Engine power delivery system with transmission gearing bypass

Patent metadata

Field	Value
Publication number	US-10807459-B2
Application number	US-201816160265-A
Country	US
Kind code	B2
Filing date	Oct 15, 2018
Priority date	Oct 15, 2018
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

An engine power delivery system provides bifurcated power-flow with transmission bypass. An engine power delivery system includes an engine that has an output element. A transmission has an input shaft coupled with the engine output element, wherein the engine is configured to generate more power than the transmission is capable of handling. A multi-speed gearing arrangement is included in the transmission and is coupled to the input shaft. An output shaft is coupled with the gearing arrangement and a vehicle axle is coupled with the output shaft to be driven thereby. A generator is configured to be intermittently driven by the engine. A motor is configured to receive electric power from the generator and to drive the vehicle axle without the transmission exceeding the maximum power rating.

First claim

What is claimed is:

1. An engine power delivery system comprising:
an engine having an output element;
a transmission having a maximum power rating and having a first shaft coupled with the engine output element, wherein the engine is configured to generate a maximum power level that is greater than the maximum power rating of the transmission;
a gearing arrangement in the transmission coupled with the first shaft and configured to produce multiple speed ratios;
a second shaft coupled with the gearing arrangement;
a vehicle axle coupled with the second shaft and configured to be driven thereby;
a generator configured to be intermittently driven by the engine to generate electric power; and
a motor configured to receive the electric power from the generator and to drive the vehicle axle;
wherein the transmission and the motor are configured to combine to drive the vehicle axle up to the maximum power level without the transmission exceeding the maximum power rating.

2. The system of claim 1 , further comprising a third shaft configured to be driven by the first shaft bypassing the gearing arrangement; wherein the generator is configured to couple with, and be driven by, the third shaft.

3. The system of claim 2 , further comprising:
a power take-off driveline configured to couple with the third shaft; and
a gearset coupling the generator with the power take-off driveline.

4. The system of claim 3 , further comprising a power take-off unit coupled with the power take-off driveline.

5. The system of claim 3 , wherein the gearset is configured to selectively disengage the generator from the power take-off driveline.

6. The system of claim 2 , wherein the third shaft is configured to be directly driven by the first shaft and at a common speed therewith.

7. The system of claim 6 , wherein the first shaft and the third shaft are contiguous with one another.

8. The system of claim 2 , wherein the engine is configured to supply power to the vehicle axle through the transmission and the second shaft, and simultaneously to the vehicle axle through the third shaft and the motor.

9. The system of claim 1 , further comprising a second axle coupled with the transmission and driven together with the vehicle axle; wherein the motor is configured to drive both axles together.

10. The system of claim 1 , further comprising a gearbox coupled between the motor and the axle; wherein the gearbox includes:
an output gear configured to drive the axle;
an input gear driven by the motor;
a first shaft carrying first and second gears;
a second shaft carrying third, fourth gears and fifth gears; and
a chain linking the fifth gear and the output gear;
wherein the gearbox is configured to alternatively mesh the first gear with the third gears or the second gear with the fourth gear.

11. An engine power delivery system comprising:
an engine driving a first shaft;
a transmission coupled with the first shaft;
a gearing arrangement in the transmission configured to be driven by the first shaft, and configured to produce multiple speed ratios;
a second shaft coupled with the gearing arrangement and configured to be driven at a variety of output ratios relative to the first shaft;
a vehicle axle coupled with the second shaft and configured to be driven thereby;
a third shaft configured to be driven directly by the first shaft at a common speed therewith;
a generator configured to be intermittently driven to generate electric power by the third shaft; and
a motor electrically coupled with the generator and configured to receive electric power from the generator to drive the vehicle axle.

12. The system of claim 11 , further comprising:
a power take-off driveline configured to couple with the third shaft; and
a gearset coupling the generator with the power take-off driveline.

13. The system of claim 12 , further comprising a power take-off unit coupled with the power take-off driveline, the power take-off unit configured to deliver engine power to accessories.

14. The system of claim 12 , wherein the gearset is configured to selectively disengage the generator from the power take-off driveline.

15. The system of claim 11 , further comprising:
an axle housing, within which at least a portion of the vehicle axle is housed;
a gear arrangement coupled between the motor and the vehicle axle; and
a gear housing within which the gear arrangement is housed;
wherein the gear housing is fixed to the axle housing.

16. The system of claim 11 , further comprising a second axle coupled with the transmission and driven together with the vehicle axle; wherein the motor is configured to drive both axles together.

17. The system of claim 11 , wherein the engine is configured to supply power to the vehicle axle at a first level through the transmission and the second shaft, and simultaneously at a second level to the axle through the third shaft and the motor, so that the axle receives a total power from the engine equal to a sum of the first and second levels.

18. The system of claim 11 , further comprising:
a gearbox including a gear arrangement and coupled between the motor and the vehicle axle; and
a propulsion shaft coupled between the gearbox and the vehicle axle and configured to drive the vehicle axle;
wherein the gearbox includes:
an output gear carried by the propulsion shaft;
an input gear fixed to the motor and driven thereby;
a first shaft carrying first and second gears;
a second shaft spaced apart from the first shaft and carrying third, fourth gears and fifth gears;
a chain linking the fifth gear and the output gear; and
an actuator configured to alternatively effect meshing of the first gear with the third gear, or of the second gear with the fourth gear to provide two speed ratios through the gearbox.

19. A power delivery system for a work vehicle comprising:
an internal combustion engine;
a first propulsion shaft configured to be driven by the engine;
a transmission having a transmission housing and an input shaft coupled with the first propulsion shaft, the input shaft extending into the housing;
a gearing arrangement configured to deliver multiple speed ratios and disposed in the transmission housing, the gearing arrangement coupled with the input shaft within the transmission housing;
a front axle configured to be driven by the engine through the transmission;
a second propulsion shaft coupling the front axle with the transmission;
a rear axle configured to be driven by the engine through the transmission;
a third propulsion shaft coupling the rear axle with the transmission;
a gearset;
a fourth propulsion shaft coupling the gearset with the transmission;
a generator coupled with the gearset and configured to be intermittently driven to produce electric power thereby;
a motor electrically coupled with the generator; and
a gearbox through which the second propulsion shaft extends;
wherein the motor is configured to drive the front and rear axles through the gearbox.

Assignees

• Deere & Co

Inventors

• Kreis Edwin R
• Patil Mahendra
• Lubben Jeffrey

Classifications

• Y02T10/62

  Hybrid vehicles · CPC title

• B60K6/48 Primary

  Parallel type · CPC title

• F16H3/30

  with driving and driven shafts not coaxial · CPC title

• B60W20/10

  Controlling the power contribution of each of the prime movers to meet required power demand · CPC title

• B60W10/06

  including control of combustion engines · CPC title