DE3302650A1 - COMBUSTION ENGINE VALVE - Google Patents

COMBUSTION ENGINE VALVE

Info

Publication number
DE3302650A1
DE3302650A1 DE19833302650 DE3302650A DE3302650A1 DE 3302650 A1 DE3302650 A1 DE 3302650A1 DE 19833302650 DE19833302650 DE 19833302650 DE 3302650 A DE3302650 A DE 3302650A DE 3302650 A1 DE3302650 A1 DE 3302650A1
Authority
DE
Germany
Prior art keywords
valve
valve according
shaft
rod
tube
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.)
Withdrawn
Application number
DE19833302650
Other languages
German (de)
Inventor
Oliver Dipl.-Phys. 7148 Remseck Laing
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19833302650 priority Critical patent/DE3302650A1/en
Priority to GB08401869A priority patent/GB2137279B/en
Priority to JP1112484A priority patent/JPS59183011A/en
Priority to FR8401429A priority patent/FR2540176B1/en
Publication of DE3302650A1 publication Critical patent/DE3302650A1/en
Withdrawn legal-status Critical Current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
    • 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
    • F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)
  • Powder Metallurgy (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Description

Ventil für VerbrennungsmotorInternal combustion engine valve

Die Erfindung bezieht sich auf Ventile, insbesondere Auslassventile für Verbrennungsmotoren. In der Praxis sind bisher ausschliesslich Ventile aus chromnickel- oder wolframhaltigen Legierungen bekannt geworden. Bei der Verwendung von bleihaltigen Zusätzen zum Treibstoff bilden sich auf der metallischen Oberfläche Schichten, die den Ansatz von Verbrennungsprodukten verhindern. Bleifreie Treibstoffe führen zu erhöhten Ablagerungen, die zu örtlichen Oberhitzungen durch Flammen, die durch Spalte in den Ablagerungen dringen, führen. Ein weiterer Nachteil metallischer Ventile liegt im hohen Ventilgewicht. Proportional zum Ventilgewicht steigen die Öffnungskräfte und dementsprechend die zum Ventilantrieb der Kurbelwelle entzogene Leistung, ferner das Gewicht des Ventilantriebes.The invention relates to valves, in particular exhaust valves for internal combustion engines. In practice, so far only valves made of chrome-nickel or Alloys containing tungsten have become known. Form when using lead additives to fuel there are layers on the metallic surface that prevent the build-up of combustion products. Lead-free Fuels lead to increased deposits, which lead to local overheating from flames that spread through crevices penetrate the deposits, lead. Another disadvantage of metallic valves is the high valve weight. The opening forces increase proportionally to the valve weight and accordingly those to the valve drive Power drawn from the crankshaft, as well as the weight of the valve drive.

Die Erfindung verhindert diesen Nachteil. Gemäss der Erfindung besteht der Ventilteller aus einem hochoxidationsbeständigen Werkstoff, dessen Oberfläche nur geringe Affinität zu graphithaltigen Verbrennungsprodukten aufweist, Als besonders geeignet haben sich Siliciumcarbid und Siliciumnitrid erwiesen. Diese beiden Werkstoff sind durch geringes spezifisches Gewicht, extreme Oxidationsbeständigkeit und sehr hohe Härte gekennzeichnet. Die hohe Härte bringt andererseits den Nachteil mit sich, dass der Werkstoff eine wesentlich höhere Sprödigkeit aufweist, als die bisherigen Metall-Legierungen. Als besonders kritisch haben sich die Kräfte erwiesen, die sich auf exzentrischen Versatz zwischen der Axialführung und dem Ventilsitz ergeben. Als verbesserte Ausführungsform sieht die Erfindung eine Variante vor, bei der das Ventil nicht aus einem Stück, sondern aus einem Hartstoffteller und einem metallischen Schaft besteht. Dieser Schaft wird erfindungsgemäss so ausgebildet, dass im Rahmen der Fabrikationstoleranzen,The invention avoids this disadvantage. According to the invention the valve disc is made of a highly oxidation-resistant material with only a small surface Has affinity for combustion products containing graphite, Silicon carbide and Silicon nitride proved. These two materials are characterized by their low specific weight and extreme resistance to oxidation and very high hardness. On the other hand, the high hardness has the disadvantage that the material has a significantly higher brittleness than the previous metal alloys. Have to be particularly critical the forces that result from eccentric misalignment between the axial guide and the valve seat have been found. As an improved embodiment, the invention provides a variant in which the valve is not made of one piece, but consists of a hard material plate and a metallic shaft. According to the invention, this shaft is so trained that within the scope of the manufacturing tolerances,

die sich als Exzentrizität zwischen der Ventilsitzachse und der iSchaftachse ergeben, eine radiale Verschiebung zwischen dem Hartstoff-Teller und dem Schaft möglich ist.which result as the eccentricity between the valve seat axis and the shaft axis, a radial displacement between the hard material plate and the shaft is possible.

Die letztgenannte Ausführungsform soll anhand einer Figur beschrieben werden.The last-mentioned embodiment should be based on a figure to be discribed.

Der Teller 1 ragt zur Kompensation der geringeren mechanischen Belastbarkeit der Hartstoffe etwas tiefer in das Zylinderinnere hinein, was gegebenenfalls geringfügige Aussparungen am Kolbenboden erforderlich macht. Der Schaft besteht aus einem Rohr 2, welches stumpf auf dem Ringbereich 3 des Tellers 1 aufliegt und welches im oberen Bereich eine Verengung 4 aufweist. In diesem Rohr befindet sich ein zylindrischer Stab 5, der mit dem Bereich 4 über einen Press-Sitz verbunden ist. Die radialen Spalte 6 und 7 erlauben eine geringfügige radiale Verschiebung des Tellers 1 relativ zum Rohr 2 des Schaftes. Im oberen Bereich ist ein Amboss 8 aus Siliciumcarbid eingepresst, der die Öffnungskräfte auf den Schaft überträgt.The plate 1 protrudes a little deeper to compensate for the lower mechanical load capacity of the hard materials into the inside of the cylinder, which may require small recesses in the piston crown. The shaft consists of a tube 2, which rests butt on the ring area 3 of the plate 1 and which has a constriction 4 in the upper area. In this tube there is a cylindrical rod 5 with the area 4 is connected via a press fit. The radial gaps 6 and 7 allow a slight radial displacement of the plate 1 relative to the tube 2 of the shaft. In the upper area an anvil 8 is off Pressed in silicon carbide, which transfers the opening forces to the shaft.

- Leerseite -- blank page -

Claims (8)

PatentansprücheClaims 1J Ventil für Verbrennungsmotor, dadurch gekennzeichnet, dass zumindest der Ventilteller 1 aus Siliciumcarbid oder Siliciumnitrid hergestellt ist.1J valve for internal combustion engine, characterized in that at least the valve disk 1 is made of silicon carbide or silicon nitride. 2. Ventil nach Anspruch 1, dadurch gekennzeichnet, dass der Schaft aus Metall besteht.2. Valve according to claim 1, characterized in that the shaft consists of metal. 3. Ventil nach Anspruch 1, dadurch gekennzeichnet, dass der Schaft aus einem Rohr (2) und einem Stab (5) mit einem Kopf (9) besteht.3. Valve according to claim 1, characterized in that the shaft consists of a tube (2) and a rod (5) with a head (9). 4. Ventil nach Anspruch 3, dadurch gekennzeichnet, dass das Rohr (2) auf einer planen Ringfläche (3) des
Tellers (1) aufsitzt.4. Valve according to claim 3, characterized in that the tube (2) on a flat annular surface (3) of the
Plate (1) is seated. 5. Ventil nach Anspruch 4, dadurch gekennzeichnet, dass der Stab (5) mit der Bohrung des Tellers CO einen Spalt (6) und der Kopf (9) mit der Bohrung einen
Spalt (7) bildet.5. Valve according to claim 4, characterized in that the rod (5) with the bore of the plate CO a gap (6) and the head (9) with the bore a
Gap (7) forms. 6. Ventil nach Anspruch 2, dadurch gekennzeichnet, dass6. Valve according to claim 2, characterized in that der Stab (5) und das Rohr (2) am ventiltellerabgewandten Ende miteinander verbunden sind.the rod (5) and the tube (2) on the valve disk facing away End connected. 7. Ventil nach Anspruch 1, dadurch gekennzeichnet, dass auch die ventiltellerabgewandte Seite des Schaftes
aus Hartstoff (8) besteht.7. Valve according to claim 1, characterized in that also the side of the shaft facing away from the valve disk
consists of hard material (8). 8. Ventil nach Anspruch 3, dadurch gekennzeichnet, dass für den Schaft (2) und den Stab (5) jeweils ein Werkstoff mit solchem Wärmedehnungskoeffizienten gewählt wird, dass sich der Abstand zwischen der Ringfläche (3) und dem Kopf (9) im Betriebstemperaturintervall nicht ändert.8. Valve according to claim 3, characterized in that a material with such a coefficient of thermal expansion is selected for the shaft (2) and the rod (5) that the distance between the annular surface (3) and the head (9) is in the operating temperature interval does not change.
DE19833302650 1983-01-27 1983-01-27 COMBUSTION ENGINE VALVE Withdrawn DE3302650A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19833302650 DE3302650A1 (en) 1983-01-27 1983-01-27 COMBUSTION ENGINE VALVE
GB08401869A GB2137279B (en) 1983-01-27 1984-01-25 Valve for an internal combustion engine
JP1112484A JPS59183011A (en) 1983-01-27 1984-01-26 Valve for internal combustion engine
FR8401429A FR2540176B1 (en) 1983-01-27 1984-01-27 VALVE FOR INTERNAL COMBUSTION ENGINES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833302650 DE3302650A1 (en) 1983-01-27 1983-01-27 COMBUSTION ENGINE VALVE

Publications (1)

Publication Number Publication Date
DE3302650A1 true DE3302650A1 (en) 1984-08-02

Family

ID=6189327

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833302650 Withdrawn DE3302650A1 (en) 1983-01-27 1983-01-27 COMBUSTION ENGINE VALVE

Country Status (4)

Country Link
JP (1) JPS59183011A (en)
DE (1) DE3302650A1 (en)
FR (1) FR2540176B1 (en)
GB (1) GB2137279B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19602720A1 (en) * 1996-01-26 1997-07-31 Audi Ag Lift valve as gas inlet and exhaust valve of internal combustion engine
DE19705412A1 (en) * 1997-02-13 1998-08-20 Audi Ag Method and device for testing a component made of brittle material
WO1998036159A1 (en) 1997-02-14 1998-08-20 Lsp Innovative Automotive Systems Gmbh Gas shuttle valve, and method for measuring the pressure in the combustion chamber of an internal combustion chamber

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62184266U (en) * 1986-05-15 1987-11-24
DE19731382A1 (en) * 1997-07-22 1999-01-28 Heinz Leiber Gas exchange valve and method for measuring the pressure in a combustion chamber of an internal combustion engine
DE10354077B4 (en) 2003-11-19 2005-10-20 Daimler Chrysler Ag lightweight valve
DE10354085B4 (en) 2003-11-19 2005-11-24 Daimlerchrysler Ag lightweight valve
DE10354086B4 (en) 2003-11-19 2005-11-24 Daimlerchrysler Ag lightweight valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE642218C (en) * 1934-03-08 1937-02-25 Marc Birkigt Socket pipe for the production of valves for internal combustion engines that are hollow in the plate and in the shaft
US2882886A (en) * 1956-08-16 1959-04-21 Gen Motors Corp Hollow stem poppet valve
DE3122603A1 (en) * 1981-06-06 1983-01-05 MTU Motoren- und Turbinen-Union München GmbH, 8000 München "VALVE, IN PARTICULAR INLET OR EXHAUST VALVE ON A COMBUSTION ENGINE"

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1444210A (en) * 1922-09-20 1923-02-06 George R Rich Poppet valve for internal-combustion engines
US1875758A (en) * 1930-04-19 1932-09-06 James J Parker Tappet valve
GB665330A (en) * 1949-08-16 1952-01-23 Alliance Europ Improvements in or relating to the combustion chambers and pistons of internal combustion engines
CH275913A (en) * 1949-09-07 1951-06-15 Sulzer Ag Valve with break protection.
BE588969A (en) * 1959-03-26
FR2329848A1 (en) * 1975-10-30 1977-05-27 Semt COOLED MUSHROOM TYPE VALVE BY CIRCULATION OF A REFRIGERANT FLUID
JPS5623507A (en) * 1979-08-02 1981-03-05 Toshiba Corp Exhaust valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE642218C (en) * 1934-03-08 1937-02-25 Marc Birkigt Socket pipe for the production of valves for internal combustion engines that are hollow in the plate and in the shaft
US2882886A (en) * 1956-08-16 1959-04-21 Gen Motors Corp Hollow stem poppet valve
DE3122603A1 (en) * 1981-06-06 1983-01-05 MTU Motoren- und Turbinen-Union München GmbH, 8000 München "VALVE, IN PARTICULAR INLET OR EXHAUST VALVE ON A COMBUSTION ENGINE"

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19602720A1 (en) * 1996-01-26 1997-07-31 Audi Ag Lift valve as gas inlet and exhaust valve of internal combustion engine
DE19602720B4 (en) * 1996-01-26 2008-03-27 Audi Ag globe valve
DE19705412A1 (en) * 1997-02-13 1998-08-20 Audi Ag Method and device for testing a component made of brittle material
DE19705412C2 (en) * 1997-02-13 2000-02-24 Audi Ag Method and device for testing a component made of brittle material
WO1998036159A1 (en) 1997-02-14 1998-08-20 Lsp Innovative Automotive Systems Gmbh Gas shuttle valve, and method for measuring the pressure in the combustion chamber of an internal combustion chamber

Also Published As

Publication number Publication date
GB2137279A (en) 1984-10-03
FR2540176A1 (en) 1984-08-03
FR2540176B1 (en) 1988-10-14
GB8401869D0 (en) 1984-02-29
GB2137279B (en) 1986-11-26
JPS59183011A (en) 1984-10-18

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Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee
8110 Request for examination paragraph 44
8170 Reinstatement of the former position
8139 Disposal/non-payment of the annual fee