Patent ID: 7281530

Claim:
A supercharging system for the internal combustion engine, comprising: an exhaust introduction passage for introducing exhaust gas from an internal combustion engine; an exhaust discharge passage for receiving the exhaust gas from the exhaust introduction passage and exhausting the exhaust gas to an exterior; a mixture part arranged between the exhaust introduction passage and the exhaust discharge passage, for changing internal pressure into negative pressure upon accelerating flowing velocity of the exhaust gas with a narrowed flowing passage set to have a smaller diameter than that of the exhaust introduction passage; an absorption passage for mixing outside air and the exhaust gas inside the mixture part upon introducing the outside air with use of the negative pressure into an inside of the mixture part; an intake passage for taking out and returning a part of mixed gas mixed inside the mixture part to the internal combustion engine; and a formation length of the mixture part being adjustable such that the exhaust introduction passage and the exhaust discharge passage are movable relative one another in a direction coming close to or separating from each other.