Refers to the cylindrical chamber in an engine where fuel is burned. Also used as a counter for cylinders (e.g., 4気筒エンジン).
This car is equipped with a 6-cylinder engine.
Single-cylinder motorcycles are light and easy to handle.
This motorcycle is equipped with a four-cylinder engine.
気筒 specifically means an engine cylinder, while シリンダー is a broader term for any cylindrical mechanical part, including engine cylinders.
気筒 refers to the combustion chamber inside an engine, while 排気筒 refers to the exhaust pipe or flue that carries gases away, despite sharing the 筒 character.
exhaust chimney; stack; flue
Compound of 気 (ki, 'air, gas') and 筒 (tō, 'tube, cylinder'), referring to a tube where gas (fuel-air mixture) is compressed and ignited.