JPS61164036A - Intake control device of engine - Google Patents
Intake control device of engineInfo
- Publication number
- JPS61164036A JPS61164036A JP60003684A JP368485A JPS61164036A JP S61164036 A JPS61164036 A JP S61164036A JP 60003684 A JP60003684 A JP 60003684A JP 368485 A JP368485 A JP 368485A JP S61164036 A JPS61164036 A JP S61164036A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- intake
- timing
- opening
- opened
- 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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0223—Variable control of the intake valves only
- F02D13/0234—Variable control of the intake valves only changing the valve timing only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/08—Modifying distribution valve timing for charging purposes
- F02B29/083—Cyclically operated valves disposed upstream of the cylinder intake valve, controlled by external means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、吸入開始時期を変化させるエンジンの吸気制
御装置に関するものである、
（従来技術）
一般に、エンジンの吸排気弁の開放タイミングは、エン
ジンの運転状態に応じて変えることが好ましい。たとえ
ば、高速運転時には、吸気弁の開弁時間を長くして充填
効率を高めることが高出力を得る上で必要になるが、吸
気弁の開弁時間を長くすることは、低速運転時に吸気の
吹き返しの問題を生ずる。また、吸排気弁がともに開く
オーバーラツプ期間は吸気中の残留既燃ガス量に影響を
持つものであるが、エンジンの低速運転時には、このオ
ーバーラツプ期間をできるだけ短かくして残留既燃ガス
量を減少させることが、燃焼の安定性を得る上で好まし
い、しかし、オーバーラツプ期間を短かくすることは、
吸気弁の開弁時間を短かくすることになり、高速運転時
の充填量不足を招来するものであり、また高速運転時に
は吸気流の慣性が大きくなり充填効率が高まるので、オ
ーバーラツプ期間を大きくしても特に悪影響は生じず、
むしろ高出力を得る目的で充填量を増加させるためには
オーバーラツプ期間は大きい方が良い。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an engine intake control device that changes the intake start timing. (Prior Art) Generally, the opening timing of the intake and exhaust valves of an engine is determined by the following steps: It is preferable to change it depending on the operating condition of the engine. For example, during high-speed operation, it is necessary to increase the intake valve opening time to increase charging efficiency in order to obtain high output, but increasing the intake valve opening time is necessary to increase the intake This causes the problem of blowback. Additionally, the overlap period during which both the intake and exhaust valves open has an effect on the amount of residual burnt gas in the intake air, but when the engine is operating at low speed, it is recommended to reduce the amount of residual burnt gas by shortening this overlap period as much as possible. However, shortening the overlap period is preferable to obtain combustion stability.
This shortens the opening time of the intake valve, which leads to insufficient filling during high-speed operation.Also, during high-speed operation, the inertia of the intake flow increases and the filling efficiency increases, so the overlap period must be increased. However, there are no particular negative effects,
Rather, in order to increase the filling amount for the purpose of obtaining high output, the longer the overlap period, the better.
ところで、特開昭５５−１４８９３２号公報に記載され
るように、エンジンの吸気バイブ内にタイミングバルブ
を設け、該タイミングバルブの開閉タイミングを負荷に
応じて調整する調整手段を設けたものは知られている。By the way, as described in Japanese Patent Application Laid-Open No. 55-148932, there is no known engine in which a timing valve is provided in the intake vibe of the engine, and an adjustment means is provided to adjust the opening/closing timing of the timing valve according to the load. ing.
（発明の目的）
本発明は、低速運転時における燃焼の安定性を損うこと
なく、高速及び低速運転時に吸気効率を向上させ、出力
の向上を図ったエンジンの吸気制御装置を提供すること
を目的とする。(Object of the Invention) The present invention aims to provide an intake control device for an engine that improves intake efficiency and output during high-speed and low-speed operation without impairing combustion stability during low-speed operation. purpose.
（発明の構成）
本発明は、上記目的を達成するために、開弁時期及び閉
弁時期が高速タイプに設定された弁揚程特性で作動する
吸気弁と、該吸気弁上流の吸気通路に開閉可能に介設さ
れたタイミングバルブと。(Structure of the Invention) In order to achieve the above object, the present invention provides an intake valve that operates with a valve lift characteristic in which the valve opening timing and valve closing timing are set to a high-speed type, and an intake passage that is opened and closed upstream of the intake valve. Possible with interposed timing valve.
低速運転時に高速運転時よりもタイミングバルブの開放
時期を遅らせる制御手段とを有することを特徴とするも
ので、低速運転時に、タイミングバルブの開放時期を遅
らせることにより、実質的に吸気弁の開弁時期を遅らせ
るのと同様の効果を得るものである。It is characterized by having a control means that delays the opening timing of the timing valve during low-speed operation than during high-speed operation, and by delaying the opening timing of the timing valve during low-speed operation, the intake valve is substantially opened. This has the same effect as delaying the timing.
（実施例） 以下、本発明の実施例を図面に沿って説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
エンジンの吸気制御装置の全体構成を示す第１図におい
て、Ｉはシリンダブロック、２はシリンダヘッド、３は
ピストン、４は燃焼室である。In FIG. 1 showing the overall configuration of an engine intake control device, I is a cylinder block, 2 is a cylinder head, 3 is a piston, and 4 is a combustion chamber.
上記燃焼室４には、吸気弁５にて開閉される吸気口６と
、排気弁７にて開閉される排気口８とが開口し、しかし
て吸気口６には、上流側から、キャブレタ９及びタイミ
ングバルブとしてのロータリーバルブ１０が順に配設さ
れた吸気通路１１が接続されている。An intake port 6 opened and closed by an intake valve 5 and an exhaust port 8 opened and closed by an exhaust valve 7 are opened in the combustion chamber 4, and a carburetor 9 is connected to the intake port 6 from the upstream side. and an intake passage 11 in which a rotary valve 10 as a timing valve is sequentially arranged.
上記ロータリバルブ１０には周知のバルブ開度可変袋［
１２に連係され、該可変装置１２を、コントロールユニ
ット１３が回転数センサ１４よりの速度信号としての回
転数信号に応じて作動させ、開放時期を変化できるよう
になっている。The rotary valve 10 is equipped with a well-known variable valve opening bag [
12, the control unit 13 operates the variable device 12 in response to a rotational speed signal as a speed signal from the rotational speed sensor 14, so that the opening timing can be changed.
上記吸気弁５は、第２図及び第３図に示すように、開弁
時期及び閉弁時期が高速タイプに設定された弁揚程特性
で作動するように、該吸気弁５を開閉作動させるカムシ
ャフト（図示せず）のカムが形成されている。吸気弁５
は、開弁期間とリフト量を共に大きくしているので、弁
揚程特性の曲線勾配が通常タイプ（低速と高速の両方を
満足させるタイプ）に比べて大きくならず、カム面の摩
耗、動弁系のジャンプ等による吸気特性の乱れがない。As shown in FIGS. 2 and 3, the intake valve 5 has a cam that opens and closes the intake valve 5 so that the valve opening timing and closing timing are set to a high-speed type valve lift characteristic. A cam of the shaft (not shown) is formed. Intake valve 5
Since both the valve opening period and the lift amount are increased, the curve slope of the valve lift characteristic is not as large as that of the normal type (type that satisfies both low speed and high speed), which reduces wear on the cam surface and valve train. There is no disturbance in intake characteristics due to system jumps, etc.
続いて、上記コントロールユニット１３の処理の流れを
説明する。Next, the flow of processing of the control unit 13 will be explained.
先ず、エンジンの高回転運転時には、第２図に示すよう
に、吸気弁５の弁揚程特性は開弁時期及び閉弁時期が高
速タイプに設定され、吸気弁５が上死点（ＴＤＣ）前の
略３０度ぐらいで開弁じ、下死点（ＢＤＣ）後の略６０
度ぐらいで閉弁するので、吸気弁５の開弁時間が長く、
従来の排気弁７と同一の開弁時間を有する場合に比して
吸気量が多くなり（第２図斜線部分参照）、出力の向上
が図れる。また、オーバラップ期間が長くなり、充填効
率が高まり、この点からも出力の向上が図れる。First, when the engine is operating at high speed, as shown in Fig. 2, the valve lift characteristics of the intake valve 5 are set such that the valve opening timing and valve closing timing are set to high speed type, and the intake valve 5 is set to a high speed type before top dead center (TDC). The valve opens at approximately 30 degrees, approximately 60 degrees after bottom dead center (BDC).
Since the valve closes at approximately
Compared to the case where the exhaust valve 7 has the same opening time as the conventional exhaust valve 7, the amount of intake air is increased (see the shaded area in FIG. 2), and the output can be improved. Furthermore, the overlap period becomes longer, the filling efficiency increases, and the output can be improved from this point as well.
なお、高回転運転時には、ロータリバルブ１０は吸気弁
７よりも開口面積が大きくなるように制御されるので、
吸入開始時期には何ら関与しない。Note that during high-speed operation, the rotary valve 10 is controlled to have a larger opening area than the intake valve 7.
It has no influence on when to start inhalation.
一方、低回転運転時には、吸排気弁５，７は高回転運転
時と同様に開閉するが、回転数センサ１４よりの信号に
てコントロールユニット１３が、バルブ開度可変装置１
２を駆動して、ロータリバルブ１０の開放時期を遅らせ
て吸入開始時期を遅らせ、第３図に示すように実質的な
オーバラップ期間が短かくなるように制御するので、吸
気の吹き返しを防止するとともに、残留既燃ガス量を減
少させて燃焼の安定性が向上する。しかも、吸気弁５そ
のものの実際の開弁時間は高回転運転時と同様であるの
で、低回転運転時においても、従来の場合に比して吸気
充填量が多くなり（第３図斜線部分参照）、出力の向上
が図れる。On the other hand, during low-speed operation, the intake and exhaust valves 5 and 7 open and close in the same way as during high-speed operation, but the control unit 13 controls the valve opening variable device 1 based on a signal from the rotation speed sensor 14.
2, the opening timing of the rotary valve 10 is delayed, the intake start timing is delayed, and the actual overlap period is controlled to be shortened as shown in FIG. 3, so that blowback of intake air is prevented. At the same time, the amount of residual burnt gas is reduced and combustion stability is improved. Moreover, since the actual opening time of the intake valve 5 itself is the same as during high-speed operation, the intake air filling amount is larger than in the conventional case even during low-speed operation (see the shaded area in Figure 3). ), the output can be improved.
（発明の効果）
本発明は上記のように構成したから、吸気弁上流の吸気
通路に開閉可能に介設したタイミングバルブにより、低
速運転時における燃焼の安定性を損うことなく、高速運
転時のみならず低速運転時においても、充填効率を高め
、出力の向上を図ることができる。(Effects of the Invention) Since the present invention is configured as described above, the timing valve installed in the intake passage upstream of the intake valve so as to be openable and closable allows the timing valve to be opened and closed during high-speed operation without impairing combustion stability during low-speed operation. Not only that, but also during low-speed operation, it is possible to increase charging efficiency and improve output.
図面は本発明の実施例を示し、第１図はエンジンの吸気
制御装置の全体構成図、第２図及び第３図はそれぞれ高
回転運転時及び低回転運転時における吸排気弁の開放タ
イミングを示す説明図である。
５・・・・・・吸気弁、１０・・・・・・ロータリバル
ブ、１２・・・・・・バルブ開度可変装置、１３・・・
・・・コントロールユニット、１４・・・・・・回転数
センサ。
第１図
第２図
も３図The drawings show an embodiment of the present invention, and FIG. 1 is an overall configuration diagram of an engine intake control device, and FIGS. 2 and 3 show the opening timing of the intake and exhaust valves during high-speed operation and low-speed operation, respectively. FIG. 5...Intake valve, 10...Rotary valve, 12...Valve opening variable device, 13...
...Control unit, 14...Rotation speed sensor. Figure 1 Figure 2 Figure 3
Claims (1)
、開弁時期及び閉弁時期が高速タイプに設定された弁揚
程特性で作動する吸気弁と、該吸気弁上流の吸気通路に
開閉可能に介設されたタイミングバルブと、低速運転時
に、高速運転時よりもタイミングバルブの開放時期を遅
らせ、それによって吸入開始時期を遅くする制御手段と
を有することを特徴とするエンジンの吸気制御装置。(1) In an engine that changes the opening timing of the intake valve, the intake valve operates with a valve lift characteristic in which the opening timing and closing timing are set to high-speed type, and the intake passage upstream of the intake valve can be opened and closed. An intake air control device for an engine, comprising an interposed timing valve and a control means for delaying the opening timing of the timing valve during low-speed operation compared to during high-speed operation, thereby delaying the intake start timing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60003684A JPS61164036A (en) | 1985-01-11 | 1985-01-11 | Intake control device of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60003684A JPS61164036A (en) | 1985-01-11 | 1985-01-11 | Intake control device of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61164036A true JPS61164036A (en) | 1986-07-24 |
Family
ID=11564225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60003684A Pending JPS61164036A (en) | 1985-01-11 | 1985-01-11 | Intake control device of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61164036A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61200324A (en) * | 1985-03-01 | 1986-09-04 | Mazda Motor Corp | Suction device for engine |
| JPS6458386A (en) * | 1987-08-28 | 1989-03-06 | Iseki Agricult Mach | Feedback shelf in grain sorter |
| FR2656036A1 (en) * | 1989-12-18 | 1991-06-21 | Usui Kokusai Sangyo Kk | INTERNAL COMBUSTION ENGINE WITH OTTO CYCLE. |
| WO2005028829A1 (en) * | 2003-09-25 | 2005-03-31 | Siemens Aktiengesellschaft | Method and device for adjusting an exhaust gas return rate in an internal combustion engine |
| EP1710414A3 (en) * | 2005-04-08 | 2012-03-28 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Intake control apparatus of internal combustion engine |
-
1985
- 1985-01-11 JP JP60003684A patent/JPS61164036A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61200324A (en) * | 1985-03-01 | 1986-09-04 | Mazda Motor Corp | Suction device for engine |
| JPS6458386A (en) * | 1987-08-28 | 1989-03-06 | Iseki Agricult Mach | Feedback shelf in grain sorter |
| FR2656036A1 (en) * | 1989-12-18 | 1991-06-21 | Usui Kokusai Sangyo Kk | INTERNAL COMBUSTION ENGINE WITH OTTO CYCLE. |
| WO2005028829A1 (en) * | 2003-09-25 | 2005-03-31 | Siemens Aktiengesellschaft | Method and device for adjusting an exhaust gas return rate in an internal combustion engine |
| EP1710414A3 (en) * | 2005-04-08 | 2012-03-28 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Intake control apparatus of internal combustion engine |
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