EP0370218B1 - Moteur à combustion interne à quatre temps - Google Patents

Moteur à combustion interne à quatre temps Download PDF

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Publication number
EP0370218B1
EP0370218B1 EP89118790A EP89118790A EP0370218B1 EP 0370218 B1 EP0370218 B1 EP 0370218B1 EP 89118790 A EP89118790 A EP 89118790A EP 89118790 A EP89118790 A EP 89118790A EP 0370218 B1 EP0370218 B1 EP 0370218B1
Authority
EP
European Patent Office
Prior art keywords
combustion engine
valves
brake switch
speed
internal
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
EP89118790A
Other languages
German (de)
English (en)
Other versions
EP0370218A1 (fr
Inventor
Eckhard Weiss
Horst Bergmann
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.)
Daimler Benz AG
Original Assignee
Daimler Benz 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 Daimler Benz AG filed Critical Daimler Benz AG
Publication of EP0370218A1 publication Critical patent/EP0370218A1/fr
Application granted granted Critical
Publication of EP0370218B1 publication Critical patent/EP0370218B1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Definitions

  • the invention relates to a four-stroke internal combustion engine according to the preamble of claim 1.
  • a four-stroke internal combustion engine in which braking is brought about by the fact that compressed air from the cylinder chamber is passed through additional exhaust valves, which are actuated by an adjusting device, into the exhaust port of the internal combustion engine during the entire braking process and that the exhaust gases of the internal combustion engine are throttled by a throttle valve which can be adjusted by means of an actuating device in the outlet duct of the internal combustion engine, the adjusting device and the actuating device being actuated by a directional control valve which can be adjusted as a function of the brake pedal.
  • the additional exhaust valves and the exhaust throttle valve can be actuated in any order and combination by actuating the brake pedal.
  • an engine brake is known from US-Z "Automotive Industries” from February 15, 1971, pages 45 to 52, in which the exhaust valves of the internal combustion engine are opened from the brake pedal for the engine brake operation.
  • This engine brake is also designed such that when the injection pump is delivered at zero, the actuating devices for adjusting the exhaust valves for engine brake operation are deactivated. Disadvantages are, on the one hand, the relatively high actuating forces required on the exhaust valves and, on the other hand, that further engine braking operation is not possible below a certain speed of the internal combustion engine or flow rate.
  • the object of the invention is to design an internal combustion engine of the generic type so that a safe engine braking operation in the entire speed range is ensured without disadvantage for the braking process of the vehicle.
  • the actuating devices on the engine brake of the internal combustion engine can be controlled from the brake switch via separate directional control valve.
  • a speed switch ensures that the auxiliary exhaust valves are automatically set to the closed position when the engine speed falls below a lower limit.
  • a 6-cylinder in-line internal combustion engine 1 with an exhaust port 2 is shown schematically.
  • a throttle valve 3 is provided, which can be adjusted via an actuating device 4.
  • engine braking is achieved in a known manner by opening an additional exhaust valve 5 for each of the cylinders 6 of the internal combustion engine 1.
  • These additional exhaust valves 5 each have their own actuating device 7.
  • the actuating device 4 of the throttle valve 3 can be controlled via a control line 10 by means of a directional valve 9 which is acted upon by a supply line through a supply line 8.
  • the actuating devices 7 of the additional outlet valves 5 can be controlled via a further separate directional valve 18 and a control line 11, the directional valve 18 being supplied with the auxiliary force - compressed oil or compressed air via a supply line 19.
  • Both directional control valves 9 and 18 are connected to a brake switch 21 via separate control lines 20 and 21.
  • a speed switch 13 which is connected to a speed sensor 14 provided on the internal combustion engine, is arranged in the control line 21 between the directional valve 18 and the branch to the control line 20.
  • an adjusting device 16 is actuated via the directional valve 9 and a control line 15, which interrupts the fuel delivery to the injection pump 17.
  • the speed sensor 14 arranged on the internal combustion engine 1 now recognizes the drop in the speed into the idling range by falling below a lower speed limit, the speed switch 13 is brought into its open position, which thus interrupts the actuation of the directional control valve 18.
  • the directional control valve 18 returns to its rest position (vented position), so that the pressure in the control line 11 is reduced and the additional outlet valves 5 are closed. At the same time the pressure in the control line 15 is also reduced and fuel is thus supplied to the injection pump 17.

Landscapes

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

Claims (4)

  1. Moteur à combustion interne à quatre temps (1), notamment pour la propulsion d'un véhicule automobile, comprenant, pour chaque cylindre (6), des soupapes de distribution et une soupape d'échappement additionnelle (5), commandée par un dispositif d'actionnement (7), et comprenant aussi un volet d'étranglement (3) agencé dans le conduit d'échappement (2) du moteur à combustion interne (1), et qui peut être commandé par un dispositif d'actionnement (4), les dispositifs d'actionnement (4, 7) pouvant être actionnés par au moins un distributeur réglable commandé par un contact de frein (12), et dans lequel, pendant le freinage, après l'actionnement du contact de frein (12), et en présence de vitesses de rotation supérieures à une vitesse de rotation limite prédéterminée, il se produit un freinage du moteur à combustion interne (1) par ouverture des soupapes d'échappement additionnelles (5) ainsi que par étranglement des gaz d'échappement par le volet d'étranglement (3) mis en position de fermeture,
    caractérisé
    en ce que le volet d'étranglement (3) et les soupapes d'échappement additionnelles (5) sont commandés par le contact de frein (12), par l'intermédiaire de distributeurs séparés (9 et 18),
    et en ce qu'au-dessous de la vitesse de rotation limite prédéterminée et lorsque le contact de frein (12) est actionné, les soupapes d'échappement additionelles (5) sont mises dans la position de fermeture, par un contact (13) de vitesse de rotation, par l'intermédiaire du distributeur (18) tandis que le volet d'étranglement (3) reste maintenu dans la position de fermeture par le distributeur (18) directement commandé par le contact de frein (12).
  2. Moteur à combustion interne à quatre temps selon la revendication 1,
    caractérisé
    en ce que le distributeur (9) et le distributeur (18) sont reliés au contact de frein (12) par l'intermédiaire de lignes de commande séparées (20, 21).
  3. Moteur à combustion interne selon la revendication 1, ou 2,
    caractérisé
    en ce que le contact de vitesse de rotation (13) est intercalé dans la ligne de commande (21) et ce contact est connecté à un capteur de vitesse de rotation (14) prévu sur le moteur à combustion interne (1).
  4. Moteur à combustion interne à quatre temps selon une des revendications 1 à 3,
    caractérisé
    en ce que les dispositifs d'actionnement (4, 7) peuvent être alimentés en air comprimé par l'intermédiaire de distributeurs (9, 18) commandés électriquement.
EP89118790A 1988-11-23 1989-10-10 Moteur à combustion interne à quatre temps Expired - Lifetime EP0370218B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3839449 1988-11-23
DE3839449A DE3839449A1 (de) 1988-11-23 1988-11-23 Viertakt-brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0370218A1 EP0370218A1 (fr) 1990-05-30
EP0370218B1 true EP0370218B1 (fr) 1993-05-26

Family

ID=6367665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118790A Expired - Lifetime EP0370218B1 (fr) 1988-11-23 1989-10-10 Moteur à combustion interne à quatre temps

Country Status (4)

Country Link
US (1) US5036811A (fr)
EP (1) EP0370218B1 (fr)
JP (1) JPH02181012A (fr)
DE (2) DE3839449A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038334C1 (fr) * 1990-12-01 1991-11-28 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
US5540201A (en) 1994-07-29 1996-07-30 Caterpillar Inc. Engine compression braking apparatus and method
US5647318A (en) 1994-07-29 1997-07-15 Caterpillar Inc. Engine compression braking apparatus and method
US5526784A (en) 1994-08-04 1996-06-18 Caterpillar Inc. Simultaneous exhaust valve opening braking system
DE19844571C2 (de) * 1998-09-29 2000-08-03 Daimler Chrysler Ag Motorbremsverfahren für eine aufgeladene Brennkraftmaschine
US7926464B2 (en) * 2008-02-29 2011-04-19 Caterpillar Inc. Power source braking system to prevent engine stalls
NL2007584C2 (nl) * 2011-10-12 2012-12-05 Thermass Innovations B V Plunjerpomp/-motor.

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB859800A (en) * 1958-02-21 1961-01-25 Magneti Marelli Spa Electro pneumatic servocontrol device for the exhaust brake of internal combustion engines of vehicles
DE1207704B (de) * 1961-02-21 1965-12-23 Om Societa Per Azioni Vorrichtung zum drehzahlabhaengigen selbsttaetigen Aus- bzw. Wiedereinschalten einerMotorbremse
DE3529767A1 (de) * 1975-09-06 1987-02-26 Kloeckner Humboldt Deutz Ag Motorbremsvorrichtung fuer eine brennkraftmaschine
US4223649A (en) * 1976-06-01 1980-09-23 Robinson Charles E Motor brake control system
JPS5833239Y2 (ja) * 1977-06-25 1983-07-25 株式会社ボッシュオートモーティブ システム デイ−ゼルエンジンのスト−ル防止装置
JPS57171011A (en) * 1981-04-13 1982-10-21 Mitsubishi Motors Corp Braking device for multicylinder four stroke cycle internal combustion engine
DE3428626A1 (de) * 1984-08-03 1986-02-13 Daimler-Benz Ag, 7000 Stuttgart Viertakt-brennkraftmaschine
DE3428627A1 (de) * 1984-08-03 1986-02-13 Daimler-Benz Ag, 7000 Stuttgart Viertakt-brennkraftmaschine
DE3506894A1 (de) * 1985-02-27 1986-08-28 Klöckner-Humboldt-Deutz AG, 5000 Köln Motorbremsvorrichtung fuer brennkraftmaschinen
DE3712020A1 (de) * 1987-04-09 1988-10-27 Schaeffler Waelzlager Kg Ventilsteuereinrichtung

Also Published As

Publication number Publication date
EP0370218A1 (fr) 1990-05-30
JPH02181012A (ja) 1990-07-13
JPH0432206B2 (fr) 1992-05-28
DE3839449A1 (de) 1990-05-31
US5036811A (en) 1991-08-06
DE58904491D1 (de) 1993-07-01

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