JPH06200849A - Engine fuel pump controller - Google Patents
Engine fuel pump controllerInfo
- Publication number
- JPH06200849A JPH06200849A JP5017998A JP1799893A JPH06200849A JP H06200849 A JPH06200849 A JP H06200849A JP 5017998 A JP5017998 A JP 5017998A JP 1799893 A JP1799893 A JP 1799893A JP H06200849 A JPH06200849 A JP H06200849A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- drive
- control amount
- fuel pump
- increase
- 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.)
- Granted
Links
Classifications
-
- 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
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
(57)【要約】
【目的】 燃料ポンプのばらつきや劣化等による燃料噴
射量のずれを補正し、過渡時の応答性等にばらつきが生
ずるのを防止する。
【構成】 燃料噴射停止時に燃料ポンプ駆動入力値（デ
ューティ比）を増大させ（Ｓ４）、デューティ比の増大
による燃料圧力の時間あたりの上昇割合を演算し（Ｓ１
０）、燃料圧力の上昇割合を予め標準となる燃料ポンプ
に対して設定されたキャリブレーション値と比較して、
上昇割合のキャリブレーション値からのずれ量を求め、
ずれ量に応じて基本駆動特性値（基本デューティ比）の
較正を行う（Ｓ１１）。また、較正中に燃料噴射復帰し
た場合には、燃料圧力の上昇分に対し予め設定された補
正パルス幅だけインジェクタ駆動パルスのパルス幅を低
減する補正を行い（Ｓ１６）、燃料圧力が上昇していな
い状態での燃料噴射量と同じ噴射量が得られるようにす
る。
(57) [Summary] [Purpose] To correct the deviation of the fuel injection amount due to the dispersion and deterioration of the fuel pump, and to prevent the dispersion of the response during transient. [Structure] The fuel pump drive input value (duty ratio) is increased when fuel injection is stopped (S4), and the rate of increase in fuel pressure per time due to the increase in duty ratio is calculated (S1).
0), comparing the increase rate of the fuel pressure with the calibration value set in advance for the standard fuel pump,
Obtain the amount of deviation from the calibration value of the increase rate,
The basic drive characteristic value (basic duty ratio) is calibrated according to the deviation amount (S11). Further, when the fuel injection is restored during the calibration, correction is performed to reduce the pulse width of the injector drive pulse by a preset correction pulse width with respect to the increase in the fuel pressure (S16), and the fuel pressure is rising. Make sure to obtain the same injection amount as the fuel injection amount in the absence state.
Description
【０００１】[0001]
【産業上の利用分野】本発明はエンジンの燃料タンクか
らインジェクタ（燃料噴射弁）へ燃料を供給をする燃料
ポンプの制御に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of a fuel pump for supplying fuel from an engine fuel tank to an injector (fuel injection valve).
【０００２】[0002]
【従来の技術】エンジンの燃料タンクからインジェクタ
へ燃料を供給する燃料ポンプは一般に電動式であって、
例えば特開平４−６３９６２号公報に記載されているよ
うにエンジンの負荷や回転数に応じて燃料ポンプへの印
加電圧を規定するデューティ比等の駆動制御量を制御す
る燃料ポンプ制御装置を備えるのが普通である。そし
て、このような制御に加えて、燃料通路内の燃料圧力を
検出し、燃料圧力が設定値になるよう燃料ポンプの駆動
制御量を補正することが従来から行われている。2. Description of the Related Art A fuel pump for supplying fuel from an engine fuel tank to an injector is generally of an electric type.
For example, as described in Japanese Patent Laid-Open No. 4-63862, a fuel pump control device for controlling a drive control amount such as a duty ratio that regulates a voltage applied to the fuel pump in accordance with the load and the engine speed of the engine is provided. Is normal. In addition to such control, conventionally, the fuel pressure in the fuel passage is detected, and the drive control amount of the fuel pump is corrected so that the fuel pressure becomes a set value.
【０００３】[0003]
【発明が解決しようとする課題】上記のように燃料ポン
プの駆動制御量をエンジンの運転状態に応じて設定し、
かつ、その駆動制御量を燃料圧力の検出値に基づいて補
正する場合に、燃料ポンプには製造時のばらつきとか劣
化等の経時変化その他、駆動制御量が同じでも燃圧が変
わる要因があって、そのために燃料ポンプの駆動制御量
の変化に対し燃料圧力の変化割合が一定でなく、燃料噴
射量にずれが生じ、過渡時の応答性にばらつきが生ずる
という問題がある。As described above, the drive control amount of the fuel pump is set according to the operating state of the engine,
And, when the drive control amount is corrected based on the detected value of the fuel pressure, there are factors such as variations in manufacturing and changes over time such as deterioration in the fuel pump, and other factors that change the fuel pressure even if the drive control amount is the same. Therefore, there is a problem that the change rate of the fuel pressure is not constant with respect to the change of the drive control amount of the fuel pump, the fuel injection amount is deviated, and the responsiveness at the time of transition varies.
【０００４】本発明は上記問題点に鑑みてなされたもの
であって、燃料ポンプのばらつきや劣化等による燃料噴
射量のずれを補正し、過渡時の応答性等にばらつきが生
ずるのを防止することを目的とする。The present invention has been made in view of the above problems, and corrects the deviation of the fuel injection amount due to the variation and deterioration of the fuel pump, and prevents the variation of the response during the transient. The purpose is to
【０００５】[0005]
【課題を解決するための手段】本発明に係るエンジンの
燃料ポンプ制御装置は、図１の全体構成図に示すよう
に、燃料ポンプによって送り出されインジェクタへ供給
される燃料の圧力を検出する圧力センサと、予め設定さ
れた燃料ポンプ基本駆動特性に基づいて要求燃料圧力に
応じた燃料ポンプの駆動制御量を設定するとともに、圧
力センサの出力に基づいて駆動制御量を補正し、補正し
た駆動制御量の駆動信号によって燃料ポンプを制御する
駆動制御手段を備えたものであって、インジェクタによ
る燃料噴射の停止を検出する噴射停止検出手段と、噴射
停止検出手段の出力を受け燃料噴射の停止中に駆動制御
量を強制的に増大させる制御量増大手段と、制御量増大
手段による駆動制御量の強制的な増大に伴って上昇する
燃料圧力の上昇割合を予め設定された標準値と比較し、
前記上昇割合の標準値からのずれ量を燃料ポンプ駆動特
性を判定する判定値として出力する駆動特性判定手段
と、駆動特性判定手段の出力を受け、前記ずれ量に応じ
て基本駆動特性に基づく駆動制御量の設定値を較正する
基本駆動特性値較正手段を備えたことを特徴とする。As shown in the overall configuration diagram of FIG. 1, a fuel pump control apparatus for an engine according to the present invention is a pressure sensor for detecting the pressure of fuel delivered by a fuel pump and supplied to an injector. And the drive control amount of the fuel pump corresponding to the required fuel pressure is set based on the preset fuel pump basic drive characteristics, and the drive control amount is corrected based on the output of the pressure sensor, and the corrected drive control amount is set. Drive control means for controlling the fuel pump by a drive signal of the fuel injection stop detection means for detecting the stop of the fuel injection by the injector, and an output of the injection stop detection means for driving while the fuel injection is stopped. A control amount increasing means for forcibly increasing the control amount, and an increase rate of the fuel pressure that increases with the forcible increase of the drive control amount by the control amount increasing means. Compared with a preset standard value,
A drive characteristic determination unit that outputs a deviation amount of the increase rate from a standard value as a determination value for determining a fuel pump drive characteristic, and a drive characteristic determination unit that receives the output of the drive characteristic determination unit and drives based on the basic drive characteristic according to the deviation amount It is characterized in that a basic drive characteristic value calibrating means for calibrating the set value of the controlled variable is provided.
【０００６】また、上記燃料ポンプ制御装置において、
燃料噴射停止時、駆動制御量の基本値を較正するため燃
料ポンプの駆動制御量を強制的に増大させている最中に
燃料噴射復帰した場合に、燃料圧力が高いことによる燃
料噴射量のずれを補正するためには、燃料圧力制御量増
大手段による駆動制御量増大中のインジェクタの燃料噴
射復帰を検出する燃料復帰検出手段と、燃料復帰検出手
段の出力を受け、燃料噴射復帰時に制御量増大手段によ
る駆動制御量の増大に伴う燃料圧力の上昇分に応じてイ
ンジェクタ駆動の駆動パルスのパルス幅を低減する駆動
パルス幅低減手段を設ける。Further, in the above fuel pump control device,
When fuel injection is stopped while fuel injection is stopped while the fuel pump drive control amount is being forcibly increased to calibrate the basic value of the drive control amount, the difference in fuel injection amount due to high fuel pressure In order to correct this, the fuel pressure control amount increasing means detects the fuel injection return of the injector during the drive control amount increasing and the fuel return detecting means receives the output of the fuel return detecting means to increase the control amount at the time of fuel injection returning. Drive pulse width reducing means is provided for reducing the pulse width of the drive pulse for driving the injector according to the increase in fuel pressure due to the increase in the drive control amount by the means.
【０００７】[0007]
【作用】本発明の制御装置によれば、予め設定された燃
料ポンプ基本駆動特性に基づいて要求燃料圧力に応じた
燃料ポンプの駆動制御量が設定され、それに燃料圧力の
検出値に応じた補正が加えられ、補正された駆動制御量
に相当する駆動信号によって燃料ポンプが制御される。
また、燃料噴射停止中に上記駆動制御量が強制的に増大
されて、その駆動制御量の増大に伴って上昇する燃料圧
力の上昇割合の標準値からのずれ量に応じて基本駆動特
性に基づく駆動制御量の設定値が較正され、それによっ
て、燃料ポンプのばらつきとか劣化等の要因による燃料
噴射量のずれが補正され、過渡時の応答性にばらつきが
生ずるのが防止される。According to the control device of the present invention, the drive control amount of the fuel pump according to the required fuel pressure is set based on the preset fuel pump basic drive characteristics, and the correction is performed according to the detected value of the fuel pressure. Is added, and the fuel pump is controlled by the drive signal corresponding to the corrected drive control amount.
In addition, the drive control amount is forcibly increased while the fuel injection is stopped, and based on the basic drive characteristic according to the amount of deviation from the standard value of the increase rate of the fuel pressure that increases with the increase of the drive control amount. The set value of the drive control amount is calibrated, whereby the deviation of the fuel injection amount due to factors such as fuel pump variations and deterioration is corrected, and variations in transient response are prevented.
【０００８】また、本発明の請求項２の構成によれば、
較正のための駆動制御量の増大中に燃料噴射復帰が検出
された時、その駆動制御量の増大に伴う燃料圧力の上昇
分に応じてインジェクタ駆動の駆動パルスのパルス幅が
低減され、それにより、駆動制御量の増大で燃料圧力が
高くなっていることによる燃料噴射量のずれが補正され
る。According to the second aspect of the present invention,
When the fuel injection return is detected during the increase of the drive control amount for calibration, the pulse width of the drive pulse of the injector drive is reduced according to the increase in the fuel pressure due to the increase of the drive control amount, and thereby, The deviation of the fuel injection amount due to the increase in the fuel pressure due to the increase in the drive control amount is corrected.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１０】図２は本発明の一実施例のシステム図であ
る。図において、１はエンジンに搭載された燃料タンク
であり、２は燃料タンク１から燃料を送り出す電動式の
燃料ポンプである。この実施例の場合、エンジンは直列
４気筒であり、３はその各気筒の吸気通路に設けられた
燃料噴射用の各インジェクタを示す。燃料ポンプ２の吐
出側にはこれら各インジェクタ３に連通するよう配置さ
れたデリバリパイプ４に燃料を導く燃料供給通路５が延
設されている。また、デリバリパイプ４の下流側開口部
には燃料停止バルブ６を介して燃料リターン通路７が接
続され、該燃料リターン通路７の先端は燃料タンク１に
接続されている。そして、上記デリバリパイプ４には燃
料圧力を検出する圧力センサ８が設置され、また、燃料
温度を検出する温度センサ９が設置されている。これら
各センサ８，９の検出信号はエンジンコントロールユニ
ット１０に入力されて、これら入力情報に基づいて燃料
ポンプ２が制御され、また、燃料ポンプ２の基本駆動特
性値を較正するため燃料停止バルブ６の開閉制御が行わ
れる。FIG. 2 is a system diagram of an embodiment of the present invention. In the figure, 1 is a fuel tank mounted on an engine, and 2 is an electric fuel pump for sending fuel from the fuel tank 1. In the case of this embodiment, the engine has four in-line cylinders, and 3 indicates each injector for fuel injection provided in the intake passage of each cylinder. On the discharge side of the fuel pump 2, a fuel supply passage 5 for guiding fuel to a delivery pipe 4 arranged so as to communicate with each of the injectors 3 is extended. A fuel return passage 7 is connected to the downstream opening of the delivery pipe 4 via a fuel stop valve 6, and the tip of the fuel return passage 7 is connected to the fuel tank 1. A pressure sensor 8 for detecting the fuel pressure is installed in the delivery pipe 4, and a temperature sensor 9 for detecting the fuel temperature is installed. The detection signals of these sensors 8 and 9 are input to the engine control unit 10, the fuel pump 2 is controlled based on these input information, and the fuel stop valve 6 is used to calibrate the basic drive characteristic value of the fuel pump 2. Open / close control is performed.
【００１１】燃料ポンプ２の制御は、エンジンコントロ
ールユニット１０が出力するデューティ制御信号によっ
てポンプ駆動用印加電圧を制御することにより行われ
る。その際、エンジンの負荷と上記温度センサ９の出力
に応じて要求燃料圧力が演算され、予め設定された基本
駆動特性に基づいて要求燃料圧力に応じた燃料ポンプ駆
動制御量の入力値（基本駆動特性値）が読み込まれ、基
本デューティ比が設定される。図３は要求燃料圧力と燃
料ポンプ駆動制御量の入力値の関係（基本駆動特性）の
一例を示している。こうして設定されたデューティ比は
上記圧力センサ８の出力に基づいて補正され、最終デュ
ーティ比（ポンプ駆動入力値）として出力される。The control of the fuel pump 2 is performed by controlling the applied voltage for pump drive by a duty control signal output from the engine control unit 10. At that time, the required fuel pressure is calculated according to the load of the engine and the output of the temperature sensor 9, and the input value of the fuel pump drive control amount according to the required fuel pressure (basic drive) is calculated based on the preset basic drive characteristic. The characteristic value) is read and the basic duty ratio is set. FIG. 3 shows an example of the relationship (basic drive characteristic) between the required fuel pressure and the input value of the fuel pump drive control amount. The duty ratio thus set is corrected based on the output of the pressure sensor 8 and output as the final duty ratio (pump drive input value).
【００１２】また、燃料ポンプ２のばらつきや劣化等に
よる燃料噴射量のずれを補正するため、上記基本駆動特
性値の較正が繰り返し行われる。この較正は、インジェ
クタ３の燃料噴射停止時に、上記燃料停止バルブ６を閉
じてリターン通路への循環を止めた状態で、駆動制御量
の入力値であるデューティ比を増大させて、デューティ
比の増大による燃料圧力の時間あたりの上昇割合を演算
し、その演算した燃料圧力の上昇割合を予め標準となる
燃料ポンプに対して設定されたキャリブレーション値
（標準値）と比較して、その上昇割合のキャリブレーシ
ョン値からのずれ量を求め、そのずれ量に応じて上記基
本駆動特性値（基本デューティ比）を補正することによ
り行われる。Further, in order to correct the deviation of the fuel injection amount due to the dispersion and deterioration of the fuel pump 2, the above basic drive characteristic value is repeatedly calibrated. In this calibration, when the fuel injection of the injector 3 is stopped, the duty ratio which is the input value of the drive control amount is increased and the duty ratio is increased with the fuel stop valve 6 being closed to stop the circulation to the return passage. The increase rate of the fuel pressure per hour is calculated, and the calculated increase rate of the fuel pressure is compared with the calibration value (standard value) set for the standard fuel pump in advance. This is performed by obtaining the amount of deviation from the calibration value and correcting the basic drive characteristic value (basic duty ratio) according to the amount of deviation.
【００１３】図４はデューティ比（ポンプ駆動入力値）
の変化（ΔＤ）に対する時間あたりの燃圧上昇（ΔＰ）
の割合を示す特性図であって、実線で示すキャリブレー
ション値に対し実際の特性はまたはにようにプラス
側あるいはマイナス側にずれる。そこで、図５に示すよ
うに、プラス側にずれた場合（）には、ずれ量に応じ
て基本デューティ比を小さくする較正を行い、マイナス
側にずれた場合（）には、ずれ量に応じて基本デュー
ティ比を大きくする較正を行う。FIG. 4 shows the duty ratio (pump drive input value)
Rise in fuel pressure (ΔP) with respect to change in temperature (ΔD)
FIG. 7 is a characteristic diagram showing the ratio of the above, and the actual characteristic deviates to the plus side or the minus side with respect to the calibration value shown by the solid line. Therefore, as shown in FIG. 5, when the shift is toward the positive side (), calibration is performed to reduce the basic duty ratio according to the shift amount, and when the shift is toward the negative side (), the calibration is performed according to the shift amount. Calibration to increase the basic duty ratio.
【００１４】また、上記基本駆動特性値の較正中にイン
ジェクタ３が燃料噴射復帰した場合には、較正中の燃料
圧力の上昇分（燃料圧力差）に対し図６のように予め設
定された補正パルス幅だけインジェクタ３に印加する駆
動パルスのパルス幅を低減する制御が行われ、燃料圧力
が上昇していない状態での燃料噴射量と同じ噴射量が得
られるようにされる。Further, when the injector 3 recovers from the fuel injection during the calibration of the basic drive characteristic value, the increase of the fuel pressure during the calibration (fuel pressure difference) is corrected in advance as shown in FIG. The control for reducing the pulse width of the drive pulse applied to the injector 3 by the pulse width is performed so that the same injection amount as the fuel injection amount in the state where the fuel pressure is not increased is obtained.
【００１５】図７は上記実施例の燃料ポンプ制御を実行
するフローチャートである。この制御はＳ１〜Ｓ１７の
各ステップからなり、スタートすると、Ｓ１でインジェ
クタ閉の燃料カット（噴射停止）状態かどうかを見る。
そして、燃料カット状態の時には、Ｓ２へ進んで燃料停
止バルブを閉じ燃料通路出口（デリバリパイプ４の下流
開口部）を閉じる。FIG. 7 is a flow chart for executing the fuel pump control of the above embodiment. This control consists of steps S1 to S17. When the control starts, it is checked in S1 whether or not the injector is in the fuel cut (injection stopped) state.
Then, in the fuel cut state, the routine proceeds to S2, where the fuel stop valve is closed and the fuel passage outlet (downstream opening of the delivery pipe 4) is closed.
【００１６】つぎに、Ｓ３で燃料圧力値ＰAを読み込
む。そして、Ｓ４で燃料ポンプ駆動入力値（デューティ
比）をΔＤだけ増大させ、Ｓ５でタイマのカウントダウ
ンを開始する。Next, in S3, the fuel pressure value P A is read. Then, the fuel pump drive input value (duty ratio) is increased by ΔD in S4, and the timer countdown is started in S5.
【００１７】つぎに、Ｓ６でタイマのカウント値がゼロ
になったかどうかを見て、ゼロでなければ、Ｓ７へ進
み、燃料カット状態が続いているかどうかを見る。そし
て、燃料カット状態が続いていれば、Ｓ６へ戻る。Next, in S6, it is checked whether the count value of the timer has become zero. If it is not zero, the process proceeds to S7, and it is checked whether the fuel cut state continues. If the fuel cut state continues, the process returns to S6.
【００１８】Ｓ６の判定でカウント値がゼロになれば、
Ｓ８でその時点での燃料圧力値ＰBを読み込み、次い
で、Ｓ９で燃料停止バルブ６を開状態にして燃料通路出
口を開く。そして、Ｓ１０で、燃料圧力差ΔＰ（＝ＰB
−ＰA）をタイマの設定時間で割った値を基に、デュー
ティ比の変化分ΔＤに対する燃料圧力の時間あたりの上
昇割合を演算し、Ｓ１１へ進んで、上記上昇割合ΔＰが
図４の特性図に示すキャリブレーション値からどうずれ
ているかによって、その正負のずれ量に相当する値をプ
ラスする形で基本駆動特性値（基本デューティ比）の較
正を行う。If the count value becomes zero in the determination of S6,
In S8, the fuel pressure value P B at that time is read, and then in S9, the fuel stop valve 6 is opened and the fuel passage outlet is opened. Then, in S10, the fuel pressure difference ΔP (= P B
-P A ) is divided by the timer setting time to calculate the rate of increase of the fuel pressure with respect to the change ΔD of the duty ratio, and the process proceeds to S11, where the increase rate ΔP is the characteristic of FIG. The basic drive characteristic value (basic duty ratio) is calibrated by adding a value corresponding to the positive / negative deviation amount depending on how it deviates from the calibration value shown in the figure.
【００１９】また、Ｓ７の判定がＮＯということは、上
記較正のための処理が終わる前に燃料噴射復帰したとい
うことであって、この場合は、Ｓ１２でその時の燃料圧
力値ＰCを読み込み、Ｓ１３で燃料停止バルブ６を開状
態にして燃料通路出口を開く。そして、Ｓ１４でＰC−
ＰAを演算し、この燃料圧力差ＰC−ＰAを基に、Ｓ１５
で図６の特性によるパルス幅補正テーブルからインジェ
クタ駆動パルスの補正パルス幅を求めて、Ｓ１６でイン
ジェクタ駆動パルスのパルス幅補正を実行する。また、
Ｓ１の判定で燃料カット状態でないときは、較正は行わ
ず、Ｓ１７で通常の燃料ポンプ制御を行う。すなわち、
この場合、図３の基本駆動特性値による制御を行い、前
回較正し補正した学習値があるときは学習値による制御
を行う。If the determination in S7 is NO, it means that the fuel injection has returned before the above-mentioned calibration process is completed. In this case, the fuel pressure value P C at that time is read in S12, In S13, the fuel stop valve 6 is opened and the fuel passage outlet is opened. Then, at S14, P C −
P A is calculated, and based on this fuel pressure difference P C −P A , S15
Then, the correction pulse width of the injector drive pulse is obtained from the pulse width correction table based on the characteristics of FIG. 6, and the pulse width correction of the injector drive pulse is executed in S16. Also,
If it is determined in S1 that the fuel is not cut off, calibration is not performed and normal fuel pump control is performed in S17. That is,
In this case, control based on the basic drive characteristic value of FIG. 3 is performed, and if there is a learned value that was previously calibrated and corrected, control based on the learned value is performed.
【００２０】なお、上記実施例では燃料循環式の燃料経
路を備えたものについて説明したが、燃料を循環させな
い燃料経路を備えたものにも本発明は適用できる。図８
は、非循環式の燃料経路を備えたエンジンに適用した実
施例のシステム図である。図８には先の図１と共通する
部分に同一符号を付している。燃料ポンプ制御の方式は
先の実施例の場合と基本的に同じである。この場合、先
の実施例のように燃料ポンプの基本駆動特性値の較正時
に燃料通路出口を閉じる必要はない。In the above embodiment, the fuel passage of the fuel circulation type is described, but the present invention can be applied to the fuel passage of the fuel circulation type. Figure 8
FIG. 3 is a system diagram of an embodiment applied to an engine having a non-circulating fuel path. In FIG. 8, the same parts as those in FIG. 1 are designated by the same reference numerals. The method of controlling the fuel pump is basically the same as that of the previous embodiment. In this case, it is not necessary to close the fuel passage outlet when calibrating the basic drive characteristic value of the fuel pump as in the previous embodiment.
【００２１】また、上記実施例ではポンプ駆動用の印加
電圧をデューティ制御するものについて説明したが、本
発明は抵抗値の調整によって印加電圧を制御するものに
も適用できる。Further, in the above embodiment, the one in which the applied voltage for driving the pump is duty-controlled has been described, but the present invention can be applied to the one in which the applied voltage is controlled by adjusting the resistance value.
【００２２】[0022]
【発明の効果】本発明は以上のように構成されているの
で、燃料ポンプの駆動制御量の増大に伴う燃料圧力の上
昇割合を一定にして、燃料ポンプのばらつきや劣化等に
よる燃料噴射量のずれを補正することができ、特に過渡
時の応答性にばらつきが生ずるのを防止することができ
る。Since the present invention is configured as described above, the rate of increase in the fuel pressure accompanying the increase in the drive control amount of the fuel pump is made constant, and the fuel injection amount due to variations or deterioration of the fuel pump is suppressed. It is possible to correct the deviation, and it is possible to prevent the occurrence of variations in the responsiveness especially during the transition.
【図１】本発明の全体構成図FIG. 1 is an overall configuration diagram of the present invention.
【図２】本発明の一実施例のシステム図FIG. 2 is a system diagram of an embodiment of the present invention.
【図３】本発明の一実施例に係る燃料ポンプの基本駆動
特性図FIG. 3 is a basic drive characteristic diagram of a fuel pump according to an embodiment of the present invention.
【図４】本発明の一実施例に係る燃料ポンプの燃圧特性
図FIG. 4 is a fuel pressure characteristic diagram of a fuel pump according to an embodiment of the present invention.
【図５】本発明の一実施例に係る燃料ポンプ制御におけ
る基本デューティ較正の説明図FIG. 5 is an explanatory diagram of basic duty calibration in fuel pump control according to an embodiment of the present invention.
【図６】本発明の一実施例に係るインジェクタ駆動パル
スのパルス幅補正における補正パルス幅特性図FIG. 6 is a correction pulse width characteristic diagram in the pulse width correction of the injector drive pulse according to the embodiment of the present invention.
【図７】本発明の一実施例の燃料ポンプ制御を実行する
フローチャートFIG. 7 is a flowchart for executing fuel pump control according to an embodiment of the present invention.
【図８】本発明の他の実施例のシステム図FIG. 8 is a system diagram of another embodiment of the present invention.
２ 燃料ポンプ ３ インジェクタ ４ デリバリパイプ ８ 圧力センサ １０ エンジンコントロールユニット 2 Fuel pump 3 Injector 4 Delivery pipe 8 Pressure sensor 10 Engine control unit
Claims (2)
クタへ供給される燃料の圧力を検出する圧力センサと、
予め設定された燃料ポンプ基本駆動特性に基づいて要求
燃料圧力に応じた燃料ポンプの駆動制御量を設定すると
ともに、前記圧力センサの出力に基づいて前記駆動制御
量を補正し、補正した駆動制御量の駆動信号によって前
記燃料ポンプを制御する駆動制御手段を備えたエンジン
の燃料ポンプ制御装置であって、前記インジェクタによ
る燃料噴射の停止を検出する噴射停止検出手段と、前記
噴射停止検出手段の出力を受け燃料噴射の停止中に前記
駆動制御量を強制的に増大させる制御量増大手段と、前
記制御量増大手段による駆動制御量の強制的な増大に伴
って上昇する燃料圧力の上昇割合を予め設定された標準
値と比較し、前記上昇割合の標準値からのずれ量を燃料
ポンプ駆動特性を判定する判定値として出力する駆動特
性判定手段と、前記駆動特性判定手段の出力を受け、前
記ずれ量に応じて前記基本駆動特性に基づく駆動制御量
の設定値を較正する基本駆動特性値較正手段を備えたこ
とを特徴とするエンジンの燃料ポンプ制御装置。1. A pressure sensor for detecting the pressure of fuel delivered by a fuel pump and supplied to an injector,
The drive control amount of the fuel pump is set according to the required fuel pressure based on the preset fuel pump basic drive characteristic, and the drive control amount is corrected based on the output of the pressure sensor, and the corrected drive control amount is set. A fuel pump control device for an engine, comprising: a drive control means for controlling the fuel pump by a drive signal of, an injection stop detection means for detecting stop of fuel injection by the injector, and an output of the injection stop detection means. A control amount increasing means for forcibly increasing the drive control amount while the received fuel injection is stopped, and an increase rate of the fuel pressure that is increased with the forcible increase of the drive control amount by the control amount increasing means are set in advance. Drive characteristic determination means for comparing the above-mentioned standard value with the standard value and outputting the deviation amount from the standard value of the increase rate as a determination value for determining the fuel pump drive characteristic, A fuel pump control device for an engine, comprising a basic drive characteristic value calibrating means for receiving the output of the drive characteristic determining means and calibrating the set value of the drive control amount based on the basic drive characteristic in accordance with the deviation amount. .
大中のインジェクタの燃料噴射復帰を検出する燃料復帰
検出手段と、前記燃料復帰検出手段の出力を受け、前記
燃料噴射復帰時に前記制御量増大手段による駆動制御量
の増大に伴う燃料圧力の上昇分に応じて前記インジェク
タ駆動の駆動パルスのパルス幅を低減する駆動パルス幅
低減手段を設けた請求項１記載のエンジンの燃料ポンプ
制御装置。2. A fuel return detection means for detecting a fuel injection return of an injector while the drive control amount is being increased by the control amount increase means, and an output of the fuel return detection means to receive the output of the fuel return detection means and increase the control amount at the time of the fuel injection return. 2. The fuel pump control device for an engine according to claim 1, further comprising drive pulse width reducing means for reducing the pulse width of the drive pulse for driving the injector according to an increase in fuel pressure due to an increase in drive control amount by the means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01799893A JP3234998B2 (en) | 1993-01-08 | 1993-01-08 | Engine fuel pump controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01799893A JP3234998B2 (en) | 1993-01-08 | 1993-01-08 | Engine fuel pump controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06200849A true JPH06200849A (en) | 1994-07-19 |
| JP3234998B2 JP3234998B2 (en) | 2001-12-04 |
Family
ID=11959393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01799893A Expired - Fee Related JP3234998B2 (en) | 1993-01-08 | 1993-01-08 | Engine fuel pump controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3234998B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5920004A (en) * | 1997-05-13 | 1999-07-06 | Caterpillar Inc. | Method of calibrating an injector driver system |
| JP2017203417A (en) * | 2016-05-11 | 2017-11-16 | 三菱自動車工業株式会社 | Engine fuel injector |
| KR20180076723A (en) * | 2016-12-28 | 2018-07-06 | 주식회사 현대케피코 | Compensational apparatus and method using deviation of High Pressure Fuel Pump |
-
1993
- 1993-01-08 JP JP01799893A patent/JP3234998B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5920004A (en) * | 1997-05-13 | 1999-07-06 | Caterpillar Inc. | Method of calibrating an injector driver system |
| JP2017203417A (en) * | 2016-05-11 | 2017-11-16 | 三菱自動車工業株式会社 | Engine fuel injector |
| KR20180076723A (en) * | 2016-12-28 | 2018-07-06 | 주식회사 현대케피코 | Compensational apparatus and method using deviation of High Pressure Fuel Pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3234998B2 (en) | 2001-12-04 |
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