Glossary “piston ring” Definition:
A split, expandable metal ring placed around a piston to seal the space between the piston and the cylinder.
What is piston?
piston oil ring
Glossary “piston oil ring” Definition:
Term used for oil ring.
piston oil squirt hole
Glossary “piston oil squirt hole” Definition:
Term used for oil squirt hole.
piston material
Glossary “piston material” Definition:
Material used in piston construction, usually cast- or forged-alloy aluminum.
piston dome
Glossary “piston dome” Definition:
Shape of the piston top, which serves as the base of the combustion chamber.
piston head
Glossary “piston head” Definition:
That part of the piston above the rings.
piston lands
Glossary “piston lands” Definition:
Those parts of the piston between the piston rings.
piston markings
Glossary “piston markings” Definition:
Marks on a piston which are used to identify piston oversize and the front of the piston.
piston boss
Glossary “piston boss” Definition:
That part of the piston which supports the piston pin.
piston bushing
Glossary “piston bushing” Definition:
Bushing that is pressed into the upper end of the connecting rod when free-floating pins are used.
piston collapse
Glossary “piston collapse” Definition:
Condition describing a collapse or a reduction in diameter of the piston skirt due to heat or stress.
piston crown
Glossary “piston crown” Definition:
The top of the piston. It forms the bottom of the combustion chamber.
piston displacement
Glossary “piston displacement” Definition:
Cylinder volume displacement by the piston as it travels from the bottom to the top of the cylinder during one complete stroke.
piston
Glossary “piston” Definition:
1). Engine part that reciprocates in the cylinder and transfers the force of the expanding gases via the piston pin and connecting rod to the crankshaft. 2). A round, caliper component in a disc brake that is moved outward by fluid pressure to press the pads against each rotor face. 3). An aluminum or sintered-iron component of a drum brake inside a wheel cylinder that supports the cylinder cup. 4). That part of a compressor that is driven by a crankshaft to compress vapor. 5). A small piston fitted inside a hollow cylinder which moves back and forth by fluid pressure to transmit reciprocating motion inside the transmission.