ISO 6622-1:2021 内燃機関—ピストンリング—パート1：鋳鉄製の長方形リング | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, 2 (see www.iso.org/directives ).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents ).

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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 6622-1:2003), which has been technically revised.

The main changes compared to the previous edition are as follows:

• figures were updated for a better understanding;
• added M6 taper in Table 3;
• added h₁₉ dimension in Table 5;
• editorial adaptations according to ISO directives.

A list of all parts in the ISO 6622 series can be found on the ISO website.

Introduction

The ISO 6622 series is one of a number of series of International Standards dealing with piston rings for reciprocating internal combustion engines. Others are ISO 6621,^[2],[3],[4] ISO 6623,^[5] ISO 6624 ^{[6],[7], [8][9],}, ISO 6625,^[10] ISO 6626 ^[11],[12] and ISO 6627 ^[13].

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

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

1 Scope

This document specifies the essential dimensional features of rectangular rings made of cast iron, Types R, B, BA and M, having diameters up to and including 200 mm, used in reciprocating internal combustion piston engines. It is also applicable to piston rings of compressors working under similar conditions.

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

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

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

Bibliography