Patent ID: 8231491
Filing Date: 2012-07-31
Classification: B60K,B60L,F16H,Y02T,Y10T

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 designed to input and output power; a second motor designed to input and output power; a power distribution integration mechanism constructed to have a first element connecting with a rotating shaft of the first motor, a second element connecting with a rotating shaft of the second motor, and a third element connecting with an engine shaft of the internal combustion engine and to allow differential rotations of the three elements; and a speed change-transmission assembly including: a power transmission mechanism configured to connect one of the first element and the second element of the power distribution integration mechanism with the driveshaft and to transmit power from the connected one of the first element and the second element to the driveshaft at a preset speed ratio; and a fixed speed ratio setting mechanism configured to, when one of the first element and the second element is connected with the driveshaft by the power transmission mechanism, connect the other of the first element and the second element with the driveshaft and to transmit power from the internal combustion engine to the driveshaft at a constant or fixed speed ratio, wherein the speed change-transmission assembly is a parallel shaft-type transmission including: a first speed change mechanism having at least one parallel shaft-type gear train arranged to connect one of the first element and the second element of the power distribution integration mechanism with the driveshaft; and a second speed change mechanism having at least one parallel shaft-type gear train arranged to connect the other of the first element and the second element with the driveshaft, wherein the power transmission mechanism is equivalent to one of the first speed change mechanism and the second speed change mechanism, and wherein the fixed speed ratio setting mechanism is a parallel shaft-type gear train that is included in the other of the first speed change mechanism and the second speed change mechanism and is not used alone to set a speed ratio.