Hydraulic torque converter for minicar

The utility model relates to a hydraulic torque converter for a minicar. The hydraulic torque converter comprises a cover wheel component, a turbine component, a pump wheel component and a guide wheel component. The cover wheel component comprises a cover wheel hub and a cover wheel shell; the turbine component comprises a turbine hub and a turbine body; the pump wheel component comprises a pump wheel hub and a pump wheel body; the guide wheel component comprises a guide wheel body and a guide wheel base; and the diameter Phi D of a circular circle of the hydraulic torque converter is 254 plus or minus 4mm. The average diameters of an inlet and an outlet of a center flow line of each work wheel, the length of an axial surface flow line of the pump wheel body, the length of an axial surface flow line of each work wheel, the inlet angle and the outlet angle of a center flow line of each work wheel blade, the quantity of blades of each work wheel, the inlet point and the outlet point of the axial surface of each work wheel blade, and the like are restricted by the hydraulic torque converter, so that the problems that the existing hydraulic torque converter cannot meet the use requirement of a vehicle for high speed and is not applicable to small and compact installation spaces; and due to the adoption of reasonable parameters of the circular circle and blade grids, a specified capacity is realized and the running efficiency of a finished car is improved.