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

Claim 5:
6. A multi-mode continuously variable transmission (CVT) for a work vehicle powertrain having an engine rotating an engine shaft to deliver engine power to the CVT, the CVT comprising:
a continuously variable power source (CVP) generating CVP power;
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;
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;

wherein the CVP includes a first continuously variable machine (CVM) and a second CVM; and
wherein the first CVM and the second CVM are electric machines; and
a pump drive arrangement having a hydraulic pump, which is mounted to a pump pad of a transmission housing containing, at least in part, the CVT, and a drive gear coupled to the input shaft to receive engine power from the engine to drive the hydraulic pump.