1、BRITISH STANDARD BS ISO 6743-15:2007 Lubricants, industrial oils and related products (class L) Classification Part 15: Family E (Internal combustion engine oils) ICS 75.100 BS ISO 6743-15:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on
2、30 November 2007 BSI 2007 ISBN 978 0 580 54910 6 National foreword This British Standard is the UK implementation of ISO 6743-15:2007. It supersedes ISO 6743-15:2000 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PTI/7, Lubricants and process fluids.
3、 A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity fr
4、om legal obligations. Amendments issued since publication Amd. No. Date Comments Reference number ISO 6743-15:2007(E)INTERNATIONAL STANDARD ISO 6743-15 Second edition 2007-11-01 Lubricants, industrial oils and related products (class L) Classification Part 15: Family E (Internal combustion engine oi
5、ls) Lubrifiants, huiles industrielles et produits connexes (classe L) Classification Partie 15: Famille E (Huiles pour moteurs combustion interne) BS ISO 6743-15:2007ii iii Contents Page Foreword iv Introduction . vi 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Symbols used 2
6、5 Detailed classification 3 Annex A (informative) Background and supplemental information about the classification of two- stroke cycle gasoline engine oils 4 Annex B (informative) Background and supplemental information about the classification of four- stroke cycle gasoline engine oils 5 Bibliogra
7、phy . 6 BS ISO 6743-15:2007iv 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 interes
8、ted 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 C
9、ommission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the tech
10、nical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO
11、shall not be held responsible for identifying any or all such patent rights. ISO 6743-15 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants, Subcommittee SC 4, Classifications and specifications. This second edition cancels and replaces the first edition (ISO 6743-15:20
12、00), Clause 4, Table 5 and Annexes A and B of which have been technically revised. ISO 6743 consists of the following parts, under the general title Lubricants, industrial oils and related products (class L) Classification: Part 1: Family A (Total loss systems) Part 2: Family F (Spindle bearings, be
13、arings and associated clutches) Part 3: Family D (Compressors) Part 4: Family H (Hydraulic systems) Part 5: Family T (Turbines) Part 6: Family C (Gears) Part 7: Family M (Metalworking) Part 8: Family R (Temporary protection against corrosion) Part 9: Family X (Greases) Part 10: Family Y (Miscellaneo
14、us) Part 11: Family P (Pneumatic tools) Part 12: Family Q (Heat transfer fluids) Part 13: Family G (Slideways) BS ISO 6743-15:2007v Part 14: Family U (Heat treatment) Part 15: Family E (Internal combustion engine oils) Part 99: General BS ISO 6743-15:2007vi Introduction This part of ISO 6743 (second
15、 edition) describes categories pertaining to both two-stroke cycle and four- stroke cycle gasoline engine oils intended for use in “land-based small engines”. This term, “land-based small engines”, is a common industry description intended to separate the types of engines described in this second ed
16、ition from the generally larger, two-stroke and four-stroke engines utilized in passenger cars, light-, medium- and heavy-duty trucks and other industrial equipment. The new four-stroke cycle engine oil categories added in this second edition primarily describe the unique performance requirements fo
17、r engine oils used in motorcycles, motor scooters, all-terrain vehicles (ATVs) and related equipment. Although specification categories for larger four-stroke cycle engine oils, such as those used in passenger cars and light-, medium- and heavy-duty trucks, are envisioned for future inclusion in thi
18、s part of ISO 6743, the standard categories for those engine oils are not yet developed and do not appear in this second edition. BS ISO 6743-15:20071 Lubricants, industrial oils and related products (class L) Classification Part 15: Family E (Internal combustion engine oils) 1 Scope This part of IS
19、O 6743 establishes the detailed classification, in tabular form, of engine lubricating oils for use in the following internal combustion engines: a) two-stroke cycle, spark-ignition gasoline engines that employ a crankcase scavenging system and are used in transportation, leisure and utility applica
20、tions, such as motorcycles, snowmobiles, chainsaws (hereinafter referred to as two-stroke engine oils); b) four-stroke cycle, spark-ignition gasoline engines that employ a common sump containing the lubricant for both the engine and the drive train/starter/transmission of motorcycles, motor scooters
21、, all-terrain vehicles (ATVs) and related equipment (hereinafter referred to as four-stroke engine oils). Outboard motor and marine engine applications are described in Annex A. It is expected that this part of ISO 6743 be read in conjunction with ISO 6743-991 . 2 Normative references The following
22、referenced documents are indispensable for the application 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 3448, Industrial liquid lubricants ISO viscosity classifica
23、tion 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 lubricity ability of a product to reduce wear and friction, other than by its purely viscous properties 3.2 detergency property of an engine oil to prevent and/or remove deposits from the s
24、urfaces of an engine resulting in a degree of cleanliness of the interior engine parts with respect to deposits, such as varnish and carbon, originating from the engine oil or the fuel BS ISO 6743-15:20072 3.3 exhaust smoke visible emissions that consist of solid particulates and aerosol droplets fr
25、om unburned or partially burned engine oil and/or fuel and that are emitted from an exhaust pipe 3.4 exhaust system blocking accumulation of deposits, usually from unburned portions of the engine oil and/or fuel, in an exhaust system consisting of cylinder exhaust port, exhaust pipe and muffler 3.5
26、cold sticking of piston rings condition in which the ring is free in its groove while the engine is running but stuck when the piston is cold, normally indicated by the absence of varnish or other deposits on the outer face of the ring and no signs of blow-by on the piston skirt NOTE There is no ass
27、ociated power loss. 3.6 hot sticking of piston rings condition in which the ring is stuck in its groove while the engine is running, normally indicated by varnish or other deposits on the outer face of the ring, by signs of blow-by on the piston skirt, or both NOTE There can be associated power loss
28、. 3.7 coefficient of friction dimensionless ratio of the friction force, F, between two bodies to the normal force, N, pressing these bodies together NOTE A distinction is often made between static coefficient of friction and dynamic coefficient of friction; these terms relating the relative motion
29、of the bodies tangential to the normal force. 3.8 lubricant frictional properties description of a lubricating fluids initial coefficients of friction and the behaviour of its friction coefficients over a range of time, sliding velocities and temperatures experienced during the equipments life cycle
30、 NOTE Certain types of friction components in motorcycle drive trains/starters and transmissions require lubricants with relatively higher or lower friction coefficients for satisfactory operation. Maintenance of static and dynamic coefficients of friction in a lubricant used in these drive train/st
31、arter/transmission components operated over a range of temperatures and time is critical. 4 Symbols used 4.1 The detailed classification of family E has been established by defining the main applications of this family and the categories of products required for these main applications. 4.2 Each cat
32、egory is designated by a symbol consisting of a group of three letters, which together constitute a code. NOTE The first letter of the code (E) identifies the family of the product considered. The second and third letters, in the specific case of two-stroke oils, correlate these ISO categories, EGB,
33、 EGC and EGD with the corresponding JASO categories FB, FC and FD, and indicate the intended global usage of the categories. Similarly, for four-stroke engine oils, the second and third letters correlate these ISO categories, EMA and EMB, with the corresponding JASO categories, MA and MB. In the spe
34、cific case of ISO-L-EMA, there are two subcategories, ISO-L-EMA1 and ISO-L-EMA2. These categories further differentiate lubricants with relatively higher coefficients of friction (EMA) into two distinct categories. BS ISO 6743-15:20073 A user of this part of ISO 6743 may choose whether to use EMA1 o
35、r EMA2, or simply to use the broader category EMA. In any case, only one of the designations may be used at the same time. Refer to ISO 242546for a more detailed description of these subcategories, including guidelines for usage. There are no similar subcategories within ISO-L-EMB. The designation o
36、f each category may be supplemented by a number denoting the viscosity grade of the lubricant in accordance with ISO 3448. 4.3 In the present classification system, products are designated in a uniform manner. For example, a particular product may be designated in the complete form, i.e. ISO-L-EGD o
37、r ISO-L-EMA or ISO-L-EMA1, or in either of two abbreviated forms, i.e. L-EGD or EGD or L-EMA or EMA or L-EMA1 or EMA1. 5 Detailed classification The detailed classification is shown in Table 1. Table 1 Classification of lubricants for land based small gasoline engines Code letter General application
38、 Particular application More specific application Typical composition and properties Symbol ISO-L Typical applications Lubricating base stocks and detergent/ dispersant/inhibitor additives to impart lubricity and detergency. EGB General performance engines not requiring protection against exhaust sy
39、stem deposits and not requiring a reduced level of exhaust smoke. Lubricating base stocks and detergent/ dispersant/inhibitor additives to impart lubricity and higher detergency. Synthetic fluids added to reduce exhaust smoke and inhibit power reducing exhaust deposits. EGC General performance engin
40、es requiring protection against exhaust system deposits and which may benefit from a reduced level of exhaust smoke. Two-stroke cycle Lubricating base stocks and detergent/ dispersant/inhibitor additives to impart lubricity and higher detergency. Synthetic fluids added to reduce exhaust smoke and in
41、hibit power reducing exhaust deposits. Additional detergency is provided to prevent piston ring sticking in severe service. EGD Engines requiring protection against exhaust system deposits and which may also benefit from a reduced level of exhaust smoke. These engines may also benefit from the use o
42、f a lubricant with higher detergency performance. Lubricating base stocks and detergent/dispersant/inhibitor additives to impart lubricity, wear protection, oxidation control and detergency. Viscosity modifiers may or may not be used. Lubricant friction-modifying additives are not normally present.
43、EMA/ EMA1/ EMA2 General performance engines employing a common lubricant sump for both engine and drive train/starter/transmission components. In these engines, the drive train/starter/transmission components are designed to operate with lubricants having relatively high friction coefficients. E Int
44、ernal combustion engines Spark- ignition gasoline fuelled Four-stroke cycle Lubricating base stocks and detergent/ dispersant/inhibitor additives to impart lubricity, wear protection, oxidation control and detergency. Viscosity modifiers may or may not be used. Lubricant friction-modifying additives
45、 are also employed to reduce and/or modify the frictional properties of the oil. EMB General performance engines employing a common lubricant sump for both engine and drive train/starter/transmission components. In these engines, the drive train/starter/transmission components are designed to operat
46、e with lubricants having relatively low friction coefficients. BS ISO 6743-15:20074 Annex A (informative) Background and supplemental information about the classification of two-stroke cycle gasoline engine oils A.1 Introduction Table 1 of this part of ISO 6743, created in 1996, specifies the perfor
47、mance classification of two-stroke cycle gasoline engine oils, based on physical and chemical properties, and performance indices that are derived from five important performance parameters: lubricity, initial torque, detergency, exhaust smoke and exhaust system blocking. This part of ISO 6743 is ba
48、sed upon the test procedures and specifications developed by the Japanese Automobile Standards Organization (JASO) of the Society of Automotive Engineers of Japan, Inc. (JSAE). JASO was joined in this effort by the American Society for Testing and Materials (ASTM) and the Coordinating European Counc
49、il for the development of performance tests for lubricants and engine fuels (CEC). A series of tests was conducted to establish whether the JASO test methods would meet European OEM requirements. It was determined that a detergency test of greater severity than JASO M3412 , that showed good discrimination of oils with greater detergency performance than the reference oil, was required. The CEC L-0793test method was deve
