EP0370215B1 - Motorbremsvorrichtung für eine Brennkraftmaschine - Google Patents

Motorbremsvorrichtung für eine Brennkraftmaschine Download PDF

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Publication number
EP0370215B1
EP0370215B1 EP89118571A EP89118571A EP0370215B1 EP 0370215 B1 EP0370215 B1 EP 0370215B1 EP 89118571 A EP89118571 A EP 89118571A EP 89118571 A EP89118571 A EP 89118571A EP 0370215 B1 EP0370215 B1 EP 0370215B1
Authority
EP
European Patent Office
Prior art keywords
control
hole
oil return
cylinder head
engine
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
EP89118571A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0370215A1 (de
Inventor
Wolf-Dietrich Prof. Körner
Thomas Harr
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 EP0370215A1 publication Critical patent/EP0370215A1/de
Application granted granted Critical
Publication of EP0370215B1 publication Critical patent/EP0370215B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries

Definitions

  • the invention relates to an engine brake device for an internal combustion engine according to the further features specified in the preamble of claim 1.
  • An engine brake device of the generic type is known from DE-OS 34 28 626.
  • the control piston inserted in the control bore of the cylinder head is actuated by compressed air. Due to the high opening and closing speed of the control piston, relatively high frictional resistances occur between the piston bore wall and there is a risk that the control piston jams in the control bore.
  • the invention has for its object to design the generic engine brake such that its function and stability is significantly improved in a structurally simple manner.
  • Lubrication of the control pistons is achieved in a simple manner by the invention without additional production expenditure, in which a part of the lubricating oil flowing out of the rocker arm space into the crankcase is branched off to the control bore.
  • the lubrication also increases the stability, since the friction between the piston and the control bore is reduced and the piston is largely prevented from becoming stuck in the control bore.
  • the lubrication achieves an additional cooling effect on the control piston, by means of which the wear of a sealing ring arranged on the control piston is reduced, which likewise contributes to an improvement in the stability.
  • the cylinder head 1 shows a cylinder head 1 of an internal combustion engine operating on the diesel principle, which closes the opening of a cylinder 2.
  • the cylinder head 1 contains a throttle valve 3 for each cylinder 2.
  • the throttle valve 3 designed as a poppet valve is guided with its valve stem 4 in the cylinder head 1 and controls a throttle opening 7 located in the cylinder head base 7 with its valve disk 5.
  • the throttle valve 3 is actuated from a control piston 8, which rests with its base plate 9 on the end of the valve stem 4 and is inserted in a stepped control bore 10 of the cylinder head 1.
  • the likewise stepped control piston is guided in the tapered part of the control bore 10 with a guide section 11 and is sealingly held in the expanded part of the control bore by means of a sealing ring 13 arranged on the upper section 12.
  • the control piston 8 is adjusted by means of compressed air, which acts on the top of the control piston 8 in a controlled manner from the start of the braking process from a brake switching valve.
  • the throttle valve 3 opens so that the gas compressed by the piston 14 in the cylinder 2 is displaced through the throttle opening 7 into the outlet channel 15.
  • the control bore 8 is provided next to a rocker arm 16.
  • Receiving bores 17 for the gas exchange valves, not shown, are arranged in the rocker arm space 16.
  • the rocker arm, also not shown, for actuating the gas exchange valves is located in the rocker arm space 16.
  • the rocker arms are mounted on rocker arm axles and are lubricated with lubricating oil from the lubricating oil circuit. The lubricating oil dripping from the bearing points into the rocker arm space 16 is drained through an oil return bore 18 into the crankcase.
  • the oil return bore 18 is provided with a connection opening 19 to the control bore 10.
  • the control piston 8 in the control bore 10 is lubricated in a structurally simple manner by part of the lubricating oil discharged from the rocker arm space 16 into the crankcase.
  • the connecting opening 19 is provided in the tapered part of the control bore 10.
  • the position of the control bore 10 is matched to the course of the oil return bore 18 in such a way that the oil return bore 18 cuts the control bore 8 in the tapered bore part.
  • the resulting common cutting line forms the edge of the connection opening 19. This connection between the bores 10 and 18 takes place in a very small space and without an additional connection channel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP89118571A 1988-11-23 1989-10-06 Motorbremsvorrichtung für eine Brennkraftmaschine Expired - Lifetime EP0370215B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3839452A DE3839452A1 (de) 1988-11-23 1988-11-23 Motorbremsvorrichtung fuer eine brennkraftmaschine
DE3839452 1988-11-23

Publications (2)

Publication Number Publication Date
EP0370215A1 EP0370215A1 (de) 1990-05-30
EP0370215B1 true EP0370215B1 (de) 1992-04-01

Family

ID=6367668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118571A Expired - Lifetime EP0370215B1 (de) 1988-11-23 1989-10-06 Motorbremsvorrichtung für eine Brennkraftmaschine

Country Status (3)

Country Link
US (1) US4930471A (enrdf_load_stackoverflow)
EP (1) EP0370215B1 (enrdf_load_stackoverflow)
DE (2) DE3839452A1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215054A (en) * 1990-10-22 1993-06-01 Jenara Enterprises Ltd. Valve control apparatus and method
SE467503B (sv) * 1990-11-23 1992-07-27 Volvo Ab Foerbraenningsmotor med kompressorfunktion
DE19839420A1 (de) * 1998-08-29 2000-03-02 Deutz Ag Motorbremseinrichtung für eine Brennkraftmaschine
US6216667B1 (en) 1999-11-12 2001-04-17 Frank J. Pekar Method and device for a supercharged engine brake
AT510528B1 (de) 2010-09-23 2012-09-15 Avl List Gmbh Viertakt-brennkraftmaschine mit einer motorbremse
AT510527B1 (de) 2010-09-23 2012-09-15 Avl List Gmbh Viertakt-brennkraftmaschine mit einer motorbremse
AT510529B1 (de) 2010-09-23 2012-10-15 Avl List Gmbh Viertakt-brennkraftmaschine mit einer motorbremse
AT518933B1 (de) 2016-07-20 2018-07-15 Avl List Gmbh Brennkraftmaschine mit einer ventilbetätigungseinrichtung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB426064A (en) * 1933-11-04 1935-03-27 Enfield Cycle Co Ltd An improved lubricating system for an internal combustion engine
US2304255A (en) * 1941-01-27 1942-12-08 Nash Kelvinator Corp Oil pan baffle
SE443021B (sv) * 1979-09-03 1986-02-10 Yanmar Diesel Engine Co Forbrenningsmotor
DE3225478C1 (de) * 1982-07-08 1983-09-29 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Brennkraftmaschine,insbesondere fuer Kraftfahrzeuge
DE3346371A1 (de) * 1983-12-22 1985-07-04 Audi AG, 8070 Ingolstadt Vorrichtung zum schmieren der schaefte von gaswechsel-ventilen im zylinderkopf einer hubkolben-brennkraftmaschine
DE3428626A1 (de) * 1984-08-03 1986-02-13 Daimler-Benz Ag, 7000 Stuttgart Viertakt-brennkraftmaschine
JPH0629530B2 (ja) * 1984-11-01 1994-04-20 ヤマハ発動機株式会社 エンジンの潤滑装置
CA1328589C (en) * 1985-08-21 1994-04-19 Honda Giken Kogyo Kabushiki Kaisha (Also Trading As Honda Motor Co., Ltd .) Oil supply system for a valve operating mechanism in internal combustion engines

Also Published As

Publication number Publication date
DE3839452A1 (de) 1990-05-31
US4930471A (en) 1990-06-05
DE3839452C2 (enrdf_load_stackoverflow) 1991-03-07
DE58901086D1 (de) 1992-05-07
EP0370215A1 (de) 1990-05-30

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