U.s. pat. no. 3,386,258 proposes, in particular egr - valve

摘要

Disclosed is a hot-gas valve (10), in particular egr - valve, with a housing (12), in which a gas channel (20) with an inlet (63) and an outlet (64) is formed, and with a valve device (22) for controlling the flow of fluid through the gas channel (20), wherein said housing (12) at least one cooling channel (40) for the fluid cooling of the housing (12), wherein the gas channel (20) by means of a thermal shield (52) with respect to the housing (12) is shielded, which is made of a material which has a greater thermal stability than the material from which the housing (12), wherein said valve means (22) a in the gas channel (20) has the closing body (24), which is located on a by means of at least one bearing (44; 48) in the housing (12) is supported on the side of the valve shaft (42) is held. According to the invention, provided that the bearing (44; 48) from a good heat conducting material, and in that the valve shaft (42) on the of the gas passageway (20), the opposite side of the bearing (44; 48) by an elastomer - shaft seal ring (46; 50) is sealed.