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MMME3070 - Intro to Auto > Braking and Tyres > Flashcards

Braking and Tyres Flashcards

1
Q

Drum and Shoe

A

Shoes are forced radially onto the drum of the wheel.

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2
Q

Advantages of Drum Brakes

A

Handbrake is easily integrated
Weatherproof

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3
Q

Disadvantages of Drum Brakes

A

Poor cooling: as drum gets hot it expands reducing braking effect.

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4
Q

Disc and Caliper

A

Most common type
Seperate disk from wheel calipers fit over it which are actuated by hydraulic pressure

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5
Q

Tread

A

Part of the tyre that comes into contact with the road surface.
Protects the carcass and provides high grip, durability and manoeuvrability

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6
Q

Steel Belts

A

Provides stiffness to the tread and protects the carcass

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7
Q

Spiral Layer

A

Provides high durability and manoeuvrability

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8
Q

Sidewall

A

Most flexible part of the tyre
Protects the carcass and provides comfortable ride

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9
Q

Shoulder

A

Thickest part of the tyre
Protects the carcass from shocks and damages

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10
Q

Plycord

A

Main body of the tyre
Sustains inflation pressure
Endures load and road shocks

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11
Q

Bead Filler

A

This provides high durability & manoeuvrability

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12
Q

Bead Wires

A

Holds the tyre on the rim

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13
Q

Chafer

A

Protects the plycord at teh bead area from the heat generation of the abrasion between the bead and rim flange

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14
Q

Camber

A

Angle of the axis of the wheel relative to the ground

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15
Q

Castor

A

Angle of the wheel as seen from the side of the vehicle

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16
Q

Roll Centre

A

The point in the transverse vertical plane through any pair of wheel centers at which lateral forces may be applied to the sprung mass without producing suspension roll
The roll centre is important as the distance from the roll centre to the vehicle centre of mass (gravity) results in a rolling moment when a cornering force is present

17
Q

Roll centre by drawn calculation

A

Extend lines of struts to the point where they meet. Then draw a line from the point at which the tyre meets the road to the point just found
The roll centre is on this line where it meets the vehicle centre line

18
Q

Ackerman Angles

A

Varies the steering angle based on the radius of the curve. Inside wheel has a greater angle than the ouside wheel

19
Q

Ackerman Usage

A

Ackerman is used on road vehicles. Racing cars may suit parallel or reverse Ackerman

20
Q

Coefficient of friction

A

In dry conditions - 1.0 - 1.1
In wet conditions - 0.6 - 0.7

MMME3070 - Intro to Auto (6 decks)

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