Patent ID: 7080510

Claim:
An exhaust gas sealing system for a turbocharger comprising: a control valve for controlling a flow of an exhaust gas in a turbine housing; a shaft rotatably disposed within a bearing portion formed on the turbine housing and extending to an outside of the turbine housing through the bearing portion, one end of the shaft being fixed to the control valve; a sealing member for sealing the bearing portion and the shaft and including a through-hole through which the shaft loosely extends and forming a gap with the shaft smaller than a gap formed between the bearing portion and the shaft, wherein one side of the sealing member is biased by a biasing member provided on the other side of the sealing member and pressed against a sealing face formed on a side of the bearing portion close to the outside of the turbine housing; and a first bottomed cylinder member including a first bottom portion through which the shaft loosely extends and a first cylinder portion which is formed on an outer periphery of the first bottom portion and accommodates therein a sealing portion at which the sealing member and the sealing face are pressed against each other.