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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 3326. Отображено 100.
29-03-2012 дата публикации

Valve lifter for internal combustion engine

Номер: US20120073534A1
Автор: Noriomi Hosaka, Seiji Tsuruta, Tomoya Tanaka
Принадлежит: HITACHI AUTOMOTIVE SYSTEMS LTD

A valve lifter for an internal combustion engine includes a skirt portion formed in a tubular shape; and a crown portion formed integrally with an axially one end side of the skirt portion. The crown portion includes a crown surface configured to slide in contact with an outer circumferential surface of a cam. An axis of the crown portion is eccentric from a center of the cam in a width direction of the cam. The crown surface is formed in a spherical protruding shape to have its uppermost portion at a center of the crown surface. A protruding amount of the spherical protruding shape is set to range from 11 μm to 50 μm.

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Номер записи: 1
17-01-2013 дата публикации

Eccentricity tolerant valve stem seal assembly

Номер: US20130015625A1
Автор: Alexander S. Williamson, Robert W. Lehmann, Timothy A. Hegemier
Принадлежит: Individual

An eccentricity tolerant valve stem seal assembly includes an elastomeric seal having an upper metal retainer extending down and within an upper seal portion which has an inwardly directed sealing lip for contacting a valve stem. There are also a flexible middle and a lower seal portions. The lower seal portion is connected to a lower metal seal retainer that is disposed up to a lower edge of the middle seal portion. The flexible middle seal portion allows the upper seal portion to flex from an eccentric valve stem without losing the sealing function of the sealing lip. In cooperation with the above described structure, a separate cover may be in a tight tolerance fit with the lower seal retainer over top of the eccentricity tolerant valve stem seal, in order to limit axial displacement of the upper portion of the seal due to high manifold pressure.

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Номер записи: 2
04-04-2013 дата публикации

VALVE STEM SEAL

Номер: US20130082203A1
Автор: Kurth Juergen, Netzer Juergen
Принадлежит: AKTIEBOLAGET SKF

A valve stem seal () seals a valve stem () that is reciprocally movable in an axial direction. The valve stem seal includes a base body () that is connectable with a valve stem guide (). A first seal lip () is resiliently positioned relative to the base body via an elastic connection () and seals the valve stem relative to an oil chamber (). A second seal lip () is spaced in the axial direction () from the first seal lip and seals the valve stem relative to a gas chamber. The second seal lip is also resiliently positioned relative to the base body via the elastic connection. 1. A valve stem seal for sealing a valve stem that is movable in an axial direction , the valve stem seal comprising:a base body configured to be connected to a valve stem guide that receives and guides the valve stem,a first seal lip configured to seal the valve stem relative to an oil chamber,a second seal lip spaced in the axial direction from the first seal lip and configured to seal the valve stem relative to a gas chamber, andan elastic connection resiliently connecting the first and second seal lips to the base body.2. The valve stem seal according to claim 1 , wherein the elastic connection enables movement of the first and second seal lips in a radial direction that is perpendicular to the axial direction.3. The valve stem seal according to claim 2 , wherein the base body and the first and second seal lips are all integrally made as one piece from the same seal material claim 2 , andwherein the elastic connection is formed from the same seal material and is configured as a connecting bridge that connects the first and second seal lips with the base body.4. The valve stem seal according to claim 3 , wherein the second seal lip is disposed on an arm extending away from the elastic connection in the axial direction.5. The valve stem seal according to claim 4 , wherein the base body includes at least one third seal lip configured to sealingly contact the valve stem guide.6. The valve stem ...

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Номер записи: 3
27-06-2013 дата публикации

Valve Assembly and Method for High Temperature Engines

Номер: US20130160726A1
Автор: Zajac John
Принадлежит:

Valve assembly and method in which a valve member is connected to an elongated lever arm for controlling communication between two chambers in an engine. The valve assembly is disposed at least partially within one of the chambers, and the valve member is moved between open and closed by an actuator connected to the lever arm. In some disclosed embodiments, a pilot valve is opened to equalize pressure on both sides of the valve member prior to moving the valve member toward the open position. In others, where a piston in an expansion cylinder is driven by hot, expanding gases from a separate combustion chamber or heat exchanger, the exhaust valve is closed before the piston has completed its exhaust stroke, and pressure is allowed to build up in the expansion cylinder to a level corresponding to the pressure in the combustion chamber before the valve member is moved toward the open position. 1. A valve assembly for controlling high temperature gases , comprising a valve body having an internal chamber with inlet and outlet ports through which the high temperature gasses flow , a valve seat surrounding one of the ports , a pivotally mounted lever arm fabricated of material having low thermal conductivity extending into the chamber , a valve member connected to the lever arm within the chamber for movement between open and closed positions relative to the valve seat , and an actuator connected to the lever arm outside the valve body , away from the high temperature gases , for moving the valve member between the open and closed positions.2. The valve assembly of wherein the valve chamber and ports are surrounded by thermally insulative material that significantly reduces heat loss from the high temperature gasses to the valve body.3. The valve assembly of wherein the lever arm is mounted to the valve body and connected to the valve member in a manner that permits the valve member to pivot about mutually perpendicular axes into proper alignment with the valve seat as ...

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Номер записи: 4
08-08-2013 дата публикации

Hybrid valve stem seal retainer assembly

Номер: US20130200574A1
Автор: Alexander S. Williamson, Robert W. Lehmann, Timothy A. Hegemier
Принадлежит: Individual

A valve stem seal assembly has a metal retainer, an elastomeric seal, and a metal valve guide. The metal retainer and the elastomeric seal are attached to each other, and the elastomeric seal is in sealable contact with the metal valve guide, while the metal retainer is in metal-to-metal gripping contact with the metal valve guide. A stop may be formed in the metal retainer that cooperates with a shoulder formed in the metal valve guide in order to prevent over-installation of the assembly of the elastomeric seal with attached metal retainer, when this assembly is installed over the metal valve guide.

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Номер записи: 5
29-08-2013 дата публикации

VALVE SYSTEM FOR CONTROLLING THE CHARGE EXCHANGE

Номер: US20130220263A1
Автор: Lehrkamp Arvid, Puck Alexander, Vogelsang Matthias
Принадлежит: MAHLE International GmbH

A valve system for controlling the charge exchange in an internal combustion engine may include a valve seat ring and a valve having a valve seat configured to form a sealing system with the valve seat ring, wherein the valve seat may be nitrocarburised. 1. A valve system for controlling the charge exchange in an internal combustion engine , comprising: a valve seat ring and a valve having a valve seat configured to form a sealing system with the valve seat ring , wherein the valve seat is nitrocarburised.2. The valve system according to claim 1 , wherein the valve of the valve system is not straightened.3. The valve system according to claim 1 , wherein apart from the valve seat claim 1 , the entire valve body is nitrocarburised.4. The valve system according to claim 1 , wherein a nitrocarburised surface layer is formed on the valve seat claim 1 , the nitrocarburised surface layer being produced by a nitrocarburising method in a salt bath.5. The valve system according to claim 1 , wherein the valve includes a Cr—Mn—Si-alloyed austenitic valve steel claim 1 , and the nitrocarburised valve seat includes a 3 μm thick compound layer of the including at least 10-90% by weight of Fe claim 1 , 10-30% by weight of N claim 1 , 2.5-10% by weight of Cr and 0.5-10% by weight of Ni claim 1 , and further wherein a >15 μm thick diffusion layer is formed below the compound layer.6. The valve system according to claim 5 , wherein the valve includes is a Cr—Si-alloyed martensitic valve steel claim 5 , and the nitrocarburised valve seat includes approximately a 3 μm thick compound layer including at least 10-90% by weight of Fe claim 5 , 10-30% by weight of N claim 5 , 2.5-10% by weight of Cr and 0.5-10% by weight of Ni claim 5 , and wherein approximately a >15 μm thick diffusion layer is formed below the compound layer.7. The valve system according to claim 4 , wherein the nitrocarburised surface layer has a hardness of approximately 400 to 1200 HV.8. The valve system according to ...

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Номер записи: 6
03-10-2013 дата публикации

SINTERED ALLOY FOR VALVE SEAT AND MANUFACTURING METHOD OF EXHAUST VALVE SEAT USING THE SAME

Номер: US20130259733A1
Автор: Kim Gyuhwan, Kim Ki Bum, Lee Philgi, Park Jae Suk, Shin Chang-Jin
Принадлежит:

A sintered alloy for a valve seat may be manufactured using a method including: mixing MnS with an alloy powder for a valve seat including C at 0.8-1.2 wt %, Ni at 2.0-4.5 wt %, Cr at 3.0-5.0 wt %, Mo at 16.0-20.0 wt %, Co at 9.0-13.0 wt %, V at 0.05-0.15 wt %, S at 0.2-0.8 wt %, Fe, and additional inevitable impurities; making a first shape by forming the mixed materials; pre-sintering the first formed shape; making a secondary shape by re-pressing the first pre-sintered shape; main-sintering the secondary shape; and tempering the main-sintered secondary shape. 1. A sintered alloy for valve seat , comprising:MnS is added to an alloy that comprises C at 0.8-1.2 wt %, Ni at 2.0-4.5 wt %, Cr at 3.0-5.0 wt %, Mo at 16.0-20.0 wt %, Co at 9.0-13.0 wt %, V at 0.05-0.15 wt %, S at 0.2-0.8 wt %, Fe, and additional inevitable impurities.2. The sintered alloy for valve seat of claim 1 , whereinan amount of MnS of 0.2-2.5 parts by weight with respect to 100 parts by weight of the sintered alloy is added.3. The sintered alloy for valve seat of claim 2 , whereinthe size of MnS particles is smaller than 12 μm.4. The sintered alloy for valve seat of claim 3 , whereinthe MnS comprises Mn at 60-65 wt % and S at 35-40 wt %.5. A manufacturing method of valve seat claim 3 , the method comprising:mixing MnS with an alloy powder for a valve seat comprising C at 0.8-1.2 wt %, Ni at 2.0-4.5 wt %, Cr at 3.0-5.0 wt %, Mo at 16.0-20.0 wt %, Co at 9.0-13.0 wt %, V at 0.05-0.15 wt %, S at 0.2-0.8 wt %, Fe, and additional inevitable impurities;making a first shape by forming the mixed materials;pre-sintering the first formed shape;making a secondary shape by re-pressing the first pre-sintered shape;main-sintering the secondary shape; andtempering the main-sintered secondary shape.6. The method of manufacturing a valve seat of claim 5 , whereinthe amount of MnS is from 0.2 to 2.5 parts by weight with respect to 100 parts by weight of the alloy powder.7. The manufacturing method of valve seat of ...

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Номер записи: 7
17-10-2013 дата публикации

Combustion chamber inserts and associated methods of use and manufacture

Номер: US20130269666A1
Автор: Roy Edward McAlister
Принадлежит: McAlister Technologies LLC

Combustion chamber inserts and associated methods of use and manufacture are disclosed herein. In some embodiments, a combustion chamber assembly comprises a cylinder having a cylinder wall at least partially defining a combustion chamber, an intake valve, an exhaust valve, and a piston. The intake valve has an intake valve surface exposed to the combustion chamber, the exhaust valve has an exhaust valve surface exposed to the combustion chamber, and the piston has a piston surface exposed to the combustion chamber. At least one of the cylinder wall, the intake valve surface, the exhaust valve surface, and/or the piston surface includes an insulative portion composed of a synthetic matrix characterization of crystals that is configured to retain heat in the combustion chamber that is generated from a combustion event in the combustion chamber.

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Номер записи: 8
07-11-2013 дата публикации

Internal Combustion Engine Having Valve Lifters With Misalignment Limiting End Caps

Номер: US20130291812A1
Автор: Sathishkumar Raman, Satish Remala
Принадлежит: Caterpillar Inc

An internal combustion engine includes an engine housing defining a cylinder, and a first and a second gas exchange valve for the cylinder, positioned within the engine housing. The engine further includes a valve actuating mechanism having a first and a second valve lifter reciprocating within adjacent lifter bores to actuate the first and second gas exchange valves. Each of the first and second valve lifters includes an end cap having a misalignment limiting projection, limiting rotation of the valve lifter in response to dynamic perturbation.

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Номер записи: 9
07-11-2013 дата публикации

VALVE SEAT MADE OF IRON-BASED SINTERED ALLOY

Номер: US20130291822A1
Автор: HENMI Hiroji, Shikanai Syuuichi, Takahashi Rintarou
Принадлежит: Kabushiki Kaisha Riken

A valve seat of an iron-based sintered alloy having high wear resistance in a wide temperature range, which can be used in direct injection engines with improved fuel efficiency, low emission and high power, is obtained by limiting the amount of a solid lubricant dispersed in the matrix of the valve seat of an iron-based sintered alloy, and dispersing at least two types of hard particles having different hardnesses in the matrix, thereby providing high strength and self-lubrication, as well as improved wear resistance under no lubrication in a wide temperature range. 1. A valve seat of an iron-based sintered alloy , in which at least two types of hard particles having different hardnesses , and 0.2-0.8% by mass of a solid lubricant are dispersed.2. The valve seat of an iron-based sintered alloy according to claim 1 , wherein at least two types of said hard particles having different hardnesses comprise 2-8% by mass of first hard particles having an average particle size of 50-150 μtm and Vickers hardness Hv of 800-1200 claim 1 , and 5-15% by mass of second hard particles having an average particle size of 10-150 μm and Vickers hardness Hv of 400-750.3. The valve seat of an iron-based sintered alloy according to wherein said first hard particles are made of an Fe-Mo-Si alloy comprising by mass 40-70% of Mo claim 1 , and 0.1-2.0% of Si claim 1 , the balance being Fe and inevitable impurities claim 1 , and said second hard particles are made of an Fe-C-Cr-Mo-V alloy comprising by mass 0.2-0.5% of C claim 1 , 0.5-5% of Cr claim 1 , 1-5% of Mo claim 1 , and 2-5% of V claim 1 , the balance being Fe and inevitable impurities.4. The valve seat of an iron-based sintered alloy according to claim 1 , wherein matrix claim 1 , in which at least two types of said hard particles having different hardnesses and said solid lubricant are dispersed claim 1 , has a composition comprising by mass 0.5-2.5% of C claim 1 , 0.4-2% of Si claim 1 , 0.5-5% of Mo claim 1 , and 1-5% of Ni claim ...

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Номер записи: 10
21-11-2013 дата публикации

HIGH-TOUGHNESS COBALT-BASED ALLOY AND ENGINE VALVE COATED WITH SAME

Номер: US20130306019A1
Автор: Kurahashi Kazunori, Nishimura Shinichi, Otobe Katsunori
Принадлежит:

A surface hardening material being excellent in impact resistance and having abrasion resistance is provided. Provided are: a high-toughness cobalt-based alloy containing 25.0 to 40.0 mass % of Cr, 0.5 to 12.0 mass % of a sum of W and/or Mo, 0.8 to 5.5 mass % of Si, and 0.5 to 2.5 mass % of B, 8.0 mass % or less of each of Fe, Ni, Mn, and Cu, and 0.3 mass % or less of C, the sum amount of Fe, Ni, Mn, and C being 10.0 mass % or less, and the remainder comprising 48.0 to 68.0 mass % of Co and unavoidable impurities; and an engine valve coated with the same. 1. A high-toughness cobalt-based alloy containing 25.0 to 40.0 mass % of Cr , 0.5 to 12.0 mass % of a sum of W and/or Mo , 0.8 to 5.5 mass % of Si , and 0.5 to 2.5 mass % of B , wherein the remainder comprises 48.0 to 68.0 mass % of Co and unavoidable impurities.2. The high-toughness cobalt-based alloy according to claim 1 , further containing 8.0 mass°/or less of each of Fe claim 1 , Ni claim 1 , Mn claim 1 , and Cu claim 1 , and 0.3 mass % or less of C claim 1 , wherein the sum amount of Fe claim 1 , Ni claim 1 , Mn claim 1 , Cu claim 1 , and C is 10.0 mass % or less.3. An engine valve filled or coated with a high-toughness cobalt-based alloy according to .4. The engine valve according to claim 3 , wherein at least a face surface abutting against a sheet is filled or coated with said high-toughness cobalt-based alloy. The present invention relates to a surface hardening material used in various construction processes such as PTA powder overlay welding, TIG overlay welding, and thermal spraying, and more particularly to a high-toughness cobalt-based alloy used in a member that demands an impact resistance and to an engine valve coateded with the same.Conventionally, in an engine valve, a Co—Cr—W—C type material represented by Stellite (registered trademark) (including patent documents 1, 2) and a Co—Mo—Si type material represented by Tribaloy (registered trademark) (including patent documents 3 to 7) are used, and ...

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Номер записи: 11
28-11-2013 дата публикации

Systems, methods, and devices for valve stem position sensing

Номер: US20130312506A1
Автор: Douglas John NIELSEN, Mark William Hildebrandt
Принадлежит: Eaton Corp

A linear variable differential transformer (LVDT) for monitoring engine valve position is disclosed. The system includes a valve guide having an elongated recess through it. The engine valve has a valve head and a valve stem with two adjacent materials having different magnetic properties meeting at an interface. The valve stem fits and moves linearly within the valve guide, and the valve head closes an engine combustion chamber. It also includes monitoring coils within the valve guide that create a signal related to the position of the interface within the valve guide. An engine control unit (ECU) is coupled to the monitoring coils and receives and analyzes the signal from the monitoring coils to determine operation of the valve.

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Номер записи: 12
16-01-2014 дата публикации

Cylinder structure for internal combustion engine

Номер: US20140014058A1
Автор: Hideaki Okumura, Kim ihiko Maehata, Yuta Furukawa
Принадлежит: Mitsubishi Heavy Industries Ltd

A cylinder structure satisfies the following conditions: 12%≦d/a≦27%, where d is a distance between a cylinder inner surface 12 a and an exhaust valve member 20 b, and a is a diameter of the exhaust valve member; 40%≦c/b≦50%, where c is a length of a non-guided portion of the exhaust valve 20 located below a lower end of a sleeve 26 when the exhaust valve 20 is closed, and b is a diameter of a cylinder bore; and 0.5%≦e/S≦0.8%, where e is a gap between an exhaust valve rod 20 a and the sleeve 26 and S is a diameter of the exhaust valve rod 20 a.

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Номер записи: 13
03-01-2019 дата публикации

METHOD OF MANUFACTURING HIGH-CONDUCTIVITY WEAR RESISTANT SURFACE ON A SOFT SUBSTRATE

Номер: US20190001447A1
Автор: Dutta Bhaskar
Принадлежит:

A method of forming a valve seat of an engine head formed from a first composition includes forming a groove at a predetermined valve seat location of a bore defined by the engine head. A source of directed heat energy preheats at least the valve seat location to about a temperature of the melting point of the first composition with the source of directed heat energy. The source of directed heat energy is infused with a material having a second composition generating a melt pool upon the groove by direct metal deposition with the melt pool including the second composition. The second composition includes a heat conductivity generally equal to a heat conductivity of the first composition for providing efficient transfer of heat energy from the first composition to the second composition. 1. A method of forming a valve seat of an engine head formed from a first composition includes the steps of:forming a groove at a predetermined valve seat location of a bore defined by said engine head;providing a source of directed heat energy;preheating at least said valve seat location to about a temperature of the melting point of the first composition with the source of directed heat energy;infusing the source of directed heat energy with a material having a second composition and generating a melt pool upon the groove by direct metal deposition, with the melt pool including the second composition; andsaid second composition including a heat conductivity generally equal to or greater than a heat conductivity of the first composition for providing efficient transfer of heat energy from the first composition to the second composition.2. The method set forth in claim 1 , wherein said step of infusing the source of directed heat energy with a material having a second composition is further defined by providing a second composition comprising:copper in the amount of 40-50 percent by weight;cobalt in the amount of 15-25 percent by weight;carbon in the amount of less than 0.1 percent ...

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Номер записи: 14
04-01-2018 дата публикации

Pivoting Piston Machine

Номер: US20180003106A1
Автор: Herbert Huettlin
Принадлежит: Innowatt GmbH

A pivoting piston machine includes a housing, a first piston and a second piston arranged in the housing, the first and second pistons being pivotable away from one another and toward one another about a pivot axis. The machine has a working chamber arranged between first and second piston. The working chamber increases and decreases in size in alternating fashion during pivoting of the first piston and of the second piston. The machine also has a inlet mouth for admission and discharge of the working medium. A closing element for closing and opening the inlet or the outlet has a valve disk interacting with a valve seat. Either the inlet mouth or the outlet mouth is arranged within the working chamber between the first end surface and the second end surface, and the valve seat and the valve disk are arranged at either the inlet mouth or the outlet mouth.

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Номер записи: 15
07-01-2021 дата публикации

Hollow Exhaust Poppet Valve

Номер: US20210003044A1
Автор: HASEGAWA Jin, KUNITAKE Koji, SASAGAWA Yuki
Принадлежит:

In a hollow exhaust poppet valve including a fillet increasing in diameter toward a leading end, a stem, and a head and having a coolant within a hollow part formed from the head to the stem, the stem includes a first stem part on a base end side, and a second stem part integrated with the first stem part via a step part and integrated with the fillet, and the hollow part includes a first hollow part formed inside the first stem part, and a second hollow part formed inside the second stem part, the fillet, and the head in such fashion as to have a constant inner diameter greater than the first hollow part and formed so as to be continuous with the first hollow part via a tapered part or a curved part. 1. A hollow exhaust poppet valve including a stem and a head integrated via a fillet that increases in diameter toward a leading end and having coolant within a hollow part formed from the head to the stem , whereinthe stem includesa first stem part on a base end side, and a second stem part integrated with the first stem part via a step part, integrated with the fillet, and having a wall thickness and an outer diameter larger than the first stem part, and whereinthe hollow part includesa first hollow part formed inside the first stem part, anda second hollow part formed inside the second stem part, the fillet, and the head in such fashion as to have a constant inner diameter larger than the first hollow part and formed so as to be continuous with the first hollow part via a connecting portion.2. The hollow exhaust poppet valve according to claim 1 , wherein the second hollow part has a shape of a plurality of hollow parts different in inner diameter continuously arranged from a base end part to a leading end part in ascending order of inner diameter.3. The hollow exhaust poppet valve according to claim 2 , wherein the connecting portion is one among a plurality of connecting portions by way of which the plurality of hollow parts different in inner diameter are ...

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Номер записи: 16
08-01-2015 дата публикации

Cylinder head assembly having cooled valve insert

Номер: US20150007792A1
Автор: Raji Rexavier, Seema Iffat Farooqui
Принадлежит: Electro Motive Diesel Inc

An cylinder head assembly is disclosed. The cylinder head assembly may include a cylinder head having a stepped bore associated with a valve opening. The cylinder head assembly may also include an insert configured to engage the stepped bore, and a cooling passage at least partially formed by the insert and the stepped bore.

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Номер записи: 17
12-01-2017 дата публикации

Valve stem seal

Номер: US20170009616A1
Автор: Hiroki SHISHIDO, Tsunehisa Onuma
Принадлежит: Nok Corp

A valve stem seal exhibits superior workability of mounting of a reinforcing ring to a valve stem guide and enables the reinforcing ring to be fixed to the valve stem guide in a stable manner. A reinforcing ring is mounted to a valve stem guide by fitting a cylindrical portion to the valve stem guide from a side opposite to an inward flange portion. The cylindrical portion includes a slit extending linearly in a circumferential direction and a locking protrusion that is provided on a side opposite to the inward flange portion with respect to the slit and that is to be locked by a locking recess formed in the valve stem guide. The locking protrusion is constituted by a curved portion that is gradually recessed radially inward from the side opposite to the inward flange portion with respect to the slit to a position that reaches the slit.

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Номер записи: 18
09-01-2020 дата публикации

Sliding member, and sliding member for internal combustion engine

Номер: US20200011211A1
Автор: Junichi Arai, Katsunori Otobe, Shinichi Nishimura, Yoshinori Izawa
Принадлежит: Fukuda Metal Foil and Powder Co Ltd, Nissan Motor Co Ltd

A sliding member for an internal combustion engine includes the sliding member at a sliding part of the internal combustion engine.

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Номер записи: 19
09-01-2020 дата публикации

VALVE ARRANGEMENT AND VALVE GUIDE

Номер: US20200011213A1
Автор: Langervik Lennart, Svensson Stig Arne
Принадлежит:

A valve arrangement for supplying air to an internal combustion engine includes a first valve and a second valve arranged within the first valve. A valve guide for use in a valve arrangement is also provided. 1. A valve arrangement for supplying air to an internal combustion engine , the valve arrangement comprising:a first valve for controlling an air supply to a cylinder, the first valve being movable between a closed position in which the air cannot be supplied to the cylinder and an open position in which the air is supplied to the cylinder, the first valve comprising: a first valve head, and a first valve stem comprising an inlet in a side wall of the first valve stem, wherein the inlet is configured to receive additional air from a feeder channel, the first valve stem further comprising an internal passage, arranged in the length direction of the valve stem and fluidly connected to the inlet and configured to supply the additional air to the cylinder;a second valve arranged within the first valve and configured to control the flow of additional air to the cylinder, the second valve comprising a second valve stem and a second valve head in contact with an inner surface of the first valve head when the second valve is in a closed position;a tubular valve guide arranged to surround a portion of the first valve stem such that the first valve stem is movable in the valve guide;wherein the valve guide comprises an inner groove forming a cavity between the valve guide and the first valve stem, wherein the valve guide further comprises a valve guide aperture configured to fluidly connect the inner groove to the feeder channel, and wherein the inlet of the first valve stem is aligned with the valve guide aperture when the first valve is in a closed position.2. The valve arrangement according to claim 1 , wherein the valve guide is made from a single piece.3. The valve arrangement according to claim 1 , wherein the inner groove is arranged to span the inner ...

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Номер записи: 20
09-01-2020 дата публикации

SLIDING MEMBER, AND SLIDING MEMBER OF INTERNAL COMBUSTION ENGINE

Номер: US20200011216A1
Автор: Izawa Yoshinori
Принадлежит: NISSAN MOTOR CO., LTD.

A sliding member includes a base substrate and a coating layer formed on the base substrate. The coating layer includes an inorganic part derived from at least one type of inorganic particles selected from the group consisting of iron base alloy particles, cobalt base alloy particles, chromium base alloy particles, nickel base alloy particles, molybdenum base alloy particles, and ceramic particles, and a metal part derived from at least one type of metal particles selected from the group consisting of iron base alloy particles other than listed in the above group, copper particles, and copper alloy particles. The inorganic part is bonded to another inorganic part and/or the metal part via interfaces therebetween, and the metal part is bonded to another metal part and/or the inorganic part via interfaces therebetween. The sliding member includes an interface layer including at least one of a diffusion layer and an intermetallic compound layer on at least one part of an interface between the base substrate and the coating layer or interfaces between the inorganic part and the metal part, the inorganic parts, and the metal parts. The interface layer has a thickness of equal to or less than 2 μm. 18-. (canceled)9. A sliding member comprising a base substrate and a coating layer formed upon the base substrate ,whereinthe coating layer comprises an inorganic portion derived from at least one type of inorganic particles selected from the group consisting of iron base alloy particles, cobalt base alloy particles, chromium base alloy particles, nickel base alloy particles, molybdenum base alloy particles, and ceramic particles, and a metal portion derived from at least one type of metal particles selected from the group consisting of iron base alloy particles other than listed in the above group, copper particles, and copper alloy particles, with the inorganic portion and the metal portion being bonded together via. an interface;the sliding member includes an interface layer ...

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Номер записи: 21
09-01-2020 дата публикации

Internal combustion engine

Номер: US20200011237A1
Автор: Akio Kawaguchi, Fumio Shimizu, Hideo Yamashita, Keisuke Tanaka, Naoki Nishikawa, Toshio Horie, Yoshifumi Wakisaka
Принадлежит: Toyota Motor Corp

The present embodiment relates to an internal combustion engine having an anodic oxide coating formed on at least a portion of an aluminum-based wall surface facing a combustion chamber. The anodic oxide coating has a plurality of nanopores extending substantially in the thickness direction of the anodic oxide coating, a first micropore extending from the surface toward the inside of the anodic oxide coating, and a second micropore present in the inside of the anodic oxide coating; the surface opening diameter of the nanopores is 0 nm or larger and smaller than 30 nm; the inside diameter of the nanopores is larger than the surface opening diameter; the film thickness of the anodic oxide coating is 15 μm or larger and 130 μm or smaller; and the porosity of the anodic oxide coating is 23% or more.

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Номер записи: 22
03-02-2022 дата публикации

ENGINE VALVE WITH RAISED RING OR DIMPLE

Номер: US20220034243A1
Автор: Krieger Jeffrey Clark, Rader Kyle Michael, Roley Michael D.
Принадлежит: CATERPILLAR INC.

An engine valve includes a stem, a head comprising an outer lip surface, a seating surface extending from the outer lip surface toward the stem, and a combustion surface extending from the outer lip surface on the opposite side of the head as compared to the seating surface. The combustion surface includes a first convex arcuate surface spaced away from the outer lip surface, at least partially forming a raised ring, and a first concave arcuate surface spaced away from the outer lip surface, at least partially forming a dimple. 1. An engine head assembly for an internal combustion engine comprising:an engine head having a fluid conduit formed therein; andan engine valve including a stem, a head comprising an outer lip surface, a seating surface interposed between the stem and the outer lip surface, and a combustion surface extending from the outer lip surface on the opposite side of the head as compared to the seating surface;wherein the combustion surface includes a first convex arcuate surface spaced away from the outer lip surface, at least partially forming a raised ring, and a first concave arcuate surface spaced away from the outer lip surface, at least partially forming a dimple, and the engine valve includes a body of revolution, defining an axis of revolution, and the raised ring defines a lower axial extremity of the engine valve.2. The engine head assembly of wherein the body of revolution of the engine valve claim 1 , defines an axis of revolution claim 1 , a radial direction perpendicular to the axis of revolution claim 1 , and a circumferential direction about the axis of revolution claim 1 , and the raised ring and the dimple extend circumferentially about the axis of revolution.3. The engine head assembly of wherein the first convex arcuate surface is spaced away a first radial distance from the outer lip surface claim 2 , and the first concave arcuate surface is spaced away from the outer lip surface a second radial distance from the outer lip ...

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Номер записи: 23
21-01-2016 дата публикации

DLC FILM COATING AND COATED VALVE LIFTER

Номер: US20160017477A1
Автор: Ishii Shinichi, Kubota Yukio
Принадлежит:

[Problems to be Solved] The present invention provides a DLC (diamond like carbon) film coating and a coated valve lifter, wherein the DLC film can be formed at a film forming rate comparable with that achieved in the case of forming the DLC coating film by the CVD (chemical vapor deposition) method and has good durability comparable with that obtained in the case of forming the DLC film coating by the sputtering film forming method. 1. A DLC film coating comprising:an intermediate layer deposited on a surface of a base substrate of a mechanical element constituting an internal combustion engine and a DLC (diamond like carbon) layer deposited on the intermediate layer, whereinthe intermediate layer is formed by sputtering processing of a metal carbide or metal capable of forming a hard surface: andthe DLC layer is formed by performing sputtering processing of carbon under such a circumstance where inert gas containing hydrocarbon gas is being introduced and continuing the sputtering processing of the intermediate layer to add a common metal element to that contained in the intermediate layer thereto until completing the formation of the DLC layer, while an amount of the metal element to be added the DLC layer is raduall reduced as the thickness of the DLC layer formed on the intermediate layer becomes thicker.2. (canceled)3. A DLC film in accordance with claim 1 , wherein W (tungsten) is selected as the common metal element.4. (canceled)5. A DLC film coating in accordance with claim 3 , wherein the DLC layer is formed by controlling the amount of the metal element to be added thereto within 0.5 to 20 at % (atomic percent) at the surface of the DLC layer6. A DLC film coating in accordance with claim 3 , wherein the DLC layer is formed by controlling an H content contained therein within 8 to 30 at %.7. (canceled)8. A DLC film coating in accordance with any one of claim 3 , claim 3 , and claim 3 , wherein the mechanical element is specified as a valve train mechanical ...

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Номер записи: 24
18-01-2018 дата публикации

SEALING UNIT AND FLUID ENGINE

Номер: US20180016952A1
Автор: Buffery Harry Martin, Hordley Timothy Stephen, Lucking Graham Stuart, Palmer Don Charles
Принадлежит:

A valve stem sealing unit () for forming a seal round a valve stem () of a poppet valve () in an engine () having a body () and operated by a working fluid, the valve stem sealing unit () including: a housing () defining a through passage () running from a first end to a second end, the through passage () being arranged to receive a portion of the valve stem (); a first seal () arranged to form a seal between the valve stem () and the housing () to prevent egress of the working fluid from the first end of the housing (); and a second seal () arranged to form a seal between the housing () and a body () of the engine () to prevent egress of the working fluid from the second end of the housing (). 115-. (canceled)15. A fluid engine arranged to be driven by a change in pressure of a working fluid , the fluid engine having one or more possible leakage points , and including a working fluid collecting system , to collect any working fluid that leaks from the leakage points , the working fluid collecting system including:a cover constructed and arranged to form a sealed space around at least one of the leakage points;means for condensing working fluid leaking into the cover; andmeans for collecting the condensed working fluid.16. The fluid engine of claim 15 , wherein the means for condensing the working fluid includes a heat exchange fluid at lower temperature than the working fluid claim 15 , such that heat exchange between the working fluid and heat exchange fluid cools the working fluid.17. The fluid engine of claim 16 , wherein the means for condensing the working fluid includes a heat exchanger for exchanging heat between the working fluid and the heat exchange fluid.18. (canceled)19. The fluid engine of claim 16 , wherein the means for condensing the working fluid includes a cooling jacket arranged around the cover claim 16 , such that the working fluid condenses in the space formed by the cover.20. (canceled)21. The fluid engine of claim 20 , wherein the space ...

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Номер записи: 25
17-01-2019 дата публикации

Secure Engine Insert and Process for Installing

Номер: US20190017419A1
Автор: Frank J. Ardezzone
Принадлежит: Individual

An engine insert having an insert appendage that projects outwardly from the insert body in a direction away from the seat face, into an engine, such as to form an engine finger void between the appendage and the insert axis, in which engine finger void a finger of engine material may be positioned between the insert appendage and the insert axis.

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Номер записи: 26
26-01-2017 дата публикации

Method for manufacturing a metallic component by pre-manufactured bodies

Номер: US20170021423A1
Автор: Johan SUNDSTRÖM, Martin Östlund, Rickard Sandberg, Tomas Berglund
Принадлежит: Sandvik Intellectual Property AB

A method for manufacturing a metallic component including the steps of providing a capsule, which defines at least a portion of the shape of the metallic component, arranging metallic material in the capsule, sealing the capsule, subjecting the capsule to Hot Isostatic Pressing for a predetermined time, at a predetermined pressure and at a predetermined temperature, and optionally, removing the capsule. The metallic material is at least one pre-manufactured coherent body, which pre-manufactured coherent body being made of metallic powder, wherein at least a portion of the metallic powder is consolidated such that the metallic powder is held together into a pre-manufactured coherent body. At least one portion of the pre-manufactured coherent body is manufactured by Additive Manufacturing by subsequently arranging superimposed layers of metallic powder.

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Номер записи: 27
10-02-2022 дата публикации

COATING METHOD

Номер: US20220042177A1
Автор: FUJIKAWA Masahito, HAMASAKI Junichi, Inoguchi Masatoshi, Kamada Koukichi, MATSUYAMA Hidenobu, Noshi Yoshitsugu, Okamoto Naoki, SHIBAYAMA Hirohisa, SHIOTANI Eiji
Принадлежит: NISSAN MOTOR CO., LTD.

When forming valve seat coats at opening portions (to ) of intake ports () provided at a cylinder block mounting surface () of a semimanufactured cylinder head (), the nozzle of a cold spray apparatus moves along a nozzle movement path for air intake (Inp) that is set between any two of the plurality of opening portions (to ), while continuing to spray a raw material powder. When forming valve seat coats at opening portions (to ) of exhaust ports (), the nozzle moves along a nozzle movement path for air exhaust (Enp) that is set between any two of the plurality of opening portions (to ), while continuing to spray the raw material powder. 111.-. (canceled)12. A coating method comprising:preparing a coating target component having a plurality of coating portions that are not continuous with one another;causing each of the plurality of coating portions and a nozzle of a cold spray apparatus to sequentially face each other while relatively moving the coating target component and the nozzle; andspraying a raw material powder onto the coating portions facing the nozzle using a cold spray method to form a coat on each of the plurality of coating portions,wherein in a nozzle movement path from a coating portion having been formed with the coat to another coating portion to be subsequently formed with the coat, injection of the raw material powder from the nozzle is continued and an angle of the nozzle with respect to the coating target component is set larger or smaller than that when the nozzle forms coats on the coating portions.13. A coating method comprising:preparing a semimanufactured cylinder head having a main body portion with a cylinder block mounting surface, a combustion chamber upper wall portion provided at the cylinder block mounting surface, and a plurality of opening portions of intake or exhaust ports, the opening portions being not continuous with one another;causing each of the plurality of opening portions and a nozzle of a cold spray apparatus to ...

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Номер записи: 28
04-02-2016 дата публикации

EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE INTERNAL COMBUSTION ENGINE

Номер: US20160032793A1
Автор: Berger Christian, DOPPELBAUER Markus, Jurjevec Ralph, ROLAND Guenther, Zauner Gunther
Принадлежит:

An exhaust valve assembly for a two-stroke internal combustion engine has a valve actuator having a first pressure chamber and a second pressure chamber, and a valve operatively connected to the valve actuator. The first and second pressure chambers are adapted for selectively receiving one of a first pressure and a second pressure. The first pressure is higher than the second pressure. The valve actuator moves the valve between at least a first valve position and a second valve position. The valve actuator moves the valve to the first valve position when the first pressure is supplied to the first pressure chamber and the second pressure is supplied to the second pressure chamber. The valve actuator moves the valve to the second valve position when the second pressure is supplied to the first pressure chamber and the first pressure is supplied to the second pressure chamber. 1. An exhaust valve assembly for a two-stroke internal combustion engine comprising:a valve actuator having a first pressure chamber and a second pressure chamber,the first pressure chamber being adapted for selectively receiving one of a first pressure and a second pressure,the second pressure chamber being adapted for selectively receiving one of the first pressure and the second pressure,the first pressure being higher than the second pressure; anda valve operatively connected to the valve actuator, the valve actuator moving the valve between at least a first valve position and a second valve position,the valve actuator moving the valve to the first valve position when the first pressure is supplied to the first pressure chamber and the second pressure is supplied to the second pressure chamber, andthe valve actuator moving the valve to the second valve position when the second pressure is supplied to the first pressure chamber and the first pressure is supplied to the second pressure chamber.2. The exhaust valve assembly of claim 1 , wherein the valve actuator moves the valve between the ...

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Номер записи: 29
01-02-2018 дата публикации

HYBRID COMPOSITE CYLINDER HEAD

Номер: US20180030920A1
Автор: Madin Mark Michael, Wicks Christopher Donald
Принадлежит: FORD GLOBAL TECHNOLOGIES, LLC

An engine cylinder head includes an internal metal structure formed from a metal material, at least a portion of which includes a thermal coating and an external polymer composite structure formed from a polymer composite material, wherein the external polymer composite structure at least partially surrounds the internal metal structure. 1. An engine cylinder head comprising:an internal metal structure formed from a metal material, at least a portion of which includes a thermal coating; andan external polymer composite structure formed from a polymer composite material, wherein the external polymer composite structure at least partially surrounds the internal metal structure.2. The engine cylinder head of claim 1 , wherein the internal metal structure includes a fire deck with an exhaust port surface and the thermal coating covers the exhaust port surface.3. The engine cylinder head of claim 1 , wherein the internal metal structure forms a combustion chamber coated with the thermal coating.4. The engine cylinder head of claim 1 , wherein the internal metal structure includes a valve seat insert coated with the thermal coating.5. The engine cylinder head of claim 1 , further including a valve.6. The engine cylinder head of claim 5 , wherein at least a portion of the valve includes a thermal coating.7. The engine cylinder head of claim 6 , wherein an entire surface of a valve head face of the valve includes the thermal coating.8. The engine cylinder head of claim 5 , wherein an entire valve and its surfaces are made from ceramic.9. The engine cylinder head of claim 1 , wherein the thermal coating is a ceramic coating.10. The engine cylinder head of claim 1 , wherein the external polymer composite structure is made from a thermoset resin.11. An engine cylinder head comprising:an internal metal structure formed from a metal material;an external polymer composite structure formed from a polymer composite material; andan exhaust valve and an intake valve,wherein at least ...

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Номер записи: 30
01-02-2018 дата публикации

PISTON TOP LAND STRUCTURE

Номер: US20180030921A1
Автор: Montgomery David
Принадлежит: CATERPILLAR INC.

A piston for a premixed spark-ignited or premixed dual fuel internal combustion engine is disclosed. The piston may be configured to reciprocate along a longitudinal axis of a combustion chamber defined by a cylinder of the engine. The piston may comprise a piston head, a top annular groove configured to receive a top annular ring, and a skirt having a pin bore extending along a pin bore axis that is configured to receive a wrist pin for connecting the piston to a connecting rod. The piston may further comprise a top land formed in the piston head that is chamfered in a direction perpendicular to the pin bore axis such that the top land does not contact an inner wall of the cylinder when the piston rocks about the pin bore axis. The top land may be non-chamfered in a direction parallel to the pin bore axis. 1. A piston for a premixed spark-ignited or a premixed dual fuel internal combustion engine , the piston being configured to reciprocate along a longitudinal axis of a combustion chamber defined by a cylinder of the internal combustion engine , comprising:a piston head including an upper surface facing the combustion chamber, and a top annular groove configured to receive a top piston ring;a skirt extending from the piston head and including a pin bore configured to receive a wrist pin for connecting the piston to a connecting rod, the pin bore extending along a pin bore axis; anda top land formed on the piston head and extending between the upper surface and the top annular groove of the piston head, the top land including an upper annular edge that adjoins the upper surface of the piston head and a lower annular edge that adjoins the top annular groove, the upper annular edge having an elliptical shape with a major axis extending parallel to the pin bore axis and a minor axis extending perpendicular to the pin bore axis, the lower annular edge having a circular shape with a diameter substantially equivalent to a length of the major axis of the upper annular ...

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Номер записи: 31
31-01-2019 дата публикации

METHOD FOR FILLING WITH METALLIC SODIUM

Номер: US20190030595A1
Автор: HANAWA Masashige, HOMMA Koichi, MIURA Kuniaki, ONOSE Ryo, UCHIDA Shigeru
Принадлежит:

Provided is a method for filling a stem-side hollow area of an engine valve with metallic sodium. The method includes injecting melted metallic sodium into a cylinder having a larger diameter than an inner diameter of the hollow area of the engine valve, forming a solidified metallic sodium rod having a substantially uniform structure in the cylinder, inserting the metallic sodium into the hollow area of the engine valve through a nozzle having a small diameter, and sealing the engine valve. 15-. (canceled)6. A method for filling a hollow area of a hollow engine valve with metallic sodium , the method comprising:injecting melted metallic sodium into a cylinder having a larger diameter than an inner diameter of the hollow area of the engine valve under a directional solidification condition, at a speed slightly faster than a speed at which a droplet solidifies, and in a form in which no discontinuity occurs;forming a solidified metallic sodium rod having a substantially uniform structure in the cylinder;inserting metallic sodium into the hollow area of the engine valve through a nozzle shaped die having a small diameter while keeping the uniform structure of the metallic sodium rod;cutting the inserted metallic sodium; andsealing the engine valve.7. The method for filling with metallic sodium according to claim 6 , wherein the melted metallic sodium is injected into the cylinder with a boundary of the metallic sodium in the cylinder kept in a semi-solidified condition.8. The method for filling with metallic sodium according to claim 6 , wherein the melted metallic sodium is injected into the cylinder by dripping.9. The method for filling with metallic sodium according to of claim 6 , wherein an inner diameter of the cylinder is within a range of 20 mm to 50 mm claim 6 , a temperature of the metallic sodium is within a range of 180° C. to 250° C. claim 6 , and an injection speed is within a range of 150 g/min to 300 g/min.10. A method for purifying metallic sodium ...

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Номер записи: 32
05-02-2015 дата публикации

IRON-BASED ALLOYS AND METHODS OF MAKING AND USE THEREOF

Номер: US20150034037A1
Автор: Doll David, Dooley Douglas W., Qiao Cong Yue, Vennema Peter
Принадлежит: L. E. Jones Company

An iron-based alloy includes, in weight percent, carbon from about 2 to about 3 percent; manganese from about 0.1 to about 0.4 percent; silicon from about 0.3 to about 0.8 percent; chromium from about 11.5 to about 14.5 percent; nickel from about 0.05 to about 0.6 percent; vanadium from about 0.8 to about 2.2 percent; molybdenum from about 4 to about 7 percent; tungsten from about 3 to about 5 percent; niobium from about 1 to about 3 percent; cobalt from about 3 to about 5 percent; boron from zero to about 0.2 percent; and the balance containing iron and incidental impurities. The alloy is suitable for use in elevated temperature applications such as in valve seat inserts for combustion engines. 1. An iron-based alloy comprising , in weight percent:carbon from about 2 to about 3 percent;manganese from about 0.1 to about 0.4 percent;silicon from about 0.3 to about 0.8 percent;chromium from about 11.5 to about 14.5 percent;nickel from about 0.05 to about 0.6 percent;vanadium from about 0.8 to about 2.2 percent;molybdenum from about 4 to about 7 percent;tungsten from about 3 to about 5 percent;niobium from about 1 to about 3 percent;cobalt from about 3 to about 5 percent;boron from zero to about 0.2 percent; andbalance iron and incidental impurities.2. The alloy according to claim 1 , wherein the carbon content of the alloy is from about 2.4 to about 2.7 weight percent.3. The alloy according to claim 1 , wherein the alloy contains at least about 0.08 weight percent boron.4. The alloy according to claim 1 , wherein the alloy contains at least about 2.4 weight percent carbon and at least about 0.08 weight percent boron.5. The alloy according to claim 1 , wherein the cobalt content of the alloy is from about 3.5 to about 4 weight percent.6. The alloy according to claim 1 , wherein the alloy comprises intradendritic regions containing tempered martensite and interdendritic regions comprising eutectic reaction phases.7. The alloy according to claim 1 , wherein the alloy is ...

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Номер записи: 33
09-02-2017 дата публикации

COMBUSTION ENGINE WITH PNEUMATIC VALVE RETURN SPRING

Номер: US20170037750A1
Автор: CARLSON Urban, Höglund Anders, IVARSSON Lars, KOENIGSEGG Christian
Принадлежит:

A combustion engine includes an engine valve arranged to selectively open/close a combustion chamber of the engine, a cylinder head adjacent the combustion chamber, arranged to guide a valve stem of the engine valve, the engine valve being axially displaceable relative to the cylinder head between the combustion chamber closed position and the combustion chamber fully opened position, and a valve spring retainer connected to the valve stem. The valve spring retainer partly delimits a gas spring volume, which is in fluid communication with an adjacent gas volume via a port when the engine valve is in the combustion chamber closed position, and which is separated from the adjacent gas volume when the engine valve is in the combustion chamber fully open position, the port being open during at least 25% of the maximal stroke of the engine valve and being closed due to a displacement of the engine valve. 250845. The combustion engine according to claim 1 , wherein said port () is open during at least 35 percentage of the maximal stroke of the engine valve () claim 1 , preferably at least percentages.3508. The combustion engine according to claim 1 , wherein said port () is open during a maximum of 70 percentage of the maximal stroke of the engine valve () claim 1 , preferably a maximum of 60 percentages.4373883946394746473737473748. The combustion engine according to claim 1 , wherein the cylinder head comprises a lead through () claim 1 , which is arranged to guide the valve stem () of the engine valve () claim 1 , said valve spring retainer () and a cylinder shaped sleeve () that extends from the valve spring retainer () forming a valve spring cover () claim 1 , the cylinder shaped sleeve () of the valve spring cover () being telescopically displaceable in relation to said lead through () claim 1 , radially outside the lead through () claim 1 , and the valve spring over () and the lead through () delimiting said gas spring volume ().5464750484987. The combustion engine ...

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Номер записи: 34
08-02-2018 дата публикации

INTERNAL COMBUSTION ENGINE AND METHOD FOR COATING INTERNAL COMBUSTION ENGINE COMPONENTS

Номер: US20180038308A1
Автор: ANDRUSKIEWICZ, Durrett Russell P., Hill Gary P., IV Peter P., MARTIN John H., Najt Paul M., Ro Christopher J., SCHAEDLER Tobias A.
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An internal combustion engine includes a component configured to be subjected to combustion gasses, the component includes a substrate presenting a surface and a coating applied to the surface of the substrate. The coating includes an insulating layer applied to the surface having a plurality of microspheres and a sealing layer bonded to the insulating layer and seals against the insulating layer. 1. An internal combustion engine comprising: a substrate presenting a surface; and', an insulating layer applied to the surface having a thickness of between about 50 microns and about 1 millimeter, wherein the insulating layer comprises a plurality of microspheres and a porosity of between about 80% and about 95%; and', 'a sealing layer bonded to the insulating layer and seals against the insulating layer,', 'wherein the sealing layer has a thickness of between about 1 micron and about 20 microns., 'a coating applied to the surface of the substrate including], 'at least one component configured to be subjected to combustion gasses, the component including2. The internal combustion engine of further comprising a bonding layer disposed between and bonded to the surface of the substrate and the insulating layer.3. The internal combustion engine of wherein the bonding layer is formed of one or more elements to balance a coefficient of thermal expansion between the substrate and the insulating layer.4. The internal combustion engine of wherein the bonding layer is formed of one or more elements that may include copper to promote bonding between the substrate and the insulating layer.5. The internal combustion engine of wherein the insulating layer further comprises a matrix material configured to bond with the plurality of microspheres.6. The internal combustion engine of wherein the at least one component is a piston of the internal combustion engine.7. The internal combustion engine of wherein the at least one component is an exhaust port of the internal combustion engine.8. ...

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Номер записи: 35
06-02-2020 дата публикации

Multi-part roller tappet

Номер: US20200041018A1
Автор: Norbert Geyer
Принадлежит: Schaeffler Technologies AG and Co KG

A roller tappet, in particular for a high-pressure fuel pump, is provided that is guided in the direction of the longitudinal axis thereof in a housing receptacle and is driven translatably in the longitudinal direction by cams of a camshaft. The roller tappet has a tappet body. This tappet body has a tappet skirt, a pump piston contact point (9), and a rotatably mounted roller (4), by which the roller tappet is supported on the camshaft. The tappet body has a guide cylinder (1), which is mounted in the housing receptacle and on which the roller (4) is supported, and a cup-shaped sleeve (7) having the pump piston contact point (9), which cup-shaped sleeve is supported in the guide cylinder (1) by a radial ring (8). A cylindrical constriction (5) is formed in the guide cylinder (1) in the region of the radial ring support.

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Номер записи: 36
19-02-2015 дата публикации

Valve seat

Номер: US20150047596A1
Автор: Fusanobu Hanada, Shohtaroh Hara, Yoshio Koyama
Принадлежит: TPR Co Ltd

Provided is a valve seat having excellent strength and wear resistance. In a valve seat using an iron-based sintered alloy, an oxide mains composed of triiron tetroxide is formed by oxidation treatment on the surface and interior of the iron-based sintered alloy, and the average area ratio of the oxide mainly composed of triiron tetroxide in a cross section of the iron-based, sintered alloy in the state prior to installation on a cylinder head is 5 to 20%. Preferably, the iron-based sintered alloy contains hard particles formed from at least one compound of carbides, silicides, nitrides, borides, and intermetallic compounds containing one or more elements selected from groups 4a to 6a of the periodic table, and the average area ratio of the hard particles in the cross section of the iron-based sintered alloy in the state prior to installation on a cylinder head is 5 to 45%.

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Номер записи: 37
15-02-2018 дата публикации

HELICAL FOLLOWER INTERNAL COMBUSTION ENGINE

Номер: US20180045112A1
Автор: COLLINS Evan John, RICHARDSON John Michael
Принадлежит:

The present invention is helical follower internal combustion engine. The present invention has a smooth, cylindrical follower orthogonally attached to a piston rod. The follower fits into two connected half-cylindrical, helical grooves formed by a two-piece cylindrical sleeve. The two-piece cylindrical sleeve is attached to a rotating cylindrical hub. Reciprocal motion of the piston causes rotation of the rotating cylindrical hub. The present invention has a feature that prevents the piston from rotating. The present invention can create electricity by connecting a rotor coil to the rotating cylindrical hub and placing a stator coil in near proximity. In an alternative embodiment, the present invention has an external drive shaft attached to the rotating cylindrical hub. 1. A helical follower internal combustion engine comprising;a piston in a combustion chamber, wherein the piston has a piston head and a piston rod, wherein a fuel-air mixture is capable of moving the piston in a reciprocal motion; and wherein the piston rod has a hole into which is seated and fixed a smooth, cylindrical follower that is orthogonal to the piston rod;a rotating cylindrical hub into which the piston rod extends and to which a rotor coil is attached;a stator coil from which electrical output can be drawn when the rotor coil is rotating;a two-piece cylindrical sleeve, comprised of an upper piece and a lower piece, fastened externally to the rotating cylindrical hub, wherein the two-piece cylindrical sleeve has two half-cylindrical, helical grooves; andan anti-rotation feature that prevents the piston from rotating;wherein the follower fits in the two-half cylindrical, helical grooves.2. The helical follower internal combustion engine of claim 1 , wherein the follower pushes on the lower piece of the two-piece cylindrical sleeve when the piston head moves towards the rotating cylindrical hub claim 1 , causing the rotating cylindrical hub to rotate.3. The helical follower internal ...

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Номер записи: 38
25-02-2021 дата публикации

LIFTER PROVIDING IMPROVED CAM LOBE LUBRICATION

Номер: US20210054767A1
Автор: BALAJI Vaibhav, COFFEY Charles Francis, Hattiangadi Ashwin A., JR. John Stephen, Pipis, YODER Kevin Duane
Принадлежит: CATERPILLAR INC.

A cam follower assembly includes a cam roller, and a generally cylindrical body having an outer peripheral surface configured to be reciprocally slidable within a bore of an engine component. The cam roller is rotatably mounted on the body and configured to engage with a cam lobe on a camshaft of the engine. The cam lobe is operative to drive the body to a position at which the cam follower assembly causes one of opening of a valve or actuation of a fuel injector of the engine. A groove is formed in the body inset from the outer peripheral surface and extending axially along the outer peripheral surface parallel to the longitudinal axis of the body and aligned with an axial median plane of the cam roller and the cam lobe. 1. A cam follower assembly including a cam roller , the cam follower assembly comprising:a generally cylindrical body having an outer peripheral surface configured to be reciprocally slidable within a bore of an engine component;the body rotatably mounting the cam roller with the cam roller being configured to engage with a cam lobe on a camshaft of the engine, wherein the cam lobe is operative to drive the body to a position at which the cam follower assembly causes one of opening of a valve or actuation of a fuel injector of an engine; anda groove formed in the body, the groove being inset from the outer peripheral surface and extending axially along the outer peripheral surface parallel to a longitudinal axis of the body and aligned with an axial median plane of the cam roller and the cam lobe,wherein the body further includes a flared lower portion adjacent to the cam roller, a transverse width of the flared lower portion extending beyond the outer peripheral surface along a transverse direction, the transverse direction being transverse to the longitudinal axis,wherein the flared lower portion defines a bore hole extending therethrough, andwherein the groove is coextensive with the bore hole along the transverse direction.2. The cam follower ...

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Номер записи: 39
23-02-2017 дата публикации

IRON-BASED ALLOYS AND METHODS OF MAKING AND USE THEREOF

Номер: US20170051642A1
Автор: Doll David, Dooley Douglas W., Qiao Cong Yue, Vennema Peter
Принадлежит:

An iron-based alloy includes, in weight percent, carbon from about 2 to about 3 percent; manganese from about 0.1 to about 0.4 percent; silicon from about 0.3 to about 0.8 percent; chromium from about 11.5 to about 14.5 percent; nickel from about 0.05 to about 0.6 percent; vanadium from about 0.8 to about 2.2 percent; molybdenum from about 4 to about 7 percent; tungsten from about 3 to about 5 percent; niobium from about 1 to about 3 percent; cobalt from about 3 to about 5 percent; boron from zero to about 0.2 percent; and the balance containing iron and incidental impurities. The alloy is suitable for use in elevated temperature applications such as in valve seat inserts for combustion engines. 1. An iron-based alloy comprising , in weight percent:carbon from about 2 to about 3 percent;manganese from about 0.1 to about 0.4 percent;silicon from about 0.3 to about 0.8 percent;chromium from 11.5 to about 14.5 percent;nickel from about 0.05 to about 0.6 percent;vanadium from about 0.8 to about 2.2 percent;molybdenum from about 4 to about 7 percent;tungsten from about 3 to about 5 percent;niobium from about 1 to about 3 percent;cobalt from about 3 to about 5 percent;boron from zero to about 0.2 percent; andbalance iron and incidental impurities;wherein the alloy has a total carbon and silicon content of 2.3 to 3.5 percent and a microstructure of interdendritic regions comprising eutectic reaction phases.2. The alloy according to claim 1 , wherein the carbon content of the alloy is from about 2.4 to about 3 weight percent and a total carbon and silicon content is 2.7 to 3.4 percent.3. The alloy according to claim 1 , wherein the alloy contains at least about 0.08 weight percent boron.4. The alloy according to claim 1 , wherein the alloy contains at least about 2.4 weight percent carbon claim 1 , at least about 0.08 weight percent boron and a total carbon and silicon content is 2.7 to 3.3 percent.5. The alloy according to claim 1 , wherein the cobalt content of the alloy ...

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Номер записи: 40
15-05-2014 дата публикации

Valve Stem Seal With Gas Relief Features

Номер: US20140130766A1
Автор: Sakata David
Принадлежит: FREUDENBERG-NOK GENERAL PARTNERSHIP

A valve stem seal can include an elastomeric component having a first portion for having a sealed engagement with a valve stem, and a pressure relief lip engaging a valve guide. The pressure relief lip can have a sealing configuration and a venting configuration. The venting configuration can allow excess exhaust gases to vent from a combustion chamber. After the venting of excess exhaust gases, the pressure relief lip can close to the sealing configuration to prevent oil from entering the combustion chamber. The elastomeric body or the valve guide can include a pressure relief channel. The elastomeric body can also include a bumper engaging the valve guide. The pressure relief channel can be disposed in the bumper. 1. A valve stem seal assembly for an internal combustion engine , the engine including a housing separating a lubrication chamber and a combustion chamber , the valve stem seal assembly comprising:a valve guide fixed in the housing and extending between the lubrication chamber and the combustion chamber, said valve guide including a pressure relief channel in a surface thereof;a valve stem extending through said valve guide between the lubrication chamber and the combustion chamber;an annular elastomeric body disposed around said valve stem, said elastomeric body including a seal portion adapted to have a sealed engagement with the valve stem and a pressure relief lip extending from said seal portion, said pressure relief lip having a sealing configuration and a venting configuration, said sealing configuration adapted to close a passageway in fluid communication with a combustion chamber of the engine to a lubrication chamber of the engine by engaging a surface of the valve guide, said venting configuration of the pressure relief lip opens the passageway to the lubrication chamber by lifting off of the surface of the valve guide; andan annular rigid body attached to said annular elastomeric body, said annular rigid body extending around said valve guide ...

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Номер записи: 41
21-02-2019 дата публикации

High Performance Iron-Based Alloys For Engine Valvetrain Applications And Methods of Making And Use Thereof

Номер: US20190055860A1
Автор: Doll David, Dooley Douglas, Qiao Cong Yue, Trudeau Todd
Принадлежит: L.E. Jones Company

An iron-based alloy includes, in weight percent, carbon from about 1 to about 2 percent; manganese from about 0.1 to about 1 percent; silicon from about 0.1 to about 2.5 percent; chromium from about 11 to about 19 percent; nickel up to about 8 percent; vanadium from about 0.8 to about 5 percent; molybdenum from about 11 to about 19 percent; tungsten up to about 0.5 percent; niobium from about 1 to about 4 percent; cobalt up to about 5.5 percent; boron up to about 0.5 percent; nitrogen up to about 0.5 percent, copper up to about 1.5 percent, sulfur up to about 0.3 percent, phosphorus up to about 0.3 percent, up to about 5 percent total of tantalum, titanium, hafnium and zirconium; iron from about 50 to about 70 percent; and incidental impurities. The alloy is suitable for use in elevated temperature applications such as in valve seat inserts for combustion engines. 1. An iron-based alloy comprising , in weight percent:carbon from about 1 to about 2 percent;manganese from about 0.1 to about 1 percent;silicon from about 0.1 to about 2.5 percent;chromium from about 11 to about 19 percent;nickel up to about 8 percent;vanadium from about 0.8 to about 5 percent;molybdenum from about 11 to about 19 percent;tungsten up to about 0.5 percent;niobium from about 1 to about 4 percent;cobalt up to about 5.5 percent;boron up to about 0.5 percent;nitrogen up to about 0.5 percent;copper up to about 1.5 percent;sulfur up to about 0.3 percent;phosphorus up to about 0.3 percent;up to about 5 percent total of tantalum, titanium, hafnium and zirconium;iron from about 50 to about 70 percent; andincidental impurities.2. The alloy according to claim 1 , wherein the alloy comprises:carbon from about 1.1 to about 1.8 percent;manganese from about 0.2 to about 0.8 percent;silicon from about 0.5 to about 1.5 percent;chromium from about 11.5 to about 18.5 percent;nickel from about 1 to about 3 percent;vanadium from about 1 to about 4.5 percent;molybdenum from about 11.5 to about 18.5 percent; ...

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Номер записи: 42
20-02-2020 дата публикации

Self-contained e-foot

Номер: US20200056512A1
Автор: Matthew A. VANCE
Принадлежит: Eaton Intelligent Power Ltd

A rocker arm, comprises a first outer arm and a second outer. A pivot body is joined between the first end of the first outer arm and the third end of the second outer arm. An actuatable latch mechanism is within the pivot body. An inner arm assembly comprises a latch arm pivotable adjacent the pivot body. An axle joins the inner arm assembly to pivot between the first outer arm and the second outer arm. An outer arm connector spans between the second end of the first outer arm and the fourth end of the second outer arm. A valve seat insert is constrained within the inner arm assembly between the outer arm connector and the axle. Alternatively, a valve seat insert hangs from the axle and is constrained within the inner arm assembly, the valve seat insert comprising a front and a rear cusp.

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Номер записи: 43
17-03-2022 дата публикации

CYLINDER HEAD VALVE SEAT WITH HIGH THERMAL CONDUCTIVITY AND MULTIPLE MATERIAL CROSS-SECTION

Номер: US20220082035A1
Автор: Doty Herbert W., Gerard Dale A., HARRIS Jeffrey, Hess Devin R., Wang Qigui
Принадлежит:

A cylinder head valve seat of an automobile vehicle includes a valve seat having a valve seat surface integrally joined to an engagement end. The engagement end includes multiple materials extending through a cross section of the engagement end. The multiple materials include: a first material having a first thermal conductivity; and a second material having a second thermal conductivity higher than the thermal conductivity of the first material, wherein the first material transitions into the second material. 1. A cylinder head valve seat of an automobile vehicle , comprising:a valve seat having a valve seat surface integrally joined to an engagement end; andthe engagement end including multiple materials extending through a cross section of the engagement end.2. The cylinder head valve seat of the automobile vehicle of claim 1 , wherein the multiple materials include at least two materials having differences in thermal conductivity.3. The cylinder head valve seat of the automobile vehicle of claim 2 , wherein the multiple materials include a first material having a copper content defining a high thermal conductivity.4. The cylinder head valve seat of the automobile vehicle of claim 3 , wherein the copper content of the first material has a low copper content claim 3 , defining a copper content less than approximately 50%.5. The cylinder head valve seat of the automobile vehicle of claim 4 , wherein the multiple materials include a second material having a high copper content defining a copper content greater than or equal to 90% claim 4 , and wherein the first material transitions into the second material.6. The cylinder head valve seat of the automobile vehicle of claim 2 , wherein the multiple materials include a first material defining silver having a first thermal conductivity and a second material defining silver having a second thermal conductivity higher than the first thermal conductivity.7. The cylinder head valve seat of the automobile vehicle of claim 1 ...

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Номер записи: 44
17-03-2022 дата публикации

Liquid-cooled cylinder head

Номер: US20220082062A1
Автор: Andreas Zurk, Martin Klampfer
Принадлежит: AVL List GmbH

Various embodiments of the present disclosure are directed to liquid-cooled cylinder heads. In one example embodiment, a cylinder head is disclosed including a component which extends into a combustion chamber, an upper cooling jacked, a lower cooling jacket, a plurality of valves arranged around the component, a plurality of cylinder head screws, an oil deck, a fire deck, a plurality of valve guides, and a fixed connection. The fixed connection is arranged from each valve guide to the component, and is a ring having at least one support. The support and the ring extend at least from the oil deck to the fire deck thereby hounding the combustion chamber, and the component is connected to the plurality of cylinder head screws.

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Номер записи: 45
28-02-2019 дата публикации

VALVE FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20190063271A1
Автор: Schlee Dimitri
Принадлежит:

The present disclosure relates to a valve, preferably an exhaust gas or gas exchange valve, having a valve head which has a front face and a rear face, the front face of the valve head including an edge region and a bulge towards the outside which has a crest region. The valve, in order to reduce the mass of the bulge of the valve head, including a laterally outer part section of the edge region that is of flatter configuration in comparison with a laterally inner part section of the edge region, or the edge region includes at least one discontinuity in cross section. 1. A valve comprising:a valve head which has a front face and a rear face, the front face of the valve head including an edge region and a bulge which has a crest region, wherein in order to reduce the mass of the bulge of the valve head, a laterally outer part section of the edge region is of flatter configuration in comparison with a laterally inner part section of the edge region, or the edge region includes at least one discontinuity in cross section.2. The valve according to claim 1 , wherein the valve is an exhaust gas or gas exchange valve.3. The valve according to claim 1 , wherein the at least one discontinuity includes at least one vertex claim 1 , inflection point or reversal point.4. The valve according to claim 1 , wherein claim 1 , in cross section claim 1 , the at least one discontinuity is arranged on the outside relative to a laterally inner end of the edge region or is arranged on the inside relative to a laterally outer end of the edge region.5. The valve according to claim 4 , wherein the inner lateral end adjoins the crest region or the outer lateral end is the outermost lateral end of the front face.6. The valve according to claim 1 , wherein the outer part section of the edge region has a lower slope in comparison with the inner part section of the edge region claim 1 , or the outer part section of the edge region has a slope in a range of less than ±5°.7. The valve according to ...

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Номер записи: 46
28-02-2019 дата публикации

Crankless engine

Номер: US20190063399A1
Автор: Doud John Galveston
Принадлежит:

The crankless sinusoidal engine has at least one cylinder, one standard piston and head with combustion chamber and inlet and exhaust valves. A main shaft with one flywheel with incorporated sinusoidal track, Connection between the piston and the sinusoidal track consists of four items; to wit, one connecting rod, one bearing trolley and two segmented rollers, said rollers being in constant contact with said sinusoidal track, one bearing on each side thereof. The bearing trolley sliding on guide pins anchored in opposite ends of cast (alternatively fabricated) housing, said guide pins positioned parallel to the main shaft. 1. A crankless sinusoidal engine comprising at least one cylinder , complete with head and inlet and exhaust poppet valves. A main shaft mounted parallel to the cylinder , one flywheel with incorporated sinusoidal track , mounted near the center of the main shaft , one connecting rod attached to the piston at one end and to a bearing trolley at the other by means of a wrist pin , said bearing trolley having two segmented rollers spaced so as to fit snugly , one against each side of the sinusoidal track. The bearing trolley is mounted on two guide pins so that it will slide parallel to the main shaft and cylinder. The guide pins are rigidly mounted in and between the front and back ends of the housing. Force from the piston through the connecting rod , bearing trolley , and segmented bearings against the sinusoidal track cause the track , flywheel , and main shaft to rotate , all enclosed in a housing.2. A crankless sinusoidal engine as claimed in claim 1 , characterized in that it comprises one or more cylinders located around the main shaft.3. A crankless sinusoidal engine as claimed in claim 1 , characterized in that the driving mechanism comprises a segmented roller constantly in contact with one cam surface and a second segmented roller in constant contact with the opposed cam surface.4. A crankless sinusoidal engine as claimed in claim 1 , ...

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Номер записи: 47
08-03-2018 дата публикации

COBALT-BASED CLADDING ALLOY FOR ENGINE VALVE AND ENGINE

Номер: US20180066342A1
Автор: Ando Kimihiko, KAMO Yuki, SHINOHARA Nobuyuki
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A cobalt-based cladding alloy for an engine valve includes, by mass %: Cr: 13% to 35%; Mo: 5% to 30%; Si: 0.1% to 3.0%; C: 0.04% or less; Ni: 15% or less; W: 9% or less; Fe: 30% or less; Mn: 3% or less; S: 0.4% or less; and Co and inevitable impurity elements as a remainder. The amount of Co is 30% or more. 1. A cobalt-based cladding alloy for an engine valve comprising , by mass %:Cr: 13% to 35%;Mo: 5% to 30%;Si: 0.1% to 3.0%;C: 0.04% or less;Ni: 15% or less;W: 9% or less;Fe: 30% or less;Mn: 3% or less;S: 0.4% or less; andCo and inevitable impurity elements as a remainder,wherein an amount of Co is 30% or more.2. An engine comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'an engine valve on which a cladding material made of the cobalt-based cladding alloy according to is deposited,'}wherein a fuel for the engine is any one of ethanol, ethanol-blended gasoline, compressed natural gas, and liquefied petroleum gas. The disclosure of Japanese Patent Application No. 2016-175665 filed on Sep. 8, 2016 including the specification, drawings and abstract is incorporated herein by reference in its entirety.The present disclosure relates to a cobalt-based cladding alloy for an engine valve, and an engine provided with an engine valve on which a cladding material made of the cobalt-based cladding alloy is deposited.A cobalt-based cladding alloy excellent in corrosion resistance and wear resistance is employed by a valve face of an engine valve.For example, Japanese Patent Application Publication No. 5-84592 (JP 5-84592 A) discloses a cobalt-based cladding alloy consisting of, by parts by weight, Cr: 10% to 40%, Mo: more than 10% to 30%, W: 1% to 20%, Si: 0.5% to 5%, C: 0.05% to 3%, Al: 0.001% to 0.12%, 0: 0.001% to 0.1%, Fe: 30% or less, Ni: 20% or less, Mn: 3% or less, and Co and inevitable impurity elements as the remainder (here, the amount of Co is 30 wt % to 70 wt %).According to the cobalt-based cladding alloy described in JP 5-84592 A, since Fe is contained ...

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Номер записи: 48
19-03-2015 дата публикации

INTERNAL COMBUSTION ENGINE AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE

Номер: US20150075489A1
Автор: Puetzer Jean-Philippe
Принадлежит:

An intake system for an internal combustion engine is provided. The intake system may include an intake manifold fluidly connected to a cylinder, an intake valve coupled to the cylinder having an air supply duct longitudinally extending through a portion of a valve stem and having an outlet opening into the intake manifold and an inlet fluidly connected to a supply line fluidly connected to an intake passage downstream of a compressor and upstream of a throttle, and a shut-off valve positioned in the supply line configured to adjust the flow of gas through the supply line. 1. An internal combustion engine comprising:at least one cylinder head; and where each lifting valve has a valve stem, on whose end facing toward the cylinder there is arranged a valve head corresponding to the inlet opening and whose other end faces toward the valve actuating device and which is mounted so as to be displaceable in translational fashion in a bushing-like valve stem guide such that the valve, when actuated and during rotation of the camshaft, performs an oscillating lifting movement in the direction of its longitudinal axis between a valve closed position and a valve open position so as to open up and close off the inlet opening; and', 'where in the valve stem of at least one valve, there is provided an air supply duct which extends in a main section along the longitudinal axis of the valve, wherein, at a cylinder-side end of the air supply duct, at least one rectilinear section of the air supply duct branches off and emerges from the valve, and the air supply duct is, toward an end facing away from the cylinder, fluidly connected to the intake system via a line., 'at least one cylinder which has at least one inlet opening fluidly connected to an intake system configured to generate charge air, and a valve assembly comprising a lifting valve for each inlet opening and comprising a valve actuating device for actuating the at least one lifting valve, which valve actuating device ...

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Номер записи: 49
07-03-2019 дата публикации

VALVE SHIELD FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20190072013A1
Автор: Wicks Christopher Donald
Принадлежит:

An engine is provided with a cylinder head defining a lubrication gallery intersecting a valve guide bore wall, and a valve guide. The valve guide has inner and outer walls intersecting valve-side and port-side ends. The inner wall defines a channel extending from an intermediate region of the guide to the valve-side end. The guide defines a passage extending outwardly from the channel at the intermediate region to the outer wall, with the passage fluidly connected to the gallery. Pressurized lubricant is provided to a lubrication gallery intersecting a valve guide bore wall of the cylinder head. Lubricant is directed from the gallery into a passage extending through an intermediate region of a valve guide. A moving valve stem positioned within the guide is lubricated by flowing lubricant from the passage into a channel intersecting the inner wall of the guide and to a valve end of the guide. 1. An engine comprising:a cylinder head defining a lubrication gallery intersecting a valve guide bore wall; anda valve guide having inner and outer walls intersecting valve-side and port-side ends, the inner wall defining a channel extending from an intermediate region of the guide to the valve-side end, the guide defining a passage extending outwardly from the channel at the intermediate region to the outer wall, the passage fluidly connected to the gallery.2. The engine of wherein the valve guide bore wall of the head further defines a circumferential groove intersecting the lubrication gallery.3. The engine of wherein the passage of the guide at the outer wall overlaps with the circumferential groove of the valve guide bore wall.4. The engine of wherein the outer wall of the valve guide further defines a circumferential groove at the intermediate region claim 1 , the circumferential groove intersecting the passage claim 1 , the circumferential groove of the guide overlapped with the lubrication gallery.5. The engine of further comprising a pump fluidly connected to the ...

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Номер записи: 50
24-03-2022 дата публикации

METHOD FOR INTRODUCING HIGHLY PRECOMPRESSED COMBUSTION AIR INTO A COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE, HIGH-PRESSURE INLET VALVE THEREFOR AND INTERNAL COMBUSTION ENGINE HAVING SUCH A HIGH-PRESSURE INLET VALVE

Номер: US20220090522A1
Автор: Junker Erwin
Принадлежит:

A method for introducing combustion air into a cylinder () of an internal combustion engine, a high-pressure inlet valve () provided therefor and an internal combustion engine that operates using the method and the high-pressure inlet valve are described. All the combustion air for the respective cylinders () is introduced into the cylinder () of the internal combustion engine, by means of a high-pressure inlet valve () arranged in the relevant cylinder head () and on the basis of a controlled mass flow, such that mixture formation and charge exchange are intensified. In addition, the temperature and/or pressure of the combustion air is measured and the quantity of combustion air is introduced into the cylinder (), in a controlled manner and on the basis of the measurement results, by means of the high-pressure inlet valve () by opening or closing a sliding piston () of the high-pressure inlet valve () by displacement. As a result of an axial displacement of the sliding piston () between guide sections () in the housing () of the high-pressure inlet valve (), passage areas () for combustion air are blocked in a closed position () and opened in an open position (). In the passage area (), the sliding piston () has two pressurization areas () facing each other, the surfaces of which are of equal size or differ from each other when projected in one plane. The first pressurization area () can be designed as a poppet valve () and the second pressurization area () can be designed as an annular surface (). The internal combustion engine has a high-pressure line () for the combustion air, which line is connected to the high-pressure inlet valve (). With respect to the longitudinal axis of the cylinder (), the high-pressure inlet valve () is arranged in the cylinder head () in an upright or horizontal position. 1. A method for introducing combustion air into a cylinder of an internal combustion engine , in which method the entirety of the combustion air for the respective ...

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Номер записи: 51
18-03-2021 дата публикации

COPPER ALLOY COMPOSITIONS HAVING ENHANCED THERMAL CONDUCTIVITY AND WEAR RESISTANCE

Номер: US20210078073A1
Автор: Grensing Fritz C., KRUS David J., MACK Steffen, TRYBUS Carole L.
Принадлежит: MATERION CORPORATION

The present disclosure relates to powders and wires made from a copper-containing alloy. The copper-containing alloy is a copper-nickel-tin alloy or a copper-nickel-silicon-chromium alloy. Articles formed from the metal powder exhibit high thermal conductivity, high wear resistance, and thermal stability. The powders and wire also be used as a feed material for thermal spraying and copper-containing coatings are disclosed. The copper-containing alloy material promotes increased life of engine components and fuel efficiency when used as a cylindrical liner in an internal combustion engine. 1. A composition comprising a copper-containing alloy , wherein the copper-containing alloy comprises copper , nickel , and either (i) tin or (ii) silicon and chromium , and wherein the alloy is in the form of a particulate or a wire.2. The composition of claim 1 , wherein the copper-containing alloy is a copper-nickel-silicon-chromium alloy that contains:about 5 wt % to about 9 wt % nickel;about 1 wt % to about 3 wt % silicon;about 0.2 wt % to about 2.0 wt % chromium; andbalance copper.3. The composition of claim 1 , wherein the copper-containing alloy is a copper-nickel-tin alloy that contains:about 5 wt % to about 20 wt % nickel;about 5 wt % to about 10 wt % tin; and,balance copper.4. The composition of claim 1 , wherein the copper-containing alloy is a particulate having an average particle size from about 2 micrometers to about 500 micrometers.5. The composition of claim 1 , further comprising a lubricant.6. The composition of claim 5 , wherein the lubricant comprises graphite claim 5 , talc claim 5 , MoS claim 5 , mica claim 5 , or boron nitride.7. An article formed by sintering a copper-containing alloy particulate composition claim 5 , wherein the copper-containing alloy comprises copper claim 5 , nickel claim 5 , and either (i) tin or (ii) silicon and chromium.8. The article of claim 7 , wherein the copper-containing alloy is a copper-nickel-silicon-chromium alloy that ...

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Номер записи: 52
25-03-2021 дата публикации

ROCKER ARM WITH INBOARD LOST MOTION SPRING OVER VALVE

Номер: US20210087953A1
Автор: Vance Matthew A.
Принадлежит: Eaton Intelligent Power Limited

A rocker arm can comprise a first outer arm and a second outer arm joined by a pivot body. An actuatable latch mechanism is within the pivot body. An inner arm assembly comprises a latch arm. A first spring prop is on the inner arm assembly distal from the latch arm. An axle joins the inner arm assembly to pivot between the first outer arm and the second outer arm. A spring is biased against the first outer arm and against the first spring prop. The first spring prop can comprise a hooked end. Or, the first spring prop can extend laterally out from the rocker arm and parallel to the axle. The spring can comprise a one-piece spring comprising first and second coil springs connected by a lateral connector. Or, two separate torsion springs can comprising tangential spring ends extending at approximately 90 degrees. 125-. (canceled)26. A rocker arm , comprising:a first outer arm and a second outer arm joined by a pivot body on a first end of the rocker arm and comprising a valve seat on a second end of the rocker arm;a latch mechanism configured to actuate from the pivot body;an inner arm assembly between the first outer arm and the second outer arm;an axle mounted on the second end of the rocker arm, the axle forming a pivot location for the inner arm assembly relative to the first outer arm and the second outer arm; anda lost motion spring around the axle, the lost motion spring biased against the inner arm assembly and biased against the second end.27. The rocker arm of claim 26 , further comprising a spring prop within the inner arm assembly claim 26 , wherein the lost motion spring is biased against the spring prop.28. The rocker arm of claim 27 , wherein the spring prop is biased against the valve seat.29. The rocker arm of claim 27 , wherein the inner arm assembly comprises a first inner arm and a second inner arm claim 27 , and wherein the spring prop extends from the first inner arm.30. The rocker arm of claim 27 , wherein the inner arm assembly comprises a ...

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Номер записи: 53
31-03-2016 дата публикации

Low-Cost, High-Strength Fe-Ni-Cr Alloys for High Temperature Exhaust Valve Applications

Номер: US20160090878A1
Автор: MURALIDHARAN Govindarajan
Принадлежит:

An Fe—Ni—Cr alloy is composed essentially of, in terms of wt. %: 2.4 to 3.7 Al, up to 1.05 Co, 14.8 to 15.9 Cr, 25 to 36 Fe, up to 1.2 Hf, up to 4 Mn, up to 0.6 Mo, up to 2.2 Nb, up to 1.05 Ta, 1.9 to 3.6 Ti, up to 0.08 W, up to 0.03 Zr, 0.18 to 0.27 C, up to 0.0015 N, balance Ni, wherein, in terms of atomic percent: 8.5≦Al+Ti+Zr+Hf+Ta≦11.5, 0.53≦Al÷(Al+Ti+Zr+Hf+Ta)≦0.65, and 0.16≦Cr÷(Fe+Ni+Cr+Mn)≦0.21, the alloy being essentially free of Cu, Si, and V. 2. An alloy in accordance with wherein the range of Al is 2.5 to 3.56 weight percent.3. An alloy in accordance with wherein the range of Co is up to 1.01 weight percent.4. An alloy in accordance with wherein the range of Cr is 14.93 to 15.76 weight percent.5. An alloy in accordance with wherein the range of Fe is 25.87 to 35 weight percent.6. An alloy in accordance with wherein the range of Hf is up to 1 weight percent.7. An alloy in accordance with wherein the range of Mn is up to 3.38 weight percent.8. An alloy in accordance with wherein the range of Mo is up to 0.52 weight percent.9. An alloy in accordance with wherein the range of Nb is up to 2 weight percent.10. An alloy in accordance with wherein the range of Ta is up to 1.02 weight percent.11. An alloy in accordance with wherein the range of Ti is 2 to 3.49 weight percent.12. An alloy in accordance with wherein the range of W is up to 0.06 weight percent.13. An alloy in accordance with wherein the range of Zr is up to 0.02 weight percent.14. An alloy in accordance with wherein the range of C is 0.18 to 0.24 weight percent.15. An alloy in accordance with wherein claim 1 , in terms of atomic percent claim 1 , 8.7≦Al+Ti+Zr+Hf+Ta≦11.48.16. An alloy in accordance with wherein claim 15 , in terms of atomic percent claim 15 , 9≦Al+Ti+Zr+Hf+Ta≦11.45.17. An alloy in accordance with wherein claim 1 , in terms of atomic percent claim 1 , 0.54≦Al÷(Al+Ti+Zr+Hf+Ta)≦0.64.18. An alloy in accordance with wherein claim 17 , in terms of atomic percent claim 17 , 0.55≦Al÷(Al+Ti+ ...

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Номер записи: 54
21-03-2019 дата публикации

VALVE ARRANGEMENT

Номер: US20190085792A1
Автор: Langervik Lennart, Svensson Stig Arne
Принадлежит: VOLVO TRUCK CORPORATION

A valve arrangement for supplying air to a combustion chamber of an internal combustion engine includes a first valve, the first valve including a first valve head, a first valve stem assembly and an internal cavity, which is at least partly located in the first valve stem assembly, and a second valve partly arranged within the internal cavity of the first valve, the second valve including a second valve head and a second valve stem assembly, and being movable within the internal cavity between an upper, closed position and a lower, open position, wherein a junction seal extends over a junction between the first valve stem assembly and the second valve stem assembly when the second valve is in the closed position. A leakage preventing arrangement is arranged to hinder leakage of liquid from the outside of the junction seal from reaching in between the first valve stem assembly and the second salve stem assembly. 1. A valve arrangement for supplying air to a combustion chamber of an internal combustion engine , the valve arrangement comprisinga first valve, the first valve comprising a first valve head, a first valve stem assembly and an internal cavity, which is at least partly located in the first valve stem assembly, the first valve being movable between an upper, closed position of the valve, and a lower, open position, in which open position air may be supplied to the combustion chamber past the first valve head,a second valve partly arranged within the internal cavity of the first valve, the second valve comprising a second valve head and a second valve stem assembly, and being movable within the internal cavity between an upper, closed position, in which closed position the second valve head is in contact with an inner surface of the first valve head, and a lower, open position in which open position additional air may be supplied to the combustion chamber via the internal cavity past the second valve head,a stem joining device extending between the first ...

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Номер записи: 55
30-03-2017 дата публикации

Valve actuation system

Номер: US20170089223A1
Автор: Ashwin A. Hattiangadi, Gopinath BASKARAN, Indrajith Kizhakkethara, Kevin W. Redinbo, Rong Qu
Принадлежит: Caterpillar Inc

A valve actuation system is disclosed for use with an internal combustion engine. The valve actuation system may have a rocker shaft, a rocker arm pivotally mounted on the rocker shaft, at least one cam follower and a pushrod connecting the at least one cam follower to the rocker arm. The valve actuation system may also have a plurality of gas exchange valves, and a bridge connecting the rocker arm to the valves. The valve actuation system may further have at least one spring disposed around each of the valves and configured to bias each of the valves toward closed positions, and a rotocoil configured to rotatably connect the at least one spring to each of the valves. The rotocoil may have an internal chamfer at a bridge end with an angle of about 26-28°. The at least one spring may have an assembled load of about 750-850 N.

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Номер записи: 56
30-03-2017 дата публикации

VALVE SEAT OF SINTERED IRON-BASED ALLOY

Номер: US20170089228A1
Автор: HENMI Hiroji, SHIMADA Akiko
Принадлежит: Kabushiki Kaisha Riken

The present invention provides a valve seat of a Co-free, sintered iron-based alloy having excellent heat resistance, oxidation resistance and wear resistance, as well as excellent machinability, which is usable for internal combustion engines using a gas fuel. The valve seat is produced by using a prealloy containing 12% or more by mass of Cr in a matrix for, and hard particles having high strength and hardness at high temperatures are used, such that the entire valve seat has a composition comprising by mass 5.0-20.0% of Cr, 0.4-2.0% of Si, 2.0-6.0% of Ni, 5.0-25.0% of Mo, 0.1-5.0% of W, 0.5-5.0% of V, 1.0% or less of Nb, and 0.5-1.5% of C, the balance being Fe and inevitable impurities. 1. A valve seat of a sintered iron-based alloy having hard particles dispersed in a matrix , said valve seat having a composition comprising as a whole by mass 5.0-20.0% of Cr , 0.4-2.0% of Si , 2.0-6.0% of Ni , 5.0-25.0% of Mo , 0.1-5.0% of W , 0.5-5.0% of V , 1.0% or less of Nb , and 0.5-1.5% of C , the balance being Fe and inevitable impurities.2. The valve seat of a sintered iron-based alloy according to claim 1 , wherein said hard particles are Fe—Mo—Si alloy particles comprising by mass 40.0-70.0% of Mo claim 1 , 0.4-2.0% of Si claim 1 , and 0.1% or less of C claim 1 , the balance being Fe and inevitable impurities.3. The valve seat of a sintered iron-based alloy according to claim 1 , whose sliding surface has a Cr oxide film.4. The valve seat of a sintered iron-based alloy according to claim 1 , wherein said matrix comprises a martensite or sorbite phase.5. The valve seat of a sintered iron-based alloy according to claim 1 , wherein said matrix contains secondary carbides of one or more of Cr claim 1 , Mo claim 1 , W claim 1 , V claim 1 , Nb and Fe.6. The valve seat of a sintered iron-based alloy according to claim 1 , in which 0.5-3% by mass of MnS particles are dispersed.7. A method for producing the valve seat of a sintered iron-based alloy according to claim 1 , ...

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Номер записи: 57
30-03-2017 дата публикации

System for engine valve actuation comprising lash-prevention valve actuation motion

Номер: US20170089232A1
Автор: DONG Yang, Justin D. Baltrucki, Peter JO
Принадлежит: Jacobs Vehicle Systems Inc

A system for actuating engine valve comprises a main valve actuation motion source configured to supply main valve actuation motions to the at least one engine valve via a main motion load path, and an auxiliary valve actuation motion source separate from the main valve actuation motion source and configured to supply complementary auxiliary valve actuation motions to the at least one engine valve via an auxiliary motion load path. A lost motion component is configured, in one state, to maintain lash between the auxiliary valve actuation motion source and the auxiliary motion load path or within the auxiliary motion load path and, in another state, to take up this lash. The auxiliary valve actuation motion source is further configured to supply at least one lash-prevention valve actuation motion that substantially matches at least one of the main valve actuation motions.

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Номер записи: 58
30-03-2017 дата публикации

Method and apparatus for reducing emissions and/or reducing friction in an internal combustion engine

Номер: US20170089241A1
Автор: James P. Golding, Shawn E. Dolan
Принадлежит: Henkel AG and Co KGaA

A method and apparatus for reducing at least one of HC, CO, and NO x , emissions from an operating internal combustion engine fueled by hydrocarbon or similar fuels, such as alcohols, wherein a portion of the internal combustion chamber has aluminum and/or titanium containing surfaces coated with a titanium dioxide coating further comprising a dopant in and/or on the adherent titanium dioxide coating.

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Номер записи: 59
07-04-2016 дата публикации

Nitrided Engine Valve with HVOF Coating

Номер: US20160097459A1
Автор: Daniel Sordelet, Mark Veliz
Принадлежит: Caterpillar Inc

A valve for use in an internal combustion engine is disclosed. The valve includes a stem connected to a fillet disposed between the stem and a seat face. A thermal spray technique, such as a high velocity oxy fuel coating spray (HVOF) is applied to the seat face. A nitriding treatment that includes a nitrogen source, which may or may not contain carbon, and heat may be applied after the HVOF spray. The heat allows the nitrogen and/or carbon to penetrate the HVOF layer and the seat face to form a compound zone. The compound zone enhances the wear resistance of the surface during engine operation.

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Номер записи: 60
01-04-2021 дата публикации

ROCKER ARM MOTION DETECTION FOR DIAGNOSTIC FEEDBACK AND CONTROL

Номер: US20210095580A1
Автор: Liskar Petr
Принадлежит:

A method of operating an internal combustion engine having an electrical circuit that includes a connection closed by abutment between two distinct parts, one of which is mounted to a rocker arm of a rocker arm assembly and another that is mounted to a part distinct from the rocker arm. The connection is structured such that the movement of the rocker arm causes relative motion between the surfaces of the distinct parts that close the connection. The relative motion causes the circuit resistance to transition between values within a first range and values within a second range. The transitions of resistance between those ranges are detected and their presence, absence, or timing used for purposes of providing diagnostic feedback or control. 1. A method of operating an internal combustion engine of a type that has a combustion chamber , a moveable valve having a seat formed in the combustion chamber , a camshaft , and a rocker arm assembly that actuates the valve and includes a rocker arm and a cam follower configured to engage a cam mounted on a camshaft as the camshaft rotates , the method comprising:providing an electrical circuit having a resistance and comprising an electrical connection made by abutment between surfaces of two distinct parts, one of which is mounted to the rocker arm;over an interval, determining times at which the resistance transitions between a value within a first range to a value within a second range, wherein the second range is disjoint from the first range; andperforming a diagnostic or control operation based on the times or the absence of any times.2. The method of claim 1 , comprising using the timing of at least one of the transitions in the diagnostic or control operation.3. The method of claim 2 , further comprising:determining a first time and a second time at which the resistance transitions between a value within the first range and a value within the second range;wherein the diagnostic or control operation is performed based ...

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Номер записи: 61
01-04-2021 дата публикации

SEALING DEVICE AND MANUFACTURING METHOD THEREFOR

Номер: US20210095581A1
Автор: KISHIRO Masamichi, NISHIMURA Nobuhiro
Принадлежит: NOK CORPORATION

A sealing device seals a rod having a cylindrical part and a cylindrical guide that guides reciprocation of the rod in an axial direction of the rod. The sealing device includes an elastic ring formed of an elastic material, and a rigid ring formed of a rigid material fixed to the elastic ring for reinforcing the elastic ring. The elastic ring includes a lip with which an outer peripheral surface of the rod is in slidable contact. The rigid ring includes a rigid-ring cylindrical part located radially outside an end portion of the guide. The rigid-ring cylindrical part includes multiple hook hasps engaged into at least one recess formed on an outer peripheral surface of the guide. Each of the multiple hook hasps includes a root portion and a distal end portion located radially inward of the root portion and fitted into the recess. A thin portion is formed at the root portion of the hook hasp, the thin portion being thinner than other parts of the hook hasp. 1. A sealing device for sealing a rod having a cylindrical part and a cylindrical guide that guides reciprocation of the rod in an axial direction of the rod , comprising:an elastic ring formed of an elastic material; anda rigid ring formed of a rigid material fixed to the elastic ring for reinforcing the elastic ring,the elastic ring comprising a lip with which an outer peripheral surface of the rod is in slidable contact,the rigid ring comprising a rigid-ring cylindrical part located radially outside an end portion of the guide,the rigid-ring cylindrical part comprising multiple hook hasps engaged into at least one recess formed on an outer peripheral surface of the guide,each of the multiple hook hasps comprising a root portion and a distal end portion located radially inward of the root portion and fitted into the recess,a thin portion being formed at the root portion of the hook hasp, the thin portion being thinner than other parts of the hook hasp.2. The sealing device according to claim 1 , wherein the thin ...

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Номер записи: 62
14-04-2016 дата публикации

Alloy powder for overlay welding, and weld overlay alloy member and engine valve obtained using the same

Номер: US20160102387A1
Автор: Kimihiko Ando, Nobuyuki Shinohara
Принадлежит: Toyota Motor Corp

According the present invention, an alloy powder for overlay welding that prevents generation of gas defects in a weld overlay alloy in order to improve the toughness and wear resistance of the weld overlay alloy is provided. The alloy powder is an alloy powder for overlay welding on a steel surface containing nitrogen, which is characterized in that it contains 30% to 45% by mass of Mo, 10% to 30% by mass of Ni, 0.2% to 0.6% by mass of C, and 0.30% to 2.0% by mass of Al, with the balance made up of incidental impurities and Co.

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Номер записи: 63
13-04-2017 дата публикации

ENGINE CONFIGURATION HAVING VARIOUS DISPLACEMENTS

Номер: US20170101929A1
Автор: Jones John Peter
Принадлежит: Cummins Inc.

Various embodiments provide a method of varying engine displacement. The method includes determining a change in a stroke distance of the engine required to obtain a pre-determined volumetric change in a displacement of the engine. The method includes machining a top surface of a crankcase so as to remove a height of material from the crankcase. The height is calculated to correspond to the change in the stroke of the engine required to obtain the volumetric change in the displacement of the engine. The method also includes coupling the crankcase to an engine block portion of the engine. 1. A method of varying a displacement of an engine comprising:determining a change in a stroke distance within each of a quantity of cylinders, the change in the stroke distance of the engine required to obtain a pre-determined volumetric change in a displacement of the engine;machining a top surface of a crankcase so as to remove a height of material from the crankcase, the height of material calculated to correspond to the change in the stroke distance of the engine required to obtain the volumetric change in the displacement of the engine; andcoupling the top surface of the crankcase to a mating surface of an engine block portion of the engine.2. The method of claim 1 , wherein the engine block portion is integrally formed with a cylinder head portion.3. The method of claim 2 , further comprising installing a crankshaft in the crankcase claim 2 , the crankshaft being selected to accommodate the height of material removed.3. The method of claim 3 , wherein the crankshaft is selected to decrease the stroke distance.4. The method of claim 2 , further comprising coupling a valve cartridge assembly to the cylinder head portion of the engine block portion at a cartridge slot claim 2 , the valve cartridge assembly comprising:a cartridge housing including a port and a valve seat defining a valve seat opening;a valve coupled to the cartridge housing and positioned, in part in the ...

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Номер записи: 64
19-04-2018 дата публикации

INTAKE VALVE FAIRING FOR A CYLINDER HEAD OF AN ENGINE

Номер: US20180106214A1
Автор: Cierpial Philip Damian, Fluharty Jeffrey D., Riegger John Christopher, Vempati Abhijyoth
Принадлежит:

An engine has a cylinder head defining an intake port with a roof defining first and second valve guide bores upstream of first and second siamesed intake valve seats for a cylinder. The head has first and second asymmetric fairings extending outwardly from the roof and positioned directly upstream of respective bores. Each fairing has an inner wall intersecting an outer wall along an upstream edge and an inclined planar roof wall extending between the inner and outer walls. A method of forming the cylinder head and engine is also provided by milling the fairings from a roof preform formed with the intake port of the head. 1. An engine comprising:a head defining an intake port with a roof defining first and second valve guide bores upstream of first and second siamesed intake valve seats for a cylinder;first and second fairings extending outwardly from the roof and positioned directly upstream of respective bores, each fairing having an inner wall intersecting an outer wall along an upstream edge and an inclined planar roof wall extending between the inner and outer walls.2. The engine of wherein a length of the inner wall is less than a length of the outer wall for each fairing; andwherein each fairing is asymmetric.3. The engine of wherein the inner walls of the first and second fairings face one another.4. The engine of wherein claim 1 , for each fairing claim 1 , the inner wall is oriented at a first angle relative to the surrounding roof and the outer wall is oriented at a second angle relative to the surrounding roof claim 1 , the first angle less than the second angle such that the inner wall is steeper than the outer wall.5. The engine of wherein the inner and outer walls of each fairing are planar claim 1 , and an angle formed between the inner and outer walls of each fairing is an acute angle.6. The engine of wherein the roof wall is inclined towards the associated upstream edge of the fairing.7. The engine of wherein the roof wall is inclined towards the ...

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Номер записи: 65
11-04-2019 дата публикации

METHOD FOR PRODUCING A VALVE SEAT RING BY POWDER METALLURGY

Номер: US20190105714A1
Автор: Heckendorn Heiko, Mueller Alexander, Scholl Roland, Wintrich Klaus
Принадлежит:

A method for producing a valve seat ring via powder metallurgy may include compacting a powder mixture including 4% by weight to 16% by weight particles of cobalt to form the valve seat ring. The method may also include sintering the powder mixture after compacting the powder mixture. Before compacting the powder mixture, 80% of the particles of cobalt may have a particle diameter of approximately 4.4 μm to 17.5 μm. 1. A method for producing a valve seat ring via powder metallurgy , comprising:compacting a powder mixture including 4% by weight to 16 % by weight particles of cobalt to form the valve seat ring; andsintering the powder mixture after compacting the powder mixture;wherein 80% of the particles of cobalt have, before compacting the powder mixture, a particle diameter of approximately 4.4 μm to 17.5 μm.2. The method according to claim 1 , further comprising forming 0% by weight to 40% by weight of a starting material by at least one hard phase based on one of iron claim 1 , cobalt and molybdenum claim 1 , wherein the at least one hard phase is included in the starting material as an admixture.3. The method according to claim 1 , further comprising forming 0% by weight to 3% by weight of a starting material by at least one solid lubricant claim 1 , wherein the at least one solid lubricant is included in the starting material as an admixture.4. The method according to claim 1 , further comprising forming 0% by weight to 5.5% by weight of a starting material respectively by an admixture of at least one of copper claim 1 , bronze claim 1 , brass claim 1 , ferro phosphorus and graphite.5. The method according to claim 1 , wherein a starting material includes 0% by weight to 7% by weight copper.6. The method according to claim 1 , further comprising forming 0% by weight to 5.5% by weight of a starting material respectively by at least one of a pressing agent and a flow improver.7. The method according to claim 1 , wherein a starting material includes an iron- ...

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Номер записи: 66
29-04-2021 дата публикации

Method and system for wear estimation

Номер: US20210123376A1
Автор: Jeffrey C. Krieger, Sravan K. Karri
Принадлежит: Caterpillar Inc

A method for estimating wear of at least one component of an internal combustion engine includes receiving sensor information and fuel commands indicative of an amount of fuel supplied to at least one combustion chamber of the internal combustion engine and determining an incremental increase in an amount of wear of at least one component of the internal combustion engine based on at least the sensor information and the fuel commands. The method also includes determining an updated amount of wear based on the incremental increase in the amount of wear, and outputting a notification indicative of the updated amount of wear.

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Номер записи: 67
02-04-2020 дата публикации

HIGH TEMPERATURE ALLOY FOR CASTING ENGINE VALVES

Номер: US20200102629A1
Автор: QIU Caian, VELIZ Mark D., YANIAK Thomas J.
Принадлежит: CATERPILLAR INC.

A high temperature alloy is disclosed. The high temperature alloy may have on a weight basis: about 9.0-10.0 weight % of Co, about 0.25 weight % maximum of Fe, about 8.0-9.0 weight % of Cr, about 4.75-5.50 weight % of Al, about 1.0-1.5 weight % of Ti, about 0-2.0 weight % of Mo, about 6.0-9.0 weight %, of W, about 0.12-0.18 weight % of C, about 0.01-0.03 weight % of Zr, about 0.005-0.015 weight % of B, about 0.5-1.5 weight % of Ta, a balance of Ni, and incidental impurities. 120-. (canceled)21. A high temperature alloy , comprising , on a weight basis:Co: 9.0-10.0 weight %,Cr: 8.0-9.0 weight %,Al: 4.75-5.50 weight %,Ti: 1.0-1.5 weight %,Mo: 0-2.0 weight %,W: 6.0-9.0 weight %,C: 0.12-0.18 weight %,Zr: 0.01-0.03 weight %,B: 0.005-0.015 weight %,Ta: 0.5-1.5 weight %, anda balance of Ni and incidental impurities.22. The high temperature alloy of claim 21 , wherein Cr is about 8.5 weight %.23. The high temperature alloy of claim 22 , wherein Mo is about 1.75 weight %.24. The high temperature alloy of claim 23 , wherein W is about 7.5 weight %.25. The high temperature alloy of claim 24 , wherein Ta is about 1.25 weight %.26. A high temperature alloy claim 24 , comprising claim 24 , on a weight basis:Co: 4.0-7.0 weight %,Cr: 15.0-17.0 weight %,Al: 4.75-5.50 weight %,Ti: 0.75-1.5 weight %,Mo: 0-2.0 weight %,Nb: 0-0.7 weight %,W: 1.0-3.0 weight %,C: 0.12-0.18 weight %,Zr: 0.01-0.03 weight %,B: 0.005-0.015 weight %,Ta: 0.5-1.5 weight %, anda balance of Ni and incidental impurities.27. The high temperature alloy of claim 26 , including claim 26 , on a weight basis:Co: about 7.0 weight %,Cr: about 16.0 weight %,Al: about 5.0 weight %,Ti: about 1.0 weight %,Mo: about 1.5 weight %,Nb: about 0.5 weight %,W: about 1.5 weight %,C: about 0.15 weight %,Zr: about 0.02 weight %,B: about 0.01 weight %,Ta: about 1.0 weight %, anda balance of Ni and incidental impurities.28. The high temperature alloy of claim 27 , wherein a solidification temperature range of the high temperature alloy is ...

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Номер записи: 68
28-04-2016 дата публикации

Detection apparatus for at least one of temperature and pressure in a cylinder of an internal combustion engine

Номер: US20160115830A1
Автор: Dale Arden Stretch, David Yee, Douglas J. Nielsen, Evan Grimm, James Edward Mccarthy, Jr., John Albert Kovacich, John Trublowski, Karen Evelyn Bevan, Martin Pryor, Xubin Song
Принадлежит: Eaton Corp

An apparatus for measuring at least one of temperature and pressure within a cylinder of an internal combustion engine can include an engine valve and a sensor. The internal combustion engine can include a valvetrain having rocker arm assembly, a camshaft, a valve, and a hydraulic lash adjuster. The engine valve can have a valve head and a valve stem extending from the valve head in an axial direction. The valve head can have a valve face configured to be in pressure communication with an engine cylinder. The valve stem can have an outer surface with a cylindrical portion and a variably-shaped portion. The variably-shaped portion can define a target detectable by the sensor and the sensor can be installed adjacent to the target. Alternatively, the sensor can be positioned to detect a level of force at some point along the valvetrain.

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Номер записи: 69
26-04-2018 дата публикации

GASKET FOR A VALVE OF AN INTERNAL COMBUSTION ENGINE

Номер: US20180112564A1
Автор: Barth Armin, BOSCOLO Marco
Принадлежит:

There is described a gasket for a valve of an internal combustion engine; this gasket has a central axis and comprises: an elastically deformable annular seal element; a support member made of plastic material, also annular and having at least a retention portion coupled coaxially on a first portion of the seal element to press it on a guide element of the valve; and elastic means acting on a second portion of the seal element to press it on a stem of the valve; the elastic means comprise a thrust portion of the support member made in one single piece with the retention portion; the seal element is formed by means of an injection moulding operation in a moulding chamber containing the support member. 1111112327811111. A gasket ( , ′ , ″ , ′″ , ″″) for a valve () of an internal combustion engine (); said valve () comprising a guide element () , defining a through seat , and a stem () sliding in said seat; said gasket ( , ′ , ″ , ′″ , ′″) comprising:{'b': 12', '12', '12', '12', '12', '2', '8', '7, 'an elastically deformable seal element (, ′, ″, ′″, ″″), preferably comprising a fluorinated elastomer, having an annular shape with respect to an axis (A) and adapted to be arranged externally on said valve () to cooperate with said stem () and/or with said guide element ();'}{'b': 13', '13', '13', '13', '13', '33', '33', '33', '22', '12', '12', '12', '12', '12', '22', '33', '33', '33', '13', '13', '13', '13', '13', '2, 'a support member (, ′, ″, ′″, ″″) made of plastic, preferably comprising a polyamide polymer, having an annular shape with respect to said axis (A) and having at least one retention portion (, ′, ″) coupled coaxially on a first portion () of said seal element (, ′, ″, ′″, ″″) so that said first portion () is in use radially interposed between said retention portion (, ′, ″) of said support member (, ′, ″, ′″, ″″) and said valve (); and'}{'b': 34', '34', '34', '34', '20', '20', '20', '12', '12', '12', '12', '12', '22', '20', '20', '20', '2, 'elastic means ...

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Номер записи: 70
26-04-2018 дата публикации

PRESSURE REGULATOR

Номер: US20180112630A1
Автор: Ehlig William Eric, Morgan Daniel
Принадлежит:

A pressure regulator including a body having an internal chamber and a thermal shield made of a material having a lower thermal conductivity than a material of the body for reducing heat transfer between the body and the fluid flowing into the internal chamber. By reducing heat transfer between the fluid and the body, the temperature of the components of the pressure regulator is increased to reduce failure of the components and the density of the fluid is increased to improve the flow capacity of the pressure regulator. 117-. (canceled)18. A pressure regulator including:a body having an inlet, an outlet, and a flow passage extending therebetween;a valve seat supported in the body for movement relative to the body for allowing the position of the valve seat to float relative to the body, the valve seat being resiliently biased downward in a first direction and movable upward in a second direction as a function of inlet pressure of fluid flowing through the flow passage; anda poppet movable relative to the valve seat in the second direction from a first position to a second position.19. The pressure regulator according to claim 18 , wherein the valve seat is movable in the second direction by increasing inlet pressure to reduce pressure drop of fluid flowing through a nozzle passageway downstream of the valve seat.20. The pressure regulator according to claim 18 , further including a piston biasing the poppet in the first position.21. The pressure regulator according to claim 20 , wherein the piston is biased in the first direction by one or more resilient members and movable in the second direction by fluid acting on the piston.22. The pressure regulator according to claim 21 , whereby movement of the valve seat in the second direction effects movement of the piston in the second direction.23. The pressure regulator according to claim 18 , further including a nozzle passageway downstream of the valve seat for directing fluid passing through the valve seat into the ...

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Номер записи: 71
07-05-2015 дата публикации

GASKET FOR A VALVE OF AN INTERNAL-COMBUSTION ENGINE"

Номер: US20150123352A1
Автор: BORDABOSSANA Daniele, FERVIER Paolo, Giordano Andrea, ZOPPI Claudio
Принадлежит:

Described herein is a gasket for a valve of an internal-combustion engine; the valve comprises at guide element defining a through seat, find a stein slidably mobile in said seat; the gasket comprises an annular sealing element, which is elastically deformable and is designed to be set externally on the valve to co-operate both with the guide element and with the stem, and an annular supporting member, which is set coaxially on at least part of the sealing element in such a way that the latter is radially pressed between the supporting member and the valve; the supporting member comprises a first portion for interaction with the sealing element and a second portion for positioning in use the gasket on the engine; the first and second portions of the supporting member form part of a first component and a second component respectively, that are distinct from one another and are mounted coaxially by snap-action coupling means. 11232781. A gasket () for a valve () of an internal-combustion engine (); said valve () comprising a guide element () defining a through seat , and a stem () slidably mobile in said seat; said gasket () comprising:{'b': 12', '2', '7', '8, 'an elastically deformable sealing element (), which has an annular conformation about an axis (A) and is designed to be set externally on said valve () to co-operate both with said guide element () and with said stem (); and'}{'b': 13', '12', '13', '2, 'a supporting member () having, an annular conformation, which is set coaxially on at least part of said sealing element () in such a way that the latter is pressed radially between said supporting member () and said valve ();'}{'b': 13', '25', '12', '26', '1', '3, 'wherein said supporting member () comprises a first portion () for interaction with said sealing element () and a second portion () for positioning in use said gasket () on said engine ();'}{'b': 13', '25', '26', '27, 'said gasket being characterized in that said first and second portions of said ...

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Номер записи: 72
13-05-2021 дата публикации

INTERNAL COMBUSTION ENGINE

Номер: US20210140365A1
Автор: Karoliussen Hilberg Inge
Принадлежит:

It is disclosed a boxer engine with two substantially mirror-symmetric engine sides (L, R) comprising a crankshaft () to which is connected, 1. A boxer engine with two substantially mirror-symmetric engine sides including a crankshaft , the boxer engine comprising:at least two main scotch yoke assemblies connected to the crankshaft, each of the at least two main scotch yoke assemblies each having one main piston arranged inside one main cylinder of each engine side, andan auxiliary scotch yoke assembly connected to the crankshaft, the auxiliary scotch yoke assembly having a pair of auxiliary pistons arranged inside a pair of auxiliary cylinders of each engine side,wherein the main scotch yoke assemblies are arranged synchronized on the crankshaft and the auxiliary scotch yoke assembly is arranged 180° offset on the crankshaft,each auxiliary piston defining an outer space and an inner space within each auxiliary cylinder, the inner space facing the opposite engine side, wherein,{'b': '70', 'said inner spaces of each auxiliary cylinder pair are in fluid communication and forming a compression chamber, said compression chamber comprises first and second check valves, wherein the auxiliary cylinder pair is adapted to suck in ambient air through the first check valve and compress and pump said air out through the second check valve () into a main cylinder (I, III; II, IV) of the opposite engine side, and'}said outer spaces of each auxiliary cylinder pair are in fluid communication and are receiving pressurized exhaust gas from a main cylinder of the same engine side.2. A boxer engine according to claim 1 , wherein the auxiliary pistons comprise circumferentially arranged pressure trap grooves.3. A boxer engine according to claim 1 , wherein each main scotch yoke assembly comprises a main piston rod with a polygonal cross-section claim 1 , wherein each main piston rod:at a first end has a swivel connection to the corresponding main piston;at a second end has a threaded ...

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Номер записи: 73
05-05-2016 дата публикации

METHOD FOR MANUFACTURING A TITANIUM-ALUMINUM ALLOY PART

Номер: US20160121400A1
Автор: COURET Alain, MONCHOUX Philippe, THOMAS Marc, VOISIN Thomas
Принадлежит:

A method manufactures a metal alloy part by spark plasma sintering. The method includes the simultaneous application, inside a die, of a uniaxial pressure and of an electric current to a powder component material that has the following composition: 42 to 49% aluminum, 0.05 to 1.5% boron, at least 0.2% of at least one element selected from tungsten, rhenium and zirconium, optionally 0 to 5% of one or more elements selected from chromium, niobium, molybdenum, silicon and carbon, the balance being titanium and the total of the elements without aluminum and titanium being between 0.25 and 12%. 1. A method , comprising: 42 to 49% aluminum,', '0.05 to 1.5% boron,', 'at least 0.2% of at least one element selected from tungsten, rhenium and zirconium,', '0 to 5% of one or more elements selected from chromium, niobium, molybdenum, silicon and carbon,', 'the balance being titanium and the total of the elements without aluminum and titanium being between 0.25 and 12%., 'simultaneously applying a uniaxial pressure and an electric current to equipment containing a powder component material that has the following composition in atomic percentages, 'manufacturing a metal alloy part by spark plasma sintering, the manufacturing including2. The method according to claim 1 , wherein the material comprises at least one of the following elements in the proportions defined below:0.2 to 4% tungsten,0.2 to 4% rhenium,0.2 to 5% zirconium,0 to 3% chromium,0 to 5% niobium,0 to 5% molybdenum,0 to 2% silicon,0 to 1% carbon.3. The method according to claim 1 , wherein the material has the following composition in atomic percentages: 49.92% titanium claim 1 , 48.00% aluminum claim 1 , 2.00% tungsten claim 1 , 0.08% boron.4. The method according to claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a) selecting the composition defined in ,'}b) applying pressure greater than 30 MPa and progressively increasing a temperature to a target temperature between 1200 and 1400° C.c) ...

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Номер записи: 74
04-05-2017 дата публикации

METHOD AND APPRATUS FOR REDUCING EMISSIONS AND/OR REDUCING FRICTION IN AN INTERNAL COMBUSITION ENGINE

Номер: US20170122147A1
Автор: Dolan Shawn E., Golding James P.
Принадлежит:

A method and apparatus for reducing at least one of HC, CO, and NOemissions from an operating internal combustion engine fueled by hydrocarbon or similar fuels, such as alcohols, wherein a portion of the internal combustion chamber has aluminum and/or titanium containing surfaces coated with a titanium dioxide coating further comprising a dopant in and/or on the adherent titanium dioxide coating. 2. The method according to claim 1 , comprising applying the coating to at least one surface of a piston.3. The method according to claim 1 , comprising applying the coating to a surface of walls of a cylinder.4. The method according to claim 1 , comprising applying the coating to a surface of a cylinder head exposed to the combustion chamber.5. The method according to claim 1 , comprising applying the coating to a surface of walls of a cylinder liner.6. The method according to claim 1 , further comprising a dopant in and/or on the chemically adherent titanium dioxide containing coating.7. The method according to claim 1 , wherein the chemically adherent amorphous titanium dioxide containing coating is deposited electrolytically and exhibits an amorphous morphology comprising surface pores which extend only partially into the coating.8. An internal combustion engine comprising:{'sub': 2', 'x', 'x, 'external surfaces and internal surfaces, said internal surfaces comprising a group of internal surfaces located on at least one of a combustion chamber, an exhaust passage, an exhaust manifold, a valve and combinations thereof; at least a portion of said group of internal surfaces being metal selected from aluminum and aluminum alloy; and at least some portions of the metal being coated metal surfaces having a chemically adherent amorphous metal oxide coating comprising TiOelectrolytically deposited and dried and further in the absence of any subsequent oven treatment, said coated metal surfaces positioned such that, during operation of said engine, intake air, fuel/air mixture ...

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Номер записи: 75
31-07-2014 дата публикации

Valve Assembly For Fuel System And Method

Номер: US20140209063A1
Автор: Berg Lucy V., Feng Bao, Flannery Colm M., Taylor Steven C.
Принадлежит: CATERPILLAR, INC.

A valve assembly in an internal combustion engine fuel system includes a valve member movable within a valve body to contact a valve seat and block fluid communication between first and second passages. The valve seat and valve member each include a multi-layered coating having a harder metal nitride base layer and a softer metal nitride outer layer. The base layer is relatively incompliant to impacts between the valve member and the valve seat, and the outer layer is relatively compliant to the impacts and thereby deformable. Related methodology is disclosed. 1. A valve assembly for a fuel system in an internal combustion engine comprising:a valve body having therein a valve seat located fluidly between a first fluid passage and a second fluid passage and being formed of a first metal substrate;a valve member movable within the valve body between a first position at which the valve member contacts the valve seat and blocks fluid communication between the first and second fluid passages, and a second position at which the fluid communication is open, and the valve member being formed of a second metal substrate;the valve seat and the valve member each including a multi-layer coating positioned within a sealing interface formed by the contact at the first position, and having a metal nitride base layer adherent to the corresponding first or second metal substrate, and a metal nitride outer layer;the metal nitride base layer having a greater hardness, such that the metal nitride base layer is relatively incompliant to impacts between the valve member and the valve seat at the first position and limits wear of the valve member and the valve seat during service of the valve assembly in the fuel system; andthe metal nitride outer layer having a lesser hardness, such that the metal nitride outer layer is relatively compliant to the impacts and is thereby deformable to enlarge the sealing interface during break-in of the valve assembly in the fuel system.2. The valve ...

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Номер записи: 76
21-05-2015 дата публикации

Valve for a valve device

Номер: US20150136060A1
Автор: Alexander Puck, Christoph Steinmetz
Принадлежит: MAHLE International GmbH

A valve for a valve device may include a valve stem, which in an axial direction relative to a valve stem axis merges into a valve disc projecting from the valve stem radially. A valve cap may be included composed of a metal. The valve cap may be attached to an axial end portion of the valve stem facing away from the valve disc. The valve cap may cover a face end of the valve stem facing away from the valve disc and may envelope the axial end portion of the valve stem at least partially.

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Номер записи: 77
02-05-2019 дата публикации

VALVE FOR INTERNAL-COMBUSTION ENGINES

Номер: US20190128150A1
Автор: Lerman Pedro Martin, Vieira De Morais Paulo Roberto
Принадлежит:

A valve for an internal-combustion engine may include a body. The body may include a titanium alloy. At least one region of the body may include a nitrided layer. The nitrided layer may include at least one of titanium nitrides and aluminium-titanium nitrides. 1. A valve for an internal-combustion engine comprising a body including a titanium alloy , wherein at least one region of the body includes a nitrided layer including at least one of titanium nitrides and aluminium-titanium nitrides.2. The valve according to claim 1 , wherein the nitrided layer includes at least 50% by volume of the at least one of titanium nitrides and aluminium-titanium nitrides to a depth of 50 microns or more in a thickness of the nitrided layer.3. The valve according to claim 1 , wherein a thickness of the nitrided layer is 500 microns or less.4. The valve according to claim 1 , wherein a surface hardness of the nitrided layer is from 1100 HV to 2000 HV.5. The valve according to claim 1 , wherein a hardness of the nitrided layer is 700 HV or more to a depth of 200 microns or more in a thickness of the nitrided layer.6. The valve according to claim 1 , wherein all surfaces of the body include the nitrided layer.7. The valve according to claim 1 , wherein the at least one region includes a region corresponding to a tip of the body.8. The valve according to claim 1 , wherein the body is composed of the titanium alloy that contains 5.5% by weight to 6.75% by weight of aluminium claim 1 , 3.5% by weight to 4.5% by weight of vanadium claim 1 , and a remainder of titanium and impurities.9. The valve according to claim 1 , wherein the body is composed of the titanium alloy that contains 5.5% by weight to 6.75% by weight of aluminium claim 1 , 1.30% by weight to 2.00% by weight of iron claim 1 , 0.07% by weight to 0.13% by weight of silicon claim 1 , 0.15% by weight to 0.20% by weight of oxygen claim 1 , and a remainder of titanium and impurities.10. The valve according to claim 1 , wherein the ...

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Номер записи: 78
02-05-2019 дата публикации

System for cooling exhaust valve of a reciprocating engine

Номер: US20190128151A1
Автор: Amy Lindblad, Michael Feldner, Ryan Michael Peters
Принадлежит: Ai Alpine Us Bidco Inc

A system includes an engine head that mounts to an engine block of a reciprocating engine, and the engine head includes an intake flow path, an exhaust flow path, a coolant flow path, and first and second sealing registers disposed on opposite sides of the coolant flow path. In addition, the first and second sealing registers are configured to receive a valve guide that supports a valve stem of an exhaust valve. Moreover, the first sealing register is disposed in a wall separating the exhaust flow path and the coolant flow path. Also, a first wall portion of the wall extends between the first sealing register and an exhaust valve seat configured to receive a valve head of the exhaust valve, and a second wall portion of the wall extends from the first sealing register away from the first wall portion.

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Номер записи: 79
19-05-2016 дата публикации

SYSTEMS, METHODS, AND DEVICES FOR VALVE STEM POSITION SENSING

Номер: US20160138484A1
Автор: Hildebrandt Mark William, Nielsen Douglas John
Принадлежит:

A linear variable differential transformer (LVDT) for monitoring engine valve position is disclosed. The system includes a valve guide having an elongated recess through it. The engine valve has a valve head and a valve stem with two adjacent materials having different magnetic properties meeting at an interface. The valve stem fits and moves linearly within the valve guide, and the valve head closes an engine combustion chamber. It also includes monitoring coils within the valve guide that create a signal related to the position of the interface within the valve guide. An engine control unit (ECU) is coupled to the monitoring coils and receives and analyzes the signal from the monitoring coils to determine operation of the valve. 1. A system for measuring a position of a valve in an internal combustion engine , the system comprising:a valve guide having a central recess with a constant diameter passing through a length of the valve guide, 'a valve stem including a first section having a first magnetic property adjacent to a second section having a second magnetic property and an interface between the first section and the second section, the first section, the second section and the interface comprising a single outer diameter less than the constant diameter of the valve guide,', 'wherein the valve of the internal combustion engine comprises 'a linear variable differential transformer (LVDT) located around the valve stem and adapted to generate a signal indicating motion of the valve stem,', 'wherein the valve stem is received by the central recess and the valve stem is adapted to move linearly through the central recess; and'}wherein the valve guide has an external recess and wherein windings of the LVDT are positioned within the external recess of the valve guide.2. The system of claim 1 , wherein the first section comprises an armature.3. The system of wherein a location of the interface on the valve stem is selected and the LVDT position is selected to surround ...

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Номер записи: 80
17-05-2018 дата публикации

Gas Exchange Valve For An Internal Combustion Engine And Internal Combustion Engine

Номер: US20180135476A1
Автор: LITZEL Georg
Принадлежит:

A gas exchange valve, with a valve stem carrying a valve body and a valve seat for the valve body. When closed, the valve body lies against the valve seat and when opened the valve body does not lie against the valve seat. A valve guide guides the valve stem. The valve guide has a radially inner groove that receives a separate wiping element for the valve stem. 1. A gas exchange valve , comprising:a valve bodya valve stem carrying the valve body;a valve seat configured to mate with the valve body, wherein a closed gas exchange valve has the valve body in contact with the valve seat and an opened gas exchange valve does not have the valve body in contact with the valve seat;a valve guide configured to guide the valve stem and having a radially inner groove; anda separate wiping element for the valve stem arranged in the radially inner groove of the valve guide.2. The gas exchange valve according to claim 1 , wherein the wiping element projects radially inward relative to the radially inner groove.3. The gas exchange valve according to claim 1 , wherein the wiping element is aligned concentrically with respect to the valve stem.4. The gas exchange valve according to claim 1 , wherein the radially inner groove fixes the wiping element for the valve stem in the radially inner groove seen in movement direction of the valve stem.5. The gas exchange valve according claim 1 , wherein the wiping element for the valve stem comprises a metallic material.6. An internal combustion engine comprising:at least one cylinder;at least one inlet-side gas exchange valve for charge air; and a valve body', 'a valve stem carrying the valve body;', 'a valve seat configured to mate with the valve body, wherein a closed gas exchange valve has the valve body in contact with the valve seat and an opened gas exchange valve does not have the valve body in contact with the valve seat;', 'a valve guide configured to guide the valve stem and having a radially inner groove; and', 'a separate wiping ...

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Номер записи: 81
08-09-2022 дата публикации

Poppet Valve and Internal Combustion Piston Engine Head Including Same

Номер: US20220282645A1
Автор: Kipnis Michael
Принадлежит: Cyclazoom, LLC

Internal combustion piston engine includes a cylinder head partly defining two ducts and a combustion chamber, and poppet valves movably arranged in the cylinder head between positions allowing or preventing flow between the combustion chamber and the ducts. The poppet valve has a stem, a valve head having a hollow interior space, a lower surface facing the combustion chamber, an upper surface including a portion adjacent the stem, and a peripheral edge section that extends from the upper surface of the valve head to the lower surface. The valve head is formed separate from but connected to the valve stem in a manner to enclose the hollow space, for example, by a circumferential welding seam. The peripheral edge section contains an arcuate contact surface that extends from the upper to lower surfaces of the valve head and without any sharp edges between upper and lower surfaces. 1. A poppet valve for an internal combustion piston engine , comprising:a stem;a valve head having a lower surface and an upper surface opposite said lower surface and including a portion adjacent said stem, and a peripheral edge section that extends from said upper surface of said valve head to said lower surface of said valve head,said peripheral edge section being curved entirely from said upper surface of said valve head to said lower surface of said valve head, and′said lower surface of said valve head being curved outward in a direction away from said stem over its entirety,whereby said peripheral edge section and said lower surface of said valve head do not include sharp elements.2. The poppet valve of claim 1 , wherein said valve head is solid.3. The poppet valve of claim 1 , wherein said valve head has a hollow interior.4. The poppet valve of claim 3 , wherein said valve head is separate from said valve stem and connected to said valve stem in a manner to enclose a hollow space to provide the hollow interior.5. The poppet valve of claim 4 , wherein said valve head is connected to ...

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Номер записи: 82
09-05-2019 дата публикации

Hardfacing alloy and hardfacing member

Номер: US20190136346A1
Автор: Hajime Kato, Hironori Aoyama, Hisao FUKUHARA, Jun NOMASAKI, Kouji Tanaka, Minoru Kawasaki, Naoyuki Miyara, Natsuki Sugiyama, Tadashi Oshima, Takashi Saito
Принадлежит: Toyota Central R&D Labs Inc, Toyota Motor Corp

A hardfacing alloy satisfies the following condition when the hardfacing alloy as a whole is 100 mass % (also simply referred to as “%,” hereinafter), Ni: 10-25%, Si: 1-3%, Fe: 3-18%, the total of one or more elements of Mo, W, and Nb: 6.5-20%, and the balance: Cu and impurities. In particular, it preferably satisfies Fe+2Mo≥22.6(%), Mo equivalent/Fe≥1.17, and Mo equivalent=Mo+0.522W+1.033Nb. In a hardfacing part composed of the hardfacing alloy, coarse hard particles are formed to ensure the wear resistance, and a soft phase present in the hard particles ensures the machinability. This may be understood as a raw material powder for hardfacing treatment and may also be understood as a hardfacing member in which a hardfacing part is formed on a base material using the raw material powder.

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Номер записи: 83
30-04-2020 дата публикации

METHOD FOR MOUNTING A VALVE SEAT RING ON A CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE

Номер: US20200131952A1
Автор: Beerens Christoph, Heckendorn Heiko
Принадлежит:

A method for mounting a valve seat ring on a cylinder head of an internal combustion engine includes providing a valve seat ring, which has a ring height, and which is measured along an axial direction. The valve seat ring includes a support portion made of a support material and a functional portion made of a functional material. The valve seat ring is arranged on the cylinder head and the support portion of the support material is at least partially removed, so that the ring height of the valve seat ring is reduced. 1. A method for mounting a valve seat ring on a cylinder head of an internal combustion engine , the method comprising:a) providing the valve seat ring having a ring height measured along an axial direction, the valve seat ring including a support portion made of a support material and a functional portion made of a functional material;b) arranging the valve seat ring on the cylinder head; andc) at least partially removing the support portion made of the support material, such that the ring height of the valve seat ring is reduced.2. The method according to claim 1 , further comprising:after performing step b):at least partially forming a first axial end portion of the valve seat ring facing the cylinder head by the functional portion; andat least partially forming a second axial end portion of the valve seat ring facing away from the cylinder head by the support portion.3. The method according to claim 1 , wherein a separating surface between the functional portion and the support portion runs at least in portions along a radial direction of the valve seat ring.4. The method according to one of claim 3 , wherein the separating surface between the functional portion and the support portion runs at least in portions along the axial direction of the valve seat ring.5. The method according to claim 1 , further comprising:after performing step b), arranging the support portion and the functional portion next to one another along the axial direction.6. The ...

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Номер записи: 84
26-05-2016 дата публикации

Moment-cancelling 4-stroke engine

Номер: US20160146008A1
Автор: Daniel Sexton Gurney
Принадлежит: Individual

A moment-cancelling, four-stroke engine is disclosed. The engine includes a first cylinder having a first piston and a second cylinder having a second piston, a first crankshaft operably connected to the first piston and a second crankshaft operably connected to the second piston. The first crankshaft rotates in a first direction and the second crankshaft rotates in a second direction that is opposite the first direction to cancel the moments applied to the engine and reduce engine vibration.

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Номер записи: 85
09-05-2019 дата публикации

GAS EXCHANGE VALVE FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20190136982A1
Автор: Luven Christoph
Принадлежит: MAHLE International GmbH

A gas exchange valve for an internal combustion engine has a valve body including a valve stem extending along an axial valve stem axis and a valve head adjoining the valve stem radially widening with regarding to the valve stem axis and extending in an axial direction away from the valve stem along the axial valve stem axis. Between a base surface of the valve head formed substantially orthogonally to the valve stem axis and the valve stem, a valve seat surface is formed on the valve head. In the base surface of the valve head, at least one recess is provided, wherein the at least one recess is arranged to locally reduce a stiffness of the valve head in a region of the valve seat surface. 1. A gas exchange valve for an internal combustion engine , the gas exchange valve having a valve body comprising:a valve stem extending along an axial valve stem axis, anda valve head adjoining the valve stem radially widening with regarding to the axial valve stem axis and extending in an axial direction away from the valve stem,wherein, between a base surface of the valve head formed substantially orthogonally to the axial valve stem axis and the valve stem, a valve seat surface is formed on the valve head,wherein, in the base surface of the valve head, at least one recess is provided,wherein the at least one recess is arranged to locally reduce a stiffness of the valve head in a region of the valve seat surface.2. The gas exchange valve according to claim 1 , wherein the at least one recess is formed as an annular groove.3. The gas exchange valve according to claim 2 , wherein the annular groove is arranged spaced from an outer edge of the base surface of the valve head.4. The gas exchange valve according to claim 2 , wherein the annular groove is arranged on an outer edge of the base surface of the valve head.5. The gas exchange valve according to claim 1 , wherein the at least one recess is spherical and arranged eccentrically about the axial valve stem axis.6. An internal ...

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Номер записи: 86
10-06-2021 дата публикации

PREPARING METHOD OF ENGINE VALVE

Номер: US20210172034A1
Автор: Park Sung Hwan
Принадлежит:

A method of preparing an engine valve is provided. The method includes hot forging a heat resistant steel at 1,150 to 1,250° C. to mold a valve, aging the molded valve and hollowed-out processing the aging valve. Additionally, the method includes nitride-heating the hollow valve and grinding a surface of a neck of the nitride-heated valve to remove a nitride layer. 1. A method of preparing an engine valve , comprising:hot forging a heat resistant steel at 1,150 to 1,250° C. to mold a valve;aging the molded valve;hollowed-out processing the aging valve;nitride-heating the hollow valve; andgrinding a surface of a neck of the nitride-heated valve to remove a nitride layer.2. The method of claim 1 , wherein the aging of the molded valve is performed for 0.8 to 1.2 hours at 740 to 780° C.3. The method of claim 1 , wherein the molding of the valve includes the hot forging at 1 claim 1 ,150 to 1 claim 1 ,250° C. for 15 to 25 seconds.4. The method of claim 1 , wherein the neck to be grinded is disposed 10 to 40 mm away from an inlet which has a largest diameter of the valve.5. The method of claim 1 , wherein the removing of the nitride layer includes grinding the surface of the neck by 30 to 70 μm in depth.6. The method of claim 1 , further comprising:grinding the surface of the hollow valve to perform surface treatment between the hollowed-out processing and the nitride-heating.7. An engine valve made of heat-resistance steel and having a hollowness claim 1 , comprising a nitride layer claim 1 , wherein the nitride layer is formed on a surface of the valve excluding a neck of the valve.8. The engine valve of claim 7 , wherein an average size of grains of an internal matrix is 2 to 5 μm.9. The engine valve of claim 7 , wherein rupture time is 50 to 70 minutes when a static load of 160 MPa is applied at 800° C.10. The engine valve of claim 7 , wherein the neck is disposed 10 to 40 mm away from an inlet which has a maximum diameter of the valve.11. An engine comprising an ...

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Номер записи: 87
04-06-2015 дата публикации

HIGH PERFORMANCE NICKEL-BASED ALLOY

Номер: US20150152752A1
Автор: Bowsher Lawrence A., Qiao Cong Yue, SMITH SCOTT A., Ward Daniel E.
Принадлежит: L. E. Jones Company

A nickel-based alloy includes, in weight percent, carbon from about 0.7 to about 2%; manganese up to about 1.5%; silicon up to about 1.5%; chromium from about 25 to about 36%; molybdenum from about 5 to about 12%; tungsten from about 12 to about 20%; cobalt up to about 1.5%; iron from about 3.5 to about 10%; nickel from about 20 to about 55%; and incidental impurities. The alloy is suitable for use in elevated temperature applications such as in valve seta inserts for internal combustion engines. 1. A nickel-based alloy comprising , in weight percent:carbon from about 0.7 to about 2%;manganese up to about 1.5%;silicon up to about 1.5%;chromium from about 25 to about 36%;molybdenum from about 5 to about 12%;tungsten from about 12 to about 20%;cobalt up to about 1.5%;iron from about 3.5 to about 10%;nickel from about 20 to about 55%; andincidental impurities.2. The nickel-based alloy according to claim 1 , comprising:carbon from about 1 to about 1.9%;manganese up to about 0.6%;silicon up to about 0.7%;chromium from about 26 to about 33%;molybdenum from about 6.5 to about 10%;tungsten from about 14.5 to about 16.5%;cobalt up to about 0.6%;iron from about 5 to about 8.5%;nickel from about 29 to about 44%; andincidental impurities.3. The nickel-based alloy according to claim 1 , comprising:carbon from about 1.1 to about 1.8%;manganese from about 0.1 to about 0.6%;silicon from about 0.1 to about 0.7%;chromium from about 28.5 to about 33%;molybdenum from about 7 to about 9%;tungsten from about 14.5 to about 16.5%;cobalt up to about 0.6%;iron from about 5 to about 8.5%;nickel from about 29 to about 44%; andincidental impurities.4. The nickel-based alloy according to claim 1 , wherein the nickel-based alloy has a microstructure comprising eutectic phases in an amount of at least about 95 volume percent.5. The nickel-based alloy according to claim 4 , wherein the eutectic phases have lamellar morphology.6. The nickel-based alloy according to claim 4 , wherein the eutectic ...

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Номер записи: 88
04-06-2015 дата публикации

SINTERED IRON-BASED ALLOY VALVE SEAT

Номер: US20150152753A1
Автор: HASHIMOTO Kimiaki, HENMI Hiroji
Принадлежит: Kabushiki Kaisha Riken

To provide an iron-based sintered alloy valve seat having excellent wear resistance and machinability, which can be used for high-power diesel engines, an intermetallic compound having Vickers hardness Hv of 800-1200 is used, and C and P in the composition of the iron-based sintered valve seat are by mass 1.2-1.6% and 0.80-1.35%, respectively. 1. An iron-based sintered valve seat comprising 5-14% by volume of hard intermetallic compound particles having an average particle size of 5-200 tm and Vickers hardness Hv of 800-1200 dispersed in a matrix having a composition comprising C , Si , Cr , Mo V and P , the balance being Fe and inevitable impurities; C and P being by mass 1.2-1.6% and 0.80-1.35% , respectively , based on said iron-based sintered valve seat.2. The iron-based sintered valve seat according to claim 1 , wherein a raw material powder formulated such that said matrix has a composition comprising by mass 1.3-1.85% of C claim 1 , 0.4-0.8% of Si claim 1 , 10.0-13.0% of Cr claim 1 , 0.8-1.2% of Mo claim 1 , 1.7-2.2% of V claim 1 , and 0.80-1.72% of P claim 1 , the balance being Fe and inevitable impurities claim 1 , is used.3. The iron-based sintered valve seat according to claim 1 , wherein said hard particles are made of an Fe—Mo—Si alloy and/or a Cr—W—Co—Fe alloy.4. The iron-based sintered valve seat according to claim 3 , wherein said Fe—Mo—Si alloy comprises by mass 40-70% of Mo claim 3 , 0.4-2.0% of Si claim 3 , and 0.1% or less of C claim 3 , the balance being Fe and inevitable impurities; and wherein said Cr—W—Co—Fe alloy comprises by mass 27-33% of Cr claim 3 , 22-28% of W claim 3 , and 8-12% of Co claim 3 , the balance being Fe and inevitable impurities.5. The iron-based sintered valve seat according to claim 4 , wherein said Si claim 4 , Cr claim 4 , Mo and V are by mass 0.5-0.9% claim 4 , 8.0-11.0% claim 4 , 5.0-10.0% claim 4 , and 1.4-1.9% claim 4 , respectively claim 4 , based on the iron-based sintered valve seat.6. The iron-based sintered ...

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Номер записи: 89
04-06-2015 дата публикации

Seal

Номер: US20150152754A1
Автор: CLEMENS Markus, Heldmann Ralf, JAKOB Ernst, ZIEGLER Günter
Принадлежит: CARL FREUDENBERG KG

A seal including a sealing ring () made from an elastomeric material, an intermediate ring () made from a polymeric material, and a supporting ring (), the sealing ring (), the intermediate ring () and the supporting ring () being arranged concentrically with respect to one another, and the sealing ring () and the supporting ring () being arranged in each case on the sides of the intermediate ring () which face away axially from one another. The sealing ring (), the intermediate ring (), and the supporting ring () form a pre-assembled unit (). 11231231321234. A seal , comprising a sealing ring () made from an elastomeric material , an intermediate ring () made from a polymeric material and a supporting ring () , the sealing ring () , the intermediate ring () and the supporting ring () being arranged concentrically with respect to one another , and the sealing ring () and the supporting ring () being arranged in each case on the sides of the intermediate ring () which face away axially from one another , characterized in that the sealing ring () , the intermediate ring () and the supporting ring () form a pre-assembled unit ().2213. The seal according to claim 1 , wherein the intermediate ring () is connected in each case in a material-to-material manner to the sealing ring () and the supporting ring ().31. The seal according to claim 1 , wherein the sealing ring () is composed of an FKM material.4. The seal according to claim 3 , wherein the FKM material has a Shore A hardness of from 60 to 90.52. The seal according to claim 1 , wherein the intermediate ring () is composed of a PA6.6 material.63. The seal according to claim 1 , wherein that the supporting ring () is composed of a metallic or a sintered material.7152. The seal according to claim 1 , wherein the sealing ring () has at least one axial sealing lip () on the side which faces axially away from the intermediate ring ().8215152. The seal according to claim 1 , wherein claim 1 , on the side which faces ...

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Номер записи: 90
25-05-2017 дата публикации

SINTERED VALVE SEAT AND ITS PRODUCTION METHOD

Номер: US20170145875A1
Автор: HASHIMOTO Kimiaki
Принадлежит: Kabushiki Kaisha Riken

To provide a press-fit, sintered valve seat having high valve coolability and wear resistance for use in a high-efficiency engine, and its production method, Cu powder having an average particle size of 45 μm or less and purity of 99.5% or more is used to form a network-connected Cu matrix, even though a relatively large amount of hard Co-based alloy particles are added; and Fe—P alloy powder is used for densification by liquid-phase sintering. 1. A sintered valve seat having hard Co-based alloy particles dispersed in a Cu matrix; said sintered valve seat comprising by mass 2.1-6.0% of Fe and 0.8-2.2% of P , in addition to components forming said Cu matrix and said hard particles.2. The sintered valve seat according to claim 1 , which further comprises 5% or less by mass of Ni.3. The sintered valve seat according to claim 1 , wherein said hard particles are made of a Co—Mo—Cr—Si alloy or a Co—W—Cr—C alloy having an average particle size of 5-100 μm.4. The sintered valve seat according to claim 3 , wherein said Co—Mo—Cr—Si alloy comprises by mass 27.5-30.0% of Mo claim 3 , 7.5-10.0% of Cr claim 3 , and 2.0-4.0% of Si claim 3 , the balance being Co and inevitable impurities.5. The sintered valve seat according to claim 3 , wherein said Co—W—Cr—C alloy comprises by mass 3.0-10.0% of W claim 3 , 25.0-31.0% of Cr claim 3 , and 1.0-2.0% of C claim 3 , the balance being Co and inevitable impurities.6. The sintered valve seat according to claim 4 , wherein said hard particles have Vickers hardness of 500-800 HV0.1.7. The sintered valve seat according to claim 4 , wherein said hard particles are in an amount of 30-70% by mass.8. A method for producing a sintered valve seat having hard Co-based alloy particles dispersed in a Cu matrix comprising the steps of compressing claim 4 , molding and sintering a mixed powder of Cu powder claim 4 , alloy element powder and said hard particles; said Cu powder having an average particle size of 45 μm or less and purity of 99.5% or more; ...

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Номер записи: 91
16-05-2019 дата публикации

VALVE SEAT RING

Номер: US20190143415A1
Автор: Blecking Christian, Emde Dirk, Hammelmann Robert, Hunsche Ingwar, Kohler Ekkehard, Seyfarth Anna
Принадлежит: Bleistahl-Produktions GmbH &Co KG

The invention relates to a highly heat conductive valve seat ring () comprising a carrier layer () and a functional layer (), wherein the carrier layer () consists of a solidified copper matrix containing 0.10 to 20% w/w of a solidifying component s and the functional layer (3) consists of a solidified copper matrix which further contains, based on the copper matrix, 5 to 35% w/w of one or more hard phases. 112323. Valve seat ring () comprising a carrier layer () and a functional layer () , characterized in that the carrier layer () consists of a solidified copper matrix containing 0.10 to 20% w/w of a solidifying/strengthening component and the functional layer () consists of a solidified copper matrix which further contains , based on the copper matrix , 5 to 35% w/w of one or more hard phases.2. Valve seat ring according to claim 1 , characterized in that the solidifying component of the copper matrix is an oxide claim 1 , in particular AlOor YO.3. Valve seat ring according to claim 1 , characterized in that the solidifying component of the copper matrix is an intermetallic phase claim 1 , in particular containing Cu claim 1 , Cr claim 1 , Zr claim 1 , Nb claim 1 , Ni and/or Si.4. Valve seat ring according to claim 1 , characterized in that the solidifying component is AlOor CrNb.5. Valve seat ring according to claim 1 , characterized in that the hard phase of the functional layer is a hard phase based on iron claim 1 , cobalt claim 1 , nickel claim 1 , a carbide claim 1 , oxide and/or nitride.6. Valve seat ring according to claim 5 , characterized in that the hard phase is a hard phase based on iron claim 5 , nickel or cobalt.7. Valve seat ring according to claim 1 , characterized in that the functional layer contains 0.1 to 5% w/w of a solid lubricant.8. Valve seat ring according to claim 7 , characterized in that the solid lubricant is MnS claim 7 , MoS claim 7 , WS claim 7 , CaFor hexagonal BN.9232. Valve seat ring according to claim 1 , characterized in that ...

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Номер записи: 92
17-06-2021 дата публикации

ENGINE HEAD ASSEMBLY WITH VALVE SEAT INSERT WITH STIFFNESS RELIEF CUTOUT

Номер: US20210180478A1
Автор: Krieger Jeffrey Clark, Roley Michael Dean
Принадлежит: CATERPILLAR INC.

An engine head assembly includes a valve seat insert having a valve seating surface defining a center axis, and each of an inner peripheral surface and an outer peripheral surface extending circumferentially around the valve seat center axis. The outer peripheral surface includes an upper section interference-fitted with the engine head, and a lower section. A stiffness relief channel is formed by a relief cutout in the valve seat insert, and extends radially between the lower section of the outer peripheral surface and the engine head. The stiffness relief channel permits flexing of the valve seat insert to cushion valve seating to prolong engine valve and valve seat insert service life. 1. An engine head assembly comprising:an engine head including a fireside surface structured to face a cylinder in an engine, and the engine head having formed therein a valve seat bore, and a gas exchange conduit connecting to the valve seat bore;a valve seat insert including a valve seating surface defining a center axis, a first axial end abutting the engine head within the valve seat bore, and a second axial end;a gas exchange valve including a valve head, and being movable between a closed valve position where the valve head contacts the valve seating surface, and an open valve position;the valve seat insert further including an inner peripheral surface extending circumferentially around the valve seat center axis and forming a throat, for communicating gases between the gas exchange conduit and the cylinder, and an outer peripheral surface;the outer peripheral surface including an upper section adjacent to the first axial end and interference-fitted with the engine head within the valve seat bore, and a lower section extending between the upper section and the second axial end; anda stiffness relief channel extends radially between the lower section of the outer peripheral surface and the engine head, and the stiffness relief channel being circumferential of the valve seat ...

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Номер записи: 93
17-06-2021 дата публикации

POPPET VALVE

Номер: US20210180479A1
Автор: Aimasso Alberto, Lia Luigi, Mancuso Francesca
Принадлежит:

A poppet valve includes: a valve body comprising a valve stem body, a valve head body with a valve combustion face, and a valve fillet body interconnecting the valve stem body and the valve head body. The valve fillet body surface has an increased thermal resistance compared to the valve combustion face. 1. A poppet valve , comprising:a valve body comprising a valve stem body, a valve head body with a valve combustion face, and a valve fillet body interconnecting the valve stem body and the valve head body,whereinthe valve fillet body surface has an increased thermal resistance compared to the valve combustion face.2. The poppet valve according to claim 1 , wherein a thermal barrier coating is arranged on the valve fillet body to provide an increased thermal resistance.3. The poppet valve according to claim 2 , wherein the thermal barrier coating comprises ferrite particles arranged by crystal growth claim 2 , a silica based inorganic compound claim 2 , spray painting of hollow ceramic balls claim 2 , or a thermal spray of Yttria-stabilized zirconia.4. The poppet valve according to claim 2 , wherein a bond coating is interposed between the thermal barrier coating and the valve fillet body.5. The poppet valve according to claim 2 , wherein a coating thickness is between 0.1 mm and 0.6 mm.6. The poppet valve according to claim 1 , wherein the valve combustion face is uncoated.7. The poppet valve according to claim 1 , wherein a cavity is arranged in the valve body claim 1 , andwherein the cavity is filled with a heat conducting material.8. A method for manufacturing the poppet valve according to claim 1 , which method comprises the steps of:providing the poppet valve having the valve body comprising the valve stem body, the valve head body with the valve combustion face, and a valve fillet body interconnecting the valve stem body and the valve head body; andusing either atmospheric plasma spraying (APS) or high velocity oxygen fuel spraying (HVOF) to arrange a thermal ...

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Номер записи: 94
17-06-2021 дата публикации

ENGINE VALVE WITH RAISED RING OR DIMPLE

Номер: US20210180480A1
Автор: Krieger Jeffrey Clark, Rader Kyle Michael, Roley Michael D.
Принадлежит: CATERPILLAR INC.

An engine valve includes a stem, a head comprising an outer lip surface, a seating surface extending from the outer lip surface toward the stem, and a combustion surface extending from the outer lip surface on the opposite side of the head as compared to the seating surface. The combustion surface includes a first convex arcuate surface spaced away from the outer lip surface, at least partially forming a raised ring, and a first concave arcuate surface spaced away from the outer lip surface, at least partially forming a dimple. 1. An engine head assembly for an internal combustion engine comprising:an engine head having a fluid conduit formed therein; andan engine valve including a stem, a head comprising an outer lip surface, a seating surface interposed between the stem toward and the outer lip surface, and a combustion surface extending from the outer lip surface on the opposite side of the head as compared to the seating surface;wherein the combustion surface includes a first convex arcuate surface spaced away from the outer lip surface, at least partially forming a raised ring, and a first concave arcuate surface spaced away from the outer lip surface, at least partially forming a dimple.2. The engine head assembly of wherein the engine valve includes a body of revolution claim 1 , defining an axis of revolution claim 1 , a radial direction perpendicular to the axis of revolution claim 1 , and a circumferential direction about the axis of revolution claim 1 , and the raised ring and the dimple that extend circumferentially about the axis of revolution.3. The engine head assembly of wherein the first convex arcuate surface is spaced away a first radial distance from the outer lip surface claim 2 , and the first concave arcuate surface is spaced away from the outer lip surface a second radial distance from the outer lip surface that is greater than the first radial distance.4. The engine head assembly of wherein the combustion surface further comprises a first ...

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Номер записи: 95
01-06-2017 дата публикации

ENGINE VALVE

Номер: US20170152768A1
Автор: Qu Rong
Принадлежит: CATERPILLAR INC.

A valve for use in an internal combustion engine is provided. The valve includes a valve head. The valve head includes a combustion face configured to face a combustion chamber of the internal combustion engine. The combustion face includes an angular side portion. The combustion face also includes a central recess portion defining an inner diameter and an outer diameter. The inner diameter and the outer diameter together define a depth of the central recess portion. The valve also includes a neck portion configured to connect the valve head with a valve stem of the valve. 1. A valve for use in an internal combustion engine , the valve comprising: an angular side portion; and', 'a central recess portion defining an inner diameter and an outer diameter, wherein the inner diameter and the outer diameter together define a depth of the central recess portion; and, 'a combustion face configured to face a combustion chamber of the internal combustion engine, the combustion face comprising, 'a valve head comprisinga neck portion configured to connect the valve head with a valve stem of the valve.2. The valve of claim 1 , wherein the valve includes at least one of an intake valve and an exhaust valve.3. The valve of claim 1 , wherein a deflection of the combustion face relative to an imaginary plane is between 0.07 mm and 0.082 mm.4. The valve of claim 1 , wherein the depth of the central recess portion is between 3 mm and 4 mm.5. The valve of claim 1 , wherein a radius of the neck portion is between 12 mm and 20 mm.6. The valve of claim 5 , wherein the radius of the neck portion is 17 mm.7. The valve of claim 1 , wherein an angle defined between the angular side portion of the combustion face and a planar surface of the combustion face is between 9° and 10° claim 1 , the planar surface being disposed between the angular side portion and the central recess portion.8. An engine comprising:a cylinder block having at least one combustion chamber;a cylinder head positioned on ...

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Номер записи: 96
09-06-2016 дата публикации

VALVE SEAT STRUCTURE

Номер: US20160160699A1
Автор: Baek Hong Kil, LEE Seung Woo, LEE Tae Won
Принадлежит:

A valve seat structure includes a cylinder head configured to be mounted at an upper part of a combustion chamber, at least one valve port configured to be formed at a part of the cylinder head being opened and closed by a valve, and a valve seat configured to be mounted along an inner circumferential surface of the valve port, wherein a part of the valve seat is provided with a high hardness material portion made from a high hardness material. 1. A valve seat structure , comprising:a cylinder head mounted at an upper part of a combustion chamber;at least one valve port formed at a part of the cylinder head being opened and closed by a valve; anda valve seat mounted along an inner circumferential surface of the valve port,wherein a part of the valve seat is provided with a high hardness material portion made from a high hardness material.2. The valve seat structure of claim 1 , wherein the valve is an exhaust valve.3. The valve seat structure of claim 1 , wherein the valve is an intake valve.4. The valve seat structure of claim 1 , wherein the high hardness material portion is formed in a fan-shaped arc and is positioned to face a spark plug.5. The valve seat structure of claim 4 , wherein a central angle of the fan-shaped arc ranges from 10° to 350°.6. The valve seat structure of claim 5 , wherein the high hardness material portion is made from one material.7. The valve seat structure of claim 5 , wherein the high hardness material portion is made from at least one material including a high hardness material and the high hardness material is formed at a portion contacting the valve.8. The valve seat structure of claim 5 , wherein the high hardness material portion is made from one material into which a copper component is infiltrated.9. The valve seat structure of claim 5 , wherein the high hardness material portion is made from at least one material including a high hardness material and the high hardness material is positioned in an inner side of the valve seat ...

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Номер записи: 97
09-06-2016 дата публикации

SINTERED ALLOY VALVE GUIDE AND ITS PRODUCTION METHOD

Номер: US20160160700A1
Автор: Takahashi Rintarou
Принадлежит: Kabushiki Kaisha Riken

To provide a sintered alloy valve guide having high thermal conductivity and excellent wear resistance, which can be used in engines subjected to a large thermal load due to downsizing, direct injection and supercharging, the sintered alloy has a composition comprising by mass 10-90% of Cu, 0-10% of Cr, 0-6% of Mo, 0-8% of V, 0-8% of W, and 0.5-3% of C, the balance being substantially Fe and inevitable impurities, the total amount of Cr, Mo, V and W being 2% or more, and a structure comprising an Fe-based alloy phase, a Cu or Cu-based alloy phase, and a graphite phase. 1. A sintered alloy valve guide having a composition comprising by mass 10-90% of Cu , 0-10% of Cr , 0-6% of Mo , 0-8% of V , 0-8% of W , and 0.5-3% of C , the balance being substantially Fe and inevitable impurities , the total amount of Cr , Mo , V and W being 2% or more , and having a structure comprising an Fe-based alloy phase , a Cu or Cu-based alloy phase , and a graphite phase.2. The sintered alloy valve guide according to claim 1 , wherein said Fe-based alloy phase is an Fe—Mo—C alloy claim 1 , an Fe—Cr—Mo—V—C alloy claim 1 , an Fe—Cr—V—W—C alloy claim 1 , or an Fe—Cr—Mo—V—W—C alloy.3. The sintered alloy valve guide according to claim 2 , wherein said Fe-based alloy phase has a composition comprising by mass 0-10% of Cr claim 2 , 0-6% of Mo claim 2 , 0-8% of V claim 2 , 0-8% of W claim 2 , and 0.5-1% of C claim 2 , the balance being substantially Fe and inevitable impurities claim 2 , the total amount of Cr claim 2 , Mo claim 2 , V and W being 2% or more.4. The sintered alloy valve guide according to claim 1 , wherein said Cu or Cu-based alloy phase is continuous in the structure.5. The sintered alloy valve guide according to claim 4 , wherein said Cu or Cu-based alloy phase has thermal conductivity of 200 W/mK or more.6. A method for producing a sintered alloy valve guide comprising the steps of coating prealloy powder having a composition comprising by mass 0-10% of Cr claim 4 , 0-6% of Mo ...

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Номер записи: 98
23-05-2019 дата публикации

INTERNAL COMBUSTION ENGINE AND STRADDLED VEHICLE HAVING THE SAME

Номер: US20190153911A1
Автор: MIYATA Manabu
Принадлежит: YAMAHA HATSUDOKI KABUSHIKI KAISHA

An internal combustion engine includes an intake valve spring including a closely-wound section and a sparsely-wound section The closely-wound section is provided so that elemental wire portions thereof are closely in contact with each other in the direction of the coil axial line L while an intake valve closes an intake port. The sparsely-wound section is provided so that elemental wire portions thereof are spaced apart from each other in the direction of the coil axial line L while the intake valve closes the intake port. The coil outer diameter D of at least a part of the closely-wound section is smaller than the coil outer diameter D of at least a part of the sparsely-wound section 1. An internal combustion engine comprising:a cylinder head provided with a port having an opening that is open toward a combustion chamber;a valve including a valve stem end and a valve body end opposite the valve stem end, a valve stem extending straight from the valve stem end and slidably supported by the cylinder head, and a valve body provided at the valve body end of the valve and located inside the opening, the valve configured to open and close the opening of the port;a first valve spring seat supported on the cylinder head;a second valve spring seat supported on the valve stem end of the valve;a valve spring, which is a compression coil spring, placed between the first valve spring seat and the second valve spring seat and supported on the first valve spring seat and the second valve spring seat;a valve lifter supported on the valve stem end; anda cam configured to periodically push the valve lifter as the cam rotates, wherein:the valve spring includes an array of elemental wire portions extending in a coil axial line direction, wherein each elemental wire portion represents one helical round of the valve spring;the array of elemental wire portions includes a closely-wound section supported on the first valve spring seat and a sparsely-wound section placed closer to the ...

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Номер записи: 99
23-05-2019 дата публикации

COMBUSTION ENGINE

Номер: US20190153912A1
Автор: Breunesse Richard Theodoor, Kemp de Jong Sjouke, Krijgsman Jacob Theodorus, Teake de Jong Arjen
Принадлежит:

A combustion engine comprises combustion chambers (-) with reciprocating pistons (), intake ports () and exhaust ports (). Overflow ports () are provided between adjacent combustion chambers to provide an overflow channel () that closes during a high load mode of operation of said engine and opens during a partial load mode of operation. The overflow ports () straddle a path of shortest distance between adjacent combustion chambers and said overflow channel () extends at least substantially along said path of shortest distance. In a further aspect of the invention, exhaust ports () of adjacent combustion chambers are joined into a common exhaust channel (PP) that communicates with an exhaust header () of the engine through valve means (V,V) that open during the high load mode of operation of said engine and close during a partial load mode of operation. 1. Combustion engine , comprising at least a first combustion chamber and a second combustion chamber that are adjacent to one another , said first combustion chamber and said second combustion chamber each having a reciprocating piston , at least one intake port , at least one exhaust port and an overflow port , in which the overflow port of said first combustion chamber and said overflow port of said second combustion chamber are connected with one another through an overflow channel that comprises an overflow valve which closes said overflow channel during a high load mode of operation of said engine and opens said overflow channel during a partial load mode of operation of said engine , characterized in that said overflow port of said first combustion chamber and said overflow port of said second combustion chamber are at least substantially located on a path of shortest distance between said first combustion chamber and said second combustion chamber at positions that straddle said path of shortest distance between said first combustion chamber and said second combustion chamber , and in that said overflow ...

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Номер записи: 100