A turbocharger , comprising: a turbine comprising a scroll passage comprising at least a first portion near a beginning of the scroll passage and a second portion near an end of the scroll passage , a gas outlet extending axially from the scroll passage , a turbine wheel comprising one or more blades disposed in the gas outlet , and means for establishing a bypass flow from the first portion into the second portion of the scroll passage , wherein the means for establishing the bypass flow comprises a nozzle ring arranged between the scroll passage and the gas outlet , the nozzle ring comprising a plurality of vanes adapted to direct a flow of gas from the scroll passage against the one or more blades of the turbine wheel in the gas outlet , wherein the nozzle ring comprises at least one vane of the plurality of vanes being a sealing vane that seals the first portion of the scroll passage from the second portion of the scroll passage , and means for moving the sealing vane relative to the scroll passage to establish a bypass flow from the first portion of the scroll passage into the second portion of the scroll passage , wherein the means for moving the sealing vane comprise means for moving the nozzle ring relative to the scroll passage , and wherein the sealing vane is adapted to be moved relative to the scroll passage by moving the nozzle ring relative to the scroll passage , thereby opening a bypass or passage from the first portion into the second portion of the scroll passage . a turbine comprising a scroll passage comprising at least a first portion near a beginning of the scroll passage and a second portion near an end of the scroll passage , a gas outlet extending axially from the scroll passage , a turbine wheel comprising one or more blades disposed in the gas outlet , and means for establishing a bypass flow from the first portion into the a scroll passage comprising at least a first portion near a beginning of the scroll passage and a second portion near an end of the scroll passage , a gas outlet extending axially from the scroll passage , a turbine wheel comprising one or more blades disposed in the gas outlet , and means for establishing a bypass flow from the first portion into the second portion of the scroll passage , wherein the means for establishing the bypass flow comprises a nozzle ring arranged between the scroll passage and the gas outlet , the nozzle ring comprising a plurality of vanes adapted to direct a flow of gas from the scroll passage against the one or more blades of the turbine wheel in the gas outlet , wherein the nozzle ring comprises at least one vane of the plurality of vanes being a sealing vane that seals the first portion of the scroll passage from the second portion of the scroll passage , and means for moving the sealing vane relative to the scroll passage to establish a bypass flow from the first portion of the scroll passage into the second portion of the scroll passage , wherein the means for moving the sealing vane comprise means for moving the nozzle ring relative to the scroll passage , and wherein the sealing vane is adapted to be moved relative to the scroll passage by moving the nozzle ring relative to the scroll passage , thereby opening a bypass or passage from the first portion into the second portion of the scroll passage . <EOS>