REDUCED COMPRESSION HEIGHT PISTON AND PISTON ASSEMBLY THEREWITH AND METHODS OF CONSTRUCTION THEREOF
First Claim
1. A piston assembly for an internal combustion engine, comprising:
- a piston head having an upper combustion wall with an undercrown surface and a ring belt region depending from said upper combustion wall, a floor having an upper surface and a bottom surface, said floor being spaced beneath said upper combustion wall in radial alignment with said ring belt region, a substantially enclosed, annular cooling gallery bounded by said undercrown surface and said floor, said cooling gallery extending radially inwardly from said ring belt region;
a pair of pin bores depending directly from the floor of the cooling gallery;
a pin having ends configured for oscillating receipt in the pin bores;
a pin bearing surface extending within said pin bores and between said pin bores in said lower surface of said floor; and
a connecting rod having an end fixed to the pin for conjoint oscillation therewith.
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Accused Products
Abstract
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.
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Citations
32 Claims
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1. A piston assembly for an internal combustion engine, comprising:
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a piston head having an upper combustion wall with an undercrown surface and a ring belt region depending from said upper combustion wall, a floor having an upper surface and a bottom surface, said floor being spaced beneath said upper combustion wall in radial alignment with said ring belt region, a substantially enclosed, annular cooling gallery bounded by said undercrown surface and said floor, said cooling gallery extending radially inwardly from said ring belt region; a pair of pin bores depending directly from the floor of the cooling gallery; a pin having ends configured for oscillating receipt in the pin bores; a pin bearing surface extending within said pin bores and between said pin bores in said lower surface of said floor; and a connecting rod having an end fixed to the pin for conjoint oscillation therewith. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A piston for an internal combustion engine, comprising:
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a piston head having an upper combustion wall with an undercrown surface and a ring belt region depending from said upper combustion wall, a floor having an upper surface and a bottom surface, said floor being spaced beneath said upper combustion wall in radial alignment with said ring belt region, a substantially enclosed, annular cooling gallery bounded by said undercrown surface and said floor, said cooling gallery extending radially inwardly from said ring belt region; a pair of pin bores depending directly from the floor of the cooling gallery; and a pin bearing surface extending within said pin bores and between said pin bores on said lower surface of said floor. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of constructing a piston assembly for an internal combustion engine, comprising:
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forming a piston head having an upper combustion wall with an undercrown surface and a ring belt region depending from said upper combustion wall and having a floor spaced beneath the upper combustion wall in radial alignment with the ring belt region, with a substantially enclosed, annular cooling gallery bounded by the undercrown surface and the floor; forming a pair of pin bores extending directly from the floor of the cooling gallery; forming a pin bearing surface extending within the pin bores and between the pin bores within a lower surface of the floor; inserting a pin for oscillating receipt in the pin bores; and fixing an end of a connecting rod directly to the pin for conjoint oscillation therewith. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification