EP0822321B1 - Procédé pour ralentir un moteur à combustion interne à 4 temps, en particulier, lors d'une utilisation pour l'entraínement d'un véhicule - Google Patents

Procédé pour ralentir un moteur à combustion interne à 4 temps, en particulier, lors d'une utilisation pour l'entraínement d'un véhicule Download PDF

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Publication number
EP0822321B1
EP0822321B1 EP97102964A EP97102964A EP0822321B1 EP 0822321 B1 EP0822321 B1 EP 0822321B1 EP 97102964 A EP97102964 A EP 97102964A EP 97102964 A EP97102964 A EP 97102964A EP 0822321 B1 EP0822321 B1 EP 0822321B1
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
accordance
exhaust valve
triggered
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
EP97102964A
Other languages
German (de)
English (en)
Other versions
EP0822321A1 (fr
Inventor
Siegfried Sumser
Erwin Schmidt
Horst Hanauer
Werner Dr. Rumez
Eberhard Schneider
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0822321A1 publication Critical patent/EP0822321A1/fr
Application granted granted Critical
Publication of EP0822321B1 publication Critical patent/EP0822321B1/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
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking

Definitions

  • the invention relates to a method for braking a Four-stroke internal combustion engine according to the preamble of Claim 1 and a motor vehicle from one to this Method is braked internal combustion engine driven.
  • From DE-PS 34 28 626 is an actuator for an engine brake on a four-stroke internal combustion engine is known, which is arranged in the exhaust pipe throttle valve and for an additional exhaust valve for blowing off each cylinder compressed air in the exhaust pipe. In doing so when the brake pedal is operated, one or more of the additional exhaust valves opened and thus the working pressures in the or some of the cylinders decreased and then the throttle valve closed.
  • the object of the invention is to provide a method with which an internal combustion engine of the generic type faster and can be slowed down more effectively than with known engine brakes is the case. It is also the task of Invention to create a motor vehicle by one is driven according to controllable internal combustion engine and be brought to a standstill quickly, especially in an emergency can.
  • the object is achieved by the im The method described in claim 1 and by the method in claim 7 described motor vehicle solved.
  • the procedure is the time at which an early Combustion triggered and possibly an exhaust valve is opened, depending on the actuation of a wheel brake system and / or depending on the response of one Anti-lock device changeable. It gets on the piston high, driving combustion pressure exerted on the causes the internal combustion engine to brake extremely quickly.
  • the device for braking the internal combustion engine with the means for actuating the wheel brake system can be ensured, for example, that the Wheel brake system is actuated when the internal combustion engine is braked. It is provided that the intensity of the Braking the internal combustion engine, that is the time of Triggering the premature combustion and possibly the Opening the exhaust valves from the actuation of the brake pedal or, if available, the response of an anti-lock device is influenced to the greatest possible braking effect to achieve. Conversely, the wheel brake device through appropriate coupling by means of a control or Control logic simultaneously with the braking of the internal combustion engine to be activated.
  • Exhaust valves can additional, e.g. B. from said DE-PS 34 28 626th known, electrically or by a pressure medium operable Be valves or normal gas exchange exhaust valves if whose tax times can be changed so that the desired opening start is reached.
  • the triggering of premature combustion can be in Otto internal combustion engines by advancing the ignition timing accordingly take place far beyond the usual spark advance goes out, and with diesel internal combustion engine by appropriate Early injection, which in turn is way ahead of the way of the ignition delay occurs early injection. in the If necessary, one can also be used for diesel internal combustion engines Ignition aid z. B. provided in the form of a spark or glow plug become.
  • a Device proposed that a device for Early adjustment of the time at which the premature Combustion triggered and possibly an exhaust valve is opened, the early adjustment depending on the actuation of a wheel brake system and / or depending by responding to an anti-lock device.
  • the device mentioned enables the internal combustion engine to be braked depending on means of actuating the Wheel brake system and / or an anti-lock device. So is for example, ensure that the wheel brake system is actuated is when the internal combustion engine is braked in an emergency.
  • the anti-lock device responds, the Establish the greatest possible braking effect simultaneous early adjustment of the time at which the premature combustion triggered and possibly on Exhaust valve is opened.
  • the device mentioned preferably has an emergency switch to activate this facility by Actuation on the normal control for the ignition timing or control overriding the injection timing and if necessary, the exhaust valves at the right time be opened. By pressing the emergency switch possibly triggered an optical or acoustic signal become.
  • the emergency switch In a motor vehicle by an internal combustion engine is driven with the aforementioned device the emergency switch is located in the driver's compartment.
  • the emergency switch should of course be so attached that he on the one hand not accidentally and on the other hand not only from Driver, but can also be operated by a passenger.
  • a four-stroke Otto engine 1 has a cylinder block 2 with cylinders 3 and pistons 4 and a cylinder head 5 in which, in addition to the usual gas exchange inlet and exhaust valves an additional, for example pneumatically or hydraulically controlled Exhaust valve 7 (Fig. 2) is arranged.
  • the cylinder head 5 also contains the camshaft for actuating the gas exchange valves and the schematically illustrated injection and Ignition system 6, which is operated by electronics 8 in normal operation is regulated.
  • a separate electronic Regulator 9 is provided, which is operated by an emergency switch 10 activated for example in the dashboard 11 of the vehicle can be and on the one hand the ignition timing regardless of the setting by the electronics 8 in the "early" direction adjusted that the combustion in each cylinder already during the compression cycle, i.e. well before reaching the top dead center of the piston 4, is triggered, and on the other hand the additional at the end of the compression cycle Exhaust valve 7 opens. Due to premature combustion on the piston 4 a restoring combustion pressure, the causes the internal combustion engine to brake quickly. By the opening of the additional exhaust valve 7 towards the end of Compression cycle is avoided that after going through the top dead center a driving pressure force on the piston 4 acts.
  • the additional exhaust valve 7 shown in Fig. 2 blocks in the closed state, a channel 12 which is not connected to the cylinder space shown is connected and from which a Channel 13 goes out to the outlet channel, not shown the internal combustion engine 1 or to the turbine of an exhaust gas turbocharger is guided, the one adapted to the braking operation can have a narrow flow cross-section.
  • the valve 7 is acted upon by a spring 14 in the closing direction and carries a control piston 15 which is slidable in one Cylinder 16 sits and a pressure chamber 18 with a cover 17 limited by a port 19 a pressure medium can be supplied to open the valve 7.
  • the Supply of the pressure medium is controlled by the controller 9.
  • the additional outlet valve 7 can be omitted if the Internal combustion engine with a valve train with variable Control times is equipped and the gas exchange exhaust valves can be controlled by the controller 9 so that they are opened at the end of the compression cycle.
  • the controller 9 can activate a signal device 20 which when actuating the emergency switch 10, an optical or acoustic signal triggers
  • the controller 9 does not need the injection and Ignition system 6 to act, but it can instead have a Line 28 are connected to the electronics 8 and this influence accordingly ..
  • combustion occurs triggered during the compression stroke that the Fuel injection accordingly long before reaching the top dead center of the piston.
  • an ignition aid e.g. in the form of a spark or glow plug be provided.
  • the braking of the internal combustion engine can still do so be accelerated that the dynamic pressure in the exhaust pipe is increased, e.g. through a throttle valve in the exhaust line or with an internal combustion engine an exhaust gas turbocharger, the turbine with a variable Guide vane is provided by adjusting it (see e.g. DE-C 42 32 400).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Valve Device For Special Equipments (AREA)

Claims (10)

  1. Procédé pour ralentir un moteur à combustion interne à quatre temps, en particulier pour entraíner un véhicule automobile, comportant au moins une soupape d'échappement pour chaque cylindre, dans lequel
    la combustion dans les cylindres est déclenchée pendant le temps de compression, de sorte que
    avant d'atteindre le point mort haut des pistons dans les cylindres, une montée de pression provoquant le ralentissement du moteur à combustion interne a lieu,
    caractérisé en ce que
    l'instant auquel la combustion précoce est déclenchée et le cas échéant une soupape d'échappement (7) est ouverte, est variable
    en fonction de l'actionnement d'une installation de freinage de roues (22), et/ou
    en fonction de la réaction d'un dispositif d'anti-blocage (26).
  2. Procédé selon la revendication 1, caractérisé en ce que vers la fin du temps de compression, au moins une soupape d'échappement pour chaque cylindre est ouverte.
  3. Procédé selon la revendication 2, caractérisé en ce que l'on prévoit à titre de soupape d'échappement une soupape supplémentaire.
  4. Procédé selon l'une au moins des revendications 2 et 3, caractérisé en ce que l'on prévoit à titre de soupape d'échappement une soupape d'échange de gaz dont les temps de commande sont variables.
  5. Procédé selon l'une au moins des revendications 1 à 4, caractérisé en ce que le déclenchement de la combustion précoce s'effectue par allumage externe pendant le temps de compression.
  6. Procédé selon l'une au moins des revendications 1 à 5, caractérisé en ce que dans un moteur à combustion interne diesel, l'injection de carburant s'effectue si loin avant le point mort haut des pistons qu'une montée en pression de ralentissement a lieu dans les chambres de combustion de par la combustion précoce pendant le temps de compression.
  7. Véhicule automobile comportant un moteur à combustion interne à quatre temps, comportant au moins une soupape d'échappement (7) pour chaque cylindre, dans lequel la combustion dans les cylindres est déclenchée pendant le temps de compression, de sorte qu'avant d'atteindre le point mort haut des pistons dans les cylindres, une montée de pression provoquant le ralentissement du moteur à combustion interne a lieu, caractérisé par
    un dispositif (9) pour le réglage avancé de l'instant auquel la combustion précoce est déclenchée et le cas échéant une soupape d'échappement (7) est ouverte, dans lequel le réglage avancé s'effectue
    en fonction de l'actionnement d'une installation de freinage de roues (22), et/ou
    en fonction de la réaction d'un dispositif d'anti-blocage (26).
  8. Véhicule automobile selon la revendication 7, caractérisé en ce qu'un commutateur de secours (10) est associé au dispositif (9), et en ce qu'il est agencé dans l'habitacle.
  9. Véhicule automobile selon la revendication 8, caractérisé en ce qu'un dispositif de signalisation optique ou acoustique (20) est déclenché lors de l'actionnement du commutateur de secours (10).
  10. Véhicule automobile selon l'une ou l'autre des revendications 8 et 9, caractérisé en ce que l'installation de freinage des roues (22) peut être activée simultanément avec l'actionnement du commutateur de secours (10).
EP97102964A 1996-04-16 1997-02-24 Procédé pour ralentir un moteur à combustion interne à 4 temps, en particulier, lors d'une utilisation pour l'entraínement d'un véhicule Expired - Lifetime EP0822321B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19614923A DE19614923C2 (de) 1996-04-16 1996-04-16 Kraftfahrzeug mit einer Zusatzbremseinrichtung und Verfahren zum Notfall- Abbremsen eines derartigen Kraftfahrzeuges
DE19614923 1996-04-16

Publications (2)

Publication Number Publication Date
EP0822321A1 EP0822321A1 (fr) 1998-02-04
EP0822321B1 true EP0822321B1 (fr) 2002-09-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97102964A Expired - Lifetime EP0822321B1 (fr) 1996-04-16 1997-02-24 Procédé pour ralentir un moteur à combustion interne à 4 temps, en particulier, lors d'une utilisation pour l'entraínement d'un véhicule

Country Status (2)

Country Link
EP (1) EP0822321B1 (fr)
DE (2) DE19614923C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014193349A1 (fr) * 2013-05-29 2014-12-04 International Engine Intellectual Property Company, Llc Frein moteur

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717068C1 (de) * 1997-04-23 1998-06-18 Daimler Benz Ag Brennkraftmaschine
DE19802626C1 (de) * 1998-01-24 1998-12-17 Daimler Benz Ag Verfahren zum Betreiben einer Brennkraftmaschine
FR2795133B1 (fr) * 1999-06-18 2002-07-12 Renault Procede de commande d'un moteur a combustion en vue de l'obtention d'un effet de frein moteur
DE19951592B4 (de) * 1999-10-27 2006-05-18 Daimlerchrysler Ag Vorrichtung zur Regelung der Bremsleistung einer Brennkraftmaschine
US6336447B1 (en) * 2000-05-08 2002-01-08 Mack Trucks, Inc. Method and apparatus for compression brake enhancement using fuel and an intercooler bypass
DE102010031095B4 (de) * 2010-07-08 2013-05-16 Robert Bosch Gmbh Verfahren und Steuergerät zum Betreiben eines Verbrennungsmotors
GB2613385A (en) * 2021-12-02 2023-06-07 Cummins Inc Engine braking with fuel injection for internal combustion engines

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2178152A (en) * 1938-03-14 1939-10-31 Clinton L Walker Brake cycle for internal combustion engines
US3023870A (en) * 1960-02-15 1962-03-06 Jaime K Udelman Auxiliary brake for vehicles employing ignition advance feature and exhaust valve opening advance feature
DE3332664A1 (de) * 1982-12-20 1984-01-19 Erler Karl Heinz Not-, halt-, warn- und sicherheitsvorrichtung fuer kraftfahrzeuge mit verbrennungsmotor
DE3319025A1 (de) * 1983-05-26 1984-11-29 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur begrenzung der drehzahl von brennkraftmaschinen
DE3428626A1 (de) * 1984-08-03 1986-02-13 Daimler-Benz Ag, 7000 Stuttgart Viertakt-brennkraftmaschine
DE3734489A1 (de) * 1987-08-26 1989-04-20 Herbert Haedrich Notfall-bremsanordnung fuer lkw oder dergleichen fahrzeug
DE3728515A1 (de) * 1987-08-26 1989-03-16 Herbert Haedrich Notfall-bremsanordnung fuer lkw oder dergleichen fahrzeug
EP0320536A1 (fr) * 1987-12-15 1989-06-21 Van Doorne's Bedrijfswagenfabriek DAF B.V. Frein à compression d'un moteur
DE3900739A1 (de) * 1989-01-12 1990-07-19 Man Nutzfahrzeuge Ag Verfahren zur steigerung der motorbremsleistung bei viertakt-hubkolben-brennkraftmaschinen
DE4125831A1 (de) * 1991-08-03 1992-10-15 Daimler Benz Ag Motorbremse
DE4425956C2 (de) * 1994-07-21 1997-06-05 Daimler Benz Ag Verfahren und Vorrichtung zum Betreiben eines Dieselmotors
US5634447A (en) * 1996-03-07 1997-06-03 Navistar International Transportation Corp. Electronic fuel injection augmentation of an engine compression brake

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014193349A1 (fr) * 2013-05-29 2014-12-04 International Engine Intellectual Property Company, Llc Frein moteur

Also Published As

Publication number Publication date
DE19614923C2 (de) 1999-05-06
DE19614923A1 (de) 1997-10-23
EP0822321A1 (fr) 1998-02-04
DE59708241D1 (de) 2002-10-24

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