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The internal diameter of the tube in which the piston of an engine or pump moves.



Related Terms

HUMPHREY GAS PUMP

A combined internal combustion engine and pump in which the metal piston has been replaced by a column of water.

FOUR-STROKE CYCLE

An internal combustion engine cycle completed in four piston strokes; includes a suction stroke, compression stroke, expansion stroke, and exhaust stroke.

CYLINDER BLOCK

The metal casting comprising the piston chambers of a multicylinder internal combustion engine. Also known as block; engine block.

FUEL INJECTOR

A pump mechanism that sprays fuel into the cylinder of an internal combustion engine at the appropriate part of the cycle.

JERK PUMP

A pump that supplies a precise amount of fuel to the fuel injection valve of an internal combustion engine at the time the valve opens; used for fuel injection.

KICKBACK

A backward thrust, such as the backward starting of an internal combustion engine as it is cranked, or the reverse push of a piece of work as it is fed to a rotary saw.

MIXED CYCLE

An internal combustion engine cycle which combines the Otto cycle constant-volume combustion and the Diesel cycle constant-pressure combustion in high-speed compression-ignition engines. Also known as combination cycle; commercial Diesel cycle; limited-pressurecycle.

OVERSQUARE ENGINE

An engine with bore diameter greater than the stroke length.

ELECTRIC IGNITION

Ignition of a charge of fuel vapor and air in an internal combustion engine by passing a high-voltage electric electron flow.

MINOR DIAMETER

The diameter of a minor diameter minor loop cylinder bounding the root of an external thread or the crest of an internal thread.

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