EP0406246A1 - Procede permettant d'eviter un moment d'entrainement trop eleve. - Google Patents

Procede permettant d'eviter un moment d'entrainement trop eleve.

Info

Publication number
EP0406246A1
EP0406246A1 EP89901856A EP89901856A EP0406246A1 EP 0406246 A1 EP0406246 A1 EP 0406246A1 EP 89901856 A EP89901856 A EP 89901856A EP 89901856 A EP89901856 A EP 89901856A EP 0406246 A1 EP0406246 A1 EP 0406246A1
Authority
EP
European Patent Office
Prior art keywords
speed
change
drag torque
fuel
accelerator pedal
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.)
Granted
Application number
EP89901856A
Other languages
German (de)
English (en)
Other versions
EP0406246B1 (fr
Inventor
Ulrich Flaig
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 EP0406246A1 publication Critical patent/EP0406246A1/fr
Application granted granted Critical
Publication of EP0406246B1 publication Critical patent/EP0406246B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • 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
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • F02D41/126—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off transitional corrections at the end of the cut-off period

Definitions

  • the invention relates to a method for avoiding excessive engine drag torque in road vehicles with the features of the preamble of claim 1.
  • DE-OS 21 39 230 a device is known in which the fuel supply to the engine is increased in the event of a speed of the driven wheels which is too low compared to the vehicle speed without brake actuation. This is to prevent the driven vehicle wheels from having too much slip and the vehicle becoming unstable.
  • the invention has for its object to limit the braking torque occurring in overrun to a value that prevents permanent blocking of the driven wheels.
  • the proposed method Compared to the simple setting of a fuel tightness, which corresponds approximately to the zero load quantity, the proposed method has the advantage that the fuel quantity is reduced to zero on roads with a sufficiently high coefficient of adhesion, i.e. the advantages of the overrun fuel cutoff are retained.
  • Fig. 1 shows a block diagram of an embodiment of the invention
  • 1 is a sensor measuring the engine speed
  • 2 is a characteristic curve memory for the initial values, e.g. B. the remaining injection quantity as a function of the speed
  • 3 denotes a multiplier and 4 a adjusting device for setting a link 5 for varying the fuel supply.
  • 4 is, for example, the control rod of an injection pump, 5 the injection pump itself.
  • An accelerator pedal not shown, also acts on these elements.
  • 6 is a signal generator for the state "accelerator pedal in zero load position" or an empty gas switch. The speed signal of the sensor 1 is fed to a differentiator 7.
  • the threshold switch 8 responds when the decrease in engine speed and thus the deceleration is so great that a tendency to lock is detected.
  • the threshold switch 9 responds when a certain acceleration of the driven wheels is exceeded.
  • Mot 10 is an up / down counter, the numerical value of which represents a correction factor which is linked in multiplier 3 to the output of characteristic curve memory 2.
  • the standardization is selected so that the largest counter reading represents a factor of 1.
  • the counter has inputs for "setting to maximum counter reading” and for counting up or down.
  • the counting frequency which is fed to a terminal 13 is e.g. can be selected by a prescaler, specifically for counting up and down. Furthermore, the inputs are edge triggered.
  • 11 is an inventoryer
  • 12 is an OR gate. If it is signaled via the signal transmitter 6 that the accelerator pedal has been released, a signal dependent on the instantaneous speed and representing the remaining injection quantity is sent from the characteristic memory 2 to the multiplier 3. At its second input, the signal transmitter 6 triggers this instant the correction value 1. Immediately after the accelerator pedal of the adjusting device 4 and thereby the control rod 4 of the injection pump 5 is released, a position is set with which the residual injection quantity is set precisely. This speed-dependent residual injection quantity is chosen so that the drag torque does not reach impermissibly high values under practically all operating conditions. If the drag torque is too high, the drive wheels can lock and the driving stability can thereby be lost.
  • the remaining amount was therefore made time-dependent in addition to the speed dependency.
  • the correction factor defined in the up / down counter 10 is used for this purpose.
  • the correction factor begins to decrease in a ramp over time, starting at value 1, as a result of which the drag torque increases.
  • the correction value is reduced until either the value 0 is reached or the braking force assigned to the drag torque leads to a very rapid drop in engine speed due to the static friction of the tire-road system being exceeded. In this latter case, the signal of the differentiator 7 becomes larger than the threshold value of the threshold value switch 8.

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 Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

Procédé permettant d'éviter un moment d'entraînement trop élevé sur les véhicules routiers. Lorsqu'on relâche la pédale de l'accélérateur, le moteur reçoit une quantité de carburant qui est légèrement inférieure à celle correspondant à une charge nulle et qui est réduite linéairement avec le temps. La modification du nombre de tours qui en résulte est contrôlée. Lorsqu'une modification déterminée du nombre de tours par unité de temps est dépassée, la quantité de carburant est augmentée linéairement avec le temps jusqu'à ce qu'on observe une modification positive déterminée du nombre de tours, puis la quantité de carburant est diminuée à nouveau. Le processus se répète jusqu'à ce que le véhicule fonctionne à un régime correspondant à un nombre de tours constant.
EP19890901856 1988-03-16 1989-02-02 Procede permettant d'eviter un moment d'entrainement trop eleve Expired - Lifetime EP0406246B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808692 1988-03-16
DE3808692A DE3808692A1 (de) 1988-03-16 1988-03-16 Verfahren zur vermeidung eines zu grossen motorschleppmoments

Publications (2)

Publication Number Publication Date
EP0406246A1 true EP0406246A1 (fr) 1991-01-09
EP0406246B1 EP0406246B1 (fr) 1992-01-22

Family

ID=6349821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890901856 Expired - Lifetime EP0406246B1 (fr) 1988-03-16 1989-02-02 Procede permettant d'eviter un moment d'entrainement trop eleve

Country Status (5)

Country Link
US (1) US5113820A (fr)
EP (1) EP0406246B1 (fr)
JP (1) JPH03503077A (fr)
DE (2) DE3808692A1 (fr)
WO (1) WO1989008776A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5313922A (en) * 1989-12-23 1994-05-24 Robert Bosch Gmbh Method for controlling a flow of fuel to an engine of a vehicle during overrun operation
DE3942862C2 (de) * 1989-12-23 2001-04-12 Bosch Gmbh Robert Verfahren zur Motorschleppmomentbegrenzung
DE4226940A1 (de) * 1992-08-14 1994-02-17 Teves Gmbh Alfred Verfahren und Schaltungsanordnung zur Verringerung nachteiliger Auswirkungen von Motorschleppmomenten
AUPN072495A0 (en) * 1995-01-24 1995-02-16 Orbital Engine Company (Australia) Proprietary Limited A method for controlling the operation of an internal combustion engine of a motor vehicle
DE19518813C1 (de) * 1995-05-23 1996-12-19 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung des Drehmoments einer Brennkraftmaschine
DE19547717B4 (de) * 1995-12-20 2006-07-13 Robert Bosch Gmbh Verfahren und Vorrichtung zur Abschwächung von Lastwechselreaktionen bei einem Kraftfahrzeug
DE69722562T2 (de) * 1996-07-24 2004-05-06 Denso Corp., Kariya Regelsystem für einen Fahrzeugbewegungszustand
DE19836845B4 (de) * 1998-08-14 2009-04-09 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung einer Antriebseinheit eines Kraftfahrzeugs
WO2001040041A1 (fr) 1999-12-03 2001-06-07 Robert Bosch Gmbh Procede pour influencer un couple fourni par un moteur d'entrainement d'un vehicule
US6516778B1 (en) 2000-09-26 2003-02-11 Ford Global Technologies, Inc. Engine airflow control
US6945910B1 (en) 2000-09-26 2005-09-20 Ford Global Technologies, Llc Vehicle trajectory control system
US6434467B1 (en) 2000-09-26 2002-08-13 Ford Global Technologies, Inc. Vehicle control method for vehicle having a torque converter
GB2368924B (en) 2000-09-26 2004-12-15 Ford Global Tech Inc A method and apparatus for controlling a powertrain
US6506140B1 (en) 2000-09-26 2003-01-14 Ford Global Technologies, Inc. Control for vehicle with torque converter
US6600988B1 (en) 2000-09-26 2003-07-29 Ford Global Technologies, Inc. Vehicle trajectory control system and method
JP4424408B2 (ja) 2007-10-26 2010-03-03 トヨタ自動車株式会社 車載内燃機関の制御装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS602508B2 (ja) * 1977-07-15 1985-01-22 株式会社デンソー 電子制御式燃料噴射装置の燃料停止装置
DE2801790A1 (de) * 1978-01-17 1979-07-19 Bosch Gmbh Robert Verfahren und einrichtung zur steuerung der kraftstoffzufuhr zu einer brennkraftmaschine
US4245599A (en) * 1979-12-19 1981-01-20 General Motors Corporation Vehicle engine idle speed governor with unsymmetric correction rates
JPS5862335A (ja) * 1981-10-09 1983-04-13 Mazda Motor Corp エンジンのアイドル回転制御装置
JPS58143135A (ja) * 1982-02-19 1983-08-25 Toyota Motor Corp 電子制御機関の燃料噴射方法
DE3521551A1 (de) * 1985-06-15 1986-12-18 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur steuerung und/oder regelung von betriebskenngroessen einer brennkraftmaschine
JPS61294154A (ja) * 1985-06-24 1986-12-24 Honda Motor Co Ltd 内燃エンジンのアイドル回転数制御方法
FR2596806B1 (fr) * 1986-04-02 1988-07-29 Renault Procede de realimentation en carburant d'un moteur a combustion interne a la suite d'une coupure en deceleration

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8908776A1 *

Also Published As

Publication number Publication date
JPH03503077A (ja) 1991-07-11
US5113820A (en) 1992-05-19
WO1989008776A1 (fr) 1989-09-21
DE58900775D1 (de) 1992-03-05
DE3808692A1 (de) 1989-10-05
EP0406246B1 (fr) 1992-01-22

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