Burner for an Exhaust Gas System of an Internal Combustion Engine, in Particular of a Motor Vehicle, and Internal Combustion Engine, in Particular for a Motor Vehicle

A burner (18) for an exhaust gas system (10) of an internal combustion engine, comprising:

• a combustion chamber (22) formed by a chamber element (20), wherein in the combustion chamber (22) a mixture which comprises air as a first fluid and a fuel as a second fluid is ignitable and combustible, whereby a component of the exhaust gas system (10) and/or exhaust gas of the internal combustion engine that is flowable through the exhaust gas system (10) is heatable;
• a channel (42) through which at least one of the first fluid and the second fluid is flowable, wherein the channel (42) opens into the combustion chamber (22) and wherein via the channel (42) the at least one of the first fluid and the second fluid is introducible into the combustion chamber (22);
• and
• a closure element (52) which is moveable relative to the chamber element (20) between a closed position(S) fluidically separating the channel (42) from the combustion chamber (22) and a release position (F) fluidically connecting the channel (42) to the combustion chamber (22);
• wherein the chamber element (20) has a recess (54) in which the closure element (52) is at least partially received in the release position (F).