JPS62279261A - Egr valve control device - Google Patents
Egr valve control deviceInfo
- Publication number
- JPS62279261A JPS62279261A JP61122711A JP12271186A JPS62279261A JP S62279261 A JPS62279261 A JP S62279261A JP 61122711 A JP61122711 A JP 61122711A JP 12271186 A JP12271186 A JP 12271186A JP S62279261 A JPS62279261 A JP S62279261A
- Authority
- JP
- Japan
- Prior art keywords
- egr valve
- egr
- closed position
- fully closed
- control device
- 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
- 230000002159 abnormal effect Effects 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 9
- 230000005856 abnormality Effects 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000006866 deterioration Effects 0.000 abstract description 3
- 239000004615 ingredient Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
１ 発明の詳細な説明
〔産業上の利用分野〕
この発明は自動車などに用いる内燃機関のＥＧＲバルブ
制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION 1. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an EGR valve control device for an internal combustion engine used in automobiles and the like.
一般に自動車などに使用する内燃機関では排気ガス対策
として排気ガスの一部を吸気系へ再循環させるＥＧＲ制
御装置を備えているものがある。Generally, some internal combustion engines used in automobiles and the like are equipped with an EGR control device that recirculates a portion of the exhaust gas to the intake system as a measure against exhaust gas.
このＥＧＲ制御装置とは、例えばＥＧＲバルブの開閉度
を検知するとともに、エンジン−転数、水温などのエン
ジンの状態を代表する情報を知９、これらの情報からエ
ンジンに最適なＥＧＲ量を決定し、このＥ Ｇ Ｒｉｔ
に対応するようＥＧＲバルブの開閉度を制御するもので
ある。This EGR control device detects, for example, the opening/closing degree of the EGR valve, as well as information representative of the engine condition such as engine speed and water temperature9, and determines the optimal EGR amount for the engine from this information. , this E G Rit
The opening/closing degree of the EGR valve is controlled to correspond to the following.
ところでこの棟のＥＧＲ制御装置では、ＥＧＲバルブの
開閉度を検知してＥＧＲ量を決定するため、ＥＧＲバル
ブの開閉度すなわちＥＧＲバルブ通過排気ガス流量に異
常がないか否かを判定することは、排気ガス再循環量に
より排気ガス中の有毒成分（ＮＯｘ） ｉ−およびドラ
イバビリティに影響を与える点から重要である。By the way, the EGR control device in this building determines the EGR amount by detecting the degree of opening and closing of the EGR valve, so it is difficult to determine whether there is any abnormality in the degree of opening or closing of the EGR valve, that is, the flow rate of exhaust gas passing through the EGR valve. This is important because the amount of exhaust gas recirculation affects the toxic components (NOx) in the exhaust gas and drivability.
そして従来このような′ＦＪＧＲバルブの開閉度に異常
が発生しているか否かの判定は、ＥＧＲノ々ルプの全閉
位置が所定値以上か若しくは所定値未満すなわち全閉位
置でのＥ Ｇ Ｒガス流量が非常に多いか若しくは有シ
得ない値であることＫよシ検出を行っていた。Conventionally, the determination as to whether an abnormality has occurred in the opening/closing degree of the 'FJGR valve is determined by determining whether the fully closed position of the EGR nozzle is greater than or equal to a predetermined value or less than a predetermined value, that is, when the EGR nozzle is in the fully closed position. It was detected that the gas flow rate was extremely high or had an impossible value.
従来のＥＧＲバルブ制御装置は、ＥＧＲバルブの全閉位
置が所定値以上若しくは所定値未満であることがらＥＧ
Ｒ／々ルブに異常があるかを検出する手法であるため、
全閉位置が排気ガス中の炭素成分の蓄積等の要因で徐々
にＥＧＲガス減量側に変化してしまった場合は異常と判
定できない問題点があった。Conventional EGR valve control devices do not allow EGR valve control because the fully closed position of the EGR valve is greater than or equal to a predetermined value or less than a predetermined value.
Since this is a method to detect whether there is an abnormality in the R/T lube,
There is a problem in that if the fully closed position gradually changes to the EGR gas reduction side due to factors such as accumulation of carbon components in the exhaust gas, it cannot be determined that there is an abnormality.
この発明は上記の問題点を解決するためになされたもの
で、排気ガス成分の悪化やドライバビリティの悪化を防
止できるＥＧＲノ々ルプ制御装置を得ることを目的とす
る。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an EGR nozzle control device that can prevent deterioration of exhaust gas components and drivability.
この発明に係るＥＧＲバルブ制御装置は、ＥＧＲバルブ
の全閉位置を検出する全閉位置検出手段と、検出した全
閉位置と記憶された所定の全閉位置との差を演算し、こ
の差が所定値を超えた場合はＥＧＲバルブが異常である
と判断するＥＧＲバルブ異常判定手段とを備えたもので
ある。The EGR valve control device according to the present invention includes a fully closed position detection means for detecting the fully closed position of the EGR valve, and calculates a difference between the detected fully closed position and a predetermined stored fully closed position, and calculates the difference between the detected fully closed position and a predetermined stored fully closed position. The EGR valve abnormality determination means determines that the EGR valve is abnormal if the value exceeds a predetermined value.
この発明においては、ＥＧＲバルブの全閉位置が排気ガ
ス中の炭素成分の蓄積等の要因で徐々に変化した場合、
この全閉位置を所定の値として例えば予め記憶した全閉
位置と比較してその差を演算し１、この差が所定値以上
となった時ＥＧＲバルブが異常であると判断する。In this invention, when the fully closed position of the EGR valve gradually changes due to factors such as accumulation of carbon components in exhaust gas,
This fully closed position is compared with, for example, a previously stored fully closed position as a predetermined value, and the difference is calculated 1. When this difference is equal to or greater than a predetermined value, it is determined that the EGR valve is abnormal.
第１図はこの発明の一実施例によるＥＧＲバルブ制御装
置の構成因である。図において、１はエンジン本体、２
は排気ガスを再循環させるためのＥＧＲバルブで、排気
管から吸気管への接続通路に配設され、再循環量を制御
する。でた、３はＥＧＲバルブ２の開閉度を検出するＥ
ＧＲバルブ位置検出器、４は′ＦＪＧＲバルブ２の開閉
度を制御するＥＧＲバルブ駆動回路である。５は制御回
路で、エンジン回転数検出器６、水温センサおよび負荷
に対するスイッチ８等のエンジンの作動状態を知る情報
を入力し、そのエンジン作動状態に最適なＥＧＲｌｉを
決定してＥ ｃ Ｒノｚルブ２がこの値に対応した開閉
度となるよう駆動回路４に駆動信号を出力する。FIG. 1 shows the components of an EGR valve control device according to an embodiment of the present invention. In the figure, 1 is the engine body, 2
The EGR valve is for recirculating exhaust gas, and is installed in the connecting passage from the exhaust pipe to the intake pipe to control the amount of recirculation. 3 is E which detects the opening/closing degree of EGR valve 2.
The GR valve position detector 4 is an EGR valve drive circuit that controls the opening/closing degree of the FJGR valve 2. Reference numeral 5 denotes a control circuit which inputs information on the operating state of the engine, such as an engine speed detector 6, a water temperature sensor, and a switch 8 for the load, and determines the optimum EGRli for the engine operating state. A drive signal is output to the drive circuit 4 so that the valve 2 has an opening/closing degree corresponding to this value.
ここで制御回路５は第２図に示すように、演算処理装置
（以下ＣＰＵと略記する）１０と、ＥＧＲ流量を制御す
るためのプログラムや定数等を記憶し、たリードオンリ
ーメモリ（以下ＲＯＭと略記する）１１と、演算途中の
結果などを記憶するランダムアクセスメモリ（以下ＲＡ
Ｍと略記する）と、エンジン回転数検出器６からの信号
やＥＧＲバルブ駆動装置４の駆動信号送受用のインター
フェイス（以下ＩＦＣと略記する）１３とから構成され
ている。As shown in FIG. 2, the control circuit 5 includes an arithmetic processing unit (hereinafter abbreviated as CPU) 10 and a read-only memory (hereinafter referred to as ROM) that stores programs, constants, etc. for controlling the EGR flow rate. (abbreviated) 11, and a random access memory (hereinafter referred to as RA
The interface (hereinafter abbreviated as IFC) 13 is configured to transmit and receive signals from the engine speed detector 6 and drive signals for the EGR valve drive device 4 (hereinafter abbreviated as IFC).
次にかかる構成のＥＧＲバルブ制御装置の動作について
第３図のフローチャートを用いて説明する。機関が始動
するとＣＰＵｌ０はＲＯＭＩ ＩＫ記憶されたプログラ
ムに従って図に示すルーチンの処理を実行する。すなわ
ちＣＰＵｌ０はステップ１００で回転数検出器６からの
出力信号を取り込み、この信号の周期を計測することに
より機関回転数Ｎを検出する。この回転数が所定回転を
上回った時からある期間ステップ１０１においてＥＧＲ
駆動回路４よ、ＤＥＧＲバルブ全閉駆動信号を出力する
。七の後、ステップ１０２においてＥＧＲバルブ２の全
閉位置をＥＧＲバルブ位置検出器３からＩＦＣ１３を通
してアナログ−ディジタル変換して読取シ、この読取っ
た位置をＡとする。Next, the operation of the EGR valve control device having such a configuration will be explained using the flowchart shown in FIG. When the engine is started, the CPU 10 executes the routine shown in the figure in accordance with the program stored in the ROMIK. That is, CPU10 takes in the output signal from the rotation speed detector 6 in step 100, and detects the engine rotation speed N by measuring the period of this signal. In step 101 for a certain period from when this rotational speed exceeds a predetermined rotational speed, the EGR
The drive circuit 4 outputs a DEGR valve fully close drive signal. After 7, in step 102, the fully closed position of the EGR valve 2 is read by analog-to-digital conversion from the EGR valve position detector 3 through the IFC 13, and this read position is designated as A.
また以上の動作は機関回転数が所定回転数を上回った時
点で毎回行うものとする。It is also assumed that the above operations are performed every time the engine speed exceeds a predetermined speed.
次忙ステップ１０３において上記ＥＧＲノぐルブ全閉位
置検出が１回目か否かの判定を行う。１回目であればス
テップ１０４に進み、１回目の検出位置Ａを、記憶する
ＥＧＲバルブ検出位置Ｂとする。また２回目以降であれ
ばステップ１０５において記憶していたＥＧＲバルブ検
出位置Ｂと検出した全閉位置Ａとの位置の差を算出し、
その演算結果をＥＧＲバルブ位置位置変化量子る。そし
てステップ１０６においてＥＧＲバルブ位置位置変化量
子めＲＯＭＩ １に格納されていた所定の値以上に変化
しているか否かの判定を行う。ここでＥＧＲバルブ位置
変化量Ｃが所定値以上である場合はステップ１０７に進
みＥＧＲバルブ２が故障であると判断し、所定値以内の
場合はステップ１０８でＥＧＲノ々ルプ２は正常である
と判断する。In busy step 103, it is determined whether or not the EGR nozzle fully closed position is detected for the first time. If it is the first time, the process proceeds to step 104, and the first detection position A is set as the EGR valve detection position B to be stored. If it is the second time or later, the difference between the EGR valve detection position B stored in step 105 and the detected fully closed position A is calculated,
The calculation result is calculated as the EGR valve position change quantity. Then, in step 106, it is determined whether the EGR valve position has changed by more than a predetermined value stored in ROMI1. If the EGR valve position change amount C is greater than or equal to a predetermined value, the process proceeds to step 107 and it is determined that the EGR valve 2 is malfunctioning; if it is within the predetermined value, the EGR nozzle 2 is determined to be normal in step 108. to decide.
なお、上記実施例では記憶するＥＧＲバルブ全閉検出位
置Ｂに１回目検出の全閉位置を用いたが、これは予めＣ
ＰＵｌ０に格納した値または１〜５回目検出の全閉位置
の加重平均を用いても同様の効果が得られる。In the above embodiment, the fully closed position of the first detection was used as the EGR valve fully closed detection position B to be stored.
A similar effect can be obtained by using the value stored in PU10 or the weighted average of the fully closed positions detected the first to fifth times.
以上のようにこの発明によれば、時間的変化に伴うＥＧ
Ｒバルブ全閉位置の変化を検出し、この変化量が所定値
以上となった場合はＥＧＲバルブが異常であると判断す
るようにしたので、ＥＧＲ量の不適正化による排気ガス
成分の悪化やドライノ々ビリティの悪化を防止すること
ができる。As described above, according to the present invention, EG due to temporal changes
Changes in the fully closed position of the R valve are detected, and if the amount of change exceeds a predetermined value, it is determined that the EGR valve is abnormal. It is possible to prevent deterioration of dry nobility.
第１図はこの発明の一実施例によるＥＧＲバルブ制御装
置の構成図、第２図は同ＥＧＲ／々ルブ制御装置の制御
回路の構成を示すブロック図、第３図は同ＥＧＲ／々ル
ブ制御装置の動作を示すフローチャートである。
２・・・ＥＧＲ／々ルブ、３・・・ＥＧＲバルブ位置検
出器、５・・・制御回路、６・・・エンジン回転数検出
器、７・・・水温センサ。
なお、図中同一符号は同一または相描部分を示す。Fig. 1 is a block diagram showing the configuration of an EGR valve control device according to an embodiment of the present invention, Fig. 2 is a block diagram showing the configuration of a control circuit of the EGR/sub-lube control device, and Fig. 3 is a block diagram showing the configuration of the EGR/sub-lube control device. 3 is a flowchart showing the operation of the device. 2... EGR valve, 3... EGR valve position detector, 5... Control circuit, 6... Engine speed detector, 7... Water temperature sensor. Note that the same reference numerals in the figures indicate the same or contrasting parts.
Claims (2)
Ｒバルブ開度検出手段と、機関回転数、冷却水温等のＥ
ＧＲ量を決定するために必要な情報を得る手段とを備え
、これら情報およびＥＧＲバルブ開度検出手段の出力に
基づきＥＧＲバルブの開度を制御して所定のＥＧＲ量に
制御するＥＧＲバルブ制御装置において、前記ＥＧＲバ
ルブの全閉位置を検出する全閉位置検出手段と、検出し
た全閉位置と予め定められた所定の全閉位置との差を演
算し、この差が所定値を超えた場合はＥＧＲバルブが異
常であると判断するＥＧＲバルブ異常判定手段とを備え
たことを特徴とするＥＧＲバルブ制御装置。(1) EG that detects the opening/closing degree of the EGR valve of the internal combustion engine
R valve opening detection means, engine speed, cooling water temperature, etc.
an EGR valve control device that controls the opening of the EGR valve to a predetermined EGR amount based on the information and the output of the EGR valve opening detection means. The fully closed position detection means detects the fully closed position of the EGR valve, and calculates the difference between the detected fully closed position and a predetermined fully closed position, and if this difference exceeds a predetermined value. An EGR valve control device comprising: EGR valve abnormality determining means for determining that the EGR valve is abnormal.
憶した所定の全閉位置であることを特徴とする特許請求
の範囲第１項記載のＥＧＲバルブ制御装置。(2) The EGR valve control device according to claim 1, wherein the predetermined fully closed position is a predetermined fully closed position detected and stored in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61122711A JPS62279261A (en) | 1986-05-28 | 1986-05-28 | Egr valve control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61122711A JPS62279261A (en) | 1986-05-28 | 1986-05-28 | Egr valve control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62279261A true JPS62279261A (en) | 1987-12-04 |
Family
ID=14842712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61122711A Pending JPS62279261A (en) | 1986-05-28 | 1986-05-28 | Egr valve control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62279261A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002016751A1 (en) * | 2000-08-24 | 2002-02-28 | Mitsubishi Denki Kabushiki Kaisha | Exhaust gas recirculation valve controller |
| US7100585B2 (en) * | 2002-02-25 | 2006-09-05 | Renault S.A.S. | Method and device for diagnosing the operating condition of an internal combustion engine exhaust gas recycling valve |
| WO2008074722A1 (en) * | 2006-12-20 | 2008-06-26 | Renault S.A.S. | Actuator operation diagnostics method |
-
1986
- 1986-05-28 JP JP61122711A patent/JPS62279261A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002016751A1 (en) * | 2000-08-24 | 2002-02-28 | Mitsubishi Denki Kabushiki Kaisha | Exhaust gas recirculation valve controller |
| US7100585B2 (en) * | 2002-02-25 | 2006-09-05 | Renault S.A.S. | Method and device for diagnosing the operating condition of an internal combustion engine exhaust gas recycling valve |
| WO2008074722A1 (en) * | 2006-12-20 | 2008-06-26 | Renault S.A.S. | Actuator operation diagnostics method |
| FR2910626A1 (en) * | 2006-12-20 | 2008-06-27 | Renault Sas | METHOD FOR DIAGNOSING THE OPERATION OF AN ACTUATOR |
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