Small Gas Engines - Engine Construction and Principles of Operation - Chapter 4

hydrocarbon fuel refined from petroleum. Mixture of hydrogen and carbon.

a group of liquid and gaseous compounds composed of carbon and hydrogen, which are removed from the earth.

assigned to gasoline to represent its ability to resist detonation.

gasoline must be broken up into tiny droplets and mixed with air to produce rapid burning.

the largest single part of an engine. The basic or main mass of metal in which the cylinders are bored or placed.

located on the outside of cylinder and cylinder head on air-cooled engines and engineered for efficient air circulation and heat control.

the main shaft of an engine that, working with the connecting rods, changes the reciprocating motion of the pistons into rotary motion.

the housing for the crankshaft and other related internal parts.

pouring molten metal into a form of a desired shape.

a cylindrical part that is closed at one end and connected to the crankshaft by the connecting rod. The force of the explosion pushes the piston.

an expanding ring placed in the grooves of the piston to seal it against the passage of fluid or gas.

the journal for the bearing in the small end of an engine connecting rod. Pin also passes through the piston walls.

same definition as piston pin.

rod that connects the piston to the crankshaft.

the openings in the cylinder block for valves, exhaust and inlet pipes, or water connections. In two-cycle engines, the openings for inlet and exhaust purposes.