JPH0518253A - Inflow vortex control device for direct injection type diesel engine - Google Patents
Inflow vortex control device for direct injection type diesel engineInfo
- Publication number
- JPH0518253A JPH0518253A JP3192650A JP19265091A JPH0518253A JP H0518253 A JPH0518253 A JP H0518253A JP 3192650 A JP3192650 A JP 3192650A JP 19265091 A JP19265091 A JP 19265091A JP H0518253 A JPH0518253 A JP H0518253A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- closing degree
- valve opening
- command signal
- load
- 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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
-
- 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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、直接噴射式ディーゼル
エンジンの流入渦流制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inflow vortex control system for a direct injection diesel engine.
【０００２】[0002]
【従来の技術】直接噴射式ディーゼルエンジンにおいて
は、周知のように、燃焼性能を高くする一要素として、
エンジンの回転速度の変化にかかわらず、スワール比を
ほぼ一定の適正な値に保つ必要がある。ところが、エン
ジンの回転速度が低くなるほど、吸気の流速が低下して
流入渦流が弱まり、スワール比が低下して燃焼性能が悪
化する。これを防ぐために、流入渦流制御装置を用い、
エンジンの回転速度が低くなるほど流入渦流を強くし
て、スワール比の低下を防ぐようにする事が考えられて
いる。この直接噴射式ディーゼルエンジンの流入渦流制
御装置として、従来技術では図２に示すように構成した
ものがある。すなわち、直接噴射式ディーゼルエンジン
１の回転速度を回転速度センサ２で検出することに基づ
き、弁閉度演算手段３が弁閉度を演算して弁閉度指令信
号Ｍを出力して、アクチュエータ４を介して、吸気通路
５内の吸気流速調節弁６の閉弁度を制御するように構成
する。そして、上記回転速度センサ２の検出回転速度Ｎ
が、高い場合よりも低い場合の方が、上記弁閉度演算手
段３の弁閉度指令信号Ｍの値を大きくして、吸気流速調
節弁６の閉弁度を大きくし、吸気通路５内の吸気流速の
増速度合いを高めるように構成したものである。尚、説
明の便宜上、高速・高負荷運転状態において、適正なス
ワール比が得られるように、吸気流速調節弁６の弁開度
が設定された場合を例にとって、以下説明を進める。2. Description of the Related Art As is well known, in a direct injection diesel engine, one of the factors for improving combustion performance is
It is necessary to maintain the swirl ratio at an almost constant and appropriate value regardless of the change in the engine speed. However, as the engine speed decreases, the flow velocity of intake air decreases, the inflow vortex weakens, the swirl ratio decreases, and combustion performance deteriorates. To prevent this, use an inflow vortex controller
It is considered that the inflow vortex is strengthened as the engine speed decreases and the reduction of the swirl ratio is prevented. As an inflow eddy current control device for this direct injection type diesel engine, there is a conventional device configured as shown in FIG. That is, based on the rotation speed sensor 2 detecting the rotation speed of the direct injection diesel engine 1, the valve closing degree calculating means 3 calculates the valve closing degree and outputs the valve closing degree command signal M, and the actuator 4 The valve closing degree of the intake flow velocity control valve 6 in the intake passage 5 is controlled via the. Then, the detected rotation speed N of the rotation speed sensor 2
Is higher than the higher value, the value of the valve closing degree command signal M of the valve closing degree calculating means 3 is increased to increase the degree of closing of the intake flow velocity control valve 6, and the inside of the intake passage 5 is increased. It is configured so as to increase the rate of increase of the intake flow velocity. For convenience of description, the description will be given below by taking as an example the case where the valve opening degree of the intake flow velocity control valve 6 is set so as to obtain an appropriate swirl ratio in a high-speed / high-load operation state.
【０００３】[0003]
【発明が解決しようとする課題】上記の従来技術では、
次の（イ）又は（ロ）の問題がある。 （イ）中〜低速・中〜低負荷運転状態において、適正なス
ワール比が得られるように、吸気流速調節弁６の閉弁度
を大きめにしてマッチングさせた場合。中〜低速・高負
荷運転時には、ガバナによる負荷上昇に伴う回転低下分
だけ吸気流速調節弁６の閉弁度がさらに大きくなるた
め、適正なスワール比が得られるものの、吸気抵抗が大
きくなって充填効率が低下するので、トルクが低下す
る。 （ロ）中〜低速・高負荷運転状態において、高トルクが
得られるように吸気流速調節弁６の閉弁度を小さめにし
てマッチングさせた場合。中〜低速・中〜低負荷運転時
には、ガバナによる負荷低下に伴う回転上昇分だけ吸気
流速調節弁６の閉弁度がさらに小さくなるため、スワー
ル比が適正値よりも小さい側にずれた値に保たれてスワ
ール不足となり、燃焼性能が悪くなるので燃費が悪化す
るうえ、排気ガス中の未燃焼有害成分が増大する。本発
明の課題は、中〜低速・高負荷運転時にはトルクを充分
に高めながらも、中〜低速・中〜低負荷運転時には燃焼
性能を高めることにある。SUMMARY OF THE INVENTION In the above prior art,
There are the following problems (a) and (b). (A) In the medium to low speed / medium to low load operation state, when the close degree of the intake flow velocity control valve 6 is set to a large degree so as to obtain an appropriate swirl ratio, matching is performed. During medium to low speed / high load operation, the degree of closing of the intake flow velocity control valve 6 is further increased due to the decrease in rotation due to the increase in load due to the governor, so an appropriate swirl ratio can be obtained, but intake resistance increases and filling occurs. Since the efficiency is reduced, the torque is reduced. (B) In the medium to low speed / high load operation state, the degree of closing of the intake flow velocity control valve 6 is made smaller so as to obtain high torque, and matching is performed. During medium to low speed / medium to low load operation, the degree of closing of the intake flow velocity control valve 6 is further reduced by the amount of rotation increase due to the load reduction by the governor, so the swirl ratio deviates to a value smaller than the appropriate value. It is maintained and the swirl becomes insufficient, and the combustion performance deteriorates, so that the fuel efficiency deteriorates and the unburned harmful components in the exhaust gas increase. An object of the present invention is to improve combustion performance during medium-low speed / medium-low load operation while sufficiently increasing torque during medium-low speed / high load operation.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記課題を解
決するために、例えば図１に示すように、上記の従来技
術において、次の構成を追加したことを特徴とする。す
なわち、エンジン１の負荷の大きさを、負荷センサ７で
検出することに基づき、弁開度演算手段８が弁開度を演
算して弁開度指令信号Ｐを出力して、弁開閉度合演算手
段９で前記弁閉度演算手段３の弁閉度指令信号Ｍの値を
補正させるように構成する。そして、この負荷センサ７
の検出負荷Ｌが、小さい場合よりも大きい場合の方が、
上記弁開度演算手段８の弁開度指令信号Ｐの値を大きく
して、上記弁開閉度合演算手段９で、上記弁閉度演算手
段３の弁閉度指令信号Ｍの値を減少方向に補正するよう
に構成したものである。In order to solve the above-mentioned problems, the present invention is characterized in that the following constitution is added to the above-mentioned conventional technique as shown in FIG. 1, for example. That is, based on the load of the engine 1 being detected by the load sensor 7, the valve opening calculation means 8 calculates the valve opening and outputs the valve opening command signal P to calculate the valve opening / closing degree. The means 9 is configured to correct the value of the valve closing degree command signal M of the valve closing degree calculating means 3. And this load sensor 7
When the detection load L of is larger than when it is small,
The value of the valve opening degree command signal P of the valve opening degree calculating means 8 is increased, and the value of the valve closing degree command signal M of the valve closing degree calculating means 3 is decreased by the valve opening degree degree calculating means 9. It is configured to correct.
【０００５】[0005]
【作用】本発明は次のように作用する。 （イ）中〜低速・高負荷運転時。 回転速度センサ２の検出回転速度Ｎが中〜低速を示し、
弁閉度演算手段３の弁閉度指令信号Ｍの値が中〜大にな
り、吸気流速調節弁６の閉弁度を中〜大にして吸気流速
の増速度合いを高めて、スワール率を適正値に保とうと
する。これと同時に、負荷センサ７の検出負荷Ｌが大き
い値を示し、弁開度演算手段８の弁開度指令信号Ｐの値
が大きくなり、上記弁閉度演算手段３の弁閉度指令信号
Ｍの値が弁開閉度合演算手段９でかなり小さくされて、
吸気流速調節弁６の閉弁度を上記の中〜大よりも小さめ
の値にする。これにより、吸気流速の増速度合いが小さ
くなり、スワール率が適正値よりも少し小さめになりは
するものの、吸気通路５の吸気抵抗が小さくなって充填
効率が高まり、トータルとしてトルクが高くなる。 （ロ）中〜低速・中〜低負荷運転時。 負荷センサ７の検出負荷Ｌが中〜小の値を示し、弁開度
演算手段８の弁開度指令信号Ｐの値が小さくなり、弁閉
度演算手段３の弁閉度指令信号Ｍの値が弁開閉度合演算
手段９であまり小さくされず、吸気流速調節弁６の閉弁
度を上記の中〜大の値又はこれに近い値にする。これに
より、吸気流速の増速度合いが充分に大きくなり、スワ
ール率が適正値になり、燃焼性能が高く保持される。The present invention operates as follows. (B) Medium to low speed / high load operation. The detected rotation speed N of the rotation speed sensor 2 indicates medium to low,
The value of the valve closing degree command signal M of the valve closing degree calculating means 3 becomes medium to large, and the degree of closing of the intake flow velocity control valve 6 is made medium to large to enhance the rate of increase of the intake flow velocity to increase the swirl rate. Try to keep it at a proper value. At the same time, the detected load L of the load sensor 7 indicates a large value, the value of the valve opening degree command signal P of the valve opening degree calculation means 8 increases, and the valve closing degree command signal M of the valve closing degree calculation means 3 is increased. The value of is considerably reduced by the valve opening / closing degree calculating means 9,
The degree of closing of the intake flow velocity control valve 6 is set to a value smaller than the above-mentioned medium to large values. As a result, the rate of increase of the intake flow velocity is reduced and the swirl ratio is slightly smaller than the appropriate value, but the intake resistance of the intake passage 5 is reduced, the charging efficiency is increased, and the total torque is increased. (B) Medium to low speed, medium to low load operation. The detected load L of the load sensor 7 indicates a medium to small value, the value of the valve opening degree command signal P of the valve opening degree calculation means 8 decreases, and the value of the valve closing degree command signal M of the valve closing degree calculation means 3 decreases. Is not so reduced by the valve opening / closing degree calculating means 9, and the valve closing degree of the intake flow velocity control valve 6 is set to the above-mentioned medium to large value or a value close thereto. As a result, the rate of increase of the intake flow velocity becomes sufficiently large, the swirl ratio becomes an appropriate value, and the combustion performance is kept high.
【０００６】[0006]
【発明の効果】本発明は、上記のように構成され作用す
ることから、次の効果を奏する。すなわち、負荷センサ
７の検出負荷Ｌが小さい場合よりも大きい場合の方が、
上記弁開度演算手段８の弁開度指令信号Ｐの値を大きく
して、上記弁開閉度合演算手段９で、上記弁閉度演算手
段３の弁閉度指令信号Ｍの値を減少方向に補正するよう
に構成した。これにより、中〜低速・高負荷運転時に
は、弁開閉度合演算手段９が弁閉度演算手段３からの弁
閉度指令信号Ｍの値を、弁開度演算手段８からの弁開度
指令信号Ｐにより小さくして、吸気流速調節弁６の閉弁
度を小さくするので、吸気抵抗が小さくなって充填効率
が高まり、トルクが高くなる。しかも、中〜低速・中〜
低負荷運転時には、上記弁閉度指令信号Ｍの値をあまり
小さくしないで、吸気流速調節弁６の閉弁度をあまり小
さくしないので、吸気流速の増速度合いが充分に大きく
なり、スワール率が適正値になり、燃焼性能が高く保持
され燃費が改善されるうえ、排気ガス中の未燃焼有害成
分が減少する。The present invention has the following effects because it is constructed and operates as described above. That is, when the detection load L of the load sensor 7 is larger than when it is small,
The value of the valve opening degree command signal P of the valve opening degree calculating means 8 is increased, and the value of the valve closing degree command signal M of the valve closing degree calculating means 3 is decreased by the valve opening degree degree calculating means 9. It is configured to correct. As a result, during medium to low speed / high load operation, the valve opening / closing degree calculating means 9 changes the value of the valve closing degree command signal M from the valve closing degree calculating means 3 into the valve opening degree command signal from the valve opening degree calculating means 8. Since P is made smaller to reduce the degree of closing of the intake flow velocity control valve 6, intake resistance is reduced, charging efficiency is increased, and torque is increased. Moreover, medium to low speed and medium to
At the time of low load operation, the value of the valve closing degree command signal M is not made too small, and the degree of closing of the intake flow rate control valve 6 is not made too small. It becomes an appropriate value, combustion performance is kept high, fuel efficiency is improved, and unburned harmful components in exhaust gas are reduced.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面で説明する。図
１は直接噴射式ディーゼルエンジンの流入渦流制御装置
の作動系統図である。図において、直接噴射式ディーゼ
ルエンジン１の各吸気通路５に設けた搖動軸１０に、吸
気流速調節弁６を最大スワール比位置Ｑと最小スワール
比位置Ｓとの間を搖動可能に取り付けてけてある。この
吸気流速調節弁６は、弁駆動部１１によりリンク機構１
２を介して、例えば比例制御ソレノイドなどのアクチュ
エータ４に係合してある。そして、このアクチュエータ
４は、制御装置１３の弁開閉度合演算手段９を介し、弁
閉度演算手段３を経てエンジン回転速度センサ２に制御
操作可能に連携させてある。さらに、前記吸気流速調節
弁６を、前記アクチュエータ４及び制御装置１３の弁開
閉度合演算手段９を介し、弁開度演算手段８を経て燃料
噴射ポンプ１４のコントロールラック１５に付設した、
負荷センサ７にも制御操作可能に連携させてある。本発
明実施例では、エンジン１の回転速度を回転速度センサ
２で検出することに基づき、弁閉度演算手段３が弁閉度
を演算して弁閉度指令信号Ｍを出力して、アクチュエー
タ４を介して、吸気流速調節弁６の閉弁度を制御する。
そして、上記回転速度センサ２の検出回転速度Ｎが、高
い場合よりも低い場合の方が、上記弁閉度指令信号Ｍの
値を大きくして、吸気流速調節弁６の閉弁度を大きく
し、吸気通路５内の吸気流速の増速度合いを高めるよう
にする。さらに、前記エンジン１の負荷の大きさを負荷
センサ７で検出することに基づき、弁開度演算手段８が
弁開度を演算して弁開度指令信号Ｐを出力して、弁開閉
度合演算手段９で前記弁閉度指令信号Ｍの値を補正させ
るようにする。そして、この負荷センサ７の検出負荷Ｌ
が、小さい場合よりも大きい場合の方が、上記弁開度指
令信号Ｐの値を大きくして、上記弁開閉度合演算手段９
で、上記弁閉度指令信号Ｍの値を減少方向に補正するよ
うに構成してある。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an operation system diagram of an inflow vortex flow control device for a direct injection diesel engine. In the figure, an intake flow velocity control valve 6 is swingably attached to a swing shaft 10 provided in each intake passage 5 of a direct injection diesel engine 1 between a maximum swirl ratio position Q and a minimum swirl ratio position S. .. The intake air flow rate control valve 6 includes a valve drive unit 11 for connecting the link mechanism 1
An actuator 4, such as a proportional control solenoid, is engaged via 2. The actuator 4 is operably linked to the engine speed sensor 2 via the valve opening / closing degree calculating means 9 of the control device 13 and the valve closing degree calculating means 3. Further, the intake flow velocity control valve 6 is attached to the control rack 15 of the fuel injection pump 14 via the valve opening / closing degree calculating means 9 via the actuator 4 and the valve opening / closing degree calculating means 9 of the control device 13,
The load sensor 7 is also linked so as to be controllable. In the embodiment of the present invention, based on the rotational speed of the engine 1 detected by the rotational speed sensor 2, the valve closing degree calculating means 3 calculates the valve closing degree and outputs the valve closing degree command signal M to output the actuator 4. The degree of closing of the intake flow velocity control valve 6 is controlled via.
When the detected rotation speed N of the rotation speed sensor 2 is lower than when it is high, the value of the valve closing degree command signal M is increased to increase the degree of closing of the intake flow velocity control valve 6. The increase rate of the intake flow velocity in the intake passage 5 is increased. Further, based on the load amount of the engine 1 being detected by the load sensor 7, the valve opening calculation means 8 calculates the valve opening and outputs the valve opening command signal P to calculate the valve opening / closing degree. The means 9 corrects the value of the valve closing degree command signal M. Then, the detection load L of this load sensor 7
Is larger than the small one, the value of the valve opening command signal P is made larger and the valve opening / closing degree calculating means 9 is made larger.
Then, the value of the valve closing degree command signal M is corrected in the decreasing direction.
【図１】本発明実施例を示し、直接噴射式ディーゼルエ
ンジンの流入渦流制御装置の作動系統図である。FIG. 1 is an operation system diagram of an inflow vortex flow control device for a direct injection diesel engine according to an embodiment of the present invention.
【図２】従来例を示し、図１に相当する図である。FIG. 2 is a diagram corresponding to FIG. 1 showing a conventional example.
１…直接噴射式ディーゼルエンジン、２…回転速度セン
サ、３…弁閉度演算手段、４…アクチュエータ、５…吸
気通路、６…吸気流速調節弁、７…負荷センサ、８…弁
開度演算手段、９…弁開閉度合演算手段、Ｌ…検出負
荷、Ｍ…弁閉度指令信号、Ｎ…検出回転速度、Ｐ…弁開
度指令信号。DESCRIPTION OF SYMBOLS 1 ... Direct injection type diesel engine, 2 ... Rotational speed sensor, 3 ... Valve closing degree calculation means, 4 ... Actuator, 5 ... Intake passage, 6 ... Intake flow velocity control valve, 7 ... Load sensor, 8 ... Valve opening degree calculation means , 9 ... Valve opening / closing degree calculating means, L ... Detecting load, M ... Valve closing degree command signal, N ... Detecting rotational speed, P ... Valve opening degree command signal.
Claims (1)
転速度を回転速度センサ(２)で検出することに基づき、
弁閉度演算手段(３)が弁閉度を演算して弁閉度指令信号
(Ｍ)を出力して、アクチュエータ(４)を介して、吸気通
路(５)内の吸気流速調節弁(６)の閉弁度を制御するよう
に構成し、 上記回転速度センサ(２)の検出回転速度(Ｎ)が、高い場
合よりも低い場合の方が、上記弁閉度演算手段(３)の弁
閉度指令信号(Ｍ)の値を大きくして、吸気流速調節弁
(６)の閉弁度を大きくし、吸気通路(５)内の吸気流速の
増速度合いを高めるように構成した直接噴射式ディーゼ
ルエンジンの流入渦流制御装置において、 前記エンジン(１)の負荷の大きさを負荷センサ(７)で検
出することに基づき、弁開度演算手段(８)が弁開度を演
算して弁開度指令信号(Ｐ)を出力して、弁開閉度合演算
手段(９)で前記弁閉度演算手段(３)の弁閉度指令信号
(Ｍ)の値を補正させるように構成し、 この負荷センサ(７)の検出負荷(Ｌ)が小さい場合よりも
大きい場合の方が、上記弁開度演算手段(８)の弁開度指
令信号(Ｐ)の値を大きくして、上記弁開閉度合演算手段
(９)で、上記弁閉度演算手段(３)の弁閉度指令信号(Ｍ)
の値を減少方向に補正するように構成したことを特徴と
する直接噴射式ディーゼルエンジンの流入渦流制御装
置。What is claimed is: 1. Based on the fact that the rotation speed sensor (2) detects the rotation speed of a direct injection diesel engine (1),
The valve closing degree calculating means (3) calculates the valve closing degree and outputs a valve closing degree command signal.
(M) is output to control the degree of closing of the intake flow velocity control valve (6) in the intake passage (5) via the actuator (4). When the detected rotation speed (N) is lower than when it is high, the value of the valve closing degree command signal (M) of the valve closing degree calculating means (3) is increased to increase the intake flow velocity control valve.
In an inflow swirl control device for a direct injection diesel engine, which is configured to increase the degree of valve closing of (6) and increase the rate of increase in intake flow velocity in the intake passage (5), the load of the engine (1) Based on the size detected by the load sensor (7), the valve opening calculation means (8) calculates the valve opening and outputs a valve opening command signal (P) to output the valve opening and closing degree calculation means ( In 9), the valve closing degree command signal of the valve closing degree calculating means (3)
When the load (L) of the load sensor (7) is larger than the load (L) of the load sensor (L), the valve opening command of the valve opening calculation means (8) is corrected. By increasing the value of the signal (P), the valve opening / closing degree calculation means
In (9), the valve closing degree command signal (M) of the valve closing degree calculating means (3).
The inflow vortex control device for a direct injection diesel engine, characterized in that it is configured so as to correct the value of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3192650A JPH0518253A (en) | 1991-07-05 | 1991-07-05 | Inflow vortex control device for direct injection type diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3192650A JPH0518253A (en) | 1991-07-05 | 1991-07-05 | Inflow vortex control device for direct injection type diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0518253A true JPH0518253A (en) | 1993-01-26 |
Family
ID=16294776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3192650A Pending JPH0518253A (en) | 1991-07-05 | 1991-07-05 | Inflow vortex control device for direct injection type diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0518253A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS608420A (en) * | 1983-06-27 | 1985-01-17 | Hino Motors Ltd | Intake air swirl control device of engine |
| JPS60230512A (en) * | 1984-04-27 | 1985-11-16 | Hino Motors Ltd | Swirl strength regulating device for direct injection type diesel engine |
-
1991
- 1991-07-05 JP JP3192650A patent/JPH0518253A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS608420A (en) * | 1983-06-27 | 1985-01-17 | Hino Motors Ltd | Intake air swirl control device of engine |
| JPS60230512A (en) * | 1984-04-27 | 1985-11-16 | Hino Motors Ltd | Swirl strength regulating device for direct injection type diesel engine |
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