ISO 6626-2:2024 内燃機関 — ピストン リング — Part 2:鋳鉄製の幅の狭いコイル スプリング式オイル コントロール リング | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 34, Propulsion, powertrain and powertrain fluids.

This third edition cancels and replaces the second edition (ISO 6626-2:2013), which has been technically revised.

The main changes are as follows:

• classes of nominal contact pressure moved to ISO 6626-1:2024, Annex A and introduced normalized tangential force;
• verification and correction of figures;
• update of dimension in Tables 8 to 16.

A list of all parts in the ISO 6626 series can be found on the ISO website.

Introduction

The ISO 6626 series is one of a series of International Standards dealing with piston rings for reciprocating internal combustion engines. Others are the ISO 6621 series, ISO 6622, ISO 6623, ISO 6624, ISO 6625, the ISO 6626 series and ISO 6627.

The common features and dimensional tables presented in this document constitute a broad range of variables and, in selecting a particular ring type, the designer should be aware of the conditions under which it will be required to operate.

1 Scope

This document specifies the essential dimensional features of coil-spring loaded oil control rings made of cast iron, types DSF-C, SSF, GSF, DSF, SSF-L, DSF-NG and DSF-CNP. It is applicable to those piston rings in sizes 60 mm up to 160 mm, inclusive for reciprocating internal combustion engines for road vehicles and other applications.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

No terms and definitions are listed in this document.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

Bibliography