Vehicle power transmission apparatus

A vehicle power transmission apparatus comprising:

• a belt type stepless speed change device for use with a vehicle for providing a driving force from a prime motor to a driven wheel operatively connected to said vehicle;
• and
• a control circuit operatively connected to said prime motor, said control circuit receiving a signal representative of rotational speed of an output shaft of said prime motor, a signal representative of a potentiometer operatively connected to an accelerator of the vehicle, a signal representative of a magnet positioning of a rotor of said prime motor and a signal representative of the current flowing through said rotor, said control circuit including means for determining output power of said prime motor, storage means for storing a predetermined characteristic table based on motor revolutions vs. power output and comparison means for comparing said output power with power output determined by said predetermined characteristic table in said storage means in accordance with rotational speed of an output shaft of said prime motor for producing modulated pulses for controlling said prime motor for providing a discrete substantially constant flat power characteristic segment covering at least a portion of the power output relative to the revolutions of said prime motor.