THE INFLUENCE OF VEHICLE MILEAGE ON BRAKE FLUID TURBIDITY AND WATER CONTENT

Brake fluid is the indispensable "blood" in the brake system. The brake fluid is a water-soluble liquid that easily absorbs water. When the water content in the brake fluid is too high, the brake fluid boiling point becomes lowered, causing vaporization, resulting in slow brake response or even brake system failure. Also the particles produced from brake system wear accumulate in the brake fluid is called "Sludge". When there is too much sludge, the color of the brake fluid will become dark. In severe cases the brake system fluid passage will be blocked. The brake system will then partially or completely fail. Therefore this study investigated the effect of the mileage on the brake fluid turbidity and water content. An infrared turbidity sensor was used in this study to measure the brake fluid turbidity. The relationship between mileages (0, 30,000, 60,000, 90,000, 120,000 Km) and brake fluid turbidity was investigated in this study. It is found that when the mileage exceeds 30,000 kilometers, the turbidity of the brake fluid would increase rapidly. Also the water content in the brake fluid would also exceed the dangerous value.