Exhaust manifold for engine

Details Exhaust manifold for engine Exhaust manifold for engine

F - Mech Eng,Light,Heat,Weapons

01

N

F01N 13/10 (2010.01) F01N 13/00 (2010.01)

Patent

CA 2209839

An exhaust manifold for an engine includes a manifold body 7 having a plurality of branch pipes and a common collecting chamber integrally connected to the branch pipes and communicating with an exhaust emission control device is divided into an upper half and a lower half at a boundary face extending in a direction of arrangement of the branch pipes. The upper and lower halves are made of steel plates and welded to each other. In the exhaust manifold, a welding mating coupler is formed by outer edges of the upper and lower halves, and a welding stepped superposing coupler is formed by inner edges of the upper and lower halves. Thus, during welding, it is possible to limit the misalignment of the upper and lower halves in a direction along the boundary face and the misalignment of the upper and lower halves in a direction perpendicular to the boundary face by cooperation of the mating coupler and the stepped superposing coupler. In addition, because the stepped superposing coupler is used for coupling of inner edges of the upper and lower halves to each other, it is possible to ensure sufficient clearances between the adjacent branch pipes, and to easily conduct the operation of mounting of the exhaust manifold to the engine by utilizing the clearances.

Cette invention concerne un collecteur d'échappement de moteur comportant un corps 7 portant plusieurs tubulures de raccordement et comprenant un volume commun de réception moulé à même et raccordé à un dispositif épurateur d'échappement. Le collecteur est divisé en deux moitiés, une supérieure et une inférieure, le long de l'axe longitudinal des tubulures de raccordement. Les deux moitiés sont des plaques d'acier façonnées et soudées ensemble. Les deux moitiés du collecteur d'échappement présentent sur leurs rives extérieures un guide d'assemblage pour le soudage et sur leurs rives intérieures un profil d'assemblage à gradins conjugués. Ainsi, en cours de soudage, il est possible de limiter le désalignement longitudinal et transversal des deux moitiés grâce à l'interaction combinée des deux profils de guidage. De plus, les profils à gradins conjugués étant réalisés sur les rives intérieures des deux moitiés, il est possible de réaliser un espacement suffisant des tubulures de raccordement pour faciliter le montage du collecteur sur le moteur.

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