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Standard

Power Cylinder Effects on Friction and Fuel Economy
2024-01-22
CURRENT
J2904_202401
This document covers the mechanisms from the power cylinder, which contribute to the mechanical friction of an internal combustion engine. It will not discuss in detail the influence of other engine components or engine driven accessories on friction.
Standard

Internal Combustion Engines—Piston Vocabulary
2002-01-23
HISTORICAL
J2612_200201
This SAE Standard defines the most commonly used terms for pistons. These terms designate either types of pistons or certain characteristics and phenomena of pistons. The terms and definitions apply to pistons for reciprocating internal combustion engines and compressors working under analogous conditions.
Standard

Internal Combustion Engines—Piston Rings—Scraper Rings
1998-04-17
HISTORICAL
J1999_199804
Differences, where they exist, are shown in Appendix A. This SAE Standard specifies the essential dimensional features of N, NM, E, and EM scraper piston ring types. Dimensional Tables 7 and 8 offer the choice of two radial wall thicknesses: a Radial wall thickness "regular" (Table 7) b Radial wall thickness "D/22" (Table 8) The requirements of this document apply to scraper rings for reciprocating internal combustion piston engines up to and including 200 mm diameter. They may also be used for piston rings of compressors working under similar conditions.
Standard

Internal Combustion Engines—Piston Rings—Rectangular Rings
1998-04-01
HISTORICAL
J1997_199804
Differences, where they exist, are shown in Appendix A. This SAE Standard specifies the essential dimensional features of R, B, and M rectangular piston ring types. Dimensional Tables 8 and 9 offer the choice of two radial wall thicknesses: a Radial wall thickness "regular" (Table 8) b Radial wall thickness "D/22" (Table 9) The requirements of this document apply to rectangular rings for reciprocating internal combustion piston engines up to and including 200 mm diameter. They may also be used for piston rings of compressors working under similar conditions.
Standard

Internal Combustion Engines—Piston Rings—Quality Requirements
1998-04-17
HISTORICAL
J1996_199804
Differences, where they exist, are shown in Appendix A. This SAE Standard specifies the quality aspects that are capable of definition but not normally found on a drawing specification. The difficulty of trying to define in absolute terms the quality attainable in normal commercial manufacture of piston rings is well known. In this document the commonly encountered aspects of quality in terms of casting defects and other departures from ideal are quantified. Many minor defects are clearly quite acceptable; other defects because of size or numbers are inadmissible.
Standard

Internal Combustion Engines—Piston Rings—Oil Control Rings
1998-04-01
HISTORICAL
J2002_199804
Differences, where they exist, are shown in Appendix A. This SAE Standard specifies the dimensional features of S, G, D, and DV oil control piston ring types. The normal range for the axial width of oil control rings (2.5 to 8 mm inclusive) is divided into 0.5 or 1.0 increments. In Table 7, dimensions in inch units are given for oil control rings with axial width 4.75 mm (equal to 3/16 in) for existing applications. The requirements of this document apply to oil control rings for reciprocating internal combustion piston engines up to and including 200 mm in diameter. They may also be used for piston rings of compressors working under similar conditions.
Standard

Internal Combustion Engines—Piston Rings—Material Specifications
1998-04-17
HISTORICAL
J1590_199804
Differences, where they exist, are shown in Appendix A. This SAE Standard establishes a classification of materials intended for the manufacture of piston rings based on mechanical properties and the stresses that these materials are capable of withstanding. This document applies to the manufacture of piston rings up to and including 200 mm diameter for reciprocating internal combustion engines. It also applies to piston rings for compressors working under similar conditions.
Standard

Internal Combustion Engines—Piston Rings—Keystone Rings
1998-04-01
HISTORICAL
J2000_199804
Differences, where they exist, are shown in Appendix A. This SAE Standard specifies the essential dimensional features of T, TB, TM, K, KB, and KM keystone piston ring types. The requirements of this document apply to compression rings for reciprocating internal combustion engines up to and including 200 mm diameter.
Standard

Internal Combustion Engines—Piston Rings—Half Keystone Rings
1998-04-01
HISTORICAL
J2001_199804
Differences, where they exist, are shown in Appendix A. This SAE Standard specifies the essential dimensional features of HK- and HKB-half keystone rings with narrow ring width types. Dimensional and allow for the use of cast iron (Table 6) or steel (Table 7). Since the modulus of elasticity of steel rings is higher than that of cast iron rings, the fluctuation in the surface pressure will become greater if the free gap is set as the reference for forces. Therefore, forces are set using the surface pressure as the reference in order to minimize the effect of the fluctuation. The requirements of this document apply to half keystone rings of reciprocating internal combustion engines up to and including 70 mm diameter for cast iron rings and up to and including 100 mm diameter for steel rings.
Standard

Internal Combustion Engines—Piston Rings—General Specifications
1998-04-17
HISTORICAL
J1591_199804
Differences, where they exist, are shown in Appendix A. This SAE Standard specifies the general characteristics of piston rings and individual dimensional criteria, which are specified as appropriate in the documents in Section 2. This document also provides a system for coding, designation, and marking of piston rings. This document applies to the manufacture of piston rings up to and including 200 mm diameter for reciprocating internal combustion engines. It also applies to piston rings for compressors working under similar conditions.
Standard

Internal Combustion Engines—Piston Rings—Expander/Segment Oil Control Rings
1998-04-01
HISTORICAL
J2004_199804
Differences, where they exist, are shown in Appendix A with associated rationale. This SAE Standard specifies the dimensional features of commonly used oil control rings having two steel segments (rails) separated and expanded by one steel expander/spacer. The segments vary in width from 0.4 to 0.6 mm. The assembly width ranges from 2.5 to 4.75 mm. The 4.75 mm width is equivalent to existing 3/16 in applications. Expander design will vary considerably with piston ring manufacturer. The total circumferential deflection and the piston groove depth should be considered when designing these oil rings to optimize the fit of the ring assembly into the piston groove. This document applies to oil control rings up through 125 mm for reciprocating internal combustion engines. It may also be used for piston rings of compressors working under similar conditions.
Standard

Internal Combustion Engines—Piston Rings— Rectangular Rings With Narrow Ring Width
1998-04-17
HISTORICAL
J1998_199804
Differences, where they exist, are shown in Appendix A. This SAE Standard specifies the essential dimensional features of R, B, and M rectangular piston ring types with narrow ring width. Dimensional Tables 8 and 9 allow for the use of cast iron (Table 8) or steel (Table 9). Since the modulus of elasticity of steel rings is higher than that of cast iron rings, the fluctuation in the surface pressure will become greater if the free gap is set as the reference for force. Therefore, forces are set using the surface pressure as the reference, in order to minimize the effect of the fluctuation. The requirements of this document apply to rectangular rings for reciprocating internal combustion engines up to and including 90 mm diameter for cast iron rings and up to and including 100 mm diameter for steel. They may also be used for piston rings of compressors working under similar conditions.
Standard

Internal Combustion Engines--Piston Rings--Steel Rectangular Rings
2008-06-30
CURRENT
J2226_200806
There is no standard equivalent to this SAE Standard. However, SAE J2226 is similar to and represents an extension of SAE J1998 (equivalent to ISO Standard 6622/2 TR). This SAE Standard specifies the essential dimensional features of Type B barrel faced steel rectangular piston rings. Only fully faced and inlaid coated rings are included, consistent with current U.S. practice. The requirements of this SAE Standard apply to steel piston rings of reciprocating internal combustion engines, up to and including 200 mm diameter and 4.5 mm width. Tolerances specified in this document represent a six sigma quality level.
Standard

Internal Combustion Engines - Piston Vocabulary
2020-02-18
CURRENT
J2612_202002
This SAE standard defines the most commonly used terms for pistons. These terms designate either types of pistons or certain characteristics and phenomena of pistons.
Standard

INTERNAL COMBUSTION ENGINES—PISTON RINGS—STEEL RECTANGULAR RINGS
1998-04-01
HISTORICAL
J2226_199804
There is no standard equivalent to this SAE Standard. However, SAE J2226 is similar to and represents an extension of SAE J1998 (equivalent to ISO Standard 6622/2 TR). This SAE Standard specifies the essential dimensional features of Type B barrel faced steel rectangular piston rings. Only fully faced and inlaid coated rings are included, consistent with current U.S. practice. The requirements of this SAE Standard apply to steel piston rings of reciprocating internal combustion engines, up to and including 200 mm diameter and 4.5 mm width. Tolerances specified in this document represent a six sigma quality level.
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