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Pressure ring

A pressure ring and ring-shaped technology, which is applied in the field of pressure rings, can solve the problems of ring groove wear and aluminum to the pressure ring, and achieve the effect of inhibiting fixation

Inactive Publication Date: 2016-05-11
RIKEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, wear of the ring groove and adhesion of aluminum to the pressure ring are likely to occur

Method used

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Experimental program
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Effect test

no. 1 approach

[0033] The pressure ring of the first embodiment is a piston ring for an internal combustion engine (for example, an automobile engine). The pressure ring is fitted into, for example, a ring groove formed on a side surface of a cylindrical piston included in an internal combustion engine. The piston is inserted into the combustion chamber (cylinder) of the engine. In particular, the pressure ring can also be a ring that is exposed to an environment with a high thermal load on the engine.

[0034] The structure of the pressure ring of this embodiment will be described. Such as Figure 6 , Figure 7 a and Figure 7 As shown in b, the pressure ring 11 includes an annular body portion 12 (base material) and a first membrane 14 . An opening 13 is formed in the ring-shaped main body 12 . That is, "annular" does not necessarily mean a closed circle. The ring-shaped main body portion 12 may be a perfect circle or an ellipse. The main body part 12 has the planar side surfaces 1...

no. 2 approach

[0064] The pressure ring of the second embodiment is the same as the pressure ring of the first embodiment except that the steel material constituting the main body part contains Cu. Hereinafter, only the unique features of the pressure ring of the second embodiment will be described.

[0065] The main body portion 12 of the pressure ring according to the second embodiment is made of a steel material consisting of 0.45 to 0.55% by mass of C, 0.15 to 0.35% by mass of Si, 0.65 to 0.95% by mass of Mn, and 0.80 to 1.10% by mass of Cr. , 0.25% by mass or less of V, less than 0.010% by mass of P, 0.02 to 0.25% by mass of Cu (copper), and the remainder including Fe and unavoidable impurities. The content of Cu in the steel may be 0.02-0.25 mass%, 0.02-0.20 mass%, 0.02-0.16 mass%, 0.04-0.25 mass%, 0.04-0.20 mass%, 0.04-0.16 mass%, or 0.16-0.25 mass% .

[0066] In the manufacture of the pressure ring of the second embodiment, the wire rod is produced by drawing a steel material, as i...

Embodiment 1

[0070] (Examples 1 to 4, Comparative Example 1)

[0071] Using steel materials J1, J2, J3, J4, and C1 each having a composition shown in Table 2 below, pressure rings were fabricated by the following method. It should be noted that all the steel materials naturally contain iron in addition to the elements shown in Table 2 below. The pressure ring using the steel material J1 is Example 1. The pressure ring using steel material J2 is Example 2. The pressure ring using steel material J3 is Example 3. The pressure ring using steel material J4 is Example 4. The pressure ring using steel material C1 is Comparative Example 1. Steel C1 is equivalent to SUP10. Hereinafter, Example 1 will be referred to as J1, Example 2 will be referred to as J2, Example 3 will be referred to as J3, Example 4 will be referred to as J4, and Comparative Example 1 will be referred to as C1 depending on the circumstances.

[0072] The drawing process is carried out on the steel material. In the wire ...

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Abstract

Provided is a pressure ring which suffers from little adhesion of a piston material. This pressure ring (11) is provided with an annular body (12) made of a steel material which consists of 0.45 to 0.55mass% C, 0.15 to 0.35mass% Si, 0.65 to 0.95mass% Mn, 0.80 to 1.10mass% Cr, at most 0.25mass% V, less than 0.010mass% P, and the balance Fe with unavoidable impurities.

Description

technical field [0001] The present invention relates to pressure rings. Background technique [0002] In recent years, in order to suppress the load on the environment, improvements in fuel efficiency, lower emissions, and higher output of automobile engines have been achieved. Therefore, it is required to increase the compression ratio of the air-fuel mixture sucked into the combustion chamber of the automobile engine and to increase the engine load. However, when the compression ratio is generally increased, the temperature of the combustion chamber rises, and knocking tends to occur. As a normal countermeasure against knocking, a countermeasure for retarding the ignition timing (advance angle) is performed. In this case, high thermal efficiency cannot be maintained. Therefore, studies have also been made on the direction of lowering the temperature of the combustion chamber wall. In order to lower the temperature of the combustion chamber wall, it is effective to lowe...

Claims

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Application Information

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IPC IPC(8): F16J9/26C22C38/18C22C38/24F02F5/00C22C38/00
CPCC21D9/40C22C38/00C22C38/001C22C38/002C22C38/02C22C38/04C22C38/20C22C38/24C22C38/58F16J9/26F16J15/16C22C38/22F16J9/28
Inventor 岛祐司高桥纯也
Owner RIKEN CO LTD
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