JP3232869B2 - Intake duct device for internal combustion engine - Google Patents
Intake duct device for internal combustion engineInfo
- Publication number
- JP3232869B2 JP3232869B2 JP09354094A JP9354094A JP3232869B2 JP 3232869 B2 JP3232869 B2 JP 3232869B2 JP 09354094 A JP09354094 A JP 09354094A JP 9354094 A JP9354094 A JP 9354094A JP 3232869 B2 JP3232869 B2 JP 3232869B2
- Authority
- JP
- Japan
- Prior art keywords
- intake
- blow
- hole
- ventilation
- resonance chamber
- 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 - Fee Related
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 16
- 238000009423 ventilation Methods 0.000 claims description 74
- 238000005192 partition Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 description 35
- 238000011109 contamination Methods 0.000 description 11
- 230000005484 gravity Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
Classifications
-
- 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
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
-
- 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
- F02M35/10255—Arrangements of valves; Multi-way valves
-
- 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
- F02M35/10288—Air intakes combined with another engine part, e.g. cylinder head cover or being cast in one piece with the exhaust manifold, cylinder head or engine block
-
- 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
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は吸気騒音を低減するレゾ
ネータをもった内燃機関の吸気ダクト装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake duct device for an internal combustion engine having a resonator for reducing intake noise.
【０００２】[0002]
【従来の技術】内燃機関の吸気脈動に伴う吸気音、吸排
気弁の開閉に伴う着座音など吸気系の騒音を低減するた
めに、吸気通路の一部にヘルムホルツ型レゾネータを設
けることは、たとえば実開昭６２−１３７３７８号公報
や実開平３−４３５７６号公報等を初めとして数多く提
案されている。2. Description of the Related Art Providing a Helmholtz type resonator in a part of an intake passage in order to reduce intake noise caused by intake pulsation of an internal combustion engine and seating noise caused by opening / closing of an intake / exhaust valve has been proposed. Many proposals have been made, such as Japanese Utility Model Laid-Open No. 62-137378 and Japanese Utility Model Laid-Open No. 3-43576.
【０００３】これらは、吸気通路に対して共鳴通路を介
して連通する箱型空間、つまり共鳴室を設け、共鳴通路
の断面積、共鳴室の容積等を、消音目標とする吸気騒音
の周波数領域との関係から設定し、レゾネータの共鳴効
果により吸気騒音を減衰、低減するものである。These are provided with a box-shaped space communicating with the intake passage via a resonance passage, that is, a resonance chamber, and the cross-sectional area of the resonance passage, the volume of the resonance chamber, and the like are determined by the frequency range of the intake noise to be silenced. And the intake noise is attenuated and reduced by the resonance effect of the resonator.
【０００４】ところで、内燃機関のブローバイガスを吸
気系に還流するために、吸気系の上流からブローバイ換
気空気通路を分岐し、またブローバイガスをスロットル
弁下流に導入する通路を設け、ピストンとシリンダとの
摺動間隙からクランク室に吹き抜けたブローバイガスを
吸気系に還流し、再度燃焼させるようにしている。In order to return the blow-by gas of the internal combustion engine to the intake system, a blow-by ventilation air passage is branched from the upstream of the intake system, and a passage for introducing the blow-by gas downstream of the throttle valve is provided. The blow-by gas blown into the crank chamber from the sliding gap is returned to the intake system and burned again.
【０００５】この場合、ブローバイ換気空気の取出口
は、アイドル回転等を制御するために、スロットル弁を
バイパスして供給する補助空気通路の取出口よりも下流
側に設け、機関の高負荷、高回転運転時など、ブローバ
イ換気空気通路を一部のブローバイガスが逆流しても、
オイルミストが補助空気通路に流入しないようにして、
補助空気バルブにオイルが付着するのを防ぎ、制御の安
定性を確保している。[0005] In this case, the outlet of the blow-by ventilation air is provided downstream of the outlet of the auxiliary air passage which is supplied by bypassing the throttle valve in order to control idle rotation and the like, so that the engine has a high load and a high load. Even if some blow-by gas flows backward in the blow-by ventilation air passage during rotation operation, etc.
Prevent oil mist from flowing into the auxiliary air passage,
Prevents oil from adhering to the auxiliary air valve, ensuring control stability.
【０００６】[0006]
【発明が解決しようとする課題】ところが、吸気通路に
対してこれらレゾネータやブローバイ換気通路、補助空
気通路とを連通させる場合、スペース的な制約から、そ
れぞれ互いの機能的な干渉を回避をする位置に接続する
ことが困難なことがある。However, when these resonators, blow-by ventilation passages, and auxiliary air passages are connected to the intake passage, due to space restrictions, positions where functional interference with each other is avoided. It can be difficult to connect to
【０００７】これらスペースの節減や配管構成の簡略化
から、吸気通路に連通するレゾネータの共鳴室に対して
ブローバイ換気通路を直接的に接続し、レゾネータを経
由してブローバイ換気空気を取り出すことが考えられる
が、この場合、機関高負荷、高回転時などブローバイ換
気通路をブローバイガスが逆流し、共鳴室内にブローバ
イガスが滞留すると、ブローバイガス中のオイルミスト
が分離し、共鳴室に溜まり、共鳴室がオイルにより汚損
されるという問題を生じる。In order to save space and simplify the piping configuration, it is conceivable to connect the blow-by ventilation passage directly to the resonance chamber of the resonator communicating with the intake passage and take out the blow-by ventilation air via the resonator. However, in this case, when the blow-by gas flows backward in the blow-by ventilation passage such as when the engine is at a high load or at a high speed, and the blow-by gas stays in the resonance chamber, oil mist in the blow-by gas is separated and accumulated in the resonance chamber, and the Causes a problem that oil is contaminated by oil.
【０００８】さらにレゾネータの共鳴室に前記した補助
空気通路の取出口を接続したときにも、逆流したブロー
バイガス中のオイルミストが補助空気通路に流入し、補
助空気バルブのオイルミストによる汚損の問題が起きて
しまう。Further, even when the outlet of the auxiliary air passage is connected to the resonance chamber of the resonator, the oil mist in the blow-by gas flowing backward flows into the auxiliary air passage, and the oil mist of the auxiliary air valve causes contamination. Will happen.
【０００９】本発明はこのような問題を解決するもの
で、ブローバイガス中のオイルミストによる共鳴室の汚
損を防止し、また補助空気通路の同じく汚損を防止する
ことを目的とする。It is an object of the present invention to solve such a problem and to prevent the resonance chamber from being stained by oil mist in the blow-by gas, and also to prevent the auxiliary air passage from being soiled.
【００１０】[0010]
【課題を解決するための手段】そこで第１の発明は、吸
気ダクトに通孔を介して連通する共鳴室を備えた内燃機
関の吸気ダクト装置において、前記通孔を水平よりも上
方に向けて共鳴室に開口させ、かつこの共鳴室にブロー
バイ換気通路の取入口を接続し、かつこの取入口を前記
通孔よりも上方に開口させる。Means for Solving the Problems] Accordingly a first aspect of the present invention, intake
In an intake duct device for an internal combustion engine provided with a resonance chamber communicating with an air duct through a through hole, the through hole is opened upward from the horizontal to the resonance chamber, and a blow-by ventilation passage is provided in the resonance chamber. An inlet is connected and the inlet is opened above the through hole.
【００１１】第２の発明は、第１の発明において、前記
ブローバイ換気取入口が、前記通孔の指向する方向の近
傍の共鳴室壁面に開口している。In a second aspect based on the first aspect, the blow-by ventilation inlet is opened in a wall surface of the resonance chamber near a direction in which the through hole is directed.
【００１２】第３の発明は、第１の発明において、前記
ブローバイ換気取入口と通孔とは、吸気通路の軸心に関
して水平方向の同一サイドに位置させる。In a third aspect based on the first aspect, the blow-by ventilation inlet and the through hole are located on the same side in the horizontal direction with respect to the axis of the intake passage.
【００１３】第４の発明は、第１の発明において、前記
共鳴室に吸気スロットル弁を迂回する補助空気通路の取
入口を接続し、この補助空気取入口を前記ブローバイ換
気取入口よりも上方に開口させる。In a fourth aspect based on the first aspect, an intake of an auxiliary air passage bypassing the intake throttle valve is connected to the resonance chamber, and the auxiliary air intake is located above the blow-by ventilation intake. Open.
【００１４】第５の発明は、第４の発明において、前記
ブローバイ換気通路の取入口と通孔とを結ぶ距離より
も、補助空気通孔の取入口と通孔とを結ぶ距離が長くな
る位置に補助空気通路の取入口を開口させる。In a fifth aspect based on the fourth aspect, the distance between the inlet of the auxiliary air hole and the through hole is longer than the distance between the inlet of the blow-by ventilation passage and the through hole. Open the intake of the auxiliary air passage.
【００１５】第６の発明は、第４の発明において、前記
ブローバイ換気通路の取入口と補助空気通路の取入口と
を、吸気通路の軸心に関して水平方向の互いに異なった
サイドに位置させる。In a sixth aspect based on the fourth aspect, the intake of the blow-by ventilation passage and the intake of the auxiliary air passage are located on different sides in the horizontal direction with respect to the axis of the intake passage.
【００１６】第７の発明は、吸気ダクトに通孔を介して
連通する共鳴室を備えた内燃機関の吸気ダクト装置にお
いて、前記共鳴室の内部を隔壁を介して２つの共鳴室に
仕切り、一方の共鳴室にブローバイ換気通路の取入口、
他方の共鳴室には吸気スロットル弁を迂回する補助空気
通路の取入口を開口させ、かつ各共鳴室に対して吸気ダ
クトの通孔をそれぞれ連通し、ブローバイ換気取入口が
開口する共鳴室の通孔をこのブローバイ換気取入口より
も下方に配置する。According to a seventh aspect of the present invention, an intake duct is provided through a through hole.
In an intake duct device for an internal combustion engine provided with a communicating resonance chamber, the interior of the resonance chamber is partitioned into two resonance chambers via a partition, and one of the resonance chambers has an intake of a blow-by ventilation passage;
In the other resonance chamber, an intake of an auxiliary air passage that bypasses the intake throttle valve is opened, and a through hole of the intake duct is connected to each resonance chamber. The holes are located below this blow-by ventilation intake.
【００１７】第８の発明は、第７の発明において、前記
補助空気取入口をブローバイ換気取入口よりも高い位置
に配置する一方、ブローバイ換気取入口が開口する共鳴
室の通孔をブローバイ換気取入口に指向させ、かつブロ
ーバイ換気取入口が開口する共鳴室の通孔よりも、他方
の補助空気取入口が開口する共鳴室の通孔を高い位置に
設ける。In an eighth aspect based on the seventh aspect, the auxiliary air intake is disposed at a position higher than the blow-by ventilation intake, and the through-hole of the resonance chamber where the blow-by ventilation intake is opened is provided in the blow-by ventilation intake. The through-hole of the resonance chamber, which is directed to the inlet and whose other auxiliary air intake opens, is provided higher than the through-hole of the resonance chamber, which opens the blow-by ventilation intake.
【００１８】[0018]
【作用】第１の発明では、機関の高速、高負荷時などブ
ローバイ換気通路から一部のブローバイガスが共鳴室に
逆流すると、共鳴室での流路断面積の拡大により流速が
低下し、オイルミストが重力により落下していくが、ブ
ローバイ換気取入口よりも下方で、しかも上方に向けて
吸気ダクトの通孔が開口し、かつ機関高速高負荷時など
吸気ダクト内には強い負圧が発生しているため、逆流し
たブローバイガスは通孔を介して吸気ダクトにそのまま
吸入されていき、共鳴室におけるオイルミストの滞留を
防ぐことができる。According to the first aspect of the invention, when a part of the blow-by gas flows back into the resonance chamber from the blow-by ventilation passage when the engine is running at a high speed or a high load, the flow velocity decreases due to an increase in the cross-sectional area of the flow passage in the resonance chamber. The mist falls due to gravity, but the intake duct opening is open below and further upward than the blow-by ventilation intake, and strong negative pressure is generated in the intake duct such as when the engine is at high speed and high load. As a result, the blow-by gas that has flowed backward is sucked into the intake duct as it is through the through-hole, and the stagnation of oil mist in the resonance chamber can be prevented.
【００１９】第２の発明では、吸気ダクトの通孔がブロ
ーバイ換気取入口に指向しているので、共鳴室に逆流し
たブローバイガスは、吸引力の強い吸気ダクトにそのま
ま吸い込まれ、共鳴室でのオイルミストの滞留が防止さ
れる。In the second aspect of the present invention, since the through-hole of the intake duct is directed to the blow-by ventilation inlet, the blow-by gas that has flowed back into the resonance chamber is sucked into the intake duct having a strong suction force as it is, so that the blow-by gas flows into the resonance chamber. The accumulation of oil mist is prevented.
【００２０】第３の発明では、ブローバイ換気取入口と
吸気ダクトの通孔が同一サイドにあるので、両者を結ぶ
距離が短く、逆流したブローバイガスが共鳴室に滞留す
ることなく、吸気ダクトに効率よく吸引される。In the third aspect of the invention, since the blow-by ventilation inlet and the through-hole of the intake duct are on the same side, the distance connecting the two is short, and the blow-by gas flowing backward does not stay in the resonance chamber, and the efficiency of the intake duct is reduced. Well sucked.
【００２１】第４の発明では、逆流したブローバイガス
の共鳴室での滞留を防ぐと共に、補助空気通路の取入口
がブローバイ換気取入口よりも上方に開口するので、逆
流したブローバイガス中のオイルミストが補助空気通路
には流入しにくく、補助空気通路のオイルミストによる
汚損が防止される。According to the fourth aspect of the present invention, the backflow of the blow-by gas is prevented from remaining in the resonance chamber, and the intake of the auxiliary air passage is opened above the blow-by ventilation intake. Is difficult to flow into the auxiliary air passage, and the contamination of the auxiliary air passage by oil mist is prevented.
【００２２】第５の発明では、ブローバイ換気取入口か
ら通孔までの距離よりも、補助空気取入口までの距離が
長く、このため逆流したブローバイガスは通孔に流入し
やすく、共鳴室での滞留が防がれると共に、補助空気通
路のオイルミストによる汚損を防ぐことができる。According to the fifth aspect, the distance from the blow-by ventilation inlet to the through hole is longer than the distance from the blow-by ventilation inlet to the auxiliary air intake. The stagnation can be prevented, and the contamination of the auxiliary air passage by the oil mist can be prevented.
【００２３】第６の発明では、吸気ダクトに関して、ブ
ローバイ換気取入口と補助空気取入口とが反対側に位置
するので、逆流したブローバイガスは通孔よりも補助空
気通路に流入しにくく、共鳴室での滞留が防止される共
に、補助空気通路のオイルミストによる汚損が防止され
る。In the sixth aspect of the present invention, since the blow-by ventilation intake and the auxiliary air intake are located on opposite sides with respect to the intake duct, the blow-by gas that flows backward is less likely to flow into the auxiliary air passage than the through-hole, and the resonance chamber is opened. And the contamination of the auxiliary air passage by oil mist is prevented.
【００２４】第７の発明では、共鳴室の内部がブローバ
イ換気通路と、補助空気通路とが接続する共鳴室に分離
され、かつブローバイ換気取入口よりも下方に通孔が設
けられるので、一方の共鳴室に逆流したブローバイガス
はその共鳴室に滞留することなく吸気ダクトへと吸引さ
れ、したがってオイルミストによる汚損防止が図れ、か
つ、他方の共鳴室に接続した補助空気通路へのブローバ
イガスの流入が確実に防止できる。In the seventh aspect, the inside of the resonance chamber is separated into the resonance chamber connected to the blow-by ventilation passage and the auxiliary air passage, and the through-hole is provided below the blow-by ventilation intake. The blow-by gas that has flowed back into the resonance chamber is sucked into the intake duct without staying in the resonance chamber, thereby preventing contamination by oil mist, and flowing the blow-by gas into the auxiliary air passage connected to the other resonance chamber. Can be reliably prevented.
【００２５】第８の発明では、吸気ダクトの通孔がブロ
ーバイ換気取入口に指向しているので、逆流したブロー
バイガスが共鳴室に滞留せずにそのまま吸気ダクトに吸
入されやすく、共鳴室のオイルミストによる汚損が防止
され、また、ブローバイ換気取入口が開口する共鳴室の
通孔よりも、他方の補助空気取入口が開口する共鳴室の
通孔が高い位置にあり、かつブローバイ換気取入口に対
して補助空気取入口は他方の共鳴室の上方に開口するた
め、他方の共鳴室を経由して補助空気通路にはオイルミ
ストは流入することは殆ど無く、オイルミストによる汚
損が確実に阻止できる。In the eighth aspect of the present invention, since the through-hole of the intake duct is directed to the blow-by ventilation inlet, the blow-by gas flowing backward does not stay in the resonance chamber and is easily sucked into the intake duct as it is. The contamination by the mist is prevented, and the through-hole of the resonance chamber where the other auxiliary air intake opens is higher than the through-hole of the resonance chamber where the blow-by ventilation intake opens. On the other hand, since the auxiliary air intake port opens above the other resonance chamber, almost no oil mist flows into the auxiliary air passage via the other resonance chamber, and the contamination by the oil mist can be reliably prevented. .
【００２６】[0026]
【実施例】図１〜図４は本発明の第１の実施例を示すも
ので、機関本体１の吸気マニホールド２とエアクリーナ
３は、吸気ダクト４を介して接続され、この吸気ダクト
４の途中には、吸気騒音を低減するために、図２〜図４
に示すようなレゾネータ５が取付けられる。1 to 4 show a first embodiment of the present invention. An intake manifold 2 of an engine body 1 and an air cleaner 3 are connected via an intake duct 4 and are located in the middle of the intake duct 4. In order to reduce the intake noise, FIG.
The resonator 5 shown in FIG.
【００２７】レゾネータ５は、箱状容器６の中央を吸気
ダクト４が気密的に貫通し、容器６の内部に形成された
共鳴室７と吸気ダクト４とは通孔８を介して連通し、こ
の共鳴室７の容積、通孔８の断面積等が、消音目標とす
る吸気騒音の周波数領域（機関回転数領域）と共鳴する
ように適切に設定される。なお、吸気ダクト４は箱状容
器６の中央を貫通せずに、吸気ダクト４の周囲の一部に
箱状容器６が設けられる構造でもよい。In the resonator 5, the intake duct 4 penetrates the center of the box-shaped container 6 in an airtight manner, and the resonance chamber 7 formed inside the container 6 and the intake duct 4 communicate with each other through the through hole 8. The volume of the resonance chamber 7, the cross-sectional area of the through hole 8, and the like are appropriately set so as to resonate with the frequency region (engine speed region) of the intake noise to be silenced. Note that the intake duct 4 may have a structure in which the box-shaped container 6 is provided partially around the intake duct 4 without penetrating the center of the box-shaped container 6.
【００２８】箱状容器６の側壁面には吸気ダクト４と直
交する方向からブローバイ換気通路１０の空気取入口１
１が接続し、また、この取入口１１とは吸気ダクト４の
通孔８を挟んで水平方向の反対側で、かつ取入口１１よ
りも高い側壁面位置に、吸気ダクト４とほぼ平行な方向
から補助空気通路１２の取入口１３が接続する。なお、
箱状容器６はやや楔型をした偏平な箱型で、断面積の大
きい側にブローバイ換気通路１０の取入口１１を接続さ
せている。The air inlet 1 of the blow-by ventilation passage 10 is provided on the side wall surface of the box-shaped container 6 in a direction perpendicular to the intake duct 4.
1 is connected to the intake port 11 on the side opposite to the horizontal direction across the through hole 8 of the intake duct 4 and at a side wall surface position higher than the intake port 11 in a direction substantially parallel to the intake duct 4. And the intake 13 of the auxiliary air passage 12 is connected. In addition,
The box-shaped container 6 is a flat box having a slightly wedge shape, and the inlet 11 of the blow-by ventilation passage 10 is connected to the side having the larger cross-sectional area.
【００２９】箱状容器６の中央を貫通する吸気ダクト４
の通孔８は、ブローバイ換気通路１０の取入口１１とほ
ぼ同一軸線上に対向し、取入口１１よりも下方にあっ
て、かつ取入口１１に向けて斜め上向きに設けられる。Inlet duct 4 penetrating through the center of box-shaped container 6
The through hole 8 is substantially coaxially opposed to the intake 11 of the blow-by ventilation passage 10, is provided below the intake 11, and is provided obliquely upward toward the intake 11.
【００３０】ブローバイ換気通路１０は機関本体１０の
上部ロッカルームに接続し、ブローバイガスの換気用の
空気を送り込み、図示しないピストンとシリンダの摺動
間隙からクランクルームに吹き抜けたブローバイガス
を、吸気通路のスロットル弁１５の下流に吸引還流させ
るようになっている。The blow-by ventilation passage 10 is connected to the upper rocker room of the engine body 10 to supply air for ventilation of blow-by gas, and blow-by gas blown into the crank room from a sliding gap between a piston and a cylinder (not shown) is supplied to the intake passage. The suction recirculation is performed downstream of the throttle valve 15.
【００３１】補助空気通路１２はスロットル弁１５を迂
回して補助空気を吸気通路に導入するもので、その導入
量を機関の運転条件に応じて制御するため図示しないコ
ントローラにより開度が調整される補助空気バルブ１６
が設けられる。The auxiliary air passage 12 bypasses the throttle valve 15 and introduces auxiliary air into the intake passage. The opening of the auxiliary air passage 12 is adjusted by a controller (not shown) in order to control the amount of introduction according to operating conditions of the engine. Auxiliary air valve 16
Is provided.
【００３２】次に作用を説明する。Next, the operation will be described.
【００３３】機関の作動に伴って発生する吸気騒音のう
ち吸気ダクト４の上流に向けて伝播してきたものは、レ
ゾネータ５の部分において、通孔８を介して連通する共
鳴室７での共鳴作用により、減衰、低減される。Of the intake noise generated by the operation of the engine, the one that has propagated upstream of the intake duct 4 has a resonance action in a resonance chamber 7 that communicates through a through hole 8 in a portion of the resonator 5. Thus, attenuation and reduction are achieved.
【００３４】一方、共鳴室７に接続した補助空気通路１
２の取入口１３よりスロットル弁１５を迂回して補助空
気が導入され、回転数を機関補機の駆動状態等に応じて
適切に増減制御する。同じく共鳴室７に接続したブロー
バイ換気通路１０の取入口１１からは、ブローバイガス
のスロットル弁１５下流への還流量に応じてクランクル
ームへ換気用空気が導入される。On the other hand, the auxiliary air passage 1 connected to the resonance chamber 7
Auxiliary air is introduced from the second intake 13 bypassing the throttle valve 15, and the number of revolutions is appropriately controlled to increase or decrease according to the driving state of the engine accessory. From the intake 11 of the blow-by ventilation passage 10 also connected to the resonance chamber 7, ventilation air is introduced into the crank room in accordance with the amount of blow-by gas recirculated downstream of the throttle valve 15.
【００３５】そして、機関の高速、高負荷時などブロー
バイガスの発生量が増加し、図示しないブローバイコン
トロールバルブの処理能力を越えたときには、ブローバ
イガスの一部がブローバイ換気通路１０から共鳴室７に
逆流する。逆流したブローバイガス中には少量のオイル
ミストが含まれるが、ブローバイ換気通路１０から断面
積の急拡大する共鳴室７に流入すると同時に流速が大幅
に低下し、重力により比重の大きいオイルミストは落下
する。また、このブローバイ換気通路１０の取入口１１
と対向して、その下方に吸気ダクト４の通孔８が開口
し、とくに高速、高負荷時には吸気ダクト４には高い負
圧が発生しているため、逆流したオイルミストを含むブ
ローバイガスの多くは、共鳴室７に滞留することなく、
そのまま通孔８を介して吸気ダクト４に吸引されてい
く。When the amount of generated blow-by gas increases, such as when the engine is running at a high speed or under a heavy load, and exceeds the processing capacity of a blow-by control valve (not shown), part of the blow-by gas is transferred from the blow-by ventilation passage 10 to the resonance chamber 7. Backflow. A small amount of oil mist is contained in the blow-by gas that flows backward, but the oil mist having a large specific gravity drops due to gravity when flowing into the resonance chamber 7 where the cross-sectional area expands rapidly from the blow-by ventilation passage 10 and at the same time the flow velocity is greatly reduced. I do. In addition, the intake 11 of the blow-by ventilation passage 10
A through hole 8 of the intake duct 4 is opened therebelow, and a large negative pressure is generated in the intake duct 4 particularly at high speed and high load. Does not stay in the resonance chamber 7,
The air is sucked into the intake duct 4 through the through hole 8 as it is.
【００３６】他方、共鳴室７からは補助空気通路１２に
上記のように補助空気が吸引されるが、この取入口１３
はブローバイ換気通路１０の取入口１１とは吸気ダクト
４を挟んで反対側にあり、しかもブローバイガスの逆流
点よりも高い位置にあるため、ブローバイガス中のオイ
ルミストが補助空気通路１２に直接吸入されることは殆
ど無い。On the other hand, auxiliary air is sucked from the resonance chamber 7 into the auxiliary air passage 12 as described above.
Is located on the opposite side of the intake duct 4 from the intake port 11 of the blow-by ventilation passage 10 and higher than the reverse flow point of the blow-by gas, so that the oil mist in the blow-by gas is directly sucked into the auxiliary air passage 12. Hardly ever.
【００３７】したがって、レゾネータ５の内部の共鳴室
７にオイルミストが滞留し、汚損されたり、あるいは補
助空気通路１２にオイルミストが流入し、補助空気バル
ブ１６にオイルミストが付着し、流量制御が不安定化す
ることなどが確実に防止できる。Therefore, the oil mist stays in the resonance chamber 7 inside the resonator 5 and is contaminated, or the oil mist flows into the auxiliary air passage 12, and the oil mist adheres to the auxiliary air valve 16, so that the flow rate is controlled. Instability can be reliably prevented.
【００３８】なお、ブローバイ換気通路１０や補助空気
通路１２を、吸気ダクト４の一部に設けたレゾネータ５
の箱状容器６に直接的に取り付けるので、これらの配管
の接続作業が容易になり、かつスペース的にもコンパク
トに集約できる。The blow-by ventilation passage 10 and the auxiliary air passage 12 are provided with a resonator 5 provided in a part of the intake duct 4.
Is directly attached to the box-shaped container 6, so that the work of connecting these pipes is facilitated and the space can be compactly integrated.
【００３９】次に図５の他の実施例を説明する。Next, another embodiment of FIG. 5 will be described.
【００４０】この実施例は、レゾネータ５の箱状容器６
の内部を隔壁１７により、２つの共鳴室７ａ，７ｂに分
離し、一方の共鳴室７ａにブローバイ換気通路１０の取
入口１１を、他方の共鳴室７ｂに補助空気通路１２の取
入口１３を開口させ、かつ取入口１３を取入口１１より
も上方に位置させ、吸気ダクト４に対しては２つの通孔
８ａ，８ｂを介してそれぞれ連通させる。この場合、共
鳴室７ａに連通する通孔８ａはブローバイ換気通路１０
の取入口１１に指向し、かつやや下方に位置するように
設けられ、また共鳴室７ｂに連通する通孔８ｂはこの通
孔８ａよりも上方に位置させる。In this embodiment, the box-shaped container 6 of the resonator 5
Is separated into two resonance chambers 7a and 7b by a partition wall 17, and an inlet 11 of the blow-by ventilation passage 10 is opened in one resonance chamber 7a and an inlet 13 of the auxiliary air passage 12 is opened in the other resonance chamber 7b. And the inlet 13 is positioned above the inlet 11 and communicates with the intake duct 4 via the two through holes 8a and 8b. In this case, the through hole 8a communicating with the resonance chamber 7a is
The through-hole 8b is provided so as to be directed toward the intake port 11 and slightly below, and is located above the through-hole 8a.
【００４１】このようにして、レゾネータ５の箱状容器
６の内部は２つの共鳴室７ａ，７ｂに分離され、かつブ
ローバイ換気通路１０と、補助空気通路１２とがそれぞ
れ異なる室に接続するので、高速、高負荷時など共鳴室
７ａにブローバイガスが逆流しても、多くはそのまま通
孔８ａを介して吸気ダクト４に吸引され、しかも、この
通孔８ａよりも共鳴室７ｂへの通孔８ｂが上にあり、か
つ補助空気通路１２の取入口１３はブローバイ換気通路
１０の取入口１１よりも上方に位置するため、逆流ブロ
ーバイガス中のオイルミストが補助空気通路１２に吸引
される可能性は極めて低い。In this way, the inside of the box-shaped container 6 of the resonator 5 is separated into two resonance chambers 7a and 7b, and the blow-by ventilation passage 10 and the auxiliary air passage 12 are connected to different chambers. Even when the blow-by gas flows back into the resonance chamber 7a at a high speed or a high load, most of the blow-by gas is directly sucked into the intake duct 4 through the through-hole 8a, and moreover, the through-hole 8b from the through-hole 8a to the resonance chamber 7b. And the intake 13 of the auxiliary air passage 12 is located higher than the intake 11 of the blow-by ventilation passage 10, so that there is a possibility that oil mist in the backflow blow-by gas is sucked into the auxiliary air passage 12. Extremely low.
【００４２】したがって、この実施例によれば、逆流し
たブローバイガス中のオイルミストは、レゾネータ５内
に滞留することなく、吸気ダクト４に吸引され、また補
助空気通路１２に吸引されることもほとんど無く、オイ
ルミストによるレゾネータ５や補助空気バルブ１６の汚
損をなお一層確実に防止できる。Therefore, according to this embodiment, the oil mist in the blow-by gas flowing backward does not stay in the resonator 5 and is sucked into the intake duct 4 and almost always into the auxiliary air passage 12. Therefore, the soiling of the resonator 5 and the auxiliary air valve 16 due to oil mist can be prevented more reliably.
【００４３】[0043]
【発明の効果】以上のように第１の発明によれば、機関
の高速、高負荷時などブローバイ換気通路から一部のブ
ローバイガスが共鳴室に逆流しても、ブローバイ換気取
入口よりも下方で、かつ水平よりも上方に向けて吸気ダ
クトの通孔が開口し、しかも機関高速高負荷時など吸気
ダクト内には強い負圧が発生しているため、逆流したブ
ローバイガスは通孔を介して吸気ダクトにそのまま吸入
され、共鳴室に滞留することがなく、このため、共鳴室
のオイルによる汚損を確実に防止することができる。As described above, according to the first aspect of the present invention, even if some blow-by gas flows back into the resonance chamber from the blow-by ventilation passage when the engine is running at a high speed or a high load, the blow-by ventilation inlet is located below the blow-by ventilation inlet. In addition, since the through-hole of the intake duct opens upward from the horizontal, and a strong negative pressure is generated in the intake duct, such as when the engine is running at high load, the blow-by gas that has flowed backwards passes through the through-hole. As a result, the air is sucked into the intake duct as it is and does not stay in the resonance chamber. Therefore, it is possible to reliably prevent the resonance chamber from being contaminated by oil.
【００４４】第２の発明によれば、吸気ダクトの通孔が
ブローバイ換気取入口に指向しているので、共鳴室に逆
流したブローバイガスは、吸引力の強い吸気ダクトにそ
のまま吸い込まれ、共鳴室でのオイルミストの滞留及び
汚損が防止される。According to the second aspect of the present invention, since the through-hole of the intake duct is directed to the blow-by ventilation inlet, the blow-by gas which has flowed back into the resonance chamber is sucked into the intake duct having a strong suction force as it is, and the resonance chamber is blown. Oil mist is prevented from staying and fouling.
【００４５】第３の発明によれば、ブローバイ換気取入
口と吸気ダクトの通孔が同一サイドにあるので、両者を
結ぶ距離が短く、逆流したブローバイガスが共鳴室に滞
留することなく、吸気ダクトに効率よく吸引される。According to the third aspect of the invention, since the blow-by ventilation inlet and the through-hole of the intake duct are on the same side, the distance connecting the two is short, and the blow-by gas flowing backward does not stay in the resonance chamber. It is sucked efficiently.
【００４６】第４の発明によれば、共鳴室へのブローバ
イガスの滞留を防止できると共に、補助空気通路の取入
口がブローバイ換気取入口よりも上方に開口するので、
逆流したブローバイガス中のオイルミストが補助空気通
路には流入しにくく、補助空気通路のオイルミストによ
る汚損が防止される。According to the fourth aspect, the blow-by gas can be prevented from staying in the resonance chamber, and the intake of the auxiliary air passage is opened above the blow-by ventilation intake.
The oil mist in the blow-by gas that has flowed backward does not easily flow into the auxiliary air passage, so that the oil mist in the auxiliary air passage is prevented from being stained.
【００４７】第５の発明によれば、ブローバイ換気取入
口から通孔までの距離よりも、補助空気取入口までの距
離が長く、このため逆流したブローバイガスは補助空気
通路よりも通孔に流入しやすく、共鳴室のオイルミスト
による汚損が阻止されると共に補助空気通路のオイルミ
ストによる汚損を防ぐことができる。According to the fifth aspect, the distance from the blow-by ventilation inlet to the through hole is longer than the distance from the blow-by ventilation inlet to the auxiliary air intake, so that the blow-by gas flowing backward flows into the through-hole rather than the auxiliary air passage. This makes it possible to prevent contamination of the resonance chamber by oil mist and prevent contamination of the auxiliary air passage by oil mist.
【００４８】第６の発明によれば、共鳴室の吸気ダクト
に関して、ブローバイ換気取入口と補助空気取入口とが
反対側に位置するので、逆流したブローバイガスは通孔
よりも補助空気通路に流入しにくく、共鳴室がオイルミ
ストにより汚損されるのを防止すると共に、補助空気通
路のオイルミストによる汚損が防止される。According to the sixth aspect of the invention, since the blow-by ventilation intake and the auxiliary air intake are located on opposite sides with respect to the intake duct of the resonance chamber, the blow-by gas flowing backward flows into the auxiliary air passage rather than the through hole. This prevents the resonance chamber from being contaminated by oil mist and prevents the auxiliary air passage from being contaminated by oil mist.
【００４９】第７の発明によれば、共鳴室の内部がブロ
ーバイ換気通路と、補助空気通路とが接続する共鳴室に
分離され、かつブローバイ換気取入口よりも下方に通孔
が設けられるので、一方の共鳴室に逆流したブローバイ
ガスはその共鳴室に滞留することなく吸気ダクトへと吸
引され、したがって共鳴室のオイルミストによる汚損防
止が図れ、かつ、他方の共鳴室に接続した補助空気通路
へのブローバイガスの流入が確実に防止できる。According to the seventh aspect, the interior of the resonance chamber is separated into the resonance chamber where the blow-by ventilation passage and the auxiliary air passage are connected, and the through-hole is provided below the blow-by ventilation intake. The blow-by gas that has flowed back into one of the resonance chambers is sucked into the intake duct without stagnation in the resonance chamber, so that contamination by oil mist in the resonance chamber can be prevented, and the blow-by gas flows into the auxiliary air passage connected to the other resonance chamber. Of the blow-by gas can be reliably prevented.
【００５０】第８の発明によれば、吸気ダクトの通孔が
ブローバイ換気取入口に指向しているので、逆流したブ
ローバイガスが共鳴室に滞留せずにそのまま吸気ダクト
に吸入されやすく、共鳴室のオイルミストによる汚損が
防止され、また、ブローバイ換気取入口が開口する共鳴
室の通孔よりも、他方の補助空気取入口が開口する共鳴
室の通孔が高い位置にあり、かつブローバイ換気取入口
に対して補助空気取入口は他方の共鳴室の上方に開口す
るため、他方の共鳴室を経由して補助空気通路にはオイ
ルミストは流入することは殆ど無く、オイルミストによ
る汚損が確実に阻止できる。According to the eighth aspect, since the through-hole of the intake duct is directed to the blow-by ventilation intake, the blow-by gas flowing backward does not stay in the resonance chamber and is easily sucked into the intake duct as it is. The oil mist is prevented from being contaminated, and the through hole of the resonance chamber where the other auxiliary air intake opens is higher than the through hole of the resonance chamber where the blowby ventilation intake opens, and the blow-by ventilation Since the auxiliary air intake port opens above the other resonance chamber with respect to the inlet, almost no oil mist flows into the auxiliary air passage via the other resonance chamber, and the contamination by the oil mist is surely prevented. Can be blocked.
【図１】本発明の第１の実施例を示す全体的な平面図で
ある。FIG. 1 is an overall plan view showing a first embodiment of the present invention.
【図２】同じくレゾネータの斜視図である。FIG. 2 is a perspective view of the resonator.
【図３】同じくレゾネータの平面図である。FIG. 3 is a plan view of the resonator.
【図４】同じくレゾネータの断面図である。FIG. 4 is a sectional view of the resonator.
【図５】第２の実施例を示すレゾネータの断面図であ
る。FIG. 5 is a sectional view of a resonator showing a second embodiment.
４ 吸気ダクト ５ レゾネータ ６ 箱状容器 ７ 共鳴室 ８ 通孔 １０ ブローバイ換気通路 １１ 取入口 １２ 補助空気通路 １３ 取入口 １５ スロットル弁 １６ 補助空気バルブ Reference Signs List 4 intake duct 5 resonator 6 box-shaped container 7 resonance chamber 8 through hole 10 blow-by ventilation passage 11 intake 12 auxiliary air passage 13 intake 15 throttle valve 16 auxiliary air valve
Claims (8)
室を備えた内燃機関の吸気ダクト装置において、前記通
孔を水平よりも上方に向けて共鳴室に開口させ、かつこ
の共鳴室にブローバイ換気通路の取入口を接続し、かつ
この取入口を前記通孔よりも上方に開口させたことを特
徴とする内燃機関の吸気ダクト装置。1. A resonance communicating with an intake duct via a through hole.
In an intake duct device for an internal combustion engine provided with a chamber, the through hole is opened to a resonance chamber upward from horizontal, and an intake of a blow-by ventilation passage is connected to the resonance chamber, and the intake is connected to the resonance chamber. An intake duct device for an internal combustion engine, wherein the intake duct device is opened above the through hole.
の指向する方向の近傍の共鳴室壁面に開口している請求
項１に記載の内燃機関の吸気ダクト装置。2. The intake duct device for an internal combustion engine according to claim 1, wherein the blow-by ventilation inlet is opened in a wall of the resonance chamber near a direction in which the through hole is directed.
吸気通路の軸心に関して水平方向の同一サイドに位置さ
せる請求項１に記載の内燃機関の吸気ダクト装置。3. The blow-by ventilation inlet and the through hole,
2. The intake duct device for an internal combustion engine according to claim 1, wherein the intake duct device is located on the same side in the horizontal direction with respect to the axis of the intake passage.
る補助空気通路の取入口を接続し、この補助空気取入口
を前記ブローバイ換気取入口よりも上方に開口させる請
求項１に記載の内燃機関の吸気ダクト装置。4. The internal combustion engine according to claim 1, wherein an intake of an auxiliary air passage bypassing an intake throttle valve is connected to the resonance chamber, and the auxiliary air intake is opened above the blow-by ventilation intake. Air intake duct device.
とを結ぶ距離よりも、補助空気通孔の取入口と通孔とを
結ぶ距離が長くなる位置に補助空気通路の取入口を開口
させる請求項４に記載の内燃機関の吸気ダクト装置。5. The intake of the auxiliary air passage is opened at a position where the distance between the intake of the auxiliary air through hole and the through hole is longer than the distance between the intake of the blow-by ventilation passage and the through hole. An intake duct device for an internal combustion engine according to claim 4.
空気通路の取入口とを、吸気通路の軸心に関して水平方
向の互いに異なったサイドに位置させる請求項４に記載
の内燃機関の吸気ダクト装置。6. The intake duct device for an internal combustion engine according to claim 4, wherein the intake of the blow-by ventilation passage and the intake of the auxiliary air passage are located on different sides in the horizontal direction with respect to the axis of the intake passage. .
室を備えた内燃機関の吸気ダクト装置において、前記共
鳴室の内部を隔壁を介して２つの共鳴室に仕切り、一方
の共鳴室にブローバイ換気通路の取入口、他方の共鳴室
には吸気スロットル弁を迂回する補助空気通路の取入口
を開口させ、かつ各共鳴室に対して吸気ダクトの通孔を
それぞれ連通し、ブローバイ換気取入口が開口する共鳴
室の通孔をこのブローバイ換気取入口よりも下方に配置
したことを特徴とする内燃機関の吸気ダクト装置。7. A resonance communicating with an intake duct via a through hole.
In an intake duct device for an internal combustion engine provided with a chamber, the interior of the resonance chamber is divided into two resonance chambers via a partition, and one of the resonance chambers has an intake of a blow-by ventilation passage, and the other resonance chamber has an intake throttle valve. Open the intake of the auxiliary air passage detouring around, and communicate the through-hole of the intake duct with each resonance chamber, and make the through-hole of the resonance chamber where the blow-by ventilation intake opens more than this blow-by ventilation intake. An intake duct device for an internal combustion engine, which is disposed below.
入口よりも高い位置に配置する一方、ブローバイ換気取
入口が開口する共鳴室の通孔をブローバイ換気取入口に
指向させ、かつブローバイ換気取入口が開口する共鳴室
の通孔よりも、他方の補助空気取入口が開口する共鳴室
の通孔を高い位置に設けた請求項７に記載の内燃機関の
吸気ダクト装置。8. The blow-by ventilation inlet, wherein the auxiliary air intake is disposed at a position higher than the blow-by ventilation intake, while the through-hole of the resonance chamber where the blow-by ventilation intake opens is directed to the blow-by ventilation intake. 8. The intake duct device for an internal combustion engine according to claim 7, wherein a through hole of the resonance chamber in which the other auxiliary air inlet opens is provided at a position higher than a through hole of the resonance chamber in which the nozzle opens.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09354094A JP3232869B2 (en) | 1994-05-02 | 1994-05-02 | Intake duct device for internal combustion engine |
| KR1019950010887A KR0153162B1 (en) | 1994-05-02 | 1995-04-28 | Air intake duct device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09354094A JP3232869B2 (en) | 1994-05-02 | 1994-05-02 | Intake duct device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07301165A JPH07301165A (en) | 1995-11-14 |
| JP3232869B2 true JP3232869B2 (en) | 2001-11-26 |
Family
ID=14085112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09354094A Expired - Fee Related JP3232869B2 (en) | 1994-05-02 | 1994-05-02 | Intake duct device for internal combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3232869B2 (en) |
| KR (1) | KR0153162B1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202005014688U1 (en) * | 2005-09-16 | 2007-02-01 | Mann + Hummel Gmbh | resonator |
| CN102644531B (en) * | 2011-02-16 | 2015-02-25 | 曼·胡默尔有限公司 | Resonant system |
| JP6043477B2 (en) * | 2011-12-01 | 2016-12-14 | Ｕｄトラックス株式会社 | Blow-by gas reduction device and abnormality diagnosis method for blow-by gas reduction device |
| JP5980139B2 (en) * | 2013-02-06 | 2016-08-31 | 小島プレス工業株式会社 | Vehicle silencer |
| JP2014185530A (en) * | 2013-03-21 | 2014-10-02 | Aichi Machine Industry Co Ltd | Blow-by gas recirculation structure |
| JP5967310B2 (en) * | 2013-07-31 | 2016-08-10 | 日産自動車株式会社 | Blow-by gas processing device for internal combustion engine |
| JP6551441B2 (en) * | 2017-03-24 | 2019-07-31 | マツダ株式会社 | Engine ventilation system |
-
1994
- 1994-05-02 JP JP09354094A patent/JP3232869B2/en not_active Expired - Fee Related
-
1995
- 1995-04-28 KR KR1019950010887A patent/KR0153162B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR0153162B1 (en) | 1998-11-16 |
| KR950033048A (en) | 1995-12-22 |
| JPH07301165A (en) | 1995-11-14 |
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