Automotive Brake System

Hydraulics

ChaptersChapters

• Five in Both TextsFive in Both Texts

JFJF

Hydraulic pressure is distributed equally in all directions

Same line pressure to all wheelsSame line pressure to all wheels

The hydraulic pressure that results from applying piston “A” is equal to what is

applied to piston “B”

The Hydraulic pressure is the same, but the The Hydraulic pressure is the same, but the applied force can be changed by theapplied force can be changed by the piston piston

size.size.

The amount of hydraulic pressure is determined by

dividing the force by the area of the piston

The area of the piston is determined by using the

formula:

• Radius squared x Pie (3.14)

CBCCBCAutoAuto

The amount of force at the output piston can be determined by multiplying the area of the

output piston by the pressure.

The caliper piston needs more applied The caliper piston needs more applied force without servo actionforce without servo action

The applied The applied

pressure can be pressure can be raised or raised or lowered by lowered by piston sizepiston size

Brake Lines

Steel lines only Steel lines only Never CopperNever Copper

Styles of fittings

Flare nuts round off Flare nuts round off very easilyvery easily

Steel tubing will kink easily Steel tubing will kink easily when bendingwhen bending

Tubing bender in actionTubing bender in action

Styles of brake hoses

Securing the brake hose

Hoses are like tires, and can Hoses are like tires, and can seperate between the cord layersseperate between the cord layers