PRESENTATION

ON

DESIGN OF PISTONS

Prepaded by :

Mehul Gohel1

PISTON DESIGN CONSIDERATIONS

Pistons must:

Contain cylinder pressure

Transmit the pressure created by combustion to force

on the connecting rod

Provide a place for oil control and compression rings

to be located

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PISTON DESIGN CONSIDERATIONS

Pistons must:

Be rigid enough to not deform under the tremendous

pressures and forces encountered

Be ductile enough to absorb pressure peaks and not

shatter

Retain the proper shape under the extreme

temperatures encountered

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PISTON CONSTRUCTION

Materials

Cast iron (used in very old engines)

Cast aluminum (most common)

Forged aluminum

Hypereutectic alloys (high silicon content aluminum)

Carbon Graphite (being tested)

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PISTON CONSTRUCTION

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PISTON CONSTRUCTION

Piston design

Piston rings

Barrel of piston

Piston skirt

Piston pin

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PISTON DESIGN

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DESIGN OF PISTON

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PISTON RINGS

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BARREL OF PISTON

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MAJOR/MINOR THRUST

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PISTON SKIRT

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PISTON PIN

Piston Pin Offset

The piston pin is offset towards the major thrust side

of the piston to reduce piston wear, and piston noise

The major thrust side is the side that is loaded during

the power event

The minor thrust side is the side loaded during the

compression event

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PISTON PIN

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PISTON PIN

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