EP0370215A1 - Engine-braking system for an internal-combustion engine - Google Patents

Engine-braking system for an internal-combustion engine Download PDF

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Publication number
EP0370215A1
EP0370215A1 EP89118571A EP89118571A EP0370215A1 EP 0370215 A1 EP0370215 A1 EP 0370215A1 EP 89118571 A EP89118571 A EP 89118571A EP 89118571 A EP89118571 A EP 89118571A EP 0370215 A1 EP0370215 A1 EP 0370215A1
Authority
EP
European Patent Office
Prior art keywords
bore
control
oil return
engine
combustion 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.)
Granted
Application number
EP89118571A
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German (de)
French (fr)
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EP0370215B1 (en
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
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Daimler Benz AG
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Filing date
Publication date
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Publication of EP0370215A1 publication Critical patent/EP0370215A1/en
Application granted granted Critical
Publication of EP0370215B1 publication Critical patent/EP0370215B1/en
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.
  • 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 arms, also not shown, for operating the gas exchange valves are 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 is lubricated in the control bore 10 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)

Abstract

Die Erfindung betrifft eine Motorbremsvorrichtung für eine Brennkraftmaschine und umfaßt ein Drosselventil sowie einen im Zylinderkopf in einer Steuerbohrung angeordneten Steuerkolben. Um auf einfache Weise eine Schmierung des Steuerkolben zu erreichen, ist die Steuerbohrung mit einer Verbindungsöffnung zu der vom Kipphebelraum in das Kurbelgehäuse führenden Ölrücklaufbohrung versehen.The invention relates to an engine brake device for an internal combustion engine and comprises a throttle valve and a control piston arranged in a control bore in the cylinder head. In order to achieve lubrication of the control piston in a simple manner, the control bore is provided with a connection opening to the oil return bore leading from the rocker arm space into the crankcase.

Description

Die Erfindung bezieht sich auf eine Motorbremsvorrichtung für eine Brennkraftmaschine gemäß den weiteren im Oberbe­griff des Patentanspruchs 1 angegebenen Merkmalen.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.

Eine Motorbremsvorrichtung der gattungsgemäßen Bauart ist aus der DE-OS 34 28 626 bekannt. Der in der Steuerbohrung des Zylinderkopfes eingesetzte Steuerkolben wird mittels Druckluft betätigt. Infolge der hohen Öffnungs- und Schließgeschwindigkeit des Steuerkolbens treten relativ hohe Reibwiderstände zwischen Kolben-Bohrungswand auf und es besteht die Gefahr, daß der Steuerkolben in der Steu­erbohrung verklemmt.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.

Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Motorbremse derart auszubilden, daß auf bauliche einfache Weise deren Funktion und Standfestigkeit wesentlich verbessert ist.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.

Die Aufgabe ist erfindungsgemäß durch die im kennzeich­nenden Teil des Patentanspruchs 1 angegebenen Merkmale gelöst.The object is achieved by the features specified in the characterizing part of patent claim 1.

Durch die Erfindung wird auf einfache Weise ohne zusätz­lichen Fertigungsaufwand eine Schmierung der Steuerkolben erzielt, in dem ein Teil des aus dem Kipphebelraum in das Kurbelgehäuse abfließenden Schmieröles zur Steuerbohrung abgezweigt wird. Durch die Schmierung wird ferner eine Erhöhung der Standfestigkeit erzielt, da die Reibung zwi­schen Kolben und Steuerbohrung verringert und ein Fest­setzen des Kolbens in der Steuerbohrung weitgehend ver­hindert wird. Ferner wird durch die Schmierung ein zu­sätzlicher Kühleffekt am Steuerkolben erzielt, durch den der Verschleiß eines am Steuerkolben angeordneten Dicht­ringes verringert wird, was ebenfalls zu einer Verbesse­rung der Standfestigkeit beiträgt. Mit der Verbindung von Ölrücklaufbohrung und Steuerbohrung wird gleichzeitig eine Entlüftung des unter dem Steuer­kolben liegenden Raumes erreicht, so daß auf die Anbrin­gung einer besonderen Entlüftungsbohrung verzichtet werden kann.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. Furthermore, 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. With the connection of the oil return bore and the control bore, venting of the space under the control piston is achieved at the same time, so that there is no need for a special vent bore.

Weitere Ausschaltungen der Erfindung sind Gegenstand der Unteransprüche.Further exclusions of the invention are the subject of the dependent claims.

In der nachfolgenden Zeichnungsbeschreibung wird ein Aus­führungsbeispiel der Erfindung an Hand zweier Abbildungen näher erläutert. Es zeigen:

  • Figur 1 von der erfindungsgemäßen Motorbremsvor­richtung das Drosselventil mit Steuerkolben in einem Querschnitt durch den Zylinderkopf einer Brennkraftmaschine und,
  • Figur 2 die Lage der Steuerbohrung zur Führung des Steuerkolbens am Zylinderkopf aus Figur 1 in einer Draufsicht.
In the following description of the drawings, an embodiment of the invention is explained in more detail with the aid of two illustrations. Show it:
  • 1 of the engine brake device according to the invention, the throttle valve with control piston in a cross section through the cylinder head of an internal combustion engine, and
  • Figure 2 shows the position of the control bore for guiding the control piston on the cylinder head of Figure 1 in a plan view.

In Figur 1 ist von einer nach dem Dieselprinzip arbeiten­den Brennkraftmaschine ein Zylinderkopf 1 dargestellt, der die Öffnung eines Zylinders 2 verschließt. Neben den nicht dargestellten Gaswechselventilen enthält der Zylinderkopf 1 für jeden Zylinder 2 ein Drosselventil 3. Das als Tel­lerventil ausgebildete Drosselventil 3 ist mit seinem Ventilschaft 4 im Zylinderkopf 1 geführt und steuert mit seinem Ventilteller 5 eine im Zylinderkopfboden befind­liche Drosselöffnung 7. Betätigt wird das Drosselventil 3 von einem Steuerkolben 8, der mit seiner Bodenplatte 9 auf dem Ende des Ventilschaftes 4 aufliegt und in einer ab­gestuften Steuerbohrung 10 des Zylinderkopfes 1 eingesetzt ist. Der ebenfalls abgestufte Steuerkolben ist im ver­jüngten Teil der Steuerbohrung 10 mit einem Führungsab­schnitt 11 geführt und im erweiterten Teil der Steuerboh­rung mittels eines am oberen Abschnitt 12 angeordneten Dichtringes 13 dichtend gehalten. Die Verstellung des Steuerkolbens 8 erfolgt mittels Druckluft, die mit Beginn des Bremsvorganges von einem Bremsschaltventil aus ge­steuert die Oberseite des Steuerkolbens 8 beaufschlagt.1 shows a cylinder head 1 of an internal combustion engine operating on the diesel principle, which closes the opening of a cylinder 2. In addition to the gas exchange valves (not shown), 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.

Das Drosselventil 3 öffnet, so daß das vom Kolben 14 im Zylinder 2 verdichtete Gas durch die Drosselöffnung 7 in den Auslaßkanal 15 verdrängt wird.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.

Aus Figur 2 ist zu erkennen, daß die Steuerbohrung 8 neben einem Kipphebelraum 16 vorgesehen ist. Im Kipphebelraum 16 sind Aufnahmebohrungen 17 für die nicht dargestellten Gaswechselventile angeordnet. Außerdem befinden sich im Kipphebelraum 16 die ebenfalls nicht dargestellten Kipp­hebel zum Betätigen der Gaswechselventile. Die Kipphebel sind dabei auf Kipphebelachsen gelagert und werden mit Schmieröl aus dem Schmierölkreislauf geschmiert. Das aus den Lagerstellen in den Kipphebelraum 16 abtropfende Schmieröl wird durch eine Ölrücklaufbohrung 18 in das Kurbelgehäuse abgeleitet.From Figure 2 it can be seen that 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. In addition, the rocker arms, also not shown, for operating the gas exchange valves are 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.

Erfindungsgemäß ist nun vorgesehen, daß die Ölrücklauf­bohrung 18 mit einer Verbindungsöffnung 19 zur Steuerboh­rung 10 versehen ist. Hierdurch wird auf baulich einfache Weise der Steuerkolben 8 in der Steuerbohrung 10 von einem Teil des aus dem Kipphebelraum 16 in das Kurbelgehäuse abgeführten Schmierols geschmiert. Um hierbei eine ge­zielte Schmierung des Führungsabschnitts 11 am Steuerkol­ben 8 zu erreichen, ist die Verbindungsöffnung 19 in dem verjüngten Teil der Steuerbohrung 10 vorgesehen. Hierdurch wird gleichzeitig der unter dem Steuerkolben 8 liegende Raum über die Verbindungsöffnung 19 zum Kurbelgehäuse hin entlüftet.According to the invention, it is now provided that the oil return bore 18 is provided with a connection opening 19 to the control bore 10. As a result, the control piston 8 is lubricated in the control bore 10 in a structurally simple manner by part of the lubricating oil discharged from the rocker arm space 16 into the crankcase. In order to achieve targeted lubrication of the guide section 11 on the control piston 8, the connecting opening 19 is provided in the tapered part of the control bore 10. As a result, the space under the control piston 8 is simultaneously vented through the connection opening 19 to the crankcase.

Wie Figur 2 zeigt, ist die Lage der Steuerbohrung 10 so auf den Verlauf der Ölrücklaufbohrung 18 abgestimmt, daß die Ölrücklaufbohrung 18 die Steuerbohrung 8 im verjüngten Bohrungsteil anschneidet. Die hierdurch entstehende ge­meinsame Schnittlinie bildet dabei den Rand der Verbin­dungsöffnung 19. Diese Verbindung zwischen den Bohrungen 10 und 18 erfolgt auf engstem Raum und ohne einen zusätz­lichen Verbindungskanal.As FIG. 2 shows, 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.

Claims (3)

1. Motorbremsvorrichtung für eine Brennkraftmaschine mit einem im Zylinderkopf angeordneten Drosselventil zur Steuerung einer zwischen einem Zylinder und einem Auslaß­kanal liegenden Drosselöffnung und mit einem das Drossel­ventil betätigenden Steuerkolben, der in einer Steuerboh­rung im Zylinderkopf eingesetzt und während des Bremsvor­ganges mit Druckluft beaufschlagt ist und ferner mit im Zylinderkopf in einem Kipphebelraum angeordneten Kipphe­beln zum Betätigen der Gaswechselventile, wobei die Lager der Kipphebel mit Schmieröl aus dem Schmierölkreislauf der Brennkraftmaschine geschmiert werden und wobei aus den Lagern in den Kipphebelraum abtropfendes Schmieröl durch eine Ölrücklaufbohrung in das Kurbelgehäuse abgeleitet wird,
dadurch gekennzeichnet,
daß die Ölrücklaufbohrung (18) mit einer Verbindungsöff­nung (19) zur Steuerbohrung (10) versehen ist.1.Engine braking device for an internal combustion engine with a throttle valve arranged in the cylinder head for controlling a throttle opening located between a cylinder and an exhaust port and with a control piston actuating the throttle valve, which is inserted in a control bore in the cylinder head and pressurized with compressed air during the braking process and also with im Cylinder heads arranged in a rocker arm space for actuating the gas exchange valves, the bearings of the rocker arms being lubricated with lubricating oil from the lubricating oil circuit of the internal combustion engine and lubricating oil dripping from the bearings into the rocker arm space being drained off into the crankcase through an oil return hole,
characterized,
that the oil return bore (18) is provided with a connecting opening (19) to the control bore (10). 2. Motorbremsvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Steuerkolben (8) abgestuft ist und einen Dicht­(12) sowie Führungsabschnitt (11) aufweist, wobei die Verbindungsöffnung (19) in der dem Führungsabschnitt (11) benachbart liegenden Wand der Steuerbohrung (10) vorgese­hen ist.2. Engine braking device according to claim 1,
characterized,
that the control piston (8) is stepped and has a seal (12) and guide section (11), the connecting opening (19) being provided in the wall of the control bore (10) adjacent to the guide section (11). 3. Motorbremsvorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Steuerbohrung (10) und die Ölrücklaufbohrung (18) derart zueinander angeordnet sind, daß die Ölrücklaufboh­rung (18) die Steuerbohrung (10) anschneidet, wobei die gemeinsame Schnittlinie den Rand der Verbindungsöffnung (19) bildet.3. Engine braking device according to claim 1 or 2,
characterized,
that the control bore (10) and the oil return bore (18) are arranged such that the oil return bore (18) cuts the control bore (10), the common line of intersection forming the edge of the connection opening (19).
EP89118571A 1988-11-23 1989-10-06 Engine-braking system for an internal-combustion engine Expired - Lifetime EP0370215B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3839452A DE3839452A1 (en) 1988-11-23 1988-11-23 ENGINE BRAKE DEVICE FOR AN INTERNAL COMBUSTION ENGINE
DE3839452 1988-11-23

Publications (2)

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

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118571A Expired - Lifetime EP0370215B1 (en) 1988-11-23 1989-10-06 Engine-braking system for an internal-combustion engine

Country Status (3)

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

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 (en) * 1990-11-23 1992-07-27 Volvo Ab COMBUSTOR FUNCTION ENGINE
DE19839420A1 (en) * 1998-08-29 2000-03-02 Deutz Ag Engine brake device for an internal combustion engine
US6216667B1 (en) 1999-11-12 2001-04-17 Frank J. Pekar Method and device for a supercharged engine brake
AT510528B1 (en) 2010-09-23 2012-09-15 Avl List Gmbh FOUR-STROKE COMBUSTION ENGINE WITH A MOTOR BRAKE
AT510529B1 (en) 2010-09-23 2012-10-15 Avl List Gmbh FOUR-STROKE COMBUSTION ENGINE WITH A MOTOR BRAKE
AT510527B1 (en) 2010-09-23 2012-09-15 Avl List Gmbh FOUR-STROKE COMBUSTION ENGINE WITH A MOTOR BRAKE
AT518933B1 (en) 2016-07-20 2018-07-15 Avl List Gmbh INTERNAL COMBUSTION ENGINE WITH A VALVE ACTUATING DEVICE

Citations (3)

* 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
GB2058212A (en) * 1979-09-03 1981-04-08 Yanmar Diesel Engine Co Lubricant passages in internal combustion engines

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Publication number Priority date Publication date Assignee Title
DE3225478C1 (en) * 1982-07-08 1983-09-29 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Internal combustion engine, in particular for motor vehicles
DE3346371A1 (en) * 1983-12-22 1985-07-04 Audi AG, 8070 Ingolstadt Device for lubricating the stems of gas exchange valves in the cylinder head of a reciprocating internal combustion engine
DE3428626A1 (en) * 1984-08-03 1986-02-13 Daimler-Benz Ag, 7000 Stuttgart Four-stroke internal combustion engine
JPH0629530B2 (en) * 1984-11-01 1994-04-20 ヤマハ発動機株式会社 Engine lubricator
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

Patent Citations (3)

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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
GB2058212A (en) * 1979-09-03 1981-04-08 Yanmar Diesel Engine Co Lubricant passages in internal combustion engines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 215 (M-409)(1938) 3 September 1985, & JP-A-60 75727 (AKIRA SUZUKI) 30 April 1985, *

Also Published As

Publication number Publication date
DE58901086D1 (en) 1992-05-07
DE3839452C2 (en) 1991-03-07
US4930471A (en) 1990-06-05
DE3839452A1 (en) 1990-05-31
EP0370215B1 (en) 1992-04-01

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