Cylinder head for an internal combustion engine

F - Mech Eng,Light,Heat,Weapons – 02 – B

Patent

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Details

F02B 31/00 (2006.01) F02F 1/42 (2006.01)

Patent

CA 2455850

The invention relates to a cylinder head (1) for an internal combustion engine with at least one inlet channel (3), which generates a swirling flow (S) in the combustion chamber (2), preferably curved in the direction of the swirling flow (S) with an external wall region (3a) and an internal wall region (3b) relative to the swirling flow (S). A valve seat ring (4) is arranged in the region of the opening (9) of the inlet channel (3) into the combustion chamber (2). According to the invention, a strong swirling flow (S) without significant reduction of the flow cross-section of the inlet channel (3) may be achieved whilst keeping the mechanical loading on the cylinder head to a minimum, whereby the external wall region (3a), in the region of the valve seat ring (4), is at least partly formed by a projection (11) of the cylinder head (1) within an internal surface (4a) of the valve seat ring (4), whereby the internal surface (4a) of the valve seat ring (4) extends beyond said projection (11).

Culasse (1) de cylindre pour un moteur à combustion interne, qui comporte au moins un conduit d'admission (3) produisant un écoulement tourbillonnaire (S) dans la chambre de combustion (2), de préférence incurvé dans le sens de l'écoulement tourbillonnaire (S), ledit conduit possédant une zone de paroi externe (3a) et une zone de paroi interne (3b) par rapport à l'écoulement tourbillonnaire (S). Un siège rapporté (4) de soupape est situé dans la zone de l'embouchure (9) du conduit d'admission (3) dans la chambre de combustion (2). Selon la présente invention, il est possible d'obtenir un fort écoulement à tourbillonnaire (S) sans réduction significative de la section transversale d'écoulement du conduit d'admission (3) et de maintenir la sollicitation mécanique de la culasse de cylindre à un niveau aussi faible que possible. A cet effet, la zone de paroi externe (3a) est formée, dans la zone du siège rapporté (4) de soupape, au moins en partie par un prolongement (11) de la culasse (1) de cylindre dans la surface interne (4a) du siège rapporté (4) de soupape, ladite surface interne (4a) du siège rapporté (4) de soupape étant séparée du prolongement (11) par un certain écart.

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