EP0370216B1 - Motorbremse mit einem im Zylinderkopf der Bernnkraftmaschine angeordneten Drosselventil - Google Patents

Motorbremse mit einem im Zylinderkopf der Bernnkraftmaschine angeordneten Drosselventil Download PDF

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Publication number
EP0370216B1
EP0370216B1 EP89118572A EP89118572A EP0370216B1 EP 0370216 B1 EP0370216 B1 EP 0370216B1 EP 89118572 A EP89118572 A EP 89118572A EP 89118572 A EP89118572 A EP 89118572A EP 0370216 B1 EP0370216 B1 EP 0370216B1
Authority
EP
European Patent Office
Prior art keywords
valve
cylinder head
recess
gas
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
EP89118572A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0370216A1 (de
Inventor
Eckhard Weiss
Harald Dr. Däuble
Günter Fleckenstein
Gerhard Richter
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 EP0370216A1 publication Critical patent/EP0370216A1/de
Application granted granted Critical
Publication of EP0370216B1 publication Critical patent/EP0370216B1/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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats
    • 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 an internal combustion engine with gas exchange valves arranged in the cylinder head and at least one further throttle valve for engine braking according to the further features specified in the preamble of the single patent claim.
  • the throttle valve installed in the cylinder head is a poppet valve, which controls a valve opening in the cylinder head bottom, via which gas compressed in the cylinder during engine braking is displaced into an exhaust port.
  • the throttle valve is controlled by a control piston that is pressurized with compressed oil or compressed air, which is guided in a control bore in the cylinder head and rests on the valve stem.
  • the valve opening with the valve seat is arranged offset in a recess in the cylinder head base with respect to the base surface.
  • the recess is kept small for reasons of fuel consumption and exhaust gas emission.
  • a relatively narrow annular gap thus results between the valve plate and the recess, through which the gas must be displaced when the valve is open. This leads to strong flow diversions or flow constrictions in the area of the valve plate, through which such high gas forces can arise on the valve that, particularly in the TDC area, the opening force is overcome and the valve is suddenly moved into the closed position.
  • the invention has for its object to develop the generic internal combustion engine such that an improved flow around the throttle valve plate is achieved in the open valve position.
  • the recess is provided with an extension directed towards the combustion chamber surface, that the extension is formed by countersinking the wall surrounding the recess and that the countersink is continuous over the entire depth of the recess, including the sealing surface of the valve seat extends.
  • 1 denotes a cylinder head of a diesel engine, not shown.
  • the cylinder head 1 contains a throttle valve 2 designed as a poppet valve.
  • the throttle valve 2 is part of an engine brake device and controls a valve opening 4 located in the cylinder head base 3.
  • the throttle valve is actuated by a control piston 5, which is located in a bore 6 in the cylinder head 1 is guided and rests on the valve stem 7.
  • the control piston 5 With actuation of an engine brake switch, the control piston 5 with a pressure medium, for. B. oil or compressed air and moves the throttle valve 2 in the open position.
  • the gas previously compressed by the piston in the cylinder can thus be throttled through the valve opening 4 and displaced into an outlet duct 8 of the engine.
  • valve opening 4 with the valve seat 10 is arranged offset in a recess 11 in the cylinder head base 3 with respect to its surface 12 on the combustion chamber side.
  • the recess 11 is provided with an extension 14 directed towards the surface 12.
  • the extension 14 is formed by countersinking the wall surrounding the recess 11 and extends over the entire depth of the recess 11, including the sealing surface of the valve seat 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
EP89118572A 1988-11-23 1989-10-06 Motorbremse mit einem im Zylinderkopf der Bernnkraftmaschine angeordneten Drosselventil Expired - Lifetime EP0370216B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3839450 1988-11-23
DE3839450A DE3839450A1 (de) 1988-11-23 1988-11-23 Motorbremse mit einem im zylinderkopf der brennkraftmaschine angeordneten drosselventil

Publications (2)

Publication Number Publication Date
EP0370216A1 EP0370216A1 (de) 1990-05-30
EP0370216B1 true EP0370216B1 (de) 1993-07-07

Family

ID=6367666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118572A Expired - Lifetime EP0370216B1 (de) 1988-11-23 1989-10-06 Motorbremse mit einem im Zylinderkopf der Bernnkraftmaschine angeordneten Drosselventil

Country Status (3)

Country Link
EP (1) EP0370216B1 (enrdf_load_stackoverflow)
JP (1) JPH02181013A (enrdf_load_stackoverflow)
DE (2) DE3839450A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4018485A1 (de) * 1990-06-09 1991-12-12 Daimler Benz Ag Brennkraftmaschine mit einem in einem zylinderkopf befindlichen drosselventil
DE19839420A1 (de) * 1998-08-29 2000-03-02 Deutz Ag Motorbremseinrichtung für eine Brennkraftmaschine
DE102008012907B4 (de) 2008-03-06 2025-02-13 Mercedes-Benz Group AG Verfahren zum Gewinnen von Energie aus einem Abgasstrom sowie Kraftfahrzeug
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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1733696A (en) * 1927-03-28 1929-10-29 Ricardo Harry Ralph Valve for internal-combustion engines
AT183601B (de) * 1951-08-31 1955-10-25 Hans Dipl Ing Dr Techn List Einrichtung zum Bremsen von Fahrzeugen mit schlitzgesteuerten Zweitakt-Brennkraft-maschinen
DE1295274B (de) * 1962-04-05 1969-05-14 Humber Ltd Ladungswechselkanal im Zylinder oder Zylinderkopf einer Brennkraftmaschine
US3520287A (en) * 1968-08-09 1970-07-14 White Motor Corp Exhaust valve control for engine braking system
JPS61159635U (enrdf_load_stackoverflow) * 1985-03-25 1986-10-03
JPH01500920A (ja) * 1986-05-21 1989-03-30 ベネット、オートモーティブ、テクノロジー、プロプライエタリ、リミテッド 気体燃料を使用するエンジンの改良

Also Published As

Publication number Publication date
JPH0432207B2 (enrdf_load_stackoverflow) 1992-05-28
JPH02181013A (ja) 1990-07-13
DE3839450A1 (de) 1990-05-31
DE3839450C2 (enrdf_load_stackoverflow) 1991-09-19
DE58904870D1 (de) 1993-08-12
EP0370216A1 (de) 1990-05-30

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