Answer / om

It's kept so to pack more charge. If the inlet valve is
allowed to close at the starting of the comp. stroke the
pressure inside the cylinder will be below atmospheric. The
inlet valve is kept open few degrees during compression
stroke to pack a more charge under a presuure of charge
that enters through intake manifold and against the pre. of
rising piston during compression stroke. This is calles ram
effect

Answer / karthick

the reason behind that is some unburnt gas will be left in
the cylinder.so while compressing the fresh charge pushes
the unburnt gas from the cylinder for a short period

Answer / satish

at end of suction
stroke piston velocity
decreses if suction is
full charge piston
require more force
hence to decrease
pipstan force valve
kept open

Answer / chaitanya pithawa

high suction is created in the cylinder and so the inlet air
coming from outside is very rapid,so due to inertia force of
the air and initially strarting of the compression doesnt
much affect the compression stroke.
so the purpose is to allow higher amount of the oxygen in
the cylinder,so after completion of suction stroke and
inlet valve open for few degrees.

what will happen when petrol pour into diesel engine?

17 Answers   APGenco, Hero Honda, Lupin,

---

What is critical temperature in metals ?

0 Answers  

---

The higest value of thermal conductivity is expected for a.) Solid ice b.) Melting ice c.) Water d.) Boiling water Give the thermal conductivity value for each.

2 Answers  

---

what is the difference between technology and engineering ?

3 Answers  

---

Explain the advantages of cycloidal and involute gears?

0 Answers  

---

---

what is the injection moulding

1 Answers  

---

Hi i am riyaz ahmed . i got rejected for first time and i nedd to apply for next time and can i apply in 1 or 2 week . and wt abt my sevies fee ? i should make a new once shill i go with the same and wt docement i should change can u plz help me out and my mail it is royalriyaz@gmail.com

0 Answers  

---

what is the abbreviation of welding rod 7018?

7 Answers  

---

plz anyone provide me the sample test papers of ONGC as of i m from Mechanical engg bakground and would be appearing for the test in the june 2010. My email id - neeraj_94312@rediffmail.com

0 Answers   TATA,

---

What resistance the ship encounter when the vessel is at sea

0 Answers   RRB,

---

Why did you choose this career as an engineer

6 Answers   HCL,

---

How differential gear boxex work?

5 Answers  

---