Multi-layered piston crown for opposed-piston engines
US-10119493-B2 · Nov 6, 2018 · US
Complex-shaped forged piston oil galleries
US10247134B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10247134-B2 |
| Application number | US-201715657661-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 24, 2017 |
| Priority date | Feb 18, 2013 |
| Publication date | Apr 2, 2019 |
| Grant date | Apr 2, 2019 |
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- Title
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Abstract
Official abstract text for this publication.
A steel piston with an oil gallery, and process for forming a steel piston oil gallery channel, which corresponds to the complex shape of the combustion bowl in the piston crown. The oil gallery channel is first forged to the basic shape that corresponds to the shape of the walls of the combustion bowl. Machine-turning surfaces in the oil gallery channel can be machine-finished as desired. Surfaces in the oil gallery which cannot be machined with conventional turning operations, such as recesses and protrusions into the channel, are left in the original forged condition.
First claim
Opening claim text (preview).
What is claimed is: 1. A piston for an internal combustion engine comprising a piston body that is at least partially fabricated of forged steel including at least one pin boss, at least one piston skirt portion; a combustion bowl recessed in an upper surface of said piston body, and an oil gallery below said combustion bowl, and wherein said oil gallery has a radially inner wall surface with machined portions thereof that have a machine-turned finish and recessed unmachined portions that do not have a machine-turned finish. 2. The piston of claim 1 wherein the machined portions are adjacent to the unmachined portions. 3. The piston of claim 1 wherein the oil gallery includes a bottom wall. 4. The piston of claim 1 wherein the piston is made of two pieces joined together. 5. The piston of claim 1 wherein the combustion bowl has a complex shape and the inner wall surface of the oil gallery at least in part corresponds in shape to that of the combustion bowl.
Assignees
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Classifications
Forging of engine parts · CPC title
Steel · CPC title
the parts being connected by casting, brazing, welding or clamping · CPC title
by welding · CPC title
the fluid being liquid · CPC title
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Frequently asked questions
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- What does patent US10247134B2 cover?
- A steel piston with an oil gallery, and process for forming a steel piston oil gallery channel, which corresponds to the complex shape of the combustion bowl in the piston crown. The oil gallery channel is first forged to the basic shape that corresponds to the shape of the walls of the combustion bowl. Machine-turning surfaces in the oil gallery channel can be machine-finished as desired. Surf…
- Who is the assignee on this patent?
- Fed Mogul Llc, Tenneco Inc
- What technology area does this patent fall under?
- Primary CPC classification F02F3/285. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Apr 02 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).