| 摘要 |
An improved dual mode EPPV transmission hybrid electric drive system uses a combination of power sources including an internal combustion engine, a first electric motor, and a second electric motor, and provides more efficient operation and compact installation. The improved dual mode EPPV transmission hybrid electric drive system includes a first planetary gear set including a first sun gear linked to a first ring gear via a pinion on a first carrier, and a second planetary gear set including a second sun gear linked to a second ring gear via a pinion on a second carrier, wherein the various elements of the planetary gear sets are configured to allow a dual mode synchronous shift operation. The system includes a first clutch and a second clutch, both of which may be dry clutches, for changing the mode of the transmission from a high mode to a low mode and vice versa.
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