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US 10,647,193 B2Granted
Multi-mode power trains
AssigneeDeere & Company
InventorsKyle K. McKinzie, Reginald M. Bindl
Life of this patent
Estimating the term…
Abstract
A power train and related vehicle provides multi-mode power transmission. A first continuously variable power source (“CVP”) may convert rotational power received by the engine for transmission to a second CVP. A variator assembly may receive rotational power from the second CVP at a first input and directly from the engine at a second input. A control assembly may allow the power train to shift between multiple modes, such as a series mode, a split-path mode, and a direct mode. The control assembly may provide seamless shifting between at least two of these modes.
Claims19
A work vehicle comprising:
- an engine;
- a continuously variable power source (CVP);
- a variator that is operably connected to the engine and the CVP;
- an output shaft that is operably connected to the variator;
- and
- a control assembly including a plurality of transmission components configured to provide selection between a first mode, a second mode, and a third mode;
- the control assembly, in the first mode, configured to transfer CVP power from the CVP to the output shaft and prevent direct transmission of engine power from the engine to the output shaft;
- the control assembly, in the second mode, configured to transfer engine power from the engine to the variator, transfer CVP power from the CVP to the variator, and transfer a combination of engine power and CVP power from the variator to the output shaft;
- and
- the control assembly, in the third mode, configured to transfer engine power from the engine to the output shaft without transmission of CVP power from the CVP to the output shaft;
- and
- the control assembly configured to provide at least one seamless shift between two of the first mode, the second mode, and the third mode;
- wherein the CVP, in the first mode, is configured to supply first CVP power and rotatably drive a first variator component of a planetary gearset of the variator;
- wherein the CVP, in the first mode, is configured to supply second CVP power to and rotatably drive a second variator component of the planetary gearset;
- and
- wherein a third variator component of the planetary gearset, in the first mode, is configured to output recombined CVP power to rotatably drive the output shaft.
13 more elements
A work vehicle comprising:
- an engine;
- a continuously variable power source (CVP);
- a variator that is operably connected to the engine and the CVP;
- an output shaft that is operably connected to the variator;
- and
- a control assembly including a plurality of transmission components configured to provide selection between a first mode and a second mode, the control assembly configured to provide at least one seamless shift between the first mode and the second mode;
- the control assembly, in the first mode, configured to transfer CVP power from the CVP to the output shaft and prevent direct transmission of engine power from the engine to the output shaft;
- the control assembly, in the second mode, configured to transfer engine power from the engine to the variator, transfer CVP power from the CVP to the variator, and transfer a combination of engine power and CVP power from the variator to the output shaft;
- the CVP, in the first mode, is configured to supply first CVP power and rotatably drive a first variator component of a planetary gearset of the variator;
- wherein the CVP, in the first mode, is configured to supply second CVP power to and rotatably drive a second variator component of the planetary gearset;
- wherein a third variator component of the planetary gearset, in the first mode, is configured to output recombined CVP power to rotatably drive the output shaft.
8 more elements
Dependencies are inferred from the claim text.