Multi-part piston for an internal combustion engine and method for its production
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Accused Products
Abstract
The present invention relates to a multi-part piston (10) for an internal combustion engine, having an upper piston part (11) having a piston crown (13), and a lower piston part (12), whereby the lower piston part (12) has pin boss supports (32) and pin bosses (18) connected with them, whereby the upper piston part (11) and the lower piston part (12) each have an inner (21, 25) and an outer (22, 26) support element, which elements delimit an outer circumferential cooling channel (29). According to the invention, it is provided that the inner support elements (21, 25) delimit a cavity (31) that is open toward the pin bosses (18), and that the cavity (31) is provided with a separate cooling oil collector (35) that has at least one cooling oil opening (37, 38).
31 Citations
19 Claims
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1. (canceled)
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14. A method for the production of a multi-part piston for an internal combustion engine, comprising the following method steps:
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producing an upper piston part having a piston crown as well as an inner and an outer support element, producing a lower piston part having a skirt and having pin boss supports and pin bosses connected with said pin boss supports, as well as having an inner and an outer support element, inserting a separate cooling oil collector, having at least one cooling oil opening, into the upper piston part or the lower piston part, connecting the upper piston part and the lower piston part in such a manner that each of the inner and outer support elements delimit an outer circumferential cooling channel and a cavity that is open toward the pin bosses and provided with the cooling oil collector. - View Dependent Claims (15, 16, 17, 18)
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19. A multi-part piston for an internal combustion engine, comprising:
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an upper piston part having a piston crown, a first inner support element, and a first outer support element; and
a lower piston part having a piston skirt, a second inner support element, a second outer support element, pin boss supports and pin bosses connected with said pin boss supports,wherein said first and second inner support elements and first and second outer support elements delimit an outer circumferential cooling channel, wherein said first and second inner support elements delimit a cavity that is open toward the pin bosses, and wherein said cavity is provided with a separate cooling oil collector, said separate cooling oil collector having at least one cooling opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification