JPS5810113A - Intake device for engine - Google Patents
Intake device for engineInfo
- Publication number
- JPS5810113A JPS5810113A JP56109655A JP10965581A JPS5810113A JP S5810113 A JPS5810113 A JP S5810113A JP 56109655 A JP56109655 A JP 56109655A JP 10965581 A JP10965581 A JP 10965581A JP S5810113 A JPS5810113 A JP S5810113A
- Authority
- JP
- Japan
- Prior art keywords
- load
- intake
- low
- intake passage
- passage
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、エンジンの吸気装置に関し、特に低負荷用吸
気通路と高負荷用吸気通路とを備えたデュアル吸気シス
テムに過給機を装備するようにしたものに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake system for an engine, and more particularly to one in which a dual intake system including a low-load intake passage and a high-load intake passage is equipped with a supercharger.
従来より、エンジンの燃焼室に低負荷用吸気通路および
高負荷用吸気通路を各々開口させ、低負荷運転時には低
負荷用吸気通路のみから吸気を供給することにより、吸
気の流速を速めて燃焼性を向上させる一方、高負荷運転
時には高負荷用吸気通路からも吸気を供給するととＫよ
シ、良好な出力性能を確保するようにしたいわゆるデュ
アル吸気システムはよく知られている（例えば特公昭５
１−／１９０９４号公報参照）。Conventionally, a low-load intake passage and a high-load intake passage are opened in the combustion chamber of an engine, and intake air is supplied only from the low-load intake passage during low-load operation, thereby increasing the flow rate of intake air and improving combustibility. The so-called dual intake system is well known (e.g., the so-called dual intake system that ensures good output performance by supplying intake air from the high-load intake passage during high-load operation).
1-/19094).
しかし、上記デュアル吸気シ、ステムにおいては高負荷
運転時、低負荷用吸気通路と高負荷吸気通路とを仕切る
仕切壁の存在により、通常の単一の吸気通路を備えたも
のと較べて、出力性能が低下するという問題があった。However, in the dual intake system and stem described above, during high-load operation, due to the presence of a partition wall that separates the low-load intake passage and the high-load intake passage, the output is lower than that of a system with a normal single intake passage. There was a problem that performance deteriorated.
そこで、本発明は斯かる点に鑑み、上記のようなデュア
ル吸気システムに対し、高負荷運転時に作動して吸気の
充填効率を高める過給機を装備するようにすることによ
り、デュアル吸気システムの特長（低負荷運転時の燃焼
性の向上）を活かしつつ、高負荷運転時の出力性能の向
上を図るようＫしたエンジンの吸気装置を提供す゛るも
のである。In view of this, the present invention has been developed to improve the efficiency of the dual intake system by equipping the dual intake system as described above with a supercharger that operates during high-load operation to increase the intake air filling efficiency. The purpose of the present invention is to provide an intake system for an engine that is designed to take advantage of its features (improved combustibility during low-load operation) while improving output performance during high-load operation.
その場合、上記過給機を低負荷用吸気通路に設けると、
高負荷運転時、低負荷用吸気通路内の吸気の流速が速く
なりすぎ、その結果、燃焼騒音が大きくなるという不具
合が生じる。In that case, if the above-mentioned supercharger is installed in the low-load intake passage,
During high-load operation, the flow velocity of intake air in the low-load intake passage becomes too fast, resulting in a problem of increased combustion noise.
そのため、本発明においては、低負荷用吸気通路および
高負荷用吸気通路を各々燃焼室に開口させ、該高負荷用
吸気通路に過給機を装着することにより、低負荷運転時
の燃焼性の向上を図シつつ、燃焼騒音の増大を招くこと
なく高負荷運転時の出力性能の向上を図るようにすると
とも′に、上記低負荷用吸気通路に逆止弁を設けること
により、上記過給機の作動時、低負荷用吸気通路への吸
気の吹返しを防止するようにしたことを特徴とする。Therefore, in the present invention, the low-load intake passage and the high-load intake passage are opened into the combustion chamber, and a supercharger is installed in the high-load intake passage, thereby reducing combustibility during low-load operation. In addition, by providing a check valve in the low-load intake passage, the above-mentioned supercharging It is characterized by preventing intake air from blowing back into the low-load intake passage when the machine is operating.
以下、本発明を図面に示す実施例に基づいて詳細に説明
する。Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
第１図および第２図において、１はエンジン、２はシリ
ンダブロック、５はシリンダブロック２内に形成された
シリンダ、４は該シリンダ６内を往復動するピストン、
５はシリンダヘッド、６はシリンダヘッド５内に形成さ
れた燃焼室である。1 and 2, 1 is an engine, 2 is a cylinder block, 5 is a cylinder formed in the cylinder block 2, 4 is a piston that reciprocates within the cylinder 6,
5 is a cylinder head, and 6 is a combustion chamber formed within the cylinder head 5.
７および８は各々単一の吸気口９を介して燃焼室６に開
口する通路面積の小なる低負荷用吸気通路および通路面
積の大なる高負荷用吸気通路であって、該低負荷用およ
び高負荷用吸気通路７，８は単一の吸気管１０および上
記シリンダヘッド５に形成した単一の吸気ポート１１を
仕切壁１２によって２分割することにより形成されてい
る。上記低負荷用および高負荷用吸気通路７，８にはそ
れぞれ低負荷用および高負荷用絞弁１５，１４が配設さ
れており、低負荷運転時には低負荷用絞弁１５のみを開
作動して低負荷用吸気通路７のみによって吸気をエンジ
ン１の燃焼室６に供給することにより、吸気流速を速め
て燃焼室６でのスワール（渦流）の発生により燃焼性を
向上させる一方、高負荷運転時には高負荷用絞弁１４を
も開作動して両吸気通路７，８によって吸気をエンジン
１の燃焼室６に供給することにより、吸気の充填効率を
高めて出力性能を向上させるようにしたデュアル吸気シ
ステムが構成されている。Reference numerals 7 and 8 denote a low-load intake passage with a small passage area and a high-load intake passage with a large passage area, which open into the combustion chamber 6 through a single intake port 9, respectively. The high-load intake passages 7 and 8 are formed by dividing a single intake pipe 10 and a single intake port 11 formed in the cylinder head 5 into two by a partition wall 12. The low-load and high-load intake passages 7 and 8 are provided with low-load and high-load throttle valves 15 and 14, respectively, and only the low-load throttle valve 15 is opened during low-load operation. By supplying intake air to the combustion chamber 6 of the engine 1 only through the low-load intake passage 7, the intake air velocity is increased and swirl is generated in the combustion chamber 6, improving combustion performance. The dual engine is designed to sometimes open the high-load throttle valve 14 and supply intake air to the combustion chamber 6 of the engine 1 through both intake passages 7 and 8, thereby increasing intake air filling efficiency and improving output performance. The intake system is configured.
また、１５および１６はそれぞれ上記低負荷用および高
負荷用吸気通路７，８の各絞弁１５，１４下流に配設さ
れた低負荷用および高負荷用燃料噴射弁、１７゛は低負
荷用および高負荷用吸気通路７．８への吸入空気量を検
出するエアフローメータであって、該エアフローメータ
１７は上記低負荷用および高負荷用燃料噴射弁１５．１
６を制御する制御装置１８に接続されており、吸入空気
量に応じて各燃料噴射弁１８から噴射する燃料噴射量を
制御、するように構成されている。さらに、１９は燃焼
室６に排気口２０を介して開口する排気通路、２１は吸
気口９を開閉する吸気弁、２２は排気口２０を開閉する
排気弁である。Further, reference numerals 15 and 16 indicate low-load and high-load fuel injection valves disposed downstream of the throttle valves 15 and 14 of the low-load and high-load intake passages 7 and 8, respectively, and 17゛ indicates a low-load fuel injection valve. and an air flow meter for detecting the amount of intake air into the high load intake passage 7.8, and the air flow meter 17 is connected to the low load and high load fuel injection valves 15.1.
6, and is configured to control the amount of fuel injected from each fuel injection valve 18 according to the amount of intake air. Furthermore, 19 is an exhaust passage that opens into the combustion chamber 6 via the exhaust port 20, 21 is an intake valve that opens and closes the intake port 9, and 22 is an exhaust valve that opens and closes the exhaust port 20.
そして、２３は、排気通路１９に配設されて排気流によ
って駆動されるタービン２５ａと、該タービン２５＆に
連結軸２′５Ｃを介して連結されタービン２５ａと一体
に回転するプロア２５ｂ゛とからなる排気ターボ過給機
であって、上記プロア２５）は高負荷用吸気通路８の高
負荷用絞弁１４上流に配設されて、高負荷用吸気通路８
内の吸゛気を過給するように構成されている。さらに、
上記低負荷用吸気通路７の燃焼室６開ロ部（吸気口９）
近傍にはリード弁よりなる逆止弁２４が介設されている
。尚、第２図中、２５は点火栓である。23 consists of a turbine 25a disposed in the exhaust passage 19 and driven by the exhaust flow, and a proar 25b' connected to the turbine 25 & through a connecting shaft 2'5C and rotating integrally with the turbine 25a. In the exhaust turbo supercharger, the proar 25) is disposed upstream of the high-load throttle valve 14 of the high-load intake passage 8.
It is configured to supercharge the intake air inside the engine. moreover,
Opening part of the combustion chamber 6 of the above-mentioned low-load intake passage 7 (intake port 9)
A check valve 24 made of a reed valve is provided nearby. In addition, in FIG. 2, 25 is a spark plug.
したがって、上記実施例においては、エンジンの低負荷
運転時には、低負荷用絞弁１５のみが開作動して低負荷
用吸気通路７のみからエンジン１の燃焼室６に吸気が供
給される。その際、低負荷用吸気通路７あ蓬路面積が狭
いため、吸気が絞られてその流速を速め、燃焼室６内で
スワール（渦流）を生ぜしめることにより、燃焼の不安
定な低負荷運転時での燃焼性を向上させることができる
。Therefore, in the embodiment described above, during low-load operation of the engine, only the low-load throttle valve 15 is opened, and intake air is supplied to the combustion chamber 6 of the engine 1 only from the low-load intake passage 7. At that time, since the area of the low-load intake passage 7 is narrow, the intake air is throttled and its flow speed is increased, creating a swirl within the combustion chamber 6, resulting in unstable combustion during low-load operation. It is possible to improve the flammability at times.
特に、図示の如く、低負荷用吸気通路７を燃焼室６の外
周側に開口させれば、大きなスワールの発生により燃焼
性をより向上させることができるので好ましい。。In particular, it is preferable to open the low-load intake passage 7 toward the outer circumferential side of the combustion chamber 6 as shown in the figure, since combustion performance can be further improved by generating a large swirl. .
一方、エンジンの高負荷運転時には、低負荷用絞弁１５
と併せて高負荷用絞弁１４も開作動して、低負荷用およ
び高負荷用吸気通路７，８の両方からエンジン１の燃焼
室６に吸気が供給されることＫより、吸気の充填効率が
高められて良好な出力性能が確保される。しかも、高負
荷用吸気通路８には排気ターボ過給機２５のプロア２５
ｔｌが設けられていることにより、高負荷用吸気通路８
の吸気が過給されて、より一層吸気の充填効率が高めら
れることになり、高負荷運転時の出力性能を著しく向上
させることができる。尚、その際、ブロア２５ａにより
吸気過給されても、高負荷用吸気通路８０通路面積が広
いため、該高負荷用吸気通路８での吸気の流速はさほど
速くならず、燃焼騒音の増大を招くことはない。また、
その際、低負荷用吸気通路７に設けた逆止弁２４により
、高負荷用吸気通路８からの吸気過給により吸気が燃焼
室６を介して低負荷用吸気通路７へ吹返されるのを防止
することができる。On the other hand, during high-load operation of the engine, the low-load throttle valve 15
At the same time, the high-load throttle valve 14 is also opened, and intake air is supplied to the combustion chamber 6 of the engine 1 from both the low-load and high-load intake passages 7 and 8. is increased to ensure good output performance. Moreover, the proar 25 of the exhaust turbo supercharger 25 is located in the high-load intake passage 8.
By providing the tl, the high-load intake passage 8
Since the intake air is supercharged, the filling efficiency of the intake air is further increased, and the output performance during high-load operation can be significantly improved. In this case, even if the intake air is supercharged by the blower 25a, since the passage area of the high-load intake passage 80 is large, the flow velocity of the intake air in the high-load intake passage 8 will not be very high, which will cause an increase in combustion noise. I won't invite you. Also,
At this time, the check valve 24 provided in the low-load intake passage 7 prevents the intake air from being blown back into the low-load intake passage 7 via the combustion chamber 6 due to the intake air supercharging from the high-load intake passage 8. It can be prevented.
特に、本実施例の如き排気ターボ過給機２５を装備した
場合には通常、ブロア２！１ｂの存在により吸気抵抗が
増大して、特に加速時等の過渡運転時の初期に吸気の流
入の遅れが生じ、その結果運転性能が悪化するが、本発
明では高負荷用吸気通路８にブロア２５１）が介在する
のみで、低負荷用吸気通路７からはスムーズに吸気を流
入し得るので、上記の如き過渡運転時の運転性能の悪化
はなく、有効である。In particular, when equipped with an exhaust turbo supercharger 25 like the one in this embodiment, the presence of the blower 2!1b usually increases intake resistance, causing the inflow of intake air to become difficult, especially in the early stages of transient operation such as during acceleration. A delay occurs, resulting in deterioration of operating performance.However, in the present invention, only the blower 251) is interposed in the high-load intake passage 8, and intake air can smoothly flow in from the low-load intake passage 7. There is no deterioration in driving performance during transient operation such as, and it is effective.
尚、上記実施例では、高負荷用吸気通路８に排気ターボ
過給機２５を設けたが、その他−ペーン型−等の各種過
−給機を設けてもよいのは勿論である。In the above embodiment, the exhaust turbo supercharger 25 is provided in the high-load intake passage 8, but it goes without saying that various other superchargers such as a pane type supercharger may also be provided.
また、上記実施例では、低負荷用吸気通路７および高負
荷用吸気通路８を各々単一の吸気口９を介して燃焼室６
に開口させたが、各々独立して燃焼室６に開口させるよ
うにしてもよい。Further, in the above embodiment, the low-load intake passage 7 and the high-load intake passage 8 are connected to the combustion chamber 6 through a single intake port 9, respectively.
Although the combustion chamber 6 is opened to the combustion chamber 6, each of the combustion chambers 6 may be opened to the combustion chamber 6 independently.
以上の如く、本発明によれば、デュアル吸気システムに
おいて、高負荷−用吸気通路に過給機を装着する一方、
低負荷用吸気通路に逆止弁を設けたことにより、低負荷
運転時の燃焼性の向上を図りながら、燃焼騒音の増大化
や吸気の吹返しを生じることなく高負荷運転時の出力性
能を大幅に向上させることができるものである。As described above, according to the present invention, in the dual intake system, while the supercharger is installed in the high-load intake passage,
By installing a check valve in the low-load intake passage, it improves combustibility during low-load operation, while improving output performance during high-load operation without increasing combustion noise or blowing back air. This can be significantly improved.
図面は本発明の実施例を示し、第１図は全体概略構成図
、第２図は第１図の■−■線断面図である０
１・・エンジン、６・・燃焼室、７・・低負荷用吸気通
路、８・・高負荷用吸気通路、１９・・排気通路、２５
・・排気ターボ過給機、２５ａ・・タービン、２５ｂ・
・ブロア、２４・・逆止弁。The drawings show an embodiment of the present invention, and FIG. 1 is a general schematic diagram, and FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1. Intake passage for low load, 8...Intake passage for high load, 19...Exhaust passage, 25
・・Exhaust turbo supercharger, 25a・・Turbine, 25b・
・Blower, 24...Check valve.
Claims (1)
各々燃焼室に開口させ、該高負荷用吸気通路に過給機を
装着する一方、低負荷用吸気通路に逆止弁ｉ設けたこと
を特徴とするエンジンの吸気装置。(1) A low-load intake passage and a high-load intake passage are each opened into the combustion chamber, and a supercharger is installed in the high-load intake passage, while a check valve i is provided in the low-load intake passage. An engine intake system featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56109655A JPS5810113A (en) | 1981-07-13 | 1981-07-13 | Intake device for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56109655A JPS5810113A (en) | 1981-07-13 | 1981-07-13 | Intake device for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5810113A true JPS5810113A (en) | 1983-01-20 |
Family
ID=14515788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56109655A Pending JPS5810113A (en) | 1981-07-13 | 1981-07-13 | Intake device for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5810113A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0867610A2 (en) * | 1997-03-28 | 1998-09-30 | Hidaka Engineering Co., Ltd. | Air intake system for internal combustion engine |
-
1981
- 1981-07-13 JP JP56109655A patent/JPS5810113A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0867610A2 (en) * | 1997-03-28 | 1998-09-30 | Hidaka Engineering Co., Ltd. | Air intake system for internal combustion engine |
| EP0867610A3 (en) * | 1997-03-28 | 1999-05-26 | Hidaka Engineering Co., Ltd. | Air intake system for internal combustion engine |
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