| KS KOLBENSCHMIDT GMBH Patent applications |
| Patent application number | Title | Published |
|---|
| 20130062218 | METHOD FOR PRODUCING AN ARBITRARY GEOMETRY ON PISTONS OF INTERNAL COMBUSTION ENGINES - A method for processing a constructed, liquid-cooled piston of an internal combustion engine, the piston including an upper piston part and a lower piston part, which are supported by a joining plane and are connected to each other in a bonded manner. An electrochemical method, such as electrochemical machining, is used to produce a passage opening or a hole in the piston. By means of the method, material is selectively removed after the completion of the upper part piston, the lower piston part, or the piston after the two piston parts have been joined. The electrochemical machining allows an arbitrarily geometrically designed topography having at least one passage opening, a hollow, or an oil pocket in cooling areas or non-cooling areas to be created on the piston. | 03-14-2013 |
| 20130032104 | PISTON UPPER PART OF AN ASSEMBLED OR WELDED PISTON WITH EXTENDED COOLING SPACES - A liquid cooled piston of an internal combustion engine includes a piston lower part and piston upper part which has a combustion chamber recess. These piston components are supported via joining lands which are spaced apart radially and together form a dividing plane, and are joined together preferably with a material-to-material fit. In order to receive piston rings, the piston upper part has a ring area and includes an annular cooling channel which extends into the piston lower part and is connected to an inner cooling space connecting channels. The cooling channel is adjoined by recesses which are oriented in the direction of a piston head, are configured as a blind hole and widen conically starting from the cooling channel as far as a recess bottom. The recess bottom can be of a pronounced undulating enlarged surface or a finely undulating configuration. | 02-07-2013 |
| 20120187110 | METHOD FOR PRODUCING A PISTON OF AN INTERNAL COMBUSTION ENGINE BY MEANS OF AN INDUCTIVE ENERGY SUPPLY AND LASER BEAM - A method for producing a piston of an internal combustion engine, wherein the piston has a combustion bowl including a combustion bowl rim. The combustion bowl rim is hardened by being remelted in a first step by means of an inductive energy supply and, in a further step, by a laser beam. The beam can be deflected during a rotary, progressive motion relative to the piston. | 07-26-2012 |
| 20110265744 | INTERNAL COMBUSTION ENGINE PISTON WITH COOLING CHANNEL SAID PISTON COMPRISING A SEALING ELEMENT SEALING THE COOLING CHANNEL - A cooling channel piston has a radially circumferential cooling channel located behind a ring field. The cooling channel piston is forged from a steel material and the cooling channel is worked in by machining between an upper part below the ring field and a lower part above the piston bosses and the piston skirts. The cooling channel extends behind the ring field in the direction of an upper face of the upper part, it being provided that the cooling channel piston has above its piston bosses and piston skirts an outwardly oriented support region. A closing element, which closes the cooling channel after the production thereof, is fastened between the lower edge of the ring field and the support region. | 11-03-2011 |
| 20110203545 | Method For Manufacturing A Piston Of An Internal Combustion Engine, Comprising An Improved Aluminum Silicon Alloy - The invention relates to a process for producing a piston of an internal combustion engine, wherein a piston blank is cast from an alloy of aluminium and silicon with the addition of copper fractions and is then finished, wherein the invention provides that the maximum fraction of copper in the alloy, of aluminium and silicon is 5.5%, and that fractions of titanium (Ti), zirconium (Zr), chromium (Cr) or vanadium (V) are admixed with the alloy of aluminium and silicon. | 08-25-2011 |
| 20110185992 | FRICTION WELDED STEEL PISTON HAVING OPTIMIZED COOLING CHANNEL - A piston of an internal combustion engine includes a top part produced from steel and a bottom part, which are integrally bonded in the region of a contact geometry via joining webs by a friction weld to form a structural unit. At least one cooling duct permeated by a coolant is integrated in the piston, wherein a lubricating oil of the internal combustion engine passes as the coolant into an inlet opening via a free jet of an injection nozzle, flows through the cooling duct and leaves the cooling duct via an outlet opening. For the introduction of the coolant into the cooling duct, the inlet opening is assigned a flow pipe which is inserted in the bottom part and protrudes from a cooling duct base, the opening of the flow pipe being arranged above the weld beads of the friction weld. | 08-04-2011 |
| 20110146845 | FLUX AND METHOD FOR THE REDUCTION OF OXIDE LAYERS ON METALLIC SURFACES - A flux for application on and for reduction of oxide layers on a metal surface. The flux includes potassium fluoride, sodium fluoride, remaining moieties of water and gelatin. The can also include a reactant comprising moieties of at least one of the compositions of zirconium fluoride, lithium fluoride, sodium fluoride, potassium cryolite and potassium aluminum fluoride (KaAlF | 06-23-2011 |
| 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 |
| 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 |
| 20100275873 | SIMPLE FRICTIONAL WELD - A cooling channel piston for an internal combustion engine which includes a piston bottom and a piston shaft that are joined thereto of a friction welding process. The piston bottom and the piston shaft jointly form a cooling channel. An annular wall which radially delimits the cooling channel towards the outside is formed by the piston bottom and/or the piston shaft. The annular wall can be sealed by a welding process once the piston bottom and the piston shaft have been joined together. | 11-04-2010 |
| 20100154940 | MELT-TREATED RIM OF A PISTON COMBUSTION BOWL - A method for producing pistons that can be used in internal combustion engines made from lightweight metal, with a combustion bowl assigned to one piston head, wherein a bowl rim is subjected to a melt treatment. In a first method step, the bowl rim is inductively heated. In a second method step, the material of the bowl rim, also to be referred to as the delimiting zone, is improved by means of a laser beam. | 06-24-2010 |
| 20100147251 | Piston Of An Internal Combustion Engine With an Increased Inclination of The Box Walls of the Piston - A piston of an internal combustion engine has a piston crown with annular grooves and a shaft part disposed on the piston crown. The shaft part has bearing shaft wall sections which are connected to one another via inclined connecting walls which are retracted with respect to the outer diameter of the piston. Piston-pin bosses for accommodating a piston pin are disposed in connecting walls. The connecting walls are retracted at such an angle that, in progressing from the lower edge over an intermediate region which lies further back than the lower edge, into an end region which lies further back than the intermediate region the connecting walls to over flush into a hub supporting region below the piston crown. | 06-17-2010 |
| 20100101527 | LOAD-OPTIMIZED INTERIOR OF A PISTON - A piston of an internal combustion engine has a piston crown provided with a ring zone and adjoining a piston skirt encompassing a piston interior, the skirt having two load-bearing skirt wall segments and two pin bosses. Each pin boss encompassing a boss hole is connected to a boss base body by a boss support, the base body having ribs to increase stiffness, which are aligned to the extent possible in the direction of the boss holes continuously connecting the pin bosses. The curved or arched ribs thereby cover a pivoting range of a connecting rod. | 04-29-2010 |
| 20100050975 | METHOD FOR PRODUCING A CAST PART, IN PARTICULAR A PISTON BLANK - A method for producing a cast part using a casting machine which comprises a least one casting mould that can be filled with a casting melt. According to the method, the casting is filled with a casting melt, the melt is left to completely solidify and the cast part is then removed from the casting. The casting is filled with melt by the casting machine without the use of pressure at a fill speed of less than 10 m per second in the gating and is then squeezed in the casting mould at a casting pressure greater than 100. | 03-04-2010 |
| 20100037765 | METHOD FOR THE PRODUCTION OF A PISTON OF AN INTERNAL COMBUSTION ENGINE IN ORDER TO FORM A REINFORCEMENT OF A COMBUSTION CHAMBER CAVITY OF THE PISTON - A method for producing a piston of an internal combustion engine in which a first blank and at least one additional black are provided with a somewhat cylindrical shape. The blanks are joined together, and the obtained piston blank is subjected to a shaping process in which a combustion chamber cavity of the piston is formed in the area of a joining point between the first and the second blank. The material of the second blank forms a reinforcement for at least the combustion chamber cavity. | 02-18-2010 |
| 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 |
| 20090241769 | COOLING CHANNEL PISTON FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR THE PRODUCTION THEREOF - A method for producing a one-piece, lightweight piston consisting of steel and having a small compression depth (S) forms piston with at least one cavity in a shaft aperture region. A piston blank is produced in a first step using a forging or casting method. To form a cooling channel between an annular region and a combustion chamber recess an annular section is formed in one piece onto the wall of a cooling channel in the vicinity of the piston base. The joint produced between the annular section and an outer wall of the cooling channel is sealed by welding. | 10-01-2009 |
| 20090173309 | Piston For an Internal Combustion Engine Having Two Ring Grooves Wherein One Ring Groove Has A Ring Carrier - A piston for an internal combustion engine has a piston upper part which has a ring field having a plurality of ring grooves, and a piston lower part wherein there is provision for the ring field to have precisely two ring grooves with at least the upper ring grooves having a ring carrier. | 07-09-2009 |
| 20080314241 | Piston Comprising a Circumferential Radial Recess Located Below an Annular Groove - A piston having a top part and an adjacent shaft part. The top part of the piston is provided with a field of rings encompassing at least one annular groove. A circumferential radial recess is located in the region between the upper edge of the shaft part and the annular groove. The upper diameter of the recess is smaller than the lower diameter of the recess. | 12-25-2008 |
| 20080307957 | Piston-Pin Bore Dimensions for a Piston of an Internal Combustion Engine - A coating for a tribologically heavily loaded component, wherein the coating is in the form of a ceramic coating made of an organic-inorganic prepolymer which is pyrolyzed after being applied to the component. | 12-18-2008 |
| 20080264247 | Lightweight Piston - A piston has a piston head that is provided with a field of rings and a piston shaft which is disposed thereupon. The piston shaft is equipped with supporting shaft wall sections and rear connecting walls which interconnect the shaft wall sections, have an arched shape, and are fitted with a bolt bore. An undercut free space is provided below the annular field in the area of the bolt bore in the region of the piston head. An arched zone is disposed in the interior of the piston at the transition from the bolt bore in the direction of the shaft wall session. | 10-30-2008 |
| 20080245231 | Piston, Especially Cooling Channel Piston, of an Internal Combustion Engine, Comprising Three Friction Welded Zones - A piston, such as a cooling channel piston of an internal combustion engine, has a first part, a second part and a third part. The parts can be produced separately from each other and subsequently assembled by way of a joining method. The third part has at least one rotationally symmetrical joining area disposed in direction of the first part, and, another rotationally symmetrical joining area disposed at least in the direction of the second part. The joining areas mate with joining areas of the first part and the second part. | 10-09-2008 |
| 20080245229 | Piston for an Internal Combustion Engine - The invention relates in particular to a piston ( | 10-09-2008 |
| 20080229923 | Piston, Especially Cooling Channel Piston, Comprising Three Friction-Welded Zones - A piston, especially a cooling channel piston of an internal combustion engine, has an upper part and a lower part which can be produced separately from each other and subsequently be assembled. The upper part has at least three radially peripheral joining webs and the lower part likewise at least three radially peripheral joining webs. During assembly, the webs are put together and connect the upper part firmly to the lower part. | 09-25-2008 |
| 20080202330 | Rotor Recess With Scupper Slots and Free Casting - A piston for an internal combustion engine includes a piston head provided with an annular field, and a piston shaft arranged beneath the annular field. The piston shaft has shaft surfaces and a recess surface which is arranged around a bolt borehole and set back in relation to an outer diameter of the piston. At least one cavity is provided in the region of the lowest annular groove for oil flow in the direction of the recess surface during the movement of the piston and the at least one cavity is arranged outside an especially stressed region above the bolt borehole. | 08-28-2008 |
