Heating Device for an Exhaust System of an Internal Combustion Engine

1) A heating device (6) for an exhaust system (1) of an internal combustion engine (2);

• the heating device (6) comprises:
• a tubular body (12), which contains a combustion chamber (7) and is delimited by a first base wall (14) and by a second base wall (15), which are opposite one another;
• a fuel injector (9), which is mounted through the first base wall (14) of the tubular body (12) to inject fuel into the combustion chamber (7) through a fuel outlet hole of its;
• at least one inlet opening (18), which can be connected to a fan (8) to receive an air flow, which is directed to the combustion chamber (7) and gets mixed with the fuel;
• a feeding channel (21), which receives air from the inlet opening (18), surrounds an end portion of the fuel injector (9), ends with a nozzle (22) arranged around an injection point of the fuel injector (9), is delimited, on the outside, by an outer tubular body (24) having an inner surface (26) of the feeding channel (21) and is delimited, on the inside, by an inner tubular body (25), which surrounds the fuel injector (9) and contains, on the inside, the fuel injector (9);
• a spark plug (10), which is mounted through a side wall (16) of the tubular body (12) to trigger the combustion of a mixture of air and fuel;
• and
• a flame holder body (32), which is at least partially arranged inside the feeding channel (21) in the area of the nozzle (22), is coaxial to the feeding channel (21) and to the fuel injector (9) and is in front of the fuel outlet hole of the fuel injector (9) at a distance other than zero from the fuel outlet hole of the fuel injector (9), so that the flame holder body (32) is spaced apart from the fuel outlet hole of the fuel injector (9).