JP4074350B2 - Electronic controller for fuel metering in internal combustion engines - Google Patents

Electronic controller for fuel metering in internal combustion engines Download PDF

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Publication number
JP4074350B2
JP4074350B2 JP32370896A JP32370896A JP4074350B2 JP 4074350 B2 JP4074350 B2 JP 4074350B2 JP 32370896 A JP32370896 A JP 32370896A JP 32370896 A JP32370896 A JP 32370896A JP 4074350 B2 JP4074350 B2 JP 4074350B2
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Prior art keywords
internal combustion
amount
fuel metering
combustion engine
control unit
Prior art date
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Expired - Lifetime
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JP32370896A
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Japanese (ja)
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JPH09170470A (en
Inventor
デンツ ヘルムート
モーツ ルードルフ
エーラース ギド
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/04Introducing corrections for particular operating conditions
    • F02D41/06Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/061Introducing corrections for particular operating conditions for engine starting or warming up the corrections being time dependent
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/04Introducing corrections for particular operating conditions
    • F02D41/06Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • F02D41/065Introducing corrections for particular operating conditions for engine starting or warming up for starting at hot start or restart

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、回転数、吸気管中の空気通過量および温度のような動作特性量の信号に基づき燃料調量装置に対する制御信号を形成し、始動時、始動後または暖機運転のように所要燃料の高められた動作時相中、選定可能な関数に従って空気/燃料混合気の濃厚化が低減されるように構成されている、内燃機関における燃料調量用の電子制御装に関する。
【0002】
【従来の技術】
ドイツ連邦共和国特許公告第2522283号により、内燃機関へ供給される燃料/空気混合気の始動時濃厚化および/または始動後濃厚化のための装置が公知である。上記特許第2図によれば、始動後濃厚化係数が時間軸上で直線的に低減調整される。さらに補足的に、内燃機関における種々の動作量に対し比を所望のように整合させることを考慮して、上記の低減調整の全持続時間が回転数と負荷とに依存するようにしている。
【0003】
ドイツ連邦共和国特許出願公開第2511974号公報は、燃料噴射装置においけるコールドスタート作動のための方法および装置に関するものである。そこでは、内燃機関の回転数に関して始動時濃厚化の低減調整が行われている。
【0004】
さらにドイツ連邦共和国特許出願第4308813号明細書(WO94/21909)には、以下のような独自性を有する内燃機関の燃料調量用制御システムが示されている。すなわちこの場合には、始動開始以来、所定数の点火が生じたときに、あるいは始動以降に吸い込まれた空気質量ないし空気量の和が所定の値に達したときに、ラムダ制御が開ループ制御モードから閉ループ制御モードへ切り替えられる。この場合の基本的な着想は、始動以降に内燃機関において所定のエネルギー代謝(成し遂げられた仕事)が生じたときに切り替えを行うことである(請求項3)。補足的に上記の明細書では、閉ループ制御モードへの移行と関連して暖機運転濃厚化係数の低減調整をランプ特性的に時間および/または点火に依存させるようにすることについても言及されている。
【0005】
【発明が解決しようとする課題】
本発明の課題は、既存のシステムをいっそう最適にすることにある。
【0006】
【課題を解決するための手段】
本発明によればこの課題は、濃厚化低減のための関数の個々の低減調整係数は、内燃機関へ供給される空気量の現在の積分値にそのつど依存することにより解決される。
【0007】
次に、図面を参照しながら本発明の実施例について詳細に説明する。
【0008】
【発明の実施の形態】
図1には、本発明の枠内で重要な影響量とともに内燃機関10の概略図が示されている。内燃機関10は排気ガス管11のほかに吸気管12も備えており、この吸気管中に相前後して空気量センサ13、スロットルバルブ14ならびに噴射バルブ15が配置されている。さらに制御装置16は入力信号として、少なくとも空気量センサ13からの信号および入力側17における回転数信号ならびに入力側18における温度信号を受け取る。そして制御装置16は出力側から少なくとも、ただ1つだけ示されている内燃機関の噴射バルブ15ならびに点火装置へ信号を供給する。図1で示した公知の配置構成のもつ役割は、噴射バルブ15を介した燃料調量ならびに点火に関して、内燃機関10の動作を内燃機関の個々の動作特性量に依存して最適な状態におくことである。このことには始動時における所定の始動濃厚化や始動後時相における濃厚化の低減も含まれており、これらは内燃機関の要求にできるかぎり精確に合わせられた関数に従って行われる。
【0009】
冒頭で従来技術による処理に関して説明したように、始動後濃厚化係数を低減するために種々の試みが知られている。殊に、時間軸上での低減調整ならびに回転数に関しての低減調整が挙げられる。
【0010】
本発明によれば、吸入空気量の積分値の関数として低減調整が選定される。このことは図2に概略的なグラフで示されている。この図には燃料/空気の比に関する濃厚化係数が時間軸上に示されており、その際、特別な事例では始動に続く始動後時相だけが重要となる。この始動後時相において濃厚化係数は吸入空気量の積分値の関数として低減され、つまり低減調整係数は始動終了時点ないしは後始動後時相開始時点を起点として ∫QLdt に依存する。
【0011】
このことは図1の制御装置16において、空気量センサ13からの信号を用いながら相応のプログラムステップによって行われる。
【0012】
個々の事例に応じて、積分の開始を始動開始時点または暖機運転開始時点に設定するのも有利である。
【0013】
この場合、積分値の和信号に基づき所望の始動時動作、始動後動作または暖機運転動作に応じた種々異なる低減調整関数を実現することもできる。
【図面の簡単な説明】
【図1】本発明の枠内で重要な影響量とともに内燃機関制御の概観図である。図2にはが示されており、この図面にからがわかる。
【図2】内燃機関の始動後時相中の濃厚化係数の低減調整が吸い込まれた空気量の積分値に依存することを示すグラフである。
【符号の説明】
10 内燃機関
11 排気ガス管
12 吸気管
13 空気量センサ
14 スロットルバルブ
15 噴射バルブ
16 制御装置
[0001]
BACKGROUND OF THE INVENTION
The present invention forms a control signal for the fuel metering device based on signals of operating characteristic quantities such as the number of revolutions, the amount of air passing through the intake pipe and the temperature, and is required at the time of starting, after starting, or during warm-up operation. The present invention relates to an electronic control unit for fuel metering in an internal combustion engine, which is arranged to reduce enrichment of the air / fuel mixture according to a selectable function during an increased operating phase of the fuel.
[0002]
[Prior art]
German Offenlegungsschrift 25 22 283 discloses a device for enrichment at start-up and / or after start-up of a fuel / air mixture supplied to an internal combustion engine. According to FIG. 2 of the above patent, the after-starting thickening coefficient is linearly reduced and adjusted on the time axis. In addition, the total duration of the reduction adjustment is dependent on the rotational speed and the load, taking into account the desired matching of the ratios for the various operating quantities in the internal combustion engine.
[0003]
German Offenlegungsschrift 2511974 relates to a method and device for cold start operation in a fuel injection device. There, a reduction adjustment of the enrichment at start-up is performed with respect to the rotational speed of the internal combustion engine.
[0004]
Further, German Patent Application No. 43088113 (WO94 / 21909) shows a fuel metering control system for an internal combustion engine having the following uniqueness. That is, in this case, when a predetermined number of ignitions have occurred since the start of the start, or when the sum of the air mass or the amount of air sucked after the start reaches a predetermined value, the lambda control is controlled by the open loop control. Switch from mode to closed loop control mode. The basic idea in this case is to perform switching when a predetermined energy metabolism (work accomplished) has occurred in the internal combustion engine since the start (claim 3). In addition, in the above specification, reference is also made to making the reduction adjustment of the warm-up enrichment factor in relation to the transition to the closed-loop control mode dependent on time and / or ignition in terms of lamp characteristics. Yes.
[0005]
[Problems to be solved by the invention]
The object of the present invention is to further optimize existing systems.
[0006]
[Means for Solving the Problems]
According to the invention, this problem is solved by the fact that the individual reduction adjustment factor of the function for the enrichment reduction depends in each case on the current integrated value of the amount of air supplied to the internal combustion engine.
[0007]
Next, embodiments of the present invention will be described in detail with reference to the drawings.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a schematic view of an internal combustion engine 10 together with an important influence amount within the framework of the present invention. The internal combustion engine 10 includes an intake pipe 12 in addition to the exhaust gas pipe 11, and an air amount sensor 13, a throttle valve 14, and an injection valve 15 are arranged in the intake pipe. Further, the control device 16 receives at least a signal from the air amount sensor 13 and a rotation speed signal on the input side 17 and a temperature signal on the input side 18 as input signals. Then, the control device 16 supplies a signal from the output side to at least one injection valve 15 of the internal combustion engine and the ignition device which are shown. The role of the known arrangement shown in FIG. 1 is to optimize the operation of the internal combustion engine 10 with respect to fuel metering and ignition via the injection valve 15 depending on the individual operating characteristic quantities of the internal combustion engine. That is. This includes a predetermined starting enrichment at start-up and a reduction in enrichment in the time phase after start-up, which are performed according to a function that is as precisely as possible matched to the requirements of the internal combustion engine.
[0009]
As described at the beginning with respect to the prior art process, various attempts are known to reduce the thickening factor after start-up. In particular, the reduction adjustment on the time axis and the reduction adjustment with respect to the rotational speed can be mentioned.
[0010]
According to the invention, the reduction adjustment is selected as a function of the integrated value of the intake air amount. This is illustrated by the schematic graph in FIG. In this figure, the enrichment factor for the fuel / air ratio is shown on the time axis, in which case only the post-start time phase following start-up is important in special cases. In the time phase after starting, the enrichment coefficient is reduced as a function of the integral value of the intake air amount, that is, the reduction adjustment coefficient depends on ∫Q Ldt starting from the start end time or the time phase starting time after the post start.
[0011]
This is done by the corresponding program steps in the control device 16 of FIG. 1 using the signal from the air quantity sensor 13.
[0012]
Depending on the individual case, it may also be advantageous to set the start of integration at the start of start or the start of warm-up.
[0013]
In this case, it is possible to realize various reduction adjustment functions corresponding to a desired start-up operation, post-start operation, or warm-up operation based on the sum signal of the integral values.
[Brief description of the drawings]
FIG. 1 is an overview of internal combustion engine control along with important influence quantities within the framework of the present invention. FIG. 2 shows that the figure is clear from this figure.
FIG. 2 is a graph showing that the reduction adjustment of the enrichment coefficient during the time phase after the start of the internal combustion engine depends on the integrated value of the sucked air amount.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Internal combustion engine 11 Exhaust gas pipe 12 Intake pipe 13 Air quantity sensor 14 Throttle valve 15 Injection valve 16 Control apparatus

Claims (3)

回転数、吸気管中の空気通過量および温度のような動作特性量の信号に基づき燃料調量装置に対する制御信号を形成し、始動時、始動後または暖機運転のように所要燃料の高められた動作時相中、選定可能な関数に従って空気/燃料混合気の濃厚化が低減されるように構成されている、内燃機関における燃料調量用の電子制御装置において、
前記関数の個々の低減係数は、内燃機関へ供給される空気量の現在の積分値にそのつど依存することを特徴とする燃料調量用の電子制御装置。
A control signal for the fuel metering device is formed on the basis of signals of operating characteristics such as the rotational speed, the amount of air passing through the intake pipe and the temperature, and the required fuel can be increased at the time of starting, after starting, or during warm-up operation. In an electronic control unit for fuel metering in an internal combustion engine configured to reduce enrichment of the air / fuel mixture according to a selectable function during a different operating time phase,
An electronic control unit for fuel metering, characterized in that the individual reduction factor of the function depends in each case on the current integrated value of the amount of air supplied to the internal combustion engine.
濃厚化低減のための積分値は、始動時、始動時終了ないし始動後または暖機運転の量のうち少なくとも1つが検出されてから形成される、請求項1記載の電子制御装置。The electronic control unit according to claim 1, wherein the integral value for reducing the concentration is formed after at least one of an amount of start, end of start or after start, or warm-up operation is detected. 始動時、始動後または暖機運転の量のうち少なくとも1つの個々の領域に対する積分値に基づき、種々異なる濃厚化係数ないし低減調整係数が形成される、請求項1または2記載の電子制御装置。3. The electronic control unit according to claim 1, wherein different enrichment factors or reduction adjustment factors are formed based on an integral value for at least one individual region of the amount of start-up, after-startup or warm-up operation.
JP32370896A 1995-12-06 1996-12-04 Electronic controller for fuel metering in internal combustion engines Expired - Lifetime JP4074350B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545418A DE19545418C2 (en) 1995-12-06 1995-12-06 Electronic control device for metering fuel in an internal combustion engine
DE19545418.9 1995-12-06

Publications (2)

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JPH09170470A JPH09170470A (en) 1997-06-30
JP4074350B2 true JP4074350B2 (en) 2008-04-09

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JP32370896A Expired - Lifetime JP4074350B2 (en) 1995-12-06 1996-12-04 Electronic controller for fuel metering in internal combustion engines

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IT (1) IT1286393B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19728926C1 (en) * 1997-07-07 1999-01-21 Bosch Gmbh Robert Method of lambda-controlled after-start delay in an internal combustion engine with lambda control
DE10101006A1 (en) * 2001-01-11 2002-07-18 Volkswagen Ag Controlling quantity of fuel delivered during starting of internal combustion engine comprises increasing quantity of fuel delivered by starting quantity increasing factor
DE102006005716A1 (en) * 2006-02-08 2007-08-09 Bayerische Motoren Werke Ag Method for controlling an IC engine in a stop and go programme with a richer mixture during the restart phase to regenerate the catalyser

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511974C3 (en) * 1975-03-19 1980-07-24 Robert Bosch Gmbh, 7000 Stuttgart Method and device for increasing cold start in fuel injection systems for internal combustion engines
DE2522283C3 (en) * 1975-05-20 1981-02-19 Robert Bosch Gmbh, 7000 Stuttgart Device for starting and / or post-starting enrichment of the fuel-air mixture fed to an internal combustion engine and formed by means of an electric fuel injection system
DE2612913C2 (en) * 1976-03-26 1984-11-08 Robert Bosch Gmbh, 7000 Stuttgart Method for warm-up enrichment of the fuel-air mixture supplied to an internal combustion engine and warm-up enrichment circuit
DE4308813A1 (en) * 1993-03-19 1994-09-22 Bosch Gmbh Robert Control system for the fuel metering of an internal combustion engine

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Publication number Publication date
ITMI962418A0 (en) 1996-11-20
DE19545418A1 (en) 1997-06-12
DE19545418C2 (en) 1997-09-18
JPH09170470A (en) 1997-06-30
IT1286393B1 (en) 1998-07-08
ITMI962418A1 (en) 1998-05-20

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