MULTI-MODE HYBRID TRANSMISSION USING SINGLE PLANETARY GEAR

摘要

A transmission includes a single planetary gearset, a first torque machine, an output member and a two-speed gearset that is coupled to the drive member. The single planetary gearset includes a sun gear, a carrier gearset and a ring gear, wherein the carrier gearset is rotatably couplable to the input member and rotatably couplable to the output member, the sun gear is rotatably coupled to a rotor of the first torque machine, and the ring gear is rotatably couplable to the input member and rotatably couplable to the output member. The output member is rotatably couplable to the two-speed gearset, which is configured to operate in one of a first gear ratio and a second gear ratio.

主权项

1. A transmission for transferring mechanical power between an input member and a drive member, the transmission comprising:
a single planetary gearset, a first torque machine, an output member and a two-speed gearset that is coupled to the drive member; the single planetary gearset including a sun gear, a carrier gearset and a ring gear, wherein the carrier gearset is rotatably couplable to the input member and rotatably couplable to the output member, the sun gear is rotatably coupled to a rotor of the first torque machine, and the ring gear is rotatably couplable to the input member and rotatably couplable to the output member; and the output member rotatably couplable to the two-speed gearset, wherein the two-speed gearset is configured to operate in one of a first gear ratio and a second gear ratio; wherein the transmission operates at a first final drive ratio to transfer power between the input member, the drive member and the first torque machine by coupling the input member to the ring gear, coupling the output member to the carrier gearset, and operating the two-speed output gearset at the first gear ratio; and wherein the transmission operates at a second final drive ratio to transfer power between the input member, the drive member and the first torque machine by coupling the input member to the carrier gearset, coupling the output member to the ring gear, and operating the two-speed output gearset at the second gear ratio.