SE441851B - VENTILSETESRING - Google Patents
VENTILSETESRINGInfo
- Publication number
- SE441851B SE441851B SE8008896A SE8008896A SE441851B SE 441851 B SE441851 B SE 441851B SE 8008896 A SE8008896 A SE 8008896A SE 8008896 A SE8008896 A SE 8008896A SE 441851 B SE441851 B SE 441851B
- Authority
- SE
- Sweden
- Prior art keywords
- seat ring
- cylinder head
- degree
- valve seat
- cylinder
- Prior art date
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
- F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
8008896-6 eller högst lika med kvoten mellan talet 55 och den genomsnittliga temperaturgradienten mätt i K/mm vid cylin- derhuvudets förbränningsrumsida (h 3 55/grad T i mm). 8008896-6 or at most equal to the ratio between the number 55 and that average temperature gradient measured in K / mm at cylindrical the combustion chamber side of the head (h 3 55 / degree T in mm).
Lösningstanken hänger alltså samman med dämpningen av de genom ventilsätesringens böjning framkallade drag- spänningarna, genom att sätesringens höjd förminskas eller begränsas till ett värde, vid vilket dragspänningarna i materialet fortfarande kan absorberas.The idea of solution is thus connected with the attenuation of the tensile forces produced by the bending of the valve seat ring the tension, by reducing the height of the seat ring or is limited to a value at which the tensile stresses in the material can still be absorbed.
Som vidareutbildning av uppfinningen föreslås att den genomsnittliga temperaturgradienten i K/mm bestämmes av skillnaden mellan temperaturerna på förbränningsrums- sidan i cylinderhuvudet i mitten Tl och temperaturen T2 nära cylinderväggen och att av denna skillnad Tl - T2 och avståukfiza i mm mellan mätpunkterna bildas kvoten (T grad = (Tl-T2)/a i K/mm.As a further education of the invention, it is proposed that the average temperature gradient in K / mm is determined of the difference between the temperatures of the combustion chamber the side of the cylinder head in the middle T1 and the temperature T2 near the cylinder wall and that of this difference T1 - T2 and abstinence fi za in mm between the measuring points the ratio is formed (T degree = (T1-T2) / a in K / mm.
På detta sätt erhåller man det verkliga medelvärdet av temperaturgradienten, som slutligen är utslagsgivande för uppfinningsidên.In this way, the true mean value is obtained of the temperature gradient, which is ultimately decisive for the inventive idea.
Detaljer av uppfinningen framgår av den följande beskrivningen æzetti ritningarna schematisktvisâfi eXemPel- Fig. l visar en anordning av ventilsätesringarna i ett cylinderhuvud sedd från förbränningsrumssidan.Details of the invention appear from the following the description of the drawings is shown schematically in the eXemPel- Fig. 1 shows an arrangement of the valve seat rings in a cylinder head seen from the combustion chamber side.
Fig. 2 visar en sektion längs linjen II-II i fig. l.Fig. 2 shows a section along the line II-II in Fig. 1.
Fig. 3 visar en sektion längs linjen III-III i fig. l, varvid dock även den termiska deformationen av cylinderhuvudväggen är antydd.Fig. 3 shows a section along the line III-III in Fig. 1, but also the thermal deformation of the cylinder head wall is indicated.
I figurerna l till 3 betecknar l cylindern i en förbränningsmotor och 2 cylinderhuvudet, som huvudsakligen är framställt av grått gjutgods. Cylindern l har diametern D och dess mittpunkt bildas av skärningspunkten mellan tvâ axlar x, y. Inom diametern D är i cylinderhuvudet 2 fästad en mindre ventilsätesring 3 för en icke visad ut- loppsventil och en större ventilsätesring 4 för en icke hellerxüsad inloppsventil.In Figures 1 to 3, l denotes the cylinder of a internal combustion engine and 2 cylinder head, which mainly is made of gray castings. The cylinder 1 has the diameter D and its midpoint are formed by the point of intersection between two axes x, y. Within the diameter D is in the cylinder head 2 attached a smaller valve seat ring 3 for an embodiment not shown flue valve and a larger valve seat ring 4 for a non hellerxüsad inlet valve.
Såsom framgår av fig. l ligger ventilsätesringarnas 3, 4 medelpunkter på en axel w, som är parallell med men dock förskjuten åt sidan en sträcka a i förhållande 3008896-6 till axeln x. Om motorn under drift termiskt belastas på så sätt, att i den mot förbränningsrummet vettande ytan av cylinderhuvudets 2 vägg i området för ventilmellan~ rummet, dvs delen mellan de båda ventilsätesringarna 3, 4, uppträder temperatur av 4000 C och mera, så nedböjes cylinderhuvudets 2 vägg såsom visas i fig. 3 särskilt i riktning mot axeln z mot förbränningsrummet så långt, attdetnåste uppstå en sprickbildning i området 5 av ventilsätesringen 3 för utloppsventilen. För att detta skall undvikas, mäter man på den mot förbränningsrummet vettande ytan av cylinderhuvudets 2 vägg dels i punkten 6, alltså i mitten temperaturen Tl dels i punkten 7 nära cylinderns l vägg temperaturen T2, subtraherar T2 från Tl och delar värdet med det i mm mätta avståndet a mellan de båda punkterna 6 och 7. På detta sätt erhåller man medelvärdet av temperaturgradienten grad T i K/mm.As can be seen from Fig. 1, the valve seat rings are located 3, 4 midpoints on an axis w, which is parallel to men however, shifted to the side a distance a in relation 3008896-6 to the shaft x. If the engine is thermally loaded during operation so that in the surface facing the combustion chamber of the wall of the cylinder head 2 in the area of the valve between ~ the space, ie the part between the two valve seat rings 3, 4, a temperature of 4000 C and more occurs, then deflected the wall of the cylinder head 2 as shown in Fig. 3 in particular in the direction of the axis z towards the combustion chamber so far, that cracks should occur in the area 5 of valve seat ring 3 for the outlet valve. To this should be avoided, measure it against the combustion chamber facing the surface of the wall of the cylinder head 2 partly at point 6, thus in the middle the temperature Tl partly in the point 7 near cylinder wall temperature T2, T2 subtracts from Tl and divide the value by the distance a measured in mm between the two points 6 and 7. In this way one obtains the mean value of the temperature gradient grade T in K / mm.
Om en sprickbildning även skall undvikas i ventil- sätesringarna 3, 4, så måste dessas höjd h i mm vara mindre än eller högst lika med 55/grad T.If cracking is also to be avoided in the valve seat rings 3, 4, then their height h in mm must be smaller than or not equal to 55 / degree T.
Slutligen kan påpekas att avståndet a även kan bestämmas genom att man från den halva cylinderdiametern D/2 subtraherar avståndet e (a = D/2 - e i mm).Finally, it can be pointed out that the distance a can also determined by starting from half the cylinder diameter D / 2 subtracts the distance e (a = D / 2 - e in mm).
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792950964 DE2950964A1 (en) | 1979-12-18 | 1979-12-18 | VALVE SEAT RING FOR INTERNAL COMBUSTION ENGINES |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8008896L SE8008896L (en) | 1981-06-19 |
SE441851B true SE441851B (en) | 1985-11-11 |
Family
ID=6088836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8008896A SE441851B (en) | 1979-12-18 | 1980-12-17 | VENTILSETESRING |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5698514A (en) |
CH (1) | CH652800A5 (en) |
DD (1) | DD155539A1 (en) |
DE (1) | DE2950964A1 (en) |
FR (1) | FR2488652B1 (en) |
GB (1) | GB2065770B (en) |
HU (1) | HU183271B (en) |
IN (1) | IN153951B (en) |
IT (1) | IT1134690B (en) |
SE (1) | SE441851B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3331145C2 (en) * | 1983-08-30 | 1986-08-28 | Audi AG, 8070 Ingolstadt | Light alloy cylinder head for reciprocating internal combustion engines |
US8220429B2 (en) * | 2009-07-23 | 2012-07-17 | Briggs & Stratton Corporation | Overhead valve and rocker arm configuration for a small engine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1170761A (en) * | 1957-01-02 | 1959-01-19 | Thompson Prod Inc | Seat insert for valve |
GB1164292A (en) * | 1966-06-23 | 1969-09-17 | Davey Paxman And Company Ltd | Improvements in and relating to Cylinder Heads and Valve Seat Inserts for Internal Combustion Engines. |
-
1979
- 1979-12-18 DE DE19792950964 patent/DE2950964A1/en not_active Withdrawn
-
1980
- 1980-11-15 CH CH8466/80A patent/CH652800A5/en not_active IP Right Cessation
- 1980-12-03 FR FR8025633A patent/FR2488652B1/fr not_active Expired
- 1980-12-10 IN IN1363/CAL/80A patent/IN153951B/en unknown
- 1980-12-12 IT IT26590/80A patent/IT1134690B/en active
- 1980-12-17 SE SE8008896A patent/SE441851B/en unknown
- 1980-12-17 GB GB8040333A patent/GB2065770B/en not_active Expired
- 1980-12-17 JP JP17729680A patent/JPS5698514A/en active Pending
- 1980-12-18 DD DD80226269A patent/DD155539A1/en unknown
- 1980-12-18 HU HU803046A patent/HU183271B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FR2488652B1 (en) | 1984-07-27 |
DE2950964A1 (en) | 1981-06-25 |
IT8026590A0 (en) | 1980-12-12 |
FR2488652A1 (en) | 1982-02-19 |
JPS5698514A (en) | 1981-08-08 |
GB2065770A (en) | 1981-07-01 |
DD155539A1 (en) | 1982-06-16 |
IN153951B (en) | 1984-09-01 |
HU183271B (en) | 1984-04-28 |
SE8008896L (en) | 1981-06-19 |
GB2065770B (en) | 1983-08-24 |
CH652800A5 (en) | 1985-11-29 |
IT1134690B (en) | 1986-08-13 |
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