) ). In the present embodiment, the NOx & can be sufficiently purified in addition to CO and THC by using the three catalysts 30, 1 and 50, and almost the same effects as those of the first embodiment can be obtained. Next, Fig. 5 shows a fourth embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted. The exhaust gas purification device 12 of the internal combustion engine of the present embodiment includes an engine (not shown), an exhaust pipe 2, a third catalyst 3, a second catalyst 40, and a third contact, as in the third embodiment. The medium 50 and the secondary air introduction pipe 60 as the second secondary air introduction pipe are configured. ‘In the second catalyst 40 and
管20上，這 20上，這一點與第1實施之形態者不同。 然而，本實施形態之排氣淨化裝置120 第3觸媒50之間且在消音器12内之位置， 126704.doc 14 200840934 在此，為了流通排氣管2〇内之排氣氣體成為理想配比 (理論空燃比），而在第2二次空氣導入管13〇之途中，設置 依據來自控制器（未圖示）之輸出信號控制開關之流通控制 閥即黃片閥14 0。 因此，當希望比CO、THC之氧化更強化凡0><之還原的設 定時，可藉由依據來自控制器之輸出信號來關閉簧片閥 140，以阻斷從二次空氣導入管13〇向排氣管⑼内流通之二 次空氣，藉由在第i觸媒3〇擔持之铑與在第2觸媒4〇之上游 側部位40A擔持之铑，主要良好地進行Ν〇χ之還原。 又，當希望比ΝΟχ之還原更強化c〇、THC之氧化的設定 日守可藉由依據來自控制器之輸出信號來打開簣片閥 140，以在排氣官2〇内流通來自二次空氣導入管之二次 空氣，使第2觸媒40主要用於C0、THC之氧化。又，此時 口為可以利用2個二次空氣導入管6〇、13〇將二次空氣導入 至排氣管20内，所以可謀求導人至排氣管2()内之二次空氣 之流量的增加，可使C0、THC更有效地氧化。 如此構成之本實施形態中，藉由利用3個觸媒3〇、4〇及 除CO THC外對ΝΟχ也可充分地淨化，亦可收到與第 1實施形態幾乎同樣之作用效果。 其次，圖6係表示本發明之第5實施形態。又，在本實施 形〜、中於與第1實施形態相同之構成要素附上相同之符 號，省略其說明。 本實施形態之内燃機之排氣淨化裝置15〇與第1施形態 樣0 S有引擎（未圖示）、排氣管20、第1觸媒3〇、第2 126704.doc -15· 200840934 觸媒40、第3觸媒50及作為第1二次空氣導入管之二次空氣 導入管60而構成。 然而，本實施形態之排氣淨化裝置15〇在第2觸媒4〇與第 3觸媒50之間且在比消音器12更上游側之位置，作為第2二 次空氣V入管之其他一次空氣導入管〗之下游端側連接 於排氣管20，這一點與第1實施之形態者不同。且，在第2 二次空氣導入管160之途中，與第4實施形態同樣，設置有 依據來自控制益（未圖示）之輸出信號控制開關之流量調整 閥即簧片閥170。 如此構成之本實施形態，也可收到與第4實施形態幾乎 同樣之作用效果。 其次’圖7係表示本發明之第6實施形態。又，在本實施 形悲中’於與第1實施形態相同之構成要素附上相同之符 號，省略其說明。 本實施形態之内燃機之排氣淨化裝置丨8〇包含有引擎（未 圖示）、排氣管20、第1觸媒30、第2觸媒40、第3觸媒50、 作為第1二次空氣導入管之二次空氣導入管19〇及作為第2 二次空氣導入管之其他二次空氣導入管2〇〇而構成。 在此’一次空氣導入管190在第2觸媒40與第3觸媒5〇之 間且在比消音器12更上游側之位置，連接於排氣管2 〇上。 且，在二次空氣導入管190之途中連接有簧片閥21〇。 又，二次空氣導入管200在第2觸媒40與第3觸媒5〇之間 之位置，連接於排氣管20上。且，在二次空氣導入管2〇〇 之途中，設置有依據來自控制器（未圖示）之輸出信號而開 126704.doc •16- 200840934 關之流通調整閥即簧片閥220。 如此構成之本實施形態，也可收到與第4實施形態幾乎 同樣之作用效果。 其次’圖8係表示本發明之第7實施形態。又，在本實施 形態中’於與第丨實施形態相同之構成要素附上相同之符 號，省略其說明。 本實施形態之内燃機之排氣淨化裝置230包含有引擎（未 圖示）、排氣管20、第1觸媒30、第2觸媒240、第3觸媒 50、作為第1二次空氣導入管之二次空氣導入管6〇及作為 第2二次空氣導入管之其他二次空氣導入管250而構成。 且’第2觸媒240在其上游側部位240 A上擔持以铑為主成分 之金屬’同時在其下游側部位240B上擔持以把為主成分之 金屬。 在此，第2觸媒240在比消音器12更上游側之位置，安裝 於排氣管20上。又，二次空氣導入管25〇在第【觸媒3〇與第 2觸媒240之間之位置連接於排氣管2〇上。且，在該二次空 氣導入管250之途中設置有依據來自控制器（未圖示）之輸出 信號而開關之流通控制閥即簣片閥260。 如此構成之本實施形態，也可收到與第4實施形態幾乎 同樣之作用效果。 再者’第1實施形態中，列舉將排氣管2〇設定為與第j觸 媒3 0及第2觸媒40同徑時為例而加以說明，但本發明不限 於此，例如如圖9所示之變形例，將排氣管2〇A形成為比收 容於消音器12内之第2觸媒40及第3觸媒50A更小徑亦可。 126704.doc -17- 200840934 又’在第4實施形態中，列舉使用流通、阻斷二次空氣 之開關閥作為流通控制閥時為例而加以說明，但本發明不 限於此’例如也可使用用於可變地調整二次空氣流量之流 里調ι閥。此在第5、第6、第7實施形態也一樣。 - 【圖式簡單說明】 ， 圖1係表示本發明之第1實施形態之内燃機之排氣淨化裝 置之全體圖。 圖2係表示圖1中排氣管，第1、第2、第3觸媒等之要部 擴大圖。 圖3係表示本發明之第2實施形態之内燃機之排氣淨化裝 置之排氣管，第1、第2、第3觸媒等之圖。 圖4係表示本發明之第3實施形態之内燃機之排氣淨化裝 置之排氣管，第1、第2、第3觸媒等之圖。 圖5係表示本發明之第4實施形態之内燃機之排氣淨化裝 置之排氣管，第1、第2、第3觸媒等之圖。 φ 圖6係表示本發明之第5實施形態之内燃機之排氣淨化裝 置之排氣管，第1、第2、第3觸媒等之圖。 圖7係表示本發明之第6實施形態之内燃機之排氣淨化裝 . 置之排氣管，第1、第2、第3觸媒等之圖。 - 圖8係表示本發明之第7實施形態之内燃機之排氣淨化裝 置之排氣管，第1、第2、第3觸媒等之圖。 圖9係表示基於本發明之變形例之内燃機之排氣淨化裝 置之排氣管，第1、第2、第3觸媒等之圖。 【主要元件符號說明】 126704.doc •18- 200840934 1，60, 90, 120, 230 排氣淨化裝置 13, 210 簧片閥 20, 20A 排氣管 30 第1觸媒 40, 70, 100, 240 第2觸媒 40A，70A，100A，240A 上游側部位 40B, 70B，100B, 240B 下游侧部位 50, 50A 第3觸媒 60, 80, 110, 190 二次空氣導入管 130, 160, 200, 250 其他二次空氣導入管 140, 170, 220, 260 簧片閥（流通控制閥） 126704.doc -19-On the tube 20, this is different from the first embodiment. However, in the exhaust gas purifying device 120 of the present embodiment, the position between the third catalysts 50 and the inside of the muffler 12 is 126704.doc 14 200840934 Here, the exhaust gas in the exhaust pipe 2 is ideally distributed. The ratio (theoretical air-fuel ratio) is set to a yellow plate valve 140 which is a flow control valve for controlling the switch in accordance with an output signal from a controller (not shown) in the middle of the second secondary air introduction pipe 13A. Therefore, when it is desired to strengthen the setting of the reduction of 0 <0> more than the oxidation of CO and THC, the reed valve 140 can be closed by the output signal from the controller to block the secondary air introduction tube 13 The secondary air that has flowed into the exhaust pipe (9) is mainly carried out after being carried by the ith catalyst 3 and the upstream side portion 40A of the second catalyst 4A. Restore it. Moreover, when it is desired to strengthen the c〇 and THC oxidation more than the reduction of ΝΟχ, the defensive valve can be opened by the output signal from the controller to circulate the secondary air in the exhaust gas The secondary air is introduced into the tube, so that the second catalyst 40 is mainly used for the oxidation of C0 and THC. Further, at this time, the secondary air can be introduced into the exhaust pipe 20 by the two secondary air introduction pipes 6A and 13B, so that the secondary air in the exhaust pipe 2 () can be guided. The increase in flow rate allows C0 and THC to oxidize more efficiently. In the present embodiment configured as described above, it is possible to sufficiently purify the crucible by using three catalysts 3, 4, and CO THC, and it is possible to receive almost the same operational effects as those of the first embodiment. Next, Fig. 6 shows a fifth embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted. The exhaust gas purification device 15 of the internal combustion engine of the present embodiment has an engine (not shown), an exhaust pipe 20, a first catalyst 3〇, and a second 126704.doc -15· 200840934 The medium 40, the third catalyst 50, and the secondary air introduction tube 60 as the first secondary air introduction tube are configured. However, the exhaust gas purifying device 15 of the present embodiment is located between the second catalyst 4A and the third catalyst 50 at a position further upstream than the muffler 12, and is used as the second secondary air V inlet tube. The downstream end side of the air introduction pipe is connected to the exhaust pipe 20, which is different from the first embodiment. Further, in the middle of the second secondary air introducing pipe 160, a reed valve 170 which is a flow regulating valve for controlling the switch based on an output signal from a control (not shown) is provided in the same manner as in the fourth embodiment. In the present embodiment configured as described above, almost the same operational effects as those of the fourth embodiment can be obtained. Next, Fig. 7 shows a sixth embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted. The exhaust gas purification device 丨8〇 of the internal combustion engine of the present embodiment includes an engine (not shown), an exhaust pipe 20, a first catalyst 30, a second catalyst 40, and a third catalyst 50 as the first time The secondary air introduction pipe 19 of the air introduction pipe and the other secondary air introduction pipe 2 of the second secondary air introduction pipe are configured. Here, the primary air introduction pipe 190 is connected to the exhaust pipe 2 at a position upstream of the muffler 12 between the second catalyst 40 and the third catalyst 5A. Further, a reed valve 21 is connected to the secondary air introduction pipe 190. Further, the secondary air introducing pipe 200 is connected to the exhaust pipe 20 at a position between the second catalyst 40 and the third catalyst 5A. Further, on the way of the secondary air introducing pipe 2, a reed valve 220, which is a flow regulating valve that opens 126704.doc • 16-200840934, according to an output signal from a controller (not shown) is provided. In the present embodiment configured as described above, almost the same operational effects as those of the fourth embodiment can be obtained. Next, Fig. 8 shows a seventh embodiment of the present invention. In the present embodiment, the same components as those in the third embodiment are denoted by the same reference numerals, and their description will be omitted. The exhaust gas purification device 230 of the internal combustion engine of the present embodiment includes an engine (not shown), an exhaust pipe 20, a first catalyst 30, a second catalyst 240, and a third catalyst 50, and is introduced as a first secondary air. The secondary air introduction pipe 6 of the pipe and the other secondary air introduction pipe 250 as the second secondary air introduction pipe are configured. Further, the second catalyst 240 carries a metal having ruthenium as a main component on the upstream side portion 240A while holding a metal as a main component on the downstream side portion 240B. Here, the second catalyst 240 is attached to the exhaust pipe 20 at a position further upstream than the muffler 12. Further, the secondary air introduction pipe 25 is connected to the exhaust pipe 2 at a position between the first catalyst 3 and the second catalyst 240. Further, a diaphragm valve 260, which is a flow control valve that is opened and closed in accordance with an output signal from a controller (not shown), is provided in the middle of the secondary air introduction pipe 250. In the present embodiment configured as described above, almost the same operational effects as those of the fourth embodiment can be obtained. In the first embodiment, the exhaust pipe 2 is set to have the same diameter as the j-th catalyst 30 and the second catalyst 40. However, the present invention is not limited thereto, for example, as shown in the drawing. In the modification shown in FIG. 9, the exhaust pipe 2A may be formed to have a smaller diameter than the second catalyst 40 and the third catalyst 50A housed in the muffler 12. 126704.doc -17-200840934 In the fourth embodiment, an example in which an on-off valve for circulating and blocking secondary air is used as a flow control valve will be described as an example. However, the present invention is not limited thereto, and for example, A flow regulating valve for variably adjusting the secondary air flow. This is also the same in the fifth, sixth, and seventh embodiments. [Brief Description of the Drawings] Fig. 1 is a view showing a whole of an exhaust gas purifying apparatus for an internal combustion engine according to a first embodiment of the present invention. Fig. 2 is a view showing an enlarged view of essential parts of the first, second, and third catalysts of the exhaust pipe of Fig. 1. Fig. 3 is a view showing the exhaust pipe of the exhaust gas purification device of the internal combustion engine according to the second embodiment of the present invention, the first, second, and third catalysts. Fig. 4 is a view showing an exhaust pipe of an exhaust gas purification device for an internal combustion engine according to a third embodiment of the present invention, first, second, and third catalysts. Fig. 5 is a view showing an exhaust pipe of an exhaust gas purification device for an internal combustion engine according to a fourth embodiment of the present invention, first, second, and third catalysts. φ Fig. 6 is a view showing an exhaust pipe of the exhaust gas purification device of the internal combustion engine according to the fifth embodiment of the present invention, first, second, and third catalysts. Fig. 7 is a view showing the exhaust pipe, the first, second, third catalysts and the like of the exhaust gas purification device of the internal combustion engine according to the sixth embodiment of the present invention. - Fig. 8 is a view showing an exhaust pipe of the exhaust gas purification device of the internal combustion engine according to the seventh embodiment of the present invention, first, second, and third catalysts. Fig. 9 is a view showing an exhaust pipe of an exhaust gas purifying apparatus for an internal combustion engine according to a modification of the present invention, first, second, and third catalysts. [Explanation of main component symbols] 126704.doc •18- 200840934 1,60, 90, 120, 230 Exhaust gas purification device 13, 210 Reed valve 20, 20A Exhaust pipe 30 1st catalyst 40, 70, 100, 240 Second catalyst 40A, 70A, 100A, 240A upstream side portion 40B, 70B, 100B, 240B downstream side portion 50, 50A third catalyst 60, 80, 110, 190 secondary air introduction tube 130, 160, 200, 250 Other secondary air inlet pipes 140, 170, 220, 260 reed valves (circulation control valves) 126704.doc -19-