초록 ▼

A mean vehicle speed Va and a mean variation .DELTA.Va are factors reflecting a current driving condition and an expected driving condition of a vehicle, which relate to a charge-discharge amount of a battery. A target state SOC* of the battery is calculated from the mean vehicle speed Va and the me

A mean vehicle speed Va and a mean variation .DELTA.Va are factors reflecting a current driving condition and an expected driving condition of a vehicle, which relate to a charge-discharge amount of a battery. A target state SOC* of the battery is calculated from the mean vehicle speed Va and the mean variation .DELTA.Va. The charge-discharge amount of the battery increases with an increase in mean vehicle speed Va and mean variation .DELTA.Va. The lower charging state of the battery results in the higher charge-discharge efficiency. The structure of the present invention sets the target state SOC* of the battery and controls the actual state of the battery to the target state SOC*, thereby enhancing the charge-discharge efficiency of the battery and ensuring a sufficient supply of electric power required for driving the vehicle.

대표청구항 ▼

[ What is claimed is:] [1.] A power output apparatus mounted on a vehicle for outputting power to a drive shaft, said power output apparatus comprising:a motor for outputting power to said drive shaft;an engine to output mechanical power, said motor converting at least a portion of the mechanical po

[ What is claimed is:] [1.] A power output apparatus mounted on a vehicle for outputting power to a drive shaft, said power output apparatus comprising:a motor for outputting power to said drive shaft;an engine to output mechanical power, said motor converting at least a portion of the mechanical power output by the engine to mechanical energy as the power output to the drive shaft;a generator for converting at least part of said mechanical power output from said engine to electrical energy, the generator regenerating a portion of the mechanical power output from the engine while the motor is outputting power to the drive shaft;accumulator means being charged with the electrical energy converted by said generator and being discharged to supply electrical energy required for driving said motor;state detection means for detecting a state of said accumulator means;driving condition predicting means for predicting a driving condition of said vehicle at various positions, including predicted positions, of a route;target state setting means for setting a target state of said accumulator means based on the predicted driving condition, said target state set at each of the various positions, including the predicted positions along the route while driving; andcharge-discharge control means for controlling said engine and said generator to enable the state of said accumulator means to become equal to said target state.