Combustion chamber wall and combustion chamber assembly for a heating device in a vehicle and process for their production

Abstract

A combustion chamber wall for a combustion chamber assembly ( 100 ) of a heating device ( 1 ) in a vehicle is arranged to form a combustion chamber ( 8 ). It comprises a cylindrical circumferential wall ( 44 ), which defines a central axis (C) extending in the axial direction (X). At least one structure ( 22 ) for introducing an oxidizer into the combustion chamber ( 8 ) is formed in the circumferential wall ( 44 ). The structure comprises a cutout recess ( 52 ) formed in the circumferential wall, which forms an introduction opening, and a worked section ( 54 ) formed in the circumferential wall ( 44 ), which is deformed in a radial direction (R) towards the central axis (C). In a circumferential direction (P) of the circumferential wall ( 44 ), the cutout recess ( 52 ) directly adjoins the worked section ( 52 ) which is deformed towards the central axis (C).

1 . A combustion chamber wall for a combustion chamber assembly of a heater in a vehicle, the combustion chamber wall being configured to define a combustion chamber comprising:
 a cylindrical circumferential wall, which defines a central axis extending in the axial direction;   wherein at least one structure for introducing an oxidizer into the combustion chamber is formed in the circumferential wall, the structure comprising:   a cutout recess formed in the circumferential wall, which forms an inlet opening; and   a worked section formed in the circumferential wall, which is deformed in a radial direction inwards towards the central axis;   wherein the cutout recess adjacently adjoins the worked section, that is deformed towards the central axis, in a circumferential direction of the circumferential wall.   
     
     
         2 . The combustion chamber wall according to  claim 1 , wherein the cutout recess is defined by first and second edge sections which are opposite one another and spaced apart from one another in the circumferential direction;
 the second edge portion is part of the worked section of the circumferential wall deformed towards the central axis; and   the first edge section has a greater distance from the central axis than the second edge section.   
     
     
         3 . The combustion chamber wall according to  claim 1 , wherein the inlet opening forms an opening surface with a surface normal corresponding to a flow vector of the oxidizer passing through the inlet opening; and
 the surface normal has a radial component in the radial direction in relation to the central axis of the circumferential wall and a tangential component in the circumferential direction configured to generate a swirl in the combustion chamber in the event of an oxidizer flow introduced through the inlet opening.   
     
     
         4 . The combustion chamber wall according to  claim 1 , wherein at least two of the structures for introducing an oxidizer into the combustion chamber are arranged in the circumferential wall. 
     
     
         5 . The combustion chamber wall according to  claim 4 , wherein the structures for introducing an oxidizer into the combustion chamber:
 are arranged in the circumferential wall at an equal distance from a base section to be connected at an end face to the circumferential wall or a surface of an evaporator arranged therein; and/or   are arranged consecutively in the circumferential wall in the circumferential direction at equal distances from one another.   
     
     
         6 . The combustion chamber wall according to  claim 1 , wherein the circumferential wall is formed of a metal; and
 the worked section of the circumferential wall is formed by deep drawing in the radial direction toward the central axis.   
     
     
         7 . The combustion chamber wall according to  claim 1 , wherein
 the cutout recess is formed by punching or cutting out and removing a first section from the circumferential wall.   
     
     
         8 . The combustion chamber wall according to  claim 1 , wherein the combustion chamber is connected via the inlet opening to an oxidizer supply chamber surrounding the circumferential wall or to an oxidizer supply channel. 
     
     
         9 . The combustion chamber wall according to  claim 1 , wherein the worked section has a convexly curved shape which terminates in the circumferential direction by the second edge section. 
     
     
         10 . The combustion chamber wall according to  claim 1 , wherein the worked section is substantially symmetrical with respect to an axis extending in the tangential direction and has a first length along this axis up to the second edge section, which is greater than a second length of the cutout recess between the first edge section and the second edge section along this axis. 
     
     
         11 . The combustion chamber wall according to  claim 1 , wherein the worked section has a drawing depth with respect to the radial direction caused by a deformation process, which results in a radially outwardly facing surface of the forming portion adjacent to the second edge portion being positioned closer to the central axis by a difference in respective distances than a radially inwardly facing surface of the circumferential wall adjacent to the first edge portion. 
     
     
         12 . The combustion chamber wall according to  claim 11 , wherein the difference in respective distances is less than a second length of the cutout recess between the first edge section and the second edge section along an axis extending in the tangential direction. 
     
     
         13 . The combustion chamber wall according to  claim 1 , wherein
 in addition, a region of the circumferential wall adjacent to the first edge portion is deformed towards the central axis in the radial direction; and/or   a plurality of radially directed inlet openings, which are smaller in relation to the cutout recess, are formed in the circumferential wall for introducing the oxidizer.   
     
     
         14 . The combustion chamber assembly comprising the combustion chamber wall according to  claim 1 , further comprising a base section, wherein the base section and the cylindrical circumferential wall form a combustion chamber housing and define the combustion chamber therein, and wherein the base section is adapted to supply a fuel to the combustion chamber. 
     
     
         15 . A heating device for a vehicle, comprising the combustion chamber assembly according to  claim 14 . 
     
     
         16 . A method of manufacturing a combustion chamber wall according to  claim 1 , comprising:
 providing a circumferential wall;   punching or cutting out a first section from the material of the circumferential wall to form the cutout recess;   working a second section in the material of the circumferential wall to form the worked section, whereby the cutout recess adjacently adjoins the worked section.   
     
     
         17 . The combustion chamber wall according to  claim 4 , wherein four of the structures for introducing an oxidizer into the combustion chamber are arranged in the circumferential wall. 
     
     
         18 . The combustion chamber wall according to  claim 6 , wherein the metal, comprises a steel sheet comprising a steel alloy. 
     
     
         19 . The method of  claim 16 , wherein the step of working comprises deep drawing a second section in the material of the circumferential wall.