Question: Why it is necessary to cool
(1) cylinder head
(2) cylinder liner
(3) piston of diesel engine
Answer:
Temperature inside the cylinder may rise to 2000 degree c during combustion and drops to 600 degree c at the end of expansion. so a temperature gradient is created.
with temperature in this range, these components would get heated up quickely to a point where its strength would be insufficient to withstand cylinder pressure.
No oil film would be able to exist on the cylinder wall
Lubrication of the cylinder and piston ring would break down.
Medium of cooling:
Cylinder liner- Fresh water
Piston- fresh water( older engines), oil( new engines)
(1) cylinder head
(2) cylinder liner
(3) piston of diesel engine
Answer:
Temperature inside the cylinder may rise to 2000 degree c during combustion and drops to 600 degree c at the end of expansion. so a temperature gradient is created.
with temperature in this range, these components would get heated up quickely to a point where its strength would be insufficient to withstand cylinder pressure.
No oil film would be able to exist on the cylinder wall
Lubrication of the cylinder and piston ring would break down.
Medium of cooling:
Cylinder liner- Fresh water
Piston- fresh water( older engines), oil( new engines)
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