Control of clutchless vehicle electronic shift transmissions operating as bi-directional power transfer devices
Controlled clutchless shifting of multi-ratio geared electronic shift transmissions coupled directly to the electrical prime mover of a vehicle are disclosed. The adaptive control of electrically shifted manual transmissions incorporated into power-split series electric hybrid heavy vehicles operating over heavy duty drive cycles utilizes a direct coupling assembly that enables bi-directional energy transfer and power transport. An electronic shift transmission provides power amplifying or de-amplifying bi-directional intelligently controlled valve or pathway for available terrain potential or kinetic energy of a rolling mass of a vehicle, while retaining the original function of a transmission by increasing or decreasing mechanical rotating energy of the propulsion power to the rear wheels of a vehicle.
1. A vehicle power transfer system comprising:
an electric drive motor;
an electric power controller comprising an artificial intelligence AI controlled multi-channel power divider and a variable frequency drive structured and arranged to selectively feed electrical current from the variable frequency drive to the electric drive motor and receive electrical current from the electric drive motor;
an electric generator connected to the multi-channel power divider of the electric power controller;
at least one battery connected to the multi-channel power divider of the electric power controller;
an electronic shift transmission; and
a direct coupling assembly between an output drive shaft of the electric drive motor and an input drive shaft of the electronic shift transmission structured and arranged to transfer torque from the output drive shaft of the electric drive motor to the input drive shaft of the electronic shift transmission in a drive mode, and to transfer torque from the input drive shaft of the electronic shift transmission to the output drive shaft of the electric drive motor in an energy collection mode.
2. The vehicle power transfer system of claim 1 , wherein the energy collection mode is generated by kinetic energy from a rolling mass of the vehicle that is transferred from wheels of the vehicle through the electronic shift transmission, the direct coupling assembly and the electric drive motor to provide regenerative power to the system.
3. The vehicle power transfer system of claim 1 , wherein in the energy collection mode electric current transferred from the electric drive motor to the electric power controller is selectively supplied to the at least one battery.
4. The vehicle power transfer system of claim 1 , wherein the electronic shift transmission comprises multiple gears that are selectively engaged during the energy collection mode.
5. The vehicle power transfer system of claim 4 , wherein a higher gear ratio is selected during the energy collection mode when the at least one battery is more fully charged, and a lower gear ratio is selected during the energy collection mode when the at least one battery is less fully charged.
6. The vehicle power transfer system of claim 1 , wherein the direct coupling assembly comprises:
a first coupling hub drivingly connected to the output drive shaft of the electric drive motor;
a second coupling hub drivingly connected to the input drive shaft of the electronic shift transmission; and
a connecting spring contacting the first and second coupling hubs.
7. The vehicle power transfer system of claim 6 , wherein the first and second coupling hubs comprise opposing first and second sets of gear teeth, and the connecting spring engages the first and second sets of gear teeth.
8. The vehicle power transfer system of claim 7 , wherein the connecting spring comprises at least one section comprising a strip of material formed into a generally serpentine shape structured and arranged to engage the first and second sets of gear teeth.
9. The vehicle power transfer system of claim 8 , wherein the connecting spring comprises spring steel.
10. The vehicle power transfer system of claim 8 , wherein the strip of material of the connecting spring has a width of from 0.25 to 0.75 inch and a thickness of from 0.0625 to 0.1875 inch.
11. The vehicle power transfer system of claim 8 , wherein the connecting spring comprises two of the sections, and each section has a generally hemispherical cross-sectional shape.
12. The vehicle power transfer system of claim 8 , further comprising a split housing covering the first and second sets of gear teeth and the connecting spring.
13. A direct coupling assembly for use in a vehicle power train assembly, the direct coupling assembly comprising:
a first coupling hub structured and arranged for driving connection to an output shaft of an electric drive motor;
a second coupling hub structured and arranged for driving connection to an input drive shaft of an electronic shift transmission; and
a connecting spring contacting the first and second coupling hubs structured and arranged to transfer torque from the first coupling hub to the second coupling hub in a drive mode, and to transfer torque from the second coupling hub to the first coupling hub in an energy collection mode.
14. The direct coupling assembly of claim 13 , wherein the first and second coupling hubs comprise opposing first and second sets of gear teeth, and the connecting spring engages the first and second sets of gear teeth.
15. The direct coupling assembly of claim 14 , wherein the connecting spring comprises at least one section comprising a strip of material formed into a generally serpentine shape structured and arranged to engage the first and second sets of gear teeth.
16. The direct coupling assembly of claim 15 , wherein the connecting spring comprises spring steel.
17. The direct coupling assembly of claim 15 , wherein the strip of material of the connecting spring has a width of from 0.25 to 0.75 inch and a thickness of from 0.0625 to 0.1875 inch.
18. The direct coupling assembly of claim 15 , wherein the connecting spring comprises two of the sections, and each section has a generally hemispherical cross-sectional shape.
19. The direct coupling assembly of claim 15 , further comprising a split housing covering the first and second sets of gear teeth and the connecting spring.
20. A vehicle power transfer system comprising:
an electric drive motor;
an electric power controller structured and arranged to selectively feed electrical current to the electric drive motor and receive electrical current from the electric drive motor;
an electric generator connected to the electric power controller;
at least one battery connected to the electric power controller;
an electronic shift transmission; and
a direct coupling assembly between an output drive shaft of the electric drive motor and an input drive shaft of the electronic shift transmission structured and arranged to transfer torque from the output drive shaft of the electric drive motor to the input drive shaft of the electronic shift transmission in a drive mode, and to transfer torque from the input drive shaft of the electronic shift transmission to the output drive shaft of the electric drive motor in an energy collection mode, wherein the direct coupling assembly comprises:
a first coupling hub drivingly connected to the output drive shaft of the electric drive motor;
a second coupling hub drivingly connected to the input drive shaft of the electronic shift transmission; and
a connecting spring contacting the first and second coupling hubs.