Exhaust valve for internal combustion engines

F - Mech Eng,Light,Heat,Weapons – 01 – L

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F01L 3/16 (2006.01)

Patent

CA 2302348

An exhaust valve for internal combustion engines comprises a cylindrical valve stem (1) with a longitudinal cooling duct (2), and a circular, substantially disc-shaped head (3) securely connected to the valve stem (1), the head (3) having at least one cooling duct (4) which extends from the bottom (5) of the valve stem's cooling duct (2) to an outlet (6) on the head's surface (7), in order to conduct coolant through the valve stem (1), through the head (3) to exhaust gases from the engine. In the valve stem's cooling duct (2) there is inserted a cross section-reducing insert (8).

La présente invention concerne une soupape d'échappement pour moteurs à combustion interne. Cette soupape comporte une queue de soupape cylindrique (1) pourvue d'un conduit longitudinal de refroidissement. Elle comporte également une tête de soupape (3) circulaire, sensiblement en forme de disque, assujettie à demeure à la queue (1). La tête (3) est pourvue d'au moins un conduit de refroidissement (4) qui part du bas (5) du conduit de refroidissement (2) de la queue de soupape, et débouche par un orifice (6) sur la surface (7) de la tête. Ce conduit de refroidissement est conçu de façon à conduire un agent refroidissant au travers de la queue de soupape (1), via la tête (3), de façon à évacuer des gaz du moteur. Un insert (8) monté dans le conduit de refroidissement (2) de la queue de soupape vient réduire la lumière du conduit.

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