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8183754 |
Alumina-based sintered body for spark plug and method of manufacturing the same, and spark plug and method of manufacturing the same
An alumina-based sintered body for a spark plug having enhanced mechanical strength and a method of manufacturing the same, as well as a spark plug having the alumina-based sintered body for a...
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8167673 |
Method for manufacturing a spark plug having a laterally oriented ground electrode
A method for manufacturing a spark plug having a central electrode and a ground electrode, the central electrode and the ground electrode being spaced apart from each other and a first planar...
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8128446 |
Method for manufacturing a spark plug insulator including steps for forming a through hole therein
A method for manufacturing an insulator for a spark plug is provided. The method includes: a preparing step; a press pin arranging step; a powder filling step after the press pin arranging step; a...
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8106572 |
Spark plug and process for producing the spark plug
A spark plug in which an ignition portion of a ground electrode formed through joining of a noble metal chip to the ground electrode has high durability, and a method of manufacturing the spark plug.
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8102106 |
Spark plug and method of manufacturing the same
A spark plug having a ground electrode that includes a press-formed recess portion comprised of a first portion with which a working pin has come into contact, and a second portion with which the...
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8098004 |
Method for producing spark plug and spark plug
A spark plug (100) including a center electrode (130) and a ground electrode (140), which is formed by joining a ground electrode chip (143) to a ground electrode base material (141) via an...
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8092269 |
Method of manufacturing spark plug
A decrease in yield and degradation of productivity can be avoided when a spark plug having an insulator with low mechanical strength is manufactured. In a second process, a terminal electrode 15...
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8087961 |
Method of producing a spark plug that has a high dimensional accuracy in the spark gap
For producing a spark plug that has a high dimensional accuracy in the spark gap, a method is disclosed which comprises (a) preparing a semi-finished spark plug unit (100b) which comprises a center...
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8052495 |
Method for producing spark plug by projection welding and spark plug thereof
A spark plug (100) including a center electrode (130) and a ground electrode (140), which is formed by joining a ground electrode chip (143) to a ground electrode base material (141) via an...
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8053965 |
Combination igniter and sensor for an internal combustion engine
An igniter for an internal combustion engine, the igniter comprising: a center electrode; an insulator disposed about the center electrode; a ground shield disposed about the insulator, the...
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8033880 |
Method for manufacturing spark plug
A method for manufacturing a spark plug which includes: (a) preparing a metal shell; (b) preparing an insulator; (c) inserting the insulator in an insertion hole of the metal shell; (d) forming an...
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8030830 |
Iridium alloy for spark plug electrodes
A spark plug comprises a shell having a substantially cylindrical threaded portion for threadable engagement in a cylinder head of an internal combustion engine, an insulator disposed coaxially in...
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8026654 |
Ignition device having an induction welded and laser weld reinforced firing tip and method of construction
An ignition device for an internal combustion engine and method of construction therefore includes a housing with an insulator secured therein. A center electrode is mounted within the insulator. A...
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8013503 |
Spark plug for internal combustion engine having ground electrode with thick, thin and stepped portion and method for producing the spark plug
A spark plug including: a ground electrode including a thick portion provided on a base end side, a thin portion provided on a distal end side, and a stepped portion provided on an inner peripheral...
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8013504 |
Spark plug for internal combustion engine and method for producing the spark plug
A spark plug including: a center electrode; a substantially cylindrical insulator; a cylindrical metal shell; a ground electrode having a base end joined to a leading end portion of the metal shell...
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7980908 |
Spark plug and method for production of a spark plug
The invention describes a spark plug having an outer electrode (12), a central electrode (10), an inner conductor (2) connected to the central electrode (10) and an insulator (3) enclosing the...
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7959482 |
Manufacturing method for ignition plug involves removing leading end portion of shell extended from end surface of insulator
A manufacturing method for an ignition plug is provided. The method includes: preparing an insulator having a cavity provided at a leading end portion thereof by disposing a leading end of the...
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7944135 |
Spark plug and methods of construction thereof
A spark plug and method of construction is provided, wherein the spark plug has a generally annular ceramic insulator and a metal shell surrounding at least a portion of the insulator. A ground...
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7938706 |
Deflection inspecting device for spark plug insulator, deflection inspecting method for spark plug insulator, and manufacturing method for spark plug insulator
A device for inspecting a spark plug insulator for bending, the spark plug insulator including a cylindrical body having a radially enlarged flange at an axially intermediate portion thereof, and a...
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7922551 |
Pre-chamber spark plug
A method and apparatus to maximize spark plug life in pre-chamber spark plugs operating with ultra-lean mixtures and/or elevated engine BMEP is presented. Electrode erosion is reduced by spreading...
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7914353 |
Spark plug and method for manufacturing the same
A method for manufacturing a spark plug and a spark plug manufactured by the method in which a gasket used for securing the air-tightness when mounting the spark plug on an internal-combustion...
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7901262 |
Spark plug manufacturing method ensuring accurate and effective adjustment of spark gap
A method of manufacturing a spark plug includes the step of adjusting a spark gap in the spark plug. In the step, a ground electrode is repeatedly pressed, by a hammer, toward a center electrode....
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7896720 |
Method of producing spark plug, and spark plug
A method of producing a spark plug includes reducing the diameter of a center electrode while maintaining the heat dissipation property of the center electrode. A columnar member in which an outer...
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7893604 |
Spark plug with stream shaper to shape tumble vortex into desired stream in combustion chamber
A spark plug for an internal combustion engine is provided which includes a hollow cylindrical metal shell with an open end portion to be exposed to a combustion chamber of the engine, a ground...
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7851984 |
Ignition device having a reflowed firing tip and method of construction
A sparkplug having ground and/or center electrodes that include a firing tip formed by reflowing of an end of wire having an opposite end carried by a feed mechanism. The present invention also...
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7839065 |
Plasma jet spark plug and manufacturing method therefor
A plasma jet spark plug and a manufacturing method therefor are disclosed. In a state in which a noble-metal chip having a flange-like outwardly projecting portion is disposed in a communication...
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RE41944 |
Method for manufacturing noble metal electric discharge chips for spark plugs
In a wire drawing process for forming a wire rod containing iridium as a main component and which further contains nickel and at least one of platinum, rhodium and ruthenium, and having a...
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7795790 |
Spark plug electrode and process for making
A spark plug and method for making. The spark plug comprises a center electrode, an insulator surrounding the center electrode, and a metallic shell surrounding the insulator. The spark plug also...
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7740513 |
Method and device for manufacturing a noble metal armored electrode for a sparking plug
Method and device for manufacturing a noble meal reinforced electrode for a spark plug. A base electrode element (1) is formed and positioned in a retaining attachment (2). A noble metal piece (3)...
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7741762 |
Dual-spark pre-chambered spark igniter
A dual-electrode spark igniter (spark plug), which has two electrodes extending from the plug body. During a spark event, electricity flows across a first spark gap from a first electrode to a...
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7666047 |
Method for securing a metal noble tip to an electrode of a spark plug using a resistance and laser welding process
There is provided a method for producing a spark plug in which welding strength between a noble metal tip and an electrode joined by laser welding can be restrained from becoming weak. A noble...
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7637793 |
Spark plug and method for producing it
A spark plug for an internal combustion engine, the spark plug having at least two electrodes, in which the electrodes are formed of a first part made of a substrate material and a surface part...
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7581998 |
Method for regulating aground electrode position in spark plug
A method and apparatus for manufacturing a spark plug, the spark plug being defined herein, the method including a center electrode position measuring step of measuring an X-directional position of...
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7557495 |
Spark plug having precious metal pad attached to ground electrode and method of making same
A spark plug having a ground electrode with a precious metal pad welded to the ground electrode through a series of weld steps. The precious metal pad is a Pt-based pad which is attached to a side...
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7554253 |
Spark plug with increased durability and carbon fouling resistance
A spark plug for an internal combustion engine is provided which includes a metal shell, a porcelain insulator, a center electrode, a main ground electrode, and auxiliary ground electrodes. Each of...
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7550906 |
Spark plug having a noble-metal chip and method for manufacturing the same
A noble-metal chip (30, 90) joined to at least either a center electrode or a ground electrode, the center and ground electrodes forming a spark discharge gap, and having a circumferential edge of...
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7521850 |
Spark plug with multi-layer firing tip
A spark plug having a multilayer firing tip that minimizes the amount of precious metal used and a method of assembling a spark plug with a multilayer firing tip. The firing tip includes a...
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7483562 |
Method of detecting protrudent adhered matters and method of making spark plug using the same
Protrudent matters caused by connecting metallic materials are detected with high precision and in turn offer products of high quality, and an increase of yield. The invention sets an allowable...
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7477006 |
Spark plug for internal combustion engine and method of manufacturing the same
A spark plug for an internal combustion engine includes: a cylindrical insulator as defined herein; a center electrode as defined herein; a cylindrical metal shell as defined herein; and a ground...
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7449824 |
Spark plug
A spark plug is provided with a metal shell and a ceramic insulator to support therein a center electrode. The ceramic insulator includes a front portion with a stepped outer surface, a middle...
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7385339 |
Ignition device having a reflowed firing tip and method of making
A sparkplug having ground and center electrodes that include a firing tip formed from a noble metal or noble metal alloy by reflowing of a noble metal preform. The present invention also includes a...
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7346983 |
Method for manufacturing spark plug
A spark plug is provided, for a provisional bending process for manufacturing the spark plug, as a work in a condition where an earth electrode is straight and substantially in parallel with an...
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7323810 |
Spark plug for an internal combustion engine
A spark plug for an internal combustion engine comprising a centre electrode and an earth electrode serving as a spark discharge section, as well as a noble metallic chip, which is inserted into...
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7306502 |
Spark plug with noble metal chip joined by unique laser welding and fabrication method thereof
A spark plug is provided which ensures the reliability of a weld between a noble metal chip and a ground electrode as well as higher durability and ignitability of fuel. The ground electrode is...
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7261609 |
Spark plug manufacturing apparatus and method of manufacturing spark plug
The spark plug manufacturing apparatus includes a holding plate formed with a plurality of mounting holes penetrating from a front surface to a rear surface thereof for holding therein hollow...
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7224110 |
Starting element having ceramic component electrostatically coated with a dry glaze
A method for manufacturing a starting element, in particular a sheathed-element glow plug, for the combustion process in an internal combustion engine having a ceramic element (1, 3) is proposed,...
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7192324 |
Method for producing a spark plug electrode
A method of joining an electrode of a spark plug with a noble metal is described, the noble metal being joined locally with the electrode using a thermal input produced by a continuously operating...
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7172483 |
Method of making metallic shell for spark plug, method of making spark plug having metallic shell and spark plug produced by the same
A method of making a metallic shell for a spark plug. The metallic shell includes a multi-stepped through hole, an intermediate tubular portion, a tip end side tubular portion and a base end side...
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7132782 |
Spark plug and method of producing spark plug
A spark plug includes a center electrode, a ground electrode opposing the center electrode in such a manner as to define a spark discharge gap between the center electrode and the ground electrode,...
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7131191 |
Method for manufacturing noble metal electric discharge chips for spark plugs
In a wire drawing process for forming a wire rod containing iridium as a main component and which further contains nickel and at least one of platinum, rhodium and ruthenium, and having a...
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