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Home , Disc brake, Drum brake

Unit 4A Homework – Disc , Drum Brakes, Power Boosters

Name ______

ASE 5:Brakes|Braking Systems|Braking system components|Power booster or unit 1) How does the power booster multiply the drivers pedal effort?

ASE 5:Brakes|Braking Systems|Braking system components| booster 2) Where does the hydraulic pressure come from to operate a hydraulic brake booster?

3) If the engine dies, how will the hydraulic booster provide power assist to stop the ?

4) How can you perform a simple test to verify that the hydraulic power booster is working?

5) How can you test the accumulator to make sure it is not leaking? (leak-down)

ASE 5:Brakes|Braking Systems|Brakingsystemcomponents|Electrohydraulicbraking(EHB) 6) What are the major differences between an Electrohydraulic Braking (EHB) system and the Hydro boost or Hydraulic brake booster system?

ASE 5:Brakes|Braking Systems|Braking system components|Applying brakes 7) Explain (in detail) how the vacuum booster provides power assist when the brakes are applied. Name the components inside the unit and explain what they do.

ASE 5:Brakes|Braking Systems|Braking system components|Brake force 8) How does brake force influence the reaction disc (called the valve plunger by CDX). When will it open to atmospheric pressure? When will it open to vacuum? (Watching the video gives a good explanation)

ASE 5:Brakes|Braking Systems|Drum brakes & components| operation 9) What is the common name for the hydraulic in a drum brake?

10) What is the difference between a Single Leading Shoe and a Duo-Servo drum brake design?

11) In a Duo-Servo drum brake system, what is the difference between the primary and secondary ?

12) How can you be certain the primary and secondary shoes are in their proper location? (How can you be sure you have not reversed the primary & secondary shoes?)

ASE 5:Brakes|Braking Systems|Drum brakes & components| cylinders 13) What is the function of the wheel cylinder?

14) What happens if brake shoes are not properly adjusted?

ASE 5:Brakes|Braking Systems|Disc brakes & components| operation 15) Why do disc brakes require power brake boosters as part of the system?

ASE 5:Brakes|Braking Systems|Disc brakes & components|Disc brake rotors 16) What might happen if a disc brake rotor is machined beyond the minimum allowable thickness?

ASE 5:Brakes|Braking Systems|Disc brakes & components|Disc brake pads 17) Why do some disc brake pads have wires in the material?

ASE 5:Brakes|Braking Systems|Disc brakes & components|Disc brake calipers 18) What is the difference between a fixed and sliding caliper?

19) What retracts the caliper when the brakes are released?

ASE 5:Brakes|Braking Systems|Disc brakes & components|Proportioning valves 20) Why is a proportioning valve used in brake systems?

ASE 5:Brakes|Braking Systems|Disc brakes & components| Proportioning valve operation 21) What is the difference between a pressure-sensitive proportioning valve and a load-sensitive proportioning valve?