what is blow by and blow down phenomena in ic engine?

Answer Posted / kk

Blow-by occurs when the explosion that occurs in your
engine's combustion chamber causes fuel, air and moisture
to be forced past the rings into the crankcase. Your
engine's rings must maintain an excellent fit in order to
contain the pressure.

Blowdown is the amount of time/distance/degrees between
exhaust port opening and transfer port opening.
The absolute most accurate description of blowdown would
be... the amount of TIME between the exhaust and transfer
port openings. This "measurement" would of course only be
accurate at one rpm, so blowdown is commonly referred to in
degrees of crank rotation.

Is This Answer Correct ?    31 Yes 4 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

When a 30KW/3 ph pump runs one hour continously, what will be the heat dissipated? how can i find this, any general equation?

1401


Explain the procedure in staring a F.O. purifier

1894


what is bms system and how to work it

1202


What is the maximum P-max for a cylinder in M/E.

1424


hi friends pls send the bhel question papers is very urgent...

1804






What is churning effect of turbine

6560


in a pump, impeller wear ring is harder or casing ring? why?

2042


What are your specific job requirements in mechanical engineers?

577


What should be done to prevent a safety valve to stick to its seat ?

629


What causes hardness in steel ? How heat treatment alters properties of steel ?

648


What is the device that converts sound energy into mechanical energy?

616


explain the mixture requirement of si engine to meet the demands of various operating condition?

2089


why we transfer FA(full arc) to PA(partial arc) in steam turbine at specified load?

1737


Tell me how many btu per hour equals 1 ton of air conditioning?

578


What are the causes if one cylinder in a diesel engine has a high temperature?

1521