Patent ID: 11913528
Assignee: DEERE & COMPANY
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC F

Claim 16:
17. A work vehicle powertrain comprising:
an engine configured to generate rotational engine power through an engine shaft and
a multi-mode continuously variable transmission (CVT) comprising:
a continuously variable power source (CVP) generating CVP power, wherein the CVP includes a first continuously variable machine (CVM) and a second CVM in which the first CVM and the second CVM are electric machines;
an input arrangement having an input shaft couplable to the engine shaft to receive the engine power and rotate about an input axis, the input shaft supporting one or more clutch components about the input axis;
a variator arrangement having a variator shaft rotating about a variator axis and supporting a planetary set and one or more clutch components about the variator axis;
a drop set arrangement having a drop set shaft rotating about a drop set axis and supporting one or more clutch components about the drop set axis; and
an output arrangement having an output shaft rotating about an output axis and supporting one or more output components about the output shaft;
wherein the input arrangement, the variator arrangement and the drop set arrangement provide a selective gear reduction for transmission of an output power according to a plurality of transmission modes in which:
(a) in a CVP-only mode:
a clutch of the input arrangement transmits the CVP power to the planetary set of the variator arrangement;
a clutch of the variator arrangement decouples the engine power from the planetary set of the variator arrangement;
a clutch of the drop set arrangement transmits the CVP power to the output arrangement; and

the output arrangement outputs the CVP power as the output power; and
(b) in a split-path mode:
a clutch of the input arrangement transmits the CVP power to the planetary set of the variator arrangement;
a clutch of the variator arrangement transmits the engine power to the planetary set of the variator arrangement where the planetary set combines the CVP power and the engine power;
a clutch of the drop set arrangement transmits the combined CVP and engine power to the output arrangement; and
the output arrangement outputs the combined CVP and engine power as the output power; and

a pump drive arrangement including:
a first pump drive assembly having a first hydraulic pump and a first drive gear, the first hydraulic pump being mounted to a first pump pad of the transmission housing and the first drive gear being coupled to the input shaft to receive engine power from the engine to drive the first hydraulic pump;
a second pump drive assembly including a second hydraulic pump and a second drive gear, the second hydraulic pump being mounted to a second pump pad of the transmission housing and the second drive gear being coupled to the input shaft to receive engine power from the engine to drive the second hydraulic pump; and
a third pump drive assembly including a third pump mounted within the transmission housing and driven by the second drive gear.