Integrated starter-generator device with power transmission
AssigneeDeere & Company
InventorsSteven R. Fliearman, Christopher D. Turner, John N. Oenick, Tony J. Huegerich
Life of this patent
Estimating the term…
Abstract
A combination engine starter and electric power generator device for a work vehicle has an electric machine and a gear set mounted to the electric machine. The gear set is configured to receive rotational input from the electric machine and from the work vehicle engine. The gear set mechanically couples the electric machine and the engine in first and second power flow directions in which in the first power flow direction the gear set effects a first gear ratio and in the second power flow direction the gear set effects a second gear ratio.
Claims14
A combination engine starter and power generator device for a work vehicle having an engine, the device comprising:
- an electric machine;
- a gear set mounted to the electric machine and configured to receive rotational input from the electric machine and from the engine and to mechanically couple the electric machine and the engine in first and second power flow directions in which in the first power flow direction the gear set effects a first gear ratio and in the second power flow direction the gear set effects a second gear ratio, wherein the gear set includes a planetary gear set having a sun gear and a carrier for one or more planet gears and includes a drive gear coupled for co-rotation with the carrier;
- a first one-way clutch that is engaged when the gear set moves in the first power flow direction and is disengaged when the gear set moves in the second power flow direction;
- and
- a second one-way clutch that is engaged when the gear set moves in the second power flow direction and is disengaged when the gear set moves in the first power flow direction;
- wherein the first clutch is disposed between the carrier and the drive gear and the second clutch is disposed between the sun gear and the drive gear.
A combination engine starter and electric power generator device for a work vehicle having an engine, the device comprising:
- a housing;
- an electric machine at least in part contained in the housing;
- and
- a transmission at least in part contained in the housing, the transmission including:
- a gear set configured to receive rotational input from the electric machine and from the engine and mechanically couple the electric machine and the engine in first and second power flow directions in which in the first power flow direction the gear set effects a first gear ratio and in the second power flow direction the gear set effects a second gear ratio, wherein the gear set includes a planetary gear set having a sun gear and a carrier for one or more planet gears;
- and
- a clutch assembly mechanically coupled to the gear set, the clutch assembly including:
- a first one-way clutch that is engaged when the gear set moves in the first power flow direction and is disengaged when the gear set moves in the second power flow direction;
- and
- a second one-way clutch that is engaged when the gear set moves in the second power flow direction and is disengaged when the gear set moves in the first power flow direction;
- wherein the gear set further includes a drive gear coupled for co-rotation with the carrier;
- and
- wherein the first one-way clutch is disposed between the carrier and the drive gear and the second one-way clutch is disposed between the sun gear and the drive gear.
A drivetrain assembly for a work vehicle, comprising:
- an engine;
- and
- a combination starter and generator device, the device including:
- an electric machine;
- a gear set mounted to the electric machine and configured to receive rotational input from the electric machine and from the engine and to mechanically couple the electric machine and the engine in first and second power flow directions in which in the first power flow direction the gear set effects a first gear ratio and in the second power flow direction the gear set effects a second gear ratio, wherein the gear set includes a planetary gear set having a sun gear and a carrier for one or more planet gears;
- a first one-way clutch that is engaged when the gear set moves in the first power flow direction and is disengaged when the gear set moves in the second power flow direction;
- and
- a second one-way clutch that is engaged when the gear set moves in the second power flow direction and is disengaged when the gear set moves in the first power flow direction;
- wherein the gear set further includes a drive gear coupled for co-rotation with the carrier;
- and
- wherein the first one-way clutch is disposed between the carrier and the drive gear and the second one-way clutch is disposed between the sun gear and the drive gear.
Dependencies are inferred from the claim text.