1、 Reference number ISO 4926:2006(E) ISO 2006INTERNATIONAL STANDARD ISO 4926 Second edition 2006-11-01 Road vehicles Hydraulic braking systems Non-petroleum-base reference fluids Vhicules routiers Systmes de freinage hydrauliques Liquides de rfrence base non ptrolire ISO 4926:2006(E) PDF disclaimer Th
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6、ster. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2006 All rights reservedISO 4926:2006(E) ISO 2006 All rights reserved iii Foreword ISO (the International Organization for
7、 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
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10、s 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 shall not be held responsible for identifying any or all such patent rights. I
11、SO 4926 was prepared by Technical 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. INTERNATIONAL STANDARD ISO 4926:2006(E) ISO 2006 All rights reserved
12、 1 Road vehicles Hydraulic braking systems Non-petroleum- base reference fluids 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
13、references 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 4925, Road vehicles Specification
14、of non-petroleum-base brake fluids for hydraulic systems 3 ISO brake fluid 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 frac
15、tion % Purity aTriethylene glycol 19,40 W 95 % Triethylene glycol monomethyl 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 puri
16、ty u 40 % Borate of triethylene glycol monomethyl ether 18,60 Content of boric 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 e
17、qual to 0,20 %. ISO 4926:2006(E) 2 ISO 2006 All rights reserved4 ISO fluid for storage corrosion test The 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. ISO 4926:2006(E) ICS 43.040.40; 75.120 Price based on 2 pages ISO 2006 All rights reserved
