JP5058050B2 - Exhaust device for internal combustion engine - Google Patents

Exhaust device for internal combustion engine Download PDF

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JP5058050B2
JP5058050B2 JP2008102160A JP2008102160A JP5058050B2 JP 5058050 B2 JP5058050 B2 JP 5058050B2 JP 2008102160 A JP2008102160 A JP 2008102160A JP 2008102160 A JP2008102160 A JP 2008102160A JP 5058050 B2 JP5058050 B2 JP 5058050B2
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valve member
flow path
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valve
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JP2009250185A (en
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周一 長谷
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Sango Co Ltd
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Description

本発明は、内燃機関の排気装置に関し、特に内燃機関に接続される排気流路を構成し排気処理装置を介装するメイン流路と、このメイン流路に両端を連通接続し排気処理装置を迂回するバイパス流路とを備えた排気装置に係る。   The present invention relates to an exhaust device for an internal combustion engine, and more particularly to a main flow path that constitutes an exhaust flow path connected to the internal combustion engine and interposes the exhaust treatment apparatus, and the exhaust treatment apparatus is connected to both ends of the main flow path. The present invention relates to an exhaust device including a bypass flow path that bypasses.

内燃機関の排気装置に関しては、冷機時、即ち内燃機関始動直後の暖機過程における触媒早期活性化によるＨＣ・ＮＯｘ等の排出最少化を図るため、排気処理装置としてスタート触媒コンバータ（プリコンバータ）をエキゾーストマニホールド直下のメイン流路に設けると共に、暖機後はこれを迂回させるべくバイパス流路を設け、弁機構によって両流路を切り換える装置が知られている。例えば、特許文献１には、排気処理装置を介装するメイン流路と、排気処理装置を迂回するバイパス流路とを備えた内燃機関の排気装置において、単一の弁部材によってメイン流路とバイパス流路との間の流路切換を行うと共に各々の流路面積調整を適切に行い得る排気装置が提案されている。   Regarding the exhaust system of an internal combustion engine, a start catalytic converter (pre-converter) is used as an exhaust treatment apparatus in order to minimize emission of HC, NOx and the like by early activation of the catalyst in the warm-up process immediately after the start of the internal combustion engine. There is known a device that is provided in a main flow path directly below the exhaust manifold, and that is provided with a bypass flow path to bypass the main flow path after warm-up and switches both flow paths by a valve mechanism. For example, Patent Document 1 discloses an internal combustion engine exhaust system that includes a main flow path that interposes an exhaust treatment apparatus and a bypass flow path that bypasses the exhaust treatment apparatus. There has been proposed an exhaust device capable of switching the flow path to and from the bypass flow path and appropriately adjusting each flow path area.

上記の排気装置によれば、排気処理装置の上流側及び下流側の一方に配設する単一の弁部材によって、メイン流路及びバイパス流路の一方の連通を選択した状態で、該一方の流路の流路面積を任意且つ連続的に設定することができ、従って、メイン流路とバイパス流路との間の流路切換を行うと共に各々の流路面積調整を適切に行うことができる旨記載されている。   According to the exhaust device described above, in a state where one communication of the main flow path and the bypass flow path is selected by a single valve member disposed on one of the upstream side and the downstream side of the exhaust treatment apparatus, The flow channel area of the flow channel can be set arbitrarily and continuously. Therefore, the flow channel switching between the main flow channel and the bypass flow channel can be performed and each flow channel area can be adjusted appropriately. It is stated.

国際公開ＷＯ２００６／００６３８５号公報International Publication WO2006 / 006385

上記の排気装置によれば、特許文献１に対する従前の排気装置に対し、スペース、コスト、重量、背圧低減効果等において有利となり、内燃機関の冷機時から暖機後まで一貫して、内燃機関の出力要件、排気処理装置による排気処理要件、及び内燃機関の排気に対する消音要件の全てに適切に対応することができる。   According to the above exhaust device, it is advantageous in terms of space, cost, weight, back pressure reduction effect and the like over the conventional exhaust device with respect to Patent Document 1, and the internal combustion engine is consistently from cold to warm up. It is possible to appropriately meet all of the output requirements, the exhaust treatment requirements by the exhaust treatment device, and the silencing requirements for the exhaust of the internal combustion engine.

然し乍ら、特許文献１に記載の装置においては、単一の弁部材によってメイン流路とバイパス流路との間の流路切換を行うと共に各々の流路面積調整を行うこととしているので、弁部材との間で流路面積調整を行う流路内面は、高精度の曲面とすることが要請され、３次元の曲面切削加工等による製造工程の複雑化やコストアップが懸念される。   However, in the apparatus described in Patent Document 1, since the flow path switching between the main flow path and the bypass flow path is performed by a single valve member and each flow path area is adjusted, the valve member The inner surface of the flow channel that adjusts the flow channel area is required to be a highly accurate curved surface, and there is a concern that the manufacturing process may be complicated and costly due to three-dimensional curved surface cutting or the like.

そこで、本発明は、排気処理装置を介装するメイン流路と、排気処理装置を迂回するバイパス流路と、各々の流路面積調整を行う弁装置を備えた内燃機関の排気装置において、簡単且つ安価な弁装置によってメイン流路とバイパス流路との間の流路切換を行うと共に各々の流路面積調整を適切に行い得る排気装置を提供することを課題とする。   Accordingly, the present invention provides an exhaust system for an internal combustion engine that includes a main flow path that interposes an exhaust treatment apparatus, a bypass flow path that bypasses the exhaust treatment apparatus, and a valve device that adjusts the area of each flow path. It is another object of the present invention to provide an exhaust device capable of switching the flow path between the main flow path and the bypass flow path with an inexpensive valve device and appropriately adjusting each flow path area.

上記課題を解決するため、本発明は、請求項１に記載のように、内燃機関に接続される排気流路を構成し排気処理装置を介装するメイン流路と、該メイン流路に両端を連通接続し前記排気処理装置を迂回するバイパス流路と、前記排気処理装置の上流側及び下流側の一方に配設する弁装置を備えた内燃機関の排気装置において、前記弁装置が第１の弁部材及び第２の弁部材を備え、該第１の弁部材及び第２の弁部材の夫々の一端側を共通の揺動軸回りに揺動自在に支持すると共に、当該第１の弁部材及び第２の弁部材の夫々の他端側を所定の離隔状態と所定の近接状態との間で相互に移動可能に支持して成り、当該第１の弁部材及び第２の弁部材を前記揺動軸回りに揺動させると共に、前記所定の離隔状態から前記所定の近接状態に移動させて、前記メイン流路及び前記バイパス流路の流路面積を調整するように構成したものである。尚、ここでいう排気処理装置としては、触媒装置のみならず、排気熱回収装置、熱交換装置等を包含する。   In order to solve the above-mentioned problems, the present invention provides a main flow path that constitutes an exhaust flow path connected to an internal combustion engine and that includes an exhaust treatment device, and both ends of the main flow path. In the exhaust device of the internal combustion engine, which includes a bypass flow path that communicates with each other and bypasses the exhaust treatment device, and a valve device that is disposed on one of the upstream side and the downstream side of the exhaust treatment device, the valve device is a first The first valve member and the second valve member are supported, and one end side of each of the first valve member and the second valve member is swingably supported around a common swing shaft, and the first valve The other end side of each of the member and the second valve member is supported so as to be movable between a predetermined separation state and a predetermined proximity state, and the first valve member and the second valve member are Oscillates about the oscillating shaft and moves from the predetermined separation state to the predetermined proximity state. , Which is constituted so as to adjust the flow area of the main passage and the bypass passage. The exhaust treatment device here includes not only a catalyst device but also an exhaust heat recovery device, a heat exchange device, and the like.

上記の排気装置において、請求項２に記載のように、前記第１の弁部材及び第２の弁部材を前記所定の離隔状態から前記所定の近接状態とするまでの間に前記メイン流路及び前記バイパス流路の一方の流路の流路面積を連続的に設定するように構成するとよい。   In the exhaust apparatus, as described in claim 2, the main flow path and the first valve member and the second valve member are changed from the predetermined separation state to the predetermined proximity state. It is good to comprise so that the channel area of one channel of the said bypass channel may be set continuously.

例えば、請求項３に記載のように、前記第１の弁部材のみを駆動して前記第１の弁部材及び第２の弁部材を離隔状態で一体的に揺動させ、前記第２の弁部材を所定位置で係止させた後に、係止状態の前記第２の弁部材に対し前記第１の弁部材を更に駆動して前記所定の近接状態とするように構成するとよい。更に、請求項４に記載のように、前記第１の弁部材及び第２の弁部材の他端側を相互に離隔する方向に付勢する付勢手段を備えたものとし、係止状態の前記第２の弁部材に対し、前記第１の弁部材を前記付勢手段の付勢力に抗して駆動して前記所定の離隔状態から前記所定の近接状態とするように構成するとよい。   For example, as described in claim 3, only the first valve member is driven to swing the first valve member and the second valve member integrally in a separated state, and the second valve After the member is locked at a predetermined position, the first valve member may be further driven to the predetermined proximity state with respect to the second valve member in the locked state. Furthermore, as defined in claim 4, the first valve member and the second valve member are provided with urging means for urging the other end sides of the first valve member and the second valve member away from each other. The first valve member may be driven against the urging force of the urging means with respect to the second valve member to change from the predetermined separation state to the predetermined proximity state.

本発明は上述のように構成されているので以下に記載の効果を奏する。即ち、請求項１に記載の排気装置によれば、第１の弁部材及び第２の弁部材を備えた簡単且つ安価な弁装置によって、メイン流路及びバイパス流路の流路面積を適切に調整することができる。特に、請求項２及び３に記載のように、第１の弁部材及び第２の弁部材を所定の離隔状態から所定の近接状態とするまでの間にメイン流路及びバイパス流路の一方の流路の流路面積を連続的に設定することにより、流路面積を適切に調整することができる。   Since this invention is comprised as mentioned above, there exists an effect as described below. That is, according to the exhaust device of the first aspect, the flow passage areas of the main flow passage and the bypass flow passage are appropriately set by the simple and inexpensive valve device including the first valve member and the second valve member. Can be adjusted. In particular, as described in claims 2 and 3, one of the main flow path and the bypass flow path between the first valve member and the second valve member from the predetermined separation state to the predetermined proximity state. By continuously setting the channel area of the channel, the channel area can be appropriately adjusted.

更に、請求項４に記載のように付勢手段を備えたものとすれば、係止状態の第２の弁部材に対し、第１の弁部材を付勢手段の付勢力に抗して駆動して所定の離隔状態から所定の近接状態とした後、第１の弁部材を反対方向に駆動するときには、付勢手段の付勢力によって直ちに第１の弁部材及び第２の弁部材の他端側が相互に離隔する状態とされるので、迅速且つ適切に流路面積を調整することができる。   Further, if the biasing means is provided as described in claim 4, the first valve member is driven against the biasing force of the biasing means with respect to the second valve member in the locked state. When the first valve member is driven in the opposite direction after the predetermined separation state is changed to the predetermined proximity state, the other ends of the first valve member and the second valve member are immediately driven by the urging force of the urging means. Since the sides are separated from each other, the flow path area can be adjusted quickly and appropriately.

以下、本発明の望ましい実施形態について図面を参照して説明する。図１乃至図５は本発明の一実施形態に係る内燃機関の排気装置を示すもので、本実施形態では排気処理装置として、排気熱を吸収する熱交換装置１０が内蔵されている。先ず、図１及び図２を参照して概要を説明すると、排気ガス流路はメイン流路１とバイパス流路２に分岐され、分岐部４と合流部５が形成されており、分岐部４側が内燃機関（図示せず）に接続されている。メイン流路１には熱交換装置１０のウォータージャケット１１が介装され、その内部の排気流路１２を介して分岐部４が合流部５に連通するように構成されている。そして、分岐部４に弁装置２０が配設されている。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 to 5 show an exhaust device for an internal combustion engine according to an embodiment of the present invention. In this embodiment, a heat exchange device 10 that absorbs exhaust heat is incorporated as an exhaust treatment device. First, the outline will be described with reference to FIGS. 1 and 2. The exhaust gas flow path is branched into a main flow path 1 and a bypass flow path 2, and a branch portion 4 and a junction portion 5 are formed. The side is connected to an internal combustion engine (not shown). A water jacket 11 of a heat exchange device 10 is interposed in the main flow path 1, and the branch part 4 is configured to communicate with the merge part 5 via an exhaust flow path 12 inside the main flow path 1. A valve device 20 is disposed at the branching section 4.

本実施形態の弁装置２０は図１に示すように、第１の弁部材２１及び第２の弁部材２２を有し、夫々の一端側が共通の揺動軸回りに揺動自在に支持されている。第１の弁部材２１及び第２の弁部材２２の夫々の他端側は、図１に示す所定の離隔状態と図４に示す所定の近接状態（図４では当接し重合している）との間で相互に移動可能に支持されている。ここで、「揺動軸」は揺動中心（アクシス）と物理的な軸（シャフト）の両者を含み、本実施形態においては、第１の弁部材２１の一端側に揺動軸３が連結され、この揺動軸３は図２に示すクランク６に固定され、クランク６はピボット軸７を介してアーム８に連結されている。これに対し、第２の弁部材２２の一端側は揺動軸３回りに遊嵌されて揺動自在に支持され、第１の弁部材２１に対して相対的に移動し得るように支持されている。従って、本実施形態では物理的な軸（シャフト）の揺動軸３によって第１の弁部材２１のみが直接駆動され、第２の弁部材２２は揺動軸３を揺動中心（アクシス）として揺動軸３回りを揺動するように構成されているが、第１の弁部材２１及び第２の弁部材２２の両者を揺動軸３に遊嵌状態で支持し、第１の弁部材２１及び第２の弁部材２２の少なくとも一方を駆動することによって、両者が揺動中心（アクシス）としての揺動軸３回りを揺動するように構成してもよい。尚、分岐部４内にはハウジングＨと一体的に係止部２３が設けられており、この係止部２３に第２の弁部材２２の他端が当接すると係止状態とされる。   As shown in FIG. 1, the valve device 20 of the present embodiment has a first valve member 21 and a second valve member 22, each of which is supported so as to be swingable around a common swing shaft. Yes. The other end side of each of the first valve member 21 and the second valve member 22 has a predetermined separation state shown in FIG. 1 and a predetermined proximity state shown in FIG. Are supported to be movable relative to each other. Here, the “oscillation shaft” includes both an oscillation center (axis) and a physical axis (shaft), and in this embodiment, the oscillation shaft 3 is connected to one end side of the first valve member 21. The swing shaft 3 is fixed to a crank 6 shown in FIG. 2, and the crank 6 is connected to an arm 8 via a pivot shaft 7. On the other hand, one end side of the second valve member 22 is loosely fitted around the swing shaft 3 and supported so as to be swingable, and is supported so as to be able to move relative to the first valve member 21. ing. Therefore, in the present embodiment, only the first valve member 21 is directly driven by the swing shaft 3 of the physical shaft (shaft), and the second valve member 22 uses the swing shaft 3 as the swing center (axis). The first valve member 21 and the second valve member 22 are both supported by the swing shaft 3 in a loosely fitted state, and are configured to swing around the swing shaft 3. By driving at least one of the first valve member 21 and the second valve member 22, both may swing around the swing shaft 3 as the swing center (axis). In addition, the latching | locking part 23 is provided in the branch part 4 integrally with the housing H, and if the other end of the 2nd valve member 22 contact | abuts to this latching | locking part 23, it will be in a latching state.

更に、第１の弁部材２１及び第２の弁部材２２の夫々の他端側を相互に離隔する方向に付勢するスプリング等の付勢手段（図示せず）及び係止突起等の保持手段（図示せず）が設けられており、第１の弁部材２１及び第２の弁部材２２が拘束されない自由状態では、所定の離隔状態として、図１に示すように両者間で角度αをなす位置で保持されるように構成されている。而して、図１に示す状態では、バイパス流路２は第１の弁部材２１によって閉塞され、メイン流路１は第２の弁部材２２によって間隙Ａで示す流路面積に絞られている。尚、付勢手段を構成するスプリング及び保持手段を構成する係止突起の具体例は図８乃至図１０に示し、これらについては後述する。   Further, a biasing means (not shown) such as a spring for biasing the other end sides of the first valve member 21 and the second valve member 22 in a direction away from each other, and a holding means such as a locking projection (Not shown) is provided, and in a free state where the first valve member 21 and the second valve member 22 are not restrained, an angle α is formed between the two as shown in FIG. 1 as a predetermined separation state. Configured to be held in position. Thus, in the state shown in FIG. 1, the bypass flow path 2 is closed by the first valve member 21, and the main flow path 1 is restricted to the flow path area indicated by the gap A by the second valve member 22. . Specific examples of the springs constituting the urging means and the locking projections constituting the holding means are shown in FIGS. 8 to 10 and will be described later.

而して、モータ（図示せず）等によるアーム８の駆動に応じ、第１の弁部材２１を付勢手段の付勢力に抗して揺動軸３回りに図１及び図２の時計方向に揺動させると、第２の弁部材２２の他端が係止部２３に当接するまで、第１の弁部材２１及び第２の弁部材２２が図３に示すように所定の離隔状態（角度α）で一体となって移動する。そして、第２の弁部材２２の他端が係止部２３に当接して係止状態とされた後、更に、付勢手段の付勢力に抗して第１の弁部材２１を揺動軸３回りに時計方向に揺動させると、第１の弁部材２１の内側面が第２の弁部材２２の外側面に当接して図４に示すように重合する。この結果、メイン流路１が全閉状態で、バイパス流路２が全開状態となる。   Thus, in response to driving of the arm 8 by a motor (not shown) or the like, the first valve member 21 is rotated around the swing shaft 3 against the urging force of the urging means in the clockwise direction of FIGS. 3, until the other end of the second valve member 22 abuts on the locking portion 23, the first valve member 21 and the second valve member 22 are separated from each other as shown in FIG. Move together at an angle α). Then, after the other end of the second valve member 22 is brought into contact with the locking portion 23 to be locked, the first valve member 21 is further pivoted against the biasing force of the biasing means. When it is swung clockwise about 3, the inner surface of the first valve member 21 comes into contact with the outer surface of the second valve member 22 and is superposed as shown in FIG. As a result, the main flow path 1 is fully closed and the bypass flow path 2 is fully open.

以上のように、第１の弁部材２１及び第２の弁部材２２が所定の離隔状態で一体的に駆動され、第１の弁部材２１の移動に伴い、図１に示す第１の弁部材２１及び第２の弁部材２２の離隔状態から図４に示す第１の弁部材２１及び第２の弁部材２２の近接状態に至るまで移動し、この間メイン流路１及びバイパス流路２の流路面積が調整される。そして、図４に示す第１の弁部材２１及び第２の弁部材２２の近接状態（バイパス流路２の全開状態）から、第１の弁部材２１を反時計方向に揺動させると、図５に示すように、第１の弁部材２１及び第２の弁部材２２は所定の離隔状態（角度α）で一体的に移動し、メイン流路１が閉状態に維持されつつ、バイパス流路２の流路面積が調整される。   As described above, the first valve member 21 and the second valve member 22 are integrally driven in a predetermined separation state, and the first valve member shown in FIG. 4 and the first valve member 21 and the second valve member 22 shown in FIG. 4 are moved from the separated state to the close state of the first valve member 21 and the second valve member 22 shown in FIG. Road area is adjusted. Then, when the first valve member 21 is swung counterclockwise from the proximity state of the first valve member 21 and the second valve member 22 shown in FIG. As shown in FIG. 5, the first valve member 21 and the second valve member 22 move integrally in a predetermined separation state (angle α), and the main flow path 1 is maintained in the closed state, while the bypass flow path 2 channel area is adjusted.

上記の図３乃至図５の作動を、内燃機関（図示せず）の運転状態に応じて説明すると、図３は暖機後の通常運転状態（緩加速時等）を示し、内燃機関（図示せず）の運転状態に応じて第１の弁部材２１が駆動され、バイパス流路２が間隙Ｂで示す流路面積に絞られる。一方、第２の弁部材２２は、保持手段（図示せず）によって第１の弁部材２１に対し角度αをなす所定の離隔状態に保持され、分岐部４のハウジングＨの内面に対し所定距離ｄ重合しており、これによってメイン流路１内への排気ガスの流入が阻止される。このとき、第２の弁部材２２とハウジングＨの内面との間にはクリアランスがあり、若干の排気ガスが流入するが、この運転状態において支障はない。このように、第２の弁部材２２はハウジングＨの内面に対し摺動するものではなく、クリアランスが許容されるので、高精度の摺動面加工は必要とされない。また、第１の弁部材２１と第２の弁部材２２がなす角度αも然程大きくする必要はなく、重合部（ｄ）を小さくすることができる。このように、出力要件や排気浄化要件に支障を生じない範囲で、バイパス流路２を適宜絞ることができるので、所期の消音効果を確保することができる。   The operation of FIGS. 3 to 5 will be described in accordance with the operating state of the internal combustion engine (not shown). FIG. 3 shows the normal operating state after warm-up (such as during slow acceleration). The first valve member 21 is driven according to the operation state (not shown), and the bypass flow path 2 is narrowed to the flow path area indicated by the gap B. On the other hand, the second valve member 22 is held in a predetermined separated state with an angle α with respect to the first valve member 21 by a holding means (not shown), and a predetermined distance from the inner surface of the housing H of the branch portion 4. d-polymerization is performed, thereby preventing the exhaust gas from flowing into the main flow path 1. At this time, there is a clearance between the second valve member 22 and the inner surface of the housing H, and some exhaust gas flows in, but there is no problem in this operating state. Thus, since the 2nd valve member 22 does not slide with respect to the inner surface of the housing H, and clearance is permitted, a highly accurate sliding surface process is not required. In addition, the angle α formed by the first valve member 21 and the second valve member 22 does not need to be increased so much, and the overlapping portion (d) can be reduced. In this way, the bypass flow path 2 can be appropriately throttled within a range that does not hinder the output requirements and the exhaust purification requirements, so that the desired silencing effect can be ensured.

図４は暖機後の最高出力状態（最大流量時）を示し、バイパス流路２が全開（間隙Ｃ）となるように、第１の弁部材２１及び第２の弁部材２２はバイパス流路２内に位置しない状態とされる。具体的には、図２のアーム８が駆動され、第１の弁部材２１が付勢手段（図示せず）の付勢力に抗して揺動軸３回りに図４の時計方向に揺動すると、これに伴い第２の弁部材２２が一体となって揺動する。そして、第２の弁部材２２の他端が係止部２３に当接して係止状態とされ、図４に示すように第１の弁部材２１と第２の弁部材２２が重合した後は、メイン流路１は全閉状態とされ、バイパス流路２は全開状態となる。このとき第１の弁部材２１と第２の弁部材２２がなす角度はγで最小角度となり、第２の弁部材２２は付勢手段（図示せず）の付勢力によって係止部２３に押圧された状態となる。   FIG. 4 shows the maximum output state after warm-up (at the maximum flow rate), and the first valve member 21 and the second valve member 22 are bypass flow paths so that the bypass flow path 2 is fully open (gap C). 2 is not located. Specifically, the arm 8 in FIG. 2 is driven, and the first valve member 21 swings around the swing shaft 3 in the clockwise direction in FIG. 4 against the biasing force of the biasing means (not shown). As a result, the second valve member 22 swings integrally. Then, after the other end of the second valve member 22 comes into contact with the locking portion 23 to be locked, and the first valve member 21 and the second valve member 22 are superposed as shown in FIG. The main flow path 1 is fully closed, and the bypass flow path 2 is fully open. At this time, the angle formed by the first valve member 21 and the second valve member 22 is γ, which is the minimum angle, and the second valve member 22 is pressed against the locking portion 23 by a biasing force of a biasing means (not shown). It will be in the state.

図５は暖機後であって、内燃機関（図示せず）の減速時、あるいはフューエルカットによるモータリング時の状態を示す。例えば図４の状態から第１の弁部材２１が反時計方向に駆動されると、第２の弁部材２２はこれに追従する形となり、第１の弁部材２１に対し角度αをなす所定の離隔状態に至るとその状態に保持される。更に第１の弁部材２１が反時計方向に駆動されて図５に示す状態となると、例えばバイパス流路２が間隙Ｄで示す流路面積に絞られるが、メイン流路１は第２の弁部材２２によって依然閉状態が維持されている。尚、この場合には出力要件は求められないので消音要件を重視し、バイパス流路２は図３の状態より多く絞る（Ｄ＜Ｂ）ように構成するとよい。   FIG. 5 shows a state after the engine is warmed up and when the internal combustion engine (not shown) is decelerated or is motored by fuel cut. For example, when the first valve member 21 is driven counterclockwise from the state of FIG. 4, the second valve member 22 follows this, and a predetermined angle α is formed with respect to the first valve member 21. When the separated state is reached, the state is maintained. Further, when the first valve member 21 is driven counterclockwise to reach the state shown in FIG. 5, for example, the bypass flow path 2 is restricted to the flow path area indicated by the gap D, but the main flow path 1 is the second valve. The closed state is still maintained by the member 22. In this case, since the output requirement is not required, the silencing requirement is emphasized, and the bypass flow path 2 may be configured to be narrowed more than the state of FIG. 3 (D <B).

次に、図６は本発明の他の実施形態を示すもので、排気処理装置の他の例として、図１乃至図５に記載の実施形態における熱交換装置１０に代えて、触媒担体４１及び緩衝マット４２から成る触媒装置４０がメイン流路１に介装されている。また、本実施形態の弁装置３０は合流部５に配設され、板材で形成された第１の弁部材３１及び第２の弁部材３２の一端側が共通の揺動軸３３回りに揺動自在に支持され、夫々の他端側は、両者間に配置された圧縮スプリング３４によって離隔方向に付勢されている。尚、この弁装置３０は前述の実施形態と同様に分岐部４に配設することとしてもよい。図６の状態は、図３の状態と同様、暖機後の通常運転状態（緩加速時等）を示し、内燃機関（図示せず）の運転状態に応じて第１の弁部材３１が駆動され、バイパス流路２が絞られると共に、第１の弁部材３１に対し角度αをなす所定の離隔状態に保持された第２の弁部材３２は、係止部３５に係止され、メイン流路１の出力側が閉塞されている。   Next, FIG. 6 shows another embodiment of the present invention. As another example of the exhaust treatment device, instead of the heat exchange device 10 in the embodiment shown in FIGS. 1 to 5, a catalyst carrier 41 and A catalyst device 40 comprising a buffer mat 42 is interposed in the main flow path 1. In addition, the valve device 30 of the present embodiment is disposed in the merging portion 5, and one end side of the first valve member 31 and the second valve member 32 formed of a plate material can swing around a common swing shaft 33. The other end of each is urged in the separation direction by a compression spring 34 disposed between them. In addition, this valve device 30 is good also as arrange | positioning in the branch part 4 similarly to the above-mentioned embodiment. The state of FIG. 6 shows the normal operation state after warming up (at the time of slow acceleration, etc.) as in the state of FIG. 3, and the first valve member 31 is driven according to the operation state of the internal combustion engine (not shown). In addition, the bypass flow path 2 is throttled, and the second valve member 32 held in a predetermined separated state having an angle α with respect to the first valve member 31 is locked by the locking portion 35, and the main flow The output side of the path 1 is blocked.

次に、図７乃至図１０は本発明の更に他の実施形態を示すもので、図１乃至図５に記載の熱交換装置１０と同様の排気処理装置がメイン流路１に介装され、図６に記載の弁装置３０と同様の弁装置（図７では３００とする）が合流部５に配設されている。本実施形態では、第１のインナパイプ２０１と第２のインナパイプ２０２がワイヤメッシュリング２０３を介して嵌合されてバイパス流路２が形成されており、第１のインナパイプ２０１の上流側には複数の連通孔２０４が穿設されており、これらの連通孔２０４を介してバイパス流路２がメイン流路１に連通し、連通孔２０４近傍で分岐部４が構成されている。そして、図８に示すように第２のインナパイプ２０２の合流部５側の開口端に第１の弁部材３１０が当接すると、バイパス流路２が閉塞されるように構成されている。   Next, FIG. 7 to FIG. 10 show still another embodiment of the present invention. An exhaust treatment device similar to the heat exchange device 10 shown in FIG. 1 to FIG. A valve device (300 in FIG. 7) similar to the valve device 30 shown in FIG. In the present embodiment, the first inner pipe 201 and the second inner pipe 202 are fitted via the wire mesh ring 203 to form the bypass flow path 2, and on the upstream side of the first inner pipe 201. A plurality of communication holes 204 are formed, and the bypass flow path 2 communicates with the main flow path 1 through these communication holes 204, and the branching portion 4 is configured in the vicinity of the communication holes 204. And as shown in FIG. 8, when the 1st valve member 310 contact | abuts to the opening end by the side of the confluence | merging part 5 of the 2nd inner pipe 202, it is comprised so that the bypass flow path 2 may be obstruct | occluded.

本実施形態の弁装置３００は、図８に示すように第１の弁部材３１０及び第２の弁部材３２０の一端側が共通の揺動軸３３０回りに揺動自在に支持され、夫々の他端側は、揺動軸３３０回りに配置された圧縮スプリング３４０によって離隔方向に付勢されている。そして、第１の弁部材３１０及び第２の弁部材３２０が拘束されない自由状態では、所定の離隔状態として、図８に示すように両者間で角度αをなす位置で保持されるように構成されている。この場合において、保持手段として第２の弁部材３２０と一体的に係止突起３２１が形成されており、この係止突起３２１が第１の弁部材３１０に当接した状態、即ち第１の弁部材３１０と第２の弁部材３２０とが所定の離隔状態（両者がなす角度α）に保持されるように構成されている。尚、図８において、メイン流路１から流出する排気ガスの圧力によって、第２の弁部材３２０が圧縮スプリング３４０の付勢力に抗して第１の弁部材３１０側に若干駆動される（角度αが減少する）ように構成してもよい。   As shown in FIG. 8, the valve device 300 of the present embodiment is supported such that one end sides of the first valve member 310 and the second valve member 320 are swingable around a common swing shaft 330, and the other end of each of them. The side is biased in the separation direction by a compression spring 340 disposed around the swing shaft 330. And in the free state where the 1st valve member 310 and the 2nd valve member 320 are not restrained, as shown in FIG. 8, it is comprised so that it may hold | maintain in the position which makes angle (alpha) between both as shown in FIG. ing. In this case, a locking projection 321 is formed integrally with the second valve member 320 as a holding means, and the locking projection 321 is in contact with the first valve member 310, that is, the first valve. The member 310 and the second valve member 320 are configured to be held in a predetermined separated state (the angle α formed by both). In FIG. 8, the second valve member 320 is slightly driven toward the first valve member 310 against the urging force of the compression spring 340 by the pressure of the exhaust gas flowing out from the main flow path 1 (angle). You may comprise so that (alpha) may reduce.

本実施形態では、第１の弁部材３１０を圧縮スプリング３４０の付勢力に抗して揺動軸３３０回りに図７及び図８の反時計方向に揺動させると、第２の弁部材３２０の他端が係止部３５０に当接するまで、第１の弁部材３１０及び第２の弁部材３２０が所定の離隔状態で一体となって移動する。そして、第２の弁部材３２０の他端が係止部３５０に当接して係止状態とされた後、更に、圧縮スプリング３４０の付勢力に抗して第１の弁部材３１０を揺動軸３３０回りに反時計方向に揺動させると、図９に示すように第１の弁部材３１０が第２の弁部材３２０に近接した位置となり、メイン流路１が全閉状態で、バイパス流路２が全開状態となる。   In this embodiment, when the first valve member 310 is swung counterclockwise in FIGS. 7 and 8 against the urging force of the compression spring 340, the second valve member 320 is rotated. The first valve member 310 and the second valve member 320 move together in a predetermined separated state until the other end comes into contact with the locking portion 350. Then, after the other end of the second valve member 320 is brought into contact with the locking portion 350 to be locked, the first valve member 310 is further pivoted against the urging force of the compression spring 340. When it is swung counterclockwise around 330, the first valve member 310 is in a position close to the second valve member 320 as shown in FIG. 2 is fully open.

以上のように、第１の弁部材３１０及び第２の弁部材３２０が所定の離隔状態で一体的に駆動され、図８に示す第１の弁部材３１０及び第２の弁部材３２０の離隔状態から図９に示す第１の弁部材３１０及び第２の弁部材３２０の近接状態に移動し、この間メイン流路１及びバイパス流路２の流路面積が調整される。そして、図９に示す状態から、第１の弁部材３１０を時計方向に揺動させると第１の弁部材３１０及び第２の弁部材３２０の他端側は漸次離隔し、図１０に示すように、第１の弁部材３１０及び第２の弁部材３２０は所定の離隔状態（両者がなす角度α）となった後は一体的に移動し、バイパス流路２の流路面積が調整される。   As described above, the first valve member 310 and the second valve member 320 are integrally driven in a predetermined separated state, and the separated state of the first valve member 310 and the second valve member 320 shown in FIG. 9 to the proximity of the first valve member 310 and the second valve member 320 shown in FIG. 9, during which the flow passage areas of the main flow passage 1 and the bypass flow passage 2 are adjusted. Then, when the first valve member 310 is swung clockwise from the state shown in FIG. 9, the other end sides of the first valve member 310 and the second valve member 320 are gradually separated, as shown in FIG. In addition, the first valve member 310 and the second valve member 320 move together after reaching a predetermined separated state (the angle α formed by both), and the flow passage area of the bypass flow passage 2 is adjusted. .

上記の図８乃至図１０における内燃機関（図示せず）の運転状態に応じた作動は、図３乃至図５と略同様であるので詳細な説明は省略するが、本実施形態では、特に、複数の連通孔２０４を介してメイン流路１とバイパス流路２が連通する構成とされているので、図９及び図１０に示すように、メイン流路１が全閉状態とされているときには、ヘルムホルツレゾネータとして機能し得る。即ち、連通孔２０４が首管、メイン流路１がボリュームを構成し、これらのディメンジョンに応じた周波数成分を減衰し得るという効果がある。   The operation in accordance with the operation state of the internal combustion engine (not shown) in FIGS. 8 to 10 is substantially the same as that in FIGS. 3 to 5 and will not be described in detail. Since the main flow path 1 and the bypass flow path 2 are configured to communicate with each other through the plurality of communication holes 204, as shown in FIGS. 9 and 10, when the main flow path 1 is fully closed, It can function as a Helmholtz resonator. That is, the communication hole 204 constitutes a neck tube, and the main flow path 1 constitutes a volume, and there is an effect that frequency components corresponding to these dimensions can be attenuated.

上記の実施形態においては、何れも第１の弁部材のみが駆動手段に連結されており、第２の弁部材は駆動手段に連結されておらず、付勢手段及び保持手段によって第１の弁部材と一体となって移動し、あるいは係止部で係止状態とされた後は第１の弁部材の移動に応じて駆動されるように構成されているが、更に第２の弁部材も駆動手段に連結して、第２の弁部材自体でも移動可能となるように構成してもよい。このように、第２の弁部材も独立して駆動することにより、積極的にメイン流路を絞って背圧を高めることで熱交換効率を向上させ、また消音効果を奏し得るようなチューニングも可能となる。尚、第１の弁部材と第２の弁部材との間に配設されるスプリング等の付勢手段及び係止突起等の保持手段に代えて、メカニカルリンク等を用いることとしてもよい。また、本発明は、上記の熱交換装置や触媒装置等に限らず、例えば排気ガス改変装置、排気熱回収装置等、種々の排気処理装置に適用し得る。   In each of the above embodiments, only the first valve member is connected to the drive means, and the second valve member is not connected to the drive means, and the first valve member is driven by the biasing means and the holding means. The first valve member is configured to be driven in accordance with the movement of the first valve member after moving together with the member or after being locked by the locking portion. The second valve member itself may be configured to be movable by being connected to the driving means. In this way, the second valve member is also driven independently, so that the main flow path is actively throttled to increase the back pressure, thereby improving the heat exchange efficiency, and tuning that can produce a silencing effect. It becomes possible. A mechanical link or the like may be used instead of an urging means such as a spring and a holding means such as a locking projection disposed between the first valve member and the second valve member. The present invention is not limited to the heat exchange device and the catalyst device described above, and can be applied to various exhaust treatment devices such as an exhaust gas modification device and an exhaust heat recovery device.

本発明の一実施形態に係る排気装置の断面図である。It is sectional drawing of the exhaust apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る排気装置の正面図である。It is a front view of the exhaust apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態における弁装置の作動状態を示す断面図である。It is sectional drawing which shows the operating state of the valve apparatus in one Embodiment of this invention. 本発明の一実施形態における弁装置の作動状態を示す断面図である。It is sectional drawing which shows the operating state of the valve apparatus in one Embodiment of this invention. 本発明の一実施形態における弁装置の作動状態を示す断面図である。It is sectional drawing which shows the operating state of the valve apparatus in one Embodiment of this invention. 本発明の他の実施形態に係る排気装置の断面図である。It is sectional drawing of the exhaust apparatus which concerns on other embodiment of this invention. 本発明の更に他の実施形態に係る排気装置の正面図である。It is a front view of the exhaust apparatus which concerns on other embodiment of this invention. 本発明の更に他の実施形態に係る排気装置の断面図である。It is sectional drawing of the exhaust apparatus which concerns on other embodiment of this invention. 本発明の更に他の実施形態における弁装置の作動状態を示す断面図である。It is sectional drawing which shows the operating state of the valve apparatus in other embodiment of this invention. 本発明の更に他の実施形態における弁装置の作動状態を示す断面図である。It is sectional drawing which shows the operating state of the valve apparatus in other embodiment of this invention.

符号の説明Explanation of symbols

１ メイン流路
２ バイパス流路
３，３３，３３０ 揺動軸
４ 分岐部
５ 合流部
１０ 熱交換装置
２０，３０，３００ 弁装置
２１，３１，３１０ 第１の弁部材
２２，３２，３２０ 第２の弁部材
２３，３５，３５０ 係止部
３４，３４０ 圧縮スプリング
４０ 触媒装置 DESCRIPTION OF SYMBOLS 1 Main flow path 2 Bypass flow path 3, 33, 330 Oscillation shaft 4 Branch part 5 Merge part 10 Heat exchange apparatus 20, 30, 300 Valve apparatus 21, 31, 310 First valve member 22, 32, 320 Second Valve members 23, 35, 350 engaging portions 34, 340 compression spring 40 catalyst device

Claims (4)

内燃機関に接続される排気流路を構成し排気処理装置を介装するメイン流路と、該メイン流路に両端を連通接続し前記排気処理装置を迂回するバイパス流路と、前記排気処理装置の上流側及び下流側の一方に配設する弁装置を備えた内燃機関の排気装置において、前記弁装置が第１の弁部材及び第２の弁部材を備え、該第１の弁部材及び第２の弁部材の夫々の一端側を共通の揺動軸回りに揺動自在に支持すると共に、当該第１の弁部材及び第２の弁部材の夫々の他端側を所定の離隔状態と所定の近接状態との間で相互に移動可能に支持して成り、当該第１の弁部材及び第２の弁部材を前記揺動軸回りに揺動させると共に、前記所定の離隔状態から前記所定の近接状態に移動させて、前記メイン流路及び前記バイパス流路の流路面積を調整するように構成したことを特徴とする内燃機関の排気装置。   A main flow path that constitutes an exhaust flow path connected to the internal combustion engine and interposes the exhaust treatment apparatus, a bypass flow path that connects both ends of the main flow path to bypass the exhaust treatment apparatus, and the exhaust treatment apparatus An exhaust device for an internal combustion engine including a valve device disposed on one of the upstream side and the downstream side of the engine, wherein the valve device includes a first valve member and a second valve member, and the first valve member and the second valve member One end side of each of the two valve members is swingably supported around a common swing shaft, and the other end side of each of the first valve member and the second valve member is set to a predetermined separated state and a predetermined The first valve member and the second valve member are swung around the swinging shaft, and are moved from the predetermined separated state to the predetermined state. Move to the close state and adjust the flow area of the main flow path and the bypass flow path An exhaust system of an internal combustion engine, characterized in that the sea urchin configuration. 前記第１の弁部材及び第２の弁部材を前記所定の離隔状態から前記所定の近接状態とするまでの間に前記メイン流路及び前記バイパス流路の一方の流路の流路面積を連続的に設定するように構成したことを特徴とする請求項１記載の内燃機関の排気装置。   The flow path area of one of the main flow path and the bypass flow path is continuous between the first valve member and the second valve member from the predetermined separation state to the predetermined proximity state. 2. An exhaust system for an internal combustion engine according to claim 1, wherein the exhaust system is configured to be set in an automatic manner. 前記第１の弁部材のみを駆動して前記第１の弁部材及び第２の弁部材を離隔状態で一体的に揺動させ、前記第２の弁部材を所定位置で係止させた後に、係止状態の前記第２の弁部材に対し前記第１の弁部材を更に駆動して前記所定の近接状態とするように構成したことを特徴とする請求項２記載の内燃機関の排気装置。   After driving only the first valve member and swinging the first valve member and the second valve member integrally in a separated state, and locking the second valve member at a predetermined position, The exhaust system for an internal combustion engine according to claim 2, wherein the first valve member is further driven to the predetermined proximity state with respect to the second valve member in the locked state. 前記第１の弁部材及び第２の弁部材の他端側を相互に離隔する方向に付勢する付勢手段を備え、係止状態の前記第２の弁部材に対し、前記第１の弁部材を前記付勢手段の付勢力に抗して駆動して前記所定の離隔状態から前記所定の近接状態とするように構成したことを特徴とする請求項３記載の内燃機関の排気装置。   And a biasing means for biasing the other end sides of the first valve member and the second valve member in a direction away from each other, and the first valve with respect to the locked second valve member. 4. An exhaust system for an internal combustion engine according to claim 3, wherein the member is driven against the urging force of the urging means to change from the predetermined separated state to the predetermined close state.
JP2008102160A 2008-04-10 2008-04-10 Exhaust device for internal combustion engine Expired - Fee Related JP5058050B2 (en)

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US11022069B2 (en) 2018-12-07 2021-06-01 Tenneco Automotive Operating Company Inc. Exhaust gas heat recovery system
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JP6086837B2 (en) * 2013-08-06 2017-03-01 株式会社三五 Exhaust heat recovery device
JP6970070B2 (en) * 2018-10-22 2021-11-24 フタバ産業株式会社 Exhaust heat recovery device

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JP4221201B2 (en) * 2002-09-20 2009-02-12 アイシン高丘株式会社 Engine exhaust gas purification device
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JP4591251B2 (en) * 2005-07-26 2010-12-01 日産自動車株式会社 Exhaust device for internal combustion engine

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KR20160114761A (en) * 2015-03-24 2016-10-06 현대자동차주식회사 Exhaust system for vehicle
KR102283769B1 (en) * 2015-03-24 2021-07-30 현대자동차주식회사 Exhaust system for vehicle
US11022069B2 (en) 2018-12-07 2021-06-01 Tenneco Automotive Operating Company Inc. Exhaust gas heat recovery system
US11041459B2 (en) 2018-12-07 2021-06-22 Tenneco Automotive Operating Company Inc. Exhaust gas heat recovery system

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