EP0089409B1 - Système de coupure d'alimentation en carburant dans un moteur à combustion interne - Google Patents

Système de coupure d'alimentation en carburant dans un moteur à combustion interne Download PDF

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Publication number
EP0089409B1
EP0089409B1 EP82110803A EP82110803A EP0089409B1 EP 0089409 B1 EP0089409 B1 EP 0089409B1 EP 82110803 A EP82110803 A EP 82110803A EP 82110803 A EP82110803 A EP 82110803A EP 0089409 B1 EP0089409 B1 EP 0089409B1
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EP
European Patent Office
Prior art keywords
speed
combustion engine
control system
idle
internal combustion
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
EP82110803A
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German (de)
English (en)
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EP0089409A1 (fr
Inventor
Harald Collonia
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.)
Mannesmann VDO AG
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Mannesmann VDO AG
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Publication date
Application filed by Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of EP0089409A1 publication Critical patent/EP0089409A1/fr
Application granted granted Critical
Publication of EP0089409B1 publication Critical patent/EP0089409B1/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
    • 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
    • F02D31/005—Electric control of rotation speed controlling air supply for idle speed control by controlling a throttle by-pass
    • 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
    • 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
    • F02D2011/101—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 means for actuating the throttles
    • F02D2011/102—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 means for actuating the throttles at least one throttle being moved only by an electric actuator

Definitions

  • the invention relates to a device for switching off the fuel supply to an internal combustion engine - in particular with an injection pump in the overrun mode of a motor vehicle - with a shut-off element controlled in dependence on the drop in speed of the internal combustion engine, in particular a solenoid valve, of a fuel cut-off system for switching the fuel supply off and on again, whereby the fuel cut-off signal is provided by the fuel cut-off system.
  • the internal combustion engine is again supplied with fuel in order to prevent the engine from dying due to the lack of an ignitable mixture when the speed drops further below the idling speed.
  • Such a device is also known (US-A-3 868 933), in which the fuel supply to the internal combustion engine is switched off when the engine is coasting at a first speed threshold and the fuel supply is restarted at a second switch-on threshold which is at a lower speed becomes.
  • the restart threshold is in any case higher than the idling speed, since due to the dead time behavior of the internal combustion engine, it only produces power some time after an ignitable mixture has been fed in.
  • the desired fuel saving is now greater, the lower the restart threshold, i. H. the closer the restart speed can be moved to the idling speed.
  • This timing element must be matched to the characteristics of the internal combustion engine, on the one hand to achieve an optimal reduction of the restart threshold depending on the speed of the speed drop, but on the other hand to ensure that a safety margin remains even when the tolerance limits of the restart speed and idling speed are unfavorable, i.e. H. the idle speed is never undercut.
  • This facility is relatively complex, in particular because of the differentiating timing element and its setting. Nevertheless, unnecessary fuel is still consumed, since the device switches the fuel supply on again at a speed at a safety distance from the idling speed.
  • an idle control system is also known (DE-A-3 039 435), which has an electromagnetic actuator to actuate a slide in a bypass to the throttle valve of the internal combustion engine.
  • the idle control system ensures that a predetermined, as low as possible idle speed, at which the internal combustion engine is still running smoothly, is kept independent of disturbance variables such as temperatures of the internal combustion engine and the intake air.
  • the known idle control system is designed for optimal control of the internal combustion engine, taking into account the dynamic behavior, as a PID controller with proportional integral and differential time components. The proportions of the time behavior must be matched to the dynamic behavior of the internal combustion engine.
  • the idle control system saves fuel in idle mode, in particular in the city cycle. However, it does not completely switch off the fuel supply if the speed of the internal combustion engine falls below a predetermined switch-off speed.
  • the object of the present invention is to further improve a device for switching off the fuel supply to an internal combustion engine in such a way that, when the effort for the switch-off device is reduced, the fuel saving is improved by the distance between the restarting speed and the idling speed by utilizing the interception behavior of the idle control system is minimized.
  • complex adjustment work should be saved when the device is tuned to the dynamic behavior of the internal combustion engine.
  • shutdown element is connected to an output of an idle control system of the internal combustion engine, the timing of which has a differential component, such that the fuel supply which is switched off in overrun mode is automatically switched on again by the idle controller when the idle speed increases.
  • the idling control system is therefore used in an astonishingly simple manner at the same time as the overrun fuel cutoff for switching on the fuel supply in that an output of the idling control system is connected to the shut-off element (solenoid valve) which switches the fuel supply on or off, and the idling control system in a conventional manner with a slide in one Control slot of the bypass is connected to a throttle valve.
  • the fuel cut-off is adapted in a surprisingly simple manner to the dynamic behavior of the internal combustion engine. It has been found that the same timing behavior of the internal combustion engine as a controlled system can be assumed for both the overrun cutoff and the speed control, although the manipulated variables intervene at different points.
  • Idle speed control systems are used in a particularly advantageous manner which, according to claim 2, have a PID behavior and which, according to claim 3, control the flow in a bypass to the throttle valve in a conventional manner.
  • 1 denotes an idle controller, the first output of which is connected to an electromagnetic actuator 3 via a line 2.
  • the electromagnetic actuator adjusts a slide 4 in a control slot 5 of a bypass 6, which bridges a throttle valve 7 in an intake pipe 8.
  • the idle controller has a setpoint generator 10 which can be switched over by an idle contact 9 of the overrun fuel cutoff system for the reference variable w of the speed.
  • the reference variable is compared at a comparison point 11 with a control variable x output by a speed sensor 12 of the overrun fuel cutoff system, and the control deviation x w is formed.
  • the idle contact is connected to the mixture generator or the accelerator pedal to indicate the idle position. It switches the command variable in the usual way depending on whether the accelerator pedal is operated or not.
  • the signal flow leads from the comparison point 11 to an amplifier with a timing element 13, which has PID behavior.
  • the timing element is customarily adapted to the dynamic behavior of the internal combustion engine that is to be regulated.
  • a second output of the idle speed controller is connected via a line 14 to a solenoid valve 15 of a fuel cut-off system, which is switched into a fuel line 16.
  • the idle control system used in the circuit arrangement operates in a conventional manner, i. that is, during the starting operation and during normal driving, when the idle contact 9 is in its drawn position, the slide 4 is in the bypass 6 opening position, and during the overrun when the speed is above the idle speed and the idle contact 9 is closed, it is driven in a sense closing the bypass 6.
  • the idle control system also becomes effective for shear cut-off by actuating the solenoid valve 15.
  • the solenoid valve 15 is open in the start mode and during normal driving, otherwise the engine could not work, and is closed during the overrun mode.
  • the idle control system automatically turns on the fuel supply each time it changes the slide in the control slot in the usual way to increase the idle speed. This happens due to the differential component of the timing element in the event of a rapid drop in engine speed when the speed falls below a relatively high threshold, while the fuel supply remains switched off until the idling speed is reached when the vehicle coasts slowly.
  • an adaptive overrun cut-off is also effected at the same time, the switching thresholds of which have optimally moved towards those of the idle control, since they avoid them otherwise required safety distance match.

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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)

Claims (3)

1. Dispositif de coupure de l'alimentation en carburant d'un moteur à combustion interne - notamment à pompe d'injection pendant le dérapage d'un véhicule automobile - comportant un organe de coupure (15, 16), en particulier une électro-valve, commandé en fonction de la diminution de vitesse du moteur et destiné à couper et rétablir l'alimentation en carburant, caractérisé par le fait que l'organe de coupure (15, 16) est relié à une sortie (conducteur 14) d'un ensemble (1, 3 à 6) de régulation du ralenti du moteur, dont le comportement dans le temps présente une composante différentielle, de façon que ledit ensemble de régulation (1) rétablisse automatiquement l'alimentation en carburant, coupée pendant le dérapage, quand la vitesse de ralenti augmente.
2. Dispositif selon la revendication 1, caractérisé par le fait que l'ensemble de régulation du ralenti (1) est adapté à la caractéristique du moteur, avec composantes Proportionnelle, Intégrale et Différentielle (circuit de temporisation 13) de son comportement dans le temps.
3. Dispositif selon l'une des revendications 1 ou 2, caractérisé par le fait que l'organe de réglage électromagnétique (3) est connecté à une sortie (conducteur 2) de l'ensemble de régulation de ralenti (1) et commande un tiroir (4) disposé dans une glissière (5) d'une dérivation (6) sur un papillon (7).
EP82110803A 1982-03-18 1982-11-23 Système de coupure d'alimentation en carburant dans un moteur à combustion interne Expired EP0089409B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3209839 1982-03-18
DE3209839 1982-03-18

Publications (2)

Publication Number Publication Date
EP0089409A1 EP0089409A1 (fr) 1983-09-28
EP0089409B1 true EP0089409B1 (fr) 1989-03-29

Family

ID=6158574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82110803A Expired EP0089409B1 (fr) 1982-03-18 1982-11-23 Système de coupure d'alimentation en carburant dans un moteur à combustion interne

Country Status (2)

Country Link
US (1) US4619230A (fr)
EP (1) EP0089409B1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3521551A1 (de) * 1985-06-15 1986-12-18 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur steuerung und/oder regelung von betriebskenngroessen einer brennkraftmaschine
CH671609A5 (de) * 1985-06-24 1989-09-15 Mitsui Shipbuilding Eng Vorrichtung zum verhindern eines uebermaessigen durchflusses von gasfoermigem brennstoff durch eine einspritzduese eines dieselmotors.
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
JPS63253147A (ja) * 1987-04-09 1988-10-20 Nissan Motor Co Ltd 内燃機関のアイドル回転数制御装置
JPS63171651U (fr) * 1987-04-29 1988-11-08
DE3869475D1 (de) * 1987-06-02 1992-04-30 Siemens Ag Verfahren zur ermittlung von bewegungsvektorfeldern aus digitalen bildsequenzen.
JP2721966B2 (ja) * 1987-07-28 1998-03-04 富士重工業株式会社 内燃機関の燃料カット装置
DE3828850A1 (de) * 1988-08-25 1990-03-08 Bosch Gmbh Robert Vorrichtung zur steuerung einer betriebskenngroesse einer brennkraftmaschine
DE3832517C2 (de) * 1988-09-24 2001-03-08 Vdo Luftfahrtgeraete Werk Gmbh System zur elektrischen Übertragung einer Winkelstellung
US5371670A (en) * 1993-02-01 1994-12-06 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Three-parameter tunable tilt-integral-derivative (TID) controller
DE59608240D1 (de) * 1995-08-04 2002-01-03 Jenbacher Ag Jenbach Einrichtung zum Regeln einer Motorgrösse, insbesondere der Leistung oder der Drehzahl eines Verbrennungsmotors
US6474297B1 (en) * 2001-05-31 2002-11-05 Lai Ming De Fuel breaking/saving device for cars during coasting

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1282880A (en) * 1968-12-06 1972-07-26 Lucas Industries Ltd Systems for controlling internal combustion engine idling speeds
US3868933A (en) * 1969-11-22 1975-03-04 Volkswagenwerk Ag Combustion motor
US3906909A (en) * 1970-10-24 1975-09-23 Alfa Romeo Spa Internal combustion engine of the fuel injection type having means for reducing the emission of unburned products with the exhaust gases
JPS5270235A (en) * 1975-12-08 1977-06-11 Nissan Motor Co Ltd Cylinder number controlling system in engine
US4322947A (en) * 1977-06-23 1982-04-06 Robert Bosch Gmbh Control apparatus for a fuel supply system for mixture-compressing, externally ignited internal combustion engines
JPS5552531U (fr) * 1978-10-04 1980-04-08
US4237830A (en) * 1978-10-18 1980-12-09 General Motors Corporation Vehicle engine air and fuel mixture controller with engine overrun control
JPS56107927A (en) * 1980-01-31 1981-08-27 Nissan Motor Co Ltd Fuel feeder
DE3014712A1 (de) * 1980-04-17 1981-10-22 Robert Bosch Gmbh, 7000 Stuttgart Steuereinrichtung zum stillsetzen einer dieselbrennkraftmaschine
JPS5751918A (en) * 1980-09-16 1982-03-27 Toyota Motor Corp Control method of fuel injection in internal combustion engine
DE3039435C2 (de) * 1980-10-18 1984-03-22 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur Regelung der Leerlauf-Drehzahl von Brennkraftmaschinen
JPS57113937A (en) * 1981-01-05 1982-07-15 Toyota Motor Corp Idling speed controlling method for internal combustion engine

Also Published As

Publication number Publication date
EP0089409A1 (fr) 1983-09-28
US4619230A (en) 1986-10-28

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