JPH0333428A - Suction device of internal combustion engine - Google Patents
Suction device of internal combustion engineInfo
- Publication number
- JPH0333428A JPH0333428A JP16767189A JP16767189A JPH0333428A JP H0333428 A JPH0333428 A JP H0333428A JP 16767189 A JP16767189 A JP 16767189A JP 16767189 A JP16767189 A JP 16767189A JP H0333428 A JPH0333428 A JP H0333428A
- Authority
- JP
- Japan
- Prior art keywords
- internal combustion
- combustion engine
- intake
- valve
- expansion 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 56
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000010349 pulsation Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Characterised By The Charging Evacuation (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は内燃機関の吸気装置に係り、特にエアクリー
ナからの吸気を内燃機関に吸気通路を介して導入する際
に、内燃機関の運転状態に応じて吸気の体積効率を変化
させ、出力の向上を図る内燃機関の吸気装置に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an intake system for an internal combustion engine, and in particular, when introducing air from an air cleaner into the internal combustion engine through an intake passage, the invention relates to an intake system for an internal combustion engine. The present invention relates to an intake device for an internal combustion engine that changes the volumetric efficiency of intake air accordingly to improve output.
［従来の技術］
内燃機関の吸気装置は、エアクリーナから新気を取り込
み、気化器において新気と燃料とによって混合気である
吸気を生成し、吸気通路によって吸気を内燃機関の燃焼
室に供給し、吸気を燃焼させている。[Prior Art] An intake system for an internal combustion engine takes in fresh air from an air cleaner, generates intake air as a mixture of fresh air and fuel in a carburetor, and supplies the intake air to the combustion chamber of the internal combustion engine through an intake passage. , burning the intake air.
前記内燃機関の吸気装置としては、特公昭５９−２２０
４５号公報に開示されるものがある。この公報に開示さ
れる内燃機関の吸気装置は、吸気管または吸気マニホー
ルドに１つまたはそれ以上の適当な一定の容積を持つ空
間を開閉弁を介して連結するとともに、開閉弁の開閉操
作により吸気弁または吸気マニホールドの容積を弁開時
と弁閉時とで変更し、例えば機関の最大出力運転時と最
大トルク運転時との２つの運転時に夫々吸気慣性過給を
確実に行い、各作動時の高出力化を図っている。As the intake system for the internal combustion engine, the Japanese Patent Publication No. 59-220
There is one disclosed in Publication No. 45. The intake system for an internal combustion engine disclosed in this publication connects one or more spaces with an appropriate constant volume to an intake pipe or an intake manifold via an on-off valve, and intake air by opening and closing the on-off valve. By changing the volume of the valve or intake manifold when the valve is open and when the valve is closed, for example, intake inertia supercharging is performed reliably during the two operations of the engine, such as maximum output operation and maximum torque operation. The aim is to achieve high output.
［発明が解決しようとする問題点コ
ところで、従来の内燃機関の吸気装置の、特に４サイク
ル内燃機関の吸気装置においては、機関出力を向上させ
る場合に、吸気系の吸気脈動及び吸気慣性を主に利用し
て体積効率を向上させる必要がある。[Problems to be Solved by the Invention] By the way, in conventional intake systems for internal combustion engines, particularly in intake systems for 4-cycle internal combustion engines, when improving engine output, the intake pulsation and intake inertia of the intake system are mainly considered. It is necessary to improve volumetric efficiency by utilizing
一般に、高回転・高出力型の内燃機関においては、体積
効率を向上させることが特に必要な課題である。Generally, in high-speed, high-output internal combustion engines, it is particularly necessary to improve volumetric efficiency.
また、内燃機関の高回転域、すなわちピーク域付近にお
いて出力を向上させる場合には、吸気ポート形状を極力
太くする必要があるが、吸気ポート形状を太くすると、
通気抵抗が減少して吸気流速が低下するものであり、一
般的にはこの通気抵抗の減少を勘案した形状としている
。In addition, when increasing the output in the high rotation range of an internal combustion engine, that is, near the peak range, it is necessary to make the intake port shape as wide as possible, but if the intake port shape is made thick,
The ventilation resistance is reduced and the intake flow rate is lowered, and the shape is generally designed to take this reduction in ventilation resistance into consideration.
しかし、吸気ボートを太くして高回転域における出力向
上を果たしても、低速あるいは中速域での吸気流速が低
下することとなり、体積効率の悪化を招くものである。However, even if the intake boat is made thicker to improve the output in the high speed range, the intake flow velocity in the low or medium speed range decreases, resulting in a deterioration of the volumetric efficiency.
このため、第１２図に示す如く、内燃機関１０２の吸気
マニホルド１０８内に第１、第２吸気通路１１４−Ｌ
１１４−２を設け、これら第１、第２吸気通路１１４
−Ｌ １１４−２のいずれか一方、例えば第２吸気通
路１１４−２に、第１３図に示す如く、スロットルバル
ブ１４０と同一形状の開閉弁１２０を設け、この開閉弁
１２０の開度によって吸気流速を調整し、トルクの低下
を防止している。For this reason, as shown in FIG.
114-2 are provided, and these first and second intake passages 114
-L 114-2, for example, the second intake passage 114-2, is provided with an on-off valve 120 having the same shape as the throttle valve 140, as shown in FIG. is adjusted to prevent a decrease in torque.
しかし、前記開閉弁１２０が板状部材によって形成され
ていることにより、開閉弁１２０が吸気抵抗となり易い
という不都合がある。However, since the on-off valve 120 is formed of a plate-like member, there is a disadvantage that the on-off valve 120 tends to cause intake resistance.
また、第１４図に示す如く、吸気マニホルド２０８内に
長さの異なる第１、第２吸気通路２１４−１．２１４−
２を設けるとともに、長さの短い第１吸気通路２１４−
１途中に開閉弁２２０を設け、第１、第２吸気通路２１
４−１．２１４−２によって吸気脈動を利用して体積効
率を向上させている。In addition, as shown in FIG. 14, first and second intake passages 214-1, 214- of different lengths are provided in the intake manifold 208.
2 and a short first intake passage 214-
An on-off valve 220 is provided midway through the first and second intake passages 21.
4-1.214-2, the volumetric efficiency is improved by utilizing intake pulsation.
しかし、上述のものと同様に、前記開閉弁２２０が板状
部材によって形成されていることにより、吸気抵抗とな
り易いとともに、第１、第２吸気通路の長さ変更を行う
変極点のセツティングが非常に困難であり、使い勝手が
悪いという不都合がある。However, like the above-mentioned one, since the on-off valve 220 is formed of a plate-like member, it tends to cause intake resistance, and the setting of the inflection point at which the length of the first and second intake passages is changed is difficult. This method has the disadvantage of being extremely difficult and inconvenient to use.
［発明の目的コ
そこでこの発明の目的は、上述不都合を除去するために
、内燃機関の吸気装置の吸気通路途中に拡張室を設ける
とともに、この拡張室を開閉する開閉弁を設け、開閉弁
の弁軸に半径方向に貫通する孔部を設け、内燃機関の運
転状態により弁軸を回動させ所望に応じて吸気通路と拡
張室とを連通ずるとともに内燃機関の運転状態に応じた
体積効率とすべく制御する制御部を設けたことにより、
内燃機関の全領域における出力を向上し得るとともに、
乗車感をも向上し得る内燃機関の吸気装置を実現するに
ある。[Purpose of the Invention] In order to eliminate the above-mentioned disadvantages, the purpose of the present invention is to provide an expansion chamber in the middle of the intake passage of the intake system of an internal combustion engine, and to provide an on-off valve for opening and closing this expansion chamber. A hole is provided in the valve stem that penetrates in the radial direction, and the valve stem is rotated depending on the operating condition of the internal combustion engine to communicate the intake passage and the expansion chamber as desired, and to improve the volumetric efficiency according to the operating condition of the internal combustion engine. By providing a control unit to control the
It is possible to improve the output in all areas of the internal combustion engine, and
An object of the present invention is to realize an intake device for an internal combustion engine that can also improve riding comfort.
〔問題点を解決するための手段］
この目的を達成するためにこの発明は、エアクリーナか
らの吸気を内燃機関に吸気通路を介して導入する内燃機
関の吸気装置において、前記吸気通路途中に拡張室を設
けるとともにこの拡張室を開閉する開閉弁を設け、開閉
弁の弁軸に半径方向に貫通する孔部を設け、前記内燃機
関の運転状態により前記弁軸を回動させ所望に応じて前
記吸気通路と拡張室とを連通ずるとともに前記内燃機関
の運転状態に応じた体積効率とすべく制御する制御部を
設けたことを特徴とする。[Means for Solving the Problems] To achieve this object, the present invention provides an intake system for an internal combustion engine that introduces intake air from an air cleaner into an internal combustion engine through an intake passage, in which an expansion chamber is provided in the middle of the intake passage. and an on-off valve for opening and closing this expansion chamber, and a hole passing through the valve shaft in the radial direction is provided in the valve shaft of the on-off valve, and the valve shaft is rotated depending on the operating state of the internal combustion engine to control the intake air as desired. The present invention is characterized in that a control unit is provided that communicates the passage with the expansion chamber and controls the volumetric efficiency in accordance with the operating state of the internal combustion engine.
［作用コ
上述の如く構成したことにより、内燃機関の運転状態が
低速域の際には、制御部によって弁軸を吸気通路の絞り
方向に回動させ、吸気通路と拡張室との連通を解除する
とともに、体積効率を小とすべく制御し、また中速域の
際には、制御部によって弁軸を吸気通路の絞り方向と反
対方向に回動させ、孔部によって吸気通路と拡張室とを
連通させるとともに、体積効率を中とすべく制御し、更
に高速域の際には、制御部によって弁軸を吸気通路の絞
り方向と反対方向に更に回動させ、孔部によって吸気通
路と拡張室とを連通させるとともに、体積効率を略最大
とすべく制御し、内燃機関の低速・中速◆高速の全領域
における出力を向上するとともに、乗車感をも向上させ
ている。[Operation] With the above-mentioned configuration, when the internal combustion engine is operating in a low speed range, the control section rotates the valve shaft in the direction of restricting the intake passage and releases the communication between the intake passage and the expansion chamber. At the same time, the volumetric efficiency is controlled to be small, and in the middle speed range, the control section rotates the valve shaft in the opposite direction to the throttle direction of the intake passage, and the hole allows the intake passage and expansion chamber to be connected. At the same time, the volumetric efficiency is controlled to be medium. Furthermore, at high speeds, the control section further rotates the valve shaft in the opposite direction to the direction in which the intake passage is throttled, and the hole expands the intake passage. In addition to communicating with the interior of the engine, the volumetric efficiency is controlled to approximately the maximum, improving the internal combustion engine's output in all low-speed, medium-speed and high-speed ranges, as well as improving riding comfort.
［実施例コ
以下図面に基づいてこの発明の実施例を詳細に説明する
。[Embodiments] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
第１〜１１図はこの発明の実施例を示すものである。第
１．２図において、２は内燃機関、４はシリンダヘッド
、８は吸気ポート、８は吸気マニホルド、１０は気化器
、１２はエアクリーナ、１４は吸気通路である。1 to 11 show embodiments of this invention. In FIG. 1.2, 2 is an internal combustion engine, 4 is a cylinder head, 8 is an intake port, 8 is an intake manifold, 10 is a carburetor, 12 is an air cleaner, and 14 is an intake passage.
前記内燃機関２の気化器１０よりも下流側の吸気通路１
４途中に、略正方形状に形成される拡張室１６を設ける
。An intake passage 1 downstream of the carburetor 10 of the internal combustion engine 2
4, an expansion chamber 16 formed in a substantially square shape is provided in the middle.
この拡張室１６は、第３．４図に示す如く、中空部ｌｅ
ａの略中央部位に前記吸気通路１４に対し平行、且つ吸
気通路１４の下流側方向から上流側方向に突出するスト
ッパ部１８を有する。As shown in Fig. 3.4, this expansion chamber 16 has a hollow part le.
A stopper portion 18 is provided approximately at the center of the arrow a, parallel to the intake passage 14, and protruding from the downstream direction to the upstream direction of the intake passage 14.
また、前記吸気通路１４に対し拡張室１６を開閉する開
閉弁２０を設け、この開閉弁２０の弁軸２２部位に半径
方向に貫通する孔部２４を設ける。Further, an on-off valve 20 for opening and closing the expansion chamber 16 with respect to the intake passage 14 is provided, and a hole 24 penetrating in the radial direction is provided at a portion of the valve shaft 22 of this on-off valve 20.
すなわち、第５図に示す如く、気筒数に合致する複数個
の開閉弁２０を一本の弁軸２２によって連結し、開閉弁
２０の弁軸２２部位には弁軸２２の中心を通過し且つ開
閉弁２０に対して所定の傾斜を有すべく孔部２４が穿設
されている。That is, as shown in FIG. 5, a plurality of on-off valves 20 corresponding to the number of cylinders are connected by a single valve shaft 22, and the valve shaft 22 of the on-off valve 20 has a valve that passes through the center of the valve shaft 22 and A hole 24 is bored to have a predetermined slope with respect to the on-off valve 20.
そして、前記開閉弁２０を、第１．４図に示す如く、上
流側に回転中心を有すべく配設し、この開閉弁２０の弁
軸２２に後述するサーボモータ３０の駆動力をワイヤ２
６を介して伝達させ開閉弁２０を回動可能に構成する。As shown in FIG. 1.4, the on-off valve 20 is arranged to have its rotation center on the upstream side, and the driving force of a servo motor 30, which will be described later, is applied to the valve shaft 22 of the on-off valve 20 through a wire 2.
6, and the on-off valve 20 is configured to be rotatable.
前記内燃機関２の運転状態により前記弁軸２２゛を回動
させ所望に応じて前記吸気通路１４と拡張室１６とを連
通ずるとともに、運転状態に応じた体積効率とすべく制
御する制御部２８を設ける。a control section 28 that rotates the valve shaft 22' depending on the operating state of the internal combustion engine 2 to establish communication between the intake passage 14 and the expansion chamber 16 as desired, and controls the volumetric efficiency in accordance with the operating state; will be established.
詳述すれば、制御部２８は、第９図に示す如く、エンジ
ン回転数やスロットル開度、吸気圧、点火時期の各検出
信号を入力し、前記サーボモータ３０に命令を出力して
ワイヤ２６により前記開閉弁２０を所望の開閉状態とす
べく制御するものである。Specifically, as shown in FIG. 9, the control section 28 inputs detection signals such as engine speed, throttle opening, intake pressure, and ignition timing, outputs commands to the servo motor 30, and outputs a command to the wire 26. The on-off valve 20 is controlled to be in a desired open/close state.
つまり、前記内燃機関２の運転状態が低速域の際には、
制御部２８によって弁軸２２を前記吸気通路１４の絞り
方向に回動させ、吸気通路１４と拡張室１６との連通を
解除するとともに、体積効率を小とすべく制御し、中速
域の際には、制御部２８によって弁軸２２を吸気通路１
４の絞り方向と反対方向に回動させ、孔部２４によって
吸気通路１４と拡張室１６とを連通させるとともに、体
積効率を中とすべく制御し、また高速域の際には、制御
部２８によって弁軸２２を吸気通路１４の絞り方向と反
対方向に更に回動させ、孔部２４によって吸気通路１４
と拡張室１６とを連通させるとともに、体積効率を略最
大とすべく制御する。That is, when the operating state of the internal combustion engine 2 is in a low speed range,
The control unit 28 rotates the valve shaft 22 in the direction of constricting the intake passage 14 to release the communication between the intake passage 14 and the expansion chamber 16, and also controls the volumetric efficiency to be small. In this case, the valve shaft 22 is connected to the intake passage 1 by the control unit 28.
4 in the opposite direction to the throttle direction, the hole 24 communicates the intake passage 14 with the expansion chamber 16, and the volumetric efficiency is controlled to be medium. The valve shaft 22 is further rotated in the direction opposite to the throttle direction of the intake passage 14, and the hole 24
and the expansion chamber 16, and the volumetric efficiency is controlled to be approximately maximized.
なお符号３２は吸気弁、３４は排気弁、３６は排気ポー
トである。Note that 32 is an intake valve, 34 is an exhaust valve, and 36 is an exhaust port.
次に作用について説明する。Next, the effect will be explained.
前記内燃機関２の運転状態が低速域の際には、制御部２
８からの命令によってサーボモータ３０を駆動させ、サ
ーボモータ３０の駆動力をワイヤ２６により弁軸２２に
伝達して弁軸２２を前記吸気通路１４の絞り方向に回動
させ、第６図に示す如く、孔部２４による吸気通路１４
と拡張室１６との連通を解除するとともに、開閉弁２０
によって吸気通路１４の通路断面積を極端に絞り、体積
効率を小とすべく制御する。そして、低速域における吸
気流速を大としている。When the operating state of the internal combustion engine 2 is in a low speed range, the control section 2
The servo motor 30 is driven by the command from 8, and the driving force of the servo motor 30 is transmitted to the valve shaft 22 through the wire 26 to rotate the valve shaft 22 in the direction of restricting the intake passage 14, as shown in FIG. As shown, the intake passage 14 by the hole 24
At the same time, the on-off valve 20 is disconnected from the expansion chamber 16.
As a result, the cross-sectional area of the intake passage 14 is extremely narrowed, and the volumetric efficiency is controlled to be small. In addition, the intake flow velocity in the low speed range is increased.
また、中速域の際には、制御部２８によって弁軸２２を
前記吸気通路１４の絞り方向と反対方向に回動させ、第
７図に示す如く、孔部２４によって吸気通路１４と拡張
室１６とを連通させるとともに、開閉弁２０による吸気
通路１４の通路断面積の絞り量を少許大きくシ、体積効
率を中とすべく制御する。In addition, in the medium speed range, the control section 28 rotates the valve shaft 22 in the opposite direction to the throttle direction of the intake passage 14, and as shown in FIG. 16, and the amount of restriction of the passage cross-sectional area of the intake passage 14 by the on-off valve 20 is controlled to a slightly large extent so that the volumetric efficiency is medium.
更に、高速域の際には、制御部２８によって弁軸２２を
前記吸気通路１４の絞り方向と反対方向に更に回動させ
、第８図に示す如く、孔部２４によって吸気通路１４と
拡張室１６とを連通させるとともに、開閉弁２０による
吸気通路１４の通路断面積の絞り量を略零とし、体積効
率を最大とすべく制御する。Further, in the high speed range, the control unit 28 further rotates the valve shaft 22 in the opposite direction to the throttle direction of the intake passage 14, and as shown in FIG. 16, and the amount of restriction of the passage cross-sectional area of the intake passage 14 by the on-off valve 20 is set to approximately zero, thereby controlling the volumetric efficiency to be maximized.
これにより、前記内燃機関２の低速域においては、前記
開閉弁２０によって吸気通路１４を絞り、吸気流速を大
として出力を向上させることができる。As a result, in the low speed range of the internal combustion engine 2, the intake passage 14 is throttled by the on-off valve 20, and the intake flow rate is increased, thereby improving the output.
また、前記内燃機関２の中速域においては、前記開閉弁
２０により吸気流速を大とし、且つ孔部２４によって吸
気通路１４と拡張室１６とを連通させ、出力を向上させ
ることができるとともに、吸気脈動による体積効率の向
上をも果たすことができる。Further, in the medium speed range of the internal combustion engine 2, the intake flow velocity is increased by the on-off valve 20, and the intake passage 14 and the expansion chamber 16 are communicated with each other by the hole 24, so that the output can be improved. It is also possible to improve volumetric efficiency through intake pulsation.
更に、前記内燃機関２の高速域においては、開閉弁２０
による吸気通路１４の通路断面積の絞り量を略零とし、
体積効率を最大とし、排ガス対策上からカムなどの部品
のオーバラップが極端に少なくなり、出力が低下する慣
れが全くないものである。Furthermore, in the high speed range of the internal combustion engine 2, the on-off valve 20
The amount of restriction of the passage cross-sectional area of the intake passage 14 is made approximately zero,
It maximizes volumetric efficiency and has extremely little overlap of parts such as cams in order to prevent exhaust gases, so there is no problem with output decreasing.
更にまた、上述の如く３態様の内燃機関２の各運転状態
における不具合を解消できることにより、全領域におい
て出力向上や体積効率間上等の良好な作用効果を奏する
ことができる。Furthermore, as described above, by being able to eliminate problems in each of the three operating states of the internal combustion engine 2, good effects such as improved output and volumetric efficiency can be achieved in all regions.
また、前記内燃機関２の全ての運転状態において良好な
作用効果を奏することができることにより、例えば４輪
車の乗車感を向上し得て、実用上有利である。Furthermore, since good effects can be achieved in all operating conditions of the internal combustion engine 2, the riding feeling of a four-wheeled vehicle can be improved, for example, which is advantageous in practice.
更に、第１０図に示す如く、前記拡張室１６及び開閉弁
２０の個々の出力特性をノーマルのものと比較すると、
種々劣る箇所を検出することができるが、前記拡張室１
６及び開閉弁２０の出力特性を合体させると、第１１図
に示す如く、全領域においてノーマルよりも優れた出力
特性を得ることができ、理想的な可変吸気システムを実
現できるものである。Furthermore, as shown in FIG. 10, when the individual output characteristics of the expansion chamber 16 and the on-off valve 20 are compared with normal ones,
Various inferior points can be detected, but the expansion chamber 1
By combining the output characteristics of 6 and the on-off valve 20, as shown in FIG. 11, it is possible to obtain an output characteristic that is superior to the normal one in the entire range, making it possible to realize an ideal variable intake system.
なお、この発明は上述実施例に限定されるものではなく
、種々の応用改変が可能である。Note that the present invention is not limited to the above-described embodiments, and various modifications can be made.
例えば、この発明の実施例においては、内燃機関の運転
状態の低速・中速・高速の３態様において制御する構成
としたが、開閉弁がアナログ式に開閉制御されることに
より、内燃機関の運転状態を４態様以上に分割して細か
く制御する構成とすることも可能である。For example, in the embodiment of the present invention, the internal combustion engine is controlled in three operating states: low speed, medium speed, and high speed. It is also possible to have a configuration in which the state is divided into four or more modes for fine control.
［発明の効果］
以上詳細に説明した如くこの発明によれば、内燃機関の
吸気装置の吸気通路途中に拡張室を設けるとともに、こ
の拡張室を開閉する開閉弁を設け、開閉弁の弁軸に半径
方向に貫通する孔部を設け、内燃機関の運転状態により
弁軸を回動させ所望に応じて吸気通路と拡張室とを連通
ずるとともに内燃機関の運転状態に応じた体積効率とす
べく制御する制御部を設けたので、前記内燃機関の低速
域及び中速域、そして高速域の各運転状態における不具
合を解消でき、全領域において出力向上や体積効率間上
等の良好な作用効果を奏し得るものである。また、前記
内燃機関の全ての運転状態において良好な作用効果を奏
することができることにより、例えば４輪車の乗車感を
向上し得て、実用上有利である。[Effects of the Invention] As explained in detail above, according to the present invention, an expansion chamber is provided in the middle of the intake passage of the intake system of an internal combustion engine, and an on-off valve for opening and closing this expansion chamber is provided, and the valve stem of the on-off valve is provided with an expansion chamber. A hole is provided that penetrates in the radial direction, and the valve shaft is rotated depending on the operating state of the internal combustion engine to communicate the intake passage and the expansion chamber as desired, and control the volumetric efficiency according to the operating state of the internal combustion engine. Since the internal combustion engine is equipped with a control section, it is possible to eliminate problems in each operating state of the internal combustion engine in the low speed range, medium speed range, and high speed range, and achieve good effects such as improved output and volumetric efficiency in all ranges. It's something you get. Furthermore, since good effects can be achieved in all operating conditions of the internal combustion engine, the riding feeling of, for example, a four-wheeled vehicle can be improved, which is advantageous in practical terms.
第１〜１１図はこの発明の実施例を示し、第１図は内燃
機関の吸気装置の概略拡大断面図、第２図は内燃機関の
吸気装置の概略図、第３図は拡張室部分の概略平面図、
第４図は拡張室部分の概略拡大断面図、第５図は弁軸と
開閉弁との斜視図、第６図は内燃機関の吸気装置の低速
域における開閉弁の開閉状態を示す拡大断面図、第７図
は内燃機関の吸気装置の中速域における開閉弁の開閉状
態を示す拡大断面図、第８図は内燃機関の吸気装置の高
速域における開閉弁の開閉状態を示す拡大断面図、第９
図は内燃機関の吸気装置のブロック図、第１０図はエン
ジン回転数と出力との関係における個々の出力特性を示
す図、第１１図はエンジン回転数と出力との関係を示す
図である。
第１２〜１４図はこの発明の従来技術を示し、第１２図
は内燃機関の吸気装置の概略図、第１３図は吸気弁の概
略拡大断面図、第１４図は吸気マニホルドの概略図であ
る。
図において、２は内燃機関、４はシリンダヘッド、６は
吸気ポート、８は吸気マニホルド、１０は気化器、１２
はエアクリーナ、１４は吸気通路、１６は拡張室、１８
はストッパ部、２０は開閉弁、２２は弁軸、２４は孔部
、２６はワイヤ、２８は制御部、３０はサーボモータ、
３２は吸気弁、３４は排気弁、３６は排気ポートである
。
第２図
第３図
第４図
６
第６図
第７図
４
第８図
第９図
Ｂ
第１０図
エンジン回転数1 to 11 show embodiments of the present invention, FIG. 1 is a schematic enlarged sectional view of an intake system of an internal combustion engine, FIG. 2 is a schematic diagram of an intake system of an internal combustion engine, and FIG. Schematic plan,
Fig. 4 is a schematic enlarged sectional view of the expansion chamber portion, Fig. 5 is a perspective view of the valve shaft and the on-off valve, and Fig. 6 is an enlarged sectional view showing the open/closed state of the on-off valve in the low speed range of the intake system of an internal combustion engine. , FIG. 7 is an enlarged sectional view showing the opening and closing states of the on-off valve in the medium speed range of the intake system of the internal combustion engine, and FIG. 8 is an enlarged sectional view showing the opening and closing states of the on-off valve in the high speed range of the intake system of the internal combustion engine. 9th
FIG. 10 is a block diagram of an intake system of an internal combustion engine, FIG. 10 is a diagram showing individual output characteristics in the relationship between engine speed and output, and FIG. 11 is a diagram showing the relationship between engine speed and output. 12 to 14 show the prior art of the present invention, FIG. 12 is a schematic diagram of an intake system of an internal combustion engine, FIG. 13 is a schematic enlarged sectional view of an intake valve, and FIG. 14 is a schematic diagram of an intake manifold. . In the figure, 2 is an internal combustion engine, 4 is a cylinder head, 6 is an intake port, 8 is an intake manifold, 10 is a carburetor, 12
is an air cleaner, 14 is an intake passage, 16 is an expansion chamber, 18
20 is a stopper part, 20 is an on-off valve, 22 is a valve shaft, 24 is a hole part, 26 is a wire, 28 is a control part, 30 is a servo motor,
32 is an intake valve, 34 is an exhaust valve, and 36 is an exhaust port. Fig. 2 Fig. 3 Fig. 4 Fig. 6 Fig. 6 Fig. 7 Fig. 4 Fig. 8 Fig. 9 B Fig. 10 Engine speed
Claims (1)
して導入する内燃機関の吸気装置において、前記吸気通
路途中に拡張室を設けるとともにこの拡張室を開閉する
開閉弁を設け、開閉弁の弁軸に半径方向に貫通する孔部
を設け、前記内燃機関の運転状態により前記弁軸を回動
させ所望に応じて前記吸気通路と拡張室とを連通すると
ともに前記内燃機関の運転状態に応じた体積効率とすべ
く制御する制御部を設けたことを特徴とする内燃機関の
吸気装置。1. In an intake system for an internal combustion engine that introduces intake air from an air cleaner into an internal combustion engine through an intake passage, an expansion chamber is provided in the middle of the intake passage, and an on-off valve for opening and closing this expansion chamber is provided, and the valve shaft of the on-off valve is provided. is provided with a hole penetrating in the radial direction, and the valve shaft is rotated depending on the operating state of the internal combustion engine to communicate the intake passage and the expansion chamber as desired, and the volume is adjusted according to the operating state of the internal combustion engine. An intake system for an internal combustion engine, characterized in that it is provided with a control section for controlling to improve efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16767189A JPH0333428A (en) | 1989-06-29 | 1989-06-29 | Suction device of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16767189A JPH0333428A (en) | 1989-06-29 | 1989-06-29 | Suction device of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0333428A true JPH0333428A (en) | 1991-02-13 |
Family
ID=15854061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16767189A Pending JPH0333428A (en) | 1989-06-29 | 1989-06-29 | Suction device of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0333428A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7556019B2 (en) | 2006-12-15 | 2009-07-07 | Briggs And Stratton Corporation | Intake manifold regulators for internal combustion engines |
-
1989
- 1989-06-29 JP JP16767189A patent/JPH0333428A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7556019B2 (en) | 2006-12-15 | 2009-07-07 | Briggs And Stratton Corporation | Intake manifold regulators for internal combustion engines |
| US7669572B2 (en) | 2006-12-15 | 2010-03-02 | Briggs And Stratton Corporation | Intake manifold regulators for internal combustion engines |
| US7717078B2 (en) | 2006-12-15 | 2010-05-18 | Briggs And Stratton Corporation | Intake manifold regulators for internal combustion engines |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5138989A (en) | Internal combustion engine with two or more inlet valves per engine cylinder | |
| JPH03264727A (en) | Intake system for multiple valve engine | |
| US5072583A (en) | Exhaust system for internal combustion engines | |
| EP1130235B1 (en) | Control device for an internal combustion engine | |
| JPS6125916A (en) | Intake-air device in engine | |
| US20040107934A1 (en) | Integrated inlet manifold tuning valve and charge motion control device for internal combustion engines | |
| JPH0333428A (en) | Suction device of internal combustion engine | |
| JP2002221036A (en) | Intake system for engine | |
| JPS61108830A (en) | Exhaust turbine type supercharger | |
| JPH065022B2 (en) | Exhaust turbocharged engine | |
| JP3804126B2 (en) | Control device for engine with mechanical supercharger | |
| JPS6053616A (en) | Suction passage device for internal-combustion engine | |
| JPS6125915A (en) | Intake-air device in internal-combustion engine | |
| JPH03141823A (en) | Combustion control device for alcohol diesel engine | |
| JPS6161918A (en) | Air intake device of internal-combustion engine | |
| JPH0634581Y2 (en) | Double intake valve engine | |
| JPH029065Y2 (en) | ||
| JPH08270453A (en) | Intake device for internal combustion engine | |
| JPH051545A (en) | Intake system of internal combustion engine | |
| JPS60219414A (en) | Intake device for engine | |
| JPS60125723A (en) | Intake apparatus for internal combustion engine | |
| JPS61218720A (en) | Intake device of engine with supercharger | |
| JPH0726543B2 (en) | Engine intake system | |
| JPH06248960A (en) | Air intake device for engine | |
| JPS614825A (en) | Exhauster for 2-cycle engine |