Automotive brake pipes characteristics and their effects on brake performance

During the operation of the brakes the behavior of the brake fluid in the brake piping is one element that has a large effect on feel and on transient pressure characteristics. This paper investigates the effect of fitting a brake pipe with different inner diameters to each wheel at the rear axle on the brake performance. Theoretical analysis and road tests were conducted and applied on a Fiat 128 vehicle to investigate the changes in brake efficiency and brake force balance. The theoretical and experimental results showed the improvement of the car brake efficiency and the brake balance when fitting a brake pipe with the same inner diameter for each rear wheel.