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公开(公告)号：US20190003418A1
公开(公告)日：2019-01-03
申请号：US16110874
申请日：2018-08-23
申请人： Federal-Mogul LLC
发明人： Jeff Riffe , Michael Weinenger
摘要： A galleryless piston for an internal combustion engine is provided. The piston has a monolithic piston body including an upper wall forming an upper combustion surface with first and second portions. The first portion extends annularly along an outer periphery of the upper wall and the second portion includes a combustion bowl. The first portion can also include valve pockets formed therein to reduce weight. The upper wall has an undercrown surface directly opposite the second portion of the upper combustion surface. To enhance cooling, a center portion of the undercrown surface is concave, such that oil is channeled during reciprocation of the piston from one side to the opposite side of the piston. The concave center portion is axially offset from the surrounding area of the undercrown surface.
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公开(公告)号：US20170254290A1
公开(公告)日：2017-09-07
申请号：US15441659
申请日：2017-02-24
申请人： FEDERAL-MOGUL LLC
CPC分类号： F02F3/22 , F02F3/20 , F02F3/26 , F02F2200/04 , F02F2200/06
摘要： A piston galleryless piston capable achieving improved thermal efficiency, fuel consumption, and engine performance is provided. The piston includes an undercrown surface exposed from an underside of the piston, a ring belt, pin bosses, and a pair of skirt panels coupled to the pin bosses by struts. The piston includes an inner undercrown region extending along the undercrown surface and surrounded by the skirt panels, struts, and pin bosses. The piston also includes a pair of outer pockets extending along the undercrown surface and each being surrounded by a portion of the ring belt, one of the pin bosses, and the struts coupling the one pin boss to the skirt panels. Each pin boss includes an opening extending from the inner undercrown region to one of the outer pockets for conveying cooling oil. The opening is located between a pin bore of the associated pin boss and the undercrown surface.
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公开(公告)号：US10428761B2
公开(公告)日：2019-10-01
申请号：US15437631
申请日：2017-02-21
申请人： FEDERAL-MOGUL LLC
发明人： Thomas Scherbaum , Sven Ungermann , Harald Mergler , Josef Harrer , Michael Seiffert , Georg Hopp , Arnd Baberg , Hanno Necker , Michael Weinenger , Jeffrey L. Riffe
摘要： A galleryless piston having a reduced temperature during operation in an engine is provided. The piston includes an upper wall with an exposed undercrown surface. A ring belt and pin bosses depend from the upper wall, and a pair of skirt panels depend from the ring belt and are coupled to the pin bosses by struts. The piston includes an inner undercrown region and outer pockets extending along the undercrown surface. The inner undercrown region is surrounded by the skirt panels, the struts, and the pin bosses. Each outer pocket is surrounded by one of the pin bosses, a portion of the ring belt, and the struts adjacent the one pin boss. A plurality of holes extend through the pin bosses and/or the struts from the inner undercrown region to one of the outer pockets to convey cooling oil from the inner undercrown region to the outer pockets.
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公开(公告)号：US20170260927A1
公开(公告)日：2017-09-14
申请号：US15448421
申请日：2017-03-02
申请人： FEDERAL-MOGUL LLC
CPC分类号： F02F3/22 , F01P3/06 , F01P3/08 , F02B23/0672 , F02B23/0696 , F02F3/0076 , F02F3/26 , F02F2003/0007 , F02F2200/04 , F02F2200/06
摘要： A galleryless piston having a reduced weight and a reduced operating temperature is provided. The piston includes an undercrown surface exposed from an underside of the piston, a ring belt, pin bosses each presenting a pin bore, and skirt panels depending from the ring belt and coupled to the pin bosses by strut. The piston further includes an inner undercrown region extending along the undercrown surface and surrounded by the skirt panels, the struts, and the pin bosses. The piston also includes outer pockets each extending along the undercrown surface and each surrounded by a portion of the ring belt, one of the pin bosses, and the struts coupling the one pin boss to the skirt panels. Cutouts are located in the pin bosses above the pin bores to increase the area of the undercrown surface and thus allow cooling oil to remove more heat from the undercrown surface.
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公开(公告)号：US20170241374A1
公开(公告)日：2017-08-24
申请号：US15437631
申请日：2017-02-21
申请人： FEDERAL-MOGUL LLC
发明人： Thomas Scherbaum , Sven Ungermann , Harald Mergler , Josef Harrer , Michael Seiffert , Georg Hopp , Arnd Baberg , Hanno Necker , Michael Weinenger , Jeffrey L. Riffe
CPC分类号： F02F3/22 , F02F3/0076 , F02F3/0084 , F02F3/20 , F02F2200/06
摘要： A galleryless piston having a reduced temperature during operation in an engine is provided. The piston includes an upper wall with an exposed undercrown surface. A ring belt and pin bosses depend from the upper wall, and a pair of skirt panels depend from the ring belt and are coupled to the pin bosses by struts. The piston includes an inner undercrown region and outer pockets extending along the undercrown surface. The inner undercrown region is surrounded by the skirt panels, the struts, and the pin bosses. Each outer pocket is surrounded by one of the pin bosses, a portion of the ring belt, and the struts adjacent the one pin boss. A plurality of holes extend through the pin bosses and/or the struts from the inner undercrown region to one of the outer pockets to convey cooling oil from the inner undercrown region to the outer pockets.
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公开(公告)号：US10968862B2
公开(公告)日：2021-04-06
申请号：US16110874
申请日：2018-08-23
申请人： Federal-Mogul LLC
发明人： Jeff Riffe , Michael Weinenger
摘要： A galleryless piston for an internal combustion engine is provided. The piston has a monolithic piston body including an upper wall forming an upper combustion surface with first and second portions. The first portion extends annularly along an outer periphery of the upper wall and the second portion includes a combustion bowl. The first portion can also include valve pockets formed therein to reduce weight. The upper wall has an undercrown surface directly opposite the second portion of the upper combustion surface. To enhance cooling, a center portion of the undercrown surface is concave, such that oil is channeled during reciprocation of the piston from one side to the opposite side of the piston. The concave center portion is axially offset from the surrounding area of the undercrown surface.
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公开(公告)号：US10344706B2
公开(公告)日：2019-07-09
申请号：US15448421
申请日：2017-03-02
申请人： FEDERAL-MOGUL LLC
摘要： A galleryless piston having a reduced weight and a reduced operating temperature is provided. The piston includes an undercrown surface exposed from an underside of the piston, a ring belt, pin bosses each presenting a pin bore, and skirt panels depending from the ring belt and coupled to the pin bosses by strut. The piston further includes an inner undercrown region extending along the undercrown surface and surrounded by the skirt panels, the struts, and the pin bosses. The piston also includes outer pockets each extending along the undercrown surface and each surrounded by a portion of the ring belt, one of the pin bosses, and the struts coupling the one pin boss to the skirt panels. Cutouts are located in the pin bosses above the pin bores to increase the area of the undercrown surface and thus allow cooling oil to remove more heat from the undercrown surface.
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公开(公告)号：US10202937B2
公开(公告)日：2019-02-12
申请号：US15657018
申请日：2017-07-21
申请人： Federal-Mogul LLC
发明人： Jeff Riffe , Michael Weinenger
摘要： A galleryless piston for an internal combustion engine and method of construction thereof are provided. The piston has a monolithic piston body extending along a central longitudinal axis. The piston body has an upper wall forming an upper combustion surface with first and second portions, with the first portion extending annularly along an outer periphery of the upper wall and the second portion forming a combustion bowl. The upper wall has an undercrown surface on an underside of the combustion bowl directly opposite the second portion of the upper combustion surface. The undercrown surface has an openly exposed surface area, as viewed looking along the central longitudinal axis, thereby providing an expansive area against which oil being splashed or sprayed can freely contact to cool the piston.
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公开(公告)号：US20180236555A1
公开(公告)日：2018-08-23
申请号：US15880359
申请日：2018-01-25
申请人： Federal-Mogul LLC
发明人： Michael Weinenger
CPC分类号： B22F5/008 , B22F3/1055 , B22F3/11 , B22F7/062 , B22F7/08 , B22F2301/10 , B22F2301/30 , B23K26/082 , B23K26/144 , B23K26/34 , B23K26/346 , B23K2101/003 , B23K2103/04 , B23K2103/12 , B23P15/10 , B33Y10/00 , B33Y80/00 , F02F3/003 , F02F3/10 , F02F3/22 , F02F2003/0061 , F02F2200/00 , F16J1/14
摘要： A steel piston with a bushing applied to pin bore surfaces by laser cladding or laser additive manufacturing is provided. The bushing is formed of metal, such as bronze, and metallurgically bonded to the steel of the piston. Thus, the bushing cannot fail by rotating relative to pin bore surfaces. The bushing has a porosity ranging from 0.05% to 5%, based on the total volume of the bushing, and a thickness ranging from 0.07 mm to 6 mm. Since the metal is applied directly to the steel by laser cladding or laser additive manufacturing, the overall size of the piston is reduced, compared to typical pistons with a separate steel backed bushing, and the possibility of bushing rotation is avoided. The bushing also provides scuffing resistance and increased unit load capacity of the pin bore.
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公开(公告)号：US20170321628A1
公开(公告)日：2017-11-09
申请号：US15657018
申请日：2017-07-21
申请人： Federal-Mogul LLC
发明人： Jeff Riffe , Michael Weinenger
CPC分类号： F02F3/16 , B23P15/10 , F02F3/00 , F02F3/0069 , F02F3/0092 , F02F2003/0007 , Y10T29/49265
摘要： A galleryless piston for an internal combustion engine and method of construction thereof are provided. The piston has a monolithic piston body extending along a central longitudinal axis. The piston body has an upper wall forming an upper combustion surface with first and second portions, with the first portion extending annularly along an outer periphery of the upper wall and the second portion forming a combustion bowl. The upper wall has an undercrown surface on an underside of the combustion bowl directly opposite the second portion of the upper combustion surface. The undercrown surface has an openly exposed surface area, as viewed looking along the central longitudinal axis, thereby providing an expansive area against which oil being splashed or sprayed can freely contact to cool the piston.
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