Automotive Engineering I

Student Name:                                                                     Student Class Number:

 

1- What are the requirements for good ignition in spark ignition engine:

 

*

 

*

 

*

 

*

 

 

 

2- If the input to gear A is equal to

N_{input  =}  N_A = 4000 rpm

T_input = T_A = 150 N.m

h_g = 85 %

Find:

A) The 2^nd gear ratio:

 

 

 

B) The T_output:

 

 

 

C: The P_output:

 

 

 

 

 

3-What are the advantages of:

A) front engine & FWD over front engine & RWD?

 

 

B) 2-stroke engine over 4-stoke engine?

 

4- What do those curves represent?

 

And what are their units?

 

A:                               [        ]

 

B:                               [        ]

 

C:                               [        ]

 

 

 

 

 

 

 

 

5- The clutch friction plate shown has the following: rm = 0.10  m              , m = 0.3   If this plate will fit with a double-plate clutch with multi springs. The total friction force (Ff) is 1200 N. Find: a- the normal force (fn). b- the clutch torque (Tc) c- the design factor (fd) if the engine torque is 100 N.m

 

 

 

 

 

 

 

6- (A) The following data of a four stroke engine is known as:

Engine swept volume (V_e), number of cylinders (n), compression ratio (r)

indicated power (P_i), engine rpm (N), engine brake power (P_b),

 

- Write down the following quantities using the above symbols:

* The cylinder clearance volume (V_C)

 

 

 

 

* The engine mechanical efficiency (h _m)

 

 

 

 

*The indicated mean effective pressure (imep)

 

 

 

 

B) What is the job of diaphragm spring in the friction clutch?

 

 

 

 

C) What are the friction surfaces of the surfaces of the friction clutch?

 

 

 

 

D) What are the units of the following quantities?

 

i- Specific fuel consumption (SFC).

 

 

ii- Engine thermal efficiency (h_th).