LIGHTWEIGHT POWER CELL UNIT
First Claim
1. A power cell unit, comprising:
- a piston assembly having a piston crown and a piston skirt, the piston crown including a ring belt portion extending circumferentially about a combustion bowl and at least one boss portion extending downward from the combustion bowl;
a connecting rod having an elongated portion and a funnel portion at one end of the elongated portion; and
at least one piston pin configured to connect the connecting rod with the piston assembly;
wherein a bottom surface of the at least one boss portion of the piston crown engages with a corresponding surface of the funnel portion of the connecting rod such that a gas load is substantially transferred directly from the piston crown to the connecting rod during downward movement of the piston assembly.
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Accused Products
Abstract
A power cell unit may include a piston assembly having a piston crown and a piston skirt. The piston crown may include a ring belt portion extending circumferentially about a combustion bowl and at least one boss portion extending downward from the combustion bowl. The power cell unit may also include a connecting rod having an elongated portion and a funnel portion, and at least one piston pin configured to connect the connecting rod with the piston assembly. A bottom surface of the at least one boss portion may engage with a corresponding surface of the funnel portion such that a gas load is substantially transferred directly from the piston crown to the connecting rod during downward motion of the piston assembly, and such that only inertial loading from the piston crown and/or piston skirt is transferred to the piston pin during upward motion of the piston assembly.
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Citations
20 Claims
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1. A power cell unit, comprising:
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a piston assembly having a piston crown and a piston skirt, the piston crown including a ring belt portion extending circumferentially about a combustion bowl and at least one boss portion extending downward from the combustion bowl; a connecting rod having an elongated portion and a funnel portion at one end of the elongated portion; and at least one piston pin configured to connect the connecting rod with the piston assembly; wherein a bottom surface of the at least one boss portion of the piston crown engages with a corresponding surface of the funnel portion of the connecting rod such that a gas load is substantially transferred directly from the piston crown to the connecting rod during downward movement of the piston assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method, comprising:
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moving a piston assembly of a power cell unit in a reciprocating manner, the piston assembly having a piston crown and a piston skirt, the piston crown including a ring belt portion extending circumferentially about a combustion bowl and at least one boss portion extending downward from the combustion bowl; transferring a gas load generated by the reciprocating movement of the piston assembly directly from the piston crown to a connecting rod of the power cell unit through a contact between a bottom surface of the at least one boss portion and a surface of a funnel of the connecting rod; and transferring an inertial load from at least one of the piston crown and the piston skirt to at least one piston pin that rotatably secures the piston assembly to the connecting rod. - View Dependent Claims (14, 15, 16)
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17. A power cell unit, comprising:
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a piston assembly; a connecting rod; and at least one piston pin configured to connect the connecting rod with the piston assembly; wherein the piston assembly engages with the connecting rod during reciprocal movement of the piston assembly such that a gas load generated from downward movement of the piston assembly substantially transfers directly from the piston assembly to the connecting rod, and approximately no more than an inertial load generated from upward movement of the piston assembly is transferred to the at least one piston pin; and wherein a compression height ratio of a compression height of the power cell unit to a diameter of the piston assembly ranges from 20% to 37%. - View Dependent Claims (18, 19, 20)
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Specification