Automotive Design 

Sample Exam. 1

(1429-1430 2nd Semester)

Student Name: ………………………………………………

Student No.      -      -

ASSUME ANY MISSING DATA

1- A) Define the following:

i- Clutch torque capacity (Tc)

 

 

 

ii- Clutch slippage, and its causes

 

 

 

B) Write down the functions of the following parts:

Part name

Functions

Driving plate

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Diaphragm spring

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C) Types of clutches according to shapes of frictional surfaces

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D) What are the functions of  the car clutch?

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2- A single plate clutch has a torque capacity (Tc) of  180 N m, under a spring normal load (Fn) of  3016 N. The cultch friction plate mean radius (rm) is 80 mm.

 

The friction material is connected to the leaf springs via a number of rivets:

- the rivet cross sectional area (Arivet) is 4.9 mm2

- the rivet material is LM6

 

Assume friction material uniform wear, find:

a) the friction material maximum pressure (pmax),
b) the friction material coefficient of friction (m),

c) the number of rivets (n) due to shear stress, SF = 4

d) Derive the bending  stress (σb) on the hub splines of the clutch friction plate using the symbols (Tc, D, d, b, L,nspline)

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