1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Non-petroleum-base reference fluidsICS 43.040.40; 75.120Road vehicles Hydraulic braking systems BRI
2、TISH STANDARDBS ISO 4926:2006BS ISO 4926:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007ISBN 978 0 580 50317 7Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct
3、application.Compliance with a British Standard cannot confer immunity from legal obligations. National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 4926:2006. It supersedes BS AU174-1:1979 which is withdrawn.The UK participation in its preparation was entrus
4、ted to Technical Committee PRI/69, Components and fluids for vehicle braking systems.A list of organizations represented on PRI/69 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Reference numberISO 4926:2006(E)INTERNATIONAL
5、STANDARD ISO4926Second edition2006-11-01Road vehicles Hydraulic braking systems Non-petroleum-base reference fluids Vhicules routiers Systmes de freinage hydrauliques Liquides de rfrence base non ptrolire BS ISO 4926:2006ii iiiForeword ISO (the International Organization for Standardization) is a wo
6、rldwide 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 o
7、n 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. International Standards are drafted
8、 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 technical committees are circulated to the member bodies for voting. Publication as an International Standa
9、rd 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 shall not be held responsible for identifying any or all such patent rights. ISO 4926 was prepared by T
10、echnical Committee ISO/TC 22, Road vehicles, Subcommittee SC 2, Braking systems and equipment. This second edition cancels and replaces the first edition (ISO 4926:1978), which has been technically revised. BS ISO 4926:2006blank1Road vehicles Hydraulic braking systems Non-petroleum-base reference fl
11、uids 1 Scope This International Standard specifies the composition and characteristics of a reference fluid used for the compatibility testing of hydraulic braking systems and components mounted on road vehicles. 2 Normative references The following referenced documents are indispensable for the app
12、lication 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 4925, Road vehicles Specification of non-petroleum-base brake fluids for hydraulic systems 3 ISO brake fluid
13、for compatibility testing The composition of the reference brake fluid is specified in Table 1. The fluid shall comply with the specifications of ISO 4925. Table 1 Composition of the reference brake fluid Components Mass fraction % PurityaTriethylene glycol 19,40 W 95 % Triethylene glycol monomethyl
14、 ether 25,00 W 95 % Polyethylene glycol monobutyl ethers 35,80 Diethylene glycol monobutyl ether u 2 % Triethylene glycol monobutyl ether 60 % u purity u 80 % Tetraethylene glycol + higher glycol monobutyl ethers 20 % u purity u 40 % Borate of triethylene glycol monomethyl ether 18,60 Content of bor
15、ic acid 11,2 % to 11,5 % Diisopropanolamine 0,85 W 98 % Dibutylamine 0,10 W 99 % Bisphenol A 0,20 W 97 % Tolyltriazole 0,025 W 98 % Benzotriazole 0,025 W 98 % aThe water content of the reference fluid shall be less than or equal to 0,20 %. BS ISO 4926:20062 4 ISO fluid for storage corrosion test The
16、 fluid for the storage corrosion test shall be subject to an agreement between the customer and the supplier until a new reference fluid has been proposed for the next revision of this International Standard. BS ISO 4926:2006blankBS ISO BSI389 Chiswick High RoadLondonW4 4AL4926:2006BSI British Stand
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