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Automotive Level 2 > Single Dry-Plate Clutch > Flashcards

Single Dry-Plate Clutch Flashcards

1
Q

Where is the clutch located?

A

Between the gearbox and engine

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2
Q

In order of position in the car, starting with the engine, sort these components.

Clutch plate
Engine
Gearbox input shaft
Flywheel

A

Engine, flywheel, clutch plate, gearbox input shaft

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3
Q

As you sit in the driver’s seat and press the clutch, what happens to the flywheel and clutch plate

A

They separate from each other, meaning the engine is temporarily unaffected by the gearbox input shaft (or the gearbox)

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4
Q

If the flywheel and clutch plate are almost touching, but not quite, what happens?

A

The clutch slips, the clutch plate rotates slower than the flywheel and they start to burn from the friction of rubbing against each other.

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5
Q

Which energy conversion takes place in the clutch?

A

Rotational movement to heat.

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6
Q

What 2 components connect the gearbox input shaft and the clutch plate?

A

The thrust bearing (small) and the clutch release assembly (larger than thew clutch plate and has the arc reactor look)

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7
Q

Give 2 features of the single dry-plate clutch

A

Not lubricated, only one clutch plate

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8
Q

What’s the function of the clutch plate?

A

Provides connection to the gearbox

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9
Q

What’s the function of the clutch release assembly?

A

It provides engagement and disengagement

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10
Q

What’s the function of the thrust bearing?

A

It ensures that the pedal force is transferred to the clutch release assembly

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11
Q

What’s the function of the flywheel?

A

It provides a connection for the engine and the clutch plate

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12
Q

What 2 main components make up the clutch release assembly?

A

The housing and the diaphraghm spring

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13
Q

List the 5 main components of the clutch plate

A

Friction rings, lining carrier, hub, tosional damping springs, clutch lining

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14
Q

What is meant by this statement: ‘a clutch is a wear-component’?

A

The clutch lining is designed to wear faster than the flywheel and clutch pressure plate

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15
Q

What did the clutch lining used to made of and what is it now made of?

A

Asbestos. An organic lining material.

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16
Q

Why does the clutch lining contain metal particles?

A

To enhance thermal conductivity

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17
Q

Why are there grooves in the plate lining?

A

To dissipate heat and dirt

18
Q

How is the clutch lining fixed to the lining carrier?

A

Riveted fixings

19
Q

Which direction are the rivets in the clutch lining?

A

Alternate directions

20
Q

What are the rivets in clutch linings made of?

A

Copper, brass or steel

21
Q

Why are rivets not used every third hole that a rivet would go?

A

So the clutch plate doesn’t stick to the flywheel

22
Q

Which of these requirements is not essential for a clutch plate to meet:
High friction coefficient
Low weight
Silent operation
Long service life
Able to withstand high temperatures
Good heat dissipation
Capable of high-speed rotation
Good mechanical strength

A

Capable of high-speed rotation

23
Q

What is the axial springing?

A

A rubbery material inside the lining carrier that prevent a ‘snatching attatchment’, which is a sudden jolting when the flywheel and clutch plate touch without something in between them. Also known as the resonance springing.

24
Q

How many segments does the lining carrier have?

A

8

25
Q

What do torsional damping springs look like? Why?

A

A small spring inside a bigger spring. To counteract different frequencies in vibration.

26
Q

Is the motion of the crankshaft smooth or uneven?

A

Uneven

27
Q

What are torsional damping springs used for?

A

To counteract the unevenness of the crankshaft rotation when it transfers to the input shaft of the gearbox

28
Q

What type of bearing is used in a thrust bearing

A

An anti-friction bearing

29
Q

List 6 components of the thrust bearing, in order

A

Inner race, retainer spring, ball bearings, outer race, housing, guide bush

30
Q

A thrust bearing can either have a rotating inner race or a rotating outer race. Which one is used most often in modern cars and why?

A

Inner race. Because it has a lower weight and a lower rotational speed.

31
Q

Name the 2 types of thrust bearings. Which is used most often?

A

Rotating, non-rotating. Rotating.

32
Q

What are the 2 ways that the clutch pedal can operate the clutch fork?

A

Hydraulically or mechanically

33
Q

When the clutch pedal operates the clutch fork mechanically, what is usually used to connect them?

A

A Bowden-cable

34
Q

What is the function of the cable sheath on the cable that connects the clutch pedal and the clutch fork?

A

Protect the inner cable from the force of the clutch operation

35
Q

How is the clutch fork operated in mechanical operation?

A

The cable pulls the fork

36
Q

Give 2 disadvantages of mechanical operation between the clutch pedal and clutch fork

A

Lot of friction between the cable and sheath, meaning efficiency is about 70%. Moisture in the cable can freeze up, jamming the clutchf.

37
Q

There are self-adjusting and manually adjusted mechanisms in the free play. Why does it need adjustment?

A

The play between the diaphragm and the thrust bearing decreases when the clutch plate gets worn.

38
Q

Name the 4 main parts of the hydraulic operation diagram (between the clutch pedal and the clutch fork)

A

Master cylinder
Metal pipe
Flexible hose
Hydraulic slave cylinder

39
Q

When pressing the clutch pedal down, what happens to spring in the master cylinder? What happens to the piston in the master cylinder? How about the spring and piston in the slave cylinder?

A

Spring is compressed, piston is extended. Opposite for the slave cylinder.

40
Q

In hydraulic operation between the clutch pedal and clutch fork, what are the 2 main components of a cylinder?

A

Spring and piston

41
Q

Give 2 advantages of hydraulic operation

A

Doesn’t require much maintenance. Not much friction, meaning the efficiency is about 90%

42
Q

How do you adjust the free play?

A

Adjust the 2 nuts on either side of it

Automotive Level 2 (20 decks)

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