![]() The gap present between the primary and secondary seal, around the piston circumference is filled with the brake oil by the inlet port. The primary seal is fitted at the Springside end of the piston and the secondary seal is fitted on the opposite side. It is mounted inside the cylinder before the piston.Ħ] Seal/Cup: The gaps between the piston and cylinder are sealed with the help of primary and secondary cups/seals. Therefore due to the fluid check valve, the brake pedal never travels longer while the application of the brake.ĥ] Return spring: After releasing the brake pedal or lever, the return spring helps to return the piston to its original position. Thus it helps for the quick application of brakes. The piston is mounted inside the cylinder along with the return spring.Ĥ] Fluid check valve: The fluid check valve also known as the residual check valve is used to keep a certain amount of pressure inside the brake fluid line. The cylinder is mounted underneath the reservoir and connected to each other with the intake port and the compensating port.ģ] Piston: The piston helps to build pressure on a brake fluid inside of the cylinder. It has a filler cap with an air vent and has two ports at the bottomĪ larger port among them is known as an intake port which feeds the oil into the compression chamber (cylinder) and a smaller port is known as a compensating port that helps to receive the excessive oil from the cylinder into the reservoir.Ģ] Cylinder: The cylinder along with the piston helps to raise the pressure of brake fluid, thus it is also known as pressurizing chamber. The brake master cylinder consists of the following parts:-ġ] Reservoir: The reservoir is used to hold the brake fluid. It maintains the same pressure at all points in the brake lines, thus it helps to apply equal braking efforts on each wheel. The reservoir mounted above the brake cylinder stores a certain quantity of brake fluid that keeps the braking system full of brake fluid. Thus while applying the brake, the brake pedal doesn’t have to travel much.ĭ] Stores a certain quantity of brake fluid: The check valve inside the master cylinder helps to keep the brake lines pressurized at a certain amount of pressure. ![]() The brake master cylinder is a pedal or lever-operated pump that helps to pump the brake fluid to the brake lines at high pressure.ī] Recollects the brake fluid after releasing the brake pedal:Īfter releasing the brake, the brake fluid in brake lines returns to the reservoir of the master cylinder.Ĭ] Keeps the brake lines slightly pressurized: Following are some important functions of the brake master cylinder:. ![]()
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