The invention relates to an electric auxiliary engaging and disengaging type
power turbine composite
supercharger, and belongs to the field of vehicle
motive power machines. According to a motor external scheme, a motor
dynamo acts as an auxiliary motor to be arranged outside the
supercharger, motor energy is transmitted to a rotor shaft of the
supercharger through a gear box, and an engaging anddisengaging device can be controlled to engage the gear box with the rotor shaft and disengage the gear box from the rotor shaft according to different working conditions; and under a high-speed working condition of the motor
dynamo, surplus energy of the rotor shaft can drive the motor
dynamo to generate
electricity through the gear box. With such motor external scheme, the influence on an
electronic component of the motor dynamo by high temperature is avoided effectively, and efficient distribution and utilization of energy of the supercharger is realized; and the
turbine end of the supercharger is connected with a
power turbine in series, and secondary
exhaust gas subjected to work by a
turbine of the supercharger drives the
power turbine, so that the motor dynamo is driven to generateelectricity for
energy storage, the utilization ratio of energy of the
exhaust gas is raised, and the economy of the motor dynamo is improved.