Exhaust line catalyst or muffler shell for motor vehicle and method of producing one such shell
AssigneeFaurecia Systemes D'Echappement
InventorBruno Masoni
Life of this patent
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Abstract
The invention relates to an exhaust line catalyst or muffler shell for a motor vehicle. The inventive shell comprises a tube (8) which is produced by rolling and welding a metal strip (12). At least one of the ends (9, 10) of the aforementioned tube (8) comprises a deformation produced by means of flow turning, such as to define an exhaust gas inlet (4) and/or outlet (5). The weld line (15) which closes the rolled metal strip (12) forms an angle (16) in relation to the axis (17) of the tube (8) at least in the flow turning-shaped segment(s) (13, 14) thereof. The invention also relates to a method of producing one such shell.
Claims3
Muffler or exhaust line catalyst for a motor vehicle, comprising:
- a tube manufactured by rolling and welding a metal strip, said tube having, at one at least of end thereof, a deformation by flospinning forming an inlet and/or an outlet cone for exhaust gases, wherein, at least in a portion of the tube shaped by flospinning, a weld line ensuring closing of a rolled metal strip, forms an angle with respect to an axis of said tube.
Process for manufacturing a muffler or exhaust line catalyst shell for a motor vehicle being comprised of an inlet and/or outlet cone ending through a reduced diameter tube section, said process comprising steps of:
- making a tube by rolling and welding a metal strip into a spiral;
- and
- deforming an end of said tube by flospinning, forming an inlet and/or outlet cone.
Dependencies are inferred from the claim text.