Patent ID: 8359859

Claim:
A turbocharger device in an engine system comprising: at least one exhaust turbine turbocharger that has a turbine section driven by exhaust gas guided from an engine unit and a compressor section driven by the turbine section so as to pump ambient air to the engine unit, and that is constantly set in an operating mode when the engine unit is in operation; at least one hybrid exhaust turbine turbocharger that has a hybrid turbine section driven by the exhaust gas guided from the engine unit, a hybrid compressor section driven by the hybrid turbine section so as to pump the ambient air to the engine unit, and a generator having a rotation shaft coupled to a rotation shaft of the hybrid turbine section and the hybrid compressor section, and that is set to operate in parallel with the exhaust turbine turbocharger when the engine unit is in operation; and a controller that receives a signal from a rotation sensor that is attached to the exhaust turbine turbocharger and that detects the rotation speed of the exhaust turbine turbocharger, gives a command signal to the generator of the hybrid exhaust turbine turbocharger in accordance with the signal, and controls an amount of electricity to be generated by the generator so that the rotation speed of the hybrid exhaust turbine turbocharger matches the rotation speed of the exhaust turbine turbocharger.