JPS6034749Y2 - Intake system for turbocharged engine - Google Patents
Intake system for turbocharged engineInfo
- Publication number
- JPS6034749Y2 JPS6034749Y2 JP14373880U JP14373880U JPS6034749Y2 JP S6034749 Y2 JPS6034749 Y2 JP S6034749Y2 JP 14373880 U JP14373880 U JP 14373880U JP 14373880 U JP14373880 U JP 14373880U JP S6034749 Y2 JPS6034749 Y2 JP S6034749Y2
- Authority
- JP
- Japan
- Prior art keywords
- passage
- intake
- air
- engine
- blower
- 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.)
- Expired
Links
Landscapes
- Supercharger (AREA)
- Exhaust Gas After Treatment (AREA)
Description
【考案の詳細な説明】
本考案は、排気通路に介装されたタービンにより吸気通
路に介装されたブロアを駆動して吸気過給するターボ過
給機付エンジンの吸気装置の改良に関するものである。[Detailed description of the invention] The present invention relates to an improvement in an intake system for a turbocharged engine that supercharges intake air by driving a blower installed in an intake passage by a turbine installed in an exhaust passage. be.
従来より、この種のターボ過給機付エンジンは公知であ
り（例えば実開昭５４−６９２０８号公報参照）、排気
ガスの動力エネルギを利用して吸気過給することにより
、効率的にエンジンの力性能の向上を図ることができる
利点がある。This type of turbocharged engine has been known (see, for example, Japanese Utility Model Application Publication No. 54-69208), and it efficiently operates the engine by supercharging the intake air using the power energy of the exhaust gas. This has the advantage of improving force performance.
しかしながら、エンジンの運転範囲はきわめて広範囲に
亘っており、通常は高速高負荷領域で過給効率が過剰と
ならないようにタービン側の性能を設定している。However, the operating range of an engine is extremely wide, and the performance of the turbine is usually set so that supercharging efficiency does not become excessive in a high-speed, high-load region.
上記の如く、タービンの出力性能を高速高負荷域で要求
される性能に合わせて設定した場合には逆に低速側、と
くに排気流量の少ない低速高負荷域タービンの出力が不
足し、この力域におけるエンジンの出力性能を有効に向
上しえない難点を生ずるといった問題がある。As mentioned above, if the output performance of the turbine is set according to the performance required in the high-speed, high-load range, the output of the turbine will be insufficient on the low-speed side, especially in the low-speed, high-load range with low exhaust flow, and However, there is a problem in that the output performance of the engine cannot be effectively improved.
本考案は上記問題に鑑みてなされたものであって、エン
ジンの低速低置荷時排気通路に二次空気を供給する二次
空気供給系を利用し、二次空気の供給が不要となるエン
ジンの低速高負荷時ニハ、この二次空気を利用してブロ
アの効率を向上させることにより、低速高負荷域でのエ
ンジンの出力性能の向上を図るようにした過給機付エン
ジンの吸気装置を提供することを目的としている。The present invention was developed in view of the above problems, and uses a secondary air supply system that supplies secondary air to the exhaust passage when the engine is running at low speeds and with low loads, thereby eliminating the need for supplying secondary air to the engine. The intake system for supercharged engines is designed to improve the engine's output performance at low speeds and high loads by using this secondary air to improve the efficiency of the blower. is intended to provide.
即ち、本考案に係るターボ過給機付エンジンの吸気装置
においては、エンジンにより駆動されるエアポンプによ
り供給される二次空気を少なくともエンジンの低速高負
荷時にリリーフさせるリリーフ通路をブロア上流の吸気
通路に開口させるようにし、その場合、リリーフ通路は
ブロアの回転方向かつ吸気通路の接線方向に向けて開口
させることにより、吸気通路にリリーフする二次空気に
よって吸入空気を旋回流とし、ブロアへの吸入空気の流
入をスムーズにするようにしたことを特徴としている。That is, in the intake system for a turbocharged engine according to the present invention, a relief passage for relieving secondary air supplied by an air pump driven by the engine at least when the engine is running at low speed and under high load is provided in the intake passage upstream of the blower. In this case, by opening the relief passage in the rotational direction of the blower and in the tangential direction of the intake passage, the secondary air relieved in the intake passage creates a swirl flow of the intake air, and the intake air flows into the blower. It is characterized by smooth inflow of people.
以下、図示の実施例に基づいて本考案をより具体的に説
明する。Hereinafter, the present invention will be described in more detail based on illustrated embodiments.
第１図において、１はエンジン、２はエンジン１の吸気
通路、３はエンジン１の排気通路、４は吸気通路２に介
設したブロア５を排気通路３に介設したタービン６によ
り駆動することにより吸気過給するターボ過給機、７は
吸気通路２の上流に設置した吸入空気量を検出するため
のエアフローメータ、８はエアフローメータ７によって
検出された吸入空気量に応じてコンピュータ９により燃
料噴射量が制御される燃料噴射弁、１０はブロア５下流
の吸気通路２に介設され、アクセルペダル（図示せず）
に連動して開閉されるスロットルバルブである。In FIG. 1, 1 is an engine, 2 is an intake passage of the engine 1, 3 is an exhaust passage of the engine 1, and 4 is a blower 5 disposed in the intake passage 2, which is driven by a turbine 6 disposed in the exhaust passage 3. 7 is an air flow meter installed upstream of the intake passage 2 to detect the amount of intake air; 8 is a turbo supercharger that supercharges intake air by a computer 9 according to the amount of intake air detected by the air flow meter 7; A fuel injection valve 10 whose injection amount is controlled is installed in the intake passage 2 downstream of the blower 5, and is connected to an accelerator pedal (not shown).
This is a throttle valve that opens and closes in conjunction with the
一方、１１はエンジン１の出力軸（図示せず）により駆
動されるエアポンプ、１２はエアポンプ１１により送給
される空気を排気通路３のタービン６下流に排気ガス浄
化用の二次空気として供給する二次空気供給通路、１３
は二次空気供給通路１２の途中に設けた三方切換弁より
なる二次空気コントロール弁、１４は二次空気コントロ
ール弁１３の入口ポート１３ａに対して相反的に切換え
られる２つの出口ポート１３ｂ、１３ｃのうち、二次空
気供給通路１２側の出口ポート１３ｂとは異なるいま一
つの出口ポート１３ｃに上流が連結され、下流がブロア
５上流の吸気通路２に開口したリリーフ通路、１５はエ
アポンプ１１の吸込側に出口ポート１５ｃを連結した空
気取入源を二次空気コントロール弁１３の切換え動作に
連動して切換えるための三方切換弁よりなる空気源切換
弁で、この空気源切換弁１５の一方の入口ポート１５ａ
は大気に連通し、他方の入口ポート１５ｂはエアフロー
メータ７下流の吸気通路２に連通している。On the other hand, 11 is an air pump driven by the output shaft (not shown) of the engine 1, and 12 is for supplying the air supplied by the air pump 11 to the downstream side of the turbine 6 in the exhaust passage 3 as secondary air for exhaust gas purification. Secondary air supply passage, 13
14 is a secondary air control valve consisting of a three-way switching valve provided in the middle of the secondary air supply passage 12, and 14 is two outlet ports 13b and 13c which are switched reciprocally with respect to the inlet port 13a of the secondary air control valve 13. Of these, the upstream side is connected to another outlet port 13c different from the outlet port 13b on the side of the secondary air supply passage 12, and the downstream side is a relief passage opened to the intake passage 2 upstream of the blower 5, and 15 is a relief passage for the air pump 11. This is an air source switching valve consisting of a three-way switching valve for switching the air intake source connected to the outlet port 15c in conjunction with the switching operation of the secondary air control valve 13.One inlet of the air source switching valve 15 Port 15a
communicates with the atmosphere, and the other inlet port 15b communicates with the intake passage 2 downstream of the air flow meter 7.
上記二次空気コントロール弁１３と空気源切換弁１５と
は、エンジン１の低速低負荷運転時、第１図に図示する
ように、大気から取入れた空気をエアポンプ１１により
加圧したうえで、二次空気供給通路１２によりタービン
６下流の排気通路３に二次空気として供給し、排気通路
３のタービン６下流に設けた織媒等の排気ガス浄化装置
（図示せず）において排気ガスを浄化する一方、エンジ
ン１の低速高負荷運転時および高速運転時には、両弁１
３，１５は同時に切換えられ、エアフローメータ７によ
って計量された吸入空気の一部をエアポンプ１１により
加圧し、加圧した空気を二次空気供給通路１２の上流側
およびＩＪ ＩＪ−フ通路１４を通してブロア５上流の
吸気通路２に供給する。The secondary air control valve 13 and the air source switching valve 15 are used to pressurize air taken in from the atmosphere with the air pump 11, and Secondary air is supplied as secondary air to the exhaust passage 3 downstream of the turbine 6 through the secondary air supply passage 12, and the exhaust gas is purified in an exhaust gas purification device (not shown) such as a weaving medium provided downstream of the turbine 6 in the exhaust passage 3. On the other hand, during low-speed, high-load operation and high-speed operation of engine 1, both valves 1
3 and 15 are switched simultaneously, a part of the intake air measured by the air flow meter 7 is pressurized by the air pump 11, and the pressurized air is passed through the upstream side of the secondary air supply passage 12 and the IJ-F passage 14 to the blower. 5 Supplied to the upstream intake passage 2.
上記の如く、エンジン１の低速高負荷運転時および高速
運転時、ブロア５上流の吸気通路２に加圧空気を供給す
るリリーフ通路１４は、ブロア５の回転方向と同じ方向
の旋回流Ｓを生じるように、第２図に示すように、吸気
通路２の壁面に対してその接線方向に開口させ、この旋
回流Ｓによってブロア５への吸入空気の流入をスムーズ
にする。As described above, during low speed, high load operation and high speed operation of the engine 1, the relief passage 14 that supplies pressurized air to the intake passage 2 upstream of the blower 5 generates a swirling flow S in the same direction as the rotation direction of the blower 5. As shown in FIG. 2, the intake passage 2 is opened tangentially to the wall surface of the intake passage 2, and the swirling flow S allows intake air to smoothly flow into the blower 5.
この場合、旋回流Ｓは吸入空気量が比較的少なく、吸入
空気の大部分がエアポンプ１１により二次空気供給通路
１２およびＩＪ ＩＪ−７通路１４を通して吸気通路２
に供給されるエンジンの低速高負荷運転時に、最もその
動力が大きくなり、この段階では不足勝ちなタービン６
の出力を補なうように、ブロア５への吸入空気の流入を
スムーズにし、ブロア５の効率を向上させて吸気過給の
実をあげることができる。In this case, the amount of intake air in the swirling flow S is relatively small, and most of the intake air is sent to the intake passage 2 by the air pump 11 through the secondary air supply passage 12 and the IJ IJ-7 passage 14.
The power is greatest during low speed and high load operation of the engine supplied to the engine, and at this stage the turbine 6
In order to compensate for the output of
一方、エンジン１の高速運転域では、吸気通路２を直接
に流下する吸入空気の流れが十分に強くなり、旋回流Ｓ
は実質上形成されないか、形成されたとしても弱くなる
が、この段階では、十分大きくなっているタービン６の
出力によってブロア５は高速駆動され、必要な吸気過給
を行なう。On the other hand, in the high-speed operating range of the engine 1, the flow of intake air directly flowing down the intake passage 2 becomes sufficiently strong, and the swirling flow S
is not substantially formed, or even if it is formed, it is weak, but at this stage, the blower 5 is driven at high speed by the sufficiently large output of the turbine 6 to perform the necessary intake air supercharging.
以上の説明から明らかなように、本考案は、ターボ過給
機付エンジンにおける二次空気供給系の二次空気のＩＪ
ＩＪ−フ通路をブロア上流の吸気通路に、ブロアの回
転方向で、かつ吸気通路の接線方向に開口させ、タービ
ン出力が不足するエンジンの低速高負荷運転時に、ブロ
ア上流に旋回流を作用させることにより、ブロアの効率
をたかめて有効な吸気過給を行ない、低速高負荷運転時
のエンジンの出力性能を向上させることができるターボ
過給機付エンジンの吸気装置を提供するものである。As is clear from the above description, the present invention provides an IJ for secondary air in a secondary air supply system in a turbocharged engine.
The IJ-F passage is opened in the intake passage upstream of the blower in the rotational direction of the blower and in the tangential direction of the intake passage, and a swirling flow is applied to the upstream side of the blower during low-speed, high-load operation of the engine when the turbine output is insufficient. Accordingly, there is provided an intake system for a turbocharged engine that can increase the efficiency of the blower, perform effective intake supercharging, and improve the output performance of the engine during low-speed, high-load operation.
本考案によれば、従来、低速低負荷運転以外の運転時、
単に大気にリリーフしていたにすぎない二次空気を利用
して、とくに低速高負荷運転時にブロアへの吸入空気の
流入をスムーズにする旋回流を生皮することができ、タ
ービン出力の不足を補なって、この運転域におけるエン
ジンの出力性能の向上を図り、この種ターボ過給機の有
効領域を低速高負荷域まで簡単な構造上の改良によって
拡大することができる利点が得られる。According to the present invention, conventionally, during operation other than low speed and low load operation,
By using the secondary air that was simply released to the atmosphere, it is possible to create a swirling flow that smooths the intake air into the blower, especially during low-speed, high-load operation, and compensates for the lack of turbine output. Therefore, it is possible to improve the output performance of the engine in this operating range and to extend the effective range of this type of turbocharger to the low speed and high load range by simple structural improvements.
第１図は、本考案の一実施例に係るターボ過給機付エン
ジンの吸気装置の全体概略説明図、第２図は第１図のＡ
−Ａ’線方向断面図である。
１・・・・・・エンジン、２・・・・・・吸気通路、３
・・・・・・排気通路、４・・・・・・ターボ過給機、
５・・・・・・ブロア、６・・・・・・タービン、１１
・・・・・・エアポンプ、１２・・・・・・二次空気供
給通路、１３・・・・・・二次空気コントロール弁、１
４・・・・・・リリーフ通路。FIG. 1 is an overall schematic explanatory diagram of an intake system for a turbocharged engine according to an embodiment of the present invention, and FIG. 2 is an A of FIG. 1.
-A' line direction sectional view. 1...Engine, 2...Intake passage, 3
...Exhaust passage, 4...Turbo supercharger,
5...Blower, 6...Turbine, 11
...Air pump, 12...Secondary air supply passage, 13...Secondary air control valve, 1
4... Relief passage.
Claims (1)
れたブロアを駆動して吸気過給するターボ過給機を備え
る一方、エンジン出力軸に連結されたエアポンプにより
排気通路に二次空気を供給する二次空気供給通路と、少
なくともエンジンの低速高負荷時に上記二次空気をＩＪ
Ｉ）−フさせるリリーフ通路とを備えたターボ過給機
付エンジンにおいて、 上記ＩＪ ＩＪ−フ通路を上記ブロア上流の吸気通路内
にブロアの回転方向かつ吸気通路の接線方向に向けて開
口したことを特徴とするターボ過給機付エンジンの吸気
装置。[Claims for Utility Model Registration] A turbocharger is provided for supercharging intake air by driving a blower installed in an intake passage by a turbine installed in an exhaust passage, while an air pump connected to an engine output shaft drives a blower installed in an intake passage to supercharge intake air. A secondary air supply passage that supplies secondary air to the exhaust passage, and a secondary air supply passage that supplies the secondary air to the IJ at least when the engine is running at low speed and under high load.
I) In a turbocharged engine equipped with a relief passage for opening the IJ-F passage, the IJ-F passage is opened in the intake passage upstream of the blower in the rotational direction of the blower and in the tangential direction of the intake passage. An intake system for an engine equipped with a turbocharger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14373880U JPS6034749Y2 (en) | 1980-10-07 | 1980-10-07 | Intake system for turbocharged engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14373880U JPS6034749Y2 (en) | 1980-10-07 | 1980-10-07 | Intake system for turbocharged engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5766229U JPS5766229U (en) | 1982-04-20 |
| JPS6034749Y2 true JPS6034749Y2 (en) | 1985-10-16 |
Family
ID=29503475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14373880U Expired JPS6034749Y2 (en) | 1980-10-07 | 1980-10-07 | Intake system for turbocharged engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6034749Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57159920A (en) * | 1981-03-30 | 1982-10-02 | Komatsu Ltd | Intake device for engine with turbocharger |
| EP2960528B1 (en) * | 2013-02-22 | 2018-12-12 | Mitsubishi Heavy Industries, Ltd. | Centrifugal compressor |
-
1980
- 1980-10-07 JP JP14373880U patent/JPS6034749Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5766229U (en) | 1982-04-20 |
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