JPH0558841U - Exhaust system for turbocharged engine - Google Patents

Exhaust system for turbocharged engine

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Publication number
JPH0558841U
JPH0558841U JP507092U JP507092U JPH0558841U JP H0558841 U JPH0558841 U JP H0558841U JP 507092 U JP507092 U JP 507092U JP 507092 U JP507092 U JP 507092U JP H0558841 U JPH0558841 U JP H0558841U
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JP
Japan
Prior art keywords
exhaust
pipe
engine
turbocharger
bank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP507092U
Other languages
Japanese (ja)
Inventor
儀隆 福島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Subaru Corp
Original Assignee
Fuji Jukogyo KK
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Filing date
Publication date
Application filed by Fuji Jukogyo KK filed Critical Fuji Jukogyo KK
Priority to JP507092U priority Critical patent/JPH0558841U/en
Publication of JPH0558841U publication Critical patent/JPH0558841U/en
Pending legal-status Critical Current

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  • Exhaust Silencers (AREA)
  • Supercharger (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

(57)【要約】 【目的】 プライマリとセカンダリの過給機を左右バン
クに分離独立して装備し、両過給機の上流側を連通管で
連通し且つ下流側を集合して構成する方式において、排
気管長の差による不快音等を低減し、且つ出力アップす
る。 【構成】 水平対向式エンジン1の右バンク4に排気制
御弁15を有して配置されるセカンダリターボ過給機1
0からの排気管14と、左バンク3に配置されるプライ
マリターボ過給機20からの排気管24との間に接続管
25を連通し、この接続管25に音圧を低減し、且つス
ロットル全開時に出力アップする開閉弁26を設ける。
(57) [Summary] [Purpose] A system in which primary and secondary superchargers are separately installed in the left and right banks, and the upstream sides of both superchargers are connected by communication pipes and the downstream sides are assembled. In, the unpleasant noise due to the difference in exhaust pipe length is reduced and the output is increased. [Structure] A secondary turbocharger 1 arranged with a discharge control valve 15 in a right bank 4 of a horizontally opposed engine 1.
A connecting pipe 25 is connected between the exhaust pipe 14 from 0 and the exhaust pipe 24 from the primary turbocharger 20 arranged in the left bank 3 to reduce the sound pressure in the connecting pipe 25 and to throttle the throttle. An on-off valve 26 is provided for increasing the output when fully opened.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial application]

本考案は、車両用のエンジンに複数のターボ過給機を装備して、シーケンシャ ルターボ式に作動するターボ過給機付エンジンの排気装置に関し、詳しくは、各 ターボ領域での不快音を低減し、出力性能を向上するものに関する。 The present invention relates to an exhaust system for a turbocharged engine that operates in a sequential turbo type by equipping a vehicle engine with a plurality of turbochargers, and more specifically, it reduces unpleasant noise in each turbo range. , Those that improve output performance.

【0002】[0002]

【従来の技術】[Prior Art]

この種のシーケンシャルターボ式過給機を備えたエンジンとして、エンジンの 複数の気筒を2分して、一方の気筒群の排気系をプライマリターボ過給機に、他 方の気筒群の排気系をセカンダリターボ過給機にそれぞれ連通し、これらの過給 機の下流側は1つに集合して触媒コンバータ以降に連通する。またセカンダリタ ーボ過給機の排気系の直上流には排気制御弁を設けて、低速域でその過給機を不 作動にすることを可能にし、この低速域でセカンダリ側の排気をプライマリ側に 導くため両排気系を連通管で連通して排気装置を構成する。そして例えば低速域 ではプライマリターボ過給機のみを作動し、中、高速域でプライマリとセカンダ リの両ターボ過給機を作動して、低速域から高速域に及ぶ広い領域で高いエンジ ン出力特性を得るものが提案されている。 As an engine equipped with this type of sequential turbocharger, the cylinders of the engine are divided into two parts, and the exhaust system of one cylinder group is used as the primary turbocharger and the exhaust system of the other cylinder group is used. It communicates with each secondary turbocharger, and the downstream sides of these turbochargers are combined into one and communicate with the catalytic converter and thereafter. An exhaust control valve is installed directly upstream of the exhaust system of the secondary turbocharger to make it possible to deactivate the turbocharger in the low speed range, and the exhaust on the secondary side is primary in this low speed range. An exhaust system is constructed by connecting both exhaust systems with a communication pipe to guide them to the side. Then, for example, only the primary turbocharger operates in the low speed range, and both the primary and secondary turbochargers operate in the medium and high speed ranges to achieve high engine output characteristics in a wide range from the low speed range to the high speed range. What you get is proposed.

【0003】 ここでV型や水平対向のエンジンにおいて上記シーケンシャルターボ式に構成 する場合は、複数の気筒の排気ポートが左右のバンクに2分して配置されている ため、プライマリとセカンダリの過給機も左右のバンクにそれぞれ離れて配置さ れる。そこで中、高速域で両過給機が作動する場合は、左右バンクから排気系の 集合部までの長さが等しくなって問題を生じないが、低速域でセカンダリターボ 過給機が不作動する場合には、セカンダリ側バンクの排気長さが連通管の分だけ 長くなって、左右バンクから集合部に至る長さが不等長になる。このため左右バ ンクの気筒で燃焼、爆発して排出される排気圧力の周波数にハーフ成分が発生し て、これによりボロボロという不快な不連続音を生じる。従って、このような不 連続音を低減し、且つ両ターボ領域においても排気を更に適正に流して音圧を低 減し、出力アップすることが望まれる。In the case of the V-type or horizontally opposed engine of the sequential turbo type, since the exhaust ports of a plurality of cylinders are divided into two banks, the primary and secondary superchargers. The aircraft are also placed separately on the left and right banks. Therefore, if both turbochargers operate in the medium to high speed range, the length from the left and right banks to the exhaust gas collecting unit will be the same, but no problem will occur, but the secondary turbocharger will not operate in the low speed range. In this case, the exhaust length of the secondary-side bank becomes longer by the amount of the communication pipe, and the length from the left and right banks to the collecting section becomes unequal. As a result, a half component is generated in the frequency of the exhaust pressure that is burned and exploded in the left and right bank cylinders, and this causes an unpleasant discontinuous sound that is tattered. Therefore, it is desirable to reduce such discontinuous noise, and to more appropriately flow the exhaust gas in both turbo regions to reduce the sound pressure and increase the output.

【0004】 従来、上記シーケンシャルターボ式過給機を備えたエンジンの排気装置に関し ては、例えば特開昭50−118117号公報の先行技術があり、全ての気筒の 排気系をまとめて2台の過給機に連通し、1つの過給機に設けた制御弁によりそ の過給機を不作動または作動してシーケンシャルターボ式に作用することが示さ れているConventionally, as an exhaust system for an engine provided with the above-mentioned sequential turbocharger, there is a prior art disclosed in, for example, Japanese Unexamined Patent Publication No. 50-118117, and two exhaust systems of all cylinders are integrated. It has been shown that the turbocharger communicates with the supercharger and the supercharger is inactivated or activated by a control valve provided in one supercharger to operate in a sequential turbo system.

【0005】[0005]

【考案が解決しようとする課題】[Problems to be solved by the device]

ところで、上記先行技術のものにあっては、全ての気筒を2台の過給機にまと めて連通構成した方式であるから、排気管長の差による問題は生じない。しかし 2台の過給機の作動時に各過給機に導入される排気が、排気干渉や各過給機の作 動状態により影響され、このため両過給機を効率良く作動して出力アップするこ とが非常に難しい。 By the way, in the above-mentioned prior art, since all cylinders are connected to each other by connecting them to two superchargers, there is no problem due to the difference in exhaust pipe length. However, the exhaust gas introduced to each turbocharger when the two turbochargers are operating is affected by exhaust interference and the operating state of each turbocharger, and therefore both turbochargers operate efficiently and output is increased. Very difficult to do.

【0006】 本考案は、この点に鑑みてなされたもので、プライマリとセカンダリの過給機 を左右バンクに分離独立して装備し、両過給機の上流側を連通管で連通し且つ下 流側を集合して構成する方式において、排気管長の差による不快音等を低減し、 且つ出力アップすることを目的とする。The present invention has been made in view of this point, and primary and secondary superchargers are separately provided in the left and right banks, and the upstream sides of both superchargers are connected by a communication pipe and are connected to each other. An object of the present invention is to reduce unpleasant noise due to the difference in exhaust pipe length and to increase the output in the system in which the flow sides are assembled.

【0007】[0007]

【課題を解決するための手段】[Means for Solving the Problems]

上記目的を達成するため、本考案は、エンジンの一方のバンクからの排気管が 排気制御弁を有するセカンダリターボ過給機に連通され、他方のバンクからの排 気管がそのままプライマリターボ過給機に連通され、両排気管が連通管で連通さ れ、両過給機の流出側が1本の排気管に集合されて、シーケンシャルターボ式に 過給作用するターボ過給機付エンジンにおいて、両過給機の流出側の排気管の集 合部前に接続管が連通され、その接続管に開閉弁が設けられるものである。 In order to achieve the above object, the present invention has an exhaust pipe from one bank of an engine connected to a secondary turbocharger having an exhaust control valve, and an exhaust pipe from the other bank to the primary turbocharger as it is. In the turbocharged engine that is connected to each other, the exhaust pipes are connected by a communication pipe, the outflow sides of both turbochargers are gathered into one exhaust pipe, and turbocharging is performed in a turbocharger engine that operates in a sequential turbo system. A connecting pipe communicates with the exhaust pipe on the outflow side of the machine, and an on-off valve is installed in the connecting pipe.

【0008】[0008]

【作用】 上記構成に基づき、エンジン運転時の例えば低速域では排気制御弁を閉じてプ ライマリターボ過給機のみが作動し、このとき開閉弁を開いて排気圧力の位相を ずらすように作用され、これにより左右バンクから集合部までの排気管長の差に よる不連続音が低減される。また中、高速域では排気制御弁を開き両過給機が作 動して出力アップするようになり、このときは開閉弁を閉じることで接続管が共 鳴管として作用され、スロットル全開では再び開閉弁を開いて排気慣性力の増大 により出力アップするようになる。[Effects] Based on the above configuration, the exhaust control valve is closed and only the primary turbocharger operates when the engine is operating, for example, in the low speed range. At this time, the opening / closing valve is opened to act to shift the phase of the exhaust pressure. Therefore, the discontinuous noise due to the difference in the exhaust pipe length from the left and right banks to the collecting part is reduced. Also, in the medium and high speed range, the exhaust control valve is opened and both turbochargers are activated to increase the output.At this time, the connecting pipe acts as a common pipe by closing the open / close valve, and when the throttle is fully opened, it is restored. The on-off valve is opened to increase the output by increasing the exhaust inertial force.

【0009】[0009]

【実施例】【Example】

以下、本考案の実施例を図面に基づいて説明する。図1において、4気筒の水 平対向式エンジンにシーケンシャルターボ式過給機を装備した場合について説明 する。水平対向式エンジン1は、クランクケース2に左,右のバンク3,4が水 平に配設され、右バンク4に第1と第3の気筒が、左バンク3に第2と第4の気 筒が配置され、#1→#3→#2→#4気筒の点火順序で運転する。そしてこの エンジン1の後部に変速機5を連結して、車体前後方向に縦置き配置して搭載さ れる。 Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the case where a 4-cylinder horizontal opposed engine is equipped with a sequential turbocharger will be described. In the horizontally opposed engine 1, the left and right banks 3 and 4 are horizontally arranged in the crankcase 2, the first and third cylinders are in the right bank 4, and the second and fourth cylinders are in the left bank 3. Air cylinders are arranged and they are operated in the ignition order of # 1 → # 3 → # 2 → # 4 cylinders. Then, the transmission 5 is connected to the rear portion of the engine 1 and vertically mounted in the longitudinal direction of the vehicle body.

【0010】 シーケンシャルターボ式過給機の配置と排気系について説明する。先ず、エン ジン1の右バンク4の付近にセカンダリターボ過給機10が、左バンク3の付近 にプライマリターボ過給機20がそれぞれ配置されている。右バンク4の第1と 第3の気筒の排気ポート11は、排気マニホールド12を介して1本の排気管1 3に連通され、この排気管13の後端が排気制御弁15を有してセカンダリター ボ過給機10に連通される。また左バンク3の第2と第4の気筒の排気ポート2 1も、同様に排気マニホールド22を介して排気管23に連通され、排気管23 の後端がそのままプライマリターボ過給機20に連通される。そして両排気管1 3,23の前端は、エンジン1の前方下部に引回した連通管16に連通される。 更に両過給機10,20の下流側の排気管14,24は、集合部17で1本の排 気管18に集合してマフラー19等に連通される。The layout of the sequential turbo supercharger and the exhaust system will be described. First, the secondary turbocharger 10 is arranged near the right bank 4 of the engine 1, and the primary turbocharger 20 is arranged near the left bank 3. The exhaust ports 11 of the first and third cylinders of the right bank 4 are communicated with one exhaust pipe 13 via an exhaust manifold 12, and the rear end of the exhaust pipe 13 has an exhaust control valve 15. It communicates with the secondary turbocharger 10. Similarly, the exhaust ports 21 of the second and fourth cylinders of the left bank 3 are also communicated with the exhaust pipe 23 via the exhaust manifold 22, and the rear end of the exhaust pipe 23 is directly communicated with the primary turbocharger 20. To be done. The front ends of the exhaust pipes 13 and 23 are connected to a communication pipe 16 that is routed to the lower front portion of the engine 1. Further, the exhaust pipes 14 and 24 on the downstream side of both the superchargers 10 and 20 are gathered into one exhaust pipe 18 at the gathering portion 17 and communicated with the muffler 19 and the like.

【0011】 ここで左の排気マニホールド22は、過給機側に湾曲して形成され、バンク3 からの排気を常に通路抵抗の最も小さい状態で排気管23に導くように連通され る。一方、右バンク4では排気制御弁15の開閉に応じて排気をセカンダリター ボ過給機10、または連通管16を介してプライマリターボ過給機20に導くこ とになり、この場合に排気マニホールド12の連通状態によりいずれか一方を優 先したものになる。そこで低速域のターボ特性を重視して、排気マニホールド1 2が連通管16側に湾曲して形成され、バンク4からの排気を連通管16側に導 く際の通路抵抗を減じた構成になっている。Here, the left exhaust manifold 22 is formed to be curved toward the supercharger side, and is connected so as to always guide the exhaust gas from the bank 3 to the exhaust pipe 23 with the smallest passage resistance. On the other hand, in the right bank 4, depending on whether the exhaust control valve 15 is opened or closed, the exhaust gas is guided to the secondary turbocharger 10 or the primary turbocharger 20 via the communication pipe 16. In this case, the exhaust manifold Depending on the 12 communication states, either one is given priority. Therefore, with an emphasis on the turbo characteristic in the low speed region, the exhaust manifold 12 is formed to be curved toward the communication pipe 16 side, and the passage resistance at the time of guiding the exhaust gas from the bank 4 to the communication pipe 16 side is reduced. ing.

【0012】 また不快音を低減すると共に出力アップするため、最終の集合部17の上流側 の両排気管14,24の間に接続管25が連通され、この接続管25に開閉弁2 6が設けられている。Further, in order to reduce unpleasant noise and increase the output, a connecting pipe 25 is connected between the exhaust pipes 14 and 24 on the upstream side of the final collecting portion 17, and the opening / closing valve 26 is connected to the connecting pipe 25. It is provided.

【0013】 続いて、排気制御弁15と開閉弁26の制御系について説明すると、エンジン 回転数センサ30、ブースト圧センサ31等の信号が制御ユニット32の各動作 モード設定部33,34に入力する。一方の動作モード設定部33は、各運転状 態に応じた動作マップを検索して、低速域で排気制御弁15に閉信号を、中、高 速域で排気制御弁15に開信号を出力する。他方の動作モード設定部34は、低 速域で開閉弁26に開信号を、中、高速域で開閉弁26に閉信号を、スロットル 全開時に開閉弁26に開信号を出力するように構成される。Next, the control system of the exhaust control valve 15 and the opening / closing valve 26 will be described. Signals from the engine speed sensor 30, the boost pressure sensor 31 and the like are input to the operation mode setting units 33 and 34 of the control unit 32. .. One operation mode setting unit 33 retrieves an operation map corresponding to each operation state and outputs a close signal to the exhaust control valve 15 in the low speed range and an open signal to the exhaust control valve 15 in the middle and high speed ranges. To do. The other operation mode setting unit 34 is configured to output an open signal to the open / close valve 26 in the low speed range, a close signal to the open / close valve 26 in the medium / high speed range, and an open signal to the open / close valve 26 when the throttle is fully opened. It

【0014】 次に、本実施例の作用について説明する。エンジン1の運転時に、制御ユニッ ト32の各動作モード設定部33,34で運転状態に応じた動作モードが設定さ れ、低速域では排気制御弁15を閉じて、開閉弁26を開くように制御される。 そこでエンジン1において右バンク4に配置されるセカンダリターボ過給機10 は、排気が排気制御弁15でカットされることで不作動になる。このため右バン ク4の排気ポート11から排出される排気は、実線の矢印のように連通管16の 側に導かれ、左バンク3の排気ポート21から排出される排気に合流してプライ マリターボ過給機20に流入する。こうして低速域の排気エネルギの小さい条件 では、プライマリターボ過給機20のみが左右バンク3,4の排気で効率良く作 動して過給作用するようになる。またこの場合は、右バンク4からの排気が排気 マニホールド12の形状により非常にスムーズにプライマリターボ過給機20に 流入され、この領域の出力特性が図2のように高くなる。Next, the operation of this embodiment will be described. When the engine 1 is in operation, the operation mode setting units 33 and 34 of the control unit 32 set the operation mode according to the operation state. In the low speed range, the exhaust control valve 15 is closed and the on-off valve 26 is opened. Controlled. Therefore, the secondary turbocharger 10 arranged in the right bank 4 of the engine 1 becomes inoperative because the exhaust gas is cut by the exhaust control valve 15. Therefore, the exhaust gas discharged from the exhaust port 11 of the right bank 4 is guided to the side of the communication pipe 16 as indicated by the solid line arrow, merges with the exhaust gas discharged from the exhaust port 21 of the left bank 3, and is connected to the primary turbo. It flows into the supercharger 20. In this way, under the condition of low exhaust energy in the low speed range, only the primary turbocharger 20 is efficiently operated by the exhaust gas of the left and right banks 3 and 4 to perform supercharging action. Further, in this case, the exhaust gas from the right bank 4 flows into the primary turbocharger 20 very smoothly due to the shape of the exhaust manifold 12, and the output characteristic in this region becomes high as shown in FIG.

【0015】 一方、プライマリターボ過給機20から流出する排気は、実線の矢印のように 排気管24を介して排出されるが、このとき開閉弁26が開いているため、排気 圧力Pが、接続管25と他方の排気管14により迂回して集合部17の方に伝達 し、排気圧力Pの位相がずれた状態になる。このため左右バンク3,4から集合 部17までの排気管長の差により排気圧力Pの周波数にハーフ成分を生じても、 そのハーフ成分が排気圧力Pの位相ずれにより打ち消される。これにより排気系 の音圧レベルは、図3の従来の破線の場合に比べて実線のように低下し、不快な 不連続音をほとんど生じなくなる。On the other hand, the exhaust gas flowing out from the primary turbocharger 20 is exhausted through the exhaust pipe 24 as indicated by the solid line arrow. At this time, since the on-off valve 26 is open, the exhaust pressure P is By the connection pipe 25 and the other exhaust pipe 14, it bypasses and is transmitted to the collecting portion 17, and the phase of the exhaust pressure P is shifted. Therefore, even if a half component occurs in the frequency of the exhaust pressure P due to the difference in the exhaust pipe length from the left and right banks 3 and 4 to the collecting portion 17, the half component is canceled by the phase shift of the exhaust pressure P. As a result, the sound pressure level of the exhaust system is lowered as shown by the solid line in comparison with the case of the conventional broken line in FIG. 3, and an unpleasant discontinuous sound is hardly generated.

【0016】 中,高速域の排気エネルギの大きい条件では、逆に排気制御弁15を開いて、 開閉弁26を閉じるように制御される。このためエンジン1において右バンク4 の排気は、破線の矢印のように、排気管13によりセカンダリターボ過給機10 に、左バンク3の排気は排気管23によりプライマリターボ過給機20にそれぞ れ各別に流入する。これにより両過給機10,20がそれぞれ独立して効率良く 作動して、吸気系の全体の過給圧を上昇作用するようになり、図2のように高い 出力特性になる。このとき両過給機10,20から流出する排気は、それぞれ排 気管14,24により排出されるが、各排気管14,24の途中には閉じた開閉 弁26により2分割した接続管25が存在する。このため接続管25が共鳴管と して作用して、特定周波数の音圧が低減される。Under the condition that the exhaust energy is high in the middle and high speed ranges, the exhaust control valve 15 is opened and the on-off valve 26 is closed. Therefore, in the engine 1, the exhaust gas from the right bank 4 is sent to the secondary turbocharger 10 via the exhaust pipe 13 and the exhaust gas from the left bank 3 is sent to the primary turbocharger 20 via the exhaust pipe 23 as indicated by the dashed arrow. It flows in separately. As a result, both the superchargers 10 and 20 operate independently and efficiently to increase the supercharging pressure of the entire intake system, resulting in high output characteristics as shown in FIG. At this time, the exhaust gas flowing out from both the superchargers 10 and 20 is discharged through the exhaust pipes 14 and 24, respectively, but in the middle of each of the exhaust pipes 14 and 24, a connecting pipe 25 divided into two parts by a closed on-off valve 26 is provided. Exists. Therefore, the connecting pipe 25 acts as a resonance pipe, and the sound pressure of a specific frequency is reduced.

【0017】 更にスロットル全開時には、開閉弁26を再び開くように制御される。そこで 上述のように両過給機10,20が作動する状態において、過給機10,20か ら流出するエネルギの比較的大きい排気圧力Pが、接続管25を介して一方から 他方に相互に作用するようになる。このため排気慣性力が増して、出力特性は図 2のように更に高いものになる。Further, when the throttle is fully opened, the opening / closing valve 26 is controlled to be opened again. Therefore, in the state where both superchargers 10 and 20 operate as described above, the exhaust pressure P, which has a relatively large amount of energy flowing out from the superchargers 10 and 20, passes through the connecting pipe 25 from one to the other. To work. For this reason, the exhaust inertial force increases, and the output characteristics become even higher as shown in FIG.

【0018】 以上、本考案の実施例について説明したが、これのみに限定されない。Although the embodiments of the present invention have been described above, the embodiments are not limited thereto.

【0019】[0019]

【考案の効果】[Effect of the device]

以上説明したように、本考案によれば、プライマリとセカンダリの過給機を左 右バンクに分離独立して装備し、両過給機の上流側を連通管で連通し且つ下流側 を集合して構成されるターボ過給機付エンジンにおいて、排気系に開閉弁を備え た接続管が付設され、プライマリターボ過給機のみ作動する場合に排気系の音圧 レベルを低下するように構成されるので、不快な不連続音が無くなる。中,高速 域では接続管が共鳴管として作用するので、この場合の音圧も低減することがで きる。スロットル全開時には接続管により排気慣性力が増大されるので、出力性 能を一層向上することができる。 As described above, according to the present invention, the primary and secondary superchargers are separately installed in the left and right banks, and the upstream sides of both superchargers are connected by the communication pipe and the downstream sides are gathered. In a turbocharged engine configured as follows, a connecting pipe with an on-off valve is attached to the exhaust system, and it is configured to reduce the sound pressure level of the exhaust system when only the primary turbocharger operates. Therefore, the unpleasant discontinuous sound is eliminated. Since the connecting pipe acts as a resonance pipe in the middle and high speed regions, the sound pressure in this case can also be reduced. Since the exhaust gas inertial force is increased by the connecting pipe when the throttle is fully opened, the output performance can be further improved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本考案に係るターボ過給機付エンジンの排気装
置の実施例を示す構成図
FIG. 1 is a configuration diagram showing an embodiment of an exhaust system for a turbocharged engine according to the present invention.

【図2】エンジン運転状態での出力特性を示す図FIG. 2 is a diagram showing output characteristics in an engine operating state.

【図3】低速域での排気系の音圧レベルを示す図FIG. 3 is a diagram showing a sound pressure level of an exhaust system in a low speed range.

【符号の説明】[Explanation of symbols]

1 水平対向式エンジン 3,4 バンク 10 セカンダリターボ過給機 20 プライマリターボ過給機 11,21 排気ポート 12,22 排気マニホールド 13,14,23,24 排気管 15 排気制御弁 16 連通管 17 集合部 25 接続管 26 開閉弁 1 Horizontally opposed engine 3,4 Bank 10 Secondary turbocharger 20 Primary turbocharger 11,21 Exhaust port 12,22 Exhaust manifold 13,14,23,24 Exhaust pipe 15 Exhaust control valve 16 Communication pipe 17 Collecting part 25 Connection pipe 26 Open / close valve

フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 F02D 9/04 G 8820−3G Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display area F02D 9/04 G 8820-3G

Claims (3)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 エンジンの一方のバンクからの排気管が
排気制御弁を有するセカンダリターボ過給機に連通さ
れ、他方のバンクからの排気管がそのままプライマリタ
ーボ過給機に連通され、両排気管が連通管で連通され、
両過給機の流出側が1本の排気管に集合されて、シーケ
ンシャルターボ式に過給作用するターボ過給機付エンジ
ンにおいて、両過給機の流出側の排気管の集合部前に接
続管が連通され、その接続管に開閉弁が設けられること
を特徴とするターボ過給機付エンジンの排気装置。
1. An exhaust pipe from one bank of an engine is connected to a secondary turbocharger having an exhaust control valve, and an exhaust pipe from the other bank is directly connected to a primary turbocharger, and both exhaust pipes are connected. Is connected by a communication pipe,
In a turbocharged engine in which the outflow sides of both turbochargers are gathered into one exhaust pipe to perform supercharging in a sequential turbo manner, a connecting pipe is provided in front of the collecting portion of the exhaust pipes on the outflow side of both superchargers. An exhaust device for an engine with a turbocharger, characterized in that an exhaust valve is provided in the connecting pipe.
【請求項2】 上記開閉弁は、排気制御弁と逆の関係で
開閉し、且つスロットル全開時に再び開くように制御さ
れることを特徴とする請求項1記載のターボ過給機付エ
ンジンの排気装置。
2. The exhaust gas of a turbocharged engine according to claim 1, wherein the on-off valve is controlled to open and close in an inverse relationship with the exhaust control valve and to reopen when the throttle is fully opened. apparatus.
【請求項3】 上記セカンダリターボ過給機に連通され
るバンクの排気マニホールドは、連通管側に通路抵抗の
小さい状態で排気管に接続されることを特徴とする請求
項1記載のターボ過給機付エンジンの排気装置。
3. The turbo supercharger according to claim 1, wherein the exhaust manifold of the bank communicated with the secondary turbocharger is connected to the exhaust pipe with a small passage resistance on the communication pipe side. Exhaust device for engine with engine.
JP507092U 1992-01-14 1992-01-14 Exhaust system for turbocharged engine Pending JPH0558841U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP507092U JPH0558841U (en) 1992-01-14 1992-01-14 Exhaust system for turbocharged engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP507092U JPH0558841U (en) 1992-01-14 1992-01-14 Exhaust system for turbocharged engine

Publications (1)

Publication Number Publication Date
JPH0558841U true JPH0558841U (en) 1993-08-03

Family

ID=11601130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP507092U Pending JPH0558841U (en) 1992-01-14 1992-01-14 Exhaust system for turbocharged engine

Country Status (1)

Country Link
JP (1) JPH0558841U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101293813B1 (en) * 2011-05-02 2013-08-06 현대중공업 주식회사 Flow control device of an exhaust gas on vee-engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101293813B1 (en) * 2011-05-02 2013-08-06 현대중공업 주식회사 Flow control device of an exhaust gas on vee-engine

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