EP0443147B1 - Procédé et dispositif pour réguler/commander la stabilité de marche d'un moteur à combustion interne - Google Patents

Procédé et dispositif pour réguler/commander la stabilité de marche d'un moteur à combustion interne Download PDF

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Publication number
EP0443147B1
EP0443147B1 EP90124327A EP90124327A EP0443147B1 EP 0443147 B1 EP0443147 B1 EP 0443147B1 EP 90124327 A EP90124327 A EP 90124327A EP 90124327 A EP90124327 A EP 90124327A EP 0443147 B1 EP0443147 B1 EP 0443147B1
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EP
European Patent Office
Prior art keywords
loop
closed
control
smooth
running
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
EP90124327A
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German (de)
English (en)
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EP0443147A3 (en
EP0443147A2 (fr
Inventor
Wolf Wessel
Thomas Dipl.-Ing. Küttner
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 EP0443147A2 publication Critical patent/EP0443147A2/fr
Publication of EP0443147A3 publication Critical patent/EP0443147A3/de
Application granted granted Critical
Publication of EP0443147B1 publication Critical patent/EP0443147B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/16—Introducing closed-loop corrections for idling
    • 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
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine
    • F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1015—Engines misfires

Definitions

  • the invention relates to a method and a device for regulating / controlling the smooth running of an internal combustion engine according to the preambles of the independent claims.
  • Such a method and such a device for regulating / controlling the smooth running of an internal combustion engine is known from GB-A 21 73 925. There, a method and a device for regulating / controlling the smooth running of an internal combustion engine are described. The cylinder-specific control is switched off when the control deviation exceeds a limit.
  • vibrations are also known as shaking and are based, among other things, on manufacturing tolerances. These manufacturing tolerances mean that different quantities are metered into individual cylinders. In the devices according to the state of the art, these vibrations are eliminated by assigning a control to each cylinder, which regulates the fuel metering for smooth running.
  • vibrations occur which cannot be compensated for by a method and a device according to the prior art. It is even the case that the vibrations can be amplified by the smooth running control.
  • the invention is based, to eliminate all vibrations occurring in a system for regulating / controlling the smooth running of an internal combustion engine of the type mentioned. This object is achieved by the features characterized in claims 1 and 8, respectively.
  • FIG. 1 shows schematically a fuel metering device.
  • FIG. 2 shows the individual areas in which the smooth running control or control is active.
  • FIG. 3 shows a rough flow diagram of the method according to the invention.
  • Figures 4a and 4b show a detailed flow chart.
  • Figure 5 various signal profiles are entered in a diagram.
  • the fuel metering device is shown schematically in FIG.
  • An internal combustion engine 10 with a plurality of cylinders receives fuel from a fuel pump 20.
  • An electronic control device 30 calculates control signals for the fuel pump 20 depending on various input variables 35 and the output signals of a sensor 40.
  • a sensor 40 detects the pulses triggered by a segment wheel 50 arranged on the crankshaft.
  • the torque generated by the internal combustion engine is transmitted directly or via a two-mass flywheel 60 to the drive train 70 of the motor vehicle.
  • the electronic control unit 30 calculates a basic fuel quantity and a correction fuel quantity depending on various variables 35.
  • the function of the electronic control unit 30 is e.g. described in detail in DE-OS 36 04 904 or in DE-OS 33 36 028.
  • the correction fuel quantities are continuously determined, stored and added to the basic fuel quantity in the corresponding cylinder.
  • the amount of correction fuel can take positive or negative values.
  • the smoothness is controlled, the correction fuel quantities for the individual cylinders are no longer recalculated. In this case, the stored values are added to the basic fuel quantity.
  • the smooth running control is only activated in idle mode. Outside of idling there is a smooth running control or the fuel metering takes place independently of the smooth running. These different areas are shown by way of example in FIG. 2a and FIG. 2b.
  • the idle speed control is active in the area of the idling speed LLN, whose value is usually around 700 revolutions per minute. Regulation takes place only in a speed range between approx. 550 and 850 revolutions per minute. In the remaining speed ranges, only smooth running is controlled.
  • the smooth running program no longer has any advantages above this limit speed. This is usually the case at around 1,500 revolutions per minute.
  • other operating parameters can be used instead of the speed.
  • a quantity is, for example, the amount of fuel injected per stroke.
  • the smooth running control is only active with an injected fuel quantity between 3 mg / stroke and 11 mg / stroke.
  • the areas in which the smooth running control is active depend on the idling speed. Since different types of internal combustion engines also have different idling speeds, the ranges deviate from the above values depending on the type of internal combustion engine.
  • vibrations with a very high amplitude and / or certain frequencies occur in the motor vehicle internal combustion engine system, the case may arise that these vibrations cannot be compensated for by the smooth running control. This is particularly the case if the vehicle is equipped with a dual mass flywheel. This dual mass flywheel has different resonance frequencies depending on the operating conditions. If these resonance frequencies are excited, these vibrations are transmitted to the entire motor vehicle internal combustion engine system. If these vibrations have a frequency F which is equal to the crankshaft frequency or 1.5 times the crankshaft frequency, these vibrations disturb the smooth-running controller. For example, the case that the amount of correction fuel is continuously increased, although this is not currently necessary. The vibrations are amplified by the increased correction quantities. In this case, the smooth running control must be switched off.
  • FIG. 3 shows a rough flow diagram of the method according to the invention, with which such vibrations can be avoided.
  • a first step / 310 the oscillation frequency F or the control difference DN, ie the difference between the setpoint and actual value, is recorded.
  • An interrogation unit 320 recognizes whether the control difference DN or the oscillation frequency F exceeds a certain value.
  • the smooth running controller is switched off in step 330. This means that the smoothness control is no longer active, but only smoothness control takes place.
  • two time counters VZ1 and VZ2 are initialized. In the query unit 340, the first time counter VZ1 is used to query whether a waiting time has already expired. This time query ensures that further measures are taken if the vibrations last longer than a predetermined time.
  • step 360 further measures are initiated in step 360.
  • measures can include increasing the idle speed, zeroing the integrators of the PI controller or deleting the stored correction amounts.
  • a speed increase between 50 and 100 revolutions per minute has proven to be a favorable value. This increase in speed can bring the system out of the resonance range. If crankshaft frequencies no longer occur, the idle speed is set to the previous value.
  • query 370 is used to check whether the control has been switched off until now.
  • the program ends with step 350.
  • an inquiry 380 is made as to whether a further waiting time VZ2 has elapsed. If this waiting time has already expired, the controller is switched on again in step 390. If the waiting time has not yet expired, the program continues with the controller switched off. Due to this further waiting time a too quick switch back from control to regulation operation prevented. The switch from control to regulating operation takes place only after the waiting time VZ2 or after a number of speed pulses, after the control difference DN or the oscillation frequency falls below a certain value again.
  • step 400 the smoothness target values and the smoothness actual values are calculated. This calculation is e.g. B. in DE-OS 33 36 028 or in DE-OS 36 04 904 described in detail.
  • the control difference DN is then determined on the basis of these values.
  • step 402 the change in control difference DDN is then determined from the current and the previous value of the control difference DN. Based on this change in control difference, the amount DDNB and the sign DDNV are calculated.
  • step 404 a query is made as to whether the segment counter SZ has reached a specific value X. The counting process of the frequency counter FZ is started for a certain number of segments, in our example 2, and stopped again the next time the same number of segments (2) occurs.
  • step 418 the program is continued with step 418 or point A. If the segment counter SZ has reached the predetermined value X, this means that two crankshaft revolutions have passed, then an inquiry 406 is made as to whether the frequency counter FZ is greater than or equal to 4. If this is not the case, the program continues with step 418 or at point A. If the frequency counter FZ assumes the value 4 or a larger value, the control counter SW is set to B in step 408. In query 410 it is then checked whether the frequency counter has the value 4 or 5. If this is not the case, the Idle counter NLL 0 set step 412. If the frequency counter FZ has the value 4 or 5, the idle counter NLL is set to 1 step 414. Steps 412 and 414 are followed by step 416, in which the frequency counter FZ goes back to zero is reset.
  • a check is carried out to determine whether the change in control difference DDN is greater than a threshold S. If the change in control deviation does not exceed the threshold, the program continues with step 428. If the change in control deviation is greater than the threshold, a query is made in 420 as to whether the frequency counter is 0. If this is the case, then in step 422 the frequency counter is set to 1, the sign of the frequency counter VZZ is set to the sign of the change in control deviation DDNV. If the frequency counter is not equal to 0, a query is made in step 424 as to whether the sign of the frequency counter VZZ is equal to the sign of the current control difference DDNV. If the sign of the change in control deviation has not changed, the computer jumps to step 428.
  • step 426 Steps 422, 426 and 424 are followed by step 428.
  • the control counter is reduced by 1.
  • inquiry 430 it is checked whether the control counter is 0. If this is not the case, then step 432 switches over to smooth running control.
  • step 434 If the control counter is 0, it is set to 1 in step 434. Inquiry 436 a check is made as to whether it is necessary to switch to smooth running control for other reasons. This is e.g. B. the case when the speed is outside the idle range. In this case, the control counter is set to B in step 440. If query 436 recognizes that there are no requests for smooth running control, then step 438 switches to smooth running control.
  • FIG. 5a Various counter values and the control difference DN are entered in a diagram in FIG.
  • the values which the segment counter SZ assumes are shown in FIG. 5a.
  • the measuring range MB is determined by means of this count.
  • the measuring range begins at a certain value of the segment counter SZ, in this example at the value 2.
  • the measuring range ends when the segment counter assumes the same value (2) again.
  • the segment counter in a six-cylinder internal combustion engine runs from the value 12 to the value 1. It counts the impulses triggered by the segment degree arranged on the crankshaft. In this example, the counting process runs over two engine revolutions. This means that 12 pulses occur in the course of two crankshaft revolutions.
  • the control difference DN is plotted in FIG. 5b. Changes to the control difference that lead to an increase in the frequency counter are marked with arrows. Each time the control difference changes, the certain conditions are met, as shown in FIG. 5c, the frequency counter FZ is increased by one.
  • the frequency counter is only increased if the change in control deviation exceeds a certain threshold and at the same time the sign of the change in control difference changes.
  • the control difference A1 changes, both conditions are met, therefore the frequency counter increases by one.
  • the control difference changes by a certain amount, but since its sign does not change, the frequency counter retains its old value.
  • the smooth running control only works when external disturbances which cause vibrations have subsided.
  • Such disorders can e.g. B. caused by resonance vibrations of a two-mass flywheel, an accelerator pedal or clutch pedal actuation when a gear is engaged.
  • a switchover from regulation to control takes place immediately. Detuning of the integrators can thereby be prevented.

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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)

Claims (8)

  1. Procédé pour la régulation/commande de la stabilité de marche d'un moteur à combustion interne, procédé dans lequel une différence de réglage (DN) est déterminée en fonction d'une valeur de consigne et d'une valeur réelle, tandis que selon les conditions de fonctionnement, il en résulte une régulation de la stabilité de marche, ou bien une commande de la stabilité de marche, procédé caractérisé en ce que la régulation de la stabilité de marche est déconnectée lorsqu'une fréquence d'oscillation (F) de la différence de réglage (DN) atteint une valeur limite.
  2. Procédé selon la revendication 1, caractérisé en ce que la régulation de la stabilité de marche n'est à nouveau connectée que lorsque la fréquence d'oscillation (F) descend à nouveau au-dessous d'une valeur déterminée et qu'un temps d'attente s'est écoulé.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la fréquence d'oscillation de la différence de réglage est détectée au moyen d'un compteur de fréquences.
  4. Procédé selon la revendication 3, caractérisé en ce qu'une augmentation du compteur de fréquences ne s'effectue que lorsque la variation de la différence de réglage dépasse un seuil déterminé et que, simultanément, le signe de cette variation de la différence de réglage change.
  5. Procédé selon l'une au moins des revendications 1 à 4, caractérisé en ce que lorsque la régulation de stabilité de marche est déconnectée au-delà d'un laps de temps prédéfini, on prend l'une au moins des dispositions comprenant l'élévation de la vitesse de rotation de ralenti de consigne, la mise à zéro des intégrateurs du régulateur PI, ou bien l'effacement des quantités de correction mémorisées.
  6. Procédé selon la revendication 5, caractérisé en ce que la vitesse de rotation de ralenti de consigne est augmentée de 50 à 100 tours par minute.
  7. Procédé selon l'une des précédentes revendications, caractérisé en ce que la quantité de carburant de correction déterminée lors d'une régulation active de la stabilité de marche, est mémorisée et ajoutée à la quantité de carburant de base lors du dosage dans le cylindre correspondant.
  8. Dispositif pour la régulation/commande de la stabilité de marche d'un moteur à combustion interne, dispositif dans lequel, selon les conditions de fonctionnement, une régulation de la stabilité de marche ou une commande de la stabilité de marche, sont actives, tandis qu'on prévoit des moyens pour détecter une différence de réglage, dispositif caractérisé en ce qu'on prévoit des moyens qui, dans le cas où la fréquence d'oscillation de la différence de réglage atteint une valeur limite, déconnectent la régulation de la stabilité de marche.
EP90124327A 1990-02-23 1990-12-15 Procédé et dispositif pour réguler/commander la stabilité de marche d'un moteur à combustion interne Expired - Lifetime EP0443147B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4005735A DE4005735A1 (de) 1990-02-23 1990-02-23 Verfahren und einrichtung zur regelung/steuerung der laufruhe einer brennkraftmaschine
DE4005735 1990-02-23

Publications (3)

Publication Number Publication Date
EP0443147A2 EP0443147A2 (fr) 1991-08-28
EP0443147A3 EP0443147A3 (en) 1992-01-15
EP0443147B1 true EP0443147B1 (fr) 1993-11-18

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EP90124327A Expired - Lifetime EP0443147B1 (fr) 1990-02-23 1990-12-15 Procédé et dispositif pour réguler/commander la stabilité de marche d'un moteur à combustion interne

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US (1) US5101791A (fr)
EP (1) EP0443147B1 (fr)
JP (1) JP3286638B2 (fr)
DE (2) DE4005735A1 (fr)

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KR101192899B1 (ko) 2002-11-13 2012-10-18 데카 프로덕츠 리미티드 파트너쉽 가압 증기 사이클 액체 증류
US11826681B2 (en) 2006-06-30 2023-11-28 Deka Products Limited Partneship Water vapor distillation apparatus, method and system
EP2158161B1 (fr) 2007-06-07 2020-04-01 DEKA Products Limited Partnership Appareil de distillation de vapeur de fluide
US11884555B2 (en) 2007-06-07 2024-01-30 Deka Products Limited Partnership Water vapor distillation apparatus, method and system
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WO2014018896A1 (fr) 2012-07-27 2014-01-30 Deka Products Limited Partnership Commande de la conductivité dans une sortie d'eau de production destinée à un évaporateur
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Also Published As

Publication number Publication date
DE4005735A1 (de) 1991-08-29
US5101791A (en) 1992-04-07
JPH04219443A (ja) 1992-08-10
EP0443147A3 (en) 1992-01-15
DE59003552D1 (de) 1993-12-23
EP0443147A2 (fr) 1991-08-28
JP3286638B2 (ja) 2002-05-27

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