EP0222775B1 - Procede pour regler la vitesse a vide d'un moteur a combustion interne - Google Patents

Procede pour regler la vitesse a vide d'un moteur a combustion interne Download PDF

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Publication number
EP0222775B1
EP0222775B1 EP86900735A EP86900735A EP0222775B1 EP 0222775 B1 EP0222775 B1 EP 0222775B1 EP 86900735 A EP86900735 A EP 86900735A EP 86900735 A EP86900735 A EP 86900735A EP 0222775 B1 EP0222775 B1 EP 0222775B1
Authority
EP
European Patent Office
Prior art keywords
throttle valve
speed
internal combustion
combustion engine
process according
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
Application number
EP86900735A
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German (de)
English (en)
Other versions
EP0222775A1 (fr
Inventor
Rüdiger Jautelat
Rolf Kohler
Cornelius Peter
Günther PLAPP
Martin Stilling
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 EP0222775A1 publication Critical patent/EP0222775A1/fr
Application granted granted Critical
Publication of EP0222775B1 publication Critical patent/EP0222775B1/fr
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/002—Electric control of rotation speed controlling air supply
    • F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
    • F02D31/004—Electric control of rotation speed controlling air supply for idle speed control by controlling a throttle stop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Definitions

  • the invention relates to a method for controlling the idle speed of an internal combustion engine according to claim 1, first part.
  • a throttle valve switch is connected to the throttle valve, which indicates the idle position of the throttle valve, and an electrically adjustable cam is provided, by means of which this idle position, and thus the position of the throttle valve, can be changed.
  • the said cam is influenced as a function of the idle position of the throttle valve and the speed of the internal combustion engine.
  • the invention has the advantage that fluctuations in the idling speed are optimally suppressed. This is achieved by the features from claim 1, second part in a method according to claim 1, first part.
  • the particular position of the throttle valve is the stop of the throttle valve in the idle position.
  • the throttle valve can be adjusted by adjusting this stop.
  • the change in the position of the throttle valve is further made dependent on at least one of the following conditions, namely that the overrun cutoff is not switched on, that the engine is not cold, that the engine is not too hot, and that a certain, predeterminable period of time has passed since the throttle valve was last changed. This ensures that the operating state of idling is reliably recognized and that special operating conditions of the engine can also be taken into account.
  • FIG. 1 shows a simplified block diagram of the invention
  • FIG. 2 shows a flow diagram of the method according to the invention, which can be implemented with the aid of the device according to FIG.
  • the exemplary embodiment described below can be used in connection with internal combustion engines, in particular in connection with gasoline internal combustion engines.
  • the exemplary embodiment is described in the form of a flow chart, but it is also possible to carry out the entire implementation with the aid of a corresponding e.g. to realize analog electrical circuit.
  • an electronic control unit 10 generates an output signal as a function of several input signals, which controls an adjustable throttle valve stop 13 of a throttle valve 12 arranged in the intake pipe 11 of an internal combustion engine.
  • a throttle valve potentiometer 14 coupled to this throttle valve 12 and by means of the throttle valve stop 13, signals are generated which are supplied to the electronic control unit 10 as input signals and which serve as feedback signals for the position of the throttle valve 12 in the intake pipe 11 of the internal combustion engine.
  • FIG. 2 shows a flow diagram of the method according to the invention, with the aid of which the change in the throttle valve stop is brought about, and which can be implemented with the aid of the device according to FIG. 1.
  • the reference numbers 34 and 35 in FIG. 2 identify the start and end of the method according to the invention. This means that the flow chart shown in Figure 2 e.g. is started in a fixed time grid or depending on certain circumstances or occasions.
  • the decision block 20 following the start block 34, it is first checked whether a specific, predeterminable time has already passed since the throttle valve was last influenced by the method according to the invention. If this is not the case, the process is ended directly via the end block 35. If the time has passed, however, it is checked in the subsequent decision block 21 whether the throttle valve is closed. This check is e.g. by means of the throttle valve stop 13, which e.g. delivers an output signal to the electronic control unit 10 only when the throttle valve is closed. In the negative case, as in decision block 20, the method according to the invention is ended, while in the positive case, that is to say with the throttle valve closed, the method is continued with decision block 22. There it is checked whether the fuel cut-off is switched off.
  • the method is ended again; on the other hand, if the overrun fuel cutoff is switched off, the following decision blocks 23 and 24 check whether certain temperature conditions are met. In block 23 it is checked whether the engine temperature is greater than e.g. Is 80 ° C, whereas in block 24 it is checked whether the intake air temperature is lower than e.g. 60 ° C. If one of the two tests gives a negative result, the method is ended, as already mentioned, but if the result is positive, the method is continued in each case, namely after block 24 with decision block 25. There the difference between calculates the current and the last measured speed value and checks whether this difference falls below a certain, predeterminable value.
  • block 26 If this is the case, the method is continued with block 26, it is not the case with block 27.
  • block 26 that is, if the difference between the current and the last measured speed value is smaller than the predetermined value, in A digital zero is written into a shift register specially reserved for this purpose, while in the case of block 27 a 1 is written into the same position of the shift register.
  • the flow chart after blocks 26 or 27 is continued in any case with block 28, with the aid of which the digital values written into the shift register are shifted by one position.
  • decision block 29 by checking whether there are exclusively digital zero values in the shift register, that is to say no ones are written.
  • decision block 30 it is next checked in decision block 30 whether the difference between the current filtered speed value (short-term mean value) and a predefinable target idling speed is not equal to zero. If the two speed values mentioned are the same, the method according to the invention is ended, as is the case if a 1 is contained in the shift register. If, however, there is a difference between the current speed value and the predefined idling target speed, it is checked in the following decision block 31 whether this difference is less than zero. If it is less than zero, the throttle valve in the intake pipe of the internal combustion engine is influenced in block 32 so that the speed of the internal combustion engine increases. If, on the other hand, the difference is greater than zero, i.e.
  • the position of the throttle valve is influenced in such a way that the speed of the internal combustion engine is reduced, i.e. the adjustable throttle valve stop 13 is influenced in such a way that the throttle valve 12 continues to move closes.
  • the signal generated by the throttle valve potentiometer 14 serves as feedback for the position or adjustment of the throttle valve 12.
  • All checks carried out when the method according to the invention is carried out are dependent on any input signals which are available to the electronic control unit which carries out the method.
  • Such input signals are e.g. a signal relating to the operation of the overrun fuel cut-off, a motor temperature signal, an intake air temperature signal, a signal relating to the current speed of the internal combustion engine, etc. , and may in turn depend on any operating parameters of the internal combustion engine.
  • the control unit generates an output signal that influences the throttle valve, e.g. in such a way that the throttle valve can be adjusted by a predefinable change unit at most each time the method according to the invention is run through.
  • the operating state of the idle is sure he knows. For this purpose, it is checked whether the throttle valve is closed (21) and whether the fuel cut-off is switched off at the same time (22).
  • the internal combustion engine is idle only under these conditions. So that special operating conditions of the internal combustion engine can also be taken into account, it is also checked whether the warm-up phase of the internal combustion engine has ended (23) and whether there are no hot start conditions at the same time (24).
  • the block 20 has the task of specifically influencing the frequency of the execution of the method according to the invention, whereby the method according to the invention can be adapted to the respective tasks and conditions of use.
  • the method according to the invention does not continuously influence the throttle valve, but only if the speed of the internal combustion engine has remained almost constant over a predefinable period of time.
  • the difference between two successive speed values is measured in block 25 and compared with a predetermined value, so that it can then be determined in block 29 whether the. Engine speed remained constant or not. If the difference between two successive speed values exceeds a certain predetermined value, a 1 is written into the shift register, which means that this 1 is retained in the shift register at least for a certain time. However, as long as there is a 1 in the shift register, the throttle valve is not changed. Overall, therefore, a change only takes place if a 1, once written into the shift register, is moved out of the shift register again by shifting in block 28, and thus the entire shift register is filled with zeros.

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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)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

Un procédé pour régler la vitesse à vide d'un moteur à combustion interne, dans lequel la position du papillon dans la canalisation d'admission du moteur est modifiée selon la vitesse du moteur et un signal de positionnement caractéristique du papillon. Le changement de position du papillon ne peut s'effectuer que s'il a pris une position déterminée, présélectionnable et si la vitesse du moteur est restée virtuellement constante sur une période qui peut également être présélectionnée. Un exemple de construction est décrit sous la forme d'un schéma de fonctionnement, qui peut servir à réaliser le procédé de l'invention.

Claims (10)

1. Procédé pour la régulation de la vitesse de rotation à vide d'un moteur à combustion interne, avec un clapet d'étranglement (12) dans le tube d'aspiration (11 ) du moteur à combustion interne, avec un équipement pour le déplacement du clapet d'étranglement (12) en fonction d'un signal électrique de commande, avec un équipement pour l'enregistrement d'au moins une position déterminée du clapet d'étranglement (12) et la production d'un signal électrique correspondant de position, avec un équipement pour l'enregistrement de la vitesse de rotation du moteur à combustion interne et la production d'un signal correspondant de la vitesse de rotation, ainsi qu'avec un appareil électrique de commande (10) pour la production du signal de commande, au moins en fonction du signal de position et du signal de la vitesse de rotation; caractérisé en ce que la position du clapet d'étranglement (12) est modifiable de façon automatique, dans le sens d'une diminution de la différence entre la vitesse de rotation nominale et la vitesse de rotation réelle, si:
a) le clapet d'étranglement (12) a occupé la position déterminée, et
b) si la vitesse de rotation du moteur à combustion interne est restée à peu près constante au-delà d'un laps de temps choisi à priori, et
c) s'il se produit une divergence entre la valeur réelle de la vitesse de rotation et la valeur nominale de la vitesse de rotation.
2. Procédé selon la revendication 1, caractérisé en ce que, pour la position déterminée du clapet d'étranglement (12), il s'agit de la butée (13) du clapet d'étranglement (12) dans sa position à vide.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le déplacement du clapet d'étranglement (12) est effectué au moyen d'un déplacement de la butée (13) du clapet d'étranglement (12).
4. Procédé selon au moins une des revendications 1 à 3, caractérisé en ce que la vitesse de rotation du moteur à combustion interne est considérée par la suite comme à peu près constante si la différence entre deux valeurs consécutives de la vitesse de rotation ne dépasse pas une valeur déterminée, choisie à priori.
5. Procédé selon au moins une des revendications 1 à 4, caractérisé en ce que la position du clapet d'étranglement (12) peut être modifiée si l'embrayage n'est pas enclenché.
6. Procédé selon au moins une des revendications 1 à 5, caractérisé en ce que la position du clapet d'étranglement (12) peut être modifiée si le moteur n'est plus froid.
7. Procédé selon au moins une des revendications 1 à 6, caractérisé en ce que la position du clapet d'étranglement (12) peut être modifiée si le moteur n'est pas trop chaud.
8. Procédé selon au moins une des revendications 1 à 7, caractérisé en ce que la position du clapet d'étranglement (12) peut être modifié si la vitesse de rotation du moteur à combustion interne s'écarte d'une valeur nominale de la vitesse de rotation à vide, choisie à priori.
9. Procédé selon au moins une des revendications 1 à 8, caractérisé en ce que la position du clapet d'étranglement (12) peut être modifiée si, depuis la dernière modification de la position du clapet d'étranglement (12), il s'est écoulé un laps de temps déterminé, choisi à priori.
10. Procédé selon au moins une des revendications 1 à 9, caractérisé en ce que le clapet d'étranglement (12) peut être ouvert davantage si la vitesse de rotation du moteur à combustion interne est plus petite que la valeur nominale prédéterminée de la vitesse de rotation, et en ce que le clapet d'étranglement (12) peut être fermé si la vitesse de rotation du moteur à combustion interne est plus grande que la valeur nominale prédéterminée de la vitesse de rotation.
EP86900735A 1985-05-18 1986-01-15 Procede pour regler la vitesse a vide d'un moteur a combustion interne Expired EP0222775B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3518014 1985-05-18
DE3518014A DE3518014C2 (de) 1985-05-18 1985-05-18 Verfahren zur Einstellung einer Drosselklappe einer Brennkraftmaschine im Leerlauf

Publications (2)

Publication Number Publication Date
EP0222775A1 EP0222775A1 (fr) 1987-05-27
EP0222775B1 true EP0222775B1 (fr) 1988-09-14

Family

ID=6271124

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86900735A Expired EP0222775B1 (fr) 1985-05-18 1986-01-15 Procede pour regler la vitesse a vide d'un moteur a combustion interne

Country Status (6)

Country Link
US (1) US5002027A (fr)
EP (1) EP0222775B1 (fr)
JP (1) JPS62502904A (fr)
BR (1) BR8606683A (fr)
DE (2) DE3518014C2 (fr)
WO (1) WO1986007116A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3720255A1 (de) * 1987-06-19 1988-12-29 Bosch Gmbh Robert System zur einstellung des drosselklappenwinkels
SE534110C2 (sv) * 2009-09-14 2011-05-03 Scania Cv Ab Metod för bestämning av växlingspunkter

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964457A (en) * 1974-06-14 1976-06-22 The Bendix Corporation Closed loop fast idle control system
JPS5596330A (en) * 1979-01-18 1980-07-22 Nissan Motor Co Ltd Engine revolution regulator of diesel engine
US4365599A (en) * 1979-05-09 1982-12-28 Nissan Motor Company, Limited Open and closed loop engine idling speed control method and system for an automotive internal combustion engine
JPS5644431A (en) * 1979-09-14 1981-04-23 Nippon Denso Co Ltd Method of controlling revolution speed of engine
JPS57108435A (en) * 1980-12-24 1982-07-06 Fuji Heavy Ind Ltd Speed controller of engine
US4359983A (en) * 1981-04-02 1982-11-23 General Motors Corporation Engine idle air control valve with position counter reset apparatus
JPS57188746A (en) * 1981-05-15 1982-11-19 Nippon Denso Co Ltd Idling rotation control method for internal combustion engine
DE3238753A1 (de) * 1982-10-20 1984-04-26 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur regelung des einer brennkraftmaschine zuzufuehrenden kraftstoffluftgemischs
JPS59160057A (ja) * 1983-03-02 1984-09-10 Mazda Motor Corp エンジンのアイドル回転数制御装置
JPS6017249A (ja) * 1983-07-11 1985-01-29 Toyota Motor Corp 内燃機関のアイドリング運転制御方法
JPS6040752A (ja) * 1983-08-17 1985-03-04 Nissan Motor Co Ltd 内燃機関のアイドル回転速度制御方法

Also Published As

Publication number Publication date
EP0222775A1 (fr) 1987-05-27
DE3660730D1 (en) 1988-10-20
BR8606683A (pt) 1987-08-11
US5002027A (en) 1991-03-26
DE3518014A1 (de) 1986-11-20
DE3518014C2 (de) 1995-07-06
JPS62502904A (ja) 1987-11-19
WO1986007116A1 (fr) 1986-12-04

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