Patent ID: 7930884
Filing Date: 2011-04-26
Classification: F01N,Y10T

Abstract:
1. A manifold for exhaust gases from an internal combustion engine, this manifold comprising upper and lower half-shells ( 18 A, 18 B) which together delimit an exhaust pipe for the gases, and aligned apertures ( 28 ) which are intended to be arranged in the continuation of the exhaust outlets of the engine, the half-shells each having a peripheral edge ( 19 A, 19 B) and being bonded to each other by at least first portions ( 20 A, 20 B) of their peripheral edges ( 19 A, 19 B) which are welded to each other, characterised in that there is at least a centre plane (P) which extends through the apertures ( 28 ) and through which the first portions ( 20 A, 20 B) extend at least twice, and in that the first portions ( 20 A, 20 B) form an alternate arrangement of projections ( 50 ) and recesses ( 52 ) which extend above and below the centre plane (P), respectively.