JPS61192822A - Variable cylinder number type internal-combustion engine equipped with supercharger - Google Patents
Variable cylinder number type internal-combustion engine equipped with superchargerInfo
- Publication number
- JPS61192822A JPS61192822A JP3140385A JP3140385A JPS61192822A JP S61192822 A JPS61192822 A JP S61192822A JP 3140385 A JP3140385 A JP 3140385A JP 3140385 A JP3140385 A JP 3140385A JP S61192822 A JPS61192822 A JP S61192822A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder group
- cylinder
- supercharger
- intake manifold
- gate 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
- F02D17/02—Cutting-out
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本考案は、運転状態に応じて一部の気筒群の稼動を、休
止していわゆる部分気筒運転を行ない、かつ、過給機を
備えた可変気筒式内燃機関に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a system that suspends the operation of some cylinder groups depending on the operating state to perform so-called partial cylinder operation, and that is equipped with a supercharger. It relates to a variable cylinder internal combustion engine.
スロットル弁によりエンジン負荷を制御するよう構成さ
れた内燃機関においては、スロットル弁の開度が小さく
なるに従って燃料消費率が悪化する。この燃料消費率を
向上させるために、例えばエンジン負荷が低い時、一部
の気筒群の運転を休止させると共に残りの気筒群に高負
荷運転を行なわせるようにした可変気筒式内燃機関が知
られている。一方、エンジン出力を向上させるために機
械式過給機を可変気筒式内燃機関に設けることも知られ
ている。In an internal combustion engine configured to control engine load with a throttle valve, the fuel consumption rate worsens as the opening degree of the throttle valve decreases. In order to improve this fuel consumption rate, variable cylinder internal combustion engines are known that, for example, when the engine load is low, the operation of some cylinder groups is suspended and the remaining cylinder groups are operated at high load. ing. On the other hand, it is also known to provide a mechanical supercharger to a variable cylinder internal combustion engine in order to improve engine output.
機械式過給機はターボチャージャに比べて低回転域から
効率良く過給作用を果たすことができるが、極低回転域
においては、シール部からの洩れ等により過給圧が充分
上昇せず、応答性の向上にはまだ限界がある。すなわち
、機械式過給機を用いても、極低回転域においては所望
の過給圧を得ることができないという問題点がある。本
発明は、可変気筒式内燃機関においてこのような問題点
を解決することを目的とする。Compared to turbochargers, mechanical superchargers can perform supercharging effects more efficiently from low speed ranges, but in extremely low speed ranges, the supercharging pressure does not increase sufficiently due to leaks from seals, etc. There are still limits to improving responsiveness. That is, even if a mechanical supercharger is used, there is a problem in that a desired supercharging pressure cannot be obtained in an extremely low rotation range. The present invention aims to solve these problems in a variable cylinder internal combustion engine.
Ｃ問題点を解決するための手段〕
本発明に係る可変気筒式内燃機関は、常時稼動する第１
気筒群と、運転状態に応じて休止する第２気筒群と、こ
れら第１および第２気筒群の各気筒に連通ずるインテー
クマニホールドと、このインテークマニホールド内を第
１気筒群側と第２気筒群側とに区画可能な仕切弁と、イ
ンテークマニホールドの第１気筒群側に連通ずる第１吸
気通路に設けられた第１スーパーチャージャと、インチ
ークマニホールドの第２気筒群側に連通ずる第２吸気通
路に設けられた第２スーパーチャージャとを備える。機
関回転数の上昇とともに過給圧が上昇する極低回転時、
第２気筒群の運転を休止し、第１および第２スーパーチ
ャージャが駆動され、かつ仕切弁がインテークマニホー
ルドの第１気筒群側と第２気筒群側とを連通させる。Means for Solving Problem C] The variable cylinder internal combustion engine according to the present invention has a first cylinder which is always in operation.
a cylinder group, a second cylinder group that is deactivated depending on the operating state, an intake manifold that communicates with each cylinder of these first and second cylinder groups, and a cylinder group that connects the first cylinder group side and the second cylinder group inside this intake manifold. a first supercharger provided in a first intake passage communicating with the first cylinder group side of the intake manifold; and a second intake air communicating with the second cylinder group side of the intake manifold. and a second supercharger provided in the passage. At extremely low speeds, where the boost pressure increases as the engine speed increases,
The operation of the second cylinder group is stopped, the first and second superchargers are driven, and the gate valve communicates the first cylinder group side and the second cylinder group side of the intake manifold.
以下図示実施例により本発明を説明する。 The present invention will be explained below with reference to illustrated embodiments.
第１図は本発明の第１実施例を示す。気筒１゜２、 ３
． ４． ５． ６は常時稼動する第１気筒群Ａと機関
出力が低負荷の時稼動を休止する第２気筒群Ｂとに分割
される。吸気通路２０は途中で第１および第２吸気通路
２１．２２に分岐され、第１吸気通路２１には第１スー
パーチャージャ２３が、第２吸気通路２２には第２スー
パーチャージャ２４がそれぞれ設けられる。第１および
第２吸気通路２１．２２はインテークマニホールド２５
に連通ずる。このインテークマニホールド２５には、各
気筒１，２．３．４．５．６にそれぞれ接続する６本の
分岐管１１．１２．１３．１４．１５．１６が形成され
、また中央部にはこのインテークマニホールド２５を第
１気筒群Ａ側と第２気筒群Ｂ側とに区画可能な仕切弁２
６が設けられる。しかして第１副通路２１はインテーク
マニホールド２５の第１気筒群Ａ側に連通し、第２副通
路２２は第２気筒群Ｂ側に連通ずる。FIG. 1 shows a first embodiment of the invention. Cylinder 1゜2, 3
．． 4. 5. 6 is divided into a first cylinder group A that is always in operation and a second cylinder group B that stops operating when the engine output is low load. The intake passage 20 is branched into first and second intake passages 21 and 22 in the middle, and the first intake passage 21 is provided with a first supercharger 23 and the second intake passage 22 is provided with a second supercharger 24. . The first and second intake passages 21 and 22 are connected to the intake manifold 25.
It will be communicated to. This intake manifold 25 has six branch pipes 11.12.13.14.15.16 connected to each cylinder 1, 2.3.4.5.6, respectively. Gate valve 2 that can divide the intake manifold 25 into a first cylinder group A side and a second cylinder group B side
6 is provided. Thus, the first auxiliary passage 21 communicates with the first cylinder group A side of the intake manifold 25, and the second auxiliary passage 22 communicates with the second cylinder group B side.
吸気通路２０の入口部分にはエアクリーナ３３が設けら
れ、このエアクリーナ３３と第１および第２副通路２１
．２２の分岐部分との間には、吸入空気量を計測するエ
アフローメータ３４と、空気量を調節するためのスロッ
トル弁３５とが配設される。また図示しないディストリ
ビュータには回転数検知器３６が設けられる。An air cleaner 33 is provided at the entrance of the intake passage 20, and the air cleaner 33 and the first and second sub passages 21
．． An air flow meter 34 for measuring the amount of intake air and a throttle valve 35 for adjusting the amount of air are disposed between the branch part 22 and the intake air amount. Further, a rotation speed detector 36 is provided in the distributor (not shown).
第１スーパーチャージャ２３は、マイクロコンピュータ
を備えた電子制御部（ＥＣＵ）３０が電磁クラッチ３１
を接続することにより駆動され、また第２スーパーチャ
ージャ２４は、第１スーパーチャージャ２３の運転時に
ＥＣＵ３Ｏが電磁クラッチ３２を接続することにより駆
動される。In the first supercharger 23, an electronic control unit (ECU) 30 equipped with a microcomputer is connected to an electromagnetic clutch 31.
The second supercharger 24 is driven by the ECU 3O connecting the electromagnetic clutch 32 when the first supercharger 23 is operating.
ＥＣＵ３０は、エアフローメータ３４から吸入空気量を
示す信号、回転数検知器３６からエンジン回転数を示す
信号をそれぞれ入力され、これらの信号に基いて、第２
気筒群Ｂの吸排気弁を停止させて部分気筒運転を行なわ
せ、また電磁クラッチ３１．３２の０Ｎ−ＯＦＦを制御
する。The ECU 30 receives a signal indicating the intake air amount from the air flow meter 34 and a signal indicating the engine rotation speed from the rotation speed detector 36, and based on these signals, the second
The intake and exhaust valves of the cylinder group B are stopped to perform partial cylinder operation, and the ON-OFF state of the electromagnetic clutches 31 and 32 is controlled.
本実施例装置は次のように作動する。The device of this embodiment operates as follows.
機関が作動を開始し、極低回転域で運転されている時、
第２気筒群Ｂは休止し、第１気筒群Ａのみが稼動してい
る。この状態において、第２図の（１）に示されるよう
に、第１および第２スーパーチャージャ２３．２４が共
に駆動され、一方仕切弁２６は開放してインテークマニ
ホールド２５の第１気筒群側と第２気筒群側とを連通さ
せている。When the engine starts operating and is operating in an extremely low rotation range,
The second cylinder group B is inactive, and only the first cylinder group A is in operation. In this state, as shown in FIG. 2 (1), both the first and second superchargers 23 and 24 are driven, while the gate valve 26 is opened and connected to the first cylinder group side of the intake manifold 25. It communicates with the second cylinder group side.
したがって、第１気筒群Ａの各気筒１，２．３に供給さ
れる空気は両スーパーチャージャ２３．２４を介して過
給され、スーパーチャージャが１個の場合に比べ、吸入
空気圧は迅速に上昇する。以上の状態は、回転数の上昇
に伴ない過給圧も上昇するような回転数域の状態である
。さらに回転数が高くなって過給圧が所定値まで上昇す
ると、第２図の（２）に示されるように、電磁クラッチ
３２が遮断されて第２スーパーチャージャ２４の作動が
休止するとともに、仕切弁２６がインテークマニホール
ド２５内を閉塞する。したがって第１気筒群Ａには、第
１スーパーチャージャ２３のみから高圧空気が供給され
るようになる。Therefore, the air supplied to each cylinder 1, 2.3 of the first cylinder group A is supercharged via both superchargers 23, 24, and the intake air pressure increases more quickly than in the case of one supercharger. do. The above state is a state in a rotational speed range in which the supercharging pressure also increases as the rotational speed increases. When the rotational speed further increases and the supercharging pressure rises to a predetermined value, the electromagnetic clutch 32 is disconnected, the operation of the second supercharger 24 is stopped, and the partition A valve 26 closes the inside of the intake manifold 25. Therefore, high pressure air is supplied to the first cylinder group A only from the first supercharger 23.
高負荷運転時には第１および第２気筒群Ａ、 Ｂが共に
稼動し、第１および第２スーパーチャージャ２３．２４
が駆動される。回転数が比較的低い場合には、第２図の
（３）に示されるように、仕切弁２６が閉塞しており、
第１および第２気筒群Ａ。During high-load operation, the first and second cylinder groups A and B operate together, and the first and second superchargers 23.24
is driven. When the rotation speed is relatively low, the gate valve 26 is closed, as shown in (3) in FIG.
First and second cylinder groups A.
Ｂにはそれぞれ第１および第２スーパーチャージ中２３
．２４から別個に空気が供給される。すなわちインテー
クマニホールド２５内が仕切弁２６により分割されるこ
とにより、この中に生じる吸気脈動が効果的に利用され
、各気筒への吸気効率が高められる。さらに回転数が上
ると、第２図の（４）に示されるように仕切弁２６が開
放され、仕切弁２６が閉じたときと異なる吸気脈動を発
生させ、吸気効率が高められる。B has 23 in the 1st and 2nd supercharge respectively.
．． Air is supplied separately from 24. That is, by dividing the inside of the intake manifold 25 by the gate valve 26, the intake pulsation generated therein is effectively utilized, and the efficiency of intake into each cylinder is increased. When the rotational speed further increases, the gate valve 26 is opened as shown in (4) in FIG. 2, producing an intake pulsation that is different from when the gate valve 26 is closed, thereby increasing the intake efficiency.
以上のように本実施例によれば、低速域における部分気
筒運転の出力が向上するので部分気筒運転域を広げるこ
とができる。したがってポンプ損失の少ない運転域が拡
大されることとなって燃費が向上する。また部分気筒運
転と全気筒運転との間の切換え回数が減少するので、運
転時のショックの回数が減り、車両の耐久性の点におい
ても有利である。As described above, according to this embodiment, the output of partial cylinder operation in the low speed range is improved, so that the partial cylinder operation range can be expanded. Therefore, the operating range with less pump loss is expanded, and fuel efficiency is improved. Furthermore, since the number of times of switching between partial cylinder operation and full cylinder operation is reduced, the number of shocks during operation is reduced, which is also advantageous in terms of vehicle durability.
発明の効果
以上のように本発明によれば、極低回転域における過給
圧の上昇の応答性が向上し、部分気筒運転における出力
が高まるという効果が得られる。Effects of the Invention As described above, according to the present invention, the responsiveness of boost pressure increase in the extremely low rotation range is improved, and the output in partial cylinder operation is increased.
第１図は本発明の一実施例を示す系統図、第２図は第１
および第２スーパーチャージャと仕切弁の作動を示す図
表である。
２１・・・第１吸気通路、
２２・・・第２吸気通路、
２３・・・第１スーパーチャージャ、
２４・・・第２スーパーチャージャ、
２５・・・インテークマニホールド、
Ａ・・・第１気筒群、
Ｂ・・・第２気筒群。Fig. 1 is a system diagram showing one embodiment of the present invention, and Fig. 2 is a system diagram showing an embodiment of the present invention.
and a chart showing the operation of the second supercharger and the gate valve. 21... First intake passage, 22... Second intake passage, 23... First supercharger, 24... Second supercharger, 25... Intake manifold, A... First cylinder Group, B...Second cylinder group.
Claims (1)
する第２気筒群と、これら第１および第２気筒群の各気
筒に連通するインテークマニホールドと、このインテー
クマニホールド内を第１気筒群側と第２気筒群側とに区
画可能な仕切弁と、上記インテークマニホールドの第１
気筒群側に連通する第１吸気通路に設けられた第１スー
パーチャージャと、上記インテークマニホールドの第２
気筒群側に連通する第２吸気通路に設けられた第２スー
パーチャージャとを備え、機関回転数の上昇とともに過
給圧が上昇する極低回転時、上記第２気筒群の運転を休
止し、上記第１および第２スーパーチャージャが駆動さ
れ、かつ上記仕切弁がインテークマニホールドの第１気
筒群側と第２気筒群側とを連通させることを特徴とする
過給機付可変気筒式内燃機関。1. A first cylinder group that is always in operation, a second cylinder group that is deactivated depending on the operating state, an intake manifold that communicates with each cylinder of these first and second cylinder groups, and an intake manifold that connects the inside of this intake manifold to the first cylinder group side. and a gate valve that can be divided into a first cylinder group side and a second cylinder group side, and a first valve of the intake manifold.
A first supercharger provided in a first intake passage communicating with the cylinder group side, and a second supercharger of the intake manifold.
a second supercharger provided in a second intake passage communicating with the cylinder group side, and suspends operation of the second cylinder group at extremely low engine speeds when the supercharging pressure increases as the engine speed increases; A variable cylinder internal combustion engine with a supercharger, wherein the first and second superchargers are driven, and the gate valve allows communication between a first cylinder group side and a second cylinder group side of the intake manifold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3140385A JPS61192822A (en) | 1985-02-21 | 1985-02-21 | Variable cylinder number type internal-combustion engine equipped with supercharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3140385A JPS61192822A (en) | 1985-02-21 | 1985-02-21 | Variable cylinder number type internal-combustion engine equipped with supercharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61192822A true JPS61192822A (en) | 1986-08-27 |
Family
ID=12330290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3140385A Pending JPS61192822A (en) | 1985-02-21 | 1985-02-21 | Variable cylinder number type internal-combustion engine equipped with supercharger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61192822A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7028678B2 (en) * | 2002-02-05 | 2006-04-18 | Thomas Betz | Internal combustion engine |
-
1985
- 1985-02-21 JP JP3140385A patent/JPS61192822A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7028678B2 (en) * | 2002-02-05 | 2006-04-18 | Thomas Betz | Internal combustion engine |
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