[go: up one dir, main page]

WO1999006678A1 - Systeme de commande de soupapes d'un moteur a combustion pouvant etre commute en mode entrainement ou en mode freinage - Google Patents

Systeme de commande de soupapes d'un moteur a combustion pouvant etre commute en mode entrainement ou en mode freinage Download PDF

Info

Publication number
WO1999006678A1
WO1999006678A1 PCT/DE1998/001925 DE9801925W WO9906678A1 WO 1999006678 A1 WO1999006678 A1 WO 1999006678A1 DE 9801925 W DE9801925 W DE 9801925W WO 9906678 A1 WO9906678 A1 WO 9906678A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
camshaft
valve
camshafts
cam
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.)
Ceased
Application number
PCT/DE1998/001925
Other languages
German (de)
English (en)
Inventor
Volker Korte
Walter Krepulat
Martin Lechner
Christoph Steinmetz
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.)
Mwp Mahle-Jwizemann-Pleuco GmbH
Original Assignee
Mwp Mahle-Jwizemann-Pleuco 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 Mwp Mahle-Jwizemann-Pleuco GmbH filed Critical Mwp Mahle-Jwizemann-Pleuco GmbH
Priority to JP2000505408A priority Critical patent/JP2001512206A/ja
Priority to EP98943670A priority patent/EP1000226A1/fr
Priority to BR9811812-9A priority patent/BR9811812A/pt
Publication of WO1999006678A1 publication Critical patent/WO1999006678A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L13/0047—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other

Definitions

  • Valve control of an internal combustion engine that can be switched as a drive or brake
  • the invention relates to a valve control of an internal combustion engine which can be switched as a drive or a brake according to the preamble of claim 1.
  • a corresponding valve control is shown in Fig. 4 of EP 458857. It is hereby expressly incorporated by reference and is considered part of the present disclosure.
  • Three valves are arranged in a cylinder head, an intake valve, an exhaust valve and a decompression valve which is only open when the engine brake is activated and which connects to the exhaust system. Each valve is operated via its own camshaft.
  • a switchable plunger sits between the decompression valve and the assigned camshaft, which transmits the cam movement to the decompression valve only in engine braking mode.
  • the disadvantage of the described engine brake is that, depending on the speed, a non-controllable braking power is provided which is essentially determined by the stroke volume, towing power and by the design of the valves, the valve train and the brake flap.
  • the present invention is therefore concerned with the problem of valve control as a drive or Brake switchable internal combustion engine to adapt the braking power provided by an engine brake to different requirements. This problem is solved by the characterizing features of claim 1.
  • Brake cam shaft is to be understood here as meaning both an additional camshaft and one or more brake cams arranged coaxially on the main camshaft and adjustable in their phase position.
  • the brake camshaft can be switched on in a known manner by reducing the valve clearance or by means of a switchable valve lever or tappet, as in EP 458857.
  • Gearboxes for changing the relative phase position of camshafts are known for varying the charge exchange. B. from EP 396280 and EP 202682.
  • Controlling the engine braking power by adjusting the engine brake flap installed in the exhaust tract is also known. However, only a part of the braking power delivered by the engine brake can be controlled.
  • a further part of the braking power can be variably adjusted by the present invention.
  • the desired braking power is set by setting the corresponding phase shift. If only a small braking power is required, the valve causing the decompression either opens well before TDC or only after TDC, so that part of the compression work is not applied in the first case and is recovered by expansion in the second case before decompression begins.
  • a particularly advantageous embodiment of the invention is specified by claim 2.
  • Cams of both shafts assigned to each other act on only one, two common levers. No switching device is then required to switch on the brake valve, the brake camshaft becomes effective solely through the phase shift between the two camshafts or remains ineffective in a certain range of the phase shift.
  • both shafts run roughly in phase, both cams try to contact the valve lever at the same time.
  • the cam of the brake camshaft does not make contact with the valve lever, since the lever is rotated by the cam of the main camshaft out of the effective range of the cam of the brake camshaft.
  • Fig. 1 shows a schematic diagram of the valve control according to the invention
  • Fig. 2 shows the phase position of the main cam and brake cam in engine operation
  • Fig. 3 shows the phase relationship of the main cam and brake cam in braking operation
  • Fig. 4 shows the arrangement of a coaxially adjustable in its phase position brake cam on the main camshaft in cross section.
  • the brake flap in the exhaust system that is regularly present in engine brake systems is not shown in the drawing.
  • FIGS. 2 and 3 each show the opening curve of the exhaust valve as a function of the crankshaft angle in the upper area, and the relative position of the camshafts to one another in the lower area.
  • the dotted curve shows the opening curve of the exhaust valve generated by the brake camshaft.
  • a valve lever 4 which can be actuated by a main camshaft 5 and a brake camshaft 6.
  • the phase position of both camshafts can be rotated with respect to one another by a phase adjustment gearbox P (indicated by arrows to the camshafts starting from P).
  • the brake camshaft 6 is ineffective because both Rotate shafts 5 and 6 in phase and the cam 7 of the main camshaft 5 lifts the valve lever 4 so far that the clearance S is present between the cam 8 of the brake camshaft 6 and the valve lever 4.
  • phase shift Ph of the brake camshaft 6 With a phase shift Ph of the brake camshaft 6, the cam 8 also takes effect.
  • the phase shift Ph between the main camshaft 5 and the brake camshaft 6 is set so that the brake camshaft 6 actuates the exhaust valve 3 at approximately the end of the compression stroke in order to achieve the maximum braking power.
  • the braking power of the motor brake can be adapted to the respective requirements by varying the phase shift Ph.
  • the valve lever can also be fork-shaped, with both camshafts engaging different forks.
  • One camshaft can also contact the valve lever from below and the other from above.
  • Fig. 2 is the phase position of the cams in engine operation
  • FIG. 4 shows the arrangement of a brake cam 6, 8, which is displaceable in its phase position by a phase adjustment gear P, on a main camshaft 5.
  • the cam of the main camshaft has the reference number 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

L'invention concerne un système de commande de soupapes d'un moteur à combustion pouvant être commuté en mode entraînement ou en mode freinage, ledit système comportant un arbre à cames de freinage et un arbre à cames principal agissant tous les deux sur les soupapes d'échappement. L'invention vise à permettre d'adapter la puissance du freinage du moteur à différentes exigences. A cet effet les deux arbres à cames sont montés de façon à pouvoir être déphasés l'un par à rapport à l'autre au moyen d'un mécanisme de déphasage. Lorsqu'une faible puissance de freinage seulement est requise, la décompression s'effectue déjà nettement avant le point mort haut ou seulement après ce dernier, de sorte qu'une partie de la décompression ne doit pas nécessairement être appliquée dans le premier cas, et est récupérée par expansion dans le deuxième cas.
PCT/DE1998/001925 1997-08-01 1998-07-06 Systeme de commande de soupapes d'un moteur a combustion pouvant etre commute en mode entrainement ou en mode freinage Ceased WO1999006678A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2000505408A JP2001512206A (ja) 1997-08-01 1998-07-06 駆動装置またはブレーキ装置として切替可能な内燃機関の弁制御装置
EP98943670A EP1000226A1 (fr) 1997-08-01 1998-07-06 Systeme de commande de soupapes d'un moteur a combustion pouvant etre commute en mode entrainement ou en mode freinage
BR9811812-9A BR9811812A (pt) 1997-08-01 1998-07-06 Sistema de controle de válvula de uma máquina de combustão interna que pode ser ligada como acionamento ou como freio

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997133322 DE19733322A1 (de) 1997-08-01 1997-08-01 Ventilsteuerung einer als Antrieb oder Bremse schaltbaren Brennkraftmaschine
DE19733322.2 1997-08-01

Publications (1)

Publication Number Publication Date
WO1999006678A1 true WO1999006678A1 (fr) 1999-02-11

Family

ID=7837707

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/001925 Ceased WO1999006678A1 (fr) 1997-08-01 1998-07-06 Systeme de commande de soupapes d'un moteur a combustion pouvant etre commute en mode entrainement ou en mode freinage

Country Status (5)

Country Link
EP (1) EP1000226A1 (fr)
JP (1) JP2001512206A (fr)
BR (1) BR9811812A (fr)
DE (1) DE19733322A1 (fr)
WO (1) WO1999006678A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10116143A1 (de) * 2001-03-30 2002-10-10 Man Nutzfahrzeuge Ag Motorbremse
DE10116300A1 (de) 2001-03-31 2002-10-02 Mahle Ventiltrieb Gmbh Einrichtung zum Betätigen der Gaswechselventile eines Verbrennungsmotors und Verfahren zur Handhabung dieser Einrichtung
EP1649148B1 (fr) * 2004-07-17 2006-12-13 MAHLE Ventiltrieb GmbH Dispositif de commande pour une soupape, en particulier pour une soupape de renouvellement des gaz d'un moteur à combustion interne
DE102006002145A1 (de) * 2006-01-17 2007-07-19 Daimlerchrysler Ag Gaswechselventilbetätigungsvorrichtung
DE102007007758A1 (de) * 2007-02-16 2008-08-21 Mahle International Gmbh Ventiltrieb eines Hubkolben-Verbrennungsmotors
DE102007038078A1 (de) * 2007-08-11 2009-02-12 Daimler Ag Gaswechselventilbetätigungsvorrichtung
DE102017201343A1 (de) 2017-01-27 2018-08-02 Mahle International Gmbh Ventiltrieb für eine Hubkolbenbrennkraftmaschine und Verfahren zur Ventilsteuerung in einer Hubkolbenbrennkraftmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR706233A (fr) * 1930-02-15 1931-06-20 Dispositif de commande de soupapes
US2907311A (en) * 1957-09-04 1959-10-06 Waldron Frederic Barnes Valve operating mechanism of reciprocating internal combustion engines
EP0202682A2 (fr) 1985-05-22 1986-11-26 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Dispositif de modification de l'angle entre des arbres de commande, spécialement entraînés par le vilebrequin, pour les soupapes d'un moteur à combustion interne
EP0396280A1 (fr) 1989-05-03 1990-11-07 Jaguar Cars Limited Dispositif d'entraînement d'arbre à cames
EP0458857A1 (fr) 1989-02-15 1991-12-04 Volvo Ab Procede et dispositif servant au freinage moteur d'un moteur a combustion interne a quatre temps.
EP0818612A1 (fr) * 1996-07-10 1998-01-14 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Dispositif de frein moteur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2832526A1 (de) * 1978-07-25 1980-02-07 Maschf Augsburg Nuernberg Ag Viertakt-brennkraftmaschine mit motor-auspuffbremse
DE3509094A1 (de) * 1984-04-06 1985-10-17 Volkswagenwerk Ag, 3180 Wolfsburg Einrichtung zum stufenlosen verstellen der steuerzeiten von gaswechselventilen
DE3624827A1 (de) * 1986-07-23 1988-02-04 Sueddeutsche Kolbenbolzenfabri Verstelleinrichtung fuer eine nockenwelle zum steuern der gasein- und auslassventile von verbrennungsmotoren
DE3933943A1 (de) * 1988-10-28 1990-05-03 Volkswagen Ag Einrichtung zum stufenlosen verstellen der steuerzeiten von gaswechselventilen
DE4441946A1 (de) * 1994-11-25 1996-05-30 Hansbernd Berzheim Vorrichtung zur beliebig großen stufenlosen Phasenverschiebung einer Nockenwelle eines Hubkolben-Motors
DE19515496A1 (de) * 1995-04-27 1995-10-05 Steffen Kirsch Radial verschiebbare Nockenwelle für Verbrennungsmotoren

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR706233A (fr) * 1930-02-15 1931-06-20 Dispositif de commande de soupapes
US2907311A (en) * 1957-09-04 1959-10-06 Waldron Frederic Barnes Valve operating mechanism of reciprocating internal combustion engines
EP0202682A2 (fr) 1985-05-22 1986-11-26 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Dispositif de modification de l'angle entre des arbres de commande, spécialement entraînés par le vilebrequin, pour les soupapes d'un moteur à combustion interne
EP0458857A1 (fr) 1989-02-15 1991-12-04 Volvo Ab Procede et dispositif servant au freinage moteur d'un moteur a combustion interne a quatre temps.
EP0396280A1 (fr) 1989-05-03 1990-11-07 Jaguar Cars Limited Dispositif d'entraînement d'arbre à cames
EP0818612A1 (fr) * 1996-07-10 1998-01-14 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Dispositif de frein moteur

Also Published As

Publication number Publication date
EP1000226A1 (fr) 2000-05-17
JP2001512206A (ja) 2001-08-21
DE19733322A1 (de) 1999-02-04
BR9811812A (pt) 2000-08-15

Similar Documents

Publication Publication Date Title
EP3033501B1 (fr) Dispositif d'actionnement de soupape permettant de modifier la course de soupape
EP0736672B1 (fr) Procédé de freinage moteur pour moteur à combustion interne à quatre temps
DE112004001450B4 (de) Vorrichtung für eine Brennkraftmaschine
DE69605804T2 (de) Viertakt brennkraftmaschinen mit zweitakt-motorbremsung durch entlastung der kompression
DE69329064T2 (de) Verfahren zur motorbremsung einer mehrzylinderbrennkraftmaschine
DE3014005C2 (fr)
DE69600937T2 (de) Verstellung der Nockenwellenphase für Zylinderabschaltung
DE60223846T2 (de) Vorrichtung für einen verbrennungsmotor
DE69003094T2 (de) Verfahren und vorrichtung zum bremsen eines viertaktverbrennungsmotors.
DE3922884C2 (fr)
DE3427092A1 (de) Ventilsteuerung fuer verbrennungsmotoren, insbesondere eine steuerung fuer die einlassventile von verbrennungsmotoren
DE4135965C2 (de) Brennkraftmaschine mit variabler Nockensteuerung
DE19548389A1 (de) Verstellvorrichtung für den Hubverlauf eines Gaswechselventils einer Brennkraftmaschine
CH625016A5 (fr)
EP1331382B1 (fr) Procédé, programme informatique et appareil de commande et/ou regulation destinés à l'utilisation d'un moteur à combustion interne, et moteur à combustion interne
DE1911351A1 (de) Motorbremssystem fuer ein Kraftfahrzeug
WO1999006678A1 (fr) Systeme de commande de soupapes d'un moteur a combustion pouvant etre commute en mode entrainement ou en mode freinage
EP1306527B1 (fr) Moteur diesel à rapport de compression variable
WO2022040711A1 (fr) Dispositif d'actionnement de soupape
DE3026529A1 (de) Motorbremse fuer eine verbrennungskraftmaschine
AT524195B1 (de) Ventilbetätigungsvorrichtung mit Schaltvorrichtung
EP1375843B1 (fr) Moteur à combustion interne
EP3887656A1 (fr) Mécanisme de distribution à course variable présentant au moins deux positions de travail
EP1608852B1 (fr) Dispositif d'actionnement variable des soupapes d'echange des gaz de moteurs a combustion interne et procede permettant de faire fonctionner un dispositif de ce type
DE3204841A1 (de) Hubkolben-brennkraftmaschine mit einer vorrichtung zur winkelverstellung der nockenwellen relativ zueinander

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 1998943670

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 09463876

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: 1998943670

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1998943670

Country of ref document: EP