A cylindrical plug that moves up and down in the cylinder during combustion.
piston ring
A device that uses electricity to create a spark to ignite the fuel.
spark plug
It is the bottom part of the engine surrounding the crankshaft.
crankcase
It is a rod that connects the piston to the crankshaft.
connecting rod
It is the stage in the four-stroke cycle in which a piston moves to the bottom of the cylinder and makes room for fuel and air to enter the cylinder. Fuel and air are forced in through the intake valve.
intake stroke
It is a ring that seals the cylinder head to maintain the proper pressure inside the cylinder and prevent substances from leaking in or out.
head gasket
It is a type of engine commonly used in cars, aircraft, and other machinery. It cycles through four stages, or strokes, called intake, compression, power, and exhaust.
four stroke engine
It is the part of a four-stroke engine that houses the valves and often contains passages for transferring excess heat away from the engine.
cylinder head
It is a device in some diesel engines that heats the air in the combustion chamber when the engine is cold.
glow plug
It is a device that forces fuel into the combustion chamber.
fuel injection pump
It is a place within an engine where fuel is compressed and ignited.
combustion chamber
To ________ a source of fuel is to be powered by it.
run on
If something is ______________, it can withstand a lot of use and stress.
durable
It is a small contained space where fuel is ignited before entering the main combustion chamber.
precombustion chamber
To make something hotter or to increase something's temperature.
heat up
