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JP6722105B2 |
The invention relates to a valve guide manufactured by a powder-metallurgical process for combustion engines, said guide comprising a central section, a cam-side end piece, and a duct-side end piece, wherein the central section consists ...
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JP2020520411A |
The present invention relates to parts manufactured by powder metallurgy in the form of valve guides or valve seat rings having an iron-based matrix containing an inorganic solid lubricant, the matrix being in the range of 75-90% of the ...
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JP2020517830A |
The present invention relates to a method for manufacturing a poppet valve or a mushroom valve, which comprises a step of providing a mixture of a metal powder and a binder, a step of filling a mold with the mixture and pressurizing it t...
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JP2020090954A |
To provide a valve stem seal which inhibits wear of a spring retainer caused by high load and minute rotation of a valve spring to improve durability.A valve stem seal 100 includes: a reinforcement ring 110 provided at the outer peripher...
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JP2020084873A |
To suppress the generation of a quality defect of a product.In a manufacturing method of an engine valve for forming a valve seat groove part 42 at a portion being a valve face of a valve main body, and building up a buildup powder mater...
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JP2020084781A |
To provide a sealing structure which can suppress the generation of wear caused by a spring at an outward flange part of a metal ring.A sealing structure comprises: a valve stem 410; a valve stem guide 320 for guiding the valve stem 410;...
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JP6702795B2 |
To inhibit generation of rust due to a nitrided layer of an umbrella surface of an umbrella part in an engine valve formed with a nitrided layer covering the umbrella surface and an umbrella reverse surface of the umbrella part of a valv...
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JP6703740B2 |
To secure lubrication between a valve stem and a valve guide while improving fuel economy by reducing a fastening force of the valve stem.A valve stem seal (1) seals a valve stem which makes a cylinder and a port communicate with each ot...
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JP2020076331A |
To prevent uneven wear from occurring at an umbrella part of a valve member and an edge of a vale hole on a port side.A valve structure comprises: a valve member 10; a valve spring 30 connected to the valve member 10 via a cotter 20 and ...
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JP2020076351A |
To improve operation efficiency of an engine by suppressing compression loss in a stopped cylinder, in the engine capable of performing reduced-cylinder operation.An engine includes a cylinder head 12, a plug member 42, a rod 41, a press...
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JP6689685B2 |
A valve seat ring and a method for producing the same may include a first material and a second material. The first material may be composed of approximately 15 to 30% by weight of Mo, approximately 5 to 30% by weight of chromium, approx...
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JP2020063717A |
To provide an internal combustion engine including heating means which can heat fuel more effectively.An internal combustion engine 100 has an electric heater 30 having a profile conforming to an inner wall surface of an intake pipe 12. ...
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JP2020063731A |
To solve the problem that: although a conventional cylinder oil lubrication device often performs timing lubrication when a piston is at a specific position in an engine stroke, it is difficult to accurately lubricate the piston always m...
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JP6685860B2 |
To provide an engine valve capable of suppressing the temperature rise of the engine valve and also suppressing heat transfer from an umbrella part to a shaft part to suppress a deterioration in the intake efficiency of an engine.An engi...
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JP6683278B2 |
To provide an engine which enhances a tumble flow by adding a contrivance to a shape of a downstream end part of a valve seat-less intake port, and can suppress the generation of knocking without increasing a fuel amount in, particularly...
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JP6681782B2 |
To provide a rocker arm falling prevention mechanism not applying any influence against operation of the rocker arm and capable of positively preventing the rocker arm from being fallen even if an overspeed rotation of an engine occurs.T...
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JP2020056354A |
To automatically detect an abnormality of a two-stage type hydraulic actuator.In an operation monitoring system for a hydraulic actuator 72, a monitoring unit comprises a first sensor 55, a second sensor (namely a second upper sensor 56 ...
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JP6677085B2 |
To provide a laser processor capable of changing flexibly a light intensity distribution at a processing point by a simple constitution, and controlling easily heat input into a workpiece; and to provide a laser processing method, an opt...
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JP6678670B2 |
A method for producing at least one hollow valve for gas exchange may include introducing a bore into a valve shaft and into a valve head to form the at least one hollow valve, measuring a depth of the bore, washing the at least one holl...
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JP6677005B2 |
To provide a valve stem seal which can suppress the come-off of the valve stem seal from a valve stem guide, and a seal structure.A valve stem seal 100 comprises a reinforcing ring 110 and a seal main body 120, and the seal main body 120...
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JP6675370B2 |
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 N...
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JP2020041486A |
To be able to improve gas flow in the combustion chamber while restricting increase in the weight of an exhaust valve.An exhaust valve structure of engine comprises: a suction port 5 and an exhaust port 7 connected to the engine combusti...
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JP6658702B2 |
To provide an internal combustion engine which easily introduce a directive gas at a high flow rate into a combustion chamber.An internal combustion engine 1 comprises: a cylinder head in which an intake port 21 communicating to a combus...
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JP6655144B1 |
To provide a method for improving corrosion resistance of a cylinder cover capable of effectively preventing corrosion of a seal region. The port is an air supply port or an exhaust port, and a valve seat ring is inserted into the port t...
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JP6653050B1 |
Providing a hollow poppet valve for exhaust that has a simple structure and exhibits a cooling effect equal to or better than that of a hollow umbrella valve when the engine is rotating at low to medium speeds. It has a neck part (3), a ...
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JP6650390B2 |
An intake valve 10 of an internal combustion engine, eg a gas-fuelled engine, has an uneven portion 14 formed on a flared slope portion 12 having a slope which gradually expands from the valve stem (11, fig.1) toward the valve seat porti...
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JP6636836B2 |
To stabilize an injection of fuel, and realize stable combustion, in a direct-injection type engine.A combustion chamber structure 1 of a direct-injection type engine includes: a piston head 31 formed with a cavity 31x having an inner wa...
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JP6638308B2 |
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JP2020012430A |
To prevent abnormality in operation of a valve mechanism.An exhaust valve mechanism disposed on a cylinder of an engine, includes a valve rod extended in a prescribed moving direction, and a slide supporting portion supporting the valve ...
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JP2020007990A |
To solve the problem that horizontal eddy of suctioned air revolving in a direction orthogonal to an axial direction of a cylinder occurs in the cylinder.A suction valve 40 comprises a valve body 41 for closing an opening of a suction po...
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JP6628205B2 |
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JP2019214972A |
To suppress valve bounce without increasing friction of an engine.A valve gear 10 of an engine includes a rocker arm 20 oscillatably supported by a supporting portion 11 of a cylinder head, a valve member 5 composed of a material includi...
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JP2019536896A |
Provided are sintered materials used for valve seat inserts and the like in internal combustion engines. The material comprises a pressurized base powder metal mixture and a Cu-rich phase infiltrated into the pores of the base powder met...
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JP2019214994A |
To provide a poppet valve keeping sealing performance between an upstream side and a downstream side of an exhaust gas recirculation pipe while the poppet valve is closed, by suppressing sticking of foreign matters to a region where a va...
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JP6609124B2 |
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JP6608390B2 |
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, subject...
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JPWO2018163245A1 |
This uniflow scavenging two-stroke engine is a uniflow scavenging two-stroke engine in which the exhaust gas in the cylinder is pushed out from the exhaust port (142) by the scavenging air flowing in from the scavenging port. It includes...
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JP6602737B2 |
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JP2019531433A |
Thermal barriers for engine component surfaces are disclosed. The thermal barrier contains multiple modules, each module with a shield. The edges of at least one shield are spaced from the edges of adjacent shields in the array.
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JP2019190402A |
To provide a valve mechanism of an internal combustion engine which inhibits deterioration of fuel consumption and enables improvement of sealability of a combustion chamber.A valve mechanism 16 includes: a valve 43 slidably provided at ...
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JP6597663B2 |
An engine valve for an internal-combustion engine includes: a head part including a main surface facing a combustion chamber of the internal-combustion engine and a valve face coming in contact with a valve seat; a stem part extending al...
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JP6591881B2 |
A device for producing at least one hollow valve for a gas exchange system may include at least one valve holder. The at least one valve holder may include a valve stem centring element, a valve receptacle and a valve head holder. The va...
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JP2019526737A |
A segmented thermal barrier for the surface of the combustion chamber of an internal combustion engine is disclosed. The segmented thermal barrier comprises multiple modules, each with a support and a shield. The edges of the shields of ...
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JP2019157740A |
To provide an engine component of which a heat insulation layer has high heat insulation property and good adhesion property to a base material.The engine component includes the metal base material, and the heat insulation layer provided...
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JP2019157744A |
To provide an engine component of which a heat insulation layer has high heat insulation property and good adhesion property to a base material.The engine component includes the metal base material having a surface where a plurality of p...
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JP6577763B2 |
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JP6575606B2 |
A valve stem seal with significantly improved sealing performance while improving workability when fitting the valve stem seal to a valve stem guide.An inner peripheral surface of a fitting section (20B) is provided with a plurality of a...
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JP2019152191A |
To provide a valve gear of an internal combustion engine capable of attaining both of securement of startability and suppression of deterioration of fuel economy.A valve gear of an internal combustion engine having three or more cylinder...
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JP2019143512A |
To provide a valve mechanism for an engine which improves removability of a core after casting of a cylinder head and achieves improvement of cooling effect of a suction/exhaust valve and downsizing of the cylinder head.A valve mechanism...
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JP2019143558A |
To reduce an unburned rate of fuel.An intake valve 18 is disposed between a combustion chamber provided in an engine and an intake port for supplying a fuel gas to the combustion chamber. A valve body 18m is made of a raw material that i...
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