Piston with Cooling Gallery and Closed Collar Chamber
First Claim
1. A piston, comprising:
- a piston crown including radially inner and outer crown mating surfaces, the crown defining at least in part a cooling gallery extending about a periphery of the crown, the crown including a crown collar wall extending downward to a crown collar end; and
a piston skirt, including;
a pair of oppositely disposed pin bosses, the pin bosses each defining piston pin bores and cooperating to define a generally open central region configured to receive a connecting rod between the pin bosses;
a radially inner skirt mating surface abutted along a radially inner interface region with the radially inner crown mating surface;
a radially outer skirt mating surface abutted along a radially outer interface region with the radially outer crown mating surface such that the cooling gallery is substantially enclosed; and
a skirt collar wall disposed radially inwardly of the radially inner interface region and extending upwards to the free end of the crown collar wall.
1 Assignment
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Accused Products
Abstract
Pistons and methods of making the same are disclosed. An exemplary piston assembly may include a piston crown and skirt. The crown may include a crown collar wall extending downward toward a free end of the crown collar wall. The skirt may include a pair of oppositely disposed pin bosses that each define piston pin bores configured to receive a piston pin for securing a connecting rod between the pin bosses. The skirt may further include a radially inner skirt mating surface abutted along a radially inner interface region with the radially inner crown mating surface, and a radially outer skirt mating surface abutted along a radially outer interface region with the radially outer crown mating surface such that a cooling gallery is substantially enclosed. The skirt may further include an inner collar wall extending upwards to the free end of the crown collar wall.
15 Citations
22 Claims
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1. A piston, comprising:
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a piston crown including radially inner and outer crown mating surfaces, the crown defining at least in part a cooling gallery extending about a periphery of the crown, the crown including a crown collar wall extending downward to a crown collar end; and a piston skirt, including; a pair of oppositely disposed pin bosses, the pin bosses each defining piston pin bores and cooperating to define a generally open central region configured to receive a connecting rod between the pin bosses; a radially inner skirt mating surface abutted along a radially inner interface region with the radially inner crown mating surface; a radially outer skirt mating surface abutted along a radially outer interface region with the radially outer crown mating surface such that the cooling gallery is substantially enclosed; and a skirt collar wall disposed radially inwardly of the radially inner interface region and extending upwards to the free end of the crown collar wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A piston, comprising:
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a piston crown including radially inner and outer crown mating surfaces, the crown defining at least in part a cooling gallery extending about a periphery of the crown, the crown including a crown collar wall extending downward to a crown collar end; and a piston skirt, including; a pair of oppositely disposed pin bosses configured to receive a connecting rod between the pin bosses; a radially inner skirt mating surface abutted along a radially inner interface region with the radially inner crown mating surface; a radially outer skirt mating surface abutted along a radially outer interface region with the radially outer crown mating surface such that the cooling gallery is substantially enclosed; and a skirt collar wall disposed adjacent one of the radially inner and radially outer interface regions and extending upwards to the free end of the crown collar wall. - View Dependent Claims (15)
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16. A method, comprising:
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providing a piston crown including radially inner and outer crown mating surfaces, the crown defining at least in part a cooling gallery extending about a periphery of the crown; abutting the inner and outer crown mating surface with corresponding inner and outer skirt mating surfaces of a piston skirt to form a radially inner interface region between the inner mating surfaces, a radially outer interface region between the outer mating surfaces, and a cooling gallery disposed between the radially inner and outer interface regions, the skirt including a pair of oppositely disposed pin bosses defining piston pin bores and cooperating to define a generally open central region configured to receive a connecting rod between the pin bosses; forming a crown collar wall extending downward from the crown to a crown collar end; and providing a skirt collar wall disposed radially inwardly of the radially inner interface region and extending upwards to the free end of the crown collar wall. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification