초록 ▼

A power output apparatus includes a planetary gear having a planetary carrier, a sun gear, and a ring gear. A crankshaft of an engine is mechanically linked with the planetary carrier, a first motor with the sun gear, and a second motor with the ring gear. A controller drives the second motor with e

A power output apparatus includes a planetary gear having a planetary carrier, a sun gear, and a ring gear. A crankshaft of an engine is mechanically linked with the planetary carrier, a first motor with the sun gear, and a second motor with the ring gear. A controller drives the second motor with electric power regenerated by the first motor or drives the first motor with electric power regenerated by the second motor, based on a gear ratio of the sun gear to the ring gear of the planetary gear, thereby enabling the power output from the engine to be converted to a desired power and output to a power transmission gear mechanically connected with the ring gear. The engine may be driven at any driving point that can output energy identical with the energy output to the ring gear. This structure allows the engine to be driven at a desired driving point of highest possible efficiency, thereby enhancing the efficiency of the whole apparatus.

대표청구항 ▼

[ What is claimed is:] [3.] A power output apparatus for outputting power to a drive shaft, said power output apparatus comprising:an engine having an output shaft;a first motor having a rotating shaft, said first motor inputting and outputting power to and from said rotating shaft;a second motor in

[ What is claimed is:] [3.] A power output apparatus for outputting power to a drive shaft, said power output apparatus comprising:an engine having an output shaft;a first motor having a rotating shaft, said first motor inputting and outputting power to and from said rotating shaft;a second motor inputting and outputting power to and from said drive shaft;a three shaft-type power input/output means having three shafts respectively linked with said drive shaft, including said output shaft and said rotating shaft as two shafts of said three shafts, when powers are input to and output from any two shafts among said three shafts, said power input/output means inputting and outputting power, which is determined according to the input and output powers, to and from a residual one shaft of said three shafts;target power setting means for setting a target power to be output to said drive shaft;engine operation control means for controlling operation of said engine, based on the target power set by said target power setting means and an operating condition setting unit that specifies an operating condition of the engine which enables the engine to operate with the highest possible engine efficiency, based on a predetermined relationship between operating condition and engine efficiency; andpower control for driving and controlling said first motor and said second motor, in order to enable power output from said engine to be subjected to torque conversion by said three shaft-type power input/output means, said first motor, and said second motor and to be output to said drive shaft, wherein said power control means includes means for driving and controlling said first motor, in order to enable part of the power output from said engine to be regenerated as electric power by said first motor via said three shaft-type power input/output means and means for driving and controlling said second motor, in order to enable power to be output from said second motor to said drive shaft by utilizing the electric power regenerated by said first motor.