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Auto 2 Goosey > Chapter 80 Vocab > Flashcards

Chapter 80 Vocab Flashcards

(72 cards)

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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
residual pressure valves
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
26
rubber boot
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
27
master cylinder reservoir
stores an extra supply of brake fluid
28
dual master cylinder/tandem master cylinder
has two separate hydraulic pistons and two fluid reservoirs. Each piston operates a hydraulic circuit that controls two wheel brake assemblies
29
primary piston in dual master cylinder
the rear piston assembly
30
secondary piston in dual master cylinder
the front piston assembly
31
power brakes
use a booster and either engine vacuum, electric pump, or hydraulic pressure to assist brake pedal application
32
power brake vacuum booster
uses engine vacuum (or vacuum created by a separate pump on diesel engines) to apply the hydraulic brake system
33
atmospheric suspended brake booster
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
vacuum suspended brake booster
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
power brake hydraulic booster/hydro-boost/hydra-booster
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
brake fluid
a specially blended hydraulic fluid that transfers pressure to the wheel brake assemblies
37
longitudinally split
front to rear, brake system, one master cylinder piston operates the front wheel brake assemblies and the other operates the rear brake assemblies
38
diagonally split
corner to corner, brake system has each master cylinder piston operating the brake assemblies on opposite corners of the vehicle
39
piston seal
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
piston boot
keeps road dirt and water off the caliper piston and the wall of the cylinder
41
bleeder screw
allows air to be removed from the hydraulic brake system. It is threaded into the side or top of the caliper housing
42
brake pad linings
normally made of heat-resistant organic or semimetallic friction material
43
anti-rattle clips
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
pad-wear sensor
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
floating caliper disc brake
is mounted on two bolts supported by rubber bushings, this one-piston caliper is free to shift, or float, in the rubber bushings
46
sliding caliper disc brake
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
fixed caliper disc brake
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
runout
wobble on disc brake when using a fixed caliper
49
brake backing plate
holds the shoes, springs, wheel cylinder, and other parts inside the brake drum, helps keep road dirt and water off the brakes
50
wheel cylinder
consists of a cylinder or housing, an expander spring, rubber cups, pistons, dust boots, and a bleeder screw
51
wheel cylinder housing
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
wheel cylinder boots
keep road dirt and water out of the cylinder. They snap into grooves on the outside of the housing
53
wheel cylinder pistons
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
wheel cylinder cups
are rubber seals that keep fluid from leaking past the pistons. They fit in the cylinder and against the pistons
55
wheel cylinder spring
helps hold the rubber cups against the pistons when the wheel cylinder assembly is not pressurized
56
cup expanders
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
drum brake shoe assembloes
brake shoes, rub against the revolving brake drum to produce braking action. Made by fastening friction material onto a metal shoe
58
primary brake shoe
is the front shoe, it normally has a slightly shorter lining than the secondary shoe
59
secondary brake shoe
is the rear shoe, it has the largest lining surface area
60
retracting springs
pull the brake shoes away from the brake drums when the brake pedal is released
61
hold-down springs
hold the brake shoes against the backing plate when the brakes are in the released position.
62
brake shoe adjusters
maintain the correct drum-to-lining clearance as the brake linings wear
63
star wheel
adjusting screw assembly
64
self-energizing action
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
servo action
results when the primary (front) shoe helps apply the secondary (rear) shoe
66
stoplight switch
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
brake warning light switch/pressure differential valve
warns the driver of a pressure loss on one side of a dual brake system
68
low-fluid warning light switch
turns on a dash light if the brake fluid in the master cylinder becomes low
69
metering valve
designed to equalize braking action at each wheel during light brake applications
70
proportioning valve
is also used to equalize braking action in systems with front disc brakes and rear drum brakes
71
combination valve
a single unit that functions as a brake warning light switch, a metering valve, and/or a proportioning valve
72
electronic parking brake
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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