| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 029888040 | Piston making | 45 |
| 20080209725 | Method For Producing a Piston For an Internal Combustion Engine - The invention relates to a method for producing a piston for a combustion engine comprising a combustion recess, during which an annular fiber preform for reinforcing the edge of the combustion recess is firstly fastened inside the casting mold. Afterwards, a low-silicon aluminum/copper melt is introduced into the casting mold by which the fiber preform is infiltrated and molded into the recess edge within the scope of the casting process. The piston blank produced in this manner is then subsequently compacted by a high-temperature isostatic pressing before the piston is completed by means of a machining completion process. The flanks and the base areas of the second and third annular groove are coated by means of anodic oxidation, and the hub boreholes are smoothed and hardened by roller-burnishing. This results in a very high-quality and heavy-duty piston. | 09-04-2008 |
| 20090013531 | Method, production line, and piston blank used for the production of a monolithic piston for combustion engines, and piston for combustion engines - A method and a manufacturing line allow for the manufacture of piston blanks of dimensions close to the final dimensions, which in the course of subsequent finish-machining need only be machined with removal of material to a small degree. A piston shaft of the piston blank is produced by backward extrusion. At least one hollow throat element is already produced at the piston blank by an upset-forging operation. For this purpose, a special forging tool is provided, which, after the manufacture of the piston shaft, takes effect on the piston blank in such a way that at least one hollow throat element is formed at the latest at subsequent forming of the piston base. In this way, a perceptible reduction is achieved in the weight of a piston in relation to conventionally manufactured forging pistons. | 01-15-2009 |
| 20090071001 | METHOD FOR PRODUCING PISTON FOR INTERNAL-COMBUSTION ENGINE - A method is provided for producing a piston for an internal-combustion engine of the structure in which a piston body which is composed of a crown having a groove for fitting a piston ring into an outer circumference surface and a skirt in connection with the bottom of the crown is provided with an annular cavity for flowing cooling liquid on an inside of the groove, the method comprising the steps of: forming the crown and the skirt individually; forming an annular groove for the annular cavity in the inner bottom of the crown and an annular rib in connection with the open edge of the annular groove before the crown and the skirt are joined together; bending the rib toward the opening of the annular groove by application of pressure to close the opening of the annular groove to thereby form the annular cavity; and joining the crown and the skirt together. | 03-19-2009 |
| 20100139091 | CONNECTING ROD - A connecting rod and methods for making the same are disclosed. A method of making a connecting rod may include joining a first connecting rod blank and a second connecting rod blank together. The first connecting rod blank includes a first material, while the second connecting rod blank includes a second material different from the first material. The first and second connecting rod blanks have an interface between the piston pin and crankshaft ends. The method further includes narrowing a cross-section of the blanks at the interface, forming a piston pin aperture in the first connecting rod blank, and forming a crankshaft pin aperture in the second connecting rod blank. At least one of the narrowing and forming steps works a perimeter of the interface, thereby forming a generally smooth connecting rod surface about the perimeter of the interface. | 06-10-2010 |
| 20100186232 | PRODUCTION METHOD OF PISTON FOR COMPRESSOR - A method for producing a hollow piston for compressor by coupling a piston top side member and a rotation preventing portion side member where a rotation preventing portion and a cylindrical portion are formed integrally. When the rotation preventing portion side member is formed, an intermediate material for forging the rotation preventing portion side member is formed, the cylindrical portion of the rotation preventing portion side member is forged in a uniaxial direction by molding for pushing the cylindrical portion rearward in a punch inserting direction using a punch having a tip portion formed asymmetrically to a piston axis, and a material theft portion is formed to copy the asymmetric profile at the tip of the punch on the rotation preventing portion side bottom of the hollow section for forming the cylindrical portion. A hollow piston can be produced by simple and inexpensive forging and the position of the center of gravity can be brought closer to the axis of the cylindrical portion of the piston. | 07-29-2010 |
| 20110119914 | Piston For Internal Combustion Engines, Produced By Means of a Multi-Orbital Friction Welding Method - A method for producing a piston of an internal combustion engine, designed as a one-piece cooling channel piston. The piston includes an upper part and a lower part supported by corresponding circumferential joining bosses together forming a joining zone. In order to produce a bonded joint of the upper part and the lower part, the joining bosses are connected by means of multiorbital friction welding in the region of a rotationally symmetrical or rotationally asymmetrical joining zone. | 05-26-2011 |
| 20120073133 | PISTON FOR A HYDRAULIC MOTOR HAVING RADIAL PISTONS, AND A METHOD OF MANUFACTURING SUCH A PISTON - A piston for a hydraulic motor including a body having a guiding and sealing surface, a base, and a top, which top is providing with a cradle-shaped recess. The base is provided with an additional cradle-shaped recess whose concave surface faces in the direction in which the concave surface of the recess in the top faces. | 03-29-2012 |
| 20120151766 | MULTI-PART PISTON FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR ITS PRODUCTION - A method for the production of a multi-part piston for an internal combustion engine involves producing an upper piston part having a piston crown as well as an inner and an outer support element, and producing a lower piston part having a skirt and having pin boss supports and pin bosses connected with the pin boss supports, and an inner and an outer support element. A separate cooling oil collector having at least one cooling oil opening is inserted into the upper piston part or the lower piston part. The upper piston part and the lower piston part are connected in such a manner that the inner and outer support elements of the upper and lower piston parts, delimit an outer circumferential cooling channel and a cavity that is open toward the pin bosses and provided with the cooling oil collector. | 06-21-2012 |
| 20120255171 | SYSTEMS AND METHODS FOR MANUFACTURING A PISTON - One example embodiment includes a system for manufacturing a piston. The system includes a holding device, where the holding device is configured to hold a piston during manufacture. The system also includes a locating ball. The locating ball is attached to the holding device and is configured to mate with a depression in the piston. | 10-11-2012 |
| 20130000120 | METHOD FOR PRODUCING AN ALUMINUM PISTON FOR AN INTERNAL COMBUSTION ENGINE - A method for producing an aluminum piston for an internal combustion engine, which piston is designed as a round skirt piston. In the region of the radially outer end faces of the piston pin bosses the piston skirt has skirt recesses extending in the direction of the piston axis. In order to be able, when using the piston, to produce skirt recesses that have any shape a piston blank is produced in a forging process using a forging die, which piston blank has inner faces that are complementary to the outer shape of the piston having skirt recesses and not-recessed regions of the piston skirt, and the piston blank can then be further machined to produce the aluminum piston. | 01-03-2013 |
| 20130036608 | FORGING METHOD FOR PRODUCING A PISTON OR PISTON SKIRT - A forging method for producing a piston skirt having two skirt walls and two box walls connecting the skirt walls may include forging, to the piston skirt, the skirt walls at least slightly conically towards the outside of the piston skirt via a first forging die. The box walls may be forged to the piston skirt, wherein each box wall has a hub inside and a hub outside. The box walls may be moulded via a second forging die, wherein the hub outside of each box wall runs at least one of substantially parallel to the piston axis and slightly sloping to an outside of their hub inside towards a free end of the piston skirt to the outside. The skirt walls may be drawn, simultaneously with moulding of the box walls, into a position that is approximately parallel to the piston axis. | 02-14-2013 |
| 20140190010 | PROCESS FOR PRODUCING A PISTON FOR AN INTERNAL COMBUSTION ENGINE AND PISTON FOR AN INTERNAL COMBUSTION ENGINE - In a process for producing a piston for an internal combustion engine, a groove is worked into a cast piston blank proceeding from a combustion chamber cavity ( | 07-10-2014 |
| 20140202001 | METHOD FOR THE PRODUCTION OF A PISTON FOR AN INTERNAL COMBUSTION ENGINE - A method for producing a piston from an upper piston part and a lower piston part. A strip- or plate-shaped semifinished product made of a metal material is provided, from which an annular upper piston part or an annular blank is stamped out, which blank is finished to form an upper piston part, wherein the upper piston part is connected to a lower piston part to form a piston. | 07-24-2014 |
| 20150082632 | METHOD FOR PRODUCING AN ALUMINUM PISTON - A method for producing an aluminum piston for an internal combustion engine may including providing a piston bowl having a bowl edge and a bowl base; subjecting an area of at least one of the bowl edge and the bowl base to a welding treatment to introduce at least one additional element into a base material of the piston bowl and to produce intermetallic phases in the base material; the welding treatment may introduce at least one of the following additional elements at the specified concentrations, 1-7 wt. percentage of Ni, 1-15 wt. percentage of Cu and 1-5 wt. percentage of Fe. | 03-26-2015 |
| 20150107106 | METHOD FOR PRODUCING A PISTON WITH A COOLING DUCT - A method for producing a piston with a cooling duct for an internal combustion engine, wherein a piston blank is provided with a collar protruding beyond the outer diameter of the later formed piston, and is formed on the piston blank by forging, spin-bending or the like. To form the cooling duct, a radially peripheral recess is introduced into the piston blank by forging, spin-bending or the like. In a further method step, a forming operation is performed on the collar, which together with the peripheral recess forms the cooling duct. | 04-23-2015 |
| 20150336550 | VACUUM BOOSTER, BRAKE SYSTEM EQUIPPED WITH THE VACUUM BOOSTER, AND METHOD OF MANUFACTURING PLATE PLUNGER FOR VACUUM BOOSTER - A method of manufacturing a plate plunger with which a reaction disc comes into contact and which determines a servo ratio of a vacuum booster, the plate plunger manufacturing method comprising primarily processing a plate plunger base material in such a way that an outer peripheral diameter of a reaction disc contact surface of the plate plunger becomes equal to or greater than an outer peripheral diameter, and forming the reaction disc contact surface of the plate plunger in such a way that it has an outer peripheral diameter corresponding to a desired servo ratio by secondarily processing a servo ratio determination surface. | 11-26-2015 |
| 20160199952 | STEEL PISTON WITH COUNTER-BORE DESIGN | 07-14-2016 |
| 029888042 | Multi-element piston making | 8 |
| 20090277008 | METHOD FOR MANUFACTURING A PISTON DEVICE - A method for manufacturing a piston device, comprises the following steps. Processing a first raw material to form a piston with a top surface and a bottom surface. Processing a second raw material to have the diameter of said second raw material slightly larger than the diameter of said piston. Cutting the second raw material into a plural cylinders. Mounting the annular component on the top surface or the bottom surface through the convex portion. The durability and the life cycle of the piston device can be extended by mounting the annular component onto the piston. | 11-12-2009 |
| 20110030214 | PISTON ASSEMBLY MULTIPLE STEP FORMING PROCESS - A method of creating a piston crown is disclosed. The method includes the step of providing a billet and then upsetting the billet in a first station to generally decrease a length of the billet and generally increase a cross section of the billet. The billet is then pre-formed in a second station into an intermediate configuration of a piston crown, where the piston crown is in a preliminary shape. The first station and the second station are separate components. The intermediate configuration of the piston crown is formed into a final shape of the piston crown, where the final shape includes a predetermined volume. The piston crown is then precision formed into a near net shaped configuration, where the near net shaped configuration of the piston crown includes a near net shaped volume. The predetermined volume may be approximately equal to the near net shaped volume. | 02-10-2011 |
| 20120131795 | METHOD FOR THE PRODUCTION OF A MULTI-PART PISTON FOR AN INTERNAL COMBUSTION ENGINE - A multi-part piston for an internal combustion engine has an upper piston part having a piston crown, and a lower piston part. The lower piston part has pin boss supports and pin bosses connected with them and the upper piston part and the lower piston part each have an inner and an outer support element, which elements delimit an outer circumferential cooling channel. The inner support elements delimit a cavity that is open toward the pin bosses. The cavity has a separate cooling oil collector that has at least one cooling oil opening. The piston is produced by manufacturing the upper piston part and lower piston part, inserting the cooling oil collector into the upper piston part or lower piston part, and joining the upper and lower piston parts together by friction welding. | 05-31-2012 |
| 20120222304 | Method for the production of a piston for an internal combustion engine - What is proposed is a method for the production of a piston ( | 09-06-2012 |
| 20120222305 | Method for the production of a piston for an internal combustion engine - What is proposed is a method for the production of a piston ( | 09-06-2012 |
| 20150101191 | 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. | 04-16-2015 |
| 029888043 | Utilizing a high energy beam, e.g., laser, electron beam | 2 |
| 20110167632 | DEVICE AND METHOD FOR MACHINING AND ASSEMBLING A PISTON - A device for machining and assembling a piston, comprising, a piston upper part; and a piston lower part; an upper work spindle and a lower work spindle, wherein the upper and lower work spindles are arranged coaxially to one another and are at least one of -actuated independently of one another and actuated together, such that one work spindle supports the piston upper part and the other work spindle supports the piston lower part; and a first and second tool carriage, wherein the tool carriages are actuated independently of one another, such that one tool carriage supports a tool for machining the piston upper part and the other tool carriage supports a tool for machining the piston lower part, wherein the device is configured such that both of the piston upper and lower parts are machined independently of one another, aligned with regard to one another, and joined to one another such that the piston parts remain clamped to the tool carriages in the interim. | 07-14-2011 |
| 20140137405 | METHOD FOR THE PRODUCTION OF A PISTON FOR AN INTERNAL COMBUSTION ENGINE - A method for producing piston for an internal combustion engine which has a piston head that has a circumferential cooling channel as well as a combustion bowl having a circumferential bowl wall that makes a transition into a piston crown by way of a bowl edge region. The combustion bowl is formed at least in part by a piston base body and the bowl wall is formed at least in part from an insert. The insert is connected with the piston base body by means of beam welding. A lower weld. seam is configured in the bowl wall, which seam encloses an acute angle with the piston center axis (M) and ends in the lower half of the cooling channel. An upper weld seam runs from the cooling channel ceiling to the piston crown and is disposed centered or radially offset toward the outside, with reference to the clear width of the cooling channel. | 05-22-2014 |
| 029888044 | With assembly or composite article making | 14 |
| 20080263861 | Method for screwing two metal parts together - A method for screwing together two metal parts that are spaced apart from one another close to a screw connection element and elastically deformable relative to one another, and for the remainder lie against one another. In order to obtain a firm and secure screw connection, with little expenditure of torque, one of the metal parts is deformed, before the metal parts are screwed together, in such a manner that regions close to the screw connection element come close to one another, and the metal parts are then screwed together. A region of the one metal parts remains deformed after they have been screwed together, as a result of the screw connection element. | 10-30-2008 |
| 20080295331 | Method and Apparatus for Inserting a Piston Pin Locking Ring - A process for inserting a piston pin locking ring, particular slotted snap ring, into a locking groove of a pin bore of a piston. The piston pin locking ring is radially pre-tightened and reduced in size in a first step in such a manner that its outside diameter becomes smaller than the inner diameter of the pin bore. The piston pin locking ring is subsequently introduced in the pre-tightened state into the pin bore without contact and without contacting the inner wall of the pin bore and is brought in position inside the pin bore in the area of the locking groove. Then the piston pin locking ring is freed by a relaxing and loosening of the tightening force and by springing into the locking groove and is thus fixed in place. | 12-04-2008 |
| 20090172944 | SELF-TIGHTENING COVER FOR PUMP - A self-tightening retaining system for securing a closure in position closing an access port of a pump housing. The system includes a retaining cover for obstructing removal of the closure from a bore of the access port. The cover has external threads interengageable with screws threads of the bore. A locking device is configured for being secured to the cover such that the locking device rotates together with the cover. The locking device has a fastener receivable in a hole of the closure and has external threads interengageable with threads of the hole. The threads of the cover and the threads of the fastener are spiraled in opposite directions such that when the cover rotates in a loosening direction, the fastener becomes tightened in the hole of the closure thereby stopping the rotation. | 07-09-2009 |
| 20100299922 | COOLING DUCT PISTON FOR AN INTERNAL COMBUSTION ENGINE - A method for producing a piston for an internal combustion engine, designed as a cooling duct piston for small compression heights. The piston includes a lower part and an upper part which are supported by one or more corresponding joining planes and are connected of a friction welding process. The piston encloses an inner, trough-shaped cooling duct and an outer cooling duct which is axially spaced apart from an annual area. The inner cooling duct is formed in the lower part of the piston by a mechanical machining process, such as a forging process. Transfer openings which are assigned to the cooling ducts are formed before the frictional welding of the joining planes. | 12-02-2010 |
| 20110146074 | REINFORCED DUAL GALLERY PISTON AND METHOD OF CONSTRUCTION - A method of friction welding a piston includes forming a piston body by friction welding an upper crown portion to a lower crown portion. At least one of the upper or lower crown portions is provided with a central support post extending along a central axis. The upper and lower crown portions have annular ribs radially outwardly from the central support post, with the ribs being aligned with one another. The method includes initiating a friction weld joint between a free end of the central support post and a corresponding surface opposite the free end of the central support post. Then, after initiating the weld joint between the central support post and the opposite surface, the method continues by then initiating a friction weld joint between aligned free ends of the ribs. Then, the friction weld joints are completed. | 06-23-2011 |
| 20130269187 | PISTON ASSEMBLING APPARATUS AND PISTON ASSEMBLING METHOD - A piston assembling apparatus includes a piston holding means including a guide tube portion which contains the piston and guides the piston into the cylinder bore. A guide tube support portion supports the guide tube portion to be displaceable in a radial direction thereof. A moving means moves at least one of the piston holding means and the cylinder block so as to locate them at an insertion preparation position where the guide tube portion and the cylinder bore are coaxial with each other. A pressing means presses the piston contained in the guide tube portion toward the cylinder block to insert the piston into the cylinder bore in a state in which the piston holding means and the cylinder block are located at the insertion preparation position, and the guide tube portion is supported by the guide tube support portion to be displaceable in the radial direction thereof. | 10-17-2013 |
| 20150135533 | METHOD FOR PRODUCING A PISTON FOR AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for producing a piston ( | 05-21-2015 |
| 20150360335 | PISTON RAIL RING INSTALLER AND METHOD - A ring installer and method for installing piston rings on a piston includes an axial pusher, a radial pusher and a translating device. The axial pusher axially moves a cartridge of piston rail rings to position an end rail ring of the piston rail rings into a preinstall position. The radial pusher radially enlarges the end rail ring to separate the end rail ring from the piston rail rings. The translating device receives the end rail ring from the radial pusher and axially moves the end rail ring to an install position that is axially spaced apart from the cartridge of piston rail rings and from the preinstall position wherein the end rail ring is in alignment with a piston groove of the piston. | 12-17-2015 |
| 20160018031 | PISTON ACTUATED ROTARY UNION - A rotary union includes a housing forming a bore and a piston bore having an open end and disposed at a radially offset distance with respect to the bore. The piston bore is fluidly isolated from the bore. A seal carrier is slidably disposed within the bore, and includes an actuation arm extending radially outwardly relative to the bore such that it overlaps the piston bore. A piston slidably disposed in the piston bore is extendible to releasably abut the actuation arm and urge the seal carrier to displace relative to the bore when the piston displaces relative to the piston bore. | 01-21-2016 |
| 20160129536 | Method for Producing a Piston Pump - A method is used to produce a piston pump having a housing and a piston subassembly. The piston subassembly is displaceably guided in the housing and has a first, rod-like piston element and a second, sleeve-like piston element. The second piston element is connected to the first piston element via a press fit. At least one transverse bore and a longitudinal bore are arranged in the second piston element. A stop edge for the housing is arranged on the second piston element. The piston subassembly also has an inlet valve, which includes a receiving element, in which an inlet valve spring and an inlet valve sealing element are arranged. The piston subassembly also has a corresponding inlet valve seat, which is arranged on the second piston element. While the second piston element is being machined, the press fit and the longitudinal bore are produced and/or finished in one step. | 05-12-2016 |
| 20160199951 | PISTON ROD MANUFACTURING METHOD | 07-14-2016 |
| 029888045 | With thermal barrier or heat flow provision | 2 |
| 20110192023 | Method for the production of a piston for an internal combustion engine - A method for the production of a piston for an internal combustion engine is proposed, in which a piston blank ( | 08-11-2011 |
| 20140317924 | METHOD FOR BONDING PISTON COMPONENTS - An exemplary method of making a piston assembly may include providing a piston crown defining at least in part an upper combustion bowl surface. The piston crown includes at least one crown mating surface. The method further comprising moving the crown mating surface in proximity to a skirt mating surface defined by a piston skirt, wherein the crown and skirt cooperate to define a cooling gallery extending about a periphery of the crown. The method may further include bonding the crown and skirt together by initiating an electric current along a conductive path between the crown and skirt mating surfaces, the conductive path comprising at least one conductive material extending from the crown mating surface to the skirt mating surface. | 10-30-2014 |
| 029888047 | By composite casting or molding | 1 |
| 20120297619 | METHOD OF PRODUCING HOLLOW CASTING AND METHOD OF PRODUCING PISTON OF INTERNAL COMBUSTION ENGINE - A method of producing a hollow casting is provided, by which the joinability of a cast base material and a hollow-forming member to each other can be enhanced while suppressing the generation of oxides of or blow holes on a casting base material. The method of producing the hollow casting comprises enveloping a hollow-forming member in a molten base-metal cast material. Specifically, the method comprises the steps of: producing a hollow-forming member with a material having a melting point higher than that of a base-metal cast material such that air-gap layers are formed within the surface layers of contact surfaces with which the molten metal comes into contact; coating the contact surfaces with a layer of the same metal as that of the base-metal cast material; and enveloping the hollow-forming member in the base-metal cast material by disposing the coated hollow-forming member within a mold and then pouring the molten base-metal cast material into the mold. | 11-29-2012 |
| 029888049 | Ring groove forming or finishing | 4 |
| 20080250640 | Method for Producing a Piston for an Internal Combustion Engine and the Thus Produced Piston - The invention relates to a method for producing an internal combustion engine piston which is provided with at least one cooling channel ( | 10-16-2008 |
| 20090255113 | Process For Hardening An Annular Groove Of A Piston Head By Means Of Laser Beams And A Piston Produced By The Process - The invention relates to a process for hardening an annular groove of a piston head ( | 10-15-2009 |
| 20110265326 | METHOD FOR MANUFACTURING SINGLE-PIECE FORGED-STEEL PISTON WITH INNER OIL COOLING CHAMBER - A method for manufacturing piston with enclosed inner oil cooling chamber including 1) forging a blank of a piston body member and a blank of a piston ring member separately; 2) thermally treating the blank of the piston body member and the blank of the piston ring member separately; 3) sand blasting the blank of the piston body member and the blank of the piston ring member to form the inner cavity, the inner oil cooling chamber, and the laser welding surface; 4) welding the piston body member and the piston ring member together through laser welding procedure; 5) manufacturing the piston ring shaped groove, combustion chamber, ring groove, pinhole, outer circle, and the oil inlet/outlet holes, separately; and 6) phosphating or graphitizing the piston surface. | 11-03-2011 |
| 20130031782 | METHOD FOR PRODUCING A PISTON FOR AN INTERNAL COMBUSTION ENGINE - A method for producing a piston for an internal combustion engine, which piston has a piston head, an annular portion and a piston skirt which has two opposite piston pin bosses, shaft recesses being made into the regions of the radially outer end faces of the piston pin bosses during the final machining of the outer surface of the piston blank, the recesses extending in the radial direction. The final machining of the outer surface of the piston blank, including the shaping of the grooves into the annular portion and the shaping of the skirt recesses into the piston skirt, is carried out using a lathe, the position of the turning tool thereof being freely programmable depending on the rotational position of the piston. | 02-07-2013 |
| 029888050 | Gudgeon pin, wrist pin, piston pin, or boss therefor | 2 |
| 20140096384 | PISTON PIN DEVICE AND METHOD OF MAKING THE SAME - A piston pin includes a cylindrical sleeve and an insert, the insert material having a lower volume weight than that of a material of the sleeve,. For instance, the insert can be made of an aluminium alloy, of titanium, of a TiAl alloy or of a composite material. The insert has a length approximately equal to, or less than, that of the sleeve and is firmly secured to the latter by force- or interference-fitting. | 04-10-2014 |
| 20150336223 | REDUCED COMPRESSION HEIGHT PISTON AND PISTON ASSEMBLY THEREWITH AND METHODS OF CONSTRUCTION THEREOF - A piston assembly and method of construction thereof for an internal combustion engine are provided. The assembly includes a piston head having an upper combustion wall with an undercrown surface and a ring belt region. The piston head has a floor with an upper surface and a bottom surface. The floor is spaced beneath the upper combustion wall in radial alignment with the ring belt region. A substantially enclosed, annular cooling gallery is bounded by the undercrown surface and the floor. A pair of pin bores depends directly from the floor of the cooling gallery. The assembly further includes a pin having ends configured for oscillating receipt in the pin bores. A pin bearing surface extends within the pin bores and between the pin bores in the lower surface of the floor. The assembly includes a connecting rod with an end fixed to the pin for conjoint oscillation therewith. | 11-26-2015 |
