Automotive Engineering I	Exam 1-a	1st Semester 1427/28
Student Name:		Student Class No.    /

 

1- Identify the following abbreviations (عرف معنى الاختصارات التالية):

SI
DOHC
AWD
VVT

 

2-What are the units of the following quantities ؟(ما وحدات الكميات التالية)

Engine thermal efficiency (hth)
Clutch torque capacity (Tc)
Engine angular speed (w)

 

3- The following data of a 4-stroke engine is given below:
The indicated mean effective pressure (imep), the cylinder bore (d_cy), and the stroke (L), the number of cylinders (n).

 

-Write down the following quantities using the above symbols

 (أكتب الكميات التالية باستخدام الرموز الموجودة بعالية):

* The engine swept volume (V_e)

 

 

 

* The force exerted on the piston (F)

 

 

 

* The work done (W) by the force during the power stroke

 

4- Write down the equations of the following quantities, and identify each parameter

 (أكتب معادلة الكميات التالية, مع تعريف عناصر المعادلة)

The engine indicated power (Pi)
The engine mechanical efficiency (hm)

Where:

 

 

5- What are the differences between the following  (ما الفروق بين التالي) ?

- Engine Indicated (P_i) & Brake (P_b) powers

 

 

 

- Rich & Poor fuel-air mixtures

 

 

 

6- How to increase the following  (كيف نزيد من قيمة التالي) ?

- Engine compression ratio (r)

 

 

- Engine mechanical efficiency (h_m)

 

 

7- What do these curves represent?

(ما الذي تمثله تلك المنحنيات)

And what are their units (وما وحداتها) ?

 

A:                               [        ]

 

B:                               [        ]

 

C:                               [        ]