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 are the points that should be kept in mind during forging design?

0 Answers   Bechtel,

---

arrange the efficiency of the engine in decreasing order OTTO, DIESE& DUEL ?

2 Answers   Infosys,

---

what is the viscosity of hydraulic oil?

1 Answers   ONGC,

---

Why did you leave your last job?

1 Answers   IBEX, Nikhil Comforts, Ranbaxy, Sabic,

---

State newton's three laws of motion.

0 Answers  

---

what is difference between en8 and en24.if the usseage of motor shaft en8 what problems faceing?and what are the advantage of en24?

5 Answers  

---

Did elevation affect weight?

0 Answers  

---

workingh principle of valve timing chart for cummins engine

0 Answers  

---

How many brothers and sisters U have? :)

0 Answers   HAL,

---

What is the difference between CFM & PSI?

3 Answers   Gammon, Nalco, Sata Vikas, Siemens,

---

Why do we use compressor in pumps for pumping water through borewells? Submersible pump is enough then why do we go for this method?

4 Answers  

---

how to work rack and pinion method

2 Answers   Indo US MIM Tec,

---