EP0089409A1 - 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
EP0089409A1
EP0089409A1 EP82110803A EP82110803A EP0089409A1 EP 0089409 A1 EP0089409 A1 EP 0089409A1 EP 82110803 A EP82110803 A EP 82110803A EP 82110803 A EP82110803 A EP 82110803A EP 0089409 A1 EP0089409 A1 EP 0089409A1
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EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
speed
idle
fuel supply
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
EP82110803A
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German (de)
English (en)
Other versions
EP0089409B1 (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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Filing date
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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    • 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 overrun mode of a motor vehicle, with a shut-off element controlled as a function of the drop in speed of the internal combustion engine, in particular a solenoid valve for switching the fuel supply off and on again.
  • the switch-on threshold is in any case higher than the idling speed, since, owing to the dead time behavior of the internal combustion engine, it generates power only some time after an ignitable mixture has been fed in. - The desired fuel saving is now greater, the lower the reclosing threshold, ie the closer the reclosing speed can be to the idling speed.
  • the difference between the idling speed and the reclosing threshold to be observed in the known devices for overrun switching is smaller, the slower the speed drops in overrun mode.
  • a so-called adaptive overrun cutoff is part of the prior art, which takes into account the speed of the speed drop. This can be achieved by a differential component of the time behavior in a transmission element between the speed sensor and the actuator, which switches the fuel on and off.
  • 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 drop in speed, 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. that 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 facility in any case switches on the fuel supply again at a speed at a safety distance from the idling speed.
  • idle regulators which actuate an electromagnetic actuator when the accelerator pedal is not actuated in order to actuate a slide in a control slot of a bypass to a throttle valve.
  • This idle controller ensures that a predetermined, as low as possible idle speed, at which the internal combustion engine is still running smoothly ("round"), is kept independent of flow variables such as temperatures of the internal combustion engine and the intake air.
  • These known idle speed controllers are constructed as PID controllers with proportional integral and differential time components for optimal control of the internal combustion engine, taking into account the dynamic behavior. The proportions of the time behavior must be matched to the dynamic behavior of the internal combustion engine. -
  • the idle controller saves fuel in idle mode, especially 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 taking advantage of the distance between the restart speed and the idling speed the interception behavior of the idle controller is minimized.
  • complex adjustment work should be carried out when the device is tuned to the dynamic behavior of the internal combustion engine be saved.
  • the idle controller is therefore used in an astonishingly simple manner at the same time for thrust shutdown, in that a second output of the idle controller is connected to the shut-off element (solenoid valve) which switches the fuel supply on or off, while a first output of the idle controller is connected in a conventional manner to a slide in a control slot 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 the controlled system can be assumed for both the overrun cutoff and the speed control, although the manipulated variables intervene at different points.
  • idle speed controllers 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.
  • the idle controller has a setpoint generator 10 which can be switched over by an idle contract 9 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, and the control deviation x w is formed.
  • the idle contract is connected to the mixer 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 continues 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 regulator is connected via a line 14 to a solenoid valve 15 which is switched into a fuel line 16.
  • the idle controller used in the circuit arrangement works in a conventional manner.
  • the idle controller 1 is also effective for overrun fuel cutoff by actuating the solenoid valve 15.
  • the fuel supply is automatically switched on by the idle controller whenever it changes the slide in the control slot in the usual way to increase the idle speed. This happens as a result of the differential component of the timing element in the event of a drop in the speed of the position when the speed falls below a relatively high threshold, while the fuel supply remains switched off until the idling speed is reached when the coasting speed is slow.
  • an adaptive overrun cutoff is also effected at the same time, the switching thresholds of which have optimally moved towards those of the idle control, since they correspond to these while avoiding an otherwise required safety distance.

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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)
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 true EP0089409A1 (fr) 1983-09-28
EP0089409B1 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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8801092A (nl) * 1987-04-29 1988-11-16 Suzuki Motor Co Inrichting voor het regelen van een carburator voor verbrandingsmotor.
DE3825538A1 (de) * 1987-07-28 1989-02-09 Fuji Heavy Ind Ltd System zur regelung der kraftstoffoerderung fuer einen kraftfahrzeugmotor
WO1990002258A1 (fr) * 1988-08-25 1990-03-08 Robert Bosch Gmbh Dispositif de regulation d'un parametre de fonctionnement d'un moteur a combustion interne
EP0240409B1 (fr) * 1986-04-02 1990-06-06 Regie Nationale Des Usines Renault Procédé de réalimentation en carburant d'un moteur à combustion interne à la suite d'une coupure en décélération

Families Citing this family (8)

* 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.
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
EP0293644B1 (fr) * 1987-06-02 1992-03-25 Siemens Aktiengesellschaft Méthode de détermination de champs de vecteurs de mouvement à partir de séquences d'images numériques
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
EP0757169B1 (fr) * 1995-08-04 2001-11-21 Jenbacher Aktiengesellschaft Dispositif pour la régulation de paramètres de moteur, en particulier la puissance ou la vitesse de rotation d'un moteur à combustion interne
US6474297B1 (en) * 2001-05-31 2002-11-05 Lai Ming De Fuel breaking/saving device for cars during coasting

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2025516A1 (fr) * 1968-12-06 1970-09-11 Brico Eng
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
GB2069180A (en) * 1980-01-31 1981-08-19 Nissan Motor Automatic control of fuel supply in ic engines

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2025516A1 (fr) * 1968-12-06 1970-09-11 Brico Eng
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
GB2069180A (en) * 1980-01-31 1981-08-19 Nissan Motor Automatic control of fuel supply in ic engines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ATZ AUTOMOBILTECHNISCHE ZEITSCHRIFT, Band 83, Nr. 5, Mai 1981, Seiten 219-222, Schwäbisch Gmünd, DE; G.R. HARTEL: "Neues Gemischbildungssystem f}r Ottomotoren". *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240409B1 (fr) * 1986-04-02 1990-06-06 Regie Nationale Des Usines Renault Procédé de réalimentation en carburant d'un moteur à combustion interne à la suite d'une coupure en décélération
NL8801092A (nl) * 1987-04-29 1988-11-16 Suzuki Motor Co Inrichting voor het regelen van een carburator voor verbrandingsmotor.
DE3825538A1 (de) * 1987-07-28 1989-02-09 Fuji Heavy Ind Ltd System zur regelung der kraftstoffoerderung fuer einen kraftfahrzeugmotor
WO1990002258A1 (fr) * 1988-08-25 1990-03-08 Robert Bosch Gmbh Dispositif de regulation d'un parametre de fonctionnement d'un moteur a combustion interne
US5048482A (en) * 1988-08-25 1991-09-17 Robert Bosch Gmbh Device for controlling an operating characteristic of an internal combustion engine

Also Published As

Publication number Publication date
US4619230A (en) 1986-10-28
EP0089409B1 (fr) 1989-03-29

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