EP0024890A1 - Soupape d'échappement pour un moteur à combustion interne - Google Patents
Soupape d'échappement pour un moteur à combustion interne Download PDFInfo
- Publication number
- EP0024890A1 EP0024890A1 EP80302900A EP80302900A EP0024890A1 EP 0024890 A1 EP0024890 A1 EP 0024890A1 EP 80302900 A EP80302900 A EP 80302900A EP 80302900 A EP80302900 A EP 80302900A EP 0024890 A1 EP0024890 A1 EP 0024890A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- annular chamber
- valve part
- chamber
- combustion chamber
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 32
- 230000007704 transition Effects 0.000 claims description 4
- 239000000567 combustion gas Substances 0.000 abstract description 12
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 230000004888 barrier function Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 239000000470 constituent Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910001347 Stellite Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 150000003682 vanadium compounds Chemical class 0.000 description 1
Images
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
- 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
-
- 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
- F01L3/04—Coated valve members or 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
- 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
- F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
Definitions
- the present invention relates to an exhaust valve for an internal combustion engine, comprising a stationary valve part and an axially movable valve part, cooperating seating surfaces on said valve parts and an annular chamber formed in at least one of said valve parts and communicating with the combustion chamber of the engine cylinder when the valve is closed.
- An object of the invention is to obtain a prolonged lifetime of the valve by reducing the rate at which the seating surfaces of the valve gradually deteriorate due to corrosive and erosive attacks by aggressive constituents present in the exhaust gases, in particular sodium and vanadium compounds occurring when the engine is running on heavy fuel oil.
- US Patent Specification No. 1 873 119 discloses a valve of the kind referred to above in which an annular chamber in the stationary valve part and a chamber centrally located within the movable valve part both communicate with the combustion chamber through bores opening adjacent the edges of the seating surfaces oriented towards the combustion chamber.
- said two chambers within the valve parts communicate with a source of pressurized air and when the exhaust valve opens, the outflowing exhaust gases entrain, by ejector action, the relatively cool air from the chambers, which air thus effects a certain cooling of the seating surfaces during the exhaust period.
- An exhaust valve according to the present invention differs from the valve known from US Patent Specification No. 1--873 119 by the feature that the annular chamber is formed as a recess in a surface of one or both valve parts, which recess is open towards the opposed surface of the other valve part along its entire circumference.
- annular chamber With this construction and location of the annular chamber it constitutes a reservoir in the flow path from the combustion chamber to the seating surfaces of the valve parts, and when during the compression stroke the annular chamber has been filled by pure and relatively cool air, either from the engine cylinder or from a connected external source of pressurized air, that amount of air will after ignition of the fuel and until the exhaust valve opens function as a barrier between the hot combustion gases and the seating surfaces.
- the combustion gases cannot, as in the previously known valves, flow directly out through leaks formed by local gaps between the seating surfaces. Instead it will be only the reservoir air or, at most, a mixture of that air with a relatively small percentage of combustion gases which penetrates through the leaks.
- the invention is based on the recognition that the above mentioned attacks,by the aggressive constituents present in the combustion gases, on the seating surfaces occur predominantly during the period in which the valve is closed without, however, providing a perfect seal due to said local leaks which occur sooner or later, e.g. because deposits previously formed on the seating surfaces by corrosion peel off or because particles of slag, cinder or coke squeezed between the surfaces when the valve closes, have left small indentations in the surfaces.
- Measurements of the surface temperature of the stationary valve part have shown that around such a local leak there can occur a temperature rise of approximately 200°C immediately after top dead centre and an increase of the mean temperature amounting to approximately 100°C.
- the corrosion rate can double at a temperature rise of approximately 70°C, it will be understood that the invention materially extends the time which a small local leak needs to grow into a regular burn-through of such size that it becomes necessary to refurbish the seating surfaces by regrinding them. The result is therefore, as mentioned above, that the lifetime of the valve is prolonged.
- the critical period of each working cycle during which the temperature and the pressure in the combustion chamber are at so high values that combustion gases leaking out therefrom can cause perceptible attacks on the seating surfaces, is rather short and ends approximately 20° after top dead centre, both with two stroke and four stroke engines.
- the desired effect of the invention can, therefore, be obtained with an annular chamber of relatively small volume which does not necessitate any inconvenient increase of the dimensions of the valve parts or of the so-called dead space of the engine cylinder.
- the chamber volume can be chosen somewhat larger than the volume of gas which during said period can flow through a gap having a cross-section of about 0.2 by 3 mm, e.g. 2 to 3 times that gas volume.
- the annular chamber In order to obtain the desired barrier action of the air within the annular chamber combined with a minimum mixing of that air with combustion gases flowing into the chamber from the combustion chamber it is advantageous to shape the annular chamber such that the width of an axial cross-section therethrough has a maximum value at the surface of the valve part in which the recess is formed.
- the opposed surface of the other valve part With this feature the gases flowing from the combustion chamber are slowed down and deflected by the step between said surface portions whereby the gases loose a material part of their kinetic energy. Consequently, the pure and relatively cool air from the annular chamber is pushed through the local leaks, if any, between the seating surfaces by the combustion gases solely due to the static pressure drop from the combustion chamber to the downstream side of the valve.
- a further advantage of the embodiment is that at the moment when the opening of the valve starts, the flow of combustion gases from the cylinder is similarly deflected into the annular chamber, thus contributing to keep the walls of that chamber free of undesired accumulation of deposits during operation of the engine.
- the annular chamber is formed in the stationary valve part and defined by a cylindrical or substantially cylindrical first surface coaxial with the movable valve part and a second surface extending perpendicular or substantially perpendicular to the first surface.
- the manufacture of the valve is simplified and there is less risk of high local temperatures of the material surrounding the annular chamber.
- a coolaht duct as known per se, in the stationary valve part it is possible to further reduce the wall temperatures of the annular chamber and thus obtain a correspondingly lower temperature of the gas accumulated within the annular chamber thereby increasing the advantageous influence of that chamber on the lifetime of the seating surfaces.
- the surface of the movable valve part, which faces the annular chamber, may be substantially conical with a rounded outer edge which, together with said first surface of the stationary valve part, defines, in the closed position of the valve, an annular gap, the cross-section of which, as seen from the combustion chamber towards the annular chamber, is first convergent and then divergent.
- an exhaust valve for a two-stroke diesel engine comprises a stationary valve part (or bottom piece) 1 which together with a valve housing 2 is releasably secured (in a manner not shown in detail) to the cylinder cover 3 of an engine cylinder.
- the movable part 4 of the exhaust valve is generally formed as a conventional poppet valve which contacts bottom piece 1 on a conical surface.
- the seating surfaces proper of the two valve parts which are designated by 5 and 6, respectively, are formed on two coatings or inserts 7 and 8 of a suitable material, such as stellite or hard metal, see Fig. 2.
- annular chamber 9 located between the combustion chamber 10 of the engine cylinder and the seating surface 6 of valve part 4.
- the axial cross-section of chamber 9, i.e. a section located in a plane through the valve axis, is trapezoid with two substantially parallel sides 11 and 12 extending by and large perpendicular to the seating surface 6 and the opposed surface 13 of valve part 1.
- a circumferential fillet 14 located somewhat inwardly of the radially outer surface of chamber 9, the generatrix of which is the side 12, surface 13 merges, towards combustion chamber 10, into a surface 15 which is retracted so far from valve part 4 that with closed valve, as shown in Fig. 2, there is formed at this place a circumferential gap of relatively narrow gap width, so as about 0.2 mm.
- the configuration, as shown and described, of the step or transition between the two surface portions 13 and 15 as a fillet 14, the concavity of which is oriented towards the inflow gap from combustion chamber 10, contributes to limiting undesired mixing of the pure and relatively cool air within annular chamber 9 and the inflowing hot combustion gases.
- the stationary valve part or bottom piece is designated by 21, the valve housing by 22 and the cylinder cover by 23.
- the movable valve part here designated by 24, is designed as a poppet valve having a conical contact surface against bottom piece 21.
- the seating surfaces 25 and 26 between the two valve parts are formed on inserts 27 and 28 in the respective valve parts.
- annular chamber 29 which is characteristic of the invention, is formed solely in the stationary part of the valve and defined between a cylindrical surface 30 of the cylinder cover 23, a flat annular end face 31 of bottom piece 21 and a conical surface 32 of poppet valve 24.
- annular chamber 29 communicates with the combustion chamber 33 of the engine cylinder through a narrow annular gap 34 defined between the surface of cylinder cover 23 and the rounded transition between the above mentioned surface 32 of poppet valve 24 and the surface 35 of the poppet valve which is oriented towards the combustion chamber 33.
- an internal coolant duct 36 is provided in the bottom piece, as known per se.
- annular chamber 29 The function of annular chamber 29 is generally the same as described above in connection with the description of annular chamber 9, and the radial width of gap 34 can be made approximately the same as the width of the corresponding inflow gap leading to annular chamber 9.
- annular chamber is formed solely in the movable or the stationary valve part, it will be understood that alternatively it could be composed of two opposed recesses, one provided in each valve part.
- an external source of pressurized air which through a non-return valve supplies cool air at a suitable pressure to the annular chamber.
- Said pressure should not be lower than the compression pressure within the engine cylinder, and it may be of substantially the same magnitude as the maximum pressure occurring in the cylinder. Since the necessary consumption of air is relatively small, the air can be supplied by a correspondingly relatively small compressor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Lift Valve (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK3612/79 | 1979-08-29 | ||
DK361279A DK144217C (da) | 1979-08-29 | 1979-08-29 | Udstoedsventil til en forbraendingsmotor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0024890A1 true EP0024890A1 (fr) | 1981-03-11 |
EP0024890B1 EP0024890B1 (fr) | 1984-03-14 |
Family
ID=8124866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80302900A Expired EP0024890B1 (fr) | 1979-08-29 | 1980-08-21 | Soupape d'échappement pour un moteur à combustion interne |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0024890B1 (fr) |
JP (1) | JPS5634915A (fr) |
BR (1) | BR8005413A (fr) |
DE (1) | DE3066986D1 (fr) |
DK (1) | DK144217C (fr) |
ES (1) | ES494569A0 (fr) |
FI (1) | FI67252C (fr) |
IE (1) | IE50116B1 (fr) |
NO (1) | NO154807C (fr) |
PL (1) | PL124723B1 (fr) |
YU (1) | YU41940B (fr) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4301632A1 (de) * | 1993-01-22 | 1994-07-28 | Audi Ag | Ventilsitzring |
DE19754138A1 (de) * | 1997-12-05 | 1999-06-10 | Bayerische Motoren Werke Ag | Hubventil einer Brennkraftmaschine, insbesondere Einlaß-Hubventil |
WO2002006640A1 (fr) * | 2000-07-18 | 2002-01-24 | Man B & W Diesel A/S | Dispositif de soupape de commutation des gaz et conception de siege de soupape avec rainure annulaire |
EP2287450A1 (fr) * | 2009-08-07 | 2011-02-23 | Yamaha Hatsudoki Kabushiki Kaisha | Soupape d'admission, moteur à combustion interne et appareil de transport l'incorporant |
NO20140690A1 (no) * | 2014-06-03 | 2015-12-04 | Bergen Engines As | Innløpsventil for en motor |
WO2020185337A1 (fr) * | 2019-03-13 | 2020-09-17 | Caterpillar Inc. | Insert de siège de soupape pour tête de moteur dotée de couronnes d'écoulement venturi et d'une surface de siège profilée pour limiter le renfoncement de soupape |
EP3450707B1 (fr) | 2017-08-30 | 2020-09-30 | MAN Truck & Bus SE | Soupape de moteur à combustion interne |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6024802U (ja) * | 1983-07-27 | 1985-02-20 | 日野自動車株式会社 | 直噴式デイ−ゼル機関の吸気弁 |
DE3331145C2 (de) * | 1983-08-30 | 1986-08-28 | Audi AG, 8070 Ingolstadt | Leichtmetall-Zylinderkopf für Hubkolben-Brennkraftmaschinen |
DE3425690A1 (de) * | 1984-07-12 | 1986-01-23 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Ventilkoerper fuer eine brennkraftmaschine |
JPH0578905U (ja) * | 1992-03-31 | 1993-10-26 | 愛知機械工業株式会社 | 内燃機関のバルブ |
CN105041398A (zh) * | 2015-06-29 | 2015-11-11 | 唐萍 | 发动机气门顶杆 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB108436A (en) * | 1917-03-24 | 1917-08-09 | James Mckechnie | Improvements in or relating to the Air or Scavenging Valves of Internal Combustion Engines. |
US1560235A (en) * | 1925-01-05 | 1925-11-03 | Hinsch Albert Otto | Valve |
US1873119A (en) * | 1927-07-20 | 1932-08-23 | Doherty Res Co | Air cooled valve and valve seat |
GB532571A (en) * | 1939-09-08 | 1941-01-27 | Herbert Frank Percy Purday | Improvements relating to the inlet valves of internal combustion engines |
DE744250C (de) * | 1939-08-02 | 1944-11-17 | Daimler Benz Ag | Einrichtung zur Vermeidung von Beschaedigungen der Auslassventile durch Auspuffgase in Hochleistungsbrennkraftmaschinen |
FR1481241A (fr) * | 1966-04-07 | 1967-05-19 | Semt | Procédé et dispositif de refroidissement forcé d'une soupape de machine thermique ou analogue et leurs diverses applications |
GB1215972A (en) * | 1967-05-25 | 1970-12-16 | Semt | Improvements in or relating to poppet valves |
US3820522A (en) * | 1970-01-23 | 1974-06-28 | Daimler Benz Ag | Valve seat for the inlet valve in the cylinder head of a four cycle internal combustion engine |
US4106466A (en) * | 1976-08-16 | 1978-08-15 | Caterpillar Tractor Co. | Engine valve with recessed seat and annular groove |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53104021A (en) * | 1977-02-24 | 1978-09-09 | Mitsubishi Heavy Ind Ltd | Exhaust valve device in internal combustion engine |
-
1979
- 1979-08-29 DK DK361279A patent/DK144217C/da not_active IP Right Cessation
-
1980
- 1980-08-21 EP EP80302900A patent/EP0024890B1/fr not_active Expired
- 1980-08-21 DE DE8080302900T patent/DE3066986D1/de not_active Expired
- 1980-08-22 JP JP11487380A patent/JPS5634915A/ja active Granted
- 1980-08-26 YU YU2130/80A patent/YU41940B/xx unknown
- 1980-08-27 BR BR8005413A patent/BR8005413A/pt not_active IP Right Cessation
- 1980-08-27 NO NO802533A patent/NO154807C/no unknown
- 1980-08-28 ES ES494569A patent/ES494569A0/es active Granted
- 1980-08-28 IE IE1810/80A patent/IE50116B1/en not_active IP Right Cessation
- 1980-08-28 FI FI802721A patent/FI67252C/fi not_active IP Right Cessation
- 1980-08-29 PL PL1980226485A patent/PL124723B1/pl unknown
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB108436A (en) * | 1917-03-24 | 1917-08-09 | James Mckechnie | Improvements in or relating to the Air or Scavenging Valves of Internal Combustion Engines. |
US1560235A (en) * | 1925-01-05 | 1925-11-03 | Hinsch Albert Otto | Valve |
US1873119A (en) * | 1927-07-20 | 1932-08-23 | Doherty Res Co | Air cooled valve and valve seat |
DE744250C (de) * | 1939-08-02 | 1944-11-17 | Daimler Benz Ag | Einrichtung zur Vermeidung von Beschaedigungen der Auslassventile durch Auspuffgase in Hochleistungsbrennkraftmaschinen |
GB532571A (en) * | 1939-09-08 | 1941-01-27 | Herbert Frank Percy Purday | Improvements relating to the inlet valves of internal combustion engines |
FR1481241A (fr) * | 1966-04-07 | 1967-05-19 | Semt | Procédé et dispositif de refroidissement forcé d'une soupape de machine thermique ou analogue et leurs diverses applications |
GB1215972A (en) * | 1967-05-25 | 1970-12-16 | Semt | Improvements in or relating to poppet valves |
US3820522A (en) * | 1970-01-23 | 1974-06-28 | Daimler Benz Ag | Valve seat for the inlet valve in the cylinder head of a four cycle internal combustion engine |
US4106466A (en) * | 1976-08-16 | 1978-08-15 | Caterpillar Tractor Co. | Engine valve with recessed seat and annular groove |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4301632A1 (de) * | 1993-01-22 | 1994-07-28 | Audi Ag | Ventilsitzring |
DE4301632C2 (de) * | 1993-01-22 | 2001-08-02 | Audi Ag | Ventilsitzring |
DE19754138A1 (de) * | 1997-12-05 | 1999-06-10 | Bayerische Motoren Werke Ag | Hubventil einer Brennkraftmaschine, insbesondere Einlaß-Hubventil |
DE19754138B4 (de) * | 1997-12-05 | 2008-04-03 | Bayerische Motoren Werke Ag | Hubventil einer Brennkraftmaschine, insbesondere Einlaß-Hubventil |
WO2002006640A1 (fr) * | 2000-07-18 | 2002-01-24 | Man B & W Diesel A/S | Dispositif de soupape de commutation des gaz et conception de siege de soupape avec rainure annulaire |
CN100410501C (zh) * | 2000-07-18 | 2008-08-13 | 曼B与W狄赛尔公司 | 换气阀装置 |
EP2287450A1 (fr) * | 2009-08-07 | 2011-02-23 | Yamaha Hatsudoki Kabushiki Kaisha | Soupape d'admission, moteur à combustion interne et appareil de transport l'incorporant |
US8245682B2 (en) | 2009-08-07 | 2012-08-21 | Yamaha Hatsudoki Kabushiki Kaisha | Inlet valve, internal combustion engine and transportation apparatus including the same |
NO20140690A1 (no) * | 2014-06-03 | 2015-12-04 | Bergen Engines As | Innløpsventil for en motor |
EP3450707B1 (fr) | 2017-08-30 | 2020-09-30 | MAN Truck & Bus SE | Soupape de moteur à combustion interne |
EP3450707B2 (fr) † | 2017-08-30 | 2023-08-16 | MAN Truck & Bus SE | Soupape de moteur à combustion interne |
WO2020185337A1 (fr) * | 2019-03-13 | 2020-09-17 | Caterpillar Inc. | Insert de siège de soupape pour tête de moteur dotée de couronnes d'écoulement venturi et d'une surface de siège profilée pour limiter le renfoncement de soupape |
US11060425B2 (en) | 2019-03-13 | 2021-07-13 | Caterpillar Inc. | Valve seat insert for engine head having venturi flow crowns and seating surface profiled for limiting valve recession |
CN113557351A (zh) * | 2019-03-13 | 2021-10-26 | 卡特彼勒公司 | 用于发动机缸盖的具有文丘里流动冠部和构形用于限制阀凹陷的座面的阀座插件 |
CN113557351B (zh) * | 2019-03-13 | 2024-03-05 | 卡特彼勒公司 | 用于发动机缸盖的具有文丘里流动冠部和构形用于限制阀凹陷的座面的阀座插件 |
Also Published As
Publication number | Publication date |
---|---|
NO154807B (no) | 1986-09-15 |
ES8105441A1 (es) | 1981-06-01 |
ES494569A0 (es) | 1981-06-01 |
DK361279A (da) | 1981-03-01 |
PL226485A1 (fr) | 1981-05-22 |
IE801810L (en) | 1981-02-28 |
YU213080A (en) | 1983-01-21 |
NO154807C (no) | 1986-12-29 |
JPS6336403B2 (fr) | 1988-07-20 |
BR8005413A (pt) | 1981-03-10 |
PL124723B1 (en) | 1983-02-28 |
IE50116B1 (en) | 1986-02-19 |
DK144217C (da) | 1982-06-21 |
EP0024890B1 (fr) | 1984-03-14 |
NO802533L (no) | 1981-03-02 |
DK144217B (da) | 1982-01-18 |
FI67252C (fi) | 1985-02-11 |
DE3066986D1 (en) | 1984-04-19 |
YU41940B (en) | 1988-02-29 |
JPS5634915A (en) | 1981-04-07 |
FI67252B (fi) | 1984-10-31 |
FI802721A (fi) | 1981-03-01 |
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