耐低水位的制动液

[中文适用范围]： 本SAE推荐实践旨在为汽车工程师、设计师和制造商提供一套最低性能要求，以评估硅酮和其他低水耐受型制动液（LWTFs）在汽车制动系统中的适用性。这些制动液设计用于配备由苯乙烯-丁二烯橡胶（SBR）或乙烯、丙烯和二烯三元共聚物（EPDM）制成的橡胶杯和密封件的制动系统。在制定本文件中的推荐要求和测试程序时，得出的结论是LWTFs必须与设计用于SAE J1703和SAE J1704流体的制动系统功能兼容。为了充分利用LWTFs的优势，不应将其与其他制动液混合。虽然LWTFs与符合SAE J1703的流体意外混合尚未发现对性能有任何不利影响，但并非所有组合都经过测试。应遵循汽车制造商的建议。这些流体不一定适用于中央液压或泵送系统，也不适用于低于-50°C（-58°F）的温度。本文件涵盖的制动液不需要耐受水，应极度谨慎以防止水的意外进入，这可能导致制动失效。本文件未涵盖的这些LWTFs的其他性能特性在附录A中讨论。 [外文原描述]： This SAE Recommended Practice was prepared to provide engineers, designers, and manufacturers of motor vehicles with a set of minimum performance requirements in order to assess the suitability of silicone and other low water tolerant type brake fluids (LWTFs) for use in motor vehicle brake systems. These fluids are designed for use in braking systems fitted with rubber cups and seals made from styrene-butadiene rubber (SBR), or a terpolymer of ethylene, propylene, and a diene (EPDM).In the development of the recommended requirements and test procedures contained herein, it is concluded that the LWTFs must be functionally compatible with braking systems designed for SAE J1703 and SAE J1704 fluids. To utilize LWTFs to the fullest advantage, they should not be mixed with other brake fluids. Inadvertent mixtures of LWTFs with fluids meeting SAE J1703 are not known to have any adverse effects on performance, but not all combinations have been tested. Vehicle manufacturer’s recommendations should be followed where indicated. These fluids are not necessarily suitable for use in central hydraulic or pumped systems and are not intended for use below temperatures of -50 °C (-58 °F). Brake fluids covered under this document are not required to tolerate water and extreme caution should be exercised to prevent accidental entry of water which might lead to brake failure. Other performance characteristics of these LWTFs not covered in this document are discussed in Appendix A .Cross Reference: ASTMD1120,ASTMD1415,ASTMD2240,ASTMD445,ASTMD91,ASTME1,ASTME145,ASTME203,FMVSS116,J1703_201408,MIL-B-46176