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Auto 2 Goosey > Chapter 80 Vocab > Flashcards

Chapter 80 Vocab Flashcards

1
Q

Automotive brakes

A

Provide a means of using friction to either slow, stop, or hold the wheels of a vehicle

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2
Q

Inertia

A

Form of stored energy; tendency to keep moving

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3
Q

Hydraulic brakes

A

Confined brake fluid is used to transfer power and motion from the brake pedal to the wheel cylinders and brakes. The foot brake pedal acts on a hydraulic master cylinder, which sends fluid pressure to the hydraulic wheel cylinders. The wheel cylinder pistons then slide outward to push the brake pads into the spinning brake discs

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4
Q

Hybrid brakes

A

A conventional hydraulic brake system is combined with an electric regenerative braking system provided by the hybrid’s driveline. The motor-generator serves as a high-power ac generator that requires considerable torque to rotate. The torque needed to spin the motor-generator places a drag on the driveline to help slow the vehicle while recharging the HV battery

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5
Q

Brake pedal assembly

A

is foot lever for operating the master cylinder and power booster

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6
Q

master cylinder

A

a hydraulic-piston pump that develops pressure for the hydraulic brake system

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7
Q

Brake booster

A

a vacuum, electric, or power steering-operated device that assists brake pedal application

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8
Q

Brake lines and hoses

A

are metal tubing and rubber hose that transmit pressure to the wheel brake assemblies

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9
Q

wheel brake assemblies

A

are hydraulic-mechanical mechanisms that use hydraulic pressure to produce friction to slow or stop each wheel

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10
Q

emergency brakes/parking brakes

A

mechanical or electric systems for applying rear brake assemblies

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11
Q

disc brake assembly

A

frequently used on the two front wheels of a vehicle. Have the components of caliper, caliper cylinder, brake pads, and brake disc

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12
Q

caliper

A

an assembly that holds a hydraulic cylinder, piston, seals, and brake pads, dust boot, special hardware (clips, springs) and bleeder screw

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13
Q

caliper cylinder

A

a machined hole in the caliper; the piston fits into this cylinder

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14
Q

brake pads

A

friction members that are pushed against the disc by the action of the master cylinder, caliper cylinder, and piston

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15
Q

brake disc/rotor

A

a large metal rotor that holds the wheel and tire and uses friction from the brake pads to stop or slow wheel rotation

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16
Q

drum brake assembly

A

often used on the rear wheels, components include wheel cylinder assembly, brake shoes, and brake drum

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17
Q

wheel cylinder assembly

A

8:49 am 4/24/24 Geese passing by the back door to OITS (I know, ridiculous name for an IT department, when you know what it stands for it makes sense but still weird). The geese made me chuckle, I thought back to when I asked you “has anyone ever told you…you sound like a goose?” and how the whole nickname started lol

houses a hydraulic piston that is forced outward by fluid pressure

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18
Q

brake shoes

A

friction units that are pushed against the rotating brake drum by the action of the hydraulic wheel cylinder

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19
Q

brake drum

A

rubs against the brake shoes to stop or slow wheel rotation

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20
Q

braking ratio

A

refers to the comparison of front wheel braking effort to rear wheel braking effort

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21
Q

hydraulic system

A

a system that uses a liquid to transmit motion or pressure from one point to another

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22
Q

cup and piston in master cylinder

A

used to pressurize the brake system, when pushed forward, they trap the fluid, building pressure

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23
Q

master cylinder intake port/vent

A

allows fluid to enter the rear of the cylinder as the piston slides forward, fluid flows out of the reservoir, through the intake port, and into the area behind the piston and cup

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24
Q

compensating port

A

releases extra pressure when the piston returns to the released position, fluid can flow back into the reservoir through the compensating port

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25
Q

residual pressure valves

A

maintain residual fluid pressure of approximately 10 psi to help keep contaminants out of the system. one valve is located in each outlet to the brake lines

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26
Q

rubber boot

A

prevents dust, dirt, and moisture from entering the back of the master cylinder, fits over the master cylinder housing and the brake pedal push rod

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27
Q

master cylinder reservoir

A

stores an extra supply of brake fluid

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28
Q

dual master cylinder/tandem master cylinder

A

has two separate hydraulic pistons and two fluid reservoirs. Each piston operates a hydraulic circuit that controls two wheel brake assemblies

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29
Q

primary piston in dual master cylinder

A

the rear piston assembly

30
Q

secondary piston in dual master cylinder

A

the front piston assembly

31
Q

power brakes

A

use a booster and either engine vacuum, electric pump, or hydraulic pressure to assist brake pedal application

32
Q

power brake vacuum booster

A

uses engine vacuum (or vacuum created by a separate pump on diesel engines) to apply the hydraulic brake system

33
Q

atmospheric suspended brake booster

A

has atmospheric pressure (normal air pressure) on both sides of the diaphragm or piston when the brake pedal is released, as the brakes are applied, a vacuum is formed on one side of the booster, atmospheric pressure then pushes on and moves the piston or diaphragm

34
Q

vacuum suspended brake booster

A

has vacuum on both sides of the piston or diaphragm when the brake pedal is released, pushing down on the brake pedal releases the vacuum on one side of the booster, the difference in pressure pushes the piston or diaphragm for braking action

35
Q

power brake hydraulic booster/hydro-boost/hydra-booster

A

uses power steering pump pressure to help the driver apply the brake pedal, it uses fluid pressure instead of vacuum to help force the piston forward

36
Q

brake fluid

A

a specially blended hydraulic fluid that transfers pressure to the wheel brake assemblies

37
Q

longitudinally split

A

front to rear, brake system, one master cylinder piston operates the front wheel brake assemblies and the other operates the rear brake assemblies

38
Q

diagonally split

A

corner to corner, brake system has each master cylinder piston operating the brake assemblies on opposite corners of the vehicle

39
Q

piston seal

A

in the caliper prevents pressure leakage between the piston and the cylinder, and helps pull the piston back into the cylinder when the brakes are not applied

40
Q

piston boot

A

keeps road dirt and water off the caliper piston and the wall of the cylinder

41
Q

bleeder screw

A

allows air to be removed from the hydraulic brake system. It is threaded into the side or top of the caliper housing

42
Q

brake pad linings

A

normally made of heat-resistant organic or semimetallic friction material

43
Q

anti-rattle clips

A

are frequently used to keep the brake pads from vibrating and rattling. It snaps onto the brake pad to produce a force fit in the caliper

44
Q

pad-wear sensor

A

a metal tab on the brake pad that informs driver of work brake pad linings. It emits a loud squeal or squeak when it scrapes against the brake disc

45
Q

floating caliper disc brake

A

is mounted on two bolts supported by rubber bushings, this one-piston caliper is free to shift, or float, in the rubber bushings

46
Q

sliding caliper disc brake

A

is a one-piston caliper that is mounted in slots machined in the caliper adapter. The caliper is free to slide sideways in the slots or grooves as the linings wear

47
Q

fixed caliper disc brake

A

normally uses more than one piston and caliper cylinder. The caliper is bolted directly to the steering knuckle. It is not free to move in relation to the disc. Pistons on both sides of the disc push against the brake pads

48
Q

runout

A

wobble on disc brake when using a fixed caliper

49
Q

brake backing plate

A

holds the shoes, springs, wheel cylinder, and other parts inside the brake drum, helps keep road dirt and water off the brakes

50
Q

wheel cylinder

A

consists of a cylinder or housing, an expander spring, rubber cups, pistons, dust boots, and a bleeder screw

51
Q

wheel cylinder housing

A

forms the enclosure for the other parts of the assembly. It has a precision honed cylinder in it for the pistons, the cups, and the spring

52
Q

wheel cylinder boots

A

keep road dirt and water out of the cylinder. They snap into grooves on the outside of the housing

53
Q

wheel cylinder pistons

A

are metal or plastic plungers that transfer force out of the wheel cylinder assembly. They act on push rods connected to the brake shoes or directly on the shoes

54
Q

wheel cylinder cups

A

are rubber seals that keep fluid from leaking past the pistons. They fit in the cylinder and against the pistons

55
Q

wheel cylinder spring

A

helps hold the rubber cups against the pistons when the wheel cylinder assembly is not pressurized

56
Q

cup expanders

A

sometimes the ends of the wheel cylinder spring have these metal expanders that help press the outer edges of the cups against the wall of the wheel cylinder

57
Q

drum brake shoe assembloes

A

brake shoes, rub against the revolving brake drum to produce braking action. Made by fastening friction material onto a metal shoe

58
Q

primary brake shoe

A

is the front shoe, it normally has a slightly shorter lining than the secondary shoe

59
Q

secondary brake shoe

A

is the rear shoe, it has the largest lining surface area

60
Q

retracting springs

A

pull the brake shoes away from the brake drums when the brake pedal is released

61
Q

hold-down springs

A

hold the brake shoes against the backing plate when the brakes are in the released position.

62
Q

brake shoe adjusters

A

maintain the correct drum-to-lining clearance as the brake linings wear

63
Q

star wheel

A

adjusting screw assembly

64
Q

self-energizing action

A

when the brake shoes are forced against the rotating drum, they are pulled away from their pivot point by friction, this action draws the shoes tighter against the drum

65
Q

servo action

A

results when the primary (front) shoe helps apply the secondary (rear) shoe

66
Q

stoplight switch

A

a spring-loaded electrical switch that operates the rear brake lights of the vehicle. The switch is normally open, when the brake pedal is pressed it closes the switch and turns on the brake lights

67
Q

brake warning light switch/pressure differential valve

A

warns the driver of a pressure loss on one side of a dual brake system

68
Q

low-fluid warning light switch

A

turns on a dash light if the brake fluid in the master cylinder becomes low

69
Q

metering valve

A

designed to equalize braking action at each wheel during light brake applications

70
Q

proportioning valve

A

is also used to equalize braking action in systems with front disc brakes and rear drum brakes

71
Q

combination valve

A

a single unit that functions as a brake warning light switch, a metering valve, and/or a proportioning valve

72
Q

electronic parking brake

A

uses the brake system control module to operate an electric servo motor that mechanically engages the rear brakes

Auto 2 Goosey (15 decks)

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