Output gearing for a dual motor mixed-speed continuous power transmission
An electric powertrain includes a first electric motor that has an uninterrupted connection with a drive shaft of a vehicle. The electric powertrain further includes a second electric motor that has an interruptible connection with the drive shaft. In one form, this interruptible connection includes a clutch. The electric powertrain further includes a first gear train in the form of a first planetary gear and a second gear train in the form of a second planetary gear. The first gear train, second gear train, and clutch are arranged downstream from the first electric motor and second electric motor.
1. A powertrain system, comprising:
an output;
a first electric motor connected to the output;
a second electric motor connected to the output;
at least two planetary gears;
a clutch;
wherein the second electric motor is configured to supply power to the output via the planetary gears and the clutch;
wherein the at least two planetary gears and the clutch are located downstream from the first electric motor and the second electric motor;
wherein the first electric motor and the second electric motor are connected to the output via a three-speed gear train arrangement;
a first gear train connected to the output;
a second sear train connecting the second electric motor to the output; and
wherein the clutch is configured to shift gears in the second gear train.
2. The powertrain system of claim 1 , wherein the first electric motor has an uninterrupted connection to the output and the second electric motor has an interruptible connection to the output.
3. The powertrain system of claim 1 , wherein the second electric motor is connected to the output via a two-speed gear train arrangement.
4. The powertrain system of claim 1 , wherein the first gear train includes a first planetary gear.
5. The powertrain system of claim 4 , wherein the second gear train includes a second planetary gear.
6. The powertrain system of claim 1 , wherein the clutch includes a positive clutch.
7. The powertrain system of claim 6 , wherein the positive clutch includes a dog clutch.
8. The powertrain system of claim 1 , wherein the first gear train, the second gear train, and the clutch are all located between the second electric motor and the output.
9. The powertrain system of claim 8 , wherein the clutch is located between the first gear train and the second gear train.
10. The powertrain system of claim 8 , wherein the clutch is located between the second electric motor and the second gear train.
11. A powertrain system, comprising:
an output;
a first electric motor connected to the output;
a first gear train connected to the output;
a second electric motor connected to the output;
a second gear train connecting the second electric motor to the output;
at least two planetary gears;
a clutch;
wherein the second electric motor is configured to supply power to the output via the at least two planetary gears and the clutch;
wherein the at least two planetary gears and the clutch are located downstream from the first electric motor and the second electric motor;
a third gear train connecting the first electric motor to the output; and
wherein the third gear train is positioned upstream from the first electric motor.
12. The powertrain system of claim 11 , wherein the third gear train includes a third planetary gear.
13. The powertrain system of claim 12 , wherein the third planetary gear includes a sun gear, an inner planet gear engaged with the sun gear, and an outer planet gear engaged to the inner planet gear.
14. The powertrain system of claim 11 , wherein the third gear train includes a second clutch configured to shift gears in the third gear train.
15. The powertrain system of claim 14 , wherein:
the second gear train includes the clutch configured to shift gears in the second gear train; and
at least one of the clutch of the second gear train and the second clutch of the third gear train remain engaged to always provide an uninterrupted connection to the output.
16. A powertrain system, comprising:
an output;
a first electric motor connected to the output;
a second electric motor connected to the output;
at least two planetary gears;
a clutch;
the second electric motor is configured to supply power to the output via the at least two planetary gears and the clutch;
the at least two planetary gears and the clutch are located downstream from the first electric motor and the second electric motor;
a second gear train connects the second electric motor to the output;
wherein the second gear train includes a second planetary gear;
wherein the second gear train includes the clutch configured to shift gears in the second gear train; and
an intermediate gear train connects the second gear train to the second electric motor.
17. A powertrain system, comprising:
an output;
a first electric motor connected to the output and a second electric motor connected to the output;
wherein the first electric motor has an uninterrupted connection to the output and the second electric motor has an interruptible connection to the output;
wherein the first electric motor and the second electric motor are connected to the output via a three-speed gear train arrangement;
a first gear train is connected to the output;
a second gear fain connecting the second electric motor to the output;
third ear train connecting the first electric motor to the output; and
wherein the third gear is positioned upstream from the first electric motor.
18. The powertrain system of claim 17 , wherein:
the second gear train includes a clutch configured to shift gears in the second gear train; and
the first gear train, the second gear train, and the clutch are all located between the second electric motor and the output.
19. The powertrain system of claim 18 , wherein the clutch includes a dog clutch.
20. The powertrain system of claim 18 , wherein the third gear train includes a clutch configured to shift gears in the third gear train.
21. The powertrain system of claim 16 , wherein the clutch includes a dog clutch.
22. A powertrain system, comprising:
an output;
a first electric motor connected to the output;
a first gear train connected to the output;
a second electric motor connected to the output;
a second gear train connecting the second electric motor to the output;
at least two planetary gears;
a clutch;
wherein the second electric motor is configured to supply power to the output via the at least two planetary gears and the clutch;
wherein the at least two planetary gears and the clutch are located downstream from the first electric motor and the second electric motor;
a third gear train connecting the first electric motor to the output;
wherein the third gear train includes a third planetary gear; and
wherein the third planetary gear includes a sun gear, an inner planet gear engaged with the sun gear, and an outer planet gear engaged to the inner planet gear.
23. The powertrain system of claim 22 , wherein the clutch includes a dog clutch.
24. The powertrain system of claim 22 , wherein the third gear train includes a clutch configured to shift gears in the third gear train.
25. A powertrain system, comprising:
an output;
a first electric motor connected to the output;
a first gear train connected to the output;
a second electric motor connected to the output;
a second gear train connecting the second electric motor to the output;
at least two planetary gears;
a clutch;
wherein the second electric motor is configured to supply power to the output via the at least two planetary gears and the clutch;
wherein the at least two planetary gears and the clutch are located downstream from the first electric motor and the second electric motor;
a third gear train connecting the first electric motor to the output; and
wherein the third gear train includes a second clutch configured to shift gears in the third gear train.
26. The powertrain system of claim 25 , wherein the clutch includes a dog clutch.
27. The powertrain system of claim 25 , wherein:
the third gear train includes a third planetary gear; and
the third planetary gear includes a sun gear, an inner planet gear engaged with the sun gear, and
an outer planet gear engaged to the inner planet gear.