| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve energy efficiency and to miniaturize a motor. <P>SOLUTION: A power distribution integrated mechanism 30 composed of three planetary gears P1-P3, a clutch C1, and a brake B1 is connected to an engine 22 and a drive shaft 65 which is connected to two motors MG1 and MG2 and drive wheels 69a and 69b. At normal time, the clutch C1 is turned off while the brake B1 is turned on so that the power distribution integrated mechanism 30 functions as four-element type. If the motor MG2 rotates in opposite direction when the power distribution integrated mechanism 30 is functioned as four-element type, the clutch C1 is turned on and the brake B1 is turned off to rotate the motor MG2 in forward direction. So, the drop in energy efficiency which can be caused by rotating the motor MG2 in the opposite direction is suppressed. By allowing functioning as a four-element type at normal time, the motors MG1 and MG2 are miniaturized when compared with a three-element type. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
