JPS6323544Y2 - - Google Patents
Info
- Publication number
- JPS6323544Y2 JPS6323544Y2 JP1984184315U JP18431584U JPS6323544Y2 JP S6323544 Y2 JPS6323544 Y2 JP S6323544Y2 JP 1984184315 U JP1984184315 U JP 1984184315U JP 18431584 U JP18431584 U JP 18431584U JP S6323544 Y2 JPS6323544 Y2 JP S6323544Y2
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- check valve
- valve
- engine
- intake
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 description 19
- 239000000203 mixture Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004202 respiratory function Effects 0.000 description 1
Landscapes
- Characterised By The Charging Evacuation (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Description
【考案の詳細な説明】
本考案は主として自動車その他の車両用の4サ
イクルの内燃エンジンに関する。本願出願人は先
にこの種エンジンとして、エンジンのシリンダ内
に吸気弁を介して連なる吸気通路内にスロツトル
弁とその下流側の給気の流入は許容するが逆流は
阻止する逆止弁とを備え、かくて該エンジンの特
に低速域の出力特性を向上するべくした式のもの
を提案した。(特公昭47−50884号参照)
本考案はこの型式のエンジンの改良に関するも
ので、4サイクルエンジンのシリンダ2内に吸気
弁3を介して連なる吸気通路4を設け、該吸気通
路4内に、スロツトル弁6と該スロツトル弁6の
下流側に位置して吸気の流入は許容するが逆流は
阻止する逆止弁7とを備える内燃エンジンにおい
て、前記吸気通路4に、前記逆止弁7に近接して
該逆止弁7の上流に開口するチヤンバ10を備え
ることを特徴とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates primarily to four-stroke internal combustion engines for automobiles and other vehicles. The applicant of this application previously developed an engine of this type with a throttle valve and a check valve downstream of the throttle valve, which allows intake air to flow in but prevents reverse flow, in the intake passage that is connected to the cylinder of the engine via the intake valve. Thus, we have proposed a formula that is intended to improve the output characteristics of the engine, particularly in the low speed range. (Refer to Japanese Patent Publication No. 47-50884.) The present invention relates to an improvement of this type of engine, and includes an intake passage 4 that is connected to the cylinder 2 of a four-cycle engine through an intake valve 3, and that includes: In an internal combustion engine that includes a throttle valve 6 and a check valve 7 located downstream of the throttle valve 6 to allow inflow of intake air but prevent reverse flow, the intake passage 4 is provided in the vicinity of the check valve 7. It is characterized by comprising a chamber 10 that opens upstream of the check valve 7.
本考案の実施例を別紙図面に付説明する。 Embodiments of the present invention will be explained with reference to attached drawings.
図面で1はエンジン、2はそのシリンダを示
し、該シリンダ2内に吸気弁3を介して連なる吸
気通路4内に、気化器5内のスロツトル弁6とそ
の下流側の吸気の流入は許容するが逆流は阻止す
る逆止弁7とを備える。該逆止弁7は例えばリー
ド弁から成るもので弁本体7aにリード7bを備
える型式とし、その背側に押えスペーサ8を備え
る。図面で9は該吸気通路4の上側端のエアクリ
ーナを示す。 In the drawings, 1 is an engine, and 2 is a cylinder thereof.A throttle valve 6 in a carburetor 5 and intake air downstream of the throttle valve 6 in a carburetor 5 are allowed to flow into an intake passage 4 that is connected to the cylinder 2 via an intake valve 3. However, it is equipped with a check valve 7 that prevents backflow. The check valve 7 is made of a reed valve, for example, and has a lead 7b on the valve body 7a, and a presser spacer 8 on the back side thereof. In the drawings, reference numeral 9 indicates an air cleaner at the upper end of the intake passage 4.
以上は先に提案したものと特に異なることな
く、該逆止弁7は該エンジン1の特に低速域の出
力特性を向上すべく作用するが本考案によれば、
かかるものにおいて該吸気通路4に該スロツトル
弁6と逆止弁7の中間部で該通路4内に挿通する
チヤンバ10を備える。図示のものでは前記した
スペーサ8に側方にのびるパイプ8aを設け、予
め別個に用意されるチヤンバ10をその開口端で
これに嵌合して該通路4内に挿通させるようにし
た。該チヤンバ10は例えば鉄その他の金属製と
し或いはゴムその他の弾性体製とする等任意であ
り、その容積は例えば該エンジン1が50c.c.の単気
筒の場合、200c.c.程度とする。その作動を説明す
るに、例えば第2図乃至第4図示の通りであり、
該チヤンバ10は呼吸作用を営む。即ちエンジン
1の吸入工程では第2図示のように逆止弁7が開
いて混合気はこれを介してシリンダ22内に導か
れると共にこの際その上流側には吸入負圧を生じ
該チヤンバ10内も負圧となる。次で吸入工程の
終了間近に伴い該弁7が閉じた場合を考えるに該
チヤンバ10内には吸入負圧が多少とも残存し、
この負圧は第3図示のように気化器5から混合気
を吸引し、該チヤンバ10内には該混合気が充填
される。次の吸入工程に至れば第4図示のように
このチヤンバ10内の混合気は気化器5からの混
合気と共にシリンダ2内に導かれるもので、かく
て該エンジン1は特にこのチヤンバ10からの供
給によりその吸入効率が増大して出力特性が向上
される。尚、この場合4サイクルエンジンのた
め、第3図示の吸入工程の終了時においては、吸
気弁3と逆止弁7との閉じによつて両弁間の室a
とチヤンバ10内の室bと逆止弁7及びスロツト
ル弁6間の室cとは共に負圧状態にあるが、チヤ
ンバ10内の室bは閉塞されていてかつ第2図示
の如く混合気を流出しているため、その負圧の度
合は極めて著しく又逆止弁7及びスロツトル弁6
間の室cは慣性で流入してきた混合気のため大気
圧に近くなり、従つてその際通常では吸気弁3及
び逆止弁7間の室aと逆止弁7及びスロツトル弁
6間の室cとに負圧の差が生じ逆止弁7にバタツ
キを生じてしまうが、本案ではその逆止弁7の上
流近傍に負圧の度合の高いチヤンバ10内の室b
が開口しているため有効的に上記バタツキを防止
でき、又このチヤンバ10からの混合気は吸気通
路4内に渦流を生じ混合気を撹拌してその霧化を
良好にする。更にこのチヤンバ10は該エンジン
1の吸入に要するポンピング出力を低減すべく作
用し、燃費を向上すべく有効である。即ち該チヤ
ンバ10は前記したように多少とも残存する吸入
負圧により予めこれに混合気を吸入し、次でこの
混合気は吸入工程において気化器5からの混合気
と共にシリンダ2に導かれるもので、該エンジン
1の吸入工程における吸入に要するポンピング馬
力を減少すべく作用する。 The above is not particularly different from what was proposed earlier, and the check valve 7 acts to improve the output characteristics of the engine 1, especially in the low speed range, but according to the present invention,
In this device, the intake passage 4 is provided with a chamber 10 inserted into the passage 4 at an intermediate portion between the throttle valve 6 and the check valve 7. In the illustrated spacer 8, a pipe 8a extending laterally is provided, and a chamber 10 prepared separately in advance is fitted at the open end of the chamber 10 to be inserted into the passage 4. The chamber 10 may be made of iron or other metal, rubber or other elastic material, etc., and its volume is, for example, about 200 c.c. when the engine 1 is a 50 c.c. single cylinder. . To explain its operation, for example, it is as shown in FIGS. 2 to 4,
The chamber 10 performs a respiratory function. That is, during the intake process of the engine 1, the check valve 7 opens as shown in the second figure, and the air-fuel mixture is guided into the cylinder 22 through it, and at this time, a negative suction pressure is generated on the upstream side of the check valve 7, which causes a negative pressure in the chamber 10. Also becomes negative pressure. Next, considering the case where the valve 7 closes near the end of the suction process, some negative suction pressure remains in the chamber 10,
This negative pressure sucks the air-fuel mixture from the carburetor 5 as shown in the third figure, and the chamber 10 is filled with the air-fuel mixture. When the next intake stroke is reached, the air-fuel mixture in this chamber 10 is led into the cylinder 2 together with the air-fuel mixture from the carburetor 5, as shown in FIG. The supply increases its suction efficiency and improves its output characteristics. In this case, since the engine is a 4-cycle engine, at the end of the intake stroke shown in the third figure, the intake valve 3 and the check valve 7 are closed, so that the chamber a between the two valves is closed.
Both the chamber b in the chamber 10 and the chamber c between the check valve 7 and the throttle valve 6 are in a negative pressure state, but the chamber b in the chamber 10 is closed and the air-fuel mixture is not allowed to flow as shown in the second figure. Because of the outflow, the degree of negative pressure is extremely significant, and the check valve 7 and throttle valve 6
The air-fuel mixture in between flows into the chamber c due to inertia, so the pressure is close to atmospheric pressure. A negative pressure difference occurs between the check valve 7 and the check valve 7, but in this case, the check valve 7 has a chamber b in the chamber 10 with a high degree of negative pressure near the upstream side of the check valve 7.
Since the chamber 10 is open, the above-mentioned fluttering can be effectively prevented, and the air-fuel mixture from the chamber 10 generates a vortex in the intake passage 4 to agitate the air-fuel mixture and improve its atomization. Further, this chamber 10 acts to reduce the pumping output required for intake by the engine 1, and is effective in improving fuel efficiency. That is, as described above, the chamber 10 sucks the air-fuel mixture into it in advance due to some residual suction negative pressure, and then this air-fuel mixture is guided to the cylinder 2 together with the air-fuel mixture from the carburetor 5 in the intake process. , acts to reduce the pumping horsepower required for suction in the suction stroke of the engine 1.
尚、本考案の実験によれば、本考案エンジンは
例えば第5図及び第6図示のように出力特性にお
いて優れ、更に第7図示のように燃費において優
れることが確認された。即ち第5図及び第6図は
スロツトル弁6の半開及び全開の場合の出力特性
線図であり、図中Aは従来の通常型式のエンジン
の出力特性、Bは先に提案した逆止弁付エンジン
の出力特性、Cは本考案の出力特性である。更に
第7図は燃費の特性線図であり、図中Aは通常型
式のエンジンの場合、Bは逆止弁付エンジンの場
合、Cは本考案の場合を夫々示す。 In addition, according to the experiments of the present invention, it was confirmed that the engine of the present invention is excellent in output characteristics as shown in FIGS. 5 and 6, and is also excellent in fuel efficiency as shown in FIG. 7. That is, Figures 5 and 6 are output characteristic diagrams when the throttle valve 6 is half open and fully open, where A is the output characteristic of the conventional conventional engine and B is the output characteristic of the previously proposed engine with a check valve. The output characteristic of the engine, C, is the output characteristic of the present invention. Furthermore, FIG. 7 is a fuel efficiency characteristic diagram, in which A shows the case of a normal type engine, B shows the case of the engine with a check valve, and C shows the case of the present invention.
このように本考案によるときは、スロツトル弁
6と逆止弁7とを前後して設けた4サイクルエン
ジンの吸気通路4には、その逆止弁7に近接して
開口するチヤンバ10を備えたものであるからチ
ヤンバ10内の混合気は呼吸作用を営んで4サイ
クルエンジンの吸入効率を増大させて出力特性を
向上すると共に吸入馬力が減少されて燃費を向上
させることができ而もチヤンバ10は逆止弁7に
近接してその上流に開口するためチヤンバ10の
呼吸作用の吐出時は吸気通路内に過流を生じて混
合気の撹拌を良好にすると共にその呼吸作用の吸
込時は、その吸入負圧が逆止弁7の裏面に引張力
として働いて吸気弁3及び逆止弁7間の室aと逆
止弁7及び絞り弁5間の室cとの差圧が大きい4
サイクルエンジンにも拘らず該逆止弁の閉じを確
実にしてその閉弁時の弁のバタツキを防止できる
等の効果を有する。 As described above, according to the present invention, the intake passage 4 of a four-cycle engine in which the throttle valve 6 and the check valve 7 are provided in front and behind each other is provided with a chamber 10 that opens close to the check valve 7. Therefore, the air-fuel mixture in the chamber 10 has a breathing effect, increasing the suction efficiency of the 4-cycle engine and improving the output characteristics, as well as reducing the suction horsepower and improving fuel efficiency. Since it opens close to and upstream of the check valve 7, when the breathing action of the chamber 10 is discharged, an excess flow is generated in the intake passage to improve the agitation of the air-fuel mixture, and when the breathing action is inhaled, the The suction negative pressure acts as a tensile force on the back surface of the check valve 7, and the pressure difference between the chamber a between the intake valve 3 and the check valve 7 and the chamber c between the check valve 7 and the throttle valve 5 is large.
Even though the engine is a cycle engine, it has the effect of ensuring that the check valve is closed and preventing the valve from fluttering when the valve is closed.
第1図は本考案装置の1例の截断側面図、第2
図は乃至第4図はその作動原理の説明線図、第5
図及び第6図は出力特性線図、第7図は燃費特性
線図である。
1……エンジン、2……シリンダ、3……吸気
弁、4……吸気通路、6……スロツトル弁、7…
…逆止弁、10……チヤンバ。
Fig. 1 is a cutaway side view of one example of the device of the present invention;
Figures 4 through 4 are explanatory diagrams of the operating principle, and Figure 5.
6 and 6 are output characteristic diagrams, and FIG. 7 is a fuel efficiency characteristic diagram. 1...Engine, 2...Cylinder, 3...Intake valve, 4...Intake passage, 6...Throttle valve, 7...
...Check valve, 10... Chamber.
Claims (1)
を介して連なる吸気通路4を設け、該吸気通路4
内に、スロツトル弁6と該スロツトル弁6の下流
側に位置して吸気の流入は許容するが逆流は阻止
する逆止弁7とを備える内燃エンジンにおいて、
前記吸気通路4に、前記逆止弁7に近接して該逆
止弁7の上流に開口するチヤンバ10を備えるこ
とを特徴とする内燃エンジン。 Intake valve 3 in cylinder 2 of a 4-stroke engine
An intake passage 4 is provided which is continuous through the intake passage 4.
An internal combustion engine comprising a throttle valve 6 and a check valve 7 located downstream of the throttle valve 6 to allow intake air to flow in but prevent reverse flow.
An internal combustion engine characterized in that the intake passage 4 is provided with a chamber 10 that is close to the check valve 7 and opens upstream of the check valve 7.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18431584U JPS60112632U (en) | 1984-12-06 | 1984-12-06 | internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18431584U JPS60112632U (en) | 1984-12-06 | 1984-12-06 | internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60112632U JPS60112632U (en) | 1985-07-30 |
JPS6323544Y2 true JPS6323544Y2 (en) | 1988-06-28 |
Family
ID=30741800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18431584U Granted JPS60112632U (en) | 1984-12-06 | 1984-12-06 | internal combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60112632U (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS566014A (en) * | 1979-06-27 | 1981-01-22 | Yamaha Motor Co Ltd | Intake system for engine |
-
1984
- 1984-12-06 JP JP18431584U patent/JPS60112632U/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS566014A (en) * | 1979-06-27 | 1981-01-22 | Yamaha Motor Co Ltd | Intake system for engine |
Also Published As
Publication number | Publication date |
---|---|
JPS60112632U (en) | 1985-07-30 |
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