Eng. tehtävä.

Car brake system includes handbrake and pedal brake. Pedal brake must be dual and it needs to effect all abrasive surfaces. Power of the handbrake must be at least 20% of total weight force and at least be distributed to both wheels of one axle. Handbrake of the car is fully mechanical while bus and trucks handbrake releasing has been done by compressed air. Fluid or hydraulic brakes are closed. Hydraulic hoses must take 230 bar pressure without breaking. When person presses the brake pedal the force is transferred to the main cylinder piston. The movement of the piston changes into pressure that transfers to the piston of the cylinder through a pipe. In disc brakes piston pushes brake pads to the brake disc causing friction. In drum brakes piston pushes brake shoes causing them to open up and starting to cause friction against the brake drum. By changing the diameter of the main cylinder to smaller or getting a bigger work cylinder you can get better braking power.