EP0702137B1 - Méthode et dispositif pour ajuster le ralenti d'un moteur à combustion - Google Patents

Méthode et dispositif pour ajuster le ralenti d'un moteur à combustion Download PDF

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Publication number
EP0702137B1
EP0702137B1 EP95112418A EP95112418A EP0702137B1 EP 0702137 B1 EP0702137 B1 EP 0702137B1 EP 95112418 A EP95112418 A EP 95112418A EP 95112418 A EP95112418 A EP 95112418A EP 0702137 B1 EP0702137 B1 EP 0702137B1
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EP
European Patent Office
Prior art keywords
rotational speed
combustion engine
engine
internal combustion
idling
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.)
Expired - Lifetime
Application number
EP95112418A
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German (de)
English (en)
Other versions
EP0702137A2 (fr
EP0702137A3 (fr
Inventor
Claus-Dieter Nusser
Helmut Sperling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0702137A2 publication Critical patent/EP0702137A2/fr
Publication of EP0702137A3 publication Critical patent/EP0702137A3/fr
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Publication of EP0702137B1 publication Critical patent/EP0702137B1/fr
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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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • F02D41/086—Introducing corrections for particular operating conditions for idling taking into account the temperature of the engine

Definitions

  • the invention relates to a method and a device for idle adjustment of an internal combustion engine.
  • the operating state can be achieved by the procedure according to the invention Hot idling can be mastered satisfactorily.
  • the procedure according to the invention enables a Increase the idle speed if the oil pressure is too low are threatening. It is particularly advantageous that the invention Procedure of exceeding an oil temperature threshold shows above which the oil pressure is too low threatens to occur without an oil temperature sensor is used..
  • For the rise in oil temperature is the time that the engine is operated at high speeds, essential advantageously exceeding the oil temperature threshold on the basis of one formed from the speed Time span, engine temperature and intake air temperature estimated.
  • this Time span the time for which the motor runs at a speed is operated above a limit speed. It is advantageous to take into account the time for which the engine with a speed below a limit speed is operated.
  • a major advantage is that the simulation of the Oil temperature no cables and pins provided on the control unit must also be no evaluation circuits and Evaluation programs for the oil temperature sensor signal in the Engine control unit are necessary.
  • Figure 1 is an overview block diagram of the invention Procedure
  • Figure 2 is a flow chart for implementation the procedure according to the invention as a computer program is outlined.
  • FIG. 1 shows a control unit 10, which has an output line 12 among others, for reasons of clarity Functions not shown such as fuel metering and Ignition adjustment on at least the idle air Internal combustion engine adjusting actuator 14 is actuated.
  • the control unit 10 is connected via the input lines 16 to 18 with measuring devices 20 to 22 for recording operating variables of internal combustion engine and / or vehicle, via the input line 24 with a measuring device 26 for detection the engine temperature (cooling water temperature), via a Line 28 with a measuring device 30 for detecting the Intake air temperature and via a line 32 with a measuring device 34 connected to the detection of the engine speed.
  • the input lines 16 to 18 lead to a setpoint formation unit 36, whose output line 38 to a switching element 40 leads.
  • a line 42 leads from the switching element 40 to a controller unit 44, which via a line 46 Engine speed is supplied. Output line of the controller unit 44 is the line 12.
  • the line 24 leads on the one hand to a threshold level 48, on the other hand to another Threshold level 50.
  • Line 28 also leads on the one hand to a threshold level 52, on the other hand to a threshold level 54, the line 32 to a threshold level 56 and to a threshold level 58.
  • the output line 60 of the Threshold level 56 leads to the incrementing input 62 of a counting means 64, the output line 66 of the threshold level 58 to the decrementing input 68, the counting means 64.
  • the output line 70 of the counting means 64 leads on the one hand to a threshold 72, on the other hand to one another threshold level 74.
  • the output line 76 of the Threshold level 52, the output line 78 of the threshold level 48 and the output line 80 of the threshold 72 lead to a logic AND gate 82, the output line 84 to the set input 86 of a flip-flop function performing element 88 is performed.
  • the output line 90 of the threshold level 50, the output line 92 of the Threshold level 54 and the output line 94 of the Threshold value stage 74 lead to a logical OR gate 96, whose output line 98 to the reset input 100 of the Elements 88 is guided.
  • the element output line 102 88 leads to the switching means 40.
  • an idle speed setpoint NSet which is from the controller unit, for example a PID controller, comparing with the actual speed set by actuating the control element 14 becomes.
  • the switching means 40 under the conditions described below Position shown in dashed lines and the idle speed based on the for this operating condition provided setpoint.
  • the changeover signal is formed when the engine temperature and the intake air temperature above predetermined Limit values lie and - in the simplest case - the motor for a predetermined time at a speed above one Limit speed is operated. It is a preferred Embodiment the time the engine is below the limit speed is operated, taken into account and so as a supplementary criterion, the oil cools down when the temperature falls below the limit speed by subtracting this time.
  • the counting means 64 is initialized, preferably to the Value 0 set. If the actual speed exceeds that in the Threshold value 56 predetermined limit value (e.g. 4000 Rev./min), the counting value of the counting means becomes regular Time intervals (e.g. 10 sec) incremented, preferably increased by 1. If the actual speed falls below that in the Threshold value 58 predetermined limit value, which is preferably with the limit value specified in the threshold value stage 56 is identical, the count value of the counting means 64 in decremented at regular intervals (e.g. 10 sec), preferably decreased by 1.
  • the Threshold value 56 predetermined limit value e.g. 4000 Rev./min
  • the counting value of the counting means becomes regular Time intervals (e.g. 10 sec) incremented, preferably increased by 1. If the actual speed falls below that in the Threshold value 58 predetermined limit value, which is preferably with the limit value specified in the threshold value stage 56 is identical, the count value of the counting means 64 in decremented at regular interval
  • the count Z thus formed becomes delivered via line 70 and at predetermined times permanently stored in storage element 110.
  • the count value Z is a measure of one of the Engine speed depending on the duration of the engine load. The length of time is determined from the time for which the speed is predetermined Has exceeded threshold values, reduced by the Time for which the machine was operating below the limit becomes. So it represents a measure of the time for which the engine is operated at high speed. To be noted is that the count value is at a minimum and maximum value is limited.
  • Exceed all three farm sizes the predefined threshold value is generated by the logical one AND gate 82 a corresponding element 88 setting signal via line 64. Changes accordingly element 88 has its output signal level on line 102 and leads to the switching of the switching means 40.
  • the operating state Hot idling is therefore recognized when the engine temperature, the intake air temperature predetermined Threshold values exceed as well as the speed for a certain Time was above a threshold.
  • Words is the length of time for which the speed is above the limit speed, compared to a threshold, which depend on the history of the temporal speed curve is.
  • Examples of the limit values in one exemplary embodiment are 4800 rpm for the speed, 100 ° C for the engine, 60 ° C for the intake air temperature.
  • the Limit value is, for example, at a constantly high speed reached after 15 min.
  • the counting range of the counting means 64 is limited by maximum and minimum values and that a Set the operating state hot idling only outside the Start phases can be made.
  • the element 88 is with reset each time the engine is started by one to create a defined starting point.
  • the respective threshold value level If the operating variables shown below the cooling water temperature, Intake air temperature and count value in the Threshold levels 50, 54 and 74 predetermined threshold values, the respective threshold value level generates a corresponding one Signal levels on lines 90, 92 and 94.
  • the logical OR gate 96 then generates an output signal on the line 88, which for resetting the element 88 and Switching the switching means 40 in the solid position leads if at least one of the specified farm sizes falls below the predetermined threshold. Then the Operating state hot idling recognized as finished.
  • FIG. 2 shows a flow chart of the procedure according to the invention as an implementation example in the context of a computer program.
  • the part of the program shown in FIG called at predetermined times. In one embodiment the call of the Proven part of the program every 10 seconds.
  • the counter value Z is set to 0 according to step 202. If there is no initial start condition, the saved one is saved Counter value Z loaded in step 201.
  • cooling water temperature Tmot, engine speed Nest and intake air temperature TANS read and in the subsequent query step 206 asked whether the Actual engine speed exceeded a predetermined threshold value N0 Has.
  • step 208 the Counter incremented, i.e. increased by 1, and possibly in subsequent step 210 is limited to its maximum value Zmax. If the engine speed is less than or equal to the specified one Threshold value N0, the counter is decremented in step 212, that is, the count value Z decreased by 1 and im subsequent step 214, if necessary, to the minimum value Zmin limited. It is then checked in query step 216 whether the cooling water temperature exceeded a threshold Tmot0 the intake air temperature has a threshold value TANS0 has exceeded and the counter value is greater than a counter threshold value Z0 is. All of these conditions lie simultaneously before, in step 218 a mark for the operating state of the hot idling set.
  • step 218 the idle speed control means that the idle speed setpoint NSet by the one specified for this operating state Setpoint Nset hot is replaced.
  • step 218 the present counter value is permanently stored in step 220 and the program part ends.
  • step 216 found that the three conditions are not simultaneous are present, it is checked in query step 222 whether the Cooling water temperature less than a threshold (Tmot0 - deltal) or the intake air temperature is less than one Threshold (TANS0 - delta2) or the count Z less than is a predetermined threshold (Z0 - delta3). Is this not the case, the current operating status of the Nothing changed in the internal combustion engine, so that with step 220 and the storage of the count value Z is continued.
  • Tmot0 - deltal a threshold
  • TANS0 - delta2 Threshold
  • Z0 - delta3 a predetermined threshold
  • step 224 leaving the operating state becomes hot idling or the normal operating status of the idle control recognized and the hot idling mark changed accordingly or kept at their previous value. This leads to the program the idle speed control to that of operating variables dependent idle speed setpoint NSet the Regulation is taken as a basis. After step 224 the Count value saved and the program part ended.
  • the operating state Hot idling is detected when the engine temperature and the intake air temperature and the length of time for which the Speed was above a limit speed, in each case exceed predetermined threshold values.
  • the operating status Hot idling is not recognized or considered abandoned, if the engine temperature or the intake air temperature or the time period below predetermined threshold values lie.
  • Hot idle is recognized if, for example in the presence of the other conditions, the Speed is above the threshold for a long time a hysteresis is provided for the threshold values avoid constant switching.

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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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Exhaust Gas After Treatment (AREA)

Claims (11)

  1. Procédé pour régler le ralenti d'un moteur thermique, selon lequel, lorsque le moteur est chaud, on augmente le régime de ralenti,
    caractérisé en ce qu'
    on considère que le moteur thermique atteint l'état de fonctionnement chaud lorsqu'on dépasse un seuil de température d'huile pour lequel la pression d'huile peut devenir trop basse.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    le dépassement du seuil de température d'huile est accepté si la température du moteur, la température de l'air aspiré et la durée pendant laquelle le moteur a tourné à un régime au-dessus d'une vitesse limite, ont dépassé des seuils prédéfinis.
  3. Procédé selon la revendication 2,
    caractérisé en ce que
    la durée pendant laquelle le régime se trouve en dessous du seuil de régime de sorte que l'huile se refroidit, est retranchée de la durée pendant laquelle le moteur a fonctionné à un régime supérieur à un seuil de régime.
  4. Procédé selon la revendication 2,
    caractérisé en ce que
    pour déterminer le critère de régime, on incrémente un état de comptage et, lorsqu'on passe en dessous du régime de seuil, on décrémente l'état de comptage.
  5. Procédé selon la revendication 4,
    caractérisé en ce qu'
    on considère l'état de fonctionnement avec un moteur thermique chaud si l'état de comptage dépasse un certain seuil et si la température du moteur et la température de l'air aspiré dépassent certains seuils.
  6. Procédé selon l'une quelconque des revendications 2, 3 ou 4,
    caractérisé en ce qu'
    on considère que l'on n'a pas atteint ou que l'on a quitté l'état de fonctionnement correspondant à un moteur thermique chaud si la température du moteur ou la température de l'air aspiré ou encore la durée du dépassement du seuil de régime ou l'état de comptage, passent en dessous de certains seuils prédéterminés.
  7. Procédé selon la revendication 4,
    caractérisé en ce qu'
    on mémorise en permanence, de façon intermédiaire, l'état de comptage et, après le démarrage du moteur thermique, on prend comme point de départ l'état de comptage mémorisé de façon intermédiaire.
  8. Procédé selon la revendication 4,
    caractérisé en ce que
    lors de la première mise en route de l'unité de commande ou après sa mise en route après débranchement de l'alimentation électrique, on met l'état de comptage à une valeur prédéterminée, de préférence 0.
  9. Procédé selon la revendication 1,
    caractérisé en ce qu'
    à l'état de ralenti, lorsqu'on a reconnu que le moteur thermique était à l'état chaud, on augmente le régime de ralenti et, en quittant l'état de fonctionnement, on abaisse le régime.
  10. Procédé selon la revendication 9,
    caractérisé en ce qu'
    on abaisse le régime au cours du cycle de ralenti suivant.
  11. Dispositif pour régler le ralenti d'un moteur thermique à l'aide d'une unité de commande qui augmente le régime de ralenti lorsque le moteur thermique est chaud,
    caractérisé par
    des moyens qui considèrent que l'état de fonctionnement avec un moteur thermique chaud, est atteint lorsqu'on dépasse un seuil de température d'huile pour lequel la pression d'huile peut devenir trop basse.
EP95112418A 1994-09-19 1995-08-08 Méthode et dispositif pour ajuster le ralenti d'un moteur à combustion Expired - Lifetime EP0702137B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4433300A DE4433300C1 (de) 1994-09-19 1994-09-19 Verfahren und Vorrichtung zur Leerlaufeinstellung einer Brennkraftmaschine
DE4433300 1994-09-19

Publications (3)

Publication Number Publication Date
EP0702137A2 EP0702137A2 (fr) 1996-03-20
EP0702137A3 EP0702137A3 (fr) 1998-09-16
EP0702137B1 true EP0702137B1 (fr) 2001-12-19

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ID=6528568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95112418A Expired - Lifetime EP0702137B1 (fr) 1994-09-19 1995-08-08 Méthode et dispositif pour ajuster le ralenti d'un moteur à combustion

Country Status (5)

Country Link
US (1) US5605128A (fr)
EP (1) EP0702137B1 (fr)
JP (1) JPH08114145A (fr)
DE (1) DE4433300C1 (fr)
ES (1) ES2170113T3 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5806486A (en) * 1997-10-06 1998-09-15 Ford Global Technologies, Inc. Automative engine idle speed control
US6067959A (en) * 1997-10-31 2000-05-30 Navistar International Transportation Corp. Electronic engine control for regulating engine coolant temperature at cold ambient air temperatures by control of engine idle speed
DE19831515A1 (de) * 1998-07-14 2000-01-20 Bayerische Motoren Werke Ag Betriebsverfahren für eine Fahrzeugkraftmaschine
WO2002083609A1 (fr) * 2001-04-12 2002-10-24 Basf Aktiengesellschaft Procede de preparation de propylene
US7204230B2 (en) * 2005-06-01 2007-04-17 Ford Global Technologies, Llc Vehicle and method for controlling an engine
JP4508011B2 (ja) * 2005-06-30 2010-07-21 トヨタ自動車株式会社 内燃機関の制御装置
US9121359B2 (en) * 2012-12-14 2015-09-01 Fca Us Llc Stepped idle return for multiair equipped engines with high aeration
SE540707C2 (sv) * 2017-02-28 2018-10-16 Scania Cv Ab Förfarande och datorprogramprodukt för att förbättra prestanda hos ett motorfordon
US11022010B2 (en) * 2017-12-22 2021-06-01 Ford Global Technologies, Llc Engine variable oil pump diagnostic method
JP6964111B2 (ja) * 2019-03-28 2021-11-10 ヤンマーパワーテクノロジー株式会社 エンジン
CN115355100B (zh) * 2022-09-22 2024-01-16 潍柴动力股份有限公司 发动机冷启动控制方法、装置、发电机组及存储介质

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2053508B (en) * 1979-05-22 1983-12-14 Nissan Motor Automatic control of ic engines
JPS55160137A (en) * 1979-05-29 1980-12-12 Nissan Motor Co Ltd Suction air controller
US4393834A (en) * 1980-12-15 1983-07-19 Texas Instruments Incorporated Two-temperature thermally responsive fast idle control switch
JPS6232239A (ja) * 1985-08-02 1987-02-12 Mazda Motor Corp エンジンの吸気装置
US4688534A (en) * 1985-08-23 1987-08-25 Toyota Jidosha Kabushiki Kaisha Idling speed control device of an internal combustion engine
KR900001627B1 (ko) * 1986-05-12 1990-03-17 미쓰비시전기 주식회사 내연기관의 아이들회전수 제어장치
JP2632015B2 (ja) * 1988-08-01 1997-07-16 本田技研工業株式会社 エンジンルーム内冷却制御方法
JP2847142B2 (ja) * 1989-05-18 1999-01-13 富士重工業株式会社 エンジンのアイドル回転数制御装置

Also Published As

Publication number Publication date
ES2170113T3 (es) 2002-08-01
JPH08114145A (ja) 1996-05-07
EP0702137A2 (fr) 1996-03-20
EP0702137A3 (fr) 1998-09-16
US5605128A (en) 1997-02-25
DE4433300C1 (de) 1995-11-09

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