EP0858554B1 - Procede de reglage de la charge d'un moteur a combustion interne, notamment pour un vehicule automobile - Google Patents

Procede de reglage de la charge d'un moteur a combustion interne, notamment pour un vehicule automobile Download PDF

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Publication number
EP0858554B1
EP0858554B1 EP96943864A EP96943864A EP0858554B1 EP 0858554 B1 EP0858554 B1 EP 0858554B1 EP 96943864 A EP96943864 A EP 96943864A EP 96943864 A EP96943864 A EP 96943864A EP 0858554 B1 EP0858554 B1 EP 0858554B1
Authority
EP
European Patent Office
Prior art keywords
value
opening
throttle valve
accordance
combustion engine
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
EP96943864A
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German (de)
English (en)
Other versions
EP0858554A2 (fr
Inventor
Bernhard Bauer
Michael SÜDHOLT
Manfred Wier
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0858554A2 publication Critical patent/EP0858554A2/fr
Application granted granted Critical
Publication of EP0858554B1 publication Critical patent/EP0858554B1/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
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/105—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
    • 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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor

Definitions

  • the invention relates to a method for load adjustment Internal combustion engine, in particular for a motor vehicle, according to the preamble of claim 1.
  • the invention is based on a throttle valve control according to DE 42 23 253.
  • a control unit electronic engine power control
  • This serves as Reference variable for a position controller that is an electromotive Actuator for setting the opening angle controls the throttle valve.
  • Fuel metering systems are required for correct mixture preparation accurate information about that from the internal combustion engine Air mass sucked in per stroke. Receive this information them via a quickly responding air mass sensor, who works for example on the hot film principle. The output signal from the air mass sensor follows its high response speed every pulsation in the Airflow. Back-flowing air masses are also - however with wrong sign - recorded.
  • the air mass sensor delivers no more correct measured values for mixture preparation would be usable.
  • an internal combustion engine has a maximum opening angle determined depending on the speed.
  • the opening angle of the Throttle valve is in the sense of minimal fuel consumption regulated with the proviso that the maximum opening angle is not exceeded. Abrupt changes in power delivery the internal combustion engine are thus prevented.
  • the object of the invention is to provide a simple method by avoiding pulsations upstream a throttle valve in an intake duct of an internal combustion engine occur.
  • An engine control system (FIG. 1) has an accelerator pedal 1 an encoder 2, which detects the position of the accelerator pedal 3.
  • the transmitter 2 is electrically conductive with a control unit 3 connected.
  • the control unit 3 detects the ambient pressure a pressure sensor 4 or derives it from auxiliary variables.
  • a temperature sensor 5 and an air mass sensor 6 are in one Suction channel 7 arranged and electrically conductive with the Control unit 3 connected.
  • the temperature sensor 5 detects the Air temperature in the intake duct 7.
  • the air mass sensor 6 detects the intake air mass.
  • a throttle valve 8 is downstream in the intake duct 7 arranged by the air mass sensor 6.
  • the throttle valve 8 is adjustable by an electric motor drive 9.
  • Of the Intake duct 7 is connected to an internal combustion engine 10.
  • FIG. 2 shows a full load line VL with full load values of the opening angle the throttle valve 8 depending on the Speed n. At each full load value is a maximum filling (hereinafter referred to as motor full load) the cylinder the engine 10 reached. With the same Speed n, therefore increases by increasing the opening angle the throttle valve 8, the filling of the cylinders no more.
  • motor full load a maximum filling
  • Pulsations occur at low to medium speeds n on. They are particularly pronounced in internal combustion engines 10 with up to four cylinders. From Figure 2 it can be seen that the pulsation value is greater at each speed n than the full load value or equal to the full load value if the Full load value the value of the maximum opening angle of the throttle valve having.
  • the method according to the invention is based on an opening characteristic OK, that between the full load line VL and the pulsation line PL is placed and from which for each speed n Opening base value OBW can be determined, which is between the associated full load value on the full load line VL and the this speed associated pulsation value on the pulsation line PL lies.
  • the full load line, the pulsation line and Opening characteristic curve OK apply to a tuning temperature of Air in the intake duct 7 (e.g. 20 ° C) and for a tuning pressure the ambient pressure (e.g. 1000 mbar). Soak the temperature and / or the ambient pressure from these tuning values a corresponding correction is necessary.
  • the opening angle of the throttle valve 8 operated by an electric motor is limited to a speed-dependent opening value OW, which corresponds to the opening base value OBW for these tuning values.
  • a first correction value KW1 is determined from a map KF (FIG. 3) as a function of the temperature and the ambient pressure. With the first correction value KW1, the opening value OW is adapted to the ambient pressure and the temperature in the respective operating state of the internal combustion engine 10. The first correction value KW1 has the value zero for the tuning temperature and the tuning pressure. A higher ambient pressure than the tuning pressure causes a reduction in the first correction value KW1, an increase in the temperature in comparison to the tuning temperature causes an increase in the first correction value KW1.
  • step S1 The method according to the invention (FIG. 4) is carried out in step S1 started.
  • the opening characteristic curve OK is selected in step S2. If the engine control system has an intake duct 7 with variable effective length or inlet valves with variable Valve timing is effective for any length of the intake duct 9 or an opening characteristic for each valve timing ⁇ K permanently saved.
  • a variable valve timing is a change in the time of opening or the closing time of the intake valves relative to the associated ones Denoted crankshaft angles.
  • the variable valve timing can, for example, with a camshaft has differently formed cams, or with electronic controlled intake valves can be obtained.
  • step S3 the opening base value OBW is determined.
  • the Speed n is determined, for example, by a speed sensor the crankshaft detected. Depending on the speed n then the associated opening base value OBW on the opening characteristic OK determined.
  • step S4 the first correction value KW1 becomes dependent of the temperature in the intake duct 7 and the ambient pressure determined from the map KF.
  • the opening value OW becomes the sum in step S5 from the opening base value OBW and the first correction value KW1 assigned ..
  • step S6 it is checked whether a target value SW which is dependent is formed by the position of the accelerator pedal 1, is greater than the opening value OW. If so, so it branches to step S7. Otherwise, the Step S8 refused. There the opening value OW becomes the setpoint SW assigned and thus the setpoint SW to the opening value OW limited.
  • step S8 the throttle valve 8 is set to the opening angle, which corresponds to the setpoint SW.
  • the Setpoint SW is used as a reference variable for a position controller which controls the opening angle of the throttle valve 8. in the Step S9 ends the process.
  • the opening characteristic is OK in this embodiment of the Procedure so that the opening base values OBW amount are only slightly below the associated pulsation values.
  • step S4a There the second correction value KW2 from an adaptation table determined depending on the speed.
  • the adaptation table is for each effective length of the intake duct 7 and for each Valve control time stored in a memory and can be changed become.
  • the second correction value KW2 makes manufacturing tolerances and age-related changes in Internal combustion engine 10 and the intake duct 7 are taken into account, which result in a shift in the pulsation line can.
  • step S5a the opening value OW becomes the sum of the Opening base value OBW, the first correction value KW1 and the second correction value KW2 assigned.
  • Step S8 in which the throttle valve 8 is set, method step S12 follows. There will checks for a pulsation in the intake duct 7 upstream the throttle valve 8 is present. This will be a familiar one Processes such as disclosed in EP 0575635. Since this method is not essential to the invention is not described further below.
  • step S12 If a pulsation is recognized in step S12, then in the Step S10 branches. There the setpoint SW becomes the old one Setpoint value SW reduced by a delta value DW. Of the Delta value DW is a fixed, predetermined positive value. in the Step S11 becomes the second correction value KW2 around the delta value DW decreased. After step S11, the process continued again in step S8.
  • Step S12 If no pulsation is detected in step S12, then in the Step S13 branches and there the second control value KW2 saved. The adaptation table is thus adapted. in the Step S9 ends the process.
  • This procedure ensures that the second correction value KW2 is adjusted so that the opening angle of the the opening value OW does not correspond to the pulsation.
  • step S14 is followed by step S14, in which the throttle valve is set analogously to step S8 becomes.
  • step S15 it is checked whether the target value SW is larger or is equal to a maximum opening value OWmax, which is the maximum The opening angle of the throttle valve corresponds. Is this if this is the case, the process branches to step S12. Otherwise it branches to step S16.
  • step S17 branches, in which the setpoint SW increases by the delta value DW becomes. Otherwise the program branches to step S10.
  • step S18 the second correction value KW2 is increased by the delta value DW increased. After that, the process in the step S14 continued.
  • the second correction value is in this embodiment of the method according to the invention adapted so that the opening angle, which corresponds to the opening value OW, just below of the opening angle of the throttle valve is at the pulsations occur or at which the maximum opening angle is reached is. Manufacturing tolerances and age-related changes can thus be taken into account.

Landscapes

  • 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)

Claims (7)

  1. Procédé de réglage de la charge d'un moteur à combustion interne, en particulier pour un véhicule automobile, par lequel l'angle d'ouverture d'un papillon des gaz (8), réglable électroniquement en position, est commandé, dans un canal d'admission (7), par la position d'une pédale d'accélérateur (1), l'angle d'ouverture étant limité à une valeur d'ouverture (OW) dépendant de la vitesse de rotation,
       caractérisé en ce que la valeur d'ouverture (OW) contient une valeur de base d'ouverture (OBW) comprise entre une valeur limite inférieure (valeur à pleine charge), pour laquelle la pleine charge du moteur est atteinte, et une valeur limite supérieure (valeur de pulsation) pour laquelle aucune pulsation de l'air ne se produit encore dans un canal d'admission (7) en amont du papillon des gaz (8).
  2. Procédé suivant la revendication 1, caractérisé en ce que la valeur d'ouverture (OW) est obtenue en corrigeant la valeur de base d'ouverture (OBW) par addition d'une première valeur de correction (KW1) qui dépend de la température dans le canal d'admission (7) du moteur à combustion interne et de la pression ambiante.
  3. Procédé suivant la revendication 1 ou la revendication 2, caractérisé en ce que la valeur d'ouverture (OW) est obtenue en corrigeant la valeur de base d'ouverture (OBW) par addition d'une deuxième valeur de correction (KW2) qui dépend de la vitesse de rotation (n) et est ajustée de telle façon que, pour l'angle d'ouverture du papillon des gaz (8) correspondant à la valeur d'ouverture (OW), aucune pulsation de l'air ne se produit encore dans le canal d'admission (7).
  4. Procédé suivant la revendication 1, caractérisé en ce que la valeur de base d'ouverture (OBW) dépend, en plus, de la longueur efficace du canal d'admission (7).
  5. Procédé suivant la revendication 1, caractérisé en ce que la valeur de base d'ouverture (OBW) dépend, en plus, de la durée de commande des soupapes d'admission.
  6. Procédé suivant la revendication 3, caractérisé en ce que la deuxième valeur de correction (KW2) dépend, en plus, de la longueur efficace du canal d'admission.
  7. Procédé suivant la revendication 3, caractérisé en ce que la deuxième valeur de correction (KW2) dépend, en plus, de la durée de commande des soupapes d'admission.
EP96943864A 1995-10-30 1996-10-04 Procede de reglage de la charge d'un moteur a combustion interne, notamment pour un vehicule automobile Expired - Lifetime EP0858554B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19540832A DE19540832C1 (de) 1995-10-30 1995-10-30 Verfahren zur Lasteinstellung einer Brennkraftmaschine, insbesondere für ein Kraftfahrzeug
DE19540832 1995-10-30
PCT/DE1996/001913 WO1997016637A2 (fr) 1995-10-30 1996-10-04 Procede de reglage de la charge d'un moteur a combustion interne, notamment pour un vehicule automobile

Publications (2)

Publication Number Publication Date
EP0858554A2 EP0858554A2 (fr) 1998-08-19
EP0858554B1 true EP0858554B1 (fr) 1999-08-04

Family

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Application Number Title Priority Date Filing Date
EP96943864A Expired - Lifetime EP0858554B1 (fr) 1995-10-30 1996-10-04 Procede de reglage de la charge d'un moteur a combustion interne, notamment pour un vehicule automobile

Country Status (4)

Country Link
US (1) US5992384A (fr)
EP (1) EP0858554B1 (fr)
DE (2) DE19540832C1 (fr)
WO (1) WO1997016637A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3837819B2 (ja) * 1997-03-19 2006-10-25 株式会社デンソー 内燃機関用バルブタイミング制御装置
JPH1113518A (ja) * 1997-06-27 1999-01-19 Aisin Seiki Co Ltd スロットルバルブ制御装置
FR2766872B1 (fr) * 1997-08-01 1999-10-15 Renault Procede de correction des a-coups de couple d'un moteur a combustion interne
JP3593896B2 (ja) * 1998-09-17 2004-11-24 日産自動車株式会社 エンジンの制御装置
US6112724A (en) * 1998-12-08 2000-09-05 Ford Global Technologies, Inc. Throttle position filtering method
US6526941B1 (en) * 2001-08-14 2003-03-04 Visteon Global Technologies, Inc. Dynamic electronic throttle position feedforward system
DE10308497A1 (de) * 2003-02-26 2004-09-09 Robert Bosch Gmbh Verfahren und Vorrichtung zur Detektion der Betätigung eines Bedienelementes

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2926106A1 (de) * 1979-06-28 1981-01-08 Volkswagenwerk Ag Verfahren und anordnung zum betrieb einer fahrzeug-brennkraftmaschine
JPS5696132A (en) * 1979-12-28 1981-08-04 Honda Motor Co Ltd Engine controller
US4781162A (en) * 1986-08-04 1988-11-01 Honda Giken Kogyo Kabushiki Kaisha Throttle valve control system for an internal combustion engine
JP2506150B2 (ja) * 1988-06-03 1996-06-12 株式会社日立製作所 内燃機関のスロットル制御装置
EP0575635B1 (fr) * 1992-05-27 1998-01-07 Siemens Aktiengesellschaft Mesure du débit massique d'air pulsatoire dans la tubulure d'aspiration d'un moteur à combustion interne
DE4223253C2 (de) * 1992-07-15 1996-04-11 Bosch Gmbh Robert Steuereinrichtung für ein Fahrzeug
DE4239842A1 (de) * 1992-11-27 1994-06-01 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
US5517410A (en) * 1993-07-08 1996-05-14 Toyota Jidosha Kabushiki Kaisha Apparatus for controlling vehicle drive force depending upon vehicle load determined by engine load and vehicle speed
US5521825A (en) * 1993-10-06 1996-05-28 General Motors Corporation Engine inlet air valve positioning
DE4434022C2 (de) * 1994-09-23 1999-11-11 Daimler Chrysler Ag Verfahren und Vorrichtung zur Geschwindigkeitsbegrenzung eines Kraftfahrzeuges

Also Published As

Publication number Publication date
EP0858554A2 (fr) 1998-08-19
WO1997016637A3 (fr) 1997-07-10
DE59602657D1 (de) 1999-09-09
WO1997016637A2 (fr) 1997-05-09
US5992384A (en) 1999-11-30
DE19540832C1 (de) 1997-07-03

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