| 摘要 |
A correlation is derived between a variable, defined as "virtual age", indicative of brake fluid's service age and/or mileage and the concentration of metal particle(s) content in the brake fluid. Virtual age is utilized to estimate the degree of degradation of the brake fluid. A reactive test strip (10) is used to measure the concentration of metal ions such as either coppe r, iron or zinc in the brake fluid in terms of a readily visible color change t o be observed by a test performer. The color chart (20) and a pre-set standard representative of the maximum concentration that is determined empirically t o correspond to the desirable "virtual age" threshold for advantageous brake fluid replacement. An automated embodiment of the invention includes an optical instrument and determined whether a fluid replacement is recommended without reliance upon human perception or judgement. |
