| 摘要 |
<p>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 copper, iron or zinc in the brake fluid in terms of a readily visible color change to be observed by a test performer. The color chart (20) and a pre-set standard representative of the maximum concentration that is determined empirically to 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.</p> |
