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Piston rings including wear indicators

A wear indicator and piston ring technology, applied in the field of piston rings, can solve the problem of determining the wear condition of piston rings and the like

Active Publication Date: 2016-12-14
FEDERAL MOGUL BURSCHEID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It is currently not possible to determine piston ring wear without removing the piston from the cylinder

Method used

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  • Piston rings including wear indicators
  • Piston rings including wear indicators
  • Piston rings including wear indicators

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] figure 1 It is a sectional view of a basic embodiment of the piston ring of the present invention. Piston ring 2 is equipped with a wear indicator 42 . The piston ring 2 comprises a piston ring body or piston ring blank 4 having an outer surface 6 , an upper ring side wall 8 and a lower ring side wall 10 . The outer surface 6 of the piston ring body 4 is provided with structures 14 protruding outwards by a height h. The structure is shown in a near-to-scale manner, so in figure 1 The height h, which may be 0.03 mm, for example, is hardly recognizable in . The width of the wear indicator 42 is marked B and should be 0.1 to 0.3 mm here. A wear protection layer 12 covering the protruding structures 14 of the wear indicator 42 is applied to the outer surface 6 . The wear protection layer 12 has a thickness D of approximately 0.3 mm, which reduces the height h of the raised structures in the region of the raised structures 14 . In the event of further wear of the slidi...

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PUM

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Abstract

The invention relates to a piston ring (2) having wear indication (42), comprising a piston ring body (4). The piston ring body has an outer surface (6), an upper ring flank (8), and a lower ring flank (10). The outer surface (6) of the piston ring body (4) is provided with a structure (14) that protrudes outward by a height (h). A wear protection layer (12) is applied to the outer surface (6), which wear protection layer covers the protruding structure (14). The wear protection layer (12) has a thickness (D) that is reduced by the height (h) of the protruding structure in the region of the protruding structuring (14).

Description

technical field [0001] The invention relates to a piston ring having a wear indicator on its outer sliding surface. Background technique [0002] Piston rings have been known since the days of internal combustion engines. [0003] In large internal combustion engines, the wear of the piston rings is regularly checked by visual inspection or by layer thickness measurement of the sliding surface coating. However, it is often difficult for users to make reliable assessments due to location constraints. Furthermore, internal combustion engine manufacturers are increasingly replacing standard inspection cycles with state-specific maintenance measures. This makes it easier to reach the wear limits of internal combustion engine components and piston rings. [0004] Piston rings have hitherto been evaluated visually or by layer thickness measurements. It is difficult to obtain information about the remaining residual layer thickness of the sliding surface coating by visual evalu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J9/00F16J9/12
CPCF16J9/26
Inventor 弗兰克·内森彼得·施密特
Owner FEDERAL MOGUL BURSCHEID