Patents by Inventor Xiluo Zhu
Xiluo Zhu 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: 7406941Abstract: A piston for diesel engine applications has a piston body cast entirely of one piece of steel and includes a piston head with a combustion bowl, a ring belt and an oil cooling gallery. A pair of pin bosses and a piston skirt are cast as one piece with the piston head out of the same steel material.Type: GrantFiled: July 20, 2005Date of Patent: August 5, 2008Assignee: Federal - Mogul World Wide, Inc.Inventors: Xiluo Zhu, Eduardo Hiroki Matsuo
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Patent number: 7143685Abstract: A monobloc piston assembly has at least two parts fixedly joined together forming a piston body having an oil cooling gallery. The oil cooling gallery is defined by an upper wall, a lower wall, and a pair of radially spaced inner and outer annular walls. A skirt is formed as one piece and of the same material with at least one of the two parts and depends generally along a longitudinal axis from the lower wall. A pair of pin bosses are spaced laterally from the longitudinal axis and depend generally from the lower wall. At least one elongated opening extends generally between the pin bosses with the opening preferably spanning a substantial portion of the distance between the pin bosses. Oil flows into and out of an oil cooling gallery through the opening.Type: GrantFiled: September 28, 2005Date of Patent: December 5, 2006Assignee: Federal Mogul World Wide, Inc.Inventors: Xiluo Zhu, Randall R. Gaiser
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Publication number: 20060037471Abstract: A piston for diesel engine applications has a piston body cast entirely of one piece of steel and includes a piston head with a combustion bowl, a ring belt and an oil cooling gallery. A pair of pin bosses and a piston skirt are cast as one piece with the piston head out of the same steel material.Type: ApplicationFiled: July 20, 2005Publication date: February 23, 2006Inventors: Xiluo Zhu, Eduardo Matsuo
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Patent number: 6990890Abstract: A monobloc piston assembly has at least two parts fixedly joined together forming a piston body having an oil cooling gallery. The oil cooling gallery is defined by an upper wall, a lower wall, and a pair of radially spaced inner and outer annular walls. A skirt is formed as one piece and of the same material with at least one of the two parts and depends generally along a longitudinal axis from the lower wall. A pair of pin bosses are spaced laterally from the longitudinal axis and depend generally from the lower wall. At least one elongated opening extends generally between the pin bosses with the opening preferably spanning a substantial portion of the distance between the pin bosses. Oil flows into and out of an oil cooling gallery through the opening.Type: GrantFiled: November 4, 2003Date of Patent: January 31, 2006Assignee: Federal-Mogul World Wide, Inc.Inventors: Xiluo Zhu, Randall R. Gaiser
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Publication number: 20060016330Abstract: A monobloc piston assembly has at least two parts fixedly joined together forming a piston body having an oil cooling gallery. The oil cooling gallery is defined by an upper wall, a lower wall, and a pair of radially spaced inner and outer annular walls. A skirt is formed as one piece and of the same material with at least one of the two parts and depends generally along a longitudinal axis from the lower wall. A pair of pin bosses are spaced laterally from the longitudinal axis and depend generally from the lower wall. At least one elongated opening extends generally between the pin bosses with the opening preferably spanning a substantial portion of the distance between the pin bosses. Oil flows into and out of an oil cooling gallery through the opening.Type: ApplicationFiled: September 28, 2005Publication date: January 26, 2006Inventors: Xiluo Zhu, Randall Galoer
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Patent number: 6862976Abstract: A monobloc piston has at least two steel parts welded together to define an inner cooling gallery. An outer ring belt is spaced from an inner annular support wall and is joined by a combustion bowl and a lower wall. A pair of pin bosses have axially aligned pin bores. A skirt is formed as one immovable piece with the pin bores. The piston has the following dimensional relationships: ISMD=42-55% of BD, where ISMD is a mean diameter on the inner support wall and BD is an outer diameter of the ring belt wall, ISW=3-8% of BD, where ISW is a sectional width of the inner support wall, CH>53% of BD where CH is a compression height measured between the pin bore axis and the upper surface, TLH>4% of BD, where TLH is a top land height measured between the top of the upper ring groove and the upper surface, SL=30-80% of BD, where SL is a length of the skirt measured between the upper and lower ends of the skirt, SW=2.5-6.Type: GrantFiled: September 24, 2002Date of Patent: March 8, 2005Assignee: Federal-Mogul World Wide, Inc.Inventors: Randall R. Gaiser, Xiluo Zhu, Roberto Bueno Nigro
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Publication number: 20040144247Abstract: A monobloc piston assembly has at least two parts fixedly joined together forming a piston body having an oil cooling gallery. The oil cooling gallery is defined by an upper wall, a lower wall, and a pair of radially spaced inner and outer annular walls. A skirt is formed as one piece and of the same material with at least one of the two parts and depends generally along a longitudinal axis from the lower wall. A pair of pin bosses are spaced laterally from the longitudinal axis and depend generally from the lower wall. At least one elongated opening extends generally between the pin bosses with the opening preferably spanning a substantial portion of the distance between the pin bosses. Oil flows into and out of an oil cooling gallery through the opening.Type: ApplicationFiled: November 4, 2003Publication date: July 29, 2004Inventors: Xiluo Zhu, Randall R. Gaiser
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Patent number: 6588320Abstract: A piston (10) particularly suited for heavy duty diesel engine applications includes upper and lower crown sections (28, 30) joined by a friction weld (32) to define an annular ring belt (14) formed with ring groves (22) and having a lower end (20) and an internal piston cooling chamber (34). A pair of pin bosses (40) depend from the ring belt (14) and are formed as one piece with the lower crown section (30). A skirt (46) is also formed as one piece with the pin bosses (40) and has an upper end (48) that is spaced from the lower end (20) of the ring belt (14) to define a space (52) therebetween which effectively uncouples the skirt (46) from the ring belt (14).Type: GrantFiled: December 27, 2000Date of Patent: July 8, 2003Assignee: Federal-Mogul World Wide, Inc.Inventors: Randall R. Gaiser, Xiluo Zhu
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Publication number: 20030075042Abstract: A monobloc piston has at least two steel parts welded together to define an inner cooling gallery. An outer ring belt is spaced from an inner annular support wall and is joined by a combustion bowl and a lower wall. A pair of pin bosses have axially aligned pin bores. A skirt is formed as one immovable piece with the pin bores.Type: ApplicationFiled: September 24, 2002Publication date: April 24, 2003Applicant: FEDERAL-MOGUL WORLD WIDE, INC.Inventors: Randall R. Gaiser, Xiluo Zhu, Roberto Bueno Nigro
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Patent number: 6526871Abstract: A steel monobloc piston for diesel engines is formed with a relatively short piston skirt whose lower edge resides below the axis of the pin bores of the piston, but located at or above a lowest tangent point of the pin bores. The piston body preferably has a closed oil cooling gallery and the skirt is preferably joined at its upper end to an outer wall of the piston in which a plurality of ring grooves are formed.Type: GrantFiled: August 24, 2001Date of Patent: March 4, 2003Assignee: Federal-Mogul World Wide, Inc.Inventors: Xiluo Zhu, Randall R. Gaiser
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Publication number: 20030037671Abstract: A steel monobloc piston for diesel engines is formed with a relatively short piston skirt whose lower edge resides below the axis of the pin bores of the piston, but located at or above a lowest tangent point of the pin bores. The piston body preferably has a closed oil cooling gallery and the skirt is preferably joined at its upper end to an outer wall of the piston in which a plurality of ring grooves are formed.Type: ApplicationFiled: August 24, 2001Publication date: February 27, 2003Applicant: Federal-Mogul World Wide, Inc.Inventors: Xiluo Zhu, Randall R. Gaiser
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Patent number: 6401680Abstract: A piston (20) for an internal combustion engine includes an upper crown (22) and a lower crown (24) that are each fabricated using a same strong material, such as steel and fastened together using a plurality of fasteners (50). The piston (20) provides increased strength resulting in improved design flexibility and smaller sized engines that produce the same amount of power. Piston ring grooves (100, 102, 104) are also provided in either one or both of the upper and lower crowns (22, 24) which control piston combustion height. A deeper combustion bowl (72) is also available with the piston (20).Type: GrantFiled: November 8, 2000Date of Patent: June 11, 2002Assignee: Federal-Mogul World Wide, Inc.Inventors: Xiluo Zhu, Duraid Mahrus, Alan S. Brown
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Publication number: 20010029840Abstract: A piston (10) particularly suited for heavy duty diesel engine applications includes upper and lower crown sections (28, 30) joined by a friction weld (32) to define an annular ring belt (14) formed with ring groves (22) and having a lower end (20) and an internal piston cooling chamber (34). A pair of pin bosses (40) depend from the ring belt (14) and are formed as one piece with the lower crown section (30). A skirt (46) is also formed as one piece with the pin bosses (40) and has an upper end (48) that is spaced from the lower end (20) of the ring belt (14) to define a space (52) therebetween which effectively uncouples the skirt (46) from the ring belt (14).Type: ApplicationFiled: December 27, 2000Publication date: October 18, 2001Applicant: Federal-Mogul World Wide, Inc.Inventors: Randall R. Gaiser, Xiluo Zhu
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Patent number: 6260472Abstract: 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).Type: GrantFiled: July 28, 1998Date of Patent: July 17, 2001Assignee: Federal-Mogul World Wide, Inc.Inventors: Xiluo Zhu, Richard R. Gofton
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Patent number: 6182630Abstract: A piston (20) for an internal combustion engine includes an upper crown (22) and a lower crown (24) that are each fabricated using a same strong material, such as steel and fastened together using a plurality of fasteners (50). The piston (20) provides increased strength resulting in improved design flexibility and smaller sized engines that produce the same amount of power. Piston ring grooves (100, 102, 104) are also provided in either one or both of the upper and lower crowns (22, 24) which control piston combustion height. A deeper combustion bowl (72) is also available with the piston (20).Type: GrantFiled: November 23, 1998Date of Patent: February 6, 2001Assignee: Federal-Mogul World Wide, Inc.Inventors: Xiluo Zhu, Duraid Mahrus, Alan S. Brown
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Patent number: 6032619Abstract: A piston (20) for an engine having a crown portion (22) that contains a generally closed cooling chamber (58) that communicates with a cooling fluid source by a cooling bore (74) formed in a pin ear (60, 62). A tube portion (80) is located along the cooling bore (74) and cooperates with the cooling bore (74) to provide a continuous inlet passageway (88) to the cooling chamber (58).Type: GrantFiled: July 16, 1998Date of Patent: March 7, 2000Assignee: Federal-Mogul World Wide, Inc.Inventors: Xiluo Zhu, Alan S. Brown