A presentation onValve and Port timing diagrams

of IC engines

By,Vinay Kumar Addagiri

14761A0361

IC Engines

IC engines play a vital role In our day to day life. They are inseparable from our daily activities.

They played a major role in industrial revolution.

They are also used for various domestic and industrial purposes.

They are considered the hearts of all automobiles, aircrafts and ships.

They are also widely used in cutting and drilling machinery.

IC Engines

They eased up transportation and connected various parts of the world. Thus they helped in achieving globalization.

Working ofIC Engines4 - Stroke

Working of4 Stroke Engine

Suction

Compression

Power

Exhaust

Theoretical Valve Timing Diagram

Inlet valve opening

Inlet valve Closing

Exhaust valve Closing

Exhaust valve opening

SuctionCompressionPowerExhaust

TDC

BDC

Actual Valve Timing Diagram

TDC

BDC

Inlet valve opening

Inlet valve Closing

Exhaust valve Closing

Exhaust valve opening

SuctionCompressionPowerExhaust

βθ

φ αCrank angle =

Circumference of fly wheel in cm

X 360oArc length in cm

Working ofIC Engines2 - Stroke

Working of2 Stroke Engine

Compression(Up Stroke)

Power(Down Stroke)

TDC

BDC

IPC

EPO

TPOTPC

EPC

IPO

β β

θθ

φ φ

TransferenceCompressionPowerExhaust

Port Timing Diagram

Crank angle = Circumference of fly

wheel in cm

Arc length in cm X 360o

Thank you

Any queries??