Piston and method of construction thereof
US-9212621-B2 · Dec 15, 2015 · US
Multi-part piston for an internal combustion engine and method for the production thereof
US8991046B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8991046-B2 |
| Application number | US-201013383682-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 29, 2010 |
| Priority date | Jul 14, 2009 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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- Title
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Abstract
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The present invention relates to a method for producing a multi-part piston ( 10, 110 ) for an internal combustion engine, comprising the following method steps: producing an upper piston part ( 11 ) and a lower piston part ( 12 ), each having an inner support element ( 22, 26; 122, 126 ) having joining surfaces ( 24, 28; 124, 128 ) and an outer support element ( 23, 27; 123, 127 ) having joining surfaces ( 25, 29; 125, 129 ), applying a high-temperature solder material in the area of at least one joining surface ( 24, 28 or 25, 29; 124, 128 or 125, 129 ), assembling the upper piston part ( 11 ) and the lower piston part ( 12 ) to form a piston body by establishing a contact between the joining surfaces ( 24, 28 or 25, 29; 124, 128 or 125, 129 ), placing the piston body in a vacuum furnace and evacuating the vacuum furnace; heating the piston body at a pressure of at most 10 −2 mbar to a soldering temperature of at most 1300° C.; cooling the soldered piston ( 10, 110 ) at a pressure of at most 10 −2 mbar until the high-temperature solder material is completely solidified. The present invention further relates to a piston ( 10, 110 ) that can be produced by means of the method.
First claim
Opening claim text (preview).
The invention claimed is: 1. Method for the production of a multi-part piston ( 10 , 110 ) for an internal combustion engine, having the following method steps: a) producing an upper piston part ( 11 ) and a lower piston part ( 12 ) from AFP steel, having an inner support element ( 22 , 26 ; 122 , 126 ) with joining surfaces ( 24 , 28 ; 124 , 128 ) and an outer support element ( 23 , 27 ; 123 , 127 ) with joining surfaces ( 25 , 29 ; 125 , 129 ), in each instance, b…
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Frequently asked questions
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- What does patent US8991046B2 cover?
- The present invention relates to a method for producing a multi-part piston ( 10, 110 ) for an internal combustion engine, comprising the following method steps: producing an upper piston part ( 11 ) and a lower piston part ( 12 ), each having an inner support element ( 22, 26; 122, 126 ) having joining surfaces ( 24, 28; 124, 128 ) and an outer support element ( 23, 27; 123, 127 ) having joini…
- Who is the assignee on this patent?
- Schulz Joachim, Kortas Jochen, Mahle Int Gmbh
- What technology area does this patent fall under?
- Primary CPC classification F02F3/003. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 31 2015 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).