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AHMAD ABDULLAH BIN HAJI JALBAH MAKTAB KEJURUTERAAN JEFRI BOLKIAH
13
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Page 1: engine

AHMAD ABDULLAH BIN HAJI JALBAH

MAKTAB KEJURUTERAAN JEFRI BOLKIAH

Page 2: engine

TWO-STROKE ENGINE AND FOUR-STROKE

ENGINE

Page 3: engine

CONTENTS INTRODUCTION

TWO-STROKE

FOUR-STROKE

ADVANTAGES

DISADVANTAGES

CONCLUSION

Page 4: engine

INTRODUCTION

What is two-stroke engine?internal combustion engine that completes the process

cycle in one revolution of the crankshaft.

What is four-stroke engine?known as four-cycleInternal combustion engine in which

the piston completes four separate strokes cycle

Page 5: engine

TWO-STROKE

Page 6: engine

PARTS

Combustion chamber

Exhaust outlet

Crankcase

Spark plug

Piston

Reed valve

Fuel intake

Fuel

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OPERATION

Page 8: engine

FOUR-STROKE

Page 9: engine

PARTS

Exhaust port

Connecting rod

Crankshaft

Crankcase

Piston

Cooling fins

Exhaust valve

Spark plug

Intake valve

Intake port

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OPERATION

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ADVANTAGES

Do not have valves, simplifying their construction.

Fire once every revolution.Lighter, and cost less to manufacture. Potential for about twice the power in the same size

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DISADVANTAGES

Don't live as longOil can be expensive.Produce more pollution. Do not use fuel efficiently, yielding fewer miles per gallon. 

Page 13: engine

CONCLUSION

Which one do you prefer?