JPS60224961A - Egr controller for diesel engine - Google Patents
Egr controller for diesel engineInfo
- Publication number
- JPS60224961A JPS60224961A JP59081450A JP8145084A JPS60224961A JP S60224961 A JPS60224961 A JP S60224961A JP 59081450 A JP59081450 A JP 59081450A JP 8145084 A JP8145084 A JP 8145084A JP S60224961 A JPS60224961 A JP S60224961A
- Authority
- JP
- Japan
- Prior art keywords
- egr
- valve
- control
- engine
- negative pressure
- 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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/52—Systems for actuating EGR valves
- F02M26/55—Systems for actuating EGR valves using vacuum actuators
- F02M26/56—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/41—Control to generate negative pressure in the intake manifold, e.g. for fuel vapor purging or brake booster
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/52—Systems for actuating EGR valves
- F02M26/64—Systems for actuating EGR valves the EGR valve being operated together with an intake air throttle
-
- 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
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は排気系通路に設けられ排気系通路面積を調節す
ることにより背圧全高めるための排気絞り弁を備えた排
気ガス再循１（ＥＧＲ）制御装置に係り、具体的にはＥ
ＧＲ弁及び排気絞り弁の開度制御に関する。Detailed Description of the Invention [Field of Application of the Invention] The present invention relates to an exhaust gas recirculation system 1 (EGR) equipped with an exhaust throttle valve provided in the exhaust system passage to completely increase back pressure by adjusting the exhaust system passage area. ) Concerning the control device, specifically E
This relates to the opening degree control of the GR valve and the exhaust throttle valve.
ディーゼルエンジンにおいては一般に吸排気の差圧が小
さいので、従来のこの珈装置にあっては排気系通路に設
けられた排気絞り弁で該通路の有効面積全調節すること
により背圧全高め、エンジンに要求されるＥＧＲ３ｌｉ
確保するようにしている。In a diesel engine, the differential pressure between the intake and exhaust is generally small, so the conventional exhaust system uses an exhaust throttle valve installed in the exhaust system passage to adjust the entire effective area of the passage, thereby increasing the back pressure and reducing the engine pressure. EGR3li required for
I'm trying to secure it.
しかしこの排気絞りは、適切に制御しないと、過剰ＥＧ
Ｒとなり、エンジンの運転状態によっては黒煙発生量の
増加、出力性能の悪化、エンジ／の耐久性の低下等の問
題が発生する。However, if this exhaust throttle is not properly controlled, excessive EG
Depending on the operating condition of the engine, problems such as an increase in the amount of black smoke generated, a deterioration in output performance, and a decrease in the durability of the engine may occur.
本発明の目的はエンジンの広範囲にわたる負荷領域にお
いてＥＧＲｉ全適切に制御することができるディーゼル
エンジンのＥＧＲ制御装置を提供することにある。An object of the present invention is to provide an EGR control device for a diesel engine that can appropriately control all EGRi over a wide range of engine load ranges.
本発明は、ディーゼルエンジンの排気系通路と吸気系通
路とを連通ずるＥＧＲ通路に設けられＥＧＲｆｆｉｋ調
節するＥＧＲ弁と、前記排気系通路におけるＥＧＲ取出
部よジ下流側に設けられ排気系通路面積を調節する排気
絞り弁装置と會有するＥＧＲ制御装置において、エンジ
ンの運転状態がＥＧＲ制御領域にある場合には制御回路
により予め記憶されている、エンジン負荷とエンジン回
転数に応じて定められたＥＧＲ弁の駆動データをエンジ
ンの運転状態に応じて補間演算し、該補間演算により得
られた駆動データに基づいて駆動装置により同一の駆動
信号で前記ＥＧＲ弁及び排気絞り弁荀駆動することによ
シ、エンジンの広範囲にわたる負荷領域においてＥＧＲ
童を適切に制御するものである。The present invention provides an EGR valve that is installed in an EGR passage that communicates an exhaust system passage and an intake system passage of a diesel engine and adjusts the EGRffik, and an EGR valve that is installed downstream of an EGR takeout part in the exhaust system passage and that controls the area of the exhaust system passage. In the EGR control device which is connected to the exhaust throttle valve device to be adjusted, when the operating state of the engine is in the EGR control region, the EGR valve is set according to the engine load and engine speed, which is stored in advance in the control circuit. Interpolation calculation is performed on the drive data according to the operating state of the engine, and based on the drive data obtained by the interpolation calculation, the EGR valve and the exhaust throttle valve are driven by the same drive signal by the drive device, EGR over a wide range of engine loads
This is to appropriately control children.
本発明の実施例を図面に基づいて説明する。第１１￥１
には本発明に係るＥＧＲ制御装置の一実施例の構成が示
されており、同図においてディーゼルエンジン１の吸気
系通路２と排気系通路３との間にはＥＧＲ弁５１に介し
てＥＧＲ通路４が前記通路２．３を連通するように形成
されている８ＥＧＲ弁５は、ＥＧＲ通路４の通路面積を
増減する弁体９と、該弁体９と一体的に形成されたロッ
ド２１の後端が固着きれたダイアフラム２３と、該ダイ
アフラム２３會図上、下方に付勢する圧縮はね２２と、
バキュームポンプ１７で発生した負圧會エンジンのをす
るより適切な負圧に制御する負圧制御弁１６と通路１８
を介して連通されたダイアフラム室とからなり、前記通
路１８に介して該ダイアフラム室８内に導入される、負
圧制御弁１６で形成された制御負圧に応じて前記排気系
通路３からＥＧＲ通路４を介して吸気系通路２に環流さ
れる排気ガスの再循環量（ＥＧＲｆｉ）’を制御するよ
うに構成されている。Embodiments of the present invention will be described based on the drawings. No. 11 ¥1
1 shows the configuration of an embodiment of an EGR control device according to the present invention. In the figure, an EGR passage is connected between an intake system passage 2 and an exhaust system passage 3 of a diesel engine 1 via an EGR valve 51. The EGR valve 5 includes a valve body 9 that increases or decreases the passage area of the EGR passage 4, and a rear rod 21 that is integrally formed with the valve body 9. A diaphragm 23 whose end is completely fixed, a compression spring 22 that urges the diaphragm 23 downward in the diagram,
Negative pressure control valve 16 and passage 18 that control the negative pressure generated by the vacuum pump 17 to a more appropriate negative pressure in the engine
EGR is introduced from the exhaust system passage 3 into the diaphragm chamber 8 through the passage 18 in accordance with the control negative pressure generated by the negative pressure control valve 16. It is configured to control the recirculation amount (EGRfi)' of exhaust gas that is recirculated to the intake system passage 2 via the passage 4.
筐た排気糸通路３のＥＧＲ取出部６より下流側には排気
絞り弁装置７が設けられている。排気絞り弁装ｆｔ７は
、ダイアフラム室４０を画成するダイアフラム４２と、
夕”イアフラム４２を口上、上方に付勢する圧縮ばね４
４と、ダイアフラム４２に一端が固着されるロッド１１
と、一端に排気絞り弁１２が固着され他端がロッド１１
に揺動可能に増り付けられたロッド３０とから構成され
ている。ダイアフラム室４０にはバキュームポンプ１７
で発生した負圧が負圧制御弁１６．通路１８．２０會介
して導入され、排気絞り弁１２は所定の開度に制御され
る。このようにＥＧＲ弁５及び排気絞ｐ弁１２は負圧制
御弁１６’（ｒ介して供給される同一負圧により連動制
御される。゛
さらに１９Ｖ′１制御回路でちゃ、制御回路１９はエン
ジン冷却水温を検出する水温センサ１３、エンジンの負
荷状９に検出する負荷センサ１４．エンジン回転数を検
出する回転数センサ１５の各検出出力を取り込み、エン
ジンの運転状態に応じてＥＧＲ通路４全介して吸気系通
路２に導入するＥＧＲガスの流量を制御するための制御
信号を負圧制御弁１６に出力する。An exhaust throttle valve device 7 is provided on the downstream side of the EGR take-out portion 6 of the exhaust thread passage 3 . The exhaust throttle valve device ft7 includes a diaphragm 42 defining a diaphragm chamber 40,
A compression spring 4 that biases the iaphragm 42 upwardly
4, and a rod 11 whose one end is fixed to the diaphragm 42.
The exhaust throttle valve 12 is fixed to one end, and the rod 11 is fixed to the other end.
It is composed of a rod 30 which is swingably attached to the rod 30. A vacuum pump 17 is installed in the diaphragm chamber 40.
The negative pressure generated in the negative pressure control valve 16. The exhaust gas is introduced through passages 18 and 20, and the exhaust throttle valve 12 is controlled to a predetermined opening degree. In this way, the EGR valve 5 and the exhaust throttle p valve 12 are controlled in conjunction with the same negative pressure supplied through the negative pressure control valve 16' (r. The detection outputs of the water temperature sensor 13 that detects the cooling water temperature, the load sensor 14 that detects the engine load state 9, and the rotation speed sensor 15 that detects the engine speed are taken in, and the EGR passage 4 is connected to the entire EGR passage 4 according to the operating state of the engine. A control signal for controlling the flow rate of EGR gas introduced into the intake system passage 2 is output to the negative pressure control valve 16.
次に第２図に制御回路１９の具体的構成金示す。Next, FIG. 2 shows the specific configuration of the control circuit 19.
同図において５０Ａ、５０Ｂはそれぞｎエンジン冷却水
温を検出する水温センサ１３、エンジン１の負荷状［−
検出する負荷センサ１４の各検出出力を所定のレベルま
で増幅するバッファアンプであり、６０はこれらのバッ
ファアンプ５０Ａ、５０Ｂの各出力を選択的に取り込む
ためのマルチプレクサ（ＭＸ）である。In the figure, 50A and 50B are a water temperature sensor 13 that detects the engine cooling water temperature, and a load state of the engine 1 [-
It is a buffer amplifier that amplifies each detection output of the load sensor 14 to a predetermined level, and 60 is a multiplexer (MX) for selectively taking in each output of these buffer amplifiers 50A and 50B.
寸た６２はマルチプレクサ６０により選択されたアナロ
グ信号をディジタル信号に変換するためのＡ ／ Ｄ変
換器、６４は入出力ボート、６６は出力ボート、７０は
一時的にデータを記憶するためのランダムアクセスメモ
リ（ＲＡＭと記す。）、７２は固定データ及びプログラ
ム等全格納するためのリードオンリメモリ（ＲＯＭと記
す。）、７４はＲＯＭ７２に格納されたプログラムに基
づいて各種の演算処理を行い、出力ポートロ６を介して
負圧制御弁１６に制御信号を出力するＣＰＵである。62 is an A/D converter for converting the analog signal selected by the multiplexer 60 into a digital signal, 64 is an input/output port, 66 is an output port, and 70 is a random access port for temporarily storing data. A memory (referred to as RAM), 72 is a read-only memory (referred to as ROM) for storing all fixed data and programs, and 74 performs various arithmetic processing based on the programs stored in the ROM 72 and output port load. This is a CPU that outputs a control signal to the negative pressure control valve 16 via 6.
更に２８はエンジン回転数を検出する回転数センサ１５
の検出出力を波形整形する整形回路、５６は各部の同期
を取るためのクロックパルスを出力するクロックパルス
発振器である。Furthermore, 28 is a rotation speed sensor 15 that detects the engine rotation speed.
56 is a clock pulse oscillator that outputs a clock pulse for synchronizing each part.
次に第３図に制御回路１９により実行されるブロクラム
の内容を示す。同図において、ブロクラムが起動される
と、ステップｌＯＯで水温センサ１３の検出出力ＴＷが
取り込まｎ、次のステップ１０２でエンジン冷却水温Ｔ
ＷがＴＷ≧に、であるか否かの判定が行われ、エンジン
冷却水温ＴＷが設定値Ｋｏ （例えば５０℃）以上であ
ると判定された場合にはステップ１０４に移行する。ス
テップ１０４では回転数センサ１５よりエンジン回転数
ＲＥの取り込みが行われ、更にステップ１０６で負荷セ
ンサ１４の検出出力しの取り込みが行われる。そしてス
テップ１０８では第４図に示すようなＲＯＭ７２に予め
記憶されているＥＧＲ弁５の制御負圧マツプに基づいて
制御回路１９でエンジンの運転状態に応じて補間演算が
なされ、制御回路１９よりその演算結果に応じた制御信
号が負圧制御弁１６に出力される。この結果、次のステ
ップ１１０でバキュームポンプ１７から負圧制御弁１６
を介してＥＧＲ弁５のダイアフラム室８及び排気絞り弁
７のダイアフラム室４０に画定の負圧が供給され、ＥＧ
Ｒ通路４會介して排気系通路３より吸気系通路２に送ら
れるＥＣ；Ｒｌｉが適切な値となるように制御される。Next, FIG. 3 shows the contents of the block diagram executed by the control circuit 19. In the figure, when the brochure is started, the detection output TW of the water temperature sensor 13 is taken in at step lOO, and the engine cooling water temperature T is taken in at the next step 102.
It is determined whether W is TW≧, and if it is determined that the engine cooling water temperature TW is equal to or higher than the set value Ko (for example, 50° C.), the process moves to step 104. In step 104, the engine rotational speed RE is taken in from the rotational speed sensor 15, and further in step 106, the detected output of the load sensor 14 is taken in. Then, in step 108, the control circuit 19 performs an interpolation calculation according to the operating state of the engine based on the control negative pressure map of the EGR valve 5 stored in advance in the ROM 72 as shown in FIG. A control signal according to the calculation result is output to the negative pressure control valve 16. As a result, in the next step 110, the vacuum pump 17 to the negative pressure control valve 16
A defined negative pressure is supplied to the diaphragm chamber 8 of the EGR valve 5 and the diaphragm chamber 40 of the exhaust throttle valve 7 through the
EC; Rli sent from the exhaust system passage 3 to the intake system passage 2 via the R passage 4 is controlled to an appropriate value.
ここで第４図に示すＥＧＲ弁５の制御負圧マッグはエン
ジン負荷りとエンジン回転数ＲＥにより定められたＥＧ
Ｒ弁５の制御負圧マッグしている。Here, the control negative pressure mag of the EGR valve 5 shown in FIG.
The control negative pressure of R valve 5 is magnified.
本実施例では飼えば上８ピマツプにおいてＥＧＲ弁５は
一１５０ｆｉＨＰで全閉状態から開き始め、−３００顛
ＨＰで全開状態となる。一方、排気絞り弁７は第５図に
示す作ｖＪＪＪ特性から明らかなように供給負圧が一１
５０關Ｈ１で全開状態から閉じ始め一３００ｆｉＨＰで
全閉状態となる。In this embodiment, the EGR valve 5 starts to open from the fully closed state at -150 fi HP and becomes fully open at -300 fi HP in the upper 8 pi map. On the other hand, as is clear from the operation vJJJ characteristics shown in FIG. 5, the exhaust throttle valve 7
It starts to close from the fully open state at 50 degrees H1, and becomes fully closed at -300fiHP.
更にステップ１０２でエンジン冷却水温がＴＷ＜Ｋｏ
と判定された場合には、すなわちエンジンの運転状態が
ＥＧＲ制御領域にないと判定された場合にはステップ１
１２に移行し、ステップ１１２で制御回路１９より負圧
制御弁１６にバキュームポンプ１７がらＥＧＲ弁５にお
けるダイアフラム室８及び排気絞り弁装置７におけるダ
イアフラム室４０への負圧の供給全所つための制御信号
が出力され、この結果ＥＧＲ弁５Ｖｉ全開状態に、壕だ
排気絞り弁１２は全閉状態となり、このプログラムの実
行を終了する３、
本実施例ではＥＧＲ弁と排気絞り弁とを同一のｔ！ｉ制
御負圧で連動制御するように構成したので、本来ＥＧＲ
？Ｉ−増量したい軽負荷領域では排気絞り弁も多くして
背圧を高め、ＥＧＲｉ全確保し、さらに中負荷、高負荷
になるに従い、排気絞り−ｉｔ少なくすることができ、
結局、エンジンの広範囲にわたる負荷領域において、Ｅ
ＧＲ量全適切に制御することができる。Furthermore, in step 102, the engine cooling water temperature becomes TW<Ko.
If it is determined that the operating state of the engine is not in the EGR control region, step 1
In step 112, the control circuit 19 supplies the negative pressure control valve 16 from the vacuum pump 17 to the diaphragm chamber 8 in the EGR valve 5 and the diaphragm chamber 40 in the exhaust throttle valve device 7. A control signal is output, and as a result, the EGR valve 5Vi is fully opened and the trench exhaust throttle valve 12 is fully closed, ending the execution of this program. 3. In this embodiment, the EGR valve and exhaust throttle valve are the same. T! Since it is configured to perform interlock control using i-controlled negative pressure, originally EGR
? I-In the light load range where you want to increase the amount, you can increase the number of exhaust throttle valves to increase back pressure and ensure the full EGRi, and as the load becomes medium or high, you can reduce the exhaust throttle.
After all, over a wide range of engine loads, E
The entire amount of GR can be appropriately controlled.
本発明では、ディーゼルエンジンの排気系通路と吸気系
通路とを連通ずるＥＧＲ通路に設けられＥＧＲ量を調節
するＥＧＲ弁と、前記排気系通路におけるＥＧＲ取出部
より下流側に設けられ排気系通路面積全調節する排気絞
り弁装置と會有するＥＧＲ制御装置において、エンジン
の運転状態がＥＧＲ制御領域にある場合には、制御回路
より予め記憶さ扛ている、エンジン負荷とエンジン回転
数により定められたＥＧＲ弁の駆動データ會エンジンの
運転状態に応じて補間演算し、該補間演算により得られ
た駆動テークに基づいて駆動装置により同一の駆動信号
で前記ＥＧＲ弁及び排気絞り弁を駆動するように構成し
たので、エンジンの広範囲にわたる負荷領域においてＥ
ＧＲＪＬｋＡ切に制御することができる。In the present invention, an EGR valve is provided in an EGR passage that communicates an exhaust system passage and an intake system passage of a diesel engine to adjust the amount of EGR, and an EGR valve is provided downstream of an EGR take-out part in the exhaust system passage and has an exhaust system passage area. In an EGR control device that is connected to an exhaust throttle valve device that fully adjusts the exhaust gas, when the engine operating state is in the EGR control region, the EGR control device performs EGR control determined by the engine load and engine speed that are stored in advance from the control circuit. Valve drive data is interpolated according to the operating state of the engine, and based on the drive take obtained by the interpolation, the EGR valve and the exhaust throttle valve are driven by the same drive signal by the drive device. Therefore, E over a wide range of engine loads.
GRJLkA can be controlled precisely.
第１図は本発明に係るＥＧＲ制御装置の一実施例の構成
？示す故明図、第２図は制御回路１９の具体的構成を示
すブロック図、第３図は制御回路１９により実行される
フロフラノ・の内容金示すフローチャート、第４図はＲ
ＯＭにｂＣ憶されているＥＧＲ弁５の制御負圧マツプを
示す図、第５図σ排気絞シ弁１２の作動特性を示す図で
ある。
ｌ・・・エンジン、２・・吸気系通路、３・・排気糸通
路、４・・・ＥＧＲ通路、５・・・ＥＧＲ弁、１３・・
・水温上ンサ、１４・・負荷センサ、１５・・・回転数
セッサ、１６・・・負圧制御升、】９・・・制御回路、
７０・・・ＲＡＭ、７２ ・ＲＯＭ、７４−・・ＣＰ
Ｕ。
代理人 鵜 沼 辰 之
（ほか１名）
ｉｌ１図FIG. 1 shows the configuration of an embodiment of the EGR control device according to the present invention. FIG. 2 is a block diagram showing the specific configuration of the control circuit 19, FIG. 3 is a flowchart showing the contents of the flofurano executed by the control circuit 19, and FIG. 4 is a block diagram showing the specific configuration of the control circuit 19.
FIG. 5 is a diagram showing a control negative pressure map of the EGR valve 5 stored in the OM, and a diagram showing the operating characteristics of the σ exhaust throttle valve 12. l...Engine, 2...Intake system passage, 3...Exhaust line passage, 4...EGR passage, 5...EGR valve, 13...
・Water temperature sensor, 14... Load sensor, 15... Rotation speed sensor, 16... Negative pressure control cell, ]9... Control circuit,
70...RAM, 72 ・ROM, 74-...CP
U. Agent Tatsuyuki Unuma (and 1 other person) Figure il1
Claims (1)
とを連通ずるＥＧＲ通路と、該ＥＧＲ通路に設けられＥ
ＧＲ景全調節するＥＧＲ弁と、前記排気系通路における
ＥＧＲ取出部より下流側に設けられ排気系通路面積を調
節する排気絞り弁装置と、ＥＧＲ弁及び排気絞り弁装置
を同一の駆動信号で駆動する駆動装置と、エンジンの運
転状態を示す各池センサの検出出力を増り込み、エンジ
ンの運転状態がＥＧＲ制御領域にある場合には、前記検
出出力に基づいて予め記憶されている、エンジン負荷と
エンジン回転数により定められたＥＧＲ弁の駆動データ
を補間演算し、前記駆動装置が該補間演算により得られ
た駆動データに基づいて駆動信号を出力させるための制
御信号を駆動装置に出力する制御回路とから構成される
ことを特徴とするディーゼルエンジンのＥＧＲ制御装置
。(1) An EGR passage that communicates the exhaust system passage and intake system passage of a diesel engine, and an EGR passage provided in the EGR passage.
An EGR valve that adjusts the GR scenery, an exhaust throttle valve device that is provided downstream of the EGR take-out portion in the exhaust system passage and that adjusts the area of the exhaust system passage, and the EGR valve and the exhaust throttle valve device are driven by the same drive signal. The detection output of each sensor indicating the operating state of the engine is increased, and when the operating state of the engine is in the EGR control region, the engine load is increased, which is stored in advance based on the detected output. and a control signal for interpolating EGR valve drive data determined by the engine speed and outputting a control signal to the drive device for causing the drive device to output a drive signal based on the drive data obtained by the interpolation. An EGR control device for a diesel engine, comprising a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59081450A JPS60224961A (en) | 1984-04-23 | 1984-04-23 | Egr controller for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59081450A JPS60224961A (en) | 1984-04-23 | 1984-04-23 | Egr controller for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60224961A true JPS60224961A (en) | 1985-11-09 |
Family
ID=13746736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59081450A Pending JPS60224961A (en) | 1984-04-23 | 1984-04-23 | Egr controller for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60224961A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62178765A (en) * | 1986-01-31 | 1987-08-05 | Hino Motors Ltd | Exhaust gas dioxidating device for engine |
| JPS63173839A (en) * | 1987-01-12 | 1988-07-18 | Nippon Denso Co Ltd | Exhaust gas recirculation control device |
| US6945235B1 (en) * | 2003-08-28 | 2005-09-20 | Volvo Lastvagner Ab | Pulse reflecting method and arrangement in an exhaust gas recirculation system |
-
1984
- 1984-04-23 JP JP59081450A patent/JPS60224961A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62178765A (en) * | 1986-01-31 | 1987-08-05 | Hino Motors Ltd | Exhaust gas dioxidating device for engine |
| JPS63173839A (en) * | 1987-01-12 | 1988-07-18 | Nippon Denso Co Ltd | Exhaust gas recirculation control device |
| US6945235B1 (en) * | 2003-08-28 | 2005-09-20 | Volvo Lastvagner Ab | Pulse reflecting method and arrangement in an exhaust gas recirculation system |
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