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Gap geometry in a cohesively joined cooling-channel piston

A technology of cooling channels and geometric structures, applied in the direction of pistons, machines/engines, mechanical equipment, etc.

Active Publication Date: 2017-05-10
KOLBENSCHMIDT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, however, if the gap is too large, the coolant can penetrate through this gap outwards in the direction of the cylinder wall in an undesired amount

Method used

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  • Gap geometry in a cohesively joined cooling-channel piston
  • Gap geometry in a cohesively joined cooling-channel piston
  • Gap geometry in a cohesively joined cooling-channel piston

Examples

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Embodiment Construction

[0036] In the following description of the figures, terms such as upper, lower, above, below, left, right, front, rear etc. refer only to the selected exemplary illustrations and positions of devices and other elements in the respective figures. These terms are not to be understood in a restrictive manner, ie the references can be changed by different positions and / or mirror-symmetrical designs etc.

[0037] The same elements keep the same reference numerals in all figures.

[0038] figure 1 shows the cooling channel piston 1 and image 3 A cooling channel piston 100 is shown. The cooling channel piston 1 has an upper part 2 and a lower part 3 . The cooling channel piston 100 has an upper part 102 and a lower part 103 . The two cooling channel pistons 1 , 100 have ring regions 4 for receiving piston rings (not shown). Adjacent to the ring region 4 in the direction of the central piston stroke axis 5 there is provided a cooling channel 6 for receiving a cooling medium, pr...

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PUM

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Abstract

The invention relates to a cooling-channel piston (1, 100) for an internal combustion engine, having an upper part (2, 102) and a lower part (3, 103), wherein said two parts (2, 3; 102, 103) are connected to one another by way of a cohesive joint in the form of a weld seam (11), and said two parts (2, 3; 102, 103) form an annularly encircling cooling channel (6) which is arranged approximately behind a ring section (4), wherein a gap geometry (13, 113) is provided between a lower edge (16) of the ring section (4) and an upper edge (17) of a lower part (3, 103), wherein the gap geometry (3, 113) has at least one sliding surface (19) which is arranged on a lower edge (16) of the ring section (4) of the cooling-channel piston (1, 100) and / or on the corresponding upper edge (17) of a lower part (3, 103) of the cooling-channel piston (1, 100), and to several methods for the operation of a cooling-channel piston.

Description

technical field [0001] The invention relates to a cooling duct piston for an internal combustion engine and methods for operating a cooling duct piston having a material-bonded joint Clearance geometry in cooling channels. Background technique [0002] The cooling channel piston has an upper piston part and a lower piston part, wherein the two parts are connected to one another by a materially bonded connection, in particular a friction welded connection. After the connection, the two parts form a ring-shaped cooling channel which is arranged approximately behind the annular region. Optionally, the cooling channel piston can have a cooling chamber, a transfer channel between the cooling channel and the cooling chamber, and a cooling bladder. In order to implement the teaching of this document, no cooling chamber is required, nor is a transfer channel, nor is a cooling bladder required. [0003] A friction-welded connection of the upper part and the lower part is particula...

Claims

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Application Information

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IPC IPC(8): F02F3/00F02F3/22
CPCF02F3/003F02F3/22F02F2003/0061
Inventor M·拉夸V·莱纳特
Owner KOLBENSCHMIDT AG