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Motive Action > Suspension System > Flashcards

Suspension System Flashcards

1
Q

Describe a body over frame.

A

Body of the vehicle is bolted to the frame

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2
Q

Describe a ladder frame.

A

has two main rails with multiple cross members

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3
Q

Describe a perimeter frame.

A

Wider and lighter than a ladder frame, supporting the passenger compartment on the outside edges

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4
Q

Describe the unitized body system (unibody).

A

Combines frame and body together. Lighter, safer, stronger, providing greater protection to collisions.

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5
Q

What are the several important functions of a suspension system?

A
  • supports the weight of the frame, body, engine, transmission, drivetrain, and passengers.
  • allows rapid cornering without body roll
  • keeps tires in firm contact with the road
  • prevents excessive body squat
  • allows wheels to turn side to side
  • works with the steering system to keep wheels in correct alignment
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6
Q

Describe the upper and lower control arms.

A

Moveable lever that fastens between the frame or unibody with upper or lower ball joints to support the steering knuckle.

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7
Q

Describe the control arm bushings.

A

Bonded rubber sleeve, is part of the control arm, connects arm to Fran/body and allows movement

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8
Q

Describe the ball joints.

A

Swivel joints in the the lower and upper control arms allowing the steering knuckle to move up and down and rotate side to side.

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9
Q

Describe the steering knuckle.

A

Connects to the ball joints and provides a spindle or support for the hub, wheel bearings, brake caliber, steering linkage, wheel and tire.

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10
Q

Describe the stabilizer bar/sway bar.

A

Used to prevent the body from leaning too much on turns, attached to the body with bushings and to the lower control arm.

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11
Q

Describe the radius strut bar.

A

Connects lower control arm to the frame/unibody

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12
Q

What are the 4 different types of springs?

A

Coil spring, leaf spring, air spring, torsion bar

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13
Q

Describe the coil spring.

A

Spring steel rod wound into a spiral, found on struts or between the frame and lower control.

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14
Q

Describe the leaf spring.

A

Flat spring steel plate strips bolted together in an arc, one end anchored with a bushing to the frame, other end uses a shackle, U bolts are used to attach the springs to the axle.

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15
Q

Describe the air spring.

A

Two ply rubber cylinder that is filled with air mounted between the frame and the lower control arm or the frame and the rear axle.

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16
Q

How are air springs controlled?

A

By a manual switch or uses level sensors

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17
Q

Describe the torsion bar.

A

Large spring steel rod, on end attached to the frame other end to the upper or lower control arm.

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18
Q

Describe spring rate.

A

Refers to the stiffness or tension of the spring

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19
Q

Describe sprung weight.

A

Is the weight of the parts supported by the springs and suspension.

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20
Q

Describe Unsprung weight.

A

Is the weight of the parts not supported by the springs, wheels, tires, bearings, steering knuckle, and axle housing.

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21
Q

Describe a jounce bumper.

A

A hard rubber block that Keeps suspension from hitting the frame or struts and shocks from bottoming out.

22
Q

Describe a strut.

A

-integrates numerous different suspension parts into one assembly

23
Q

Describe a shock.

A

-consists of a piston in a sealed tube filled with gas and/or liquid.

24
Q

Describe the shock absorber in a basic strut assembly.

A

Piston operating in an oil filled cylinder.

25
Q

Describe the dust shield of a basic strut assembly.

A

Rubber cover that keeps dirt off the shock absorber rod

26
Q

Describe the lower spring seat on a basic strut assembly.

A

Mounting place for the bottom of the coil spring.

27
Q

Describe the coil spring part of a basic strut assembly.

A

Supports the weight of the vehicle, allows suspension action.

28
Q

Describe the upper spring seat on a basic strut assembly.

A

Mounting place for the top of the coil spring.

29
Q

Describe the strut bearing on a basic strut assembly.

A

Ball bearing that allows the strut assembly to rotate on steering action.

30
Q

Describe the rubber bumpers on a basic strut assembly.

A

prevent metal on metal contact

31
Q

Describe the rubber isolators on a basic strut assembly.

A

Prevents noise transmitting through the body

32
Q

Describe the upper strut retainer on a basic strut assembly.

A

Mount that joins the upper end of the strut assembly to the frame or uni-body

33
Q

Describe the strut rod nut on a basic strut assembly.

A

Nut that holds the shock rod to the upper strut retainer

34
Q

Describe the gas charged strut on a basic strut assembly.

A

Has a low pressure gas to help prevent the oil foaming as it heats up from friction

35
Q

Describe a shock absorber.

A

Limits up and down spring movement. Gas charged to keep oil from foaming

36
Q

What are the 2 types of suspension?

A

Independent and non-independent

37
Q

Describe a independent suspension.

A

Allows one wheel to move up and down with little effect on the other wheels, most common on newer vehicles.

38
Q

Describe a non-independent suspension.

A

Up and down movement of a wheel one side will affect the other side

39
Q

Describe a beam axle of a rear suspension.

A

Also called a dead axle is a solid rear axle beam, Uses a track bar (lateral rod) to prevent side to side movement on cornering.

40
Q

Describe a semi independent suspension.

A

Has the right and left wheel partially independent from each other

41
Q

Describe a independent rear suspension.

A

Is found with the rear diff mounted inside a rear subframe

42
Q

Describe a long and short arm suspension.

A

Uses different length upper (short) and lower (long) control arms to keep the wheel from tilting in or out with suspension action

43
Q

Describe a manual suspension levelling system.

A

Is done with manually operated switch, using an air compressor for the air springs.

44
Q

Describe a automatic suspension levelling system.

A

Uses height sensors to activate the air compressor for the air springs.

45
Q

Describe the active suspension levelling system.

A

Uses hydraulic rams instead of air springs, computer reacts and adjusts each ram accordingly, allows vehicle to remain level and steady.

46
Q

Describe frames.

A

Form a common platform for attachment of all major vehicle components

47
Q

Describe the purpose of springs.

A

Supports weight of vehicle, flexes to permit control arm and wheel assembly to move up and down

48
Q

Describe the purpose of struts and shocks.

A

Limiting spring oscillation or dampening if the up and down compression and extension of the springs

49
Q

Some struts and shocks are adjustable, how is this done?

A

By rotating the shock rod to open and close the oil bypass valve inside the shock

50
Q

Describe a self levelling shock absorber.

A

Uses hydraulic lock action to maintain normal curb height

51
Q

How is the rate of a spring determined?

A

rate is determined by the weight it takes to bend and compress.

Motive Action (14 decks)

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