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Steering > Steering > Flashcards

Steering Flashcards

1
Q

What is the purpose of Toe?

A

Is to compensate for any deflection in the steering linkage.

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2
Q

What is Steering Axis?

A

It is an invisible line drawn through the centre of the kingpin when viewed from the side.

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3
Q

What is positive Caster?

A

Result when the top of the steering axis is tilted toward the rear of the vehicle. The kingpin centreline must be to the rear of the vehicle.

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4
Q

What is negative Caster?

A

Result when the top of the steering axis is tilted toward the front of the vehicle. The kingpin centreline must be in front of the centre line.

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5
Q

What is Zero Caster?

A

Result when the kingpin centre line and the vertical line overlap.

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6
Q

What is the purpose of Caster?

A

Caster increase the vehicle’s tendency to want to go straight and help return the steering wheel to the straight head position after a turn.

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7
Q

What are the steering angles that make up steering geometry?

A 
Toe
Caster
Camber
Kingpin inclination
Turning radius
Thrust and Scrub
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8
Q

What are tire wearing angles?

A

Camber, Toe, and turning radius

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9
Q

What are directional control angles?

A

Caster, and kingpin inclination

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10
Q

What is Toe?

A

It is the difference in distance between the front and the rear of the wheels on the same axle, measured at hub/spindle centreline.

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11
Q

What is Caster

A

Caster is the forward or backward tilt of the kingpin at the top viewed from the side

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12
Q

Where is attached the Pitman arm?

A

To the sector shaft.

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13
Q

What is the Worm shaft (input shaft)?

A

It is where the steering shaft is attached.

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14
Q

How is attached the steering shaft to the worm shaft?

A

Via a split yoke and pinch bolt

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15
Q

What is the purpose of the steering gear?

A

Is to transmit the driver’s intentions from the steering wheel to the linkage.

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16
Q

What is the steering knuckle?

A

It is the assemble that contains the Kinpin.

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17
Q

What is the Hinge pin?

A

One side is called the steering knuckle and the other the I beam axle.

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18
Q

What is the steering stop screw?

A

It is a stop that limit the amount of pivot of each tire assembly.

19
Q

What is SRS?

A

Supplemental restrain systems (air bag)

20
Q

What is the position of a steering wheel?

A

8-4 +- 10%

21
Q

What are the types of steering gear?

A
  • Manual steering gear
  • Integral power steering gear
  • Rack and pinion steering
22
Q

What is the purpose of the pitman arm?

A

To change the rotary motion of the sector shaft into linear motion that can be transferred to the drag link.

23
Q

What is the purpose of the upper steering arm?

A

To transmit the motion of the drag link to the steering knuckle.

24
Q

What is the purpose of the steering knuckle?

A

To allow each wheel assembly to pivot during cornering.

25
Q

What is the Thrust bearing?

A

It withstand the load imposed on the axle and steering knuckle by the weight of the vehicle.

26
Q

Which angles are tire wearing angles

A

Camber, turning radius, toe

27
Q

Which angles are directional control angles

A

Caster and kingpin inclination

28
Q

What is Camber

A

Camber is the outward or inward tilt of the wheel at the top viewed from the front.

29
Q

What is KPI

A

Kingpin inclination angle

30
Q

What is camber pull

A

Result in a pull on the side of the most positive setting.

31
Q

Purpose of KPI

A
  • reduces the need for high camber
  • brings the point of contact more directly under the point of load
  • provide a pivot point for the wheel to turn
  • provides steering stability
  • reduces road shock
  • reduces brake pull
32
Q

What is induced angle

A

camber angle + KPI angle

33
Q

What is scrub radius

A

the distance between the projected steering axis and the center of the tire contact area measured at the road surface.

34
Q

What is turning radius

A

toe out on turns

35
Q

What is the purpose of turning radius

A

to reduce tire scuffing during cornering

36
Q

What is Ackerman principal

A

Draw a line that passes through the center of the kingpin and tie rod end it will meet at the center of the rear axle on a single axle and will meet at the center of the rear axles on tandem

37
Q

What is thrust angle

A

it is the angle formed by the thrust line and the geometric center line and is the difference between GCL and thrust line

38
Q

What is VCL

A

Vehicle center line and runs down the middle of the vehicle

39
Q

What is GCL

A

Geometric center line and is determined by the midpoints of the front and rear wheels

40
Q

What is scrub angle

A

Is the angle formed by the intersection of the horizontal lines drawn through the rear axle when total toe and offset is zero

41
Q

Positive scrub?

A

Will push front of vehicle to the right and scrub the right side of tires

42
Q

Negative scrub?

A

Will push the front of the vehicle to the left and scrub the left side of the tires

43
Q

What is a trammel bar?

A

used to measure the distance from the center shaft of axlesrear

44
Q

What are non adjustable angles?

A

KPI Kingpin inclination and turning radius

Steering (1 decks)

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