JPH079185B2 - Intake device for rotary piston engine - Google Patents

Intake device for rotary piston engine

Info

Publication number
JPH079185B2
JPH079185B2 JP16117086A JP16117086A JPH079185B2 JP H079185 B2 JPH079185 B2 JP H079185B2 JP 16117086 A JP16117086 A JP 16117086A JP 16117086 A JP16117086 A JP 16117086A JP H079185 B2 JPH079185 B2 JP H079185B2
Authority
JP
Japan
Prior art keywords
intake
communication
cylinder
intake port
control valve
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 - Lifetime
Application number
JP16117086A
Other languages
Japanese (ja)
Other versions
JPS6318128A (en
Inventor
晴男 沖本
誠司 田島
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.)
Mazda Motor Corp
Original Assignee
Mazda 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 Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP16117086A priority Critical patent/JPH079185B2/en
Publication of JPS6318128A publication Critical patent/JPS6318128A/en
Publication of JPH079185B2 publication Critical patent/JPH079185B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Characterised By The Charging Evacuation (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、吸気の動的効果を利用して出力の向上を図る
ようにしたロータリピストンエンジンの吸気装置の改良
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an intake device for a rotary piston engine that utilizes the dynamic effect of intake air to improve output.

(従来の技術) 従来、ロータリピストンエンジンの吸気装置として、例
えば特開昭59-70833号公報に開示されるように、2気筒
ロータリピストンエンジンの各気筒の吸気通路をスロッ
トルバルブ下流において連通部で連通し、該連通部及び
その下流の吸気通路によって形成される両気筒の吸気ポ
ート間の連通長さを適切に設定し、一方の気筒の吸気ポ
ート閉口時及び開口時に吸気通路内に発生する閉口時圧
縮波及び開口時圧縮波をそれぞれ上記連通部を介して他
方の気筒の全閉直前の吸気ポートに伝播させて気筒間の
吸気干渉による動的効果を得ることにより過給を行うよ
うにしたものが知られている。
(Prior Art) Conventionally, as an intake device of a rotary piston engine, for example, as disclosed in Japanese Patent Laid-Open No. 59-70833, the intake passage of each cylinder of a two-cylinder rotary piston engine is provided with a communicating portion downstream of a throttle valve. A communication port, in which the communication length between the intake ports of both cylinders formed by the communication part and the intake passage downstream thereof is appropriately set, and the closing port generated in the intake passage when the intake port of one cylinder is closed or opened. The supercharging is performed by propagating the time compression wave and the opening compression wave to the intake port of the other cylinder immediately before fully closed through the above communicating portions to obtain a dynamic effect due to intake interference between the cylinders. Things are known.

(発明が解決しようとする問題点) ところが、上記従来のものでは、上記連通部及びその下
流の吸気通路によって形成される両気筒の吸気ポート間
の連通長さが一定であるので、動的効果がこの連通長さ
に応じた特定の回転域でしか得られない。
(Problems to be Solved by the Invention) However, in the above-mentioned conventional one, since the communication length between the intake ports of both cylinders formed by the communication part and the intake passage downstream thereof is constant, the dynamic effect is obtained. Can only be obtained in a specific rotation range according to this communication length.

そこで、上記各吸気通路をスロットルバルブ上流で集合
するとともにスロットルバルブ下流において連通部で連
通し且つ該連通部にエンジンの高回転時に開く制御弁を
設け、エンジンの低回転時には上記制御弁を閉じて両気
筒の吸気ポート間の連通長さを上記集合部及びその下流
の吸気通路によって形成される長いものにする一方、エ
ンジンの高回転時には上記制御弁を開いて両気筒の吸気
ポート間の連通長さを上記連通部及びその下流の吸気通
路によって形成される短いものにすることにより、エン
ジンの全回転域で動的効果を有効に得るようにすること
が考えられる。
Therefore, a control valve that collects the intake passages upstream of the throttle valve and communicates with the communication portion downstream of the throttle valve and that opens at high engine speed is provided at the communication portion, and the control valve is closed at low engine speed. The communication length between the intake ports of both cylinders is made long by the collecting portion and the intake passages downstream thereof, while the control valve is opened at high engine speed to open the communication length between the intake ports of both cylinders. It is conceivable that the dynamic effect can be effectively obtained in the entire rotation range of the engine by making the length short by the communication portion and the intake passage downstream thereof.

しかし、この場合、エンジンのトルク特性は、制御弁閉
作動時に得られるエンジン低回転域でピークを形成する
特性曲線と、制御弁開作動時に得られるエンジン高回転
域でピークを形成する特性曲線とをつなぎ合わせたもの
になるので、低回転域と高回転域との中間の回転域でト
ルクの谷が形成されるという問題を有している。
However, in this case, the torque characteristics of the engine include a characteristic curve that forms a peak in the low engine speed range obtained when the control valve is closed and a characteristic curve that forms a peak in the high engine speed range that is obtained when the control valve is opened. Therefore, there is a problem that a trough of torque is formed in the rotation range intermediate between the low rotation range and the high rotation range.

ところで、ロータリピストンエンジンの高回転域におけ
るエンジン出力の向上を図る吸気装置として、例えば実
開昭59-165530号公報に開示されるように、サイドハウ
ジングに主吸気ポートを開口するとともに、該主吸気ポ
ートよりもリーディング側に該主吸気ポートよりも遅れ
て閉じる補助吸気ポートを開口し且つ該補助吸気ポート
に該補助吸気ポートを開閉する補助吸気ポート弁を設
け、エンジンの高回転時に該補助吸気ポート弁を開いて
吸気行程の終期を遅らせることにより作動室に供給する
新気の量を増して充填効率を向上させる一方、エンジン
の低回転時に補助吸気ポート弁を閉じてポンピングロス
を低減させるようにしたものが知られている。
By the way, as an intake device for improving the engine output in a high rotation range of a rotary piston engine, for example, as disclosed in Japanese Utility Model Laid-Open No. 59-165530, a main intake port is opened in a side housing and the main intake port is opened. An auxiliary intake port valve for opening the auxiliary intake port which is closed later than the main intake port on the leading side of the port and for opening and closing the auxiliary intake port is provided at the auxiliary intake port, and the auxiliary intake port is provided at a high engine speed. By opening the valve and delaying the end of the intake stroke, the amount of fresh air supplied to the working chamber is increased to improve the charging efficiency, while the auxiliary intake port valve is closed to reduce pumping loss when the engine speed is low. What you have done is known.

本発明はかかる点に鑑みてなされたものであり、その目
的とするところは、エンジンの中間回転域で補助吸気ポ
ートを利用して吸気行程の終期を遅らせることにより、
吸気ポートの連通長さが長い状態で得られた圧縮波を効
率良く気筒に取り入れてトルク特性におけるトルクの谷
を埋めることにある。
The present invention has been made in view of the above point, and its object is to delay the end of the intake stroke by utilizing the auxiliary intake port in the intermediate rotation range of the engine.
The purpose is to efficiently take the compression wave obtained in the state where the communication length of the intake port is long into the cylinder to fill the valley of the torque in the torque characteristic.

(問題点を解決するための手段) 上記目的を達成するため、本発明の解決手段は、気筒群
間の圧力伝播により動的効果を得るよう気筒群間の吸気
通路を通過する第1連通部と、該第1連通部による連通
長さよりも短い連通長さで上記気筒群間の吸気通路を連
通する第2連通部と、該第2連通部を開閉する制御弁
と、各気筒に設けられ主吸気ポートよりも遅れて閉じる
補助吸気ポートと、該各補助吸気ポート内の吸気の流れ
を制御する補助吸気ポート弁と、エンジンの高回転域に
おいて、所定回転数以上のときに上記制御弁を開き、少
なくとも制御弁が閉じているときに上記補助吸気ポート
弁を開くよう制御する制御装置とを備える構成としたも
のである。
(Means for Solving the Problems) In order to achieve the above-mentioned object, the solution means of the present invention is a first communicating portion that passes through an intake passage between cylinder groups so as to obtain a dynamic effect by pressure propagation between the cylinder groups. A second communication portion that communicates the intake passage between the cylinder groups with a communication length shorter than the communication length of the first communication portion; a control valve that opens and closes the second communication portion; Auxiliary intake ports that are closed later than the main intake port, auxiliary intake port valves that control the flow of intake air in each of the auxiliary intake ports, and the above-mentioned control valve when the engine speed is higher than a predetermined speed in the high engine speed range. A control device that opens and at least controls the auxiliary intake port valve to open when the control valve is closed.

(作用) 上記構成により、本発明では、エンジン低回転時、上記
制御弁が閉じて両気筒群の連通長さが第1連通部及びそ
の下流の吸気通路で形成される長いものになり、エンジ
ン回転数にマッチングする低周波の動的効果が良好に得
られる。
(Operation) With the above configuration, in the present invention, when the engine is running at low speed, the control valve is closed so that the communication length between the two cylinder groups is long formed by the first communication portion and the intake passage downstream thereof. Good low frequency dynamic effects matching the rotational speed are obtained.

一方、エンジン高回転域において所定回転数以上のと
き、上記制御弁が開いて両気筒群の連通長さが第2連通
路及びその下流の吸気通路で形成される短いものにな
り、エンジン回転数にマッチングする高周波の動的効果
が良好に得られる。
On the other hand, when the engine speed is equal to or higher than the predetermined speed in the high engine speed range, the control valve is opened so that the communication length between the two cylinder groups becomes a short one formed by the second communication passage and the intake passage downstream thereof. The dynamic effect of high frequency matching with is satisfactorily obtained.

また、エンジンの高回転高負荷時には、上記補助吸気ポ
ート弁が開いて吸気行程の終期が遅くなるので、新気の
充填効率が向上し、エンジン出力が確保される。
Further, at the time of high engine speed and high load, since the auxiliary intake port valve is opened and the end of the intake stroke is delayed, the charging efficiency of fresh air is improved and the engine output is secured.

さらに、エンジン高回転域において上記制御弁が閉じて
いるとき(上記所定回転数以下のとき)には上記長い方
の連通長さに応じた周波数よりも高い周波数の圧縮波が
発生するが、上記補助吸気ポート弁が開いて吸気行程の
終期が遅くなるので、遅れて吸気ポートに伝播する圧縮
波が気筒に取り入れられて充填効率が高まり、トルク特
性におけるトルクの谷が埋められる。
Further, when the control valve is closed in the high engine speed region (when the speed is equal to or lower than the predetermined speed), a compression wave having a frequency higher than the frequency corresponding to the longer communication length is generated. Since the auxiliary intake port valve is opened and the end of the intake stroke is delayed, the compression wave that propagates to the intake port with a delay is taken into the cylinder, the filling efficiency is increased, and the valley of the torque in the torque characteristic is filled.

(実施例) 以下、本発明の実施例を図面に基づいて説明する。(Example) Hereinafter, the Example of this invention is described based on drawing.

第1図ないし第3図は本発明を2気筒ロータリピストン
エンジンに適用した場合の実施例を示す。このエンジン
は、中央に配置されたインタメディエイトハウジング1
と、該インタメディエイトハウジング1の両側に配置さ
れトロコイド状内周面を有するフロント及びリヤのロー
タハウジング2a,2bと、該各ロータハウジング2a,2bの前
後に配置されたフロント及びリヤのサイドハウジング3
a,3bとを備え、これらのハウジングによってその内方に
2つの気筒C,Cが形成されている。該各気筒C内にはそ
れぞれ多角形状のロータ4が配置され、該各ロータ4は
エキセントリックシャフト5に支承されていて、該各ロ
ータ4が遊星回転運動することによって、各気筒C内に
区画形成される3つの作動室6,6,6に吸気、圧縮、爆
発、膨張及び排気の各行程を順に行わせるものである。
1 to 3 show an embodiment in which the present invention is applied to a two-cylinder rotary piston engine. This engine has a centrally located intermediate housing 1
And front and rear rotor housings 2a, 2b arranged on both sides of the intermediate housing 1 and having trochoidal inner peripheral surfaces, and front and rear side housings arranged before and after each rotor housing 2a, 2b. 3
a and 3b, and two cylinders C, C are formed inside thereof by these housings. A polygonal rotor 4 is arranged in each cylinder C, each rotor 4 is supported by an eccentric shaft 5, and each rotor 4 makes a planetary rotational motion to form a partition in each cylinder C. The three working chambers 6, 6, 6 to be operated are made to sequentially perform the intake, compression, explosion, expansion and exhaust strokes.

また、上記インタメディエイトハウジング1には、全運
転域で上記各気筒Cの作動室6に新気を供給するプライ
マリポート(主吸気ポート)7,7が開口している。さら
に、上記各サイドハウジング3a,3bの上記プライマリポ
ート7よりもロータ回転方向リーディング側には、エン
ジンの高負荷時にのみ各気筒Cの作動室6に新気を供給
するセカンダリーメインポート(主吸気ポート)8が開
口し、また、該各セカンダリーメインポート8よりもロ
ータ回転方向リーディング側には、エンジンの高回転高
負荷時、上記セカンダリーメインポート8よりも遅れて
閉じて各気筒Cの作動室6に新気を供給するセカンダリ
ー補助ポート(補助吸気ポート)9が開口している。
Further, in the intermediate housing 1, primary ports (main intake ports) 7 and 7 for supplying fresh air to the working chambers 6 of the respective cylinders C are opened in all operating regions. Further, a secondary main port (main intake port) that supplies fresh air to the working chamber 6 of each cylinder C only when the engine is under a high load is provided on the leading side in the rotor rotation direction of the side housings 3a, 3b rather than the primary port 7. ) 8 is open, and on the leading side of each secondary main port 8 in the rotor rotation direction, when the engine is running at high rotation and high load, it is closed later than the secondary main port 8 to close the working chamber 6 of each cylinder C. A secondary auxiliary port (auxiliary intake port) 9 for supplying fresh air to the is opened.

さらに、上記各プライマリポート7には1次吸気通路10
が接続され、各気筒Cの1次吸気通路10,10はその上流
側でエアクリーナ11に接続されている。また、上記各セ
カンダリーメインポート8及びセカンダリー補助ポート
9には2次吸気通路12が接続され、各気筒Cの2次吸気
通路12,12はその上流端でエアクリーナ11に接続されて
いる。該2次吸気通路12の下流端には、該2次給気通路
12のセカンダリー補助ポート9への連通を開閉する補助
給気ポート弁14が設けられ、該補助吸気ポート弁14は吸
気負圧を作動源とするダイヤフラム式のアクチュエータ
15により駆動され、該アクチュエータ15は制御装置とし
てのコントローラ16によって制御される。
Further, each of the above primary ports 7 has a primary intake passage 10
Are connected, and the primary intake passages 10, 10 of each cylinder C are connected to the air cleaner 11 on the upstream side thereof. A secondary intake passage 12 is connected to each of the secondary main port 8 and the secondary auxiliary port 9, and the secondary intake passages 12, 12 of each cylinder C are connected to the air cleaner 11 at their upstream ends. The secondary air supply passage is provided at the downstream end of the secondary intake passage 12.
An auxiliary air supply port valve 14 that opens and closes the communication of the 12 with the secondary auxiliary port 9 is provided, and the auxiliary intake port valve 14 is a diaphragm actuator that uses intake negative pressure as an operation source.
It is driven by 15, and the actuator 15 is controlled by a controller 16 as a control device.

また、上記1次吸気通路10,10及び2次吸気通路12,12に
は、気筒間の圧力伝播により低周波の動的効果を得るよ
う気筒間の1次吸気通路10,10及び2次吸気通路12,12を
それぞれ連通する1次吸気通路用の第1連通部17a及び
2次吸気通路用の第1連通部18aが設けられている。さ
らに、該各第1連通部下流の1次給気通路10,10及び2
次給気通路12,12には、気筒間の圧力伝播により高周波
の動的効果を得るよう各第1連通部17a,18aによる連通
長さよりも短い連通長さで気筒間の1次吸気通路10,10
及び2次吸気通路12,12をそれぞれ連通する1次吸気通
路用の第2連通部17b及び2次吸気通路用の第2連通部1
8bが設けられている。
Further, the primary intake passages 10, 10 and the secondary intake passages 12, 12 are provided in the primary intake passages 10, 10 and the secondary intake passages between the cylinders so as to obtain a low frequency dynamic effect due to pressure propagation between the cylinders. A first communication portion 17a for the primary intake passage and a first communication portion 18a for the secondary intake passage are provided which communicate with the passages 12, 12, respectively. Further, the primary air supply passages 10, 10 and 2 downstream of the respective first communication parts
In the secondary air supply passages 12, 12, the primary intake air passages 10 between the cylinders are communicated with a communication length shorter than that of the first communication portions 17a, 18a so as to obtain a high frequency dynamic effect due to pressure propagation between the cylinders. ,Ten
The second communication part 17b for the primary intake passage and the second communication part 1 for the secondary intake passage which communicate the second and second intake passages 12, 12 respectively.
8b is provided.

そして、上記1次吸気通路用の第2連通部17bには該第
2連通部17bを開閉する1次制御弁21が設けられ、2次
吸気通路用の第2連通部18bには該第2連通部18bを開閉
する2次制御弁22が設けられている。第1次制御弁21及
び2次制御弁22は共に円筒形ロータリバルブよりなり、
吸気負圧を作動源とするダイヤフラム式のアクチュエー
タ24により連動して駆動される。該各アクチュエータ24
は上記コントローラ16により制御される。該コントロー
ラ16には、エアフローセンサ28の信号及びエンジン回転
数信号が入力されている。尚、25は各吸気通路10,12に
配設され上記コントローラ16により制御されるインジェ
クタ、26は各ロータハウジング2a,2bに配設された点火
プラグ、27a〜27cはスロットル弁である。
The second communication part 17b for the primary intake passage is provided with a primary control valve 21 for opening and closing the second communication part 17b, and the second communication part 18b for the secondary intake passage is provided with the second communication part 18b. A secondary control valve 22 that opens and closes the communication portion 18b is provided. The primary control valve 21 and the secondary control valve 22 are both cylindrical rotary valves,
It is driven in conjunction with a diaphragm-type actuator 24 which uses intake negative pressure as an operation source. Each actuator 24
Is controlled by the controller 16. A signal from the air flow sensor 28 and an engine speed signal are input to the controller 16. In addition, 25 is an injector provided in each intake passage 10 and 12 and controlled by the controller 16, 26 is an ignition plug provided in each rotor housing 2a, 2b, and 27a to 27c are throttle valves.

次に、上記コントローラ16の作動を第4図〜第6図に基
づいて説明するに、第4図の破線よりも左側の領域で示
すエンジン低回転時、上記1次制御弁21及び2次制御弁
22が閉じて、両気筒C,Cのプライマリポート間の連通長
さが第1連通部17a及びその下流の1次給気通路10で形
成される長いものになるとともに両気筒C,Cのセカンダ
リーメインポート間の連通長さが第1連通部18a及びそ
の下流の2次給気通路12で形成される長いものになるの
で、第5図の実線で示すようなエンジン回転数にマッチ
ングする低周波の動的効果を良好に得ることができる。
Next, the operation of the controller 16 will be described with reference to FIGS. 4 to 6. The primary control valve 21 and the secondary control are performed when the engine is running at low engine speed shown in the region on the left side of the broken line in FIG. valve
22 is closed, the communication length between the primary ports of both cylinders C, C becomes a long one formed by the first communication part 17a and the primary air supply passage 10 downstream thereof, and the secondary length of both cylinders C, C is increased. Since the communication length between the main ports is the long one formed by the first communication portion 18a and the secondary air supply passage 12 downstream thereof, the low frequency matching the engine speed as shown by the solid line in FIG. The dynamic effect of can be satisfactorily obtained.

一方、第4図の破線よりも右側の領域つまりエンジン高
回転域において所定回転数以上のとき、上記1次制御弁
21及び2次制御弁22が開いて、両気筒C,Cのプライマリ
ポート間の連通長さが第2連通部17b及びその下流の1
次吸気通路10で形成される短いものになるとともに両気
筒C,Cのセカンダリーメインポート間の連通長さが第2
連通部18b及びその下流の2次吸気通路12で形成される
短いものになるので、第5図の一点鎖線で示すようなエ
ンジン回転数にマッチングする高周波の動的効果を良好
に得ることができる。しかも、この運転領域では、上記
補助吸気ポート弁14が開いて第6図に実線で示すように
吸気行程の終期が遅くなるので、新気の充填効率が向上
し、エンジン出力を確保することができる。
On the other hand, in the region on the right side of the broken line in FIG. 4, that is, in the high engine speed region, when the number of revolutions is equal to or higher than a predetermined value, the primary control valve
21 and the secondary control valve 22 are opened so that the communication length between the primary ports of both cylinders C, C is the second communication portion 17b and the downstream side thereof is 1
It becomes a short one formed by the secondary intake passage 10, and the communication length between the secondary main ports of both cylinders C, C is the second.
Since it becomes a short one formed by the communication part 18b and the secondary intake passage 12 downstream thereof, a high frequency dynamic effect matching the engine speed as shown by the one-dot chain line in FIG. 5 can be satisfactorily obtained. . Moreover, in this operating region, the auxiliary intake port valve 14 is opened and the end of the intake stroke is delayed as shown by the solid line in FIG. 6, so that the efficiency of charging fresh air is improved and the engine output can be secured. it can.

さらに、第4図に斜線で示すようにエンジンの高回転域
において1次制御弁21及び2次制御弁22が閉じていると
き(上記所定回転数以下のとき)、上記補助吸気ポート
弁14が開いて、吸気行程の終期が遅くなる。このことに
より、上記長い方の連通長さに応じた周波数よりも高い
周波数で発生し主吸気ポート7,8に遅れて伝播する圧縮
波が効率良く気筒Cに取り入れられるとともに、第6図
に示すように補助吸気ポート弁14の開作動により圧縮波
の伝播に要する時間がt1からt2(t2>t1)に変化してエ
ンジン回転数の上昇につれて圧縮波の伝播のタイミング
がエンジン回転数によくマッチングするようになり、第
5図の点線で示すように充填効率が高まり、トルク特性
におけるトルクの谷を埋めることができる。
Further, when the primary control valve 21 and the secondary control valve 22 are closed in the high engine speed region as indicated by the hatched lines in FIG. 4 (when the engine speed is below the predetermined speed), the auxiliary intake port valve 14 is Open and the end of the intake stroke is delayed. As a result, the compression wave generated at a frequency higher than the frequency corresponding to the longer communication length and propagating with a delay to the main intake ports 7 and 8 is efficiently taken into the cylinder C, and shown in FIG. As described above, the time required for the propagation of the compression wave changes from t 1 to t 2 (t 2 > t 1 ) due to the opening operation of the auxiliary intake port valve 14, and the timing of the propagation of the compression wave changes as the engine speed increases. The number is well matched, the filling efficiency is improved as shown by the dotted line in FIG. 5, and the valley of the torque in the torque characteristic can be filled.

また、第4図に示すように、エンジン低負荷時には、リ
ヤ側気筒Cのインジェクタ25への燃料供給がカットされ
てフロント側気筒のみを稼働する減筒運転が行われ、フ
ロント側気筒の燃焼性が高められて燃費の向上等を図る
ことができる。さらに、エンジン極低負荷時には、両気
筒C,Cのインジェクタ25への燃料供給がカットされる。
Further, as shown in FIG. 4, when the engine load is low, the fuel supply to the injector 25 of the rear cylinder C is cut off, and the reduced cylinder operation is performed in which only the front cylinder is operated. It is possible to improve fuel efficiency by increasing the fuel consumption. Further, when the engine load is extremely low, the fuel supply to the injectors 25 of both cylinders C, C is cut off.

(発明の効果) 以上説明したように、本発明のロータリピストンエンジ
ンの吸気装置によれば、気筒群間の吸気通路の連通長さ
をエンジン回転数に応じて切換えるとともに、エンジン
の高回転域において少なくとも上記連通長さが長いとき
には主吸気ポートよりも遅れて閉じる補助吸気ポートを
開き、遅れて吸気ポートに伝播する圧縮波を効率良く気
筒に取り入れるようにしたので、トルク特性におけるト
ルクの谷を埋めてエンジンの全回転域で圧力伝播により
動的効果を良好に得て効果的にエンジン出力の向上を図
ることができる。
(Effects of the Invention) As described above, according to the intake device for a rotary piston engine of the present invention, the communication length of the intake passage between the cylinder groups is switched according to the engine speed, and in the high engine speed range. At least when the communication length is long, the auxiliary intake port, which is closed later than the main intake port, is opened, and the compression wave propagating to the intake port later is efficiently introduced into the cylinder, so the torque valley in the torque characteristic is filled. As a result, the dynamic effect is satisfactorily obtained by the pressure propagation in the entire engine rotation range, and the engine output can be effectively improved.

【図面の簡単な説明】[Brief description of drawings]

図面は本発明の実施例を示し、第1図は全体概略構成
図、第2図はエンジンの側面図、第3図はエンジンの平
面図、第4図は補助吸気ポート弁及び制御弁の作動を示
す説明図、第5図はトルク特性を示す図、第6図は気筒
間の圧縮波の伝播を示す説明図である。 7……プライマリポート、8……セカンダリーメインポ
ート、9……セカンダリー補助ポート、10……1次吸気
通路、12……2次吸気通路、14……補助吸気ポート弁、
17a,18a……第1連通部、17b,18b……第2連通部、21…
…1次制御弁、22……2次制御弁、C……気筒。
The drawings show an embodiment of the present invention, FIG. 1 is an overall schematic configuration diagram, FIG. 2 is a side view of the engine, FIG. 3 is a plan view of the engine, and FIG. 4 is operation of auxiliary intake port valves and control valves. Fig. 5 is a diagram showing torque characteristics, and Fig. 6 is an explanatory diagram showing propagation of a compression wave between cylinders. 7 ... Primary port, 8 ... Secondary main port, 9 ... Secondary auxiliary port, 10 ... Primary intake passage, 12 ... Secondary intake passage, 14 ... Auxiliary intake port valve,
17a, 18a ... first communication part, 17b, 18b ... second communication part, 21 ...
… Primary control valve, 22 …… Secondary control valve, C …… Cylinder.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】気筒群間の圧力伝播により動的効果を得る
よう気筒群間の吸気通路を連通する第1連通部と、該第
1連通部による連通長さよりも短い連通長さで上記気筒
群間の吸気通路を連通する第2連通部と、該第2連通部
を開閉する制御弁と、各気筒に設けられ主吸気ポートよ
りも遅れて閉じる補助吸気ポートと、該各補助吸気ポー
ト内の吸気の流れを制御する補助吸気ポート弁と、エン
ジンの高回転域において、所定回転数以上のときに上記
制御弁を開き、少なくとも制御弁が閉じているときに上
記補助吸気ポート弁を開くよう制御する制御装置とを備
えたことを特徴とするロータリピストンエンジンの吸気
装置。
Claim: What is claimed is: 1. A cylinder having a first communication part communicating with an intake passage between the cylinder groups so as to obtain a dynamic effect by pressure propagation between the cylinder groups, and a communication length shorter than a communication length by the first communication part. A second communication portion that communicates an intake passage between the groups, a control valve that opens and closes the second communication portion, an auxiliary intake port that is provided in each cylinder and that is closed later than the main intake port, and inside each auxiliary intake port. And an auxiliary intake port valve for controlling the flow of intake air of the engine, and in a high engine speed range, the control valve is opened at a predetermined speed or more, and the auxiliary intake port valve is opened at least when the control valve is closed. An intake device for a rotary piston engine, comprising: a control device for controlling.
JP16117086A 1986-07-09 1986-07-09 Intake device for rotary piston engine Expired - Lifetime JPH079185B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16117086A JPH079185B2 (en) 1986-07-09 1986-07-09 Intake device for rotary piston engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16117086A JPH079185B2 (en) 1986-07-09 1986-07-09 Intake device for rotary piston engine

Publications (2)

Publication Number Publication Date
JPS6318128A JPS6318128A (en) 1988-01-26
JPH079185B2 true JPH079185B2 (en) 1995-02-01

Family

ID=15729921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16117086A Expired - Lifetime JPH079185B2 (en) 1986-07-09 1986-07-09 Intake device for rotary piston engine

Country Status (1)

Country Link
JP (1) JPH079185B2 (en)

Also Published As

Publication number Publication date
JPS6318128A (en) 1988-01-26

Similar Documents

Publication Publication Date Title
US4932378A (en) Intake system for internal combustion engines
US4630446A (en) Outboard motor with turbo-charger
US4756284A (en) Intake system for internal combustion engine
JPS63179134A (en) Suction device for engine
JPH0726553B2 (en) Engine intake system
JPH079185B2 (en) Intake device for rotary piston engine
JPH079184B2 (en) Engine intake system
JPS6229617B2 (en)
JPH0341056Y2 (en)
JP2517584B2 (en) Engine mechanical supercharger
JPH079186B2 (en) Engine intake system
JPH079182B2 (en) Engine intake system
US4750458A (en) Intake system for rotary piston engine
JPS63179132A (en) Rotary piston engine with pumping loss reducing device
JPH0340214B2 (en)
JPS6069235A (en) Diesel engine with supercharger
JPH0568612B2 (en)
JPH079183B2 (en) Engine intake system
JPH086600B2 (en) Engine intake system
JPS6355324A (en) Intake device of two-cylinder rotary piston engine
JPS63179133A (en) 3-cylinder rotary piston engine with pumping loss reducing device
JPS63179135A (en) Suction device for engine
JPS6090924A (en) Internal-combustion engine with supercharger
JPS62248823A (en) Intake device for engine
JPS6316126A (en) Intake device for engine