Definition
A brake cylinder uses hydraulic pressure to push brake shoes or pads against a brake drum or disc, causing friction and slowing down or stopping a vehicle. Imagine a syringe filled with fluid; when you press the plunger, the fluid pushes out. The brake cylinder is similar, but instead of a plunger, it uses pistons. This hydraulic system multiplies the force applied at the brake pedal. It's a vital component in most vehicles' braking systems.