ПОДВИЖНЫЙ ПЕРЕГОРОДОЧНЫЙ ЭЛЕМЕНТ В ВИДЕ ВЫПУСКНОГО КЛАПАНА ИЛИ ПОРШНЯ В ДВИГАТЕЛЕ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к области двигателестроения и позволяет повысить долговечность выпускного клапана и поршня за счет использования коррозионно-стойкого при высоких температурах покрытия. Подвижный перегородочный элемент в виде выпускного клапана или поршня в двигателе внутреннего сгорания на стороне перегородочного элемента, обращенной к камере сгорания, покрыт коррозионно-стойким при высоких температурах материалом, изготовленным из зернистого исходного материала из сплава, содержащего никель и хром, который с помощью процесса горячего изостатического прессования был преобразован в плотный (когерентный) материал, по существу, без расплавления исходного материала. Коррозионно-стойкий материал имеет твердость менее 310 HV, измеренную при приблизительно 20°С после того, как произвели нагрев материала до температуры 550-850°С и выдерживание его при данной температуре более 400 ч. 13 з.п. ф-лы, 2 ил., 2 табл.

Поршень двигателя внутреннего сгорания

ПОРШЕНЬ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ, содержащий головку и корпус, в котором выполнено центральное отверстие с верхним и нижним торцами, причем головка и корпус сопр жены между собой по кольцевой конической поверхности и св заны при помощи ст жного болта с гайкой, размещенного в центральном отверстии корпуса с упором гайки в нижний торец отверсти  корпуса, о т л и - чающийс  тем, что, с целью повышени  надежности, вершина образующей конической понерхности сопр жени  головки и корпуса расположена в точке пересечени  плоскости нижнего торца центрального отверсти  корт пуса с вертикальной осью симметрии поршн . . О) ф сю ел THE PISTON OF THE INTERNAL COMBUSTION ENGINE, comprising a head and a housing in which a central opening with upper and lower ends is made, the head and the housing being coupled to each other along an annular conical surface and connected with a tension bolt with a nut placed in the central opening of the housing with pressing the nut to the lower end of the body opening, which is due to the fact that, in order to increase reliability, the top of the generatrix of the conical interface between the head and the body is located at the intersection point of the plane lower pole end of the central opening Pusa court with a vertical axis of symmetry of the piston. . O) f su su

Tauchkolben für Verbrennungsmotoren

Kolbenanordnungs-Haltevorrichtung

LEICHTMETALL-REGELKOLBEN

VERBUNDKOERPER, AUS TEILEN MIT VERSCHIEDENEN THERMISCHEN AUSDEHNUNGSKOEFFIZIENTEN UND VERFAHREN ZUM VERBINDEN DIESER TEILE.

KOLBEN MIT FLUESSIGKEITSKUEHLUNG.

Producing dimensionally accurate components with nitrided or nitrocarburized surface layers, and resultant component

The finished components are hardened and subsequently tempered at temperatures of only 200-300 deg C, contrary to the usual practice. The hardened and tempered components are brought to the required dimensions by further machining, and are then subjected to nitriding or nitrocarburizing.

KOLBENPUMPENKOPF EINER HOCHDRUCKKOLBENPUMPE

Aus Keramik und Metall zusammengesetzter Körper mit einer Reibschweissverbindung und mit einem keramischen Einsatz gegossener Kolben.

Verbundmetallkolben

KOLBEN-KOLBENBOLZENBAUGRUPPE

Wasserkraftanlage

Es wird eine Wasserkraftanlage mit einem als S-Rohr ausgestalteten Strömungskanal (40) mit einem ersten, zweiten und dritten Abschnitt (100, 200, 300) vorgesehen. Der Strömungskanal (40) weist im ersten Abschnitt (100) einen ersten Durchmesser (400) und eine erste Mittellinie (410) und im dritten Abschnitt (300) einen zweiten Durchmesser (500) und eine zweite Mittellinie (510) auf. Zwischen der ersten und zweiten Mittellinie ist ein Abstand (600) vorgesehen. Die Wasserkraftanlage weist ferner Turbinenschaufeln (10) im ersten Abschnitt (100) und einen mit den Turbinenschaufeln (10) durch eine Welle (20) gekoppelten Generator (30) im dritten Abschnitt (300) auf. Der Strömungskanal (40) weist im Bereich des Generators (30) im Wesentlichen Stahl auf.

Hubkolben für eine Brennkraftmaschine

Verfahren und Vorrichtung zur Herstellung eines zweiteiligen Kolbens

VERFAHREN ZUM VERBINDEN EINER IN EIN AUS EINEM LEICHTMETALLWERKSTOFF GEGOSSENES BAUTEIL FUER BRENNKRAFTMASCHINEN EINGIESSBARE AUS EINEM KERAMIKWERKSTOFF BESTEHENDE EINLAGE

Kohlenstoffkolben für eine Brennkraftmaschine

Aus Kohlenstoff, insbesondere aus einem mittels einer Kohlenstoff-Mesophase hergestellten Graphit bestehender Kolben für eine Brennkraftmaschine, insbesondere für PKW und LKW, mit einem Kolbenboden (1), einem an den Kolbenboden axial anschließenden Feuersteg (2), einem Ringabschnitt (3) und einem Kolbenschaft (4) mit einer Kolbenbohrung (5) zur Aufnahme eines Kolbenbolzens, wobei die Schaftwand (42) auf der Schaftinnenseite zur Ausbildung der Nabe (5) einander gegenüberliegend Verdickungen (51) aufweist, die sich in die Kolbenboden-Unterseite (12) mit einer Rundung hineinerstrecken, dadurch gekennzeichnet, daß die Kolbenboden-Unterseite in dem Bereich zwischen den Nabenverdickungen (51) unabhängig von der Flächengestaltung der Kolbenboden-Oberseite eine Gewölbefläche (12) mit einer quer zur Achse der Nabenbohrung (5) gerichteten Krümmung bildet, wobei die Kolbenboden-Unterseite eine Torusfläche bildet, deren Achse parallel zur Achse des Kolbenbolzens liegt.

OELGEKUEHLTER, MEHRTEILIGER TAUCHKOLBEN FUER HUBKOLBENBRENNKRAFTMASCHINEN

Bewehrungsmaterial für Kolben von Verbrennungsmotoren

Austenitic cast iron with mainly vermicular and/or nodular graphite is useful as a reinforcing material intermetallically bound to the aluminium base material of the pistons of an internal combustion engine. This material provides improved binding solidity with the adjacent aluminium base material of which the piston is made. The reinforcing material can be composed of different layers.

COMPOSITE PISTONS

REINFORCEMENT OF PISTONS

PISTONS

METHOD FOR THE MANUFACTURE OF A COOLED ENGINE PISTON

PISTON FOR INJECTION-TYPE DIESEL COMBUSTION ENGINES ESPECIALLY DIESEL ENGINES

... 1316046 Pistons MASCHINENFABRIK AUGSBURG-NURNBERG AG 19 April 1971 [7 April 1970] 24290/71 Heading F2T [Also in Division F1] A piston has a combustion chamber wall formed as a ring-shaped insert 3, Fig. 1, and an intermediate member 5, e.g. of carbon, having zones of constant or different thermal conductivities is provided between the insert and the piston body to give a predetermined heat distribution pattern. The intermediate member may be formed from two ring-shaped bodies or with an interface extending intermediate the inner and outer side faces. Alternatively the thermal conductivity is arranged to decrease in an outwards direction from the inner face on the intermediate member in one piece with zones of different thermal conductivities. In a modification the insert has a re-entrant lip.

PISTON FOR INTERNAL COMBUSTION ENGINE

TWO-PIECE PISTON AND METHOD OF MANUFACTURING THE SAME

Piston valve for an engine brake device

PISTON FOR A DIRECT INJECTION DIESEL ENGINE

A part of the bowl 18 in the crown 12 of the piston is insulated, with the insulation being at the surfaces 24 towards which the injector jets 22 are aimed. The insulation helps to maintain a high temperature at these surfaces and thus to reduce the ignition delay. The insulation is provided by a cast iron, steel, titanium or ceramic cast-in annular insert 26 which may be integral with a ring support insert 28. ...

PISTONS

Low friction piston

A low-friction piston construction for use in an oil-fed cylinder bore with the piston skirt relieved to define lands that are coated with SFL (graphite, MoS2, BN, and a special expoxy resin). A method of making such piston construction including provision of asperities on the skirt wall onto which the SFL coating is thermally sprayed and formation of small pockets at the mouth of the asperities to additionally act as oil replenishing reservoirs. A method of using such piston construction in an engine which comprises provisions of a slightly increased gap between the piston and cylinder wall and formation of a transferred SFL coating from the piston to the cylinder wall resulting in two polished microsmooth mating coatings, each attractive to oil films.

PISTONS

FIBRE REINFORCED PLASTIC ARTICLE

In a method of manufacturing a fibre reinforced plastic article (14) having a coating (17) of a substance other than fibre reinforced plastic the coating is applied to a fibre preform which is subsequently impregnated with resin, the resin then being cured. The fibres may be of carbon, boron or glass and the coating is e.g. ceramic or metallic. The manufacture of a piston and of a gudgeon pin is described.

Engine combustion chamber insulating coatings

Heat engine piston and combustion chamber construction enclosing a gas combustion zone, comprising: a piston body having a crown facing said gas combustion zone; combustion chamber surfaces cooperating with said piston to complete enclosure of said zone; and a thermal diffusivity coating on said crown and combustion chamber surfaces having an effective thickness to operate as a thermal diode to restrict heat transfer to said piston body and combustion chamber and to restrict heat transfer to said combustible charge prior to combustion. A method of thermally managing heat generated by an internal combustion engine, the engine having combustion chamber walls for combusting a gaseous mixture of air and fuel, a cooling jacket for cooling said walls, and a piston moveable along a portion of said walls, comprising: increasing the compression ratio of the engine to induce engine-knock for an uncoated chamber; coating at least the crown of the piston of said combustion chamber walls with a low ...

Piston coolant gallery

FORGED PISTON WITH REINFORCED RING GROOVE

Securing and heat-insulating piston crown

A piston has a main body (1) and a crown (5) fitted to its head, with an air gap (8) between them over the central zone. Around the periphery there is a spacer ring (6) which creates this gap, and the ring itself has inner and outer ribs (11, 12) which form an annular channel and create a secondary air gap. The crown is secured by screws or bolts (7) extruding through its periphery, the spacer ring and a flange (14) around the top of the main body formed by an annular groove (15). Ring elements (17) seated in this groove have threaded apertures to receive the screws or bolts which thus clamp the piston head components together. ...

PISTONS

PISTON & CYLINDER APPARATUS

Piston lubrication and coolant path

PISTONS

Improvements in or relating to combustion catalysis

The internal walls, valves and head surfaces of pistons in internal combustion engines are coated with a ceramic catalytic crystalline coating formed by flame spraying a particulate mixture of 30 to substantially 100% (by weight) cerium oxide, 0,01-20% each of neodymium and praesodymium oxides and as optional ingredients one or more of aluminium, lanthanum, scandium, yttrium, thorium, niobium, tantalum and vanadium oxides. Aluminium may be added to the mixture to increase thermal conductivity of the coating; chromium or tungsten carbides may be added to resist abrasion. In practice the compositions may contain also phosphate, sulphate, lime, magnesia, silica and iron oxide as minor ingredients.

MULTI-PART PISTON FOR AN INTERNAL COMBUSTION ENGINE

... 1453328 Pistons MASCHINENFABRIK AUGSBURG-NURNBERG AG 4 Feb 1974 [15 Feb 1973] 05133/74 Heading F2T An I.C. engine piston has a head 1 and a lower part 2 with a gudgeon-pin bearing 25, on the underside of the piston head crown are two annular ribs 7, 8, concentric with the piston axis and having threaded holes 18, 19 for screws 16, 17 which clamp the ribs to sloping support webs 12, 13 of the lower part, the webs correspond to truncated cones 14, 15 having their apices on the piston axis, that of the outer web 13 being below the gudgeon pin axis. The height of the ribs 7, 8 is substantially equal to the depth of the holes 18, 19 and the screws 18, 19 are expansion screws with spacers 20, 21. The apex of the cone 15 of the inner web 12 lies above the piston crown. The webs 12, 13 are formed on an intermediate element 3 secured by screws 34 to the lower part 2. The element 3 has a disc-shaped base 11 and a tube 35 leads cooling oil from the gudgeon pin bearing, further oil passages 36 are ...

PISTONS

PISTON FOR AN INTERNAL COMBUSTION ENGINE

CONNECTING ROD FOR AN IC ENGINE

Process components, containers, and pipes suitablefor containing and transporting cryogenic tempera ture fluids.

PISTON FOR INTERNAL-COMBUSTION ENGINES

PROZESSKOMPONENTEN, BEHÄLTER UND ROHRE, GEEIGNET ZUM AUFNEHMEN UND TRANSPORTIEREN VON FLUIDEN KRYOGENER TEMPERATUR

LIFTING CYLINDER MACHINE

KOLBENKOPF MIT KÜHLKAMMER UND VERFAHREN ZUR HERSTELLUNG EINES SOLCHEN KOLBENKOPFES

VERFAHREN ZUR HERSTELLUNG EINES KOLBENKOPFES FÜR EINEN ZWEITEILIGEN KOLBEN SOWIE KOLBENKOPF FÜR EINEN ZWEITEILIGEN KOLBEN

KOLBENKOPF UND VERFAHREN ZUR HERSTELLUNG EINES KOLBENKOPFES

FUNCTION-OPTIMIZED ORGANIZATION OF THE PISTON RING FIELD RANGE WITH STEEL PISTONS

PISTON FOR INTERNAL-COMBUSTION ENGINES

PROCEDURE FOR THE PRODUCTION OF A PISTONHEAD FOR A TWO-PIECE PISTON AS WELL AS PISTONHEAD FOR A TWO-PIECE PISTON

PENDULUM PISTON ENGINE

PROCEDURE FOR THE IMPROVEMENT OF THE FRICTION OF A PISTON OF AN INTERNAL-COMBUSTION ENGINE AND A DEVICE FOR THE EXECUTION OF THE PROCEDURE.

LIAISON VEHICLE BETWEEN CERAMIC AND METALLIC CONSTRUCTION UNITS AND ITS USE.

MACHINE PARTS.

PISTON BUILDING GROUP.

Leichtmetallkolben for internal-combustion engines, in particular for diesel engines

LIFTING CYLINDER FOR AN INTERNAL-COMBUSTION ENGINE

Internal-combustion engine piston with base plate

BONDING A COMPONENT IN A PISTON

ENGINE PISTON ASSEMBLY AND FORGED PISTON MEMBER THEREFOR HAVING A COOLING RECESS

PISTONS WITH COMBUSTION BOWL INSERTS

Rotor blade for a wind energy installation

TWO-PIECE OIL-COOLED PISTON WITH THERMAL EXPANSION CONTROL

COMBUSTION SYSTEM FOR INTERNAL COMBUSTION ENGINE

Piston and piston sealing ring assemblies

Spark-ignition engine, flat and with opposite cylinders

OPPOSED PISTON ENGINE

METHOD FOR MANUFACTURING INTERNAL COMBUSTION ENGINE PISTONS

A piston production method produces an internal combustion engine piston. The method comprises forging a billet from an initial billet comprising an aluminum alloy that comprises silicon, intermetallic particles, and injected hardening particles, the forging is conducted under at least one of super- plasticity and hot deformation conditions; and heat treating the forged billet. The forging comprises forging at a temperature in a range from about 0.8 Tmelt to about 0.98 Tmelt. The forging also comprises forging at a STRAIN rate in a range from about 5x10-2 s-1 to about 5x10-5 s-1. The piston being formed with a configuration that enables other parts to be connected to the piston. The initial billet comprises at least one of: coarse grain silicon, intermetallic particles, and injected hardening particles having at least one of a lamellar, comprehensive shape, and fine grain silicon, intermetallic particles, and injected hardening particles being globular in shape. The silicon, intermetallic ...

COMPOSITE PISTON

PISTONS AND METHODS FOR THEIR MANUFACTURE

HYDROPOWER PLANT

The invention relates to a hydropower plant having flow channel (40) configured as an S-pipe, having a first, second, and third section (100, 200, 300). The flow channel (40) has a first diameter (400) and a first center line (410) in the first section (100), and a second diameter (500) and a second center line (510) in the third section (300). A distance (600) is provided between the first and the second center lines. The hydropower plant further has turbine blades (10) in the first section (100), and a generator (30) coupled to the turbine blades (10) via a shaft (20) in the third section (300). The flow channel (40) substantially comprises steel in the region of the generator (30).

TWO-PIECE OIL-COOLED PISTON WITH THERMAL EXPANSION CONTROL

INTERNAL COMBUSTION ENGINE

An internal combustion engine having a cylinder block made of a light-alloy with a cylinder wall around a cylinder bore including a cylindrical fiber-reinforced portion which is formed of a mixture of an alumina-based fiber and a carbon fiber with a light-alloy matrix. The alumina-based fiber has a fiber volume fraction set in a range of 8 to 20%, and the carbon fiber has a fiber volume fraction set in a range of 0.3 to 15%. The aluminba-based fiber contains 25% or less, by weight, of silica, has an average aspect ratio of 20 to 150, and an alpha rate of 2 to 60%. The carbon fiber has an average aspect ratio set in a range of 10 to 100 and a Young's modulus set in a range of 20 to 30 t/mm . The piston for the cylinder bore has an iron-plated layer covered by a tin-plated layer. The piston rings for the piston may by of austenitic stainless steel to provide thermal expansion characteristics similar to the cylinder wall and may be provided with a nitride or chromium-plated layer.

PISTON VALVE POCKET RELIEF

PRODUCTION OF PISTONS HAVING A CAVITY

COMPOSITE THERMAL SHIELD FOR ENGINE COMPONENTS

V-TYPE TWO-CYCLE ENGINE

Ungekühlter Kolben für Brennkraftmaschinen.

Keramisches Überzugsmaterial und seine Verwendung zur Herstellung keramischer, katalytisch wirkender, kristalliner Überzüge

Glasfadenmatte sowie Verfahren und Vorrichtung zu ihrer Herstellung

Leichtmetallkolben für Brennkraftmaschinen

Kolben und Verfahren zu dessen Herstellung

Leichtmetallkolben einer Kolbenbrennkraftmaschine

Kolben für Einspritzbrennkraftmaschinen, insbesondere Dieselmotoren

Piston de moteur à combustion interne

Kolben, insbesondere für Brennkraftmaschinen

BRENNKRAFTMASCHINENKOLBEN, INSBESONDERE FUER EINE DIESELMASCHINE, MIT EINEM UNTERTEIL UND EINEM MIT DIESEM LOESBAR VERBUNDENEN OBERTEIL.

Piston pour moteur à combustion interne

Kolben für Brennkraftmaschinen mit direkter Einspritzung

Kolbenstangendichtung einer Brennkraftmaschine

Brennkraftmaschinenkolben mit Bodenplatte

Verfahren und Vorrichtung zum Herstellen von Ringnuten und/oder des Laufflächenprofils am Dichtmantel eines Stahlkolbens von insbesondere Brennkraftmaschinen

Mit einer Beschichtung seiner Verbrennungsraum-Wandungen versehener Verbrennungsmotor und Verfahren zur Herstellung der Beschichtung

Steel piston with counter-bore design

A piston for an internal combustion engine is provided. The piston includes a piston body which is made of steel. The piston body has a crown portion with an upper combustion surface, a pair of skirts which depend from the crown surface, a pair of pin bosses for receiving a wrist pin and a plurality of pin boss bridges which extend from the pin bosses to the skirts. Each of the pin boss bridges extends axially to a lower end which is opposite of the crown portion and has a rib with an increased thickness at its lower end. At least one of the pin boss bridges has a generally flat counter-bore surface for providing a reference location for machining of the piston body.

High pressure pumping system

One or more techniques and/or systems are disclosed for a pump technology that provides for more effective and efficient transfer of liquids, such as petroleum products and components, to and through pipelines. Such a technology can comprise a type of external gear pump that creates higher flow, resulting in higher pressures in the pipeline, to move the liquids, while providing for longer pump life, simpler and less maintenance, and fewer undesired conditions, with a smaller footprint, in a cost-effective system.

LIGHTWEIGHT PISTON PIN AND METHOD FOR MANUFACTURING THE LIGHTWEIGHT PISTON PIN

A method for manufacturing a lightweight piston pin includes preparing a mixture of a base metal powder comprising chromium, carbon and iron, a TiC powder and a binder, metal powder injection molding (MIM) the mixture into a piston pin shape, degreasing the molded body to remove the binder from the mixture, sintering the binder-deprived, molded body, forming an intermediate layer composed of chromium carbide that surrounds the TiC powder in the sintered body, and transforming a matrix structure of the sintered body into a martensitic structure. 1. A method for manufacturing a lightweight piston pin , comprising:preparing a mixture of a base metal powder comprising chromium, carbon and iron, a TiC powder and a binder;metal powder injection molding (MIM) the mixture into a piston pin shape;degreasing the molded body to remove the binder from the mixture;sintering the binder-deprived, molded body;forming an intermediate layer composed of chromium carbide that surrounds the TiC powder in the sintered body; andtransforming a matrix structure of the sintered body into a martensitic structure.2. The method of claim 1 , wherein the intermediate layer-forming step is carried out by maintaining the sintered mixture of the sintering step at 1000˜1050° C. for 2˜4 hours to deposit chromium carbide around TiC powder claim 1 , and then furnace cooling the sintered mixture.3. The method of claim 1 , wherein the preparing step is carried out by mixing the base metal powder having a particle size of 1˜10 μm claim 1 , the TiC powder having a particle size of 0.5˜5 μm claim 1 , and a liquid binder.4. The method of claim 3 , wherein the preparing step is carried out by combining a mixture containing a weight ratio of 78˜82% : 18˜22% of the base metal powder : the TiC powder with the binder claim 3 , the base metal powder comprising claim 3 , by weight: C: 1.4˜1.6% claim 3 , Si: 0.4% or less (0% exclusive) claim 3 , Mn: 0.6% or Less (0% exclusive) claim 3 , P: 0.03% or less (0% exclusive ...

PUMP PROVIDED WITH A SYSTEM FOR COMPENSATING THE INTERNAL PRESSURE

The present document describes a pump () comprising a casing () that encloses a pumping group (). On the casing () at least one inlet conduit for inletting a fluid (F) and at least one outlet conduit for outletting the fluid (F) are obtained. The pumping group () comprises a pair of mutually coupled gears, each mounted on a respective support shaft. The relative movement of a first gear with respect to the second gear defines a pumping chamber having variable volume inside the pumping group (), so as to suck the fluid (F) from the suction conduit to expel it through the delivery conduit. A first support shaft () is operatively connected to an actuator assembly () so that the first gear can operate as a driving gear to set the second gear in rotation. The pump () comprises at least one element () for compensating the increase in volume of the fluid (F) and/or the increase in the pressures inside such a pump (). The element () for compensating the pressure/volume is at least partially manufactured from a shape memory metal alloy having superelastic properties. 110121412141416181020101020. Pump () comprising a casing () enclosing a pumping group () , at least one inlet conduit for inletting a fluid (F) and at least one outlet conduit for outletting said fluid (F) being obtained on said casing () , said pumping group () comprising a pair of mutually coupled gears , each mounted on a respective support shaft , wherein the relative movement of a first gear with respect to the second gear defines a pumping chamber having variable volume inside the pumping group () , so as to suck the fluid (F) from the suction conduit and to eject it through the delivery conduit , a first support shaft () being operatively connected to an actuator assembly () so that the first gear can operate as driving gear to set the second gear in rotation , the pump () comprising at least one element () for compensating the increase in volume of the fluid (F) and/or the increase in the pressures ...

Piston for an internal combustion engine and method for its production

A piston for an internal combustion engine, having a piston base body, a piston ring element having at least an inner region of a piston crown, and a piston skirt. The piston is provided with pin bosses having pin bores and the ring element has at least an outer region of a piston crown having a circumferential top land and a circumferential ring belt provided with ring grooves. The piston base body and piston ring element are joined together by way of corresponding, conical joining surfaces configured on them.

PROGRESSING CAVITY DEVICE WITH CUTTER DISKS

A stator for a helical gear device includes a first section having first helically convoluted chamber with a set of radially inwardly extending lobes and a second section adjacent to the first section. The second section includes a stack of cutter disks. Each cutter disk includes a front surface, a rear surface, an interior surface defining a central opening extending from the front surface to the rear surface, a forward cutting edge, and a rearward cutting edge. The interior surface forms a same number of lobes for the central opening as the set of radially inwardly extending lobes in the first section. Each cutter disk is aligned along a common centerline, and each cutter disk is rotated slightly relative to each other to form a second helically convoluted chamber with a same pitch as the first helically convoluted chamber. The second helically convoluted chamber exposes, to materials passing through, portions of the forward cutting edge or the rearward cutting edge of each cutter disk. 1. A stator for a helical gear device , comprising:a first section including a first helically convoluted chamber with a set of radially inwardly extending lobes; and a front surface,', 'a rear surface,', 'an interior surface defining a central opening extending from the front surface to the rear surface,', 'a first cutting edge along the front surface and the interior surface, and', 'a second cutting edge along the rear surface and the interior surface,, 'a second section adjacent to, and axially aligned with, the first section, the second section including a stack of cutter disks, each of the cutter disks includingthe interior surface forming a same number of lobes for the central opening as the set of radially inwardly extending lobes, each of the cutter disks being aligned along a common centerline, and each of the cutter disks being rotated slightly relative to each other such that the stack of cutter disks forms a second helically convoluted chamber with a same pitch as the ...

Mechanical system comprising a shaft coupled to a bearing, and method for manufacturing such a system

The present invention relates to a mechanical system ( 1 ), comprising a bearing ( 4 ) and a shaft ( 10 ) coupled to the bearing ( 4 ), especially for an internal combustion engine, being subjected to average contact pressures of less than 200 MPa. The shaft ( 10 ) has at least one area ( 12 ) provided with an anti-seizing surface coating ( 20 ), having a surface hardness at least twice that of the bearing ( 4 ), and a microtexturation ( 30 ) comprised of a set of individual microcavities ( 31 ), distributed in said area ( 12 ). The invention also relates to a method for manufacturing such a mechanical system ( 1 ).

BEARING FACES WITH FLUID CHANNELS FOR GEAR PUMPS

A bearing carrier has a bearing body including a first material. The bearing body has an exterior surface defining a bridge land with a finger cut and rotatably supports a first and second gear. The first and second gears intermesh with one another for pressurizing fluid traversing the gears between a fluid inlet and a fluid outlet defined in a housing enveloping the bearing carrier. 1. A method of fabricating a bearing carrier , comprising:defining a near net shape contour of a bridge land in a surface of a second material integral with an underlying first material.2. A method as recited in claim 1 , further including coupling the second material to the first material using a laser cladding process.3. A method as recited in claim 2 , further including scanning a surface of the first material prior to coupling the second material to the first material using the laser cladding process.4. A method as recited in claim 1 , further including removing a portion of the first material prior to coupling the second material to the first material using the laser cladding process.5. A method of fabricating a bearing carrier claim 1 , comprising:at a bearing body formed from a first material, the bearing body having a bridge land with a finger cut to channel fluid pressurized by intermeshing of gears rotatably supported by the bearing carrier into an outlet defined by a housing enveloping the bearing carrier,coupling a second material to the first material; anddefining a near-net shape contour of a bridge land in a surface of a second material integral with an underlying first material.6. The method as recited in claim 5 , wherein the bearing body is a cast body.7. The method as recited in claim 5 , wherein the bearing body is formed from a copper alloy claim 5 , brass claim 5 , or bronze.8. The method as recited in claim 5 , wherein coupling the second material to the first material includes coupling a second material that is the same as the first material.9. The method as ...

Piston for internal combustion engines

A piston of an internal combustion engine, includes a piston upper part and a piston lower part which are supported via corresponding joining webs, in each case forming a joining zone connected in a material-to-material manner by means of a multi-orbital rotary friction weld. The joining webs and which are in each case directly connected have a wall thickness S1, S2 which is identical as far as possible. The piston encloses a combustion-chamber recess and at least one cooling duct which are made centrally or eccentrically in the piston. The combustion chamber recess and the cooling duct form a circular contour or a contour which deviates from a circular shape.

EQUAL-WALLED GEROTOR PUMP FOR WELLBORE APPLICATIONS

One example of a gerotor pump includes an inner rotor comprising multiple teeth, the inner rotor configured to rotate about a first longitudinal gerotor pump axis. The gerotor pump also includes a hollow outer rotor including an outer surface and an inner surface having substantially identical contours, the inner surface configured to engage with the multiple teeth and to rotate about a second longitudinal gerotor pump axis. The pump includes a pump housing within which the inner rotor and the outer rotor are disposed, wherein the outer surface of the outer rotor defines gaps between the pump housing and the outer rotor. 1. A method comprising: an inner rotor comprising a plurality of teeth, the inner rotor configured to rotate about a first longitudinal gerotor pump axis; and', 'a hollow outer rotor comprising an outer surface and an inner surface having substantially identical contours, the inner surface configured to engage with the plurality of teeth and to rotate about a second longitudinal gerotor pump axis; and, 'positioning a gerotor pump in a wellbore, the gerotor pump comprisingpumping wellbore fluid through the wellbore using the gerotor pump.2. The method of claim 1 , wherein the gerotor pump comprises a pump housing within which the inner rotor and the outer rotor are disposed claim 1 , wherein the outer surface of the outer rotor defines gaps between the pump housing and the outer rotor claim 1 , and wherein the method further comprises flowing fluid through the gaps.3. The method of claim 1 , wherein the fluid comprises wellbore fluid.4. The method of claim 1 , wherein the fluid comprises cooling fluid.5. The method of claim 1 , wherein a direction of flow of the cooling fluid in the gaps is either concurrent with or counter-current to a direction of flow of the wellbore fluid through the pump.6. The method of claim 1 , wherein positioning the gerotor pump in the wellbore comprises positioning the gerotor pump downhole inside the wellbore.7. The ...

CAST PISTON FOR AN INTERNAL COMBUSTION ENGINE, CONSISTING OF AN IRON-BASED MATERIAL

A cast piston for an internal combustion engine is made of an iron-based material and has windows in at least one side wall carrying a piston pin boss. The windows are asymmetric relative to one another on the side of the skirt walls. 1. A cast piston for an internal combustion engine , comprising a piston body made of an iron-based material having windows in at least one side wall thereof carrying a piston pin boss , which are asymmetric relative to one another.2. The piston according to claim 1 , wherein at least one of the windows extends into a skirt wall on at least one side.3. The piston according to claim 2 , wherein the skirt wall is cut out in a concave manner.4. The piston according to claim 2 , wherein a width of the skirt wall in the circumferential direction is reduced by at least 30% due to the window.5. The piston according to claim 1 , wherein the at least one window is formed primarily in a half of the side wall that is closer to a piston crown.6. The piston according to claim 1 , wherein the at least one window has an extension of at least 40% of the height of the side wall in the direction of a piston stroke axis.7. The piston according to claim 1 , wherein the at least one window begins at an end of the side wall located in the direction of the piston crown.8. The piston according to claim 1 , wherein the piston is made from spheroidal graphite cast iron or cast steel.9. The piston according to claim 1 , wherein the material of the piston has a lower thermal conductivity than steel.10. The piston according to claim 2 , wherein the at least one side is a counter-pressure side of the piston.11. A cast iron or steel piston for an internal combustion engine claim 2 , comprising:a piston body having a piston crown,a pair of pin bosses depending from the crown, a pair of skirt portions depending form the crown, andconnecting side walls joining the pin bosses to the skirt portion,wherein at least one of the side walls includes a window disposed on ...

PISTON RING FOR COMBUSTION ENGINE

Provided is a piston ring for an internal combustion engine that enables size reduction of a chamfered edge without leading to the chipping, and sufficient size reduction of a flow passage of a blow-by gas in a piston ring gap, thus effectively restraining the blow-by gas from passing through the piston ring gap. A piston ring with a piston ring gap used for an internal combustion engine includes a chamfered edge continuous to at least one of piston ring end faces at the piston ring gap and an outer peripheral surface of the piston ring The chamfered edge has a curved shape. 1. A piston ring with a piston ring gap used for an internal combustion engine , the piston ring comprising:a chamfered edge continuous to at least one of piston ring end faces at the piston ring gap and an outer peripheral surface of the piston ring,wherein the chamfered edge has a curved shape.2. The piston ring according to claim 1 ,wherein the chamfered edge includes at least two arcuate surfaces.3. The piston ring according to claim 1 ,wherein, at an intersection between the chamfered edge and the outer peripheral surface of the piston ring, a tangential direction of the chamfered edge tilts at an acute angle relative to a tangential direction of the outer peripheral surface of the piston ring.4. The piston ring according to claim 1 ,{'b': 1', '2, 'wherein the chamfered edge has a circumferential width L along a circumferential direction of the piston ring greater than a radial width L along a radial direction of the piston ring.'}5. The piston ring according to claim 1 ,{'b': 1', '2', '1', '2, 'wherein the chamfered edge has a ratio L/L of a circumferential width L along a circumferential direction of the piston ring to a radial width L along a radial direction of the piston ring between 0.6 to 2.0.'}6. The piston ring according to claim 1 ,wherein the chamfered edge includes a first arcuate surface, a second arcuate surface formed between the first arcuate surface and the outer peripheral ...

Complex-shaped forged piston oil galleries

A piston for an internal combustion engine including a cooling gallery and a complex combustion surface is provided. The piston includes an upper crown member joined to a lower member, for example by hybrid induction welding. A complex combustion bowl is formed in the upper crown member by forging. The combustion bowl includes at least one protrusion, and typically a plurality of protrusions spaced from one another. After the forging step and before the joining step, portions of an undercrown surface located opposite the spaces between the protrusions are machined, and portions located directly opposite the protrusions are left as-forged. The crown member is joined to the lower member, for example by hybrid induction welding.

Piston assembly with opposing injection regions for an opposed-piston engine

A piston for an opposed-piston, internal combustion engine includes a crown with an end surface having a bowl shaped to form a combustion chamber with an end surface of an opposing piston in the opposed-piston engine. A substantially circumferential top land of the crown meets the end surface at a substantially circular peripheral edge, and a skirt comprising a sidewall extends from a substantially circumferential belt region of the crown. A wristpin bore with a wristpin axis opens through the sidewall. The end surface of the piston includes a pair of injection regions across which fuel is injected into the bowl. The injection regions are disposed in substantially diametrically-opposed quadrants of the end surface which are defined by the wristpin axis and a connecting rod envelope axis substantially orthogonal to the wristpin axis. Each injection region extends along a respective arc concentric with the substantially circular peripheral edge.

Scroll compressor

[Problem] To exchange the roller bearing that has been used in a scroll compressor mounted in an automobile with a m slide bearing. To provide a slide bearing having a performance that is at least equivalent to that of a roller bearing. [Solution] The slide bearing results from baking onto a back metal a sliding layer of 5-60 wt % graphite having an average diameter of 5-50 μm and a graphitization degree of at least 0.6, the remainder comprising a polyimide resin and/or a polyamide-imide resin. The form of the graphite has: (a) an average shape factor (YAVE) as defined of 1-4 for the particles excluding the minute particles that are no greater than 0.5 times the average diameter, and there being at least 70% by number of particles having a shape factor (Y) in the range of 1-1.5; or (b) graphite particles having a particle ratio of at least 0.5 being at least 50% of the total by number.

Method for the production of a piston for an internal combustion engine

A method for the production of a piston made of steel, for an internal combustion engine, in which the upper piston part is produced using the forging method, and the lower piston part is produced using the forging or casting method, and they are subsequently welded to one another. To simplify the production method and make it cheaper, the upper piston part is forged using the method of hot forming and of cold calibration, to finish it to such an extent that further processing of the combustion bowl and of the upper cooling channel regions can be eliminated.

Reciprocating piston engine with liner

A reciprocating piston engine which has a cylinder block, at least one combustion chamber arranged in the cylinder block and a liner which borders the combustion chamber and is composed of a first material is provided. In one example, the reciprocating piston engine comprises a reinforcing element composed of a second material for the radial reinforcement of the liner, said reinforcing element being arranged between the cylinder block and the liner and at least partially surrounding the liner, with the second material having a higher modulus of elasticity than the first material.

Wear-resistant coating for oil pump cavity

Oil pumps having wear-resistant coatings applied thereto and methods of applying the coatings are disclosed. The oil pump may include an aluminum housing that defines a cavity. A steel rotor may be disposed within the cavity and configured to rotate therein such that a portion of the steel rotor contacts the aluminum housing. A metal coating (e.g., steel) may cover at least a portion of the aluminum housing in a region that is configured to be contacted by the steel rotor. An integrated oil pump and engine cover is disclosed including an aluminum body having a peripheral wall defining a cavity. The peripheral wall may form a portion of the oil pump housing and the cavity may receive a steel rotor. A wear-resistant coating (e.g., steel) may cover at least a portion of the peripheral wall in a region that is configured to be contacted by the steel rotor.

Equal-walled gerotor pump for wellbore applications

One example of a gerotor pump includes an inner rotor comprising multiple teeth, the inner rotor configured to rotate about a first longitudinal gerotor pump axis. The gerotor pump also includes a hollow outer rotor including an outer surface and an inner surface having substantially identical contours, the inner surface configured to engage with the multiple teeth and to rotate about a second longitudinal gerotor pump axis. The pump includes a pump housing within which the inner rotor and the outer rotor are disposed, wherein the outer surface of the outer rotor defines gaps between the pump housing and the outer rotor.

VACUUM-PUMP ROTOR

A vacuum pump rotor comprises at least one displacement element arranged on a rotor shaft. The rotor shaft comprises at least one shaft end for a bearing element to be arranged thereon. The rotor element, the at least one displacement element and the at least one shaft end are made from aluminum or an aluminum alloy. 1. A vacuum pump rotor , comprisingat least one displacement element arranged on a rotor shaft,wherein said rotor shaft comprises at least one shaft end for a bearing element to be arranged thereon,whereinsaid rotor shaft, said at least one displacement element and said at least one shaft end are made from aluminum or an aluminum alloy.2. The vacuum pump rotor according to claim 1 , wherein on the rotor shaft at least two displacement elements are arranged.3. The vacuum pump rotor according to claim 1 , wherein the rotor shaft and at least one of the displacement elements are integrally formed.4. The vacuum pump rotor according to claim 1 , wherein the rotor shaft and all displacement element are integrally formed.5. The vacuum pump rotor according to claim 1 , wherein the aluminum used or the aluminum alloy used has a thermal expansion coefficient which is smaller than or equal to 21×10/K.6. The vacuum pump rotor according to claim 1 , wherein the aluminum alloy used comprises a high silicon content of about least 15%.7. The vacuum pump rotor according to claim 1 , wherein the surface of the at least one displacement element and/or the rotor shaft is provided with a wear-reducing coating.8. The vacuum pump rotor according to claim 1 , wherein the at least one shaft end comprises a bushing from a harder material claim 1 , in particular steel or a ceramic material.9. The vacuum pump rotor according to claim 8 , wherein the bushing is pressed onto the at least one shaft end or is molded into said at least one shaft end.10. The vacuum pump rotor according to claim 1 , wherein the surface of at least one of the displacement elements is provided with an ...

LIGHTWEIGHT PISTON PIN FOR PISTON INERTIAL LOADING

An exemplary piston pin for a power cell unit having a piston assembly and a connecting rod may include an elongated body. The elongated body generally may be configured to rotatably secure the piston assembly and the connecting rod in a manner such that no more than approximately an inertial loading generated from an upward movement of the piston assembly is transferred to the elongated body. 1. A piston pin for a power cell unit having a piston assembly and a connecting rod , the piston pin comprising an elongated body configured to rotatably secure the piston assembly and the connecting rod in a manner such that no more than approximately an inertial loading generated from an upward movement of the piston assembly is transferred to the elongated body.2. The piston pin of claim 1 , wherein the elongated body includes a core of a first material and a shell of a second material.3. The piston pin of claim 2 , wherein the first material is aluminum claim 2 , and the second material is steel.4. The piston pin of claim 1 , wherein the material of the elongated body is at least one of steel claim 1 , aluminum claim 1 , ceramic claim 1 , magnesium claim 1 , titanium claim 1 , fiber reinforced composite claim 1 , polymer claim 1 , cast iron claim 1 , and steel.515. The piston pin of claim 1 , wherein the elongated body has a circular cross-section with a diameter of mm or less.6. The piston pin of claim 1 , wherein the elongated body is hollow.7. The piston pin of claim 1 , wherein none of a gas load generated from downward movement of the piston assembly is transferred to the elongated body.8. A piston pin for a power cell unit having a piston assembly and a connecting rod claim 1 , the piston pin comprising an elongated body configured to rotatably secure the piston assembly and the connecting rod claim 1 , the elongated body being configured to withstand an inertial loading during an upward movement of the piston assembly and not a gas load during a downward movement of ...

GASEOUS FLUID COMPRESSION DEVICE

An apparatus for compressing gas-phase fluid including a housing having a wall, a stator having a base plate and a helical wall extending from one side of the base plate, and an orbiter having a base plate and a helical wall extending therefrom. The base plates are disposed such that the wall of the stator and the wall of the orbiter engage with each other to define closed working chambers. The volumes and positions of the working chambers are changed in response to the motion of the orbiter. The apparatus includes a guide device having an opening formed in the base plate of the orbiter and a pin coupled to the housing. The pin engages the opening. A sliding element is disposed between the wall of the housing and the orbiter and coupled to the wall. The pin is pressed into an opening formed in the sliding element. 113-. (canceled)14. An apparatus for compressing gas-phase fluid comprising:a housing having a wall;a non-motional stator having a base plate and a helical wall extending from one side of the base plate;a motional orbiter having a base plate and a helical wall extending from the base plate, the base plate of the stator and the base plate of the orbiter disposed wherein the wall of the stator and the wall of the orbiter engage each other to define closed working chambers, volumes and positions of the working chambers being changed in response to motion of the orbiter;a guide device having an opening formed in the base plate of the orbiter and a pin fixedly coupled to and protruding from the housing, the pin engaging into the opening; anda sliding element disposed between the wall of the housing and the orbiter and fixedly coupled to the wall of the housing, wherein the pin is pressed into an opening formed in the sliding element.15. The apparatus according to claim 14 , wherein the sliding element has a circular ring disk shape that has an inner diameter claim 14 , an outer diameter claim 14 , a thickness claim 14 , an outer jacket surface claim 14 , and ...

PROGRESSING CAVITY DEVICE WITH CUTTER DISKS

A stator for a helical gear device includes a first section having first helically convoluted chamber with a set of radially inwardly extending lobes and a second section adjacent to the first section. The second section includes a stack of cutter disks. Each cutter disk includes a front surface, a rear surface, an interior surface defining a central opening extending from the front surface to the rear surface, a forward cutting edge, and a rearward cutting edge. The interior surface forms a same number of lobes for the central opening as the set of radially inwardly extending lobes in the first section. Each cutter disk is aligned along a common centerline, and each cutter disk is rotated slightly relative to each other to form a second helically convoluted chamber with a same pitch as the first helically convoluted chamber. The second helically convoluted chamber exposes, to materials passing through, portions of the forward cutting edge or the rearward cutting edge of each cutter disk. 1. A stator for a helical gear device , comprising: a front surface,', 'a rear surface,', 'an interior surface defining a central opening extending from the front surface to the rear surface,', 'a first cutting edge along the front surface and the interior surface, and', 'a second cutting edge along the rear surface and the interior surface, wherein the interior surface has concave contour between the first cutting edge and the second cutting edge,, 'a first section including a stack of cutter disks, each of the cutter disks includingthe interior surface forming a same number of lobes for the central opening as the set of radially inwardly extending lobes, each of the cutter disks being aligned along a common centerline, and each of the cutter disks being rotated slightly relative to each other such that the stack of cutter disks forms a first helically convoluted chamber with a set of radially inwardly extending lobes,wherein the first helically convoluted chamber in the stack of ...

VARIABLE LUBRICANT VANE PUMP

A vane pump for providing a pressurized lubricant includes a static pump housing defining an inlet and an outlet, a shiftable control ring with at least one slide support surface, a pump rotor with rotor vanes which rotate within the control ring, and metal slide support pad(s). The control ring shifts with respect to the pump rotor to vary an eccentricity and to thereby control a volumetric pump performance. The pump housing comprises a static control ring housing body which radially surrounds and supports the control ring, and two static pump housing lids which axially support the control ring housing body and the control ring. The control ring housing body is made of plastic. The metal slide support pad(s) is fixed to the static control ring housing body and, together with the at least one slide support surface, provides a friction bearing for the control ring. 16-. (canceled)7. A variable lubricant vane pump for providing a pressurized lubricant , the variable lubricant vane pump comprising:a static pump housing which defines a pump inlet and a pump outlet;a shiftable control ring comprising at least one slide support surface;a rotatable pump rotor comprising a plurality of rotor vanes which are configured to rotate within the shiftable control ring; andat least one metal slide support pad,wherein,the shiftable control ring is configured to be shiftable with respect to the rotatable pump rotor so as to vary an eccentricity of the shiftable control ring with respect to the rotatable pump rotor so as to control a volumetric pump performance,the static pump housing comprises,a static control ring housing body which is configured to radially surround and tosupport the shiftable control ring, andtwo static pump housing lids which are configured to axially support the static controlring housing body and the shiftable control ring,at least the static control ring housing body is made of a plastic, andthe at least one metal slide support pad is fixed to the static ...

COMPLEX-SHAPED FORGED PISTON OIL GALLERIES

A steel piston with an oil gallery, and process for forming a steel piston oil gallery channel, which corresponds to the complex shape of the combustion bowl in the piston crown. The oil gallery channel is first forged to the basic shape that corresponds to the shape of the walls of the combustion bowl. Machine-turning surfaces in the oil gallery channel can be machine-finished as desired. Surfaces in the oil gallery which cannot be machined with conventional turning operations, such as recesses and protrusions into the channel, are left in the original forged condition. 1. A piston for an internal combustion engine including at least one pin boss , at least one piston skirt portion; a combustion bowl recessed in an upper surface of said piston body , and an oil gallery below said combustion bowl , and wherein said oil gallery has a radially inner wall surface with portions thereof that are machined and recessed portions that are unmachined and in an as-forged condition.2. The piston of wherein the machined portions are adjacent the as-forged portions.3. The piston of wherein the oil gallery includes a bottom wall.4. The piston of wherein the bottom wall includes at least one opening for the ingress or egress of oil into and/or out of the oil gallery.5. The piston of wherein the piston is made of two pieces joined together.6. The piston of wherein the combustion bowl has a complex shape and the inner wall surface of the oil gallery at least in part complements the shape of the combustion bowl. This U.S. Continuation Application claims the benefit of U.S. Continuation application Ser. No. 15/096,498, filed Apr. 12, 2016 which claims the benefit of U.S. Utility application Ser. No. 13/769,751, filed Feb. 18, 2013, now U.S. Pat. No. 9,334,958, issued May 10, 2016 which are incorporated herein by reference in their entirety.The invention relates generally to pistons for internal combustion engines, particularly diesel engines, and more particularly to pistons having oil ...

PISTON

A ferrous piston for gasoline powered engines having dimensions which achieve reduced mass and improved performance is provided. The piston crown has a thickness of less than 4 mm and includes valve pockets with an axial clearance between the valve pockets and an uppermost ring groove of less than 1.5 mm. The pin bosses have an axial thickness of less than 3.7% of a bore diameter, which is the largest outer diameter of the piston, measured between a pin bore and the crown at 1 mm from an inner face forming the pin bore. Each pin boss has a radial thickness of less than 3% of the bore diameter measured between the pin bore and a lower end of the pin boss. An undercrown surface presents a projected area of less than 45% of a total piston bore area, wherein the total piston bore area is πBD/4, BD being the bore diameter. 1. A piston , comprising:a piston body and piston crown formed of a ferrous material;said piston crown including a crown wall presenting an upper surface for being exposed to combustion gases and an undercrown surface for being exposed to cooling oil during operation, said crown wall having a crown wall thickness extending from said upper surface to said undercrown surface, said crown wall thickness being less than 4 mm;said piston crown including a least one valve pocket formed in said crown wall; andsaid piston crown including a ring belt extending from said upper surface, said ring belt including a plurality of ring grooves, wherein an axial clearance between said valve pocket and an uppermost one of said ring grooves is less than 1.5 mm.2. The piston of claim 1 , wherein said piston body presents a bore diameter being the largest outer diameter of said piston body claim 1 , said ring grooves are spaced from one another by lands claim 1 , said lands include a top land depending from said upper surface and having an axial thickness of less than 3% of said bore diameter claim 1 , and a second land spaced from said top land by one of said ring grooves ...

EQUAL-WALLED GEROTOR PUMP FOR WELLBORE APPLICATIONS

One example of a gerotor pump includes an inner rotor comprising multiple teeth, the inner rotor configured to rotate about a first longitudinal gerotor pump axis. The gerotor pump also includes a hollow outer rotor including an outer surface and an inner surface having substantially identical contours, the inner surface configured to engage with the multiple teeth and to rotate about a second longitudinal gerotor pump axis. The pump includes a pump housing within which the inner rotor and the outer rotor are disposed, wherein the outer surface of the outer rotor defines gaps between the pump housing and the outer rotor. 1. A gerotor pump comprising: a first inner rotor comprising a first plurality of teeth, the inner rotor configured to rotate about a first longitudinal gerotor pump axis;', 'a first hollow outer rotor comprising a first wall comprising an outer surface and an inner surface having substantially identical contours, the first outer rotor configured to engage with the first plurality of teeth and to rotate about a second longitudinal gerotor pump axis; and', 'a first pump housing within which the first inner rotor and the first outer rotor are disposed, wherein the outer surface of the first outer rotor defines a plurality of gaps between the first pump housing and the first outer rotor, wherein the gaps are configured to allow passive fluid passage between the first outer rotor and the first pump housing; and, 'a first stage comprising a second inner rotor comprising a second plurality of teeth, the second inner rotor configured to rotate about a third longitudinal gerotor pump axis;', 'a second hollow outer rotor comprising a second wall comprising an outer surface and an inner surface having substantially identical contours, the second outer rotor configured to engage with the second plurality of teeth and to rotate about a fourth longitudinal gerotor pump axis; and', 'a second pump housing within which the second inner rotor and the second outer ...

Device and method for producing a piston unit for an internal combustion engine

Ferrous metal or aluminium piston for internal combustion engine

In an internal combustion engine piston in which at least the crown consists of iron, steel or other iron-based alloy, especially an articulated piston, a built piston or a piston made completely of steel or other iron-based alloy, at least part of the crown surface has a high temperature inorganic lacquer coating for counteracting scaling of the coated surface. Also claimed is an engine aluminium piston with or without a combustion depression, in which the combustion space-side surface of the piston has a polyphosphate coating which may contain aluminium particles.

Forged or cast piston head of a multi-part piston

In a piston head of a multiple component piston for internal combustion engines, the piston floor continues radially outwards into the ring section which is provided with the piston ring grooves, the supports which carry the hubs are arranged at a distance from the inner face of the ring section and the piston pin which bears the piston shaft can be mounted in the bores of the piston pin boss. An improved manufacture of the piston head is ensured by connecting the ring section with the piston floor via a weld, solder, friction or positive locking joint.

Pendulum shaft piston

Piston with piston base made of forged steel and a cooling channel

Bei einem Kolben mit Kühlkanal, der einen Kolbengrundkörper aus geschmiedetem Stahl mit einem kastenförmigen Schaft, Naben und Nabenabstützungen und Verbindungswände zwischen den Nabenabstützungen sowie eine Verbrennungsmulde aufweist, soll die Steifigkeit der Ringpartie erhöht werden. DOLLAR A Hierzu weist der Kolben oberhalb der Nabenbohrungen eine umlaufende Wand auf. Zwischen dieser Wand und dem Kolbenboden ist ein Bauteil eingeschweißt, das den Kühlkanal begrenzt. Durch diese Konstruktion wird bei gattungsgemäßen Kolben die Steifigkeit der Ringpartie erhöht. In the case of a piston with a cooling channel, which has a piston base made of forged steel with a box-shaped shaft, hubs and hub supports and connecting walls between the hub supports and a combustion bowl, the rigidity of the ring section is to be increased. DOLLAR A For this purpose, the piston has a circumferential wall above the hub bores. A component that delimits the cooling channel is welded in between this wall and the piston crown. This construction increases the rigidity of the ring section in the case of generic pistons.

Dual gallery piston

A heavy duty diesel piston includes upper and lower portions (102, 104) joined across a friction weld and internally contoured to provide a dual gallery structure including an outer annular gallery (122) and a central gallery (120) joined by passages for communicating cooling oil therebetween. The dual-gallery structure allows oil to enter from the outer gallery (122), which is formed by the circumferential annular recess (101) in the crown and crown bottom, into the central gallery (120) to cool the piston and particularly the central crown region exposed to hot combustion gases. The friction weld provides high structural integrity and minimizes the number of manufacturing steps need to attach the crown to the crown bottom.

Method for making piston of internal combustion engine

FIELD: plastic metal working, possibly manufacture of wide assortment of pistons of internal combustion engines for motor vehicle and caterpillar type transport vehicles, aircrafts, sea and river ships. SUBSTANCE: method comprises steps of forming blank of aluminum alloy with structure including strengthening particles and subsequent heat treatment. Blank is formed of aluminum alloy containing 25-60 vol% of strengthening particles with mean size less than 15 square micrometers at temperature consisting 0.8-0.98 of Tmelt at rate 5•10 -2 - 5•10 -5 c -1 in usual mode or in superductile mode at least during one transition. Method allows to make pistons of Silumin with wide range of mechanical properties in dependence upon initial structure and structure provided after deformation. EFFECT: enlarged manufacturing possibilities of method. 41 cl, 6 dwg стб9с ПЧ с» РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (13) КО ’2 176 943 ^^ С2 (51) МК’ В 21К 1/18, С 22Е 1/04 (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 99105048/02, 12.03.1999 (71) Заявитель: Институт проблем сверхпластичности (24) Дата начала действия патента: 12.03.1999 металлов РАН (43) Дата публикации заявки: 20.01.2001 (46) Дата публикации: 20.12.2001 (56) Ссылки: КЦ 94027088 А|, 07.10.1996. ($ 4582544 А, 15.04.1986. ЕР 01047174 А2, 04.04.1984. ЗР 59006351 А, 13.01.1984. ($ 5342459 А, 30.08.1994. (98) Адрес для переписки: 450001, г.Уфа, ул. Степана Халтурина, 39, ИПСМ РАН, Директору О.А.Кайбышеву (72) Изобретатель: Кайбышев О.А., Трифонов В.Г. (73) Патентообладатель: Институт проблем сверхпластичности металлов РАН (54) СПОСОБ ИЗГОТОВЛЕНИЯ ПОРШНЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ (57) Изобретение относится к области обработки металлов давлением и может быть использовано при изготовлении широкой номенклатуры поршней двигателей внутреннего сгорания для автомобильного и гусеничного транспорта, авиационной техники, морских и речных судов. Способ изготовления поршня двигателя ...

内燃机活塞的制造方法

本发明涉及一种由钢构成的内燃机活塞（1）的制造方法，其中以锻造方法制造活塞上部件（3）并且以锻造方法或铸造方法制造活塞下部件（4）然后将它们相互焊接在一起。为了简化制造工艺并且降低制造成本借助于热成型和冷校准的方法这样锻造完成活塞上部件，即，可以省略掉对活塞顶凹坑和冷却通道的上部区域的进一步加工。

带有填充室的钢活塞

提供了一种用于内燃机的钢活塞，该活塞包括冷却室，冷却室中包含诸如基于铝的材料类的固态冷却剂。固态冷却剂的导热率大于所述钢材料的导热率，并且固态冷却剂填充冷却室的至少15％的体积。固态冷却剂提供沿活塞冠状部的卓越冷却，减小沿冠状部的腐蚀与磨损，以及避免油焦化的问题。

Ceramic-Metal Friction Welding Body and Ceramic Casting Piston Composed of It

一种蠕状石墨铸铁涡旋盘及其生产工艺

本发明公开了一种蠕状石墨铸铁涡旋盘及生产工艺，由蠕状石墨铸铁铸造制得，以质量百分比计，其原料含有：C:3.6%~4.0%、Si:1.6%~2.0%、Mn:0.4%~0.8%、P:0%~0.25%、S:0.01%~0.04%、Cu:0.20%~0.6%、Sn:0.04%~0.08%、Cr:0.10%~0.3%、余量为Fe和伴随杂质，原料生产过程中采用0.30%~0.40%的变质处理剂控制石墨形态的蠕化率为20%~60%，涡旋盘的机械性能得到极大提升，抗拉强度≥450N/mm 2 、屈服强度≥315N/mm 2 、延伸率≤3%、硬度范围为HB200~HB250，耐久寿命测试高达2600小时。

High-speed engine

Изобретение может быть использовано в двигателестроении. Двигатель (1) содержит цилиндр (2) и поршень (3), который перемещается внутри цилиндра (2). Поршень (3) содержит по меньшей мере выступ (6) и/или выемку, которые устраняют трение боковой поверхности поршня во время перемещения. Имеются соединительная тяга (4), которая смещена от оси цилиндра и, в то же время, соединена с поршнем (3) под углом и, кривошип (5), который регулирует скорость поршня (3) при его ходах благодаря углу двух концов соединительной тяги (4) относительно оси цилиндра (2). Технический результат заключается в повышении величины крутящего момента и снижении потерь на трение. 12 з.п. ф-лы, 15 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 542 629 C2 (51) МПК F02B 41/00 (2006.01) F02B 75/32 (2006.01) F16C 7/02 (2006.01) F02F 3/28 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2012147236/06, 05.04.2011 (24) Дата начала отсчета срока действия патента: 05.04.2011 (72) Автор(ы): ОЗДАМАР Хасан Басри (TR) (73) Патентообладатель(и): ОЗДАМАР Хасан Басри (TR) Приоритет(ы): (30) Конвенционный приоритет: R U 07.04.2010 TR 2010/02685 (43) Дата публикации заявки: 20.05.2014 Бюл. № 14 (45) Опубликовано: 20.02.2015 Бюл. № 5 2 5 4 2 6 2 9 (56) Список документов, цитированных в отчете о поиске: US 2007256650 A1, 08.11.2007 . US 7021270 B1, 04.04.2006 . US 5076220 A, 31.12.1991 . JP 11 050857 A, 23.02.1999 . RU 44147 U1, 27.02.2005. RU 2243431 C2, 27.12.2004. FR 612443 A, 23.10.1926 (86) Заявка PCT: TR 2011/000076 (05.04.2011) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 07.11.2012 (87) Публикация заявки PCT: R U 2 5 4 2 6 2 9 WO 2011/126464 (13.10.2011) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) ВЫСОКОСКОРОСТНОЙ ДВИГАТЕЛЬ (57) Реферат: Изобретение может быть использовано в двигателестроении. Двигатель (1) содержит цилиндр (2) и поршень (3), ...

Piston assembly unit holding device

(57)【要約】 【課題】 ピストン組立体の保持装置に関する。 【解決手段】 過去のピストンピン組立体の設計と構造 では、ピストンピン組立体、ピストンスカート、または ピストンクラウンに応力集中要因を加えることになる保 持装置を含む。本発明は、ピストン組立体を接続ロッド に保持し、応力集中要因を加えることなく２つの部分を ピストンピン組立体に保持するための装置を提供する。 該装置は、圧縮力を全ピストンピンに沿ってかけ、ピス トンピン組立体に剛性を与える保持手段を用いる。この 設計では、さらに分離耐性に優れたり、またはピストン 組立体の全重量がより軽量となるような、強度のあるピ ストン組立体を可能にする。

Cooled cylindrical piston for internal combustion engines

Piston for internal combustion engine

Patent DE4021931C2

Valve-plate for reciprocating compressor

The two half-plates (3, 5) accommodate suction and pressure plugs. On the pressure side of the valve plate (1) are one or more pressure ports (7) enclosed by a valve seat (11) for the pressure plug, and which is formed by the material of the plate. A body, typically a sleeve (19) or a steel rivet, is inserted in the port, and protects the joint between the half-plates from heat. A coolant passage (9) through the plate can be formed by recesses in the faces of the half-plates bearing against each other, and one or more grooves for an elastomer seal can be formed in the suction and/or pressure side of the plate.

Shielded insulation for combustion chamber

In an uncooled engine, it is propose to form insulator coatings on the combustion chamber surfaces, and to mechanically protect such coatings against erosion or cracking by means of outer protective layers applied over the insulator coatings. The insulator coatings can be zirconium oxide applied to a thickness of approximately 0.15 inch. The protective layers can be formed of various materials resistant to high temperatures in the vicinity of 2000° F., e.g. silicon nitride, steel or cast iron.

Enhanced Co-based alloy

A Co-based alloy exhibits superior high-temperature strength and resistance properties. In one embodiment, the Co-based alloy contains, in weight percent, from about 0.1 to about 1.2 of C; from about 0.01 to about 2 of at least one of Si and Mn; from about 22 to about 37 of Cr; from about 5 to about 15 of Ni; from about 0.1 to about 3.5 of Re; with a balance being Co and incidental impurities. Co and C, Si, Mn, Cr, Ni, Re, B, Zr, W, Mo, Ta, and Nb impart high-temperature wear resistance to the alloy to withstand repeated temperature cycling in a glass spinnaret. In one embodiment of the present invention, Hf is added to improve molten glass corrosion resistance, while Y and other rare earth elements are added in alternate embodiments to improve high-temperature oxidation resistance. Percentages by weight are disclosed for enhanced high-temperature oxidation resistance, increased fluid wear resistance and enhanced molten glass corrosion resistance.

Rotary compressor

【課題】空気調和機を暖房機として低外気温で使用した場合でも、環状ピストンが異常摩耗することのないロータリ圧縮機を得ること。【解決手段】環状のシリンダと、軸受部及び吐出弁部を有し前記シリンダの端部を閉塞する端板と、前記軸受部に支持された回転軸の偏芯部に嵌合され前記シリンダのシリンダ内壁に沿って該シリンダ内を公転し前記シリンダ内壁との間に作動室を形成する環状ピストンと、前記シリンダのベーン溝内から前記作動室内に突出して前記環状ピストンに当接し前記作動室を吸入室と圧縮室とに区画するベーンと、を有する圧縮部を備えるロータリ圧縮機において、前記ベーンは、鋼材で形成されるとともに前記環状ピストンとの摺動面にダイヤモンド状炭素層が形成され、前記環状ピストンは、０．１５〜０．４５ｗｔ％のリンを添加したモニクロ鋳鉄で形成される、又は、鋳鉄若しくは鋼材で形成されるとともに外周面に窒化鉄層が形成される。【選択図】図３

Piston device for reciprocating piston type internal combustion engine

Rotary compressor

本发明提供一种旋转式压缩机，该旋转式压缩机具备压缩部，所述压缩部具有环状气缸、具有轴承部及排出阀部且阻塞所述气缸的端部的端板、嵌合于支承在所述轴承部的旋转轴的偏心部且沿所述气缸的气缸内壁在该气缸内公转从而在与所述气缸内壁之间形成工作腔的环状活塞、从所述气缸的叶片槽内向所述工作腔内突出而抵接于所述环状活塞且将所述工作腔划分为吸入室和压缩室的叶片。所述叶片由钢材形成，并且在与所述环状活塞的滑动面形成类金刚石碳层。所述环状活塞由添加了0.15～0.45wt％的磷的Ni‑Cr‑Mo铸铁形成，或者由铸铁或钢材形成，并且在外周面形成氮化铁层。

Patent FR2442336B1

Multi-cylinder engine cooling system

Method for producing a piston with cavity

Internal combustion engine piston unit manufacture process

The piston unit making process includes clamping a casting core in the cavity of a casting mould (20-23) for the piston. The core has an inner ring (24a) forming an annular passage within the piston body, an outer ring (24c), and a number of connection regions (24b) linking these two rings. The metal alloy is cast into the cavity and solidifies there. The outer ring of the core is then removed. The space left is filled with a reinforcing material. The inner ring and the connection regions are then released.

Production of a piston for an I.C. engine comprises forming a piston green body by casting having a peripheral radial groove, inserting a covering ring in the groove, covering, forming a cooling channel and filling with reinforcing material

Production of a piston for an internal combustion engine comprises forming a piston green body by casting having a peripheral radial groove which acts to form an annular groove and cooling channel (7); inserting a covering ring in the groove; covering the groove; forming the cooling channel; filling the groove with reinforcing material (11) by welding and mechanically inserting an annular groove in the reinforcing material. Preferred Features: The radial groove has a cross-section that tapers inwardly. The reinforcing material is made of metal, metal alloy or metal-ceramic, preferably nickel-copper or special steel.

Method of making a piston unit for an internal combustion engine

The method of making a piston unit for an internal combustion engine incorporates the steps of pinching a melting core in a mold cavity of a piston mold wherein the melting core includes an inner ring that forms a ring shaped passage within a piston body, an outer ring and a plurality of coupling portions connected with between the inner ring and the outer ring. The method further includes pouring molten metallic alloy into the cavity and solidifying therein, removing the outer ring of the melting core, filling the space left by removal of the outer ring with reinforced material, and then melting the inner ring and the coupling portions of the melting core.

Patent DE3721021C2

Multi-part cooled piston for IC engine - has hollow ring-shaped chamber in head part for cooling oil, closed at based

The articulated piston (1) consists of a head part (2) and a piston shaft (3) which are only joined by a gudgeon pin. From the floor (4) of the head part extends an outer ring wall (5) contg. grooves for the piston rings. Radially spaced inside the ring wall a ring rib (6) joins a nave (7) to the piston floor (4), and to locate the gudgeon pin in the nave (7) a bush (8) is provided. Between the ring rib and the ring wall (5) is a ring-shaped hollow chamber (9) which is enclosed by a plate ring (10) to form a closed cooling oil chamber. The plate ring is divided radially into two halves on its periphery, whereby the edges are bent upwards in pressure and counter pressure directions, locating elastically against one another. USE - As a multi-part oil-cooled piston for an internal combustion engine.

Method for the manufacture of a two piece piston and piston

Piston tops (1, 70), specially those provided with combustion chamber (2, 20) and ring zone (3, 30) have their cooling condition sensibly improved in such regions due to a better use of the cooling oil capacity by closing the cooling chamber (5, 50) and the region 2I under the combustion chamber by annular ring members (96, 13) in a resilient material, e.g., a polymeric material or, preferably a spring steel, which clamp under the cooling chamber (5, 50) and the region 2I with dimensional interference respectively with grooves (10, 100), notches (11, 110) and groove 15. Methods for the manufacture of such top portion having a reduced compression height are also described.

Piston

Multi-part oil-cooled piston for IC engine - has ring-shaped hollow chamber in head part for cooling oil

The piston (1) comprises a head part (2) on the nave (3) of which a shaft (4) is pressed, being secured by a nave bush (5). A securing ring (6) engages in a groove in the piston shaft, and locates on the one hand on the outer face side of the nave bush (5), and on the other hand on the face side of the piston gudgeon pin. From the floor (7) of the head part (2) extends an outer ring qall (8) contg. the grooves for the piston rings. Radially with clearance within the ring wall, a ring rib (9) joins the nave (3) with the piston floor (7). Between the ring rib and the ring wall is a ring-shaped hollow chamber (10) enclosed by a plate ring (11) to form a cooling oil chamber. USE - As an oil-cooled, multi-part piston for an internal combustion engine.

Piston for an internal combustion engine and method for its production

Vorgeschlagen wird ein Kolben (1 ) für einen Verbrennungsmotor mit einem nahe dem Kolbenboden (5) und radial außen angeordneten, geschlossenen Ringkanal (4), der kolbenbodenseitig eine ringförmige Öffnung (21 ) aufweist, die im Schnitt die Form eines Trapezes mit in kolbenbodenabgewandte Richtung konisch zulaufenden Schenkeln hat, und die von einem ringförmigen Verschlusselement (3) verschlossen ist, das im Schnitt die gleiche Trapezform wie die Öffnung (21 ) aufweist, wobei das Verschlusselement (3) in der Öffnung (21 ) mittels Reibschweißen befestigt ist.

Piston for an internal combustion engine and method for its production

Proposed is a piston ( 1 ) for an internal combustion engine having a closed annular duct ( 4 ) which is arranged close to the piston head ( 5 ) and radially at the outside, which annular duct ( 4 ) has, at the piston head side, an annular opening ( 21 ) which, in section, has the shape of a trapezium with limbs which taper conically in the direction away from the piston head, and which is closed off by an annular closure element ( 3 ) which, in section, has the same trapezium shape as the opening ( 21 ), with the closure element ( 3 ) being fastened in the opening ( 21 ) by means of friction welding.

Piston for a combustion engine and method for producing same

Internal combustion engine piston with cooling channel said piston comprising a sealing element sealing the cooling channel

Aluminium alloy piston with annular groove reinforcements

An unfinished aluminium alloy piston is heated to a temp. e.g. ca. 204 degrees C, which is below the alloy softening temp. The annular groove is sand blasted as the piston is rotated and while the piston is still hot (pref. at 149 degrees C) a bonding agent (pref. Ni-Al alloy) is sprayed on the groove surface. Following this treatment a wear-resistant metal (pref. stainless steel) is sprayed onto the groove while the temp. of the piston is 149 degrees C - 216 degrees C.

Reinforced pistons

Pistons

A method is described of bonding a component in a piston, the method comprising the steps of coating the component surfaces to be bonded with an oxidation-resistant particulate material, preheating the coated component, placing the preheated component in a casting die and then casting an aluminium alloy around the component. The casting technique may comprise squeeze-casting.

Reinforcing aluminium alloy piston ring groove - by fusing ring portion and adding constituent alloying to fused part

Cooling duct piston for a direct-injection diesel engine

본 발명의 목적은 일정한 또는 상승하는 출력의 경우에 직접 분사 디젤엔진용 냉각 채널 피스톤(1)의 압축높이의 감소를 얻는 것이다. 상기 목적을 위하여 피스톤(1)은 서로 납땜된 적어도 2개의 부품들(2,3)로 되어 있다.이 부품들 중의 하나는 강으로부터 단조되었고 그리고 스커트(8), 허브(6) 그리고 링형상부품(9)을 가지는 피스톤 기본몸체(2)이다. 강으로 만들어지거나 또는 니켈- 기초로 된 재료로 만들어진 다른 부품은 연소요홈(4)과 그리고 피스톤 헤드(5)의 적어도 일부분을 포함한다. 피스톤 기본몸체(2)와 제 2부품(3)은 함께 오일로 채워질 수 있는 냉각 채널(11)을 형성한다. The object of the present invention is to obtain a reduction in the compression height of the cooling channel piston 1 for direct injection diesel engines in the case of constant or rising power. For this purpose the piston 1 consists of at least two parts 2 and 3 soldered together. One of these parts is forged from steel and the skirt 8, the hub 6 and the ring-shaped part. It is a piston basic body (2) having (9). Other parts made of steel or made of nickel-based materials include the combustion groove 4 and at least a portion of the piston head 5. The piston body 2 and the second part 3 together form a cooling channel 11 which can be filled with oil.

Sectional piston for internal combustion engine

FIELD: mechanical engineering; engines. SUBSTANCE: piston has steel detachable cover, clamping bolts whose heads are arranged in cover circular groove and stems, in radial grooves of cover. Bolts pass through holes in piston body and press cover to cast iron insert. Semispherical bimetallic thin-walled shell has steel base with antifriction coating. Shell is placed in semispherical seat of insert, thrusting with end face surface against end face of retainers installed in spherical bearing cap. EFFECT: enhanced quality of piston. 1 dwg $590790с ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) ВИ “” 2064 065 ^^ Сл МК Е 02Е 3/28, Е 16 4 1/22 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 93032399/06, 22.06.1993 (46) Дата публикации: 20.07.1996 (56) Ссылки: Заявка РСТ М М/О 86/06136, кл. Е 02 В 15/26, 1986. (71) Заявитель: Акционерное общество "Тутаевский моторный завод" (72) Изобретатель: Фокин Л.Ф., Коровко М.М. (73) Патентообладатель: Акционерное общество "Тутаевский моторный завод" (54) СОСТАВНОЙ ПОРШЕНЬ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ (57) Реферат: Использование: в двигателестроении, в частности конструкции сборных поршней ДВС. Сущность изобретения: поршень содержит стальную съемную накладку, стяжные болты, головки которых размещены в кольцевой проточине накладки, а стержни - в ее радиальных пазах. Болты также проходя через сквозные отверстия корпуса поршня и притягивают накладку к чугунной вставке. Полусферический биметаллический тонкостенный вкладыш имеет стальную основу с антифрикционным покрытием и установлен в полусферическом гнезде вставки, а своей торцевой поверхностью упирается в торец сухарей, установленных в крышку сферического подшипника. 1 ил. Хх 1\ ы РАК < в 722 НИИ \ \ ГА Ги. \ Са 7 2064065 С1 КО (19) ВИ “” 2064 065 ^^ Сл $590790с ПЧ ГЭ КУЗЗАМ АСЕМСУ ГОК РАТЕМТ$ АМО ТКАОЕМАКК$ 12) АВЗТКАСТ ОЕ 1МУЕМТОМ (51) 16 | 28 3/28, Е 16 4 1/22 (21), (22) АррИсаНоп: 93032399/06, 22.06.1993 (46) Бае оГ рибИсаНоп: 20.07. ...

Oil-cooled multi-part plunger piston for internal combustion engines

HIGH SPEED ENGINE

1. Двигатель (1), отличающийся тем, что топливо используется с высокой эффективностью, а потери на трение минимальны, при этом двигатель содержит по меньшей мере цилиндр (2), по меньшей мере поршень (3), который перемещается внутри цилиндра (2) и который содержит по меньшей мере выступ (6) и/или выемку (7), которые устраняют трение боковой поверхности поршня во время перемещения, по меньшей мере соединительную тягу (4), которая смещена от оси цилиндра на некоторое расстояние (х) и, в то же время, соединена с поршнем (3) под некоторым углом (α), по меньшей мере кривошип (5), который эффективен в регулировании скорости поршня (3) при его ходах благодаря γ° углу двух концов соединительной тяги (4) относительно оси цилиндра (2).2. Двигатель по п.1, отличающийся тем, что содержит по меньшей мере одну соединительную тягу (4), которая расположена между поршнем (3) и кривошипом (5) и которая соединяет поршень (3) с кривошипом (5), которая смещена от оси цилиндра (2) на некоторое расстояние (х) и которая установлена на поршне (3) под углом (α), при этом часть между верхним концом (А), который расположен под углом (α) градусов относительно поршня, и нижним концом (В), который установлен на валу кривошипа (5), может быть прямой, а также может быть других геометрических форм, в частности, криволинейной, волнистой и т.д.3. Двигатель (1) по п.1 или 2, отличающийся тем, что обеспечивает регулирование циклов всасывания, сжатия, сгорания и откачки для увеличения эффективности, при этом поршень (3) образует γ° угол относительно оси цилиндра (2), когда поршень (3) находится в верхней мертвой точке, содержит по меньшей мере одну соединительную тягу (4), которая смещает ось поворота кри� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК F02F 7/00 (11) (13) 2012 147 236 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2012147236/06, 05.04.2011 (71) Заявитель(и): ОЗДАМАР Хасан Басри (TR) Приоритет(ы): (30) Конвенционный приоритет: (72) Автор ...

Light-alloy piston for internal-combustion engine

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Thermal spraying method, method for manufacturing sliding member having sprayed layer as sliding surface, piston, and method for manufacturing piston

Rotating machine and refrigeration apparatus using the rotating machine

Method for casting cylinder piston for diesel engine

(57)【要約】 【課題】 シリンダピストンの鋳造工程において、従 来、引巣の発生を抑えるためため、押湯を施していたの で、鋳造項耐全体の中の鋳造物の歩留りが低く、生産効 率が悪くて、コスト高を招いていた。 【解決手段】 ピストンの燃焼面側頂部の外周面の稜線 より内側全面を頂部冷し金型３にて、ピストンの頂部稜 線より下側の側面全面を側面冷し金型４にて、そして、 ピストンピン孔内面またはスカート側端面をピストンピ ン冷し金型５または５’にて成形し、各冷し金型３・４ ・５は、鋳造するシリンダピストンの各部肉厚部の１／ ２〜２倍の厚さとし、押湯を不要とした。

Pistons

피스톤링 홈 및 링벨트가 형성된 크라운을 포함하고 있는 내연기관용 피스톤에 있어서, 크라운은 피스톤축에 대해 횡방향으로 배열되며 축방향으로 뻗은 2개의 웨브에 의해서 연결된 피스톤핀보스에 의해 지지되며 각각의 평평한 웨브 및 핀보스와 연결된지지 리브에 의해서 또한 지지되되 지지 리브는 크라운 하면으로부터 축방향으로 뻗어있고 평면의 웨브에 대해서 횡방향으로 뻗어있는 피스톤이 개시되어 있다. 피스톤은 관절연결 또는 단일금속 구성일 수 있다. In a piston for an internal combustion engine comprising a piston ring groove and a crown with a ring belt, the crown is supported by a piston pin boss connected by two webs arranged transversely with respect to the piston axis and extending in the axial direction, each flat Disclosed is a piston which is also supported by a support rib connected to the web and the pin boss, wherein the support rib extends axially from the lower surface of the crown and extends transverse to the planar web. The piston may be articulated or monometallic.

Piston for double-stroke diesel engine with crosshead

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: piston for double stroke engine with crosshead has number of grooves for piston rings. Piston is provided with channels to reduced pressure at some of rings with no running of channel axes onto piston ring on length from outlet holes. Total area of cross section of pressure reducing channels interrelated with separate piston ring being expressed in is within the internal from D 2 /68000 to D 2/ 10000 where D is diameter of cylinder in mm. According to invention, piston provides controllable flow of limited amount of gas seeping at least past one piston ring to decrease wear of ring and to protect rings from heavy attacks. EFFECT: reduced wear of piston rings. 10 cl, 7 dwg сорго бус ПЧ сэ (19) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ ВИ "” 2190 773 ' 5 МК’ р 02Е 3/00 13) С2 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 99121855/06, 09.03.1998 (24) Дата начала действия патента: 09.03.1998 (30) Приоритет: 14.03.1997 ОК 0286/97 (46) Дата публикации: 10.10.2002 (56) Ссылки: МО 94/12815 АЛ, 09.06.1994. ОЕ 19514918 АЛ, 24.10.1996. СВ 2104621 А, 09.03.1983. ОЕ 19520844 АЛ, 21.12.1995. 9$ 4154207 А, 15.05.1979. $Ц 88255 А, 13.01.1960. 54 1625637А\, 30.05.1991. КУ 20715171 СЛ, 23.11.1992. (85) Дата перевода заявки РСТ на национальную фазу: 14.10.1999 (86) Заявка РСТ: ОК 98/00087 (09.03.1998) (87) Публикация РСТ: М/О 98/41749 (24.09.1998) (98) Адрес для переписки: 129010, Москва, ул. Б.Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", Е_.В.Томской (71) Заявитель: МАН Б ЭНД В ДИЕСЕЛЬ А/С (ОК) (72) Изобретатель: МОЧУЛЬСКИ Лех (0К) (73) Патентообладатель: МАН Б ЭНД В ДИЕСЕЛЬ А/С (ОК) (74) Патентный поверенный: Томская Елена Владимировна (54) ПОРШЕНЬ ДЛЯ ДВУХТАКТНОГО ДИЗЕЛЬНОГО ДВИГАТЕЛЯ С КРЕЙЦКОПФОМ (57) Поршень для двухтактного двигателя с крейцкопфом имеет ряд канавок для поршневых колец. По меньшей мере у некоторых из колец поршень имеет каналы для ...

Insert-casting method of ceramic body

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

METHOD AND APPARATUS FOR PRODUCING HOLLOW RING GROOVE INSERT FOR ENGINE PISTON - Patent application

엔진용 피스톤의 상단 근처에 배치되어 링 그루브 및 상기 링 그루브에 인접한 냉각 통로를 구성하는 엔진피스톤용 중공 링 그루브 삽입물을 제조하는 방법은 원통부와 원통부와 원통부 각각의 단부로부터 외부로 연장된 원형칼라를 갖는 성형된 링 본체(10)를 제조하고 내주면 및 피스톤 링 그루브를 갖는 링 본체를 제조하고, 성형된 박판링과 상기 링 본체를 함께 결합하여 성형된 박판링의 각각의 원형칼라의 외주부가 상기 링 본체의 내주면과 맞물리게 하고, 원형칼라의 상기 외주부분 및 상기 링 본체의 상기 내주부분을 함께 결합하고, 성형된 박판링을 제조하는 단계는, 박판링(11)을 제조하고 원주방향 성형 그루브(14)를 구비한 성형다이(2)와 플로팅링의 구멍과 테이퍼를 갖는 중심부재를 맞물리거나 맞물림을 해제시키는 것에 의하여 성형 그루브에 배치되고 선택적으로 반경방향으로 이동 가능한 상태 또는 상기 성형다이의 축선 중심과 일치하여 중심에 놓여 고정되는 상태에 이를 수 있는 플로팅 링(4)과, 성형 그루부의 폭보다 더 작은 소정의 폭을 갖는 성형롤(5)과, 절단공구(8) 및 디버링 공구(9)를 갖는 제조장치를 마련하고, 박판링을 성형다이 상에 끼워맞추어 박판링이 성형 그루브(14)를 덮고, 반경방향으로 이동할 수 있는 플로팅링과 함께 성형다이를 회전시키는 동안 성형롤을 박판링에 대하여 반경방향 내부로 가압하여 박판링 상에 원형칼라를 형성하고, 성형다이의 축선 중심과 일치하여 중심에 놓여 고정된 상태로 배치된 플로팅 링과 함께 성형다이를 회전시키는 동안 절단공구(8)를 원형칼라의 외주부분에 대해 가압하여 원형칼라의 외주부분을 선삭하고, 성형다이의 축선 중심과 일치하여 중심에 놓여 고정된 상태로 배치된 플로팅링과 함께 성형다이를 회전시키는 동안 디버링도구(8)를 원형칼라의 외주부분에 대해 가압하여 원형칼라로부터 버르를 제거하는 중공 링 그루브 삽입물 제조방법.

Combination of member

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Piston ring for an internal combustion engine

Die vorliegende Erfindung betrifft einen Kolbenring (10, 110, 210, 310, 410, 510, 610) für Kolben von Verbrennungsmotoren, mit einer Ringlauffläche (14), einem Ringrücken (11), einer oberen Ringflanke (12), einer unteren Ringflanke (13) sowie mit zwei durch einen Spalt beabstandeten Ringstoßenden (15). Erfindungsgemäß ist vorgesehen, dass in der Ringlauffläche (14) mindestens eine Öffnung (17, 117, 121, 217, 223, 325, 427) vorgesehen ist, die eine Fluidverbindung zwischen der Ringlauffläche (14) und dem Ringrücken (11) oder einer Ringflanke (12, 13) bildet. The present invention relates to a piston ring (10, 110, 210, 310, 410, 510, 610) for pistons of internal combustion engines, having a ring running surface (14), a ring back (11), an upper ring flank (12), a lower ring flank ( 13) and with two spaced apart by a gap ring butt ends (15). According to the invention, provision is made for at least one opening (17, 117, 121, 217, 223, 325, 427) in the ring running surface (14) to provide a fluid connection between the ring running surface (14) and the ring back (11) or a ring flank (12, 13) forms.

Manufacture of ceramic incorporated type engine piston

Method of and apparatus for producing hollow ring groove insert for engine piston

엔진용 피스톤의 상단 근처에 배치되어 링 그루브 및 상기 링 그루브에 인접한 냉각 통로를 구성하는 엔진피스톤용 중공 링 그루브 삽입물을 제조하는 방법은 원통부와 원통부 각각의 단부로부터 외부로 연장된 원형칼라를 갖는 성형된 링 본체(10)를 제조하고 내주면 및 피스톤 링 그루브를 갖는 링 본체를 제조하고, 성형된 박판링과 상기 링 본체를 함께 결합하여 성형된 박판링의 각각의 원형칼라의 외주부가 상기 링 본체의 내주면과 맞물리게 하고, 원형칼라의 상기 외주부분 및 상기 링 본체의 상기 내주부분을 함께 결합하고, 성형된 박판링을 제조하는 단계는, 박판링(11)을 제조하고 원주방향 성형 그루브(14)를 구비한 성형다이(2)와 플로팅 링의 구멍과 테이퍼를 갖는 중심부재를 맞물리거나 맞물림을 해제시키는 것에 의하여 성형 그루브에 배치되고 선택적으로 반경방향으로 이동 가능한 상태 또는 상기 성형다이의 축선 중심과 일치하여 중심에 놓여 고정되는 상태에 이를 수 있는 플로팅 링(4)과, 성형 그루브의 폭보다 더 작은 소정의 폭을 갖는 성형롤(5)과, 절단공구(8) 및 디버링 공구(9)를 갖는 제조장치를 마련하고, 박판링을 성형다이 상에 끼워맞추어 박판링이 성형 그루브(14)를 덮고, 반경방향으로 이동할 수 있는 플로팅 링과 함께 성형다이를 회전시키는 동안 성형롤을 박판링에 대하여 반경방향 내부로 가압하여 박판링 상에 원형칼라를 형성하고, 성형다이의 축선 중심과 일치하여 중심에 놓여 고정된 상태로 배치된 플로팅 링과 함께 성형다이를 회전시키는 동안 절단공구(8)를 원형칼라의 외주부분에 대해 가압하여 원형칼라의 외주부분을 선삭하고, 성형다이의 축선 중심과 일치하여 중심에 놓여 고정된 상태로 배치된 플로팅 링과 함께 성형다이를 회전시키는 동안 디버링도구(8)를 원형칼라의 외주부분에 대해 가압하여 원형칼라로부터 버르를 제거하는 중공 링 그루브 삽입물 제조방법. A method of manufacturing a hollow ring groove insert for an engine piston disposed near an upper end of an engine piston and constituting a ring groove and a cooling passage adjacent to the ring groove includes a circular collar extending outwardly from an end of each of the cylindrical portion and the cylindrical portion. And a ring body having an inner circumferential surface and a piston ring groove, and combining the molded thin plate ring and the ring body together to form an outer peripheral portion of each circular collar of the formed thin plate ring. Engaging the inner circumferential surface of the main body, combining the outer circumferential portion of the circular collar and the inner circumferential portion of the ring main body together, and manufacturing the formed thin ring, the manufacturing of the thin plate ring 11 and the circumferential forming groove 14 ) Is placed in the forming groove by engaging or releasing the forming die 2 having a) and the core member having the hole and taper of the floating ring. And a floating ring 4 ...

Scroll compressor (versions)

FIELD: machine building. SUBSTANCE: scroll compressor 1 is supported with possibility of sliding by means of the journal bearing with rotating shaft 3, installed in the casing 2. The compressor uses the journal bearing created by sintering on metal backup of the sliding layer, in which graphite with high degree of graphitization and definite shape, is dispersed in polymer. EFFECT: increased durability and weight-saving of the compressor, reduced noise. 14 cl, 2 tbl, 9 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 567 486 C1 (51) МПК F04C 18/02 (2006.01) F04C 29/00 (2006.01) F16C 17/02 (2006.01) F16C 33/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014118459/06, 10.08.2012 (24) Дата начала отсчета срока действия патента: 10.08.2012 Приоритет(ы): (30) Конвенционный приоритет: (45) Опубликовано: 10.11.2015 Бюл. № 31 (73) Патентообладатель(и): ТАИХО КОГИО КО., ЛТД. (JP) (85) Дата начала рассмотрения заявки PCT на национальной фазе: 07.05.2014 (86) Заявка PCT: JP 2012/070490 (10.08.2012) 2 5 6 7 4 8 6 (56) Список документов, цитированных в отчете о поиске: JP 2004293331 A, 21.10.2004JPH07223809 A, 22.08.2995JPH07223808 A, 22.08.1995JP 2517604 B2,24.07.1996RU 2055239 C1, 27.02.1996 R U 07.10.2011 JP 2011-223245 (72) Автор(ы): ХОРИБЕ Наоки (JP), ХАТТА Масахару (JP), НОМУРА Сатоси (JP), САВАМОТО Акира (JP), МАСАМУРА Такао (JP), АКИДЗУКИ Масанори (JP), ЦУБОИ Еуитироу (JP), АОКИ Маки (JP), ХИРАОКА Акио (JP) 2 5 6 7 4 8 6 R U WO 2013/051340 (11.04.2013) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и партнеры" (54) СПИРАЛЬНЫЙ КОМПРЕССОР (ВАРИАНТЫ) (57) Реферат: Группа изобретений относится к компрессору, скольжения, образованный спеканием на металле используемому в автомобильных кондиционерах подкладки слоя скольжения, в котором графит, или бытовых кондиционерах, и, в частности, к имеющий высокую степень графитизации и спиральному компрессору. ...

Gears and gear assemblies

Improvements in gears and gear teeth structures for use in driving assemblies, such as machines, vehicles and the like, wherein the teeth portions of the gears and, in certain instances, other portions thereof, are coated with a hard synthetic diamond material deposited thereagainst as carbon atoms derived from a fluid, such as methane gas, when high energy radiation, such as microwave radiation, is beamed through the gas against the surfaces of the gears and gear teeth thereof. In certain instances, the hard diamond material coating the gear teeth and the spaces therebetween, is overcoated with a thin layer of chromium which serves to protect the diamond surfaces of the teeth during use so as to prevent destruction of the diamond layer by physical attrition caused by stress and abrasive particles engaging the teeth during use of the gears. In a particular form of the invention, two or more gears having their teeth similarly coated with synthetic diamond material are assembled in meshing engagement with each other and a coating of chromium disposed on the outer surfaces of the diamond material coating the teeth serves to lubricate and protect the diamond coating against destruction or attrition as the gears mesh and are driven with respect to each other.

Manufacturing method of piston

Piston for internal combustion engines with a piston crown or piston top

Kolben für Verbrennungsmotoren mit einem Kolbenboden oder einem Kolbenoberteil, bei dem zumindest die brennraumseitige Oberfläche des Kolbenbodens aus Aluminium, Stahl, Eisen oder einer Eisenbasis-Legierung besteht, insbesondere Gelenkkolben, gebaute Kolben oder Kolben, die vollständig aus Aluminium, Stahl, Eisen oder einer Eisenbasis-Legierung bestehen, bei dem die brennraumseitige Oberfläche des Kolbenbodens bzw. Kolbenoberteils zumindest teilweise eine Beschichtung mit einem anorganischen Hochtemperatur-Lack aufweist, dadurch gekennzeichnet, dass die anorganische Beschichtung zumindest teilweise aus Polyphosphaten besteht, die einer Verzunderung der beschichteten Oberfläche entgegenwirkt. piston for internal combustion engines with a piston head or a piston upper part, wherein at least the combustion chamber side surface the piston crown made of aluminum, steel, iron or an iron-based alloy consists, in particular, of articulated pistons, built-up pistons or pistons, the complete made of aluminum, steel, iron or an iron-based alloy the combustion chamber side surface the piston crown or upper piston part at least partially a coating having an inorganic high-temperature paint, characterized that the inorganic coating is at least partially made of polyphosphates exists, which counteracts a scaling of the coated surface.

Improvements in or relating to pistons

A piston comprises a crown (10) and a ring band (11) carried on two gudgeon pin bosses (12a, 12b) by two supports (20). There are upper and lower pairs of struts (21a, 21b, 21c, 21d) on each side of the gudgeon pin bosses, one strut of each pair projecting from one gudgeon pin boss and the other strut of each pair projecting from the other gudgeon pin boss. Each pair carries a respective arcuate skirt portion (22) which extends only part the way round the and is symmetrical about a plane including the piston axis (28) and normal to the gudgeon pin bore axis. There are thus axially and circumferentially extending gaps (25) of constant axial width both between the upper arcuate skirt portions and the ring band and between the upper arcuate skirt portions and the lower arcuate skirt portions. This provides a lightweight piston which is very conformable and can be fitted tightly in an associated cylinder or liner to reduce noise.

Piston-cylinder assembly of an internal combustion engine

In a piston-cylinder assembly of an internal combustion engine, especially a two-stroke engine, at least the piston-sliding surface of the cylinder is made of an aluminium alloy. Moreover, the basic material of the piston (1) is an alluminium alloy and at least 80 % of its sliding surface is given a sliding coating (3, 4). The sliding coating (3, 4) on the piston (1) is usually metallic and galvanically applied. The aim is to provide an economically producible piston coating with properties at least as good as those of the former galvanically applied coatings. To this end the cylinder sliding surface has a roughness Ra of less than 1 mu m, while the piston sliding surface consist of resin-bound graphite. The piston rings (6) are made of cast iron or steel and have a convex sliding surface.

A movable wall member in form of an exhaust valve spindle or a piston for an internal combustion engine, and a method of manufacturing such a member

내부 연소 엔진을 위한 배기 밸브 스핀들 또는 피스톤 형태의 가동 벽 부재 및, 가동 벽 부재의 제조 방법이 개시된다. Disclosed are a movable wall member in the form of an exhaust valve spindle or piston for an internal combustion engine, and a method of manufacturing the movable wall member. 내부 연소 엔진을 위한 피스톤(7) 또는 배기 밸브 스핀들(1)의 형태인 가동 벽 부재(movable wall member)는, 중량으로 0.15 내지 0.35 % 범위의 탄소-함량을 가진 합금 스틸의 베이스 부분(17,20) 및, 연소 챔버를 향하는 벽 부재의 표면을 형성하는 외측 부분(14,5)을 포함한다. 외측 부분은, 니켈-베이스이거나, 크롬-베이스이거나 또는 코발트-베이스인, 고온 부식 저항 합금이다. 합금의 적어도 하나의 버퍼 층(18,21)은 베이스 부분과 외측 부분 사이에 위치된다. 버퍼 층의 합금은, 베이스 부분의 합금 스틸과 상이하고 외측 부분의 고온 부식 저항 합금과 상이하다. 버퍼 층의 합금은 버퍼 층의 중량 백분율로 0 % 내지 많아도 0.09 % 의 C 를 포함하고, 버퍼 층은 적어도 1.5 mm 의 두께를 가진다. A movable wall member in the form of a piston 7 or exhaust valve spindle 1 for an internal combustion engine comprises a base portion 17 of alloy steel having a carbon-content in the range of 0.15 to 0.35% by weight. 20) and outer portions 14, 5 forming the surface of the wall member facing the combustion chamber. The outer portion is a high temperature corrosion resistant alloy, either nickel-based, chromium-based or cobalt-based. At least one buffer layer 18, 21 of the alloy is located between the base portion and the outer portion. The alloy of the buffer layer is different from the alloy steel of the base portion and from the high temperature corrosion resistant alloy of the outer portion. The alloy of the buffer layer comprises 0 to at most 0.09% of C by weight percentage of the buffer layer, and the buffer layer has a thickness of at least 1.5 mm.

Piston for an internal combustion engine and method for its production

Vorgeschlagen wird ein Kolben (1) für einen Verbrennungsmotor mit einem nahe dem Kolbenboden (5) und radial außen angeordneten, geschlossenen Ringkanal (4), der kolbenbodenseitig eine ringförmige Öffnung (21) aufweist, die im Schnitt die Form eines Trapezes mit in kolbenbodenabgewandte Richtung konisch zulaufenden Schenkeln hat und die von einem ringförmigen Verschlusselement (3) verschlossen ist, das im Schnitt die gleiche Trapezform wie die Öffnung (21) aufweist, wobei das Verschlusselement (3) in der Öffnung (21) mittels Reibschweißen befestigt ist. Proposed is a piston (1) for an internal combustion engine with a close to the piston head (5) and radially outwardly arranged, closed annular channel (4), the piston crown side has an annular opening (21), which in section the shape of a trapezium with in kolbenbodenabgewandte direction has tapered legs and which is closed by an annular closure element (3) having in section the same trapezoidal shape as the opening (21), wherein the closure element (3) in the opening (21) is secured by friction welding.

piston

Pistons

This invention relates to a piston for an internal combustion engine, compressor or the like, which is composed of at least two mating parts, for example a light alloy piston body part and a wear-resistant ring groove carrier part or heat-resistant crown part, the parts being permanently assembled together by friction welding. The invention also relates to a method of making such pistons.

One-piece integral skirt piston and method of making the same

A one-piece piston (20) formed by an upper crown (28) and a lower crown (30) having an integral skirt (24, 26). The upper crown (28) includes an upper surface (32) and a lower surface (34, 42). The lower crown (30) includes an upper surface (50) and two pin bosses (52, 54). The upper crown (28) has a first collar (44) and the lower crown (30) has a second collar (64). In addition, skirt ribs (24, 26) connect the two pin bosses (52, 54). The first and second collars (44, 64) are secured together to form the one-piece piston (20).

Method and apparatus for making a two piece unitary piston

Past pistons have been susceptible to reduced longevity due to increased forces of combustion thereon during operating cycles of an engine. The present two piece unitary piston (30) increases the longevity of pistons used with increased forces of combustion. For example, a head member (42) has a bottom surface (70) and a support surface (94). And, a skirt member (44) defines an upper outer support surface (113) and an upper inner support surface (111). The head member (42) and the skirt member (44) have a preestablished material strength being generally the same. The head member (42) and the skirt member (44) are joined at an interface of the bottom surface (70) and the upper outer support surface (113) and the interface of the support surface (94) and the upper inner support surface (111) respectively by a welding process (170). The force of combustion acting on the crown portion (60) is resisted by the upper outer support surface (113) being in contacting relationship with the bottom surface (70). Thus, the skirt member (44) structure supports and resists the bending moment of the combustion forces on the head member (42).

Method of manufacturing piston of internal combustion engine

The top land section 2 and the skirt section 3 of a piston of an internal combustion engine are separately formed by forging a metal material that shows a satisfactory level of strength and can easily be cut. A ring member 9 of a thermally resistive metal material is bonded by forging to the periphery of the opening of the cavity 7 of the piston and the top land section 2 and the skirt section 3 are bonded along the dividing surfaces 10 by solid phase bonding, diffusion bonding or electron beam welding. Alternatively, the top land section 2 and the skirt section 3 may be formed separately by forging so as to produce an annular cavity 8 when they are bonded together along the dividing surfaces 30 that are exposed to the annular cavity 8 by solid phase bonding, diffusion bonding or electron beam welding.

Dual gallery piston

A heavy duty diesel piston includes upper and lower portions joined across a friction weld and internally contoured to provide a dual gallery structure including an outer annular gallery and a central gallery joined by passages for communicating cooling oil therebetween. The dual-gallery structure allows oil to enter from the outer gallery, which is formed by the circumferential annular recess in the crown and crown bottom, into the central gallery to cool the piston and particularly the central crown region exposed to hot combustion gases. The friction weld provides high structural integrity and minimizes the number of manufacturing steps need to attach the crown to the crown bottom.

Bonding a component in a piston

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