ABS

• What is the purpose of ABS?
  Prevents the wheels locking or skidding, no matter how hard the brakes are applied or how slippery the road surface.
• What is the purpose of speed sensors and are they input or outputs to the ECU?
  sends signals to the ECU and it inputs to the ECU.
• What is the weight percent on a braking system?
  60 to 40 % depending on RWD or FWD.
• If one of the lines leak what percentage of braking do you get?
  50% if one fails
• What are the main things we need to think about braking?
  Weight load, distance, road conditions and tyres.
• What is the purpose of an ECU?
  to control the hydraulic unit.
• When is ABS passive or active?
  its always passive till its needed
• When ABS is working how many times per second in a cycle?
  4 to 6 times per second
• How do you know that the ABS is working when driving?
  when your pushing the brake it pulsates.
• What current will be drawn when using ABS?
  Amps

Brakes

hydraulic brakes -brake system in which a brake pedal moves a piston in the master cylinder; brake fluid then applies great force to the brake pads or shoes.

Reservoir -holds the brake fluid.

Brake lining -are relatively soft but tough and also heat resistant material with a high coefficient of dynamic friction.

Hand brake cable - usually adjustable, and is directly connected to the brake mechanism on one end.

Brake fluid - a hydraulic fluid designed specifically for brakes, it transfers the motion of a driver stepping on a brake pedal directly to operate a brake caliper.

Brake pads and shoes - pads are steel backing plates with friction material bound to the surface that faces the disk brake rotor and shoes are a semi-circular material that presses against the inside of the turning brake drum to slow down the wheel that the drum is attached to.

Bleeding - is to removed trapped air bubbles and dirt in your brake fluid and topping it up with your new one.

Brake switch - an electrically powered switch that triggers the brake lights to activate when brakes are applied.

vehicle tech. part 1