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JP6873777B2 |
To provide a joining method of metal members capable of obtaining a joint metal member excellent in quality by joining a first metal member and a second metal member highly accurately, and to provide a joint metal member.A first position...
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JP6868412B2 |
A sliding member includes a base substrate and a coating layer formed on the base substrate. The coating layer includes a copper alloy part derived from a plurality of precipitation hardening copper alloy particles. The copper alloy part...
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JP6868559B2 |
To prevent the removal of a valve stem seal due to an increase in back pressure, to easily assemble the valve stem seal to a valve guide, and to reduce the installation space for the valve stem seal. A valve stem seal (2) hermetically se...
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JP6871361B2 |
Disclosed is a copper-infiltrated valve seat insert of an iron-base sintered alloy having a two-layer structure formed by integrating a functional member side layer and a supporting member side layer across a boundary, and the thermal co...
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JP6868448B2 |
To further improve the retention performance of a valve stem seal with respect to a valve stem guide.In a valve stem seal 11 having a metal ring 21 fit to a valve stem guide 61, and a seal lip 32 held by the metal ring 21, and slidably c...
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JP6861518B2 |
To improve anti-knocking performance of an internal combustion engine.An internal combustion engine 1 includes a combustion chamber 44 that is demarcated by a cylinder internal circumferential surface 11 demarcating a cylinder 12, a cyli...
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JP2021060023A |
To prevent respective sections which perform opening and closing operation in an engine valve structure from being subject to high temperature by inhibiting heat transfer thereto and thereby controlling abrasion thereof.An engine valve s...
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JP2021060024A |
To enable a simple heat transfer shielding configuration to prevent heat due to a combustion temperature of an internal combustion engine received and accumulated in a valve head of an intake valve from transferring to other members from...
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JP6859942B2 |
In the specified cylinder, the heat shield film is formed on the top surface of the piston, the surface of the parachute part of the exhaust valve, and the wall surface of the exhaust port. On the other hand, in cylinder other than the s...
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JP2021050636A |
To provide a valve structure capable of inhibiting a sliding surface from being fastened by rust etc., and to provide an internal combustion engine.A valve structure includes: a poppet valve which opens or closes at least one of an exhau...
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JP2021042825A |
To improve durability.A valve stem seal 1 as a sealing device is equipped with a reinforcing ring 10 that is annular around an axis x, and an elastic body portion 20 that is formed by an elastic body attached to the reinforcing ring 10 a...
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JP6838709B2 |
This component for internal combustion engines comprises: a heat-resistant coating film that covers the surface of a base material; and an oil repellent coating film which is arranged on the heat-resistant coating film, and which has a h...
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JP2021025469A |
To improve combustion stability in a cylinder of an internal combustion engine.An internal combustion engine 1 has two intake valves 10 in one cylinder. In the cylinder deteriorated in combustion stability due to generation of swirl flow...
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JP2021017828A |
To provide a valve structure which can prevent a slide surface from seizing due to rust or the like, and an internal combustion engine.A valve structure includes a poppet valve which opens/closes a port in at least one of exhaust or inta...
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JP2021017829A |
To provide a valve structure which can prevent a slide surface from seizing due to rust or the like, and an internal combustion engine.A valve structure includes a poppet valve which opens/closes a port in at least one of exhaust or inta...
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JP2021017825A |
To provide a valve structure which can prevent a slide surface from seizing due to rust or the like, and an internal combustion engine.A valve structure includes a poppet valve which opens/closes a port in at least one of exhaust or inta...
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JP6827683B2 |
To provide an iron-based sintered alloy-made valve sheet for internal combustion engine having excellent abrasion resistance and excellent dropout resistance, and a manufacturing method therefor.There is provided a valve sheet having a s...
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JP6818978B2 |
To provide a repair method for an exhaust valve rod, capable of maintaining high-temperature strength of a seat surface, securing sufficient heat resistance and corrosion resistance, and reducing damage for repair work.An exhaust valve r...
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JP6821521B2 |
To provide an engine capable of suppressing the agglutination of a valve stem into a valve guide, and to provide the valve guide, and a manufacturing method for the valve guide.An in-guide recessed part 3b includes an in-tip recessed por...
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JP6815706B2 |
To provide an engine capable of suppressing the agglutination of a valve stem into a valve guide, and to provide the valve guide and a manufacturing method for the valve guide.A slide guide surface 3a includes an in-tip guide face 6a pro...
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JP2021004571A |
To improve heat radiation performance without enlarging a size, in a valve which is formed into a hollow structure, and sealed with sodium therein as a heat exchange medium.A hollow part is formed at least at a valve stem 1, and sodium 5...
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JP6804396B2 |
To provide an engine capable of suppressing the agglutination of a valve stem into a valve guide, and to provide the valve guide, and a manufacturing method for the valve guide.A slide guide surface 3a includes an in-tip guide face 6a pr...
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JP2020200848A |
To simplify a manufacturing step of a poppet valve.A housing 11 in a poppet valve 10 becomes cylindrical as a whole. Therefore, an inner space of the housing 11 becomes an inflow passage 12, a circulation space 13, and an outflow passage...
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JP6797482B2 |
The invention provides a valve apparatus of an engine, a valve guide cylinder, and a method of making the valve guide cylinder, by which adhesion of a valve shaft in the valve guide cylinder can be inhibited. Between a top end large diam...
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JP2020190278A |
To provide a valve-stem seal improved in mounting workability of a reinforcement ring to a valve steam guide, while stably fixing the reinforcement ring to the valve stem guide.In a process of mounting a cylindrical portion 110 on a valv...
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JPWO2019131015A1 |
The sealing device includes an elastic ring formed of an elastic material and a rigid ring formed of a rigid material that reinforces the elastic ring. The elastic ring has a lip that slidably contacts the outer peripheral surface of the...
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JP6786597B2 |
A method and a device for the production of an internally cooled inlet or outlet valve for internal combustion engines, together with the resultant valve includes provision of a workpiece, which has a cylindrical stem and a cylindrical h...
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JP6785986B2 |
Various embodiments include a method for detecting deviations occurring in the valve drive of an internal combustion engine comprising: measuring dynamic pressure oscillations of intake air in an air intake tract of respective internal c...
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JP6779585B2 |
To provide an engine capable of suppressing the agglutination of a valve stem into a valve guide, and to provide the valve guide, and a manufacturing method for the valve guide.A slide guide 3a includes an in-tip guide face 6a provided i...
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JP2020169591A |
To provide a valve structure of an engine that can suppress transversal stress acting on a valve spring to follow the valve spring even at high speed rotation.A valve structure of an engine comprises: a cotter mounted between a retainer ...
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JP2020169631A |
To suppress a resonance phenomenon of a spring included in a valve gear.A valve gear includes: an intake valve 18 including a valve stem 32 fitted to a cylinder head so as to be freely slidable and an umbrella part continuing to the valv...
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JP2020169586A |
To provide a valve gear for an engine capable of removing particulate matters such as soot deposited on a valve stem part throughout the whole periphery of the valve stem part using a valve guide by actualizing easy rotation of a valve w...
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JP6768944B2 |
Various embodiments include a method for identifying valve stroke phase differences during operation comprising: measuring dynamic pressure oscillations in the air intake tract; generating a corresponding signal; acquiring a crankshaft p...
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JP2020165336A |
To provide an internal combustion engine in which strong tumble flow can be created.A center line of an intake port 4 is directed toward a lower portion of an exhaust port 5 at an upper portion of a cylinder bore 1. Accordingly, it can c...
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JP2020159225A |
To prevent interference with a valve retainer even if a protrusion for keeping the contact angle of a seal lip constant is provided at the side of the valve retainer with respect to the seal lip.An annular inner elastic body 131 that is ...
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JP2020153235A |
To secure tumbling required for lean combustion while suppressing the blowback of intake causing knocking, to improve a fuel consumption rate.An internal combustion engine is an in-cylinder direct-injection spark-ignition internal combus...
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JP6760889B2 |
To provide an engine capable of suppressing the agglutination of a valve stem into a valve guide, and to provide the valve guide, and a manufacturing method for the valve guide.A slide guide surface 3a includes an in-tip guide face 6a pr...
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JP6757100B2 |
To provide an engine intake port structure that can appropriately strengthen a tumble flow while reducing manufacturing costs.An engine intake port structure A comprises an intake port 2 provided at an angle inclined with respect to a ce...
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JP2020143603A |
To use a component which is common to a valve stem having a different diameter as a fastener for fixing a valve spring to the valve stem.A valve structure of an engine comprises: a valve member 10 having an umbrella part 12 at one end of...
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JP2020527662A |
The present invention relates to a method of manufacturing an internal cooling valve, at least partially cylindrical by using a male mold for hot working and a step of providing a semi-finished product (2) having at least a partially cyl...
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JP2020143601A |
To easily and reliably attach a retainer to a valve stem.A valve structure of an engine comprises: a valve member having an umbrella part at one end of an axial valve stem in an axial direction; a valve spring supported to the engine at ...
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JP6752887B2 |
Provided is a valve seat which has high resistance to falling out. A valve seat which is used by being press fitted into a light metal alloy cylinder head of an internal-combustion engine includes, in at least one site on an outer periph...
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JP6753821B2 |
To provide an engine capable of suppressing the agglutination of a valve stem into a valve guide, and to provide the valve guide, and a manufacturing method for the valve guide.A slide guide surface 3a includes an in-tip guide face 6a pr...
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JP2020118062A |
To easily attach a cotter and a retainer to a valve system.A valve structure comprises a valve member 10 having an umbrella part 12 at one end of an axial valve system 11, and a retainer 30 attached to an external periphery of the other ...
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JP6737149B2 |
To facilitate designing a seat surface.An engine includes: an exhaust passage 144 opened inside a seat surface 192; and an exhaust valve 146 having a valve element 160 with a back surface 166 provided with an abutment part 168 abutting o...
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JP6736227B2 |
To provide an assemblage between an iron-based sintered alloy valve seat for internal combustion engine having excellent wear resistance and a valve seat having excellent wear resistance and a valve.An iron-based sintered alloy valve sea...
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JP2020110835A |
To provide a laser clad processing method which can prevent occurrence of quality defects at the beginning of laser clad processing.A laser clad processing method supplies metal powders P to a processing site 2 for forming a valve seat o...
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JP2020111788A |
To provide a combination structure of a valve seat and an engine valve, capable of suppressing an abrasion by a contact of the valve seat and the engine valve.In a combination structure of a valve seat and an engine valve having contact ...
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JP6729461B2 |
A first metal powder is supplied to a substrate to form a beginning part of a clad layer. After the beginning part is formed, the second metal powder is supplied to the substrate. A concentration of at least one of Si, Ni, Mo, and Al in ...
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JP6727728B2 |
To provide an engine capable of suppressing the agglutination of a valve stem into a valve guide, and to provide the valve guide, and a manufacturing method for the valve guide.A slide guide surface 3a includes an in-tip guide face 6a pr...
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