EP0013847B1 - Durch eine Kühlmittelzirkulation gekühltes Ventilgehäuse für eine Brennkraftmaschine, insbesondere für einen Motor mit zwei Auslassventilen pro Zylinder, und Verfahren zur Montage eines derartigen Gehäuses - Google Patents

Durch eine Kühlmittelzirkulation gekühltes Ventilgehäuse für eine Brennkraftmaschine, insbesondere für einen Motor mit zwei Auslassventilen pro Zylinder, und Verfahren zur Montage eines derartigen Gehäuses Download PDF

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Publication number
EP0013847B1
EP0013847B1 EP79400970A EP79400970A EP0013847B1 EP 0013847 B1 EP0013847 B1 EP 0013847B1 EP 79400970 A EP79400970 A EP 79400970A EP 79400970 A EP79400970 A EP 79400970A EP 0013847 B1 EP0013847 B1 EP 0013847B1
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EP
European Patent Office
Prior art keywords
hand
intermediate element
valve casing
engine
chapel
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
Application number
EP79400970A
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English (en)
French (fr)
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EP0013847A1 (de
Inventor
Jean-Pierre Pollet
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.)
MAN Energy Solutions France SAS
Original Assignee
Societe dEtudes de Machines Thermiques SEMT SA
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Filing date
Publication date
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Application filed by Societe dEtudes de Machines Thermiques SEMT SA filed Critical Societe dEtudes de Machines Thermiques SEMT SA
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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
    • F01L3/12—Cooling of valves
    • F01L3/16—Cooling of valves by means of a fluid flowing through or along valve, e.g. air
    • F01L3/18—Liquid cooling of valve
    • 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
    • F01L3/12—Cooling of valves
    • F01L3/16—Cooling of valves by means of a fluid flowing through or along valve, e.g. air
    • 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
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • F01L3/085—Valve cages

Definitions

  • the present invention essentially relates to a mushroom valve chapel cooled by circulation of a coolant, for internal combustion engine.
  • the present invention relates to a mushroom valve chapel cooled by circulation of a coolant for an internal combustion engine comprising two exhaust valves per cylinder as well as a method of mounting such a chapel.
  • mushroom valve chapels cooled by circulation of a coolant, for internal combustion engine which include a cage with at least one veil or arm having a lateral orifice for communication with an inlet or outlet channel gases in or out of the cylinder on which said chapel is mounted, said veil supporting at its end an annular valve seat containing an annular chamber for said refrigerant; as well as a valve guide comprising an annular cavity for said refrigerant separated by a longitudinal partition into at least two compartments respectively of arrival and return of said refrigerant.
  • the web is pierced longitudinally with at least two conduits, respectively leading to said cavity and to said chamber.
  • one of said conduits ends in the bottom of one of the two compartments and the other conduit ends in the bottom of the other compartment, in order to ensure correct circulation of the coolant.
  • the major drawback of the valve chapels known up to now consists in that the aforementioned orientation of the lateral orifice for communication with the exhaust gas outlet channel outside the cylinder on which said chapel is mounted cannot be obtained by making two different shaped parts forming a cage, one intended to be adapted to the valve guide part of the left chapel and the other intended to be adapted to the valve guide part of the foundry the basement on the right.
  • the cost of the chapels finally obtained and therefore relatively high.
  • the present invention therefore aims to remedy the aforementioned drawback by providing a solution which allows the use of a single piece forming a cage adaptable both to the part forming the valve guide of the chapel on the left and to that of the chapel. right of an internal combustion engine with two exhaust valves per cylinder.
  • this straight solution should be of particularly simple design.
  • This solution consists, according to the invention, in a mushroom valve chapel cooled by circulation of a cooling fluid, for internal combustion engine, in particular for engine comprising two exhaust valves per cylinder, of the type previously described, characterized in that it is made of at least two complementary parts respectively upper and lower with transverse joint plane cutting said longitudinal partition, and in that it comprises an intermediate element interposed between said upper part and said lower part, said element comprising at at least two openings allowing adequate circulation of the coolant between the upper and lower parts of the same compartment and arranged so as to avoid any direct communication of coolant between the coolant inlet and return compartments for at least two positions different angles of said two parts.
  • valve chapel the same lower part can be used for the aforementioned left chapel and the right basement since it is possible to obtain the correct angular orientation of the aforementioned lateral orifice of each chapel. along the axis of the exhaust gas outlet channel out of the cylinder by simple rotation of the lower part relative to the upper part, the intermediate element making it possible to achieve the correct circulation of the coolant.
  • the intermediate element is substantially planar and advantageously consists of a washer whose two aforementioned openings are radially arranged and extend in an arc of circle less than 180 ° C.
  • the two aforementioned openings are arranged substantially symmetrically with respect to the center of symmetry of said intermediate element.
  • each aforementioned opening is radially disposed and extends in an arc of circle of between approximately 135 ° and less than 180 °, which allows a shift of the respective angular positions of the two upper and lower parts up to 45 °.
  • the valve nest is a right basement of an engine comprising two exhaust valves respectively on the left and on the right per cylinder
  • the lower part has an angular offset of approximately 22 to 25 °, preferably 23 ° 30 'relative to the normal angular position of the lower part relative to the upper part without intermediate element.
  • the lower part has an angular offset of approximately 40 to 43 °, preferably 41 ° 30 'with respect to the normal angular position of the lower part relative to the upper part, without any intermediate element.
  • the valve chapel according to the present invention has great adaptability since it is possible to vary the angular position of the lower part relative to the upper part, and therefore the angular position of the lateral orifice. communication with the exhaust gas outlet channel, between very different values ranging from 0 to 45 °.
  • valve nests can also be adapted to the case of engines comprising two intake valves per cylinder, these engines also comprising two nests on the left and on the right for each cylinder communicating with a single channel d gas admission into the cylinder, which is particularly advantageous.
  • the invention also relates to engines having at least two intake or exhaust valves per cylinder comprising two corresponding chapels of right and left respectively, with lateral orifice for communication with a single gas inlet or outlet channel in or outside said cylinder, characterized in that said plinths are constituted by nests according to the invention as defined above, the upper parts of the left and right respectively are symmetrical while the lower part of the left chapel is identical to that of the chapel on the right.
  • the lower part of the right nest has an angular offset of 22 to 25 °, preferably 23 ° 30 ′, with respect to the normal angular position of the lower part relative to the upper part, without any element.
  • the chapel on the left has an angular offset of about 40 to 43 °, preferably 41030 '.
  • the present invention relates to a method of mounting a valve cap according to the invention, characterized in that it consists in securing, for example by welding or brazing the intermediate element with one of the upper or lower parts aforementioned so that each opening is arranged on either side of the plane of the longitudinal partition of the cavity of said part and then to be joined, for example by welding or brazing, the other of said upper or lower parts with the assembly upper or lower intermediate element-part, with a predetermined angular offset of between 0 and 45 ° relative to the normal position of said parts without intermediate element.
  • a mushroom valve chapel cooled by circulation of a cooling fluid, for an internal combustion engine comprises a cage 1 and a valve guide 2.
  • a valve guide 2 To facilitate understanding of the drawing, the valve, which comes to be fitted by its rod in the chapel, has not been shown.
  • the chapel 1 comprises at least one veil 3 or arm comprising a lateral orifice 4 for communication with an inlet or outlet channel 5 (see FIG. 1) of the gases in or out of the cylinder 6 on which the basement is mounted.
  • the web 3 supports at its end an annular valve seat 7 containing an annular chamber 8 for said refrigerant.
  • the valve guide 2 has an annular cavity 9 for the refrigerant separated by a longitudinal partition 10 (see Figures 3 and 5) into at least two compartments 9a, 9b respectively of inlet (compartment 9a) and return (compartment 9b) of the refrigerant.
  • the web 3 is pierced longitudinally with at least two conduits, such as the conduits 11, 12 (FIG. 5) leading respectively to the cavity 9 and to the chamber 8.
  • One (11) of said two conduits (11, 12) ends in the bottom of one (9a) of the two compartments (9a, 9b) and the other conduit (12) ends in the bottom of the other compartment (9b).
  • this valve nest is made of at least two complementary pieces, respectively upper 14 and lower 16 with transverse joint plane 15 cutting said longitudinal partition 10 into a portion of upper partition 10a and a portion of lower partition 10b.
  • this chapel according to the invention comprises an intermediate element 17 interposed between the upper part 14 and the lower part 16.
  • This intermediate element 17 has at least two openings 19 and 20 as can be seen in Figure 3, allowing a suitable circulation of the coolant between the upper (21; 22) and lower (23; 24) parts of the same compartment (9a; 9b).
  • These openings 19, 20 are arranged so as to avoid any direct communication of coolant between the inlet compartments 9a and return 9b of the coolant for at least two different angular positions of said two parts, as can be seen in Figures 3 and 4.
  • the intermediate element is substantially planar, and advantageously consists of a washer, the two openings 19, 20 of which are radially disposed and extend in an arc of circle less than 180 ° C. as can be seen in FIGS. 3 and 4.
  • the two openings 19, 20 are arranged substantially symmetrically with respect to the center of symmetry C (FIG. 3) of the intermediate element 17.
  • each opening 19, 20 is radially arranged and extends in an arc of circle of between approximately 135 ° and 180 °, which allows an offset (a Figure 3; or ß Figure 4) of the respective angular positions of the two parts upper 14 and lower 16 between 0 and 45 °.
  • the lower part 16 advantageously has an angular offset ⁇ (see FIG. 4) of approximately 22 to 25 °, preferably 23 ° 30 ′ (as shown) relative to the normal angular position of the lower part 16 relative to the upper part 14 without intermediate element .
  • the lower part 16 advantageously has an angular offset (a, FIG. 3) from approximately 40 to 43 °, preferably 41 ° 30 ′ (as shown) relative to the normal angular position of the lower part 16 relative to the upper part 14, without intermediate element 17.
  • the valve chapels according to the invention therefore have the main application of engines having at least two intake or exhaust valves per cylinder 6 (FIG. 1) comprising two corresponding chapels respectively on the right 30 and on the left 31, with lateral orifice , such as 4, for communication with a single channel 5 for inlet or outlet (in the case shown) of gases into or out of the cylinder.
  • the chapels 30, 31 are constituted by nests according to the invention, the upper parts of the left 14 and the right respectively 14 ′ are symmetrical while the lower part 16 of the left chapel is identical to that of the chapel of right.
  • the upper part 14 'of the right chapel 30 uses the same reference numbers as those of the upper part 14 of the left chapel 31 with a prime index to differentiate them.
  • the longitudinal partition of the upper part 14 ' is indicated 10a' and corresponds to the part 10a ( Figure 3).
  • the invention therefore makes it possible to use the same lower part 16 forming a cage for the left chapel or the right chapel, which makes it possible to lower the production cost of the valve chapels by greater standardization of the foundry parts to be produced.
  • Another advantage of this construction consists in that these chapels have a great adaptability since it is possible to vary the angular position of the lower part 16 relative to the upper part 14 between wide limits between 0 and 45 °.
  • each chapel is mounted on a cylinder 6 (FIG. 1) by means such as 32, 33, 32 ', 33' allowing suitable fixing in the cylinder head of the engine.
  • the invention also relates to a method of mounting the aforementioned valve cap characterized in that it consists in securing, for example by welding or brazing, the intermediate element 17 with one (16) of the parts upper 14 or lower 16 above so that each opening 19, 20 is disposed on either side of the plane of the longitudinal wall 10 of the cavity 9 of said part (16) and then to be joined, for example by welding or brazing , the other (14) of said upper 14 and lower parts 16 with the intermediate element 17-upper or lower part assembly (in the case shown it is the lower part 16), with an angular offset (a, figure 3; [3, Figure 4) predetermined between 0 and 45 ° relative to the normal position of said upper 14 and lower 16 parts without intermediate element 17.
  • an angular offset (a, figure 3; [3, Figure 4) predetermined between 0 and 45 ° relative to the normal position of said upper 14 and lower 16 parts without intermediate element 17.
  • the angular offset ⁇ is between 22 ° and 25 °, preferably is equal to 23 ° 30 'as shown in FIG. 4.
  • this angular offset a is advantageously between 40 and 43 °, preferably is equal to 41 ° 30 'as shown in Figure 3.
  • the annular chamber 8 can be formed by the assembly of an added piece 34 on the web 3 according to a transverse joint plane 35, in order to facilitate the construction of said chapel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Details Of Valves (AREA)
  • Check Valves (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)

Claims (10)

1. Durch Umlauf eines Kühlmittels gekühltes Tellerventilgehäuse für Brennkraftmaschine, insbesondere für Maschine mit zwei Auslassventilen je Zylinder, derjenigen Art, die einen Ventilkorb mit wenigstens einem Steg bzw. Arm mit einer Seitenöffnung zur Verbindung mit einem Kanal zum Einlass bzw. Auslass der Gase in bzw. aus dem Zylinder, auf welchem das Gehäuse angeordnet ist, aufweist, wobei der Steg an seinem Ende einen eine ringförmige Kammer für das Kühlmittel enthaltenden ringförmigen Ventilsatz trägt, und mit einer Ventilführung mit einem ringförmigen Hohlraum für das Kühlmittel, welcher durch eine Längstrennwand in wenigstens zwei Zufuhr- bzw. Rückfuhrabteile für das Kühlmittel getrennt ist, wobei der Steg durch wenigstens zwei in den Hohlraum und in die Kammer mündende Bohrungen durchsetzt wird, deren eine bis zu dem Boden des einen Abteils und die andere bis zu dem Boden des anderen Abteils reicht, dadurch gekennzeichnet, dass das Ventilgehäuse (1) sich aus wenigstens zwei einander ergänzenden Teilstücken (14, 16) zusammensetzt, und zwar aus einem Oberteilstück (14) und einem Unterteilstück (16), deren Trennquerebene die Längstrennwand schneidet, und dass es einen zwischen dem Oberteilstück (14) und dem Unterteilstück (16) eingesetzten Zwischenteil (17) aufweist, der mit wenigstens zwei Öffnungen (19, 20) für eine geeignete Strömung des Kühlmittels zwischen dem oberen und unteren Teil eines selben Abteils (9) versehen ist, welche so angeordnet sind, dass sie jede unmittelbare Kühlmittelverbindung zwischen dem Kühlmittelzufuhrabteil (9a) und dem Kühlmittelrückfuhrabteil (9b) für wenigstens zwei verschiedene Winkelstellungen der beiden Teilstücke (14, 16) vermeiden.
2. Ventilgehäuse nach Anspruch 1, dadurch gekennzeichnet, dass der Zwischenteil (17) wesentlich eben its und vorteilhaft durch eine Beilagscheibe gebildet wird, deren beide Öffnungen (19, 20) in Radialrichtung angeordnet sind und sich über einen Kreisbogen kleiner als 180° erstrecken.
3. Ventilgehäuse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass beide Öffnungen (19, 20) im wesentlichen spiegelgleich in Bezug auf den Symmetriemittelpunkt (C) des Zwischenteils (17) angeordnet sind.
4. Ventilgehäuse nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass jede Öffnung (19 bzw. 20) in Radialrichtung angeordnet ist und sich über einen Kreisbogen, der zwischen 135° und weniger als 180° beträgt, erstreckt, was eine Verschiebung (a) bzw. (ß) der jeweiligen Winkelstellungen der beiden Ober- und Unterteilstücke (14, 16) bis 45° ermöglicht.
5. Ventilgehäuse nach einem der vorangehenden Ansprüche, für ein rechtes Gehäuse eines Motors, der je Zylinder zwei Auslassventile und zwar ein linkes und ein rechtes Auslassventil aufweist, dadurch gekennzeichnet, dass das untere Teilstück (16) eine Winkelverschiebung von ungefähr 22° bis 25° und vorzugsweise 23,30° zur normalen Winkelstellung des unteren Teilstücks (16) in Bezug auf das obere Teilstück (14) ohne Zwischenteil (17) aufweist.
6. Ventilgehäuse nach einem der Ansprüche 1 bis 4, für ein linkes Ventilgehäuse eines Motors der zwei Auslassventile und zwar ein linkes und ein rechtes Auslassventil je Zylinder aufweist, dadurch gekennzeichnet, dass das untere Teilstück (16) eine Winkelverschiebung von ungefähr 40° bis 43° und vorzugsweise 41,30° zur normalen Winkelstellung des unteren Teilstücks (16) in Bezug auf das obere Teilstück (14) ohne Zwischenteil (17) aufweist.
7. Motor mit wenigstens zwei Einlass- bzw. Ausslassventilen je Zylinder, wobei der Motor zwei entsprechende Ventilgehäuse und zwar ein linkes und ein rechtes Gehäuse mit einer Seitenöffnung zur Verbindung mit einem einzigen Einlass- bzw. Auslasskanal der Gase in den Zylinder bzw. aus den Zylinder aufweist, dadurch gekennzeichnet, dass die Ventilgehäuse (30, 31) durch Ventilgehäuse nach einem der vorangehenden Ansprüche gebildet werden, deren linke und rechte Oberteilstücke (14) spiegelgleich sind, während das untere Teilstück des linken Ventilgehäuses (31) mit demjenigen des rechten Ventilgehäuses (30) identisch ist.
8. Motor nach Anspruch 7, dadurch gekennzeichnet, dass das untere Teilstück (16). des rechten Ventilgehäuses (30) eine Winkelverschiebung von 22° bis 25° und vorzugsweise 23,30° zur normalen Winkelstellung des unteren Teilstücks (16) in Bezug auf das obere Teilstück (14) ohne Zwischenteil (17) aufweist, während das untere Teilstück des linken Ventilgehäuses (31) eine Winkelverschiebung von 40° bis 43° und vorzugsweise 41,30° zur normalen Winkelstellung des unteren Teilstücks (16) in Bezug auf das obere Teilstück (14) ohne Zwischenteil (17) aufweist.
9. Verfahren zum Einbau eines Ventilgehäuses nach irgendeinem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass man den Zwischenteil (17) z.B. durch Schweissen bzw. Hartlöten fest mit einem der Ober- bzw. Unterteilstücke (14, 16) verbindet, derart, dass jede Öffnung (19 bzw. 20) beiderseits der Ebene der Längstrennwand (10) des Hohlraumes (9) des Teilstückes (14 bzw. 16) liegt und dass man dann das andere Unter- bzw. Oberteilstück (16 bzw. 14) z.B. durch Schweissen oder Hartlöten fest mit der sich aus dem Zwischenteil (17) und dem oberen bzw. unteren Teilstück (14 bzw. 16) zusammensetzenden Einheit verbindet, mit einer zwischen 0° und 45° vorbestimmten Winkelverschiebung zur normalen Stellung dieser Teilstücke (14, 16) ohne Zwischenteil (17).
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass, bei einem rechten Ventilgehäuse (30) die Winkelverschiebung 22° bis 25° und vorzugsweise 23,30° beträgt, während bei einem linken Winkelgehäuse (31) die Winkelverschiebung 40° bis 43° und vorzugsweise 41,300 beträgt.
EP79400970A 1979-01-29 1979-12-05 Durch eine Kühlmittelzirkulation gekühltes Ventilgehäuse für eine Brennkraftmaschine, insbesondere für einen Motor mit zwei Auslassventilen pro Zylinder, und Verfahren zur Montage eines derartigen Gehäuses Expired EP0013847B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7902192 1979-01-29
FR7902192A FR2447459A1 (fr) 1979-01-29 1979-01-29 Chapelle de soupape en champignon refroidie par circulation d'un fluide refrigerant, pour moteur a combustion interne, notamment pour moteur comprenant deux soupapes d'echappement par cylindre et procede de montage d'une telle chapelle

Publications (2)

Publication Number Publication Date
EP0013847A1 EP0013847A1 (de) 1980-08-06
EP0013847B1 true EP0013847B1 (de) 1981-11-25

Family

ID=9221300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400970A Expired EP0013847B1 (de) 1979-01-29 1979-12-05 Durch eine Kühlmittelzirkulation gekühltes Ventilgehäuse für eine Brennkraftmaschine, insbesondere für einen Motor mit zwei Auslassventilen pro Zylinder, und Verfahren zur Montage eines derartigen Gehäuses

Country Status (17)

Country Link
US (1) US4341185A (de)
EP (1) EP0013847B1 (de)
JP (1) JPS55104548A (de)
KR (1) KR840000732B1 (de)
AU (1) AU531027B2 (de)
BR (1) BR8000065A (de)
CS (1) CS226714B2 (de)
DD (1) DD148655A5 (de)
DE (1) DE2961474D1 (de)
DK (1) DK153173C (de)
ES (1) ES487143A0 (de)
FI (1) FI65311C (de)
FR (1) FR2447459A1 (de)
NO (1) NO152025C (de)
PL (1) PL132395B1 (de)
SU (1) SU1056918A3 (de)
YU (1) YU41685B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3412052A1 (de) * 1984-03-31 1985-10-03 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Kuehlvorrichtung
US4688527A (en) * 1986-03-31 1987-08-25 Chrysler Motors Corporation Ceramic valve guide and seat
JP6441816B2 (ja) * 2014-01-10 2018-12-19 富士電機株式会社 商品払出装置
CN107004328B (zh) * 2014-12-18 2019-07-19 富士电机株式会社 商品排出装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1893209A (en) * 1932-05-11 1933-01-03 Ingersoll Rand Co Valve cage
DE1801135A1 (de) * 1968-10-04 1970-04-16 Maschf Augsburg Nuernberg Ag Zylinderdeckel fuer fluessigkeitsgekuehlte Brennkraftmaschinen
FR2259232B1 (de) * 1974-01-29 1976-06-25 Semt
DE2410893C2 (de) * 1974-03-07 1982-09-16 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Ventilkorb für Brennkraftmaschinen
JPS5223027A (en) * 1975-08-12 1977-02-21 Taiseki Kunugi Process for preparation of styrene
DE2558775A1 (de) * 1975-12-24 1977-07-07 Maschf Augsburg Nuernberg Ag Fluessigkeitsgekuehlte brennkraftmaschine
JPS5524327Y2 (de) * 1976-06-15 1980-06-11
CH614014A5 (de) * 1977-01-28 1979-10-31 Sulzer Ag
FR2399541A1 (fr) * 1977-08-05 1979-03-02 Semt Chapelle de soupape en champignon refroidie par circulation d'un fluide refrigerant, pour moteur a combustion interne
CH627820A5 (en) * 1978-03-21 1982-01-29 Sulzer Ag Valve cage with cooled valve seat for the exhaust valve of a diesel engine

Also Published As

Publication number Publication date
DD148655A5 (de) 1981-06-03
ES8101701A1 (es) 1980-12-16
NO152025B (no) 1985-04-09
AU5405179A (en) 1980-08-07
FR2447459B1 (de) 1982-07-23
FR2447459A1 (fr) 1980-08-22
PL132395B1 (en) 1985-02-28
AU531027B2 (en) 1983-08-04
NO800206L (no) 1980-07-30
CS226714B2 (en) 1984-04-16
US4341185A (en) 1982-07-27
SU1056918A3 (ru) 1983-11-23
BR8000065A (pt) 1980-09-23
JPS6339767B2 (de) 1988-08-08
ES487143A0 (es) 1980-12-16
YU304679A (en) 1983-02-28
DE2961474D1 (en) 1982-01-28
DK34080A (da) 1980-07-30
FI65311C (fi) 1984-04-10
PL220477A1 (de) 1980-09-08
NO152025C (no) 1985-07-17
YU41685B (en) 1987-12-31
KR830002143A (ko) 1983-05-23
KR840000732B1 (ko) 1984-05-24
DK153173B (da) 1988-06-20
FI800221A (fi) 1980-07-30
JPS55104548A (en) 1980-08-11
FI65311B (fi) 1983-12-30
EP0013847A1 (de) 1980-08-06
DK153173C (da) 1988-11-14

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