Patent ID: 7806795
Filing Date: 2010-10-05
Classification: B60K,F16H,Y02T

Abstract:
1. A power output apparatus configured to output power to a driveshaft, the power output apparatus comprising: an internal combustion engine; a first motor capable power input and power output; a second motor capable power input and power output; an accumulator configured to transmit electric power to and from the first motor and the second motor; a power distribution integration mechanism being a double pinion planetary gear mechanism including a carrier as a first element connecting with a rotating shaft of the first motor, a sun gear as a second element connecting with a rotating shaft of the second motor, a ring gear as a third element connecting with an engine shaft of the internal combustion engine, and sets of two pinion gears engaging with each other, one of the two pinion gears engaging with the ring gear and the other of the two pinion gears engaging with the sun gear, and configured to allow mutually differential rotations of the three elements and to have a gear ratio of approximately 0.5; and a change speed transmission assembly including: a first change speed planetary gear mechanism having an input element connecting with the first element of the power distribution integration mechanism, an output element connecting with the driveshaft, and a fixable element and configured to allow mutually differential rotations of the three elements; a first fixation device configured to fix the fixable element of the first change speed planetary gear mechanism in a non-rotatable manner and to release the fixable element in a rotatable manner; a second change speed planetary gear mechanism having an input element connecting with the second element of the power distribution integration mechanism, an output element connecting with the driveshaft, and a fixable element and configured to allow mutually differential rotations of the three elements; and a transmission state changeover device configured to change over a state of either one of the input element and the fixable element of the second change speed planetary gear mechanism and thereby enable and disable power transmission via the second change speed planetary gear mechanism, the change speed transmission assembly including a coupling device configured to couple and decouple the output element with and from the fixable element of the first change speed planetary gear mechanism, the fixable element of the second change speed planetary gear mechanism being fixed in the non-rotatable manner, the transmission state changeover device being a coupling-decoupling device configured to couple and decouple the second element of the power distribution integration mechanism with and from the input element of the second change speed planetary gear mechanism.