JP2013540948A5 - - Google Patents

Claims (14)

An exhaust gas muffler structure (1) for an internal combustion engine, in particular a generator,
In the apparatus including a front muffler (VSD) and a rear muffler (NSD), the front muffler (VSD) and the rear muffler (NSD) are disposed in a common housing (2), and the front muffler (VSD) ) Is disposed in the first chamber (3) of the housing (2), the rear muffler (NSD) is disposed in the second chamber (4), and the two chambers (3, 4) are separated from the separation wall (9). The exhaust gas muffler structure (1), wherein the separation wall (9) includes at least one heat insulation .   2. The exhaust gas muffler structure (1) according to claim 1, wherein the two chambers (3, 4) are arranged in a sandwich shape in the vertical or horizontal direction. Before SL separation wall (9) is a sandwich-like structure having at least three layers, particularly preferably two separate plates (9a, 9b) claims insulating mat (9c) is arranged between The exhaust gas muffler structure (1) according to 1 or 2.   The housing wall (8) of the housing (2) separating the housing (2) from the surrounding environment comprises a step heat, preferably the housing wall (8) has a sandwich-like structure comprising at least three layers. Particularly preferably, it comprises a heat insulating layer (8c) arranged between the metal inner wall (8a) and preferably the metal outer wall (8b) of the housing wall (8). The exhaust gas muffler structure (1) according to any one of the above. The exhaust muffler structure (1) according to claim 4, wherein the metal outer wall (8b) of the housing wall (8) is preferably made of at least a single layer of stainless steel foil embossed with a spherical dome.   The exhaust muffler structure (1) according to any one of claims 1 to 5, wherein the front muffler (VSD) is configured as a reflective muffler (10).   The exhaust muffler according to any one of claims 1 to 6, wherein the rear muffler (NSD) has at least two, preferably three, more preferably four resonator chambers R1, R2, R3, R4. Structure (1).   Preferably, at least one exhaust gas aftertreatment device (6) formed by at least one catalytic converter unit (5a, 5b) is arranged upstream of the front muffler (VSD) in the housing (2). The exhaust gas muffler structure (1) according to any one of claims 1 to 7.   The exhaust gas muffler structure (1) according to claim 8, wherein the housing (2) has at least one closable attachment opening (15) for attachment and removal of the exhaust gas aftertreatment device (6).   10. Exhaust gas muffler structure (1) according to any one of the preceding claims, wherein the housing (2) is constructed in one piece with at least one preferably flexible exhaust pipe and / or an exhaust manifold (7). .   11. Exhaust gas muffler according to claim 10, wherein the exhaust pipe and / or the exhaust manifold (7) have a heat insulating part, preferably formed by a sandwich-like structure, preferably comprising a heat insulating layer arranged between two metal layers. Structure (1).   The fluid connection between the two chambers (3, 4) is formed by a connecting tube (16) displaceable in a displacement sheet (17), preferably perpendicular to the separating wall (9). The exhaust gas muffler structure (1) according to any one of 1 to 11.   The housing (2) comprises an upper shell (2a) and a lower shell (2b), and the upper shell (2a) and the lower shell (2b) are preferably parallel to the separation wall (9). The exhaust gas muffler structure (1) according to any one of claims 1 to 12, wherein the exhaust gas muffler structure (1) is welded to each other in a region of a separate separation surface (ε). The exhaust gas muffler structure (1) according to any one of the preceding claims, wherein the metal inner wall (8a) of the housing (2) has at least one half shell, preferably made of sheet metal.