JPH09303170A - Exhaust gas recalculation device for diesel engine having gas filter - Google Patents
Exhaust gas recalculation device for diesel engine having gas filterInfo
- Publication number
- JPH09303170A JPH09303170A JP8146815A JP14681596A JPH09303170A JP H09303170 A JPH09303170 A JP H09303170A JP 8146815 A JP8146815 A JP 8146815A JP 14681596 A JP14681596 A JP 14681596A JP H09303170 A JPH09303170 A JP H09303170A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- exhaust gas
- gas recirculation
- pipe
- 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
Landscapes
- Processes For Solid Components From Exhaust (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は排気濾過器を備えた
デイーゼル機関の排気再循環装置、特に排気濾過器の目
詰りに応じて排気還流率を加減する、排気濾過器を備え
たデイーゼル機関の排気再循環装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas recirculation system for a diesel engine equipped with an exhaust filter, and more particularly to a diesel engine equipped with an exhaust filter that adjusts the exhaust gas recirculation rate according to the clogging of the exhaust filter. The present invention relates to an exhaust gas recirculation device.
【０００２】[0002]
【従来の技術】従来の排気再循環装置（ＥＧＲ）は、排
気系から排気を排気還流弁（開閉弁）を経て吸気系へ導
入するものであり、再循環する排気量と新鮮な吸気量と
の割合を調整するために、機関回転数と機関負荷などに
応じて吸気絞り弁の開度を電気的に制御している。2. Description of the Related Art A conventional exhaust gas recirculation system (EGR) introduces exhaust gas from an exhaust system into an intake system through an exhaust gas recirculation valve (open / close valve), and recirculates the exhaust gas amount and the fresh intake air amount. In order to adjust the ratio of, the opening degree of the intake throttle valve is electrically controlled according to the engine speed and the engine load.
【０００３】従来の排気再循環装置を備えたデイーゼル
機関の排気系に、排気濾過器（排気微粒子フイルタ）を
配設した場合、排気濾過器が目詰まりを起すと、機関回
転数と機関負荷が一定でも排気圧が高くなる。すなわ
ち、従来の排気再循環装置を備えていないデイーゼル機
関と同じ制御のままでは、新鮮な吸気量に対する排気還
流量（再循環排気量）の割合（排気還流率）が基準値よ
りも多くなり、機関の出力低下、耐久性の低下、排気微
粒子の増加による排気濾過器の再生回数や電力消費量の
増加などの問題が生じる。When an exhaust filter (exhaust particulate filter) is installed in the exhaust system of a conventional diesel engine equipped with an exhaust gas recirculation device, if the exhaust filter becomes clogged, the engine speed and engine load will increase. Exhaust pressure becomes high even if it is constant. That is, if the same control as that of a diesel engine that does not include a conventional exhaust gas recirculation device is maintained, the ratio of the exhaust gas recirculation amount (recirculation exhaust gas amount) to the fresh intake air amount (exhaust gas recirculation ratio) becomes larger than the reference value. There are problems such as a decrease in engine output, a decrease in durability, and an increase in the number of exhaust filter regenerations and power consumption due to an increase in exhaust particulates.
【０００４】[0004]
【発明が解決しようとする課題】本発明の課題は上述の
問題に鑑み、排気濾過器を取り付けた場合に、再循環排
気量の増加を抑え、排出ガスの有害成分の増加を防止す
るようにした排気濾過器を備えたデイーゼル機関の排気
再循環装置を提供することにある。SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to suppress an increase in the amount of recirculated exhaust gas and prevent an increase in harmful components of exhaust gas when an exhaust filter is attached. To provide an exhaust gas recirculation device for a diesel engine equipped with the exhaust filter.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
に、本発明の構成は機関回転数センサと機関負荷センサ
の信号に基づき駆動される空気圧アクチユエータと、該
空気圧アクチユエータにより弁軸を中心として回転され
る基板と、該基板に一端を連結されかつ他端を弁軸から
延びるレバーに連結されたベローズアクチユエータとを
備え、ベローズアクチユエータは排気管の排気圧により
伸縮されるようにしたものである。In order to solve the above-mentioned problems, the structure of the present invention has a pneumatic actuator driven based on signals of an engine speed sensor and an engine load sensor, and a valve shaft centered by the pneumatic actuator. It comprises a substrate to be rotated and a bellows actuator having one end connected to the substrate and the other end connected to a lever extending from the valve shaft. The bellows actuator is expanded and contracted by the exhaust pressure of the exhaust pipe. It was done.
【０００６】[0006]
【発明の実施の形態】排気濾過器がない（サイレンサを
装着しただけの）デイーゼル機関では、機関回転数とア
クセルペダルの踏込量から適正な排気還流率を求め、排
気還流弁の開閉と吸気絞り弁の開度を制御している。BEST MODE FOR CARRYING OUT THE INVENTION In a diesel engine without an exhaust filter (only equipped with a silencer), an appropriate exhaust gas recirculation rate is obtained from the engine speed and the accelerator pedal depression amount, and the exhaust gas recirculation valve is opened and closed and the intake throttle is throttled. It controls the opening of the valve.
【０００７】本発明では、デイーゼル機関の排気系に排
気濾過器を備えたことによる排気圧の変化に応じて作動
するアクチユエータにより、吸気絞り弁の開度を補正す
る。つまり、排気濾過器の目詰まりに伴う圧力損失の変
化（排気圧の変化）に応じて伸縮するベローズアクチユ
エータにより、吸気絞り弁の開度を補正する。具体的に
は、排気圧がサイレンサ装着時よりも低い時は吸気絞り
弁の開度を小さく、排気圧がサイレンサ装着時よりも高
い時は吸気絞り弁の開度を大きくする。In the present invention, the opening degree of the intake throttle valve is corrected by the actuator that operates in response to changes in exhaust pressure due to the exhaust filter provided in the exhaust system of the diesel engine. That is, the opening of the intake throttle valve is corrected by the bellows actuator that expands and contracts according to the change in pressure loss (change in exhaust pressure) due to clogging of the exhaust filter. Specifically, when the exhaust pressure is lower than when the silencer is installed, the opening of the intake throttle valve is made small, and when the exhaust pressure is higher than when the silencer is installed, the opening of the intake throttle valve is made large.
【０００８】[0008]
【実施例】図１は本発明に係る排気濾過器を備えたデイ
ーゼル機関の排気再循環装置の概略構成を示す平面図、
図２は同排気濾過器を備えたデイーゼル機関の排気再循
環装置の底面図、図３は図２の線３Ａ−３Ａによる平面
断面図である。1 is a plan view showing a schematic structure of an exhaust gas recirculation apparatus for a diesel engine equipped with an exhaust gas filter according to the present invention,
2 is a bottom view of an exhaust gas recirculation system for a diesel engine equipped with the exhaust gas filter, and FIG. 3 is a plan sectional view taken along the line 3A-3A in FIG.
【０００９】機関９の吸気系は吸気マニホルド７から延
びる吸気管５の端部に空気清浄器２が接続され、吸気管
５の上流側部分に公知の吸気絞り弁４が弁軸３と一緒に
回動可能に支持され、吸気管５の下流側部分に、すなわ
ち吸気絞り弁４の配設位置よりも下流側部分に還流管６
が接続される。機関９の排気系は排気マニホルド１０か
ら延びる排気管１３の途中に排気濾過器１４を接続され
る。また、排気マニホルド１０から還流管１２が延び、
還流管６の端部周壁へ接続される。還流管６は端部を閉
鎖され、還流管１２との接続部に弁座３３を形成され
る。排気還流弁３１は通常は図示していないばねの力に
より弁体３２が弁座３３へ押し付けられた閉位置にあつ
て、電磁コイル３１ａが励磁されると、弁体３２が弁座
３３から離れ、還流管１２を還流管６に連通するように
なつている。In the intake system of the engine 9, an air purifier 2 is connected to an end portion of an intake pipe 5 extending from an intake manifold 7, and a known intake throttle valve 4 together with a valve shaft 3 is provided in an upstream portion of the intake pipe 5. The return pipe 6 is rotatably supported and is provided at the downstream side portion of the intake pipe 5, that is, at the downstream side portion of the position where the intake throttle valve 4 is disposed.
Is connected. The exhaust system of the engine 9 is connected with an exhaust filter 14 in the middle of an exhaust pipe 13 extending from the exhaust manifold 10. Further, the return pipe 12 extends from the exhaust manifold 10,
It is connected to an end peripheral wall of the reflux pipe 6. The end portion of the reflux pipe 6 is closed, and a valve seat 33 is formed at the connecting portion with the reflux pipe 12. The exhaust gas recirculation valve 31 is normally in a closed position where the valve body 32 is pressed against the valve seat 33 by the force of a spring (not shown), and when the electromagnetic coil 31a is excited, the valve body 32 separates from the valve seat 33. The reflux pipe 12 is connected to the reflux pipe 6.
【００１０】排気マニホルド１０から排気圧を取り出す
管８が延び、後述するアクチユエータ２１へ連通され
る。吸気絞り弁４を結合する弁軸３が吸気管５の外部へ
突出され、かつ基板２９に垂直に結合される。基板２９
から延びるレバー２８に公知の空気圧アクチユエータ２
５のロツド２７が連結される。アクチユエータ２５は機
関の壁部または車体に支持したシリンダ２６の内部にピ
ストンを嵌挿してなり、ピストンにより区画される一方
の室へ加圧空気を供給すると、他方の室に収容したばね
の力に抗してロツド２７が突出し、吸気絞り弁４の開度
を減じるように構成される。A pipe 8 for taking out exhaust pressure from the exhaust manifold 10 extends and communicates with an actuator 21 which will be described later. A valve shaft 3 connecting the intake throttle valve 4 is projected to the outside of the intake pipe 5 and is vertically connected to the base plate 29. Board 29
Pneumatic actuator 2 known to the lever 28 extending from
Rod 27 of 5 is connected. The actuator 25 is formed by inserting a piston inside a cylinder 26 supported by a wall portion of an engine or a vehicle body. When pressurized air is supplied to one chamber partitioned by the piston, the force of a spring accommodated in the other chamber is applied. By contrast, the rod 27 projects so as to reduce the opening degree of the intake throttle valve 4.
【００１１】空気圧アクチユエータ２５は空気槽４４か
ら電磁制御弁４５を経て加圧空気を供給され、ロツド２
７の突出量ないし動作量を加減する。電磁制御弁４５は
機関回転数センサ４１と機関負荷センサ４２の各信号に
基づく電子制御装置４３の出力より駆動され、アクチユ
エータ２５のロツド２７の突出量を加減する。The pneumatic actuator 25 is supplied with pressurized air from the air tank 44 through the electromagnetic control valve 45, and the rod 2
The amount of protrusion or the amount of movement of 7 is adjusted. The electromagnetic control valve 45 is driven by the output of the electronic control unit 43 based on the signals of the engine speed sensor 41 and the engine load sensor 42, and adjusts the amount of protrusion of the rod 27 of the actuator 25.
【００１２】本発明によれば、排気濾過器１４の目詰ま
りが進行すると、排気マニホルド１０の排気圧が高くな
り、還流管１２、排気還流弁３１、還流管６を経て吸気
管５へ還流する排気量が増加するのを抑えるために、排
気マニホルド１０の排気圧の上昇に応じて吸気絞り弁４
の開度を増加する還流排気量補正機構Ａが構成される。
このため、基板２９の端縁から上方へ折り曲げられた取
付板片２９ａに、ベローズ２２からなるアクチユエータ
２１の一端壁が結合され、ベローズ２２の他端壁に結合
したロツド２３が、ピンにより弁軸３に結合したレバー
２４に連結される。According to the present invention, when the exhaust filter 14 is clogged, the exhaust pressure of the exhaust manifold 10 becomes high, and the exhaust pressure is recirculated to the intake pipe 5 through the recirculation pipe 12, the exhaust recirculation valve 31, and the recirculation pipe 6. In order to suppress the increase in the displacement, the intake throttle valve 4 is increased in accordance with the increase in the exhaust pressure of the exhaust manifold 10.
A recirculation exhaust gas amount correction mechanism A for increasing the opening degree is constructed.
Therefore, one end wall of the actuator 21 composed of the bellows 22 is connected to the mounting plate piece 29a bent upward from the end edge of the base plate 29, and the rod 23 connected to the other end wall of the bellows 22 is connected to the valve shaft by the pin. It is connected to a lever 24 connected to 3.
【００１３】図２，３に示すように、吸気絞り弁４を結
合する弁軸３は、吸気管５に対して軸受３ａと軸受３ｂ
により回動可能に支持される。弁軸３にレバー２４が結
合され、軸受３ｂに基板２９が相対回動可能に支持され
る。基板２９の端縁を垂直に折り曲げた取付板片２９ａ
に、アクチユエータ２１を構成する薄い耐熱性金属から
成形されたベローズ２２の一端壁が固定される一方、他
端壁に結合したロツド２３の折曲片が、レバー２４の先
端に設けた長孔２４ａへ抜けないように係合される。As shown in FIGS. 2 and 3, the valve shaft 3 connecting the intake throttle valve 4 to the intake pipe 5 has a bearing 3a and a bearing 3b.
Is rotatably supported by. A lever 24 is coupled to the valve shaft 3 and a base plate 29 is supported by the bearing 3b so as to be relatively rotatable. Mounting plate piece 29a obtained by vertically bending the edge of the substrate 29
While one end wall of a bellows 22 formed of a thin heat-resistant metal that constitutes the actuator 21 is fixed, a bent piece of a rod 23 joined to the other end wall is provided with a long hole 24a provided at a tip of a lever 24. It is engaged so as not to slip out.
【００１４】図２に示すように、基板２９に重合せ結合
した支板３５から垂直に延びる取付板片３５ａに、アク
チユエータ２５のロツド２７が連結される。アクチユエ
ータ２５は車体または機関の壁部に支持したシリンダ２
６に、ピストン３０を嵌合して作動室２６ａとばね３０
ａを収容する大気室とを区画され、ピストン３０にロツ
ド２７を結合される。As shown in FIG. 2, a rod 27 of the actuator 25 is connected to a mounting plate piece 35a which extends vertically from a support plate 35 which is superposed on and bonded to a substrate 29. The actuator 25 is a cylinder 2 supported on the wall of the vehicle body or the engine.
6, the piston 30 is fitted to the working chamber 26a and the spring 30.
The rod 27 is connected to the piston 30 by partitioning from the atmosphere chamber that accommodates a.
【００１５】次に、本発明による排気濾過器を備えたデ
イーゼル機関の排気再循環装置の作動について説明す
る。排気循環を行わない運転条件では、排気還流弁３１
は閉じ、吸気絞り弁４はアクチユエータ２５のばね３０
ａの力により全開位置に回動されている。空気が空気清
浄器２から吸気絞り弁４、吸気管５、吸気マニホルド７
を経て、デイーゼル機関９のシリンダへ吸い込まれる。
シリンダの燃焼ガスは排気マニホルド１０、排気管１３
を経て排気濾過器１４を通過する内に、排気に含まれる
カーボンなどの排気微粒子を除去されて外部へ排出され
る。Next, the operation of the exhaust gas recirculation system for a diesel engine equipped with the exhaust gas filter according to the present invention will be described. Under the operating condition where exhaust gas circulation is not performed, the exhaust gas recirculation valve 31
The intake throttle valve 4 is closed by the spring 30 of the actuator 25.
It is rotated to the fully open position by the force of a. Air flows from the air purifier 2 to the intake throttle valve 4, intake pipe 5, intake manifold 7.
After that, it is sucked into the cylinder of the diesel engine 9.
The combustion gas of the cylinder is exhaust manifold 10, exhaust pipe 13
After passing through the exhaust filter 14, the exhaust particulates such as carbon contained in the exhaust are removed and discharged to the outside.
【００１６】排気循環を行う運転条件では、排気還流弁
３１の電磁コイル３１ａが励磁され、弁体３２が弁座３
３から離れる。同時に、アクチユエータ２５の室２６ａ
へ加圧空気が供給され、ピストン３０とロツド２７がば
ね３０ａの力に抗して押し出される。したがつて、基板
２９が回動され、アクチユエータ２１を介してレバー２
４と一緒に吸気絞り弁４が図２に示す位置へ回動され
る。吸気絞り弁４の開度は機関９の運転状態に応じて電
子制御装置４３により最適値に制御される。しかし、排
気濾過器１４が目詰りすると、排気管１３の排気圧が高
くなり、すなわち、排気管１３と吸気管５の吸気絞り弁
４よりも下流側部分との圧力差が大きくなり、吸気管５
へ還流する排気量が増大する。しかし、排気管１３の排
気圧は管８を経てアクチユエータ２１へ供給されるの
で、ベローズ２２が伸長し、ロツド２３によりレバー２
４を介して吸気絞り弁４が開方向へ回動される。これに
より、吸気管５の下流側部分の負圧の度合が小さくなり
（大気圧に近くなり）、排気マニホルド１０から還流管
１２、排気還流弁３１、還流管６を経て吸気管５へ還流
する排気量が減少する。Under the operating conditions for exhaust circulation, the electromagnetic coil 31a of the exhaust gas recirculation valve 31 is excited and the valve body 32 moves to the valve seat 3
Move away from 3. At the same time, the chamber 26a of the actuator 25
Pressurized air is supplied to the piston 30 and the rod 27 to push them out against the force of the spring 30a. Therefore, the substrate 29 is rotated, and the lever 2 is moved through the actuator 21.
4, the intake throttle valve 4 is rotated to the position shown in FIG. The opening degree of the intake throttle valve 4 is controlled to an optimum value by the electronic control unit 43 according to the operating state of the engine 9. However, when the exhaust filter 14 is clogged, the exhaust pressure of the exhaust pipe 13 increases, that is, the pressure difference between the exhaust pipe 13 and a portion of the intake pipe 5 downstream of the intake throttle valve 4 increases, and the intake pipe 5
The amount of exhaust gas that recirculates to increases. However, since the exhaust pressure of the exhaust pipe 13 is supplied to the actuator 21 through the pipe 8, the bellows 22 expands and the rod 23 causes the lever 2 to move.
The intake throttle valve 4 is rotated via 4 in the opening direction. As a result, the degree of negative pressure in the downstream portion of the intake pipe 5 becomes small (close to atmospheric pressure), and the exhaust manifold 10 recirculates to the intake pipe 5 via the recirculation pipe 12, the exhaust recirculation valve 31, and the recirculation pipe 6. Displacement decreases.
【００１７】本発明による還流排気量補正機構Ａを備え
ていない機関では、図４に破線で示すように、機関回転
数と機関負荷が一定の場合に排気濾過器１４が目詰りを
起すと、排気管１３の排気圧が高くなるにつれて排気還
流量が増加する。これに対して、本発明による還流排気
量補正機構Ａを備えた機関では、図４に実線で示すよう
に、排気濾過器１４が目詰りを起しても、吸気絞り弁４
の開度がアクチユエータ２１により補正されるので、吸
気管５の吸気絞り弁４よりも下流側部分の吸気圧が大気
圧に近くなり、それだけ排気還流量が減少することにな
る。すなわち、新鮮な吸気量と排気還流量との割合、即
ち排気還流率は、排気濾過器１４の目詰りに関係なく、
所定値（ほぼ２０％）に維持される。排気管１３の排気
圧が２５０ｍｍＨｇを超えると、排気濾過器１４は再生
サイクルに入り、図示してない別の排気濾過器１４によ
り排気が浄化される。In the engine not equipped with the recirculation exhaust gas amount correcting mechanism A according to the present invention, as shown by the broken line in FIG. 4, when the exhaust filter 14 is clogged when the engine speed and the engine load are constant, The exhaust gas recirculation amount increases as the exhaust pressure of the exhaust pipe 13 increases. On the other hand, in the engine provided with the recirculation exhaust gas amount correction mechanism A according to the present invention, as shown by the solid line in FIG. 4, even if the exhaust filter 14 is clogged, the intake throttle valve 4
Since the opening degree of is corrected by the actuator 21, the intake pressure in the portion of the intake pipe 5 downstream of the intake throttle valve 4 becomes close to the atmospheric pressure, and the exhaust gas recirculation amount decreases accordingly. That is, the ratio between the fresh intake air amount and the exhaust gas recirculation amount, that is, the exhaust gas recirculation ratio, is irrespective of whether the exhaust filter 14 is clogged.
It is maintained at a predetermined value (approximately 20%). When the exhaust pressure of the exhaust pipe 13 exceeds 250 mmHg, the exhaust filter 14 enters a regeneration cycle, and the exhaust is purified by another exhaust filter 14 (not shown).
【００１８】図５に実施例では、排気管１３に配設した
排気圧センサ４６の信号を、還流排気量補正回路Ｂを経
て図１で説明した電子制御装置４３へ加え、電子制御装
置４３の出力により電磁制御弁４５を制御し、空気圧ア
クチユエータ２５を駆動するようにしたものである。空
気圧アクチユエータ２５は空気槽４４から電磁制御弁４
５を経て加圧空気を供給され、ロツド２７の突出量を加
減し、吸気絞り弁４の開度を機関の排気圧に応じて加減
し、排気還流率を所定値に保つ。In the embodiment shown in FIG. 5, the signal from the exhaust pressure sensor 46 arranged in the exhaust pipe 13 is added to the electronic control unit 43 described in FIG. The electromagnetic control valve 45 is controlled by the output to drive the pneumatic actuator 25. The pneumatic actuator 25 moves from the air tank 44 to the electromagnetic control valve 4
5, pressurized air is supplied, the amount of protrusion of the rod 27 is adjusted, the opening of the intake throttle valve 4 is adjusted according to the exhaust pressure of the engine, and the exhaust gas recirculation rate is maintained at a predetermined value.
【００１９】[0019]
【発明の効果】本発明は上述のように、機関回転数セン
サと機関負荷センサの信号に基づき駆動される空気圧ア
クチユエータと、該空気圧アクチユエータにより弁軸を
中心として回転される基板と、該基板に一端を連結され
かつ他端を弁軸から延びるレバーに連結されたベローズ
アクチユエータとを備え、ベローズアクチユエータは排
気管の排気圧により伸縮されるようにしたものであり、
従来の排気再循環装置を大幅に変更することなく、ＰＭ
およびＮＯｘを低減できる低公害のデイーゼル機関を提
供できる。As described above, according to the present invention, the pneumatic actuator driven based on the signals from the engine speed sensor and the engine load sensor, the substrate rotated about the valve shaft by the pneumatic actuator, and the substrate are provided. A bellows actuator having one end connected and the other end connected to a lever extending from the valve shaft, the bellows actuator being expanded and contracted by the exhaust pressure of the exhaust pipe,
PM without significantly changing the conventional exhaust gas recirculation device
It is possible to provide a diesel engine with low pollution that can reduce NOx and NOx.
【図１】本発明に係る排気濾過器を備えたデイーゼル機
関の排気再循環装置の概略構成を示す平面図である。FIG. 1 is a plan view showing a schematic configuration of an exhaust gas recirculation device for a diesel engine equipped with an exhaust gas filter according to the present invention.
【図２】同排気再循環装置の要部を示す底面断面図であ
る。FIG. 2 is a bottom cross-sectional view showing a main part of the exhaust gas recirculation device.
【図３】図２の線３Ａ−３Ａによる排気再循環装置の側
面断面図である。3 is a side cross-sectional view of the exhaust gas recirculation device taken along the line 3A-3A in FIG.
【図４】同排気再循環装置の作動特性を示す線図であ
る。FIG. 4 is a diagram showing operating characteristics of the exhaust gas recirculation device.
【図５】本発明の変更実施例に係る排気再循環装置の概
略構成図である。FIG. 5 is a schematic configuration diagram of an exhaust gas recirculation device according to a modified embodiment of the present invention.
Ａ：還流排気量補正機構 ２：空気清浄器 ３：弁軸
３ａ，３ｂ：軸受 ４：吸気絞り弁 ５：吸気管 ６，
１２：排気還流管 ７：吸気マニホルド ８：管９：機
関 １０：排気マニホルド １３：排気管 １４：排気
濾過器 ２１：アクチユエータ ２２：ベローズ ２
３：ロツド ２４：レバー ２４ａ：長孔２５：アクチ
ユエータ ２６：シリンダ ２６ａ：室 ２７：ロツド
２８：レバー ２９：基板 ２９ａ：取付板片 ３
０：ピストン ３０ａ：ばね ３１：排気還流弁 ３１
ａ：電磁コイル ３２：弁体 ３３：弁座 ３４： ３
５：支板 ３５ａ：取付板片 ４１：機関回転数センサ
４２：機関負荷センサ ４３：電子制御装置 ４４：
空気槽 ４５：電磁制御弁 ４６：排気圧センサA: Recirculation exhaust amount correction mechanism 2: Air purifier 3: Valve shaft
3a, 3b: Bearing 4: Intake throttle valve 5: Intake pipe 6,
12: Exhaust gas recirculation pipe 7: Intake manifold 8: Pipe 9: Engine 10: Exhaust manifold 13: Exhaust pipe 14: Exhaust filter 21: Actuator 22: Bellows 2
3: Rod 24: Lever 24a: Long hole 25: Actuator 26: Cylinder 26a: Chamber 27: Rod 28: Lever 29: Substrate 29a: Mounting plate piece 3
0: Piston 30a: Spring 31: Exhaust gas recirculation valve 31
a: electromagnetic coil 32: valve body 33: valve seat 34: 3
5: Support plate 35a: Mounting plate piece 41: Engine speed sensor 42: Engine load sensor 43: Electronic control device 44:
Air tank 45: Electromagnetic control valve 46: Exhaust pressure sensor
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０２Ｄ 45/00 ３０１ Ｆ０２Ｄ 45/00 ３０１Ｆ Ｆ０２Ｍ 25/07 ５５０ Ｆ０２Ｍ 25/07 ５５０Ｒ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location F02D 45/00 301 F02D 45/00 301F F02M 25/07 550 F02M 25/07 550R
Claims (4)
流弁を備えた排気還流管を設け、前記吸気系の排気導入
口の上流側に吸気絞り弁を設け、排気管の排気圧が高く
なるほど前記吸気絞り弁の開度が大きくなるように補正
することを特徴とする、排気濾過器を備えたデイーゼル
機関の排気再循環装置。1. An exhaust gas recirculation pipe provided with an exhaust gas recirculation valve for introducing exhaust gas from an exhaust system to an intake system, and an intake throttle valve provided upstream of an exhaust gas introduction port of the intake system so that exhaust pressure of the exhaust pipe is increased. An exhaust gas recirculation apparatus for a diesel engine equipped with an exhaust gas filter, wherein the opening degree of the intake throttle valve is corrected to increase as the valve height increases.
の排気圧の変化に伴つて伸縮しまたは角度が変化するア
クチユエータである、請求項１に記載の排気濾過器を備
えたデイーゼル機関の排気再循環装置。2. A diesel engine equipped with an exhaust filter according to claim 1, wherein the means for correcting the opening of the intake throttle valve is an actuator which expands and contracts or changes its angle in accordance with a change in exhaust pressure of the exhaust pipe. Exhaust gas recirculation system for engines.
管の排気圧に応じて吸気絞り弁の開度を電気的に制御す
る、請求項１に記載の排気濾過器を備えたデイーゼル機
関の排気再循環装置。3. The exhaust filter according to claim 1, wherein the means for correcting the opening of the intake throttle valve electrically controls the opening of the intake throttle valve according to the exhaust pressure of the exhaust pipe. Exhaust gas recirculation system for diesel engine.
に基づき駆動される空気圧アクチユエータと、該空気圧
アクチユエータにより弁軸を中心として回転される基板
と、該基板に一端を連結されかつ他端を弁軸から延びる
レバーに連結されたベローズアクチユエータとを備え、
ベローズアクチユエータは排気管の排気圧により伸縮さ
れるようにしたことを特徴とする、排気濾過器を備えた
デイーゼル機関の排気再循環装置。4. An air pressure actuator driven based on signals from an engine speed sensor and an engine load sensor, a substrate rotated about a valve shaft by the air pressure actuator, and one end of which is connected to the other end of the substrate. With a bellows actuator connected to a lever extending from the valve shaft,
The bellows actuator is an exhaust gas recirculation device for a diesel engine equipped with an exhaust filter, which is adapted to expand and contract according to the exhaust pressure of the exhaust pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8146815A JPH09303170A (en) | 1996-05-16 | 1996-05-16 | Exhaust gas recalculation device for diesel engine having gas filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8146815A JPH09303170A (en) | 1996-05-16 | 1996-05-16 | Exhaust gas recalculation device for diesel engine having gas filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09303170A true JPH09303170A (en) | 1997-11-25 |
Family
ID=15416164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8146815A Pending JPH09303170A (en) | 1996-05-16 | 1996-05-16 | Exhaust gas recalculation device for diesel engine having gas filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09303170A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008524490A (en) * | 2004-12-15 | 2008-07-10 | ルノー・エス・アー・エス | Method for controlling a supercharged engine |
-
1996
- 1996-05-16 JP JP8146815A patent/JPH09303170A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008524490A (en) * | 2004-12-15 | 2008-07-10 | ルノー・エス・アー・エス | Method for controlling a supercharged engine |
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