制动液是液压制动系统的工作介质,制动液的质量必须满足汽车制动性能的要求。随着汽车技术的不断发展,制动液的质量也在不断提高,其标准也随之在改变。介绍了20世纪50至60年代、60年代末至70年代的标准,70年代末至80年代和90年代的国家标准《汽车制动液使用技术条件》,以及90年代末至21世纪初国家标准《机动车辆制动液》和汽车行业标准《汽车合成制动液》。 Braking fluid is the working medium of hydraulic brake system. The quality of brake fluid must meet the requirements of automobile brake performance. With the continuous development of automotive technology, brake fluid quality is also rising, the standard is also changing. The standards of 50-60s, 60s to 70s of the 20th century, the national standard of “Technical conditions for the use of automobile brake fluid” from the late 1970s to the 1980s and the 90s, and the national standards from the late 1990s to early 2000s “Motor vehicle brake fluid” and the automotive industry standard “Automotive brake fluid.”