Power transmission apparatus for hybrid vehicle

摘要

A power transmission apparatus 1 for a hybrid vehicle having an engine 6 and a motor 7 is provided with a planetary gear mechanism 31 configured to differentially rotate a sun gear 32, a carrier 36, and a ring gear 35. The sun gear 32 is connected to one of a first input shaft and a second input shaft and to the motor 7. The ring gear 35 is connected to a lock mechanism capable of stopping a rotation state. The carrier 36 is configured to transmit power to a counter shaft 14. The other of the first input shaft and the second input shaft is configured to transmit power to the counter shaft 14 without passing through the planetary gear mechanism 31.

主权项

1. A power transmission apparatus for a hybrid vehicle having an internal combustion engine and an electric motor, the power transmission apparatus comprising:
an engine-output shaft to which a power is output from the internal combustion engine; a first input shaft arranged in parallel to the engine-output shaft and selectively coupled with the engine-output shaft by a first connection/disconnection unit; a second input shaft arranged in parallel to the engine-output shaft and selectively coupled with the engine-output shaft by a second connection/disconnection unit; an output/input shaft arranged in parallel to the engine-output shaft and configured to output the power to a driven portion; a first gear group arranged on the first input shaft, the first gear group having a plurality of gears selectively coupled with the first input shaft through a first synchronization device; a second gear group arranged on the second input shaft, the second gear group having a plurality of gears selectively coupled with the second input shaft through a second synchronization device; a third gear group arranged on the output/input shaft, the third gear group having a plurality of gears meshed with the gears of the first gear group and the gears of the second gear group; and a differential reduction unit in which a first rotation element, a second rotation element, and a third rotation element are rotatable differentially from each other, wherein the first rotation element is connected to one of the first input shaft and the second input shaft and also connected to the electric motor, the third rotation element is connected to a lock mechanism capable of stopping rotation thereof, the second rotation element is connected to one of the gears of the first gear group arranged on the first input shaft and the gears of the second gear group arranged on the second input shaft to transmit power to the output/input shaft, and the other of the first input shaft and the second input shaft which is not connected to the first rotation element is configured to transmit power to the output/input shaft without passing through the differential reduction unit.