JPS5934419A - Intake apparatus of two-cycle engine - Google Patents

Intake apparatus of two-cycle engine

Info

Publication number
JPS5934419A
JPS5934419A JP57145886A JP14588682A JPS5934419A JP S5934419 A JPS5934419 A JP S5934419A JP 57145886 A JP57145886 A JP 57145886A JP 14588682 A JP14588682 A JP 14588682A JP S5934419 A JPS5934419 A JP S5934419A
Authority
JP
Japan
Prior art keywords
volume
inlet pipe
output
pressure
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.)
Pending
Application number
JP57145886A
Other languages
Japanese (ja)
Inventor
Tatsuhiro Muramatsu
立比呂 村松
Keiichiro Ishii
啓一郎 石井
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.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP57145886A priority Critical patent/JPS5934419A/en
Publication of JPS5934419A publication Critical patent/JPS5934419A/en
Pending legal-status Critical Current

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
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/008—Resonance charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10308—Equalizing conduits, e.g. between intake ducts or between plenum chambers
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
    • 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)
  • Characterised By The Charging Evacuation (AREA)

Abstract

PURPOSE:To increase the output in an intermediate revolution range without suppressing the max. output by installing a box-shaped volume which closely envelops an inlet pipe on its outer periphery and drilling a small-diameter hole on the inlet pipe to allow the inside of the pipe and the inside of the volume to communicate each other. CONSTITUTION:When an intake valve is closed, the pressure in an inlet pipe 3 becomes higher than the pressure in a volume 8, so the mixed-gas supplied from a carburetor 2 flows into the sealed space 7 of the volume 8 from a small- diameter hole 9. During suction stroke, the pressure in the volume 8 becomes higher than the pressure in the inlet pipe 3, so that mixed-gas flows into the inlet pipe 3 from the volume 8 and is sucked into a crank chamber together with the mixed-gas supplied from the carburetor 2. Therefore, the intake ratio is improved, and especially the output in the intermediate revolution range in part- throttle state where the charging efficiency tends to decrease is effectively improved, an sharp reduction of torque can be suppress.

Description

【発明の詳細な説明】 本発明は２サイクルエンジンの吸入装置、さらに詳しく
はエンジンの中速回転域におけるトルクの谷をなりシ、
高速回転域での出力を増加させうる吸入装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake system for a two-stroke engine, and more specifically, to an intake system for a two-stroke engine,
The present invention relates to an inhalation device that can increase output in a high-speed rotation range.

従来２ストロークサイクルエンジンは、高回転域で出力
増加を図ると、第１図に示す如く中回転域でトルクの谷
が出やすくなる。しかして、トルクの落ち込みがひどい
ときには、出力の谷になる場合もある。In a conventional two-stroke cycle engine, when an attempt is made to increase output in a high rotation range, a valley in torque tends to appear in a medium rotation range as shown in FIG. However, when the drop in torque is severe, there may be a trough in the output.

即ち・スロットルバルブの高開度域では吸気流量が多く
、その流動慣性が大きいので、吸気弁の開閉後もその近
傍において吸気が圧縮されるに止まり・キャブレター側
では定常的に流動している。換言すれば吸気弁が閉止し
ても充填効率は低下せず、出力の低下もないが、スロッ
トルバルブの低開度域では、該バルブによって吸気流が
制限されているため、流動慣性が小さく、吸気弁の閉弁
中は吸気弁近傍の吸気通路では吸気流が停止し、開弁と
共に流動する間欠流の影響が強く、充填効率が低下し、
その結果出力の低下を生じることになる。That is, in the high opening range of the throttle valve, the intake flow rate is large and the flow inertia is large, so even after the intake valve opens and closes, the intake air is only compressed in the vicinity. - It flows steadily on the carburetor side. In other words, even if the intake valve closes, the filling efficiency does not decrease and the output does not decrease, but in the low opening range of the throttle valve, the intake flow is restricted by the valve, so the flow inertia is small. When the intake valve is closed, the intake flow stops in the intake passage near the intake valve, and the intermittent flow that flows when the intake valve opens has a strong influence, reducing filling efficiency.
As a result, a decrease in output will occur.

このため、公道上を走る車については、乗り易さを重視
した場合には最高出力を抑えてトルクの谷が出ないよう
にする必要があった。For this reason, when it comes to cars running on public roads, if ease of riding is a priority, it is necessary to suppress the maximum output to avoid torque troughs.

本発明は、かかる実情に鑑み、最高出力を抑制すること
なく・中回転域での出力を向上させうる２サイクルエン
ジンの吸入装置を提供することを目的とし、その要旨と
するところは、２サイクルエンジンのキャブレターとシ
リンダを連結するインレットパイプ外周に、所定の空間
部ヲ介して該インレットパイプを密閉被覆する箱型のボ
リュームを設け、上記インレットパイプに小径孔を穿設
して該バイブ内と上記ボリュームの密閉空間部とを連通
させたことにある。In view of the above circumstances, the present invention aims to provide an intake device for a two-stroke engine that can improve the output in the middle rotation range without suppressing the maximum output. A box-shaped volume is provided on the outer periphery of the inlet pipe that connects the engine's carburetor and the cylinder to seal the inlet pipe through a predetermined space. The reason lies in the fact that the volume is communicated with the closed space.

以下本発明の好適な実施例を図面により説明する。Preferred embodiments of the present invention will be described below with reference to the drawings.

第２図及び第３図は本発明の一実施例を示し、第２図中
１はエアクリーナー、２はキャブレター、３はインレッ
トパイプ、４はエンジンのシリンダーブロック、５はエ
キゾーストパイプ、６はクランクケースである。2 and 3 show an embodiment of the present invention, in which 1 is an air cleaner, 2 is a carburetor, 3 is an inlet pipe, 4 is an engine cylinder block, 5 is an exhaust pipe, and 6 is a crank. It is a case.

インレットパイプ３は、キャブレター２とシリンダーブ
ロック４内の図示しない吸気弁とを連結し、キャブレタ
ー２からの燃料混合空気をシリンダー内に送給する。The inlet pipe 3 connects the carburetor 2 and an intake valve (not shown) in the cylinder block 4, and feeds fuel-mixed air from the carburetor 2 into the cylinder.

しかして、インレットパイプ３の外周には、所定の空間
部７を介して該インレットパイプ３を密閉被覆する箱型
のボリューム８が取着されている。即ち、インレットパ
イプ３の外径寸法よりも大きい各辺を有する中空箱型の
ボリューム８内をインレットパイプ３が貫通するこトニ
より、ボリューム８の内面とインレットパイプ３の外周
面とで密閉空間７が形成される。A box-shaped volume 8 is attached to the outer periphery of the inlet pipe 3 through a predetermined space 7 to hermetically cover the inlet pipe 3. That is, since the inlet pipe 3 passes through the hollow box-shaped volume 8 having each side larger than the outer diameter of the inlet pipe 3, the inner surface of the volume 8 and the outer peripheral surface of the inlet pipe 3 form a sealed space 7. is formed.

インレットパイプ３には、小径の孔９が穿設されており
、インレットバイブ３内とボリューム８の」二記密閉空
間７とを連通している。A small diameter hole 9 is bored in the inlet pipe 3, and communicates the inside of the inlet vibe 3 with the sealed space 7 of the volume 8.

次に本実施例の作用につき説明する・ 第２図におけるインレットバイブ３内のａ点と、ボリュ
ーム８内のｂ点との圧力波形は、第４図のようになる。Next, the operation of this embodiment will be explained. The pressure waveforms at point a in the inlet vibe 3 and point b in the volume 8 in FIG. 2 are as shown in FIG.

図中右下りの斜線部分では、インレットバイブ３内（ａ
点）の圧力のほうがボリューム８内（ｂ点）の圧力より
高い。また、このとき吸気弁（リードバルブ）は閉じて
いるためキャブレター２かもの混合気の流れは、インレ
ットパイプ３の小径孔９からボリューム８の密閉空間７
内に流入することになる。In the diagonally shaded part on the lower right side of the figure, inside the inlet vibe 3 (a
The pressure at point ) is higher than the pressure inside volume 8 (point b). Also, since the intake valve (reed valve) is closed at this time, the air-fuel mixture from the carburetor 2 flows from the small diameter hole 9 of the inlet pipe 3 to the closed space 7 of the volume 8.
It will flow inside.

次に左下りの斜線部分（吸入行程）では、ボリューム８
内の圧力のほうがインレットバイブ３内の圧力よりも高
くなるので・ボリューム８からインレットバイブ３内に
上記混合気が流入する。このボリューム８から流入した
混合気は、キャブレター２から吸入された混合気ととも
にクランク室内に吸入される。このため、吸気比が向上
し、特に、充填効率が低下しがちなパートスロットル状
態における中回転域の出力に対して効果があり、従来の
ようなトルクの谷もなくなる。Next, in the diagonally shaded area on the left (intake stroke), the volume is 8.
Since the pressure inside is higher than the pressure inside the inlet vibe 3, the air-fuel mixture flows into the inlet vibe 3 from the volume 8. The mixture flowing from the volume 8 is sucked into the crank chamber together with the mixture sucked from the carburetor 2. Therefore, the intake ratio is improved, which is particularly effective for the output in the middle rotation range in the part-throttle state where charging efficiency tends to decrease, and there is no torque trough like in the past.

次に、第５図は本発明の第２実施例を示し、本実施例は
多気筒エンジンに本発明に係る吸入５− 装置を適用した場合を示しており、図中１はエアクリー
ナー、２は一対のキャブレター、３は一対のインレット
パイプ、４は一対のシリンダー、５は一対のエキゾース
トバイブである。Next, FIG. 5 shows a second embodiment of the present invention, and this embodiment shows a case where the intake device according to the present invention is applied to a multi-cylinder engine. are a pair of carburetors, 3 is a pair of inlet pipes, 4 is a pair of cylinders, and 5 is a pair of exhaust vibes.

しかして、ボリューム８は、一対のインレットバイブ３
外周と所定の空間部７を介して、各インレットパイプ３
を一対に密閉被覆する箱型に形成され、各インレットパ
イプ３には小径孔９．９が穿設されて上記密閉空間部７
と連通している。Therefore, volume 8 is a pair of inlet vibes 3
Each inlet pipe 3 via the outer periphery and a predetermined space 7
Each inlet pipe 3 is formed into a box shape that hermetically covers a pair of inlet pipes 3, and a small diameter hole 9.9 is bored in each inlet pipe 3 to close the closed space 7.
It communicates with

本実施例においては、ボリューム８を一体化することに
より、各インレットパイプ３当たりの密閉空間部７の容
積を実質上増大させることができ・吸入行程における吸
入空気量をより増大させることが可能になる。よって、
パートスロットル状態だゆでなく、スロットル全開状態
においても出力を増加させることができる。In this embodiment, by integrating the volume 8, it is possible to substantially increase the volume of the sealed space 7 for each inlet pipe 3, and it is possible to further increase the amount of intake air in the intake stroke. Become. Therefore,
The output can be increased not only in a part-throttle state but also in a fully-open throttle state.

また、ボリューム８を一体化させることにより、設置ス
ペースをより節約することができ、エンジン回りの狭い
スペースにコンパクトニ配＝６− １ａすることが可能で、現実の設計面で有利となる０ 第６図は本発明に係る吸入装置を装備した場合と未装備
の場合のエンジンの出力を比較したものであり、実線で
示す未装備エンジンに比較して、破線で示す吸入装置付
きのエンジンは、スロットルバルブの２５％開度・即ち
バートスロットル状態においては特に中回転域での出力
が向上し、トルクの山が減少しているのがわかる〇また
、上記第２実施例の如く多気筒エンジンに適用した場合
は、スロットル全開状態でも高回転域での出力向上が図
れることがわかる。In addition, by integrating the volume 8, the installation space can be further saved, and compact installation = 6-1a can be installed in the narrow space around the engine, which is advantageous in terms of actual design. Figure 6 compares the engine output when equipped with and without the intake device according to the present invention.Compared to the unequipped engine shown by the solid line, the engine with the intake device shown by the broken line has a It can be seen that when the throttle valve is opened at 25%, that is, in a bad throttle state, the output is improved especially in the middle rotation range, and the peak of torque is reduced. Also, as in the second example above, when the multi-cylinder engine It can be seen that when applied, the output can be improved in the high rotation range even with the throttle fully open.

なお・ボリューム８の形状や・インレットパイプ３の小
径孔の大きさ、穿設個数などは・設計条件に応じて種々
変更が可能であることは論をまたない。It goes without saying that the shape of the volume 8, the size of the small-diameter holes of the inlet pipe 3, the number of holes, etc., can be changed in accordance with the design conditions.

」二連した如く構成された本発明にあっては、インレッ
トパイプに箱型ボリュームを設けるだけで、最高出力を
落とさずに中回転域での出力を向上させ・トルクの谷の
発生を未然に防ぐことができ、多気筒エンジンに適用１
−だ場合は、スロットル全開状態でも高回転域での出力
向上を図ることができる。''In the present invention, which is configured as a double series, by simply providing a box-shaped volume in the inlet pipe, the output in the middle rotation range can be improved without reducing the maximum output, and the occurrence of torque valleys can be prevented. Can be prevented and applied to multi-cylinder engines1
-, it is possible to improve the output in the high rotation range even with the throttle fully open.

マタ、箱型ボリュームは、インレットパイプの外周に所
定の空間部を介して設けたものであり、インレットパイ
プから大きく突出させて取り付ける必要がなく、非常に
狭いスペースでも設置可能であるからスペースの節約に
なり、従来のエンジン回りのレイアウトを大きく変更す
ることなく装備することができるものである。The box-shaped volume is installed on the outer periphery of the inlet pipe through a predetermined space, so it does not need to be installed in a large protrusion from the inlet pipe, and it can be installed even in a very narrow space, saving space. This allows it to be installed without major changes to the conventional engine layout.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の２サイクルエンジンにおける回転数と馬
力及びトルクとの関係を示す線図、第２図及び第３図は
本発明の第１実施例を示し、第２図は本発明に係る吸入
装飯七装備したエンジン全体の一部破断側面図、第３図
はボリュームの設置態様を示す概念図、第４図は本発明
におけるクランク角度と圧力との関係を示す説明図、第
５図は本発明の第２実施例を示す概念図、第６図は本発
明を適用した場合の出力向上度合を示す線図である。 ２・・・・・・キャブレター、　　３・・・・・・イン
レットパイプ、７・・・・・・’／ｌ？閉空間部、　　
　８・・・・・・ボリューム、９・・・・・小径孔。 ９− 第１図 １Ｎ開昭５９−３４４１９　（４） 第３図。 ゛［Ｌ射口 エノンノ凹私妖Ｖｒｍ１FIG. 1 is a diagram showing the relationship between rotation speed, horsepower, and torque in a conventional two-stroke engine, FIGS. 2 and 3 show a first embodiment of the present invention, and FIG. FIG. 3 is a conceptual diagram showing how the volume is installed; FIG. 4 is an explanatory diagram showing the relationship between crank angle and pressure in the present invention; FIG. 6 is a conceptual diagram showing the second embodiment of the present invention, and FIG. 6 is a diagram showing the degree of output improvement when the present invention is applied. 2...Carburetor, 3...Inlet pipe, 7...'/l? closed space,
8...Volume, 9...Small diameter hole. 9- Fig. 1 1N Kaisho 59-34419 (4) Fig. 3.゛ [L ejection mouth Enon no concave private monster Vrm1

Claims (2)

【特許請求の範囲】[Claims] （１）２サイクルエンジンのキャブレターとシリンダを
連結スるインレットパイプ外周に、所定の空間部を介し
て該インレットパイプを密閉被覆する箱型のボリューム
を設け、上記インレットパイプに小径孔を穿設して該バ
イブ内と上記ボリュームの密閉空間部とを連通させたこ
とを特徴とする２サイクルエンジンの吸入装置。(1) A box-shaped volume is provided on the outer periphery of the inlet pipe that connects the carburetor and cylinder of a two-stroke engine to seal the inlet pipe through a predetermined space, and a small diameter hole is bored in the inlet pipe. An inhalation device for a two-stroke engine, characterized in that the inside of the vibrator is communicated with a sealed space portion of the volume. （２）　　上記ボリュームは・複数本の上記インレット
パイプを一体に密閉被覆してなる特許請求の範囲第１項
記載の２サイクルエンジンの吸入装置。 １−(2) The intake device for a two-stroke engine according to claim 1, wherein the volume is formed by integrally sealingly covering a plurality of the inlet pipes. 1-
JP57145886A 1982-08-23 1982-08-23 Intake apparatus of two-cycle engine Pending JPS5934419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57145886A JPS5934419A (en) 1982-08-23 1982-08-23 Intake apparatus of two-cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57145886A JPS5934419A (en) 1982-08-23 1982-08-23 Intake apparatus of two-cycle engine

Publications (1)

Publication Number Publication Date
JPS5934419A true JPS5934419A (en) 1984-02-24

Family

ID=15395320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57145886A Pending JPS5934419A (en) 1982-08-23 1982-08-23 Intake apparatus of two-cycle engine

Country Status (1)

Country Link
JP (1) JPS5934419A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7556123B2 (en) * 2006-06-30 2009-07-07 Toyoda Gosei Co., Ltd. Muffler duct

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7556123B2 (en) * 2006-06-30 2009-07-07 Toyoda Gosei Co., Ltd. Muffler duct

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