ISO 6626-1:2024 内燃機関 — ピストン リング — Part 1:鋳鉄製のコイル 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 first edition cancels and replaces ISO 6626:1989, which has been technically revised.

The main changes are as follows:

• classes of nominal contact pressure were moved to Annex A and the normalized tangential force was introduced;
• verification and correction of figures;
• update of dimension Tables 8 to 25.

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 set 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. When selecting a particular ring type, the designer should bear in mind the conditions under which it will be required to operate.

It is also important that the designer refer to the specifications and requirements of ISO 6621-3 and ISO 6621-4 before completing selection.

1 Scope

This document specifies the essential dimensional features of coil-spring loaded oil control rings made of cast iron, types DSF-C, DSF-CNP, SSF, GSF, DSF, DSF-NG and SSF-L. It is applicable to piston rings in sizes from 60 mm up to and including 200 mm 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 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.

ISO 6621‑1, Internal combustion engines — Piston rings — Part 1: Vocabulary

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 6621-1 apply.

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

Bibliography