Piston for an internal combustion engine
First Claim
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1. A piston for an internal combustion engine, comprising:
- a lower part;
an upper part, wherein the lower part and the upper part cooperate to define at least a portion of a generally closed circumferential cooling gallery, the cooling gallery being defined in part by a gallery bottom; and
a circumferential bar positioned on the gallery bottom, the circumferential bar defining at least one coolant inlet and at least one coolant outlet extending through the gallery bottom;
wherein at least one of the at least one coolant inlet and the at least one coolant outlet includes a first aperture and a passage extending therefreom, the passage leading to a plurality of additional apertures on an interior of the cooling gallery, wherein the plurality of additional apertures are spaced away from the first aperture such that the passage is a generally V-shaped passage.
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Abstract
Exemplary pistons are disclosed, e.g., for an internal combustion engine. An exemplary piston includes a lower part and an upper part, whereby the lower part and the upper part define a circumferential closed cooling gallery. The cooling gallery may be provided with a gallery bottom. The piston may further include a circumferential bar positioned on the gallery bottom, the circumferential bar defining at least one coolant inlet and at least one coolant outlet extending through the bar.
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Citations
20 Claims
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1. A piston for an internal combustion engine, comprising:
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a lower part; an upper part, wherein the lower part and the upper part cooperate to define at least a portion of a generally closed circumferential cooling gallery, the cooling gallery being defined in part by a gallery bottom; and a circumferential bar positioned on the gallery bottom, the circumferential bar defining at least one coolant inlet and at least one coolant outlet extending through the gallery bottom; wherein at least one of the at least one coolant inlet and the at least one coolant outlet includes a first aperture and a passage extending therefreom, the passage leading to a plurality of additional apertures on an interior of the cooling gallery, wherein the plurality of additional apertures are spaced away from the first aperture such that the passage is a generally V-shaped passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A piston for an internal combustion engine, comprising:
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a piston head, including a piston crown, a circumferential top land, and a circumferential ring-receiving part; and a piston skirt, including piston pin bosses defining pin bores, the piston pin bosses being connected by bearing surfaces, the skirt cooperating with the piston head to define a circumferential closed cooling gallery adjacent the ring-receiving part, the cooling gallery including a gallery bottom; wherein the piston includes a lower part and an upper part, both cooperating to at least partially form the cooling gallery, the lower part forming at least the gallery bottom of the cooling gallery; and wherein a circumferential bar is arranged on the gallery bottom, at least one coolant inlet and at least one coolant outlet being defined by the circumferential bar, each of the at least one coolant inlet and at least one coolant outlet extending through the gallery bottom; and wherein at least one of the at least one coolant inlet and the at least one coolant outlet includes a first aperture and a passage extending therefreom, the passage leading to a plurality of additional apertures on an interior of the cooling gallery, wherein the plurality of additional apertures are spaced away from the first aperture such that the passage is a generally V-shaped passage. - View Dependent Claims (17, 18, 19)
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20. A piston for an internal combustion engine, comprising:
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a lower part; an upper part, wherein the lower part and the upper part cooperate to define at least a portion of a generally closed circumferential cooling gallery, the cooling gallery being defined in part by a gallery bottom; and a circumferential bar positioned on the gallery bottom, the circumferential bar defining a coolant inlet extending through the gallery bottom; wherein the coolant inlet includes a first aperture and a passage extending therefreom, the passage leading to a plurality of additional apertures on an interior of the cooling gallery, wherein the plurality of additional apertures are spaced away from the first aperture such that the passage is a generally V-shaped passage.
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Specification