Output gearing for a dual motor mixed-speed continuous power transmission

Patent metadata

Field	Value
Publication number	US-12085155-B2
Application number	US-202318470766-A
Country	US
Kind code	B2
Filing date	Sep 20, 2023
Priority date	Jun 2, 2020
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

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.

First claim

What is claimed is:

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 clutch includes a one-way clutch;
wherein the second electric motor is configured to supply power to the output via the planetary gears and the clutch; and
wherein the at least two planetary gears and the clutch are located downstream from the first electric motor and the second electric motor.

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 , further comprising:
a first gear train connected to the output.

5. The powertrain system of claim 4 , wherein the first gear train includes a first planetary gear.

6. The powertrain system of claim 5 , wherein:
the first planetary gear includes a sun gear, a ring gear surrounding the sun gear, and one or more planet gears engaged between the sun gear and the ring gear; and
the first planetary gear is configured to reduce output speed of the first electric motor to the output.

7. The powertrain system of claim 4 , further comprising:
a second gear train connects the second electric motor to the output.

8. The powertrain system of claim 7 , wherein the second gear train includes a second planetary gear.

9. The powertrain system of claim 8 , wherein:
the second planetary gear includes a sun gear, a ring gear, and one or more planet gears engaged between the sun gear and the ring gear;
the second planetary gear has a carrier that is coupled to the first gear train; and
the ring gear surrounds the carrier.

10. The powertrain system of claim 9 , further comprising:
a clutch actuator configured to engage and disengage the one-way clutch with the ring gear.

11. The powertrain system of claim 10 , wherein the one-way clutch includes a Selectable One-Way Clutch (SOWC).

12. The powertrain system of claim 10 , further comprising:
a first output shaft connected to the first electric motor;
a second output shaft connected to the second electric motor; and
wherein the first output shaft extends through the second output shaft in a concentric manner.

13. The powertrain system of claim 12 , further comprising:
wherein the carrier has a clutch engagement member;
wherein the second output shaft has a range member; and
a dog clutch configured to connect and disconnect the clutch engagement member and the range member.

14. The powertrain system of claim 7 , wherein the clutch is configured to shift gears in the second gear train.

15. The powertrain system of claim 7 , wherein the first gear train, the second gear train, and the clutch are all located between the second electric motor and the output.

16. The powertrain system of claim 15 , wherein the clutch is located between the first gear train and the second gear train.

17. The powertrain system of claim 15 , wherein the clutch is located between the second electric motor and the second gear train.

18. The powertrain system of claim 1 , wherein the one-way clutch includes a Selectable One-Way Clutch (SOWC).

19. The powertrain system of claim 1 , wherein the first electric motor and the second electric motor are connected to the output via a three-speed gear train arrangement.

Assignees

• Allison Transm Inc

Inventors

• Mcgrew Jr Arthur L
• Mock Isaac
• Pelton George S
• Raszkowski James Allen

Classifications

• F16H2200/2066

  using one freewheel mechanism · CPC title

• F16H2200/2082

  one freewheel mechanisms · CPC title

• F16H2200/2007

  with two sets of orbital gears · CPC title

• F16H2200/2094

  using positive clutches, e.g. dog clutches · CPC title

• F16H2200/2064

  using at least one positive clutch, e.g. dog clutch · CPC title