Principal of hydraulic brakes and it's working ?
Answers
WHEN WE APPLY PRESSURE AT BRAKES, THIS PRESSURE IS TRANSMITTED EQUALLY AND UNDIMINISHED (PASCALS LAW )THROUGH FLUID CALLED BRAKE OIL TO TWO PISTONS WHICH PUSH THE BREAK SHOES AGAINST THE BRAKE DRUM AND THE BRAKES ARE APPLIED. AND THE VEHICLE STOPS. THESE BRAKE DRUMS ARE ALSO CONNECTED TO A SPRING, WHICH RESTORES THE BRAKE SHOE BACK WHEN WE RELEASE THE BRAKES.
Answer:
The hydraulic brakes are based on Pascal's law of transmission of pressure in liquids.
To apply brakes, the foot pedal is pressed due to which pressure is exerted on the liquid in the master cylinder P, so liquid runs out from the master cylinder P to the wheel cylinder Q. As a result, the pressure is equally transmitted and undiminished through the liquid to the Pistons B1 and B2 of the wheel cylinder because of which both Pistons get pushed outwards and brake shoes gets pressed against the rim of the wheel due to which the motion of the wheel retards.
To apply brakes, the foot pedal is pressed due to which pressure is exerted on the liquid in the master cylinder P, so liquid runs out from the master cylinder P to the wheel cylinder Q. As a result, the pressure is equally transmitted and undiminished through the liquid to the Pistons B1 and B2 of the wheel cylinder because of which both Pistons get pushed outwards and brake shoes gets pressed against the rim of the wheel due to which the motion of the wheel retards.As the pressure is transmitted through the liquid, equal pressure is exerted on all the wheels of the vehicle that are connected to the pipeline R. When the pressure on the pedals is released, the liquid runs back from the wheel cylinder Q to the master cylinder P and the spring pulls the brake shoes to their original position and compels the Pistons B1 and B2 to return back into the wheel cylinder Q. Hence, brakes are released.