combustion chamber

US /kəmˈbʌs.tʃən ˌtʃeɪm.bər/
UK /kəmˈbʌs.tʃən ˌtʃeɪm.bər/
"combustion chamber" picture
1.

an enclosed space in which a fuel is burned, especially in an engine or furnace

:
The fuel ignites in the combustion chamber.
Engine performance is directly related to the efficiency of the combustion chamber.