JPH0563611B2 - - Google Patents
Info
- Publication number
- JPH0563611B2 JPH0563611B2 JP24238585A JP24238585A JPH0563611B2 JP H0563611 B2 JPH0563611 B2 JP H0563611B2 JP 24238585 A JP24238585 A JP 24238585A JP 24238585 A JP24238585 A JP 24238585A JP H0563611 B2 JPH0563611 B2 JP H0563611B2
- Authority
- JP
- Japan
- Prior art keywords
- intake
- supercharger
- engine
- passage
- branch
- 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 - Lifetime
Links
- 230000010349 pulsation Effects 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 15
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Supercharger (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、吸気通路の下流部が複数の分岐通路
に分岐され、各分岐通路にそれぞれ容積型の過給
機が配設された複数の過給機を有するエンジンに
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention provides a plurality of air intake passages in which the downstream part of an intake passage is branched into a plurality of branch passages, and each branch passage is provided with a positive displacement supercharger. The present invention relates to an engine having a supercharger.
（従来技術）
従来、エンジンの過給装置としてエンジンの吸
気系にターボ過給機を設けたものでは、エンジン
の低速時に排気流量が少ないために過給不足を生
じ易く、出力性能の向上を十分に図ることができ
ない場合がある。このため、特開昭58−51221号
公報に示されるように、エンジンの吸気系を主吸
気系と補助吸気系とで構成し、補助吸気系にエン
ジンによつて駆動される容積型の過給機を配設
し、エンジンの低回転域においても上記過給機に
より過給不足を生じることなく吸気過給を行なう
とともに、容積量の過給機を使用することによつ
て生じる吸気脈動がエンジンに対して影響を与え
るのを防止するために上記過給機の過給気吐出タ
イミングをエンジンの作動行程に同期させるよう
にしたものが知られている。(Prior art) Conventionally, when a turbo supercharger is installed in the engine intake system as an engine supercharging device, the exhaust flow rate is small at low speeds of the engine, which tends to cause insufficient supercharging, and it is difficult to improve output performance sufficiently. In some cases, it may not be possible to achieve this goal. For this reason, as shown in Japanese Patent Application Laid-Open No. 58-51221, the engine intake system is composed of a main intake system and an auxiliary intake system, and the auxiliary intake system is equipped with a positive displacement supercharger driven by the engine. The supercharger performs intake supercharging without causing insufficient supercharging even in the low engine speed range, and the intake pulsation caused by using a volumetric supercharger can be It is known that the supercharger discharge timing of the supercharged air is synchronized with the operating stroke of the engine in order to prevent this from affecting the engine.
上記補助吸気系に単一の容積型過給機を設けた
ものでは、過給気吐出タイミングをエンジンの作
動行程に同期させることにより、吸気脈動による
影響を排除してエンジンに過給気を効率よく供給
することが可能となるが、吸気系の上流部に設け
たエアフローメータに対する上記吸気脈動の影響
を防ぐことができない。また、排気量の大きいエ
ンジン等において複数個の過給機を設けることが
行なわれているが、この場合には各過給機により
生じる吸気脈動の共振作用によつて上記エアフロ
ーメータに及ぼす影響がより大きくなるととも
に、吸気音も大きくなるためにこれに対する対策
が必要となる。 In the above-mentioned auxiliary intake system equipped with a single positive displacement supercharger, by synchronizing the supercharged air discharge timing with the engine operating stroke, the influence of intake pulsation is eliminated and supercharged air is delivered to the engine efficiently. Although it becomes possible to supply a good amount of air, it is not possible to prevent the influence of the intake pulsation on the air flow meter provided at the upstream part of the intake system. In addition, multiple superchargers are installed in engines with large displacements, but in this case, the resonance effect of the intake pulsation generated by each supercharger has an effect on the air flow meter. As the intake noise becomes louder, the intake noise also becomes louder, so countermeasures are required to deal with this.
（発明の目的）
本発明は、上記の点に鑑みてなされたものであ
り、複数の容積型過給機を有するエンジンにおい
て、吸気通路の上流部に設けたエアフローメータ
等の吸入空気量の検出手段に対する上記過給機の
影響を防止し、常に正確に吸入空気量を検出でき
るようにするとともに、簡単な構成で各過給機の
吸気脈動によつて生じる騒音を抑制できるように
することを目的としている。(Object of the Invention) The present invention has been made in view of the above points, and is a method for detecting the intake air amount using an air flow meter or the like provided at the upstream portion of the intake passage in an engine having a plurality of positive displacement superchargers. It is an object of the present invention to prevent the influence of the above-mentioned supercharger on the means, to always be able to accurately detect the amount of intake air, and to suppress the noise caused by the intake pulsation of each supercharger with a simple configuration. The purpose is
（発明の構成）
本発明は、吸気通路の上流部に吸入空気量の検
出手段を設けるとともに、吸気通路の下流部を複
数の分岐通路に分岐させて各分岐通路にそれぞれ
容積型の過給機を配設し、各過給機が作動するこ
とにより生じる吸気脈動が互いに打消し合うよう
に各過給機の作動位相を設定してなるものであ
る。(Structure of the Invention) The present invention provides an intake air amount detection means in the upstream part of the intake passage, and branches the downstream part of the intake passage into a plurality of branch passages, and a positive displacement supercharger is installed in each branch passage. The operating phase of each supercharger is set so that the intake pulsations caused by the operation of each supercharger cancel each other out.
この構成により、各過給機による吸気脈動が互
いに打消し合う結果、吸気通路上流部における吸
気圧力の変動が減少し、吸入空気量の検出手段に
及ぼす影響が軽減されるとともに、騒音の発生を
抑制することができる。 With this configuration, the intake pulsations from each turbocharger cancel each other out, reducing fluctuations in intake pressure at the upstream portion of the intake passage, reducing the effect on the intake air amount detection means, and reducing noise generation. Can be suppressed.
（実施例）
第１図において、１はエンジンであり、このエ
ンジン１はシリンダ２と、このシリンダ２内を往
復動するピストン３と、このピストン３にコンロ
ツド４を介して連結されたクランクシヤフト５と
を備えている。上記エンジン１の燃焼室には吸気
通路６が接続されている。この吸気通路６の上流
端はエアクリーナ７に接続され、その下流側には
エアフローメータからなる吸入空気量の検出手段
８が配設されている。この検出手段８の下流部の
吸気通路６は二つの分岐通路９，１０に分岐さ
れ、各分岐通路９，１０にはベーンポンプ、トロ
コイドポンプ、ルーツブロア等からなる容積型の
過給機１１，１２がそれぞれ配設されるととも
に、リリーフ弁１３を有するリリーフ通路１４，
１５が形成されている。(Example) In FIG. 1, 1 is an engine, and this engine 1 includes a cylinder 2, a piston 3 that reciprocates within the cylinder 2, and a crankshaft 5 connected to the piston 3 via a connecting rod 4. It is equipped with An intake passage 6 is connected to the combustion chamber of the engine 1. The upstream end of this intake passage 6 is connected to an air cleaner 7, and on the downstream side thereof, intake air amount detection means 8 consisting of an air flow meter is provided. The intake passage 6 downstream of the detection means 8 is branched into two branch passages 9 and 10, and each branch passage 9 and 10 is equipped with a positive displacement supercharger 11 and 12 consisting of a vane pump, a trochoid pump, a Roots blower, etc. relief passages 14 each having a relief valve 13;
15 is formed.
また、上記分岐通路９，１０の下流端の合流部
はサージタンク１６に接続され、その下流部の吸
気通路６にはスロツトル弁１７および燃料噴射弁
１８が順次配設されている。上記吸入空気量の検
出手段８からの検出信号およびスロツトル弁１７
の開度検出手段からの検出信号、クランクシヤフ
ト５の回転数検出手段からの検出信号がそれぞれ
制御回路１９に入力されてエンジンの運転状態が
判別され、この制御回路１９からエンジン１の運
転状態に応じて燃料の噴射量を調節する制御信号
が燃料噴射弁１８に出力される。 Further, the downstream end confluence of the branch passages 9 and 10 is connected to a surge tank 16, and a throttle valve 17 and a fuel injection valve 18 are sequentially arranged in the intake passage 6 at the downstream side. Detection signal from the intake air amount detection means 8 and throttle valve 17
The detection signal from the opening detection means of the crankshaft 5 and the detection signal from the rotation speed detection means of the crankshaft 5 are respectively input to the control circuit 19 to determine the operating state of the engine. A control signal is output to the fuel injection valve 18 to adjust the amount of fuel to be injected accordingly.
上記過給機１１，１２は、駆動軸２０，２１お
よびチエーン機構２２，２３を介してエンジン１
のクランクシヤフト５に接続され、このクランク
シヤフト５によつて回転駆動されて互いに同周期
で吸入と吐出を繰り返すように構成されている。
そして上記各過給機１１，１２の作動位相すなわ
ち各過給機１１，１２の吸入および吐出のタイミ
ングを互いにずらすことにより、分岐通路９，１
０の位置Ａ，Ｂに作用する吸気脈動の位相が第２
図に示すように、互いに180゜（1/2周期）ずれるよ
うに設定されている。 The superchargers 11 and 12 are connected to the engine 1 through drive shafts 20 and 21 and chain mechanisms 22 and 23.
The pump is connected to a crankshaft 5, and is rotationally driven by the crankshaft 5, so that suction and discharge are repeated at the same cycle.
By shifting the operating phases of the superchargers 11 and 12, that is, the suction and discharge timings of the superchargers 11 and 12, the branch passages 9 and 1
The phase of the intake pulsation acting on positions A and B at 0 is the second
As shown in the figure, they are set to be offset by 180 degrees (1/2 cycle) from each other.
このように、上記過給機１１，１２によつて生
じる吸気脈動の位相が互いに1/2周期ずれるよう
に設定されているため、各分岐通路９，１０の上
流に位置する分岐上流部Ｃにおいては上記吸気脈
動が互いに打消し合うように作用して吸気圧力の
変動が著しく減少する。したがつて、上記吸入空
気量の検出手段８が吸気脈動の影響を受けて誤作
動するのを防止し、吸入空気量の正確な検出が可
能となる。また、上記吸気脈動が互いに打消し合
うように作用し、共振作用によつて吸気騒音が増
幅されるのを防止できるため、特別な防音装置を
設けることなく騒音対策が可能となる。 In this way, the phases of the intake pulsations generated by the superchargers 11 and 12 are set to be shifted by 1/2 period from each other, so that in the branch upstream section C located upstream of each branch passage 9 and 10, The above-mentioned intake pulsations act to cancel each other out, and fluctuations in intake pressure are significantly reduced. Therefore, the intake air amount detection means 8 is prevented from malfunctioning due to the influence of intake pulsation, and the intake air amount can be accurately detected. Further, the intake pulsations act to cancel each other out, and the intake noise can be prevented from being amplified due to resonance, so that noise countermeasures can be taken without providing a special soundproofing device.
上記実施例のように各過給機１１，１２の吸
入、吐出のタイミングを互いにずらせることによ
り分岐上流部Ｃにおいて吸気脈動を互いに打消し
合うように作動させた場合には、上記分岐上流部
Ｃから各過給機１１，１２に至る分岐通路９，１
０の長さおよび径を同一に設定する必要がある。 In the case where the intake pulsations of the superchargers 11 and 12 are shifted from each other to cancel out the intake pulsations in the upstream branch C as in the above embodiment, the upstream branch C Branch passages 9, 1 leading from C to each supercharger 11, 12
It is necessary to set the length and diameter of 0 to be the same.
なお、上記実施例では二基の過給機１１，１２
を設けた場合について説明したが、三基以上の過
給機を設けた構造としてもよい。例えば、三基の
過給機を設けたものでは、各過給機の吸気脈動の
位相をそれぞれ120゜ずつずらすことにより、吸気
脈動を互いに打消し合うように作用させればよ
い。また四基の過給機を設けたものでは、相対応
する二基の過給機の位相をそれぞれ180゜ずつずら
せるようにしてもよく、あるいは各過給機の位相
を90゜ずつずらすようにしてもよい。 In addition, in the above embodiment, two superchargers 11 and 12 are used.
Although the case in which three or more superchargers are provided has been described, a structure may be adopted in which three or more superchargers are provided. For example, in a system with three superchargers, the phases of the intake pulsations of each supercharger may be shifted by 120 degrees so that the intake pulsations cancel each other out. In addition, in a system with four turbochargers, the phases of two corresponding turbochargers may be shifted by 180 degrees, or the phases of each turbocharger may be shifted by 90 degrees. You can also do this.
（発明の効果）
以上説明したように本発明は、吸気通路の下流
部を複数の分岐通路に分岐させるとともに、各分
岐通路にそれぞれ容積型の過給機を配設し、各過
給機による吸気脈動が互いに打消し合うように各
過給機の作動位相を設定したため、吸気通路の上
流部における吸気圧力が変動するのを効果的に抑
制でき、吸入空気量の検出手段による正確な検出
が可能となつて燃料噴射弁の制御回路等に正確な
検出値を入力して適正な制御を行なうことができ
る。また、各過給機による吸気脈動が共振して吸
気騒音が増幅されるのを防止できるため、特別な
防音処理を施すことなく簡単な構成で吸気騒音を
抑制できるという効果がある。(Effects of the Invention) As explained above, the present invention branches the downstream part of the intake passage into a plurality of branch passages, and each branch passage is provided with a positive displacement supercharger, and each supercharger Since the operating phases of each supercharger are set so that the intake pulsations cancel each other out, fluctuations in the intake pressure in the upstream part of the intake passage can be effectively suppressed, and accurate detection by the intake air amount detection means is possible. This makes it possible to input accurate detected values into the control circuit of the fuel injection valve and perform appropriate control. Furthermore, since it is possible to prevent the intake noise from being amplified due to the resonance of the intake pulsation caused by each supercharger, there is an effect that the intake noise can be suppressed with a simple configuration without any special soundproofing treatment.
第１図は本発明の実施例を示す全体概略図、第
２図は各過給機の吸入圧力と位相との関係を示す
説明図である。
１……エンジン、６……吸気通路、８……吸入
空気量の検出手段、９，１０……分岐通路、１
１，１２……過給機。
FIG. 1 is an overall schematic diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the relationship between suction pressure and phase of each supercharger. DESCRIPTION OF SYMBOLS 1... Engine, 6... Intake passage, 8... Intake air amount detection means, 9, 10... Branch passage, 1
1,12...Supercharger.
Claims (1)
設けるとともに、吸気通路の下流部を複数の分岐
通路に分岐させて各分岐通路にそれぞれ容積型の
過給機を配設し、各過給機が作動することにより
生じる吸気脈動が互いに打消し合うように各過給
機の作動位相を設定してなることを特徴とする複
数の過給機を有するエンジン。1.In addition to providing an intake air amount detection means in the upstream part of the intake passage, the downstream part of the intake passage is branched into a plurality of branch passages, and a positive displacement supercharger is disposed in each branch passage, so that each supercharging An engine having a plurality of superchargers, characterized in that the operating phases of each supercharger are set so that intake pulsations caused by engine operation cancel each other out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24238585A JPS62101830A (en) | 1985-10-28 | 1985-10-28 | Engine having plural supercharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24238585A JPS62101830A (en) | 1985-10-28 | 1985-10-28 | Engine having plural supercharger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62101830A JPS62101830A (en) | 1987-05-12 |
| JPH0563611B2 true JPH0563611B2 (en) | 1993-09-10 |
Family
ID=17088373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24238585A Granted JPS62101830A (en) | 1985-10-28 | 1985-10-28 | Engine having plural supercharger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62101830A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9534531B2 (en) | 2011-09-30 | 2017-01-03 | Eaton Corporation | Supercharger assembly for regeneration of throttling losses and method of control |
| WO2013049439A2 (en) * | 2011-09-30 | 2013-04-04 | Eaton Corporation | Supercharger assembly with two rotor sets |
| WO2013049438A2 (en) * | 2011-09-30 | 2013-04-04 | Eaton Corporation | Supercharger assembly with independent superchargers and motor/generator |
| JP6185555B2 (en) | 2012-03-29 | 2017-08-23 | イートン コーポレーションＥａｔｏｎ Ｃｏｒｐｏｒａｔｉｏｎ | Variable speed hybrid electric supercharger assembly and vehicle control method having the same |
| EP2971640B1 (en) | 2013-03-12 | 2020-05-06 | Eaton Corporation | Adaptive state of charge regulation and control of variable speed hybrid electric supercharger assembly for efficient vehicle operation |
-
1985
- 1985-10-28 JP JP24238585A patent/JPS62101830A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62101830A (en) | 1987-05-12 |
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