Patents by Inventor Stefan Gaiselmann
Stefan Gaiselmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11815045Abstract: A cylinder liner for an internal combustion engine may include a hollow-cylindrical liner body, which may have an inner circumferential surface including a first axial portion and a second axial portion. The first axial portion may open at a first opening angle towards the second axial portion. The second axial portion may open at a second opening angle away from the first axial portion. The second opening angle may be greater than the first opening angle. A first surface roughness in the first axial portion may be greater than a second surface roughness in the second axial portion. A plateau aspect in the second axial portion, which may be defined as R3p=Rvk/(Rpk+Rk), may be 0.2 to 1.6. A texture height in the second axial portion, which may be defined as R3k=Rpk+Rk+Rvk, may be 0.4 ?m or less.Type: GrantFiled: June 13, 2022Date of Patent: November 14, 2023Inventors: Stefan Gaiselmann, Bartek Lemm, Ricardo Daltio Riceto, Thomas Stibleichinger
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Patent number: 11680538Abstract: A cylindrical sleeve for an internal combustion engine is disclosed. The cylindrical sleeve includes a hollow cylindrical sleeve body, extending along an axial direction, with an inner peripheral side that has, along the axial direction, a first axial portion and a second axial portion. The inner peripheral side in the first axial portion is either cylindrical or opens at a first opening angle towards the second axial portion. The second axial portion opens at a second opening angle away from the first axial portion that is greater than the first opening angle. A first surface roughness of the inner peripheral side in the first axial portion is greater than a second surface roughness in the second axial portion.Type: GrantFiled: December 9, 2020Date of Patent: June 20, 2023Inventors: Stefan Gaiselmann, Bartek Lemm, Marco Maurizi
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Publication number: 20230011925Abstract: A cylindrical sleeve for an internal combustion engine is disclosed. The cylindrical sleeve includes a hollow cylindrical sleeve body, extending along an axial direction, with an inner peripheral side that has, along the axial direction, a first axial portion and a second axial portion. The inner peripheral side in the first axial portion is either cylindrical or opens at a first opening angle towards the second axial portion. The second axial portion opens at a second opening angle away from the first axial portion that is greater than the first opening angle. A first surface roughness of the inner peripheral side in the first axial portion is greater than a second surface roughness in the second axial portion.Type: ApplicationFiled: December 9, 2020Publication date: January 12, 2023Inventors: Stefan Gaiselmann, Bartek Lemm, Marco Maurizi
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Publication number: 20220397077Abstract: A cylinder liner for an internal combustion engine may include a hollow-cylindrical liner body, which may have an inner circumferential surface including a first axial portion and a second axial portion. The first axial portion may open at a first opening angle towards the second axial portion. The second axial portion may open at a second opening angle away from the first axial portion. The second opening angle may be greater than the first opening angle. A first surface roughness in the first axial portion may be greater than a second surface roughness in the second axial portion. A plateau aspect in the second axial portion, which may be defined as R3p=Rvk/(Rpk+Rk), may be 0.2 to 1.6. A texture height in the second axial portion, which may be defined as R3k=Rpk+Rk+Rvk, may be 0.4 ?m or less.Type: ApplicationFiled: June 13, 2022Publication date: December 15, 2022Inventors: Stefan Gaiselmann, Bartek Lemm, Ricardo Daltio Riceto, Thomas Stibleichinger
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Patent number: 11022063Abstract: A cylinder bore for a cylinder housing of an internal combustion engine may have a cylinder running surface, an upper reversal point and a lower reversal point at which a piston, which may be moved up and down in the cylinder bore and may have piston rings and a piston skirt, may reach a speed which approaches zero during engine operation. The cylinder bore may also have a region between the upper reversal point and the lower reversal point at which the piston may reach a maximum speed during engine operation. The cylinder bore may further have at least two circumferential depressions formed within the region, the at least two circumferential depressions each having a diameter that may be greater than a diameter of the cylinder bore above the region and below the region.Type: GrantFiled: May 20, 2016Date of Patent: June 1, 2021Inventors: Ulrich Bischofberger, Stefan Gaiselmann
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Patent number: 10961947Abstract: A cylinder liner for an internal combustion engine may have a running surface, in which by honing directed honing grooves may be introduced. The running surface may have a first region and a second region, wherein the first region may have a roughness that may be distinct from a roughness of the second region. A transition between the first region and the second region may proceed obliquely to a cylinder longitudinal axis at least in some portions. At least some of the honing grooves at the transition between the first region and the second region are uninterrupted.Type: GrantFiled: March 13, 2018Date of Patent: March 30, 2021Inventor: Stefan Gaiselmann
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Publication number: 20200378332Abstract: A cylinder liner for an internal combustion engine may have a running surface, in which by honing directed honing grooves may be introduced. The running surface may have a first region and a second region, wherein the first region may have a roughness that may be distinct from a roughness of the second region. A transition between the first region and the second region may proceed obliquely to a cylinder longitudinal axis at least in some portions. At least some of the honing grooves at the transition between the first region and the second region are uninterrupted.Type: ApplicationFiled: March 13, 2018Publication date: December 3, 2020Inventor: Stefan Gaiselmann
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Patent number: 10352268Abstract: A cylinder liner for an internal combustion engine may include an aluminum alloy material including a magnesium content of at least 0.3% by weight, a liner body having a circumferential face, and an adapter layer of silicon oxide disposed on the circumferential face. The adapter layer may include at least one of a potassium oxide content and a sodium oxide content of greater than or equal to 0% by weight.Type: GrantFiled: May 5, 2017Date of Patent: July 16, 2019Assignee: Mahle International GmbHInventors: Ulrich Bischofberger, Stefan Gaiselmann
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Publication number: 20190085787Abstract: A cylinder sleeve for an internal combustion engine may include a bore-through cylindrical body having an inner sliding surface. The inner surface may have a surface finish with a rugosity defined by a valley-and-peak structure. The rugosity of the inner surface may have a ratio between a peak density and a mean radius of curvature of peaks that is higher than 150 and lower than 400. The rugosity may also have a ratio between the mean radius of curvature of peaks and an average height of peaks that is lower than 1500.Type: ApplicationFiled: May 30, 2016Publication date: March 21, 2019Inventors: Rafael BETTINI RABELLO, Stefan GAISELMANN
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Publication number: 20180149109Abstract: A cylinder bore for a cylinder housing of an internal combustion engine may have a cylinder running surface, an upper reversal point and a lower reversal point at which a piston, which may be moved up and down in the cylinder bore and may have piston rings and a piston skirt, may reach a speed which approaches zero during engine operation. The cylinder bore may also have a region between the upper reversal point and the lower reversal point at which the piston may reach a maximum speed during engine operation. The cylinder bore may further have at least two circumferential depressions formed within the region, the at least two circumferential depressions each having a diameter that may be greater than a diameter of the cylinder bore above the region and below the region.Type: ApplicationFiled: May 20, 2016Publication date: May 31, 2018Inventors: Ulrich Bischofberger, Stefan Gaiselmann
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Patent number: 9816456Abstract: A cylinder liner for an internal combustion engine may include an outer circumferential surface defined by the cylinder liner composed of a gray cast iron for integrally casting onto a cast material of an engine block. A bonding component may be included for strengthening a bond of the outer circumferential surface to the cast material of the engine block. The bonding component may include at least one of a wire mesh and a wire grid that does not melt during a casting operation of the engine block. The bonding component may be arranged at least in a predefined region on the outer circumferential surface. The bonding component may be welded at least partially to the outer circumferential surface.Type: GrantFiled: July 5, 2013Date of Patent: November 14, 2017Assignee: Mahle International GmbHInventors: Gerhard Bucher, Stefan Gaiselmann, Marco Maurizi
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Publication number: 20170234261Abstract: A cylinder liner for an internal combustion engine may include an aluminum alloy material including a magnesium content of at least 0.3% by weight, a liner body having a circumferential face, and an adapter layer of silicon oxide disposed on the circumferential face. The adapter layer may include at least one of a potassium oxide content and a sodium oxide content of greater than or equal to 0% by weight.Type: ApplicationFiled: May 5, 2017Publication date: August 17, 2017Inventors: Ulrich Bischofberger, Stefan Gaiselmann
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Patent number: 9670870Abstract: A method for producing a cast component may include providing an insert part including an insert body having a circumferential face; coating the circumferential face with an adapter layer made of silicon oxide; arranging the insert part in a casting mold; and positively locking a casting encapsulation of the insert part and the adapter layer with an aluminum alloy to produce the cast component, wherein the aluminum alloy has a magnesium proportion of at least 0.3% by weight.Type: GrantFiled: September 25, 2014Date of Patent: June 6, 2017Assignee: Mahle International GmbHInventors: Ulrich Bischofberger, Stefan Gaiselmann
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Patent number: 9488126Abstract: A method for producing a cylinder liner surface for a cylinder crankcase of an internal combustion engine has the following method steps: (a) preliminary honing of the inner surface of a cylinder liner consisting of a cast iron material to form depressions in the surface; (b) application of a coating material containing zinc to the honed surface; (c) final honing of the coated surface in such a way that the coating material containing zinc remains only in the depressions formed by the preliminary honing.Type: GrantFiled: July 4, 2012Date of Patent: November 8, 2016Assignee: MAHLE International GmbHInventors: Ulrich Bischofberger, Stefan Gaiselmann
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Publication number: 20160298571Abstract: A method for producing a cast component may include providing an insert part including an insert body having a circumferential face; coating the circumferential face with an adapter layer made of silicone oxide; arranging the insert part in a casting mold; and positively locking a casting encapsulation of the insert part and the adapter layer with an aluminum alloy to produce the cast component, wherein the aluminum alloy has a magnesium proportion of at least 0.3% by weight.Type: ApplicationFiled: September 25, 2014Publication date: October 13, 2016Inventors: Ulrich Bischofberger, Stefan Gaiselmann
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Publication number: 20150152806Abstract: A cylinder liner for an internal combustion engine may include an outer circumferential surface defined by the cylinder liner composed of a gray cast iron for integrally casting onto a cast material of an engine block. A bonding component may be included for strengthening a bond of the outer circumferential surface to the cast material of the engine block. The bonding component may include at least one of a wire mesh and a wire grid that does not melt during a casting operation of the engine block. The bonding component may be arranged at least in a predefined region on the outer circumferential surface. The bonding component may be welded at least partially to the outer circumferential surface.Type: ApplicationFiled: July 5, 2013Publication date: June 4, 2015Inventors: Gerhard Bucher, Stefan Gaiselmann, Marco Maurizi
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Publication number: 20150096524Abstract: The invention relates to a piston for an internal combustion engine made of an iron-based material, comprising a piston head and a piston skirt, the piston head comprising a piston base, a peripheral top land and a peripheral annular part comprising annular grooves. According to the invention, at least one annular groove comprises at least one insert made of an zinc-based material.Type: ApplicationFiled: May 3, 2013Publication date: April 9, 2015Applicant: MAHLE International GmbHInventors: Ulrich Bischofberger, Stefan Gaiselmann
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Publication number: 20140144404Abstract: A method for producing a cylinder liner surface for a cylinder crankcase of an internal combustion engine has the following method steps: (a) preliminary honing of the inner surface of a cylinder liner consisting of a cast iron material to form depressions in the surface; (b) application of a coating material containing zinc to the honed surface; (c) final honing of the coated surface in such a way that the coating material containing zinc remains only in the depressions formed by the preliminary honing.Type: ApplicationFiled: July 4, 2012Publication date: May 29, 2014Applicant: MAHLE INTERNATIONAL GMBHInventors: Ulrich Bischofberger, Stefan Gaiselmann
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Patent number: 8720319Abstract: The present invention relates to a cylinder sleeve (10) having an outer mantle surface (11) that has a surface structure (12, 112, 212). According to the invention, it is provided that the mantle surface (11) is provided with elevations (13, 113, 213; 14, 118, 219), that each elevation (13, 113, 213; 14, 118, 219) has at least one rounded area (16, 116, 216) in the region of its base (B), that some of the elevations (13, 113, 213) have at least one undercut (15, 115, 215), and that at least one elevation (14, 118, 219) without undercut is disposed between two elevations (13, 113, 213) with undercut (15, 115, 215).Type: GrantFiled: December 3, 2010Date of Patent: May 13, 2014Assignee: MAHLE International GmbHInventors: Ulrich Bischofberger, Stefan Gaiselmann
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Publication number: 20110154983Abstract: The present invention relates to a cylinder sleeve (10) having an outer mantle surface (11) that has a surface structure (12, 112, 212). According to the invention, it is provided that the mantle surface (11) is provided with elevations (13, 113, 213; 14, 118, 219), that each elevation (13, 113, 213; 14, 118, 219) has at least one rounded area (16, 116, 216) in the region of its base (B), that some of the elevations (13, 113, 213) have at least one undercut (15, 115, 215), and that at least one elevation (14, 118, 219) without undercut is disposed between two elevations (13, 113, 213) with undercut (15, 115, 215).Type: ApplicationFiled: December 3, 2010Publication date: June 30, 2011Applicant: MAHLE International GmbHInventors: Ulrich Bischofberger, Stefan Gaiselmann