Powertrain system with power take-off (PTO) and reduction planetary gear set
Methods and systems for a powertrain system. The powertrain system includes a first traction motor and a reduction planetary gear set rotationally coupled to the first traction motor. The powertrain system further includes a power take-off (PTO) that is configured to attach to an implement, and an input shaft rotationally coupled to the first traction motor and a transmission, where the reduction planetary gear set has a grounded component.
1 . A powertrain system, comprising:
a first traction motor;
a reduction planetary gear set including:
a sun gear rotationally coupled to the first traction motor; and
a carrier rotationally coupled to a power take-off (PTO) via one or more components that are external to the reduction planetary gear set, wherein the PTO is configured to attach to an implement;
an input shaft rotationally coupled to:
the first traction motor; and
a transmission via a gear;
a second traction motor rotationally coupled to the transmission; and
a transmission disconnect clutch configured to selectively disconnect the first traction motor from the transmission;
wherein the reduction planetary gear set includes a ring gear that is permanently grounded; and
wherein the transmission is rotationally coupled to one or more drive axles.
2 . The powertrain system of claim 1 , further comprising a PTO clutch configured to selectively disconnect the PTO from the reduction planetary gear set.
3 . The powertrain system of claim 2 , further comprising:
a controller including instructions that when executed, during operation of the first traction motor, cause the controller to:
selectively disengage the PTO clutch based on operating conditions.
4 . The powertrain system of claim 2 , wherein the PTO clutch is a friction clutch.
5 . The powertrain system of claim 1 , wherein the implement is a hydraulic pump.
6 . The powertrain system of claim 1 , wherein the reduction planetary gear set is a simple reduction planetary gear set.
7 . The powertrain system of claim 6 , wherein the carrier is rotationally coupled to the PTO via one or more gears and shafts.
8 . The powertrain system of claim 7 , wherein the ring gear is grounded by a transmission housing.
9 . The powertrain system of claim 1 , wherein the transmission is a multi-speed transmission with multiple discrete gears.
10 . A method for operation of a powertrain system, comprising:
selectively disconnecting a power take-off (PTO) from a first traction motor through operation of a PTO clutch; and
selectively disconnecting the first traction motor from the transmission via operation of a transmission disconnect clutch while a second traction motor that is rotationally coupled to the transmission is operational;
wherein the powertrain system includes:
the PTO clutch;
the first traction motor;
the second traction motor;
the transmission disconnect clutch;
a reduction planetary gear set rotationally coupled to the first traction motor and including:
a carrier rotationally coupled to the PTO via one or more components that are external to the reduction planetary gear set, wherein the PTO is configured to attach to an implement; and
a ring gear that is permanently grounded;
wherein the PTO is configured to attach to an implement; and
an input shaft rotationally coupled to the first traction motor and coupled to a transmission via a gear.
11 . An all-electric vehicle (EV) powertrain system, comprising:
a first traction motor;
an input shaft rotationally coupled to the first traction motor and a transmission; and
a reduction planetary gear set including:
a sun gear rotationally coupled to the input shaft;
a carrier rotationally coupled to a power take-off (PTO) clutch via one or more components, wherein the PTO is configured to attach to an implement; and
a ring gear that is permanently grounded;
a second traction motor rotationally coupled to the transmission;
a transmission disconnect clutch configured to selectively disconnect the first traction motor from the transmission; and
a controller including instructions that when executed, during operation of the first traction motor and the second traction motor, cause the controller to:
disengage the transmission disconnect clutch; and
engage the PTO clutch;
wherein the PTO clutch is configured to selectively disconnect the reduction planetary gear set from the PTO which is configured to attach to an implement.
12 . The all-electric EV powertrain system of claim 11 , wherein the PTO clutch is a wet friction clutch.
13 . The all-electric EV powertrain system of claim 11 , wherein the ring gear is grounded by a transmission housing.
14 . The all-electric EV powertrain system of claim 11 , wherein the transmission disconnect clutch is a wet friction clutch.
15 . The all-electric EV powertrain system of claim 11 , wherein the implement is a hydraulic pump.