Automotive Engineering I (Monday)

Student Name:                                                                     Student Class Number:

 

1- What are the differences between: Gasoline engine and diesel 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 1^st gear ratio:

 

 

 

B) The N_output:

 

 

 

C: The P_output:

3-What are the advantages of:

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

 

 

 

B) diaphragm clutch over multi-springs clutch?

 

 

 

4- What do those curves represent?

 

And what are their units?

 

A:                               [        ]

 

B:                               [        ]

 

C:                               [        ]

 

 

 

 

 

 

 

 

5- The clutch friction plate shown has the following: r = 0.08  m              , m = 0.4   If this plate will fit with a double-plate clutch with a diaphragm spring. The torque of the clutch is found to be 240 N.m. The clutch has a design factor of 1.6. Find: a- the normal force of the springs (Fn), b- the engine torque, c- the outer radius of the friction plate (ro) if the inner     radius (ri) is 0.06 m.

 

 

 

 

 

 

 

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

Cylinder clearance volume (V_c), number of cylinders (n), cylinder volume (V_s), indicated mean effective pressure (imep), engine rpm (N), engine brake power (P_b), specific fuel consumption (SFC).

 

- Write down the following quantities using the above symbols:

 

* The engine compression ratio (r)

 

 

 

* The engine indicated power (P_i)

 

 

 

* The mechanical efficiency (h_m)

 

 

 

 

B) What is the job of the clutch in the car?

 

 

 

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

 

 

 

 

D)What are the units of the following:

 

i) Fuel consumption:

 

 

ii) Compression ratio: