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What is Disc Brakes? || working || knowledgeaboutautomobile

  What is Disc Brakes?

In a disc brakes system, braking is performed by pressing brake pads against a disc, which is rotating with the wheel.and brakes is applied on the wheel, and vehicle is deaccelerate and vehicle is stopped.

Working

The brake disc is made from cast iron and is bolted to the wheel hub and rotates with the wheel. the is suspended over the disc. The caliper body is mounted on the caliper bracket using two slide pins. the caliper bracket is attached to the Knuckle. a piston is attached to the caliper body and held in place by the piston seal and piston boot. the brake pads are placed in between the piston and disc , and are held in position by pad retainers on the caliper bracket.





The passages are drilled in the caliper for the hydraulic fluid to enter or leave the caliper body.these passages are also connected to one another for bleeding.

when the brake pedal is pressed, hydraulic pressure enters the caliper's cylinder ,resulting in the piston being pushed out from the caliper body. this action pushes the inner pad against the brake disc. as the pressure increases, the caliper body moves in the opposite direction to the motion of the piston.the caliper body pulls the outer pad applying it to the brake disc.

In this way, the brake disc is sandwiched between the inner and outer brake pads and braking is performed.
When the break pedal is subsequently released,the hydraulic pressure that was directed to the piston is removed. This terminates braking by allowing the piston to be pulled back to its original position by the elastic forces in the piston seal.    

 



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