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



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A combined internal combustion engine and pump in which the metal piston has been replaced by a column of water.

EXHAUST VALVE

The valve on a cylinder in an internal combustion engine which controls the discharge of spent gas.

FOUR-STROKE CYCLE

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

COMPRESSION IGNITION

Ignition produced by compression of the air in a cylinder of an internal combustion engine before fuel is admitted.

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.

DUAL-FUEL ENGINE

Internal combustion engine that can operate on either of two fuels, such as natural gas or gasoline.

GAS ENGINE

An internal combustion engine that uses gaseous fuel.

OVERHEAD-VALVE ENGINE

A fourstroke-cycle internal combustion engine having its valves located in the cylinder head, operated by pushrods that actuate rocker arms. Abbreviated OHV engine. Also known as valve-in-head engine.

ELECTRIC IGNITION

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

LIQUID-COOLED ENGINE

An internal combustion engine with a jacket cooling system in which liquid, usually water, is circulated to maintain acceptable operating temperatures of machine parts.

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