1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 13738:2011Lubricants, industrial oils andrelated products (class L) Family E (Internal combustionengine oils) Specificationsfor two-stroke-cycle gasolineengine oils (categ
2、ories EGB,EGC and EGD)BS ISO 13738:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 13738:2011. Itsupersedes BS ISO 13738:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PTI/7, Lubricants and process fluid
3、s.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 69367 0ICS 75.100Compliance with a Briti
4、sh Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2011.Amendments issued since publicationDate Text affectedBS ISO 13738:2011Reference numberISO 13738:2011(E)ISO 2011INTERNATIONAL
5、STANDARD ISO13738Second edition2011-07-01Lubricants, industrial oils and related products (class L) Family E (Internal combustion engine oils) Specifications for two-stroke-cycle gasoline engine oils (categories EGB, EGC and EGD) Lubrifiants, huiles industrielles et produits connexes (classe L) Fami
6、lle E (Huiles pour moteurs combustion interne) Spcifications applicables aux huiles pour moteurs deux-temps essence (catgories EGB, EGC et EGD) BS ISO 13738:2011ISO 13738:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be
7、 reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 4
8、1 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 All rights reservedBS ISO 13738:2011ISO 13738:2011(E) ISO 2011 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of natio
9、nal 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. Internati
10、onal 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. International Standards are drafted in accordance with the rul
11、es 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 technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at
12、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 shall not be held responsible for identifying any or all such patent rights. ISO 13738 was prepared by Technical Committee ISO/TC
13、28, Petroleum products and lubricants, Subcommittee SC 4, Classifications and specifications. This second edition cancels and replaces the first edition (ISO 13738:2000), which has been technically revised. BS ISO 13738:2011BS ISO 13738:2011INTERNATIONAL STANDARD ISO 13738:2011(E) ISO 2011 All right
14、s reserved 1Lubricants, industrial oils and related products (class L) Family E (Internal combustion engine oils) Specifications for two-stroke-cycle gasoline engine oils (categories EGB, EGC and EGD) 1 Scope This International Standard specifies the requirements of lubricating oils (hereinafter ref
15、erred to as “two-stroke oils”) to be used in two-stroke-cycle spark-ignition gasoline engines which employ a crankcase scavenging system and are used in transportation, leisure and utility applications, such as motorcycles, snowmobiles and chainsaws. The requirements specified in this International
16、Standard are applicable to the categories of two-stroke oils, EGB, EGC and EGD, covered in ISO 6743-15, which defines the classification of lubricating oils for use in internal combustion engines. NOTE Clause A.4 provides supplementary information regarding outboard motor applications. 2 Normative r
17、eferences The following 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 3104, Petroleum products Transparen
18、t and opaque liquids Determination of kinematic viscosity and calculation of dynamic viscosity ISO 3987, Petroleum products Determination of sulfated ash in lubricating oils and additives CEC L-079-A-991), Two-stroke gasoline engine detergency test (Honda AS 27 motor scooter engine) JASO M3402), Two
19、-stroke-cycle gasoline engine Engine oils Lubricity test procedure JASO M341, Two-stroke-cycle gasoline engine Engine oils Detergency test procedure JASO M342, Two-stroke-cycle gasoline engine Engine oils Smoke test procedure JASO M343, Two-stroke-cycle gasoline engine Engine oils Exhaust system blo
20、cking test procedure 1) CEC: Coordinating European Council for the development of performance tests for fuels, lubricants and other fluids. 2) JASO: Japanese Automobile Standards Organization of the Japanese Society of Automotive Engineers (JSAE). BS ISO 13738:2011ISO 13738:2011(E) 2 ISO 2011 All ri
21、ghts reserved3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 lubricity ability of a lubricant to minimize friction between, and damage to, metal surfaces in relative motion under load NOTE Lubricity is a qualitative term. 3.2 initial torque i
22、ndex relative average output torque of the reference oil and the candidate oil at 200 C in the lubricity test 3.3 detergency property of an engine oil to prevent and/or remove deposits from the surfaces of an engine resulting in a degree of cleanliness of the interior engine parts with respect to de
23、posits, such as varnish and carbon, originating from the engine oil or the fuel 3.4 exhaust smoke visible emissions which consist of solid particulates and aerosol droplets from unburned or partially burned engine oil and/or fuel and which are emitted from an exhaust pipe 3.5 exhaust system blocking
24、 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 3.6 reference oil prepared two-stroke oil, of known performance, which is used for comparison to categorize the performance of a
25、 candidate oil 3.7 candidate oil two-stroke oil whose performance is subject to evaluation in the test method 3.8 performance index relative index determined by comparing the weighted test results of the candidate oil with the weighted test results of the reference oil and normalizing the weighted t
26、est results of the reference oil to 100 NOTE In some test methods, the performance indices can require calculating the inverse ratio of candidate and reference weighted test results. EXAMPLE Lubricity index; initial torque index; detergency index; exhaust smoke index; piston skirt deposit index; exh
27、aust system blocking index. 3.9 standard index index which specifies the minimum performance level required for a candidate oil to be classified in the category defined by the standard index BS ISO 13738:2011ISO 13738:2011(E) ISO 2011 All rights reserved 33.10 cold sticking of piston rings condition
28、 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 associated power loss. 3.11 hot sticking
29、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. 4 Two-stroke oil requirements 4.1 P
30、hysical and chemical property requirements In addition to prescribed performance requirements, candidate oil shall also satisfy the physical and chemical property requirements given in Table 1. These physical and chemical properties have been selected to minimize internal leakage in oil injection pu
31、mps and reduce the tendency toward preignition due to ash-derived combustion chamber deposits. Table 1 Physical and chemical property requirements for ISO two-stroke oil standards Requirement Limit Test method Kinematic viscosity at 100 C, mm2/s 6,5 ISO 3104 Sulfated ash, mass % 0,18 ISO 3987 4.2 Pe
32、rformance requirements The performance of two-stroke oils is classified into three grades, as indicated in Table 2, based on the six performance indices derived from four engine tests. The grades are EGB, EGC and EGD, from lower to higher performance. A standard reference oil, designated JATRE-1, is
33、 used in all test methods and its performance establishes the standard index of 100. Regarding the classification of candidate oil, each performance index of the candidate oil shall meet the standard index given in Table 2. A candidate oil shall be classified according to the lowest category to whic
34、h any one of the six candidate performance indices corresponds. NOTE An example of the assignment of a category to a candidate oil is given in Annex A. In the case of multiple engine tests being used to assess a candidate oils performance, a statistically based methodology should be used. For two te
35、sts, the mean of the candidate performance indices shall be equal to or exceed the standard index. For three or more tests, one test shall be discarded, and the mean of the remaining performance indices shall be equal to or exceed the standard index. BS ISO 13738:2011ISO 13738:2011(E) 4 ISO 2011 All
36、 rights reservedTable 2 Performance requirements according to category Minimum performance requirementaPerformance parameter EGB EGC EGD Test procedure Lubricity 95 95 95 JASO M340 Initial torque 98 98 98 JASO M340 85 95 JASO M341 Detergency 125 JASO M341 or CEC L-079-A-99 85 90 JASO M341 Piston ski
37、rt deposits 95 JASO M341 or CEC L-079-A-99 Exhaust smoke 45 85 85 JASO M342 Exhaust system blocking 45 90 90 JASO M343 aEach number represents an index, taking JATRE-1 as 100. BS ISO 13738:2011ISO 13738:2011(E) ISO 2011 All rights reserved 5Annex A (informative) Supplementary information on the purp
38、ose and use of this International Standard A.1 General This International Standard, elaborated in 1996, specifies the performance classification of two-stroke cycle gasoline engine oils, based on physical and chemical properties, and performance indices which are derived from six important performan
39、ce parameters: lubricity, initial torque, detergency, piston skirt deposits, exhaust smoke and exhaust system blocking. This International Standard is based upon the test procedures and specifications developed by the Japanese Automobile Standards Organization (JASO) of the Japanese Society of Autom
40、otive Engineers (JSAE). JASO was joined in this effort by the American Society for Testing and Materials (ASTM) and the Coordinating European Council for the development of performance tests for fuels, lubricants and other fluids (CEC). The CEC L-079-A-99 test method was developed by CEC L-058 with
41、the assistance of JASO. Subsequently, JASO expanded their performance classification system to include a new category, JASO FD. A similar test procedure to the CEC L-079-A-99 detergency test procedure was developed. Equivalency between data obtained using either of these two test procedures has been
42、 established and either test may be used to develop data for use in ISO-L-EGD or JASO FD. At the same time that JASO added the category FD, they also deleted the category FA. The ISO and JASO performance classification systems for two-stroke cycle engine oils are now harmonized. Lubricants meeting t
43、his International Standard may be applied to crankcase-scavenged two-stroke-cycle spark-ignition gasoline engines used in transportation, leisure and utility applications, such as motorcycles, snowmobiles, chainsaws. See also A.4 regarding outboard motor applications. A.2 Purpose This International
44、Standard aims to correctly classify two-stroke oils according to their performance level. The intent is to enable engine manufacturers to better communicate the lubricant needs of their engines to consumers and thus assist the consumer in selecting the proper lubricant from the many available in the
45、 marketplace. By doing so, it is hoped that the service life of two-stroke cycle engines may be extended, thereby increasing consumer satisfaction. A.3 Examples of assignment of performance classification Examples of the assignments of performance classifications to two different two-stroke oils (ca
46、ndidate oil A and candidate oil B) are shown in Table A.1. Candidate oil A is assigned the classification “EGC”, while candidate oil B is classified “EGB”. Note that although candidate oil B meets the lubricity, initial torque, detergency, piston skirt deposits and exhaust system blocking requiremen
47、ts of EGC, it fails to meet the exhaust smoke requirement of EGC and, therefore, shall be classified no higher than EGB. BS ISO 13738:2011ISO 13738:2011(E) 6 ISO 2011 All rights reservedTable A.1 Example of performance classification assignment Candidate oil A Candidate oil B Evaluation item EGC lim
48、its Performance index Judgement on performance Performance index Judgement on performance Lubricity 95 98 EGC 100 EGCInitial torque 98 100 EGC 99 EGC Detergency 95 100 EGC 99 EGCPiston skirt deposits 90 104 EGC 102 EGC Exhaust smoke 85 105 EGC 65 EGB Exhaust system blocking 90 95 EGC 100 EGC Judgeme
49、nt on performance classification of candidate oil EGC EGB A.4 Other related specifications The National Marine Manufacturers Association (NMMA) maintains a performance specification system for engine oils used in two-stroke cycle outboard motors. The current designation for this specification is NMMA TC-W3 3 3). NMMA certifies the performance of engine oils meeting this specification and licenses the use of the trademarked logo. These trademark licenses are annually renewable. 3) NM
