EP0185945B1 - Dispositif de détection d'une position de calage d'un organe mobile - Google Patents

Dispositif de détection d'une position de calage d'un organe mobile Download PDF

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Publication number
EP0185945B1
EP0185945B1 EP85114945A EP85114945A EP0185945B1 EP 0185945 B1 EP0185945 B1 EP 0185945B1 EP 85114945 A EP85114945 A EP 85114945A EP 85114945 A EP85114945 A EP 85114945A EP 0185945 B1 EP0185945 B1 EP 0185945B1
Authority
EP
European Patent Office
Prior art keywords
value
stored
extreme value
idle
sensing
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
EP85114945A
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German (de)
English (en)
Other versions
EP0185945A2 (fr
EP0185945A3 (en
Inventor
Rolf Dipl.-Ing. Kohler
Günther Dipl.-Ing. Plapp
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 EP0185945A2 publication Critical patent/EP0185945A2/fr
Publication of EP0185945A3 publication Critical patent/EP0185945A3/de
Application granted granted Critical
Publication of EP0185945B1 publication Critical patent/EP0185945B1/fr
Expired 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/28—Interface circuits
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/16—End position calibration, i.e. calculation or measurement of actuator end positions, e.g. for throttle or its driving actuator

Definitions

  • the invention is based on a method according to the type of the main claim, in particular for detecting the idle position of the throttle valve of an internal combustion engine.
  • an electrically controlled, intermittently operating fuel injection system with an injection signal generation is known, which is based on the speed and the throttle valve position.
  • the throttle valve position is detected there using a potentiometer.
  • an optimal fuel metering it is necessary that the throttle valve position is detected very precisely, particularly in the area of relatively small throttle valve opening angles. e.g. B. to set the idle, an idle position of the throttle valve must be detected, for which purpose an idle switch is usually used.
  • the idle stop is subject to changes both through setting the idle speed and through mechanical wear of the stop.
  • the idle position of the throttle valve must be recognized within a very small angular range of approx. 0.3 °, since only there are the air flows small enough to keep the change in torque when switching on and off the fuel within tolerable limits thanks to the overrun fuel cutoff function.
  • US-A-4 336 593 describes a data processing system with a microcomputer for an automobile for controlling various vehicle devices.
  • An input unit checks whether the input signals are within a specified range. If the respective input signal is within the range, the signal is processed further as the current actual value. However, if the signal is outside the range, the previous value is used for data processing (see end of the abstract).
  • signal classifications are also known in the technical field as so-called signal range checks. They are sometimes referred to as plausibility checks for the respective signals.
  • this US-A-4,336,593 speaks of the fact that data which has been stored can be replaced by newer data.
  • GB-A-2 113 426 describes a method for obtaining an electrical measured value with respect to a completely closed throttle valve. The value last saved for the fully closed throttle valve is corrected whenever a new value is measured over a fixed period of time with the throttle valve fully closed.
  • the invention has for its object to improve the known in the prior art method so that with high accuracy and rapid adaptation, even with irregular operating conditions and large angle differences, an extreme value can be adapted isolated, without the opposite extreme value one could exert influence.
  • the inventive method with the characterizing features of the main claim solves this problem and has the advantage that an exact setting and detection of this position is ensured by a very low hysteresis and reliable detection of the idle position.
  • FIG. 1 shows an overview of an electronically controlled injection system, in which the throttle valve position and the speed are processed as the most important operating parameters
  • FIG. 2 shows a flow diagram as an exemplary embodiment of the invention
  • FIG. 3 shows various examples of an irregular displacement of the idling position and its correction
  • FIG. 4 shows a flow diagram to explain the operation of the idle detection.
  • Figure 1 discloses the basic structure of an electrically controlled and preferably intermittent fuel injection system, based on signals of the speed and the throttle valve position angle. Such an arrangement is e.g. B. from the aforementioned DE-OS 24 42 373 known.
  • An internal combustion engine 10 receives intake air via an intake pipe 11 with a throttle valve 12 and has an exhaust pipe 13.
  • a speed sensor 14 detects the instantaneous speed of the crankshaft and, together with the position ⁇ of the throttle valve 12, determines an injection signal tp for an injection valve 15 assigned to the intake manifold 11.
  • the speed and the throttle valve position still other operating parameters, such as. B. the temperature and the lambda value. This is indicated by further inputs of the control unit 16.
  • the position a of the throttle valve 12 is detected by a potentiometer 17 and supplied to the control unit 16 as a measured value M. Over the entire slider path of the potentiometer 17, the operating voltage of the potentiometer falls from z. B. from 5 volts. If you divide the slider track into increments, then there are 256 increments in the case of 8 bits over the entire slider track. Since the mechanical adjustment range of the throttle valve 12 must lie within the adjustment range of the potentiometer, a specific data word results for the mechanical throttle valve stop A (idle position), which corresponds to a very low voltage or a small number of increments. In Figure 3, the mechanical stop A corresponds to nine increments.
  • the idle position of the throttle valve can shift due to mechanical displacement of the potentiometer relative to the throttle valve, aging, wear of the stops and other error influencing variables. Through constant adaptation, the exact idle position should always be recognizable in a purely electronic manner.
  • the mode of operation of the adaptation will be explained below with reference to FIGS. 2 and 3.
  • the adaptation process is started 20 after the supply voltage has been switched on (e.g. ignition lock), after the internal combustion engine has started and after the engine temperature has exceeded a certain threshold. This represents the beginning of an operating cycle, which is ended by switching off the internal combustion engine or the supply voltage.
  • This is followed by an initialization 21 in which four memory cells or registers F, H, G and I are set to the value 0.
  • method step 22 the stored value of the idle position S LL is increased by one increment.
  • the query step 23 now takes place, with which it is determined whether the measured value M present at the moment is greater than the stored idle value S LL .
  • this condition applies, it is checked in query step 24 whether this measured value M lies outside a partial correction range which is limited by the value S LL on the one hand and S LL + 2 on the other. If this is the case, the condition M> S LL , 2 is fulfilled, the register F is set to the value 1 in step 25 and, after a delay time of 10 ms, a return to the query step 23 in a program loop. The cycle for querying the measured value M is specified in method step 26. The loop 23 to 26 is now run through until the measured value falls within the correction range.
  • steps 24, 27, 28 are carried out, it being determined in query step 28 that register F no longer has the value 1, so that method steps 32 and 36 lead to query step 23 is returned.
  • the described loop is run through without changes until the measured value M rises above the value S LL + 2 (query step 24), whereby in step 25 the register F is reset to the value 1.
  • This loop 23, 24, 25, 26 is now run through until the measured value M no longer fulfills the condition of the query step 24.
  • the measured value M is smaller than the stored idle value S LL , it can be concluded immediately that this measured value M is at least closer to the actual idle value than the stored idle value does. The question of whether this measured value is close to the stored idle value is therefore superfluous.
  • query step 34 it is therefore immediately checked whether the memory content of the register G> 2, which is not the case at this time.
  • query step 35 it is then determined that the measured value M has not yet occurred, so that the registers G and I are set to the value 0 and the value 1 via method steps 36, 37 and via method step 26 to the query step again 23 is returned.
  • the measured value should correspond to the idling stop value A.
  • the stored idle value is shown with double hatching in each case, while the two increments adjoining it on the right, which are simply hatched, represent the part of the correction range located to the right of the idle value.
  • the stored idle value corresponds to the value 5. In this operating cycle, only the loop 23, 24, 25, 26 can be run through. In the subsequent operating cycle, the stored idle value increases in method step 22 by one increment (line b), but the loop 23, 24, 25, 26 is also run through again.
  • condition 24 is no longer fulfilled, i.e. the measured value is now in the correction range. Now occurs - as described
  • this measured value is stored as a new idling vest S LL in the same operating cycle as is shown in column d.
  • the new idle value is first incremented again in method step 22, as shown in column e.
  • query step 23 it is now determined that the measured value is smaller than the stored idle value, so that according to the above statements, after four identical occurrences, this measured value is stored as a new idle value, as shown in column f.
  • the stored idle value can be increased by a number of increments instead of by one increment, which correspond to the maximum possible idle position of the throttle valve during warming up of the internal combustion engine.
  • This number of increments corresponds, for example, to an angular position of 20 °.
  • the engine temperature does not apply as a starting condition in process step 20.
  • the throttle valve angle is set to a high idling value, which is then recorded and stored using process steps 34 to 39. If the idle angle slowly decreases as far as it will go with increasing engine temperature, the stored idle value follows this changing value by constant adaptation. At least one successfully completed adaptation process should be awaited for idle detection.
  • FIG. 4 explains the logical decision in control unit 16 whether the idle position is present or not.
  • query step 40 queries whether the current measured value M is smaller than the stored idle value S LL increased by three increments, that is to say whether the measured value lies within a hatched area according to FIG. 3. If this is not the case, no idle position is recognized in method step 41. If, on the other hand, the conditions apply, it is checked in query step 42 whether register I contains the value 1. This is only the case if at least one measured value that is below the idle value S LL was previously detected (see method steps 35 and 37).
  • This query step 42 is necessary for the reliable identification of the idle operation if, in method step 22, the stored idle value S LL has been increased by a large amount at the beginning of an operating cycle , which is above the idle position during warm-up. On the other hand, if, according to FIG. 2, the stored idle speed S LL was increased by only one increment, the query step 42 can be omitted. In method step 43, the idle position is then identified when the condition of query step 40 and, if applicable, query step 42 is present.
  • the values of a characteristic curve or a characteristic diagram are selected by the measured values of the throttle valve position in the control device 16, for example to determine the injection time, then after an adaptation, that is to say after a Shifting the idle position compared to the originally entered value naturally also results in a corresponding shift in the characteristic curve or the characteristic diagram.
  • the newly determined and stored idle value is stored in a non-volatile or buffered memory and is available again when the internal combustion engine is started again.
  • the described method is not limited to the detection of the idle position of a throttle valve, but is in principle suitable for the detection of a minimum value of any movable part that can perform both linear and non-linear movements.
  • position detection devices such as, for. B. optical, inductive and capacitive systems can be used.
  • an initialization adaptation can preferably be provided, which is initiated, for example, by connecting a specific control unit pin to ground. This enables the control unit to recognize that an initialization adaptation is to be carried out. During this operating mode, the smallest measured value that occurs is interpreted as an idle value.
  • the adaptation is not subject to any stationary or dynamic restrictions.
  • the plausibility check can consist, for example, of whether the measured values recorded lie within a range that is at all possible as an extreme value position.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Claims (6)

1. Procédé pour détecter une position de valeur extrême (position de calage) d'une pièce mobile par un organe de détection de position notamment pour détecter la position de ralenti du papillon d'un moteur à combustion interne, une valeur inscrite en mémoire (valeur extrême) correspondant à la position de valeur extrême étant corrigée par la détection de valeurs mesurées, différentes, et la plage de déplacement de la pièce mobile se situe dans la plage qui peut être détectée par l'organe de détection de position et la position de la partie mobile est fixée par une seule coordonnée, procédé caractérisé en ce que la valeur extrême est une valeur minimale et une plage de correction est définie autour de la valeur extrême, plage qui englobe toutes les valeurs inférieures à la valeur extrême inscrite en mémoire et une plage finie, supérieure à celle-ci, et en ce qu'après avoir détecté un nombre déterminé de valeurs de mesure identiques dans cette plage de correction au cours d'un cycle de fonctionnement, on inscrit comme nouvelle valeur extrême cette valeur de mesure et en ce que la valeur inscrite en mémoire est augmentée d'une valeur prédéterminée en fonction de la valeur des paramètres.
2. Procédé selon la revendication 1, caractérisé en ce que dans la plage finie de la plage de correction, on détecte des valeurs de mesure supérieures à la valeur extrême inscrite en mémoire (hachure simple à la figure 3), on ne détecte des valeurs de mesure identiques et on les utilise pour déterminer une nouvelle valeur extrême que si l'on détecte dans l'intervalle, des valeurs de mesure situées à l'extrérieur de la plage de correction.
3. Procédé selon la revendication 1, caractérisé en ce que le changement de la valeur extrême inscrite en mémoire se fait avant chaque cycle de fonctionnement.
4. Procédé selon la revendication 3, caractérisé en ce que le changement correspond chaque fois à un incrément.
5. Procédé selon la revendication 3 pour détecter la position du papillon d'un moteur à combustion interne, procédé caractérisé en ce que le changement correspond chaque fois à un certain nombre d'incréments associés à un angle et qui correspond au moins à l'angle de ralenti du papillon nécessaire pour la phase de réchauffage du moteur à combustion interne.
6. Procédé selon l'une des revendications précédentes, caractérisé en ce que par un signal de commutation, on peut mettre en oeuvre une adaptation d'initialisation au cours de laquelle la plus petite valeur de mesure qui se présente est interprétée comme valeur extrême et est inscrite en mémoire.
EP85114945A 1984-12-17 1985-11-26 Dispositif de détection d'une position de calage d'un organe mobile Expired EP0185945B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3445983 1984-12-17
DE19843445983 DE3445983A1 (de) 1984-12-17 1984-12-17 Verfahren zur erfassung einer extremwertposition eines beweglichen teiles

Publications (3)

Publication Number Publication Date
EP0185945A2 EP0185945A2 (fr) 1986-07-02
EP0185945A3 EP0185945A3 (en) 1987-02-04
EP0185945B1 true EP0185945B1 (fr) 1989-03-15

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ID=6252994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114945A Expired EP0185945B1 (fr) 1984-12-17 1985-11-26 Dispositif de détection d'une position de calage d'un organe mobile

Country Status (4)

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US (1) US4722313A (fr)
EP (1) EP0185945B1 (fr)
JP (1) JPS61145406A (fr)
DE (2) DE3445983A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1182508B (it) * 1985-07-12 1987-10-05 Weber Spa Sistema di autodefinizione della posizione di minima apertura di una valvola comandata da un acceleratore per l alimentazione ad un motore endotermico
DE3612904A1 (de) 1986-04-17 1987-10-22 Bosch Gmbh Robert Verfahren zur toleranzkompensation eines positionsgebersignals
FR2616848B1 (fr) * 1987-06-16 1993-02-12 Renault Procede de reconnaissance de la position pied-leve pour un vehicule a injection ou carburation electronique
JPH0689683B2 (ja) * 1987-07-03 1994-11-09 株式会社日立製作所 電子制御燃料噴射装置
JPH081148B2 (ja) * 1988-11-30 1996-01-10 富士重工業株式会社 エンジンのスロットル弁全閉状態検出装置
DE3909905A1 (de) * 1989-03-25 1990-09-27 Bosch Gmbh Robert Verfahren zur bestimmung wenigstens einer endstellung einer verstelleinrichtung in einem kraftfahrzeug
DE3931455A1 (de) * 1989-09-21 1991-04-04 Bosch Gmbh Robert Verfahren zur steuerung der luftzufuhr einer brennkraftmaschine eines kraftfahrzeugs
JP2542709B2 (ja) * 1989-11-09 1996-10-09 三菱電機株式会社 エンジンのスロットル開度検出装置
JP3634872B2 (ja) * 1992-09-30 2005-03-30 株式会社デンソー スロットル全閉検出装置
DE4335239C1 (de) * 1993-10-15 1994-12-01 Vdo Schindling Verfahren zum Positionieren eines Stellglieds
DE4336038A1 (de) * 1993-10-22 1995-04-27 Vdo Schindling Verfahren zum Betreiben einer Drosselklappen-Verstelleinrichtung
DE4339693A1 (de) * 1993-11-22 1995-05-24 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
DE4340372A1 (de) * 1993-11-26 1995-06-01 Vdo Schindling Verfahren zur Leerlauferkennung bei einer Lastverstelleinrichtung einer drosselklappengeregelten Brennkraftmaschine
US5415144A (en) * 1994-01-14 1995-05-16 Robertshaw Controls Company Throttle position validation method and apparatus
JP3769083B2 (ja) * 1996-10-07 2006-04-19 本田技研工業株式会社 アイドル回転数制御装置の故障判定装置
US6751567B2 (en) * 2001-11-26 2004-06-15 Ford Global Technologies, Llc Electronic throttle plate index position determination for improved airflow correlation over various temperature conditions

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55115101A (en) * 1979-02-26 1980-09-04 Nissan Motor Co Ltd Data processor
JPS56107926A (en) * 1980-01-31 1981-08-27 Nissan Motor Co Ltd Device for detecting entire closing of throttle valve of internal conbustion engine
JPS57188753A (en) * 1981-05-08 1982-11-19 Honda Motor Co Ltd Fuel closing reference positional automatic compensator for exhaust gas recirculating valve in exhaust gas recirculating control equipment
JPS58122326A (ja) * 1982-01-14 1983-07-21 Honda Motor Co Ltd 内燃エンジンの絞り弁アイドル開度検出方法
US4586403A (en) * 1984-01-05 1986-05-06 General Motors Corporation Adaptively calibrated sensing mechanism for an engine demand device
DE3568466D1 (en) * 1984-11-19 1989-04-06 Bosch Gmbh Robert Adjustment method for a position detection member, particularly in a motor vehicle

Also Published As

Publication number Publication date
JPS61145406A (ja) 1986-07-03
EP0185945A2 (fr) 1986-07-02
US4722313A (en) 1988-02-02
DE3568827D1 (en) 1989-04-20
DE3445983A1 (de) 1986-06-19
EP0185945A3 (en) 1987-02-04

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