IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0089184
(2005-10-14)
|
등록번호 |
US-8347998
(2013-01-08)
|
국제출원번호 |
PCT/SE2005/001539
(2005-10-14)
|
§371/§102 date |
20080403
(20080403)
|
국제공개번호 |
WO2007/043924
(2007-04-19)
|
발명자
/ 주소 |
- Ericson, Hans
- Unnebäck, Joakim
- Carlsson, Sven-Åke
- Filla, Reno
|
출원인 / 주소 |
- Volvo Construction Equipment AB
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
23 |
초록
▼
A working machine including an internal combustion engine for supplying torque to the driving wheels of the working machine, and a transmission line arranged between the internal combustion engine and the driving wheels for transmitting torque from the internal combustion engine to the driving wheel
A working machine including an internal combustion engine for supplying torque to the driving wheels of the working machine, and a transmission line arranged between the internal combustion engine and the driving wheels for transmitting torque from the internal combustion engine to the driving wheels. The working machine further including at least one hydraulic pump in a hydraulic system for moving an implement arranged on the working machine and/or steering the working machine. The transmission line includes at least one electric machine for driving or braking the driving wheels, and/or for generating electric power for the at least one hydraulic pump.
대표청구항
▼
1. A working machine comprising an internal combustion engine for supplying torque to driving wheels of the working machine,a transmission line arranged between the internal combustion engine and the driving wheels for transmitting torque from the internal combustion engine to the driving wheels, an
1. A working machine comprising an internal combustion engine for supplying torque to driving wheels of the working machine,a transmission line arranged between the internal combustion engine and the driving wheels for transmitting torque from the internal combustion engine to the driving wheels, andat least a first and a second hydraulic pump in a hydraulic system for at least one of moving an implement arranged on the working machine and steering the working machine,wherein the transmission line comprises at least a first electric machine and a second electric machine, each for at least one of driving the driving wheels and braking the driving wheels and also for generating electric power for the at least first and second hydraulic pumps,wherein the transmission line comprises a transmission unit for engagement and disengagement of the internal combustion engine relative to the driving wheels,wherein the first electric machine is arranged between the internal combustion engine and the transmission unit,wherein the second electric machine is arranged between the transmission unit and the driving wheels and the second electric machine is arranged between the transmission unit and a gearbox,wherein the first and second electric machines are electrically connected to an electric enemy storage means,wherein the first hydraulic pump is exclusively powered by a first electric motor, and the second hydraulic pump is exclusively powered by a second electric motor, andwherein the first and second electric motors are electrically connected to at least one of the first and second electric machines and the electric energy storare means. 2. A working machine according to claim 1, wherein the working machine comprises at least one electric machine for each driving wheel. 3. A working machine according to claim 2, wherein the transmission unit is a hydrodynamic torque converter. 4. A working machine according to claim 3, wherein the hydrodynamic torque convener has a lock-up function where a transmission ratio of the torque converter is fixed. 5. A working machine according to claim 1, wherein the transmission unit is a mechanical clutch. 6. A working machine according to claim 5, wherein the transmission unit is a hydrodynamic torque converter, and wherein the hydrodynamic torque converter has a lock-up function where a transmission ratio of the torque converter is fixed, and wherein the working machine comprises a plurality of electric machines, and at least two of the electric machines are electrically connected to each other for transmitting torque from the internal combustion engine to the driving wheels via the at least two electric machines. 7. A working machine according to claim 1, wherein the electric energy storage means is arranged to provide energy to the at least one hydraulic pump. 8. A working machine according to claim 1, wherein the electric energy storage means is arranged to provide energy to at least one of the first and second electric machines. 9. A working machine according to claim 7, wherein at least one of the first and second electric machines is arranged to charge the electric energy storage means when the at least one of the first and second electric machines functions as a generator. 10. A working machine according to claim 1, wherein at least one of the first and second electric machines is arranged to brake the driving wheels of the working machine during a brake operation of the working machine. 11. A working machine according to claim 1, wherein at least one of the first and second electric machines is arranged to drive the driving wheels of the working machine during operation of the implement or during acceleration of the working machine. 12. A working machine according to claim 1, wherein at least one of the first and second electric machines is arranged to facilitate coupling or decoupling of a direct operation state of the transmission unit by adapting the rotation speed of the internal combustion engine and the rotation speed of the transmission line to each other. 13. A working machine according to claim 1, wherein the working machine is a wheel loader. 14. A working machine according to claim 1, wherein the working machine performs at least one implement function and at least one steering function, and at least one hydraulic pump is arranged for each function. 15. A working machine according to claim 14, wherein the working machine comprises three hydraulic pumps, a first hydraulic pump being arranged to provide a lifting and lowering function of the implement, a second hydraulic pump being arranged to provide a tilting function of the implement, and a third hydraulic pump being arranged to provide the steering function of the working machine. 16. A method for operating a working machine having an internal combustion engine for supplying torque to the driving wheels of the working machine, and a transmission line arranged between the internal combustion engine and the driving wheels for transmitting torque front the internal combustion engine to the driving wheels, the working machine further comprising at least a first and a second hydraulic pump in a hydraulic system for moving an implement arranged on the working machine and/or steering the working machine, comprising using at least one of a first and a second electric, machine in the transmission line to at least one of drive the driving wheels and brake the driving wheels and also to generate electric power for the at least one hydraulic pump,using a transmission unit in the transmission line for engagement and disengagement of the internal combustion engine relative to the driving wheels,using at least the second electric machine arranged between the transmission unit and the driving wheels and between the transmission unit and a gearbox and driving the driving wheels by the second electric machine, the second electric machine being electrically powered by at least the first electric machine in the transmission line and an electric energy storage means of the wheel loader, the first electric machine being arranged between the internal combustion engine and the transmission,exclusively driving the first hydraulic by a first electric motor and exclusively driving the second hydraulic pump by a second electric motor, anddriving the first and second electric motors via an electrical connection to at least one of the first and second electric machines and the electric energy storage means. 17. A method according to claim 16, comprising driving the driving wheels by the first electric machine via the transmission unit. 18. A method according to claim 16, comprising driving the driving wheels of the working machine by at least one of the first and second electric machines during at least one of operation of the implement and acceleration of the working machine. 19. A method according to claim 16, comprising using at least one of the first and second electric machines for braking the driving wheels of the working machine during a brake operation of the working machine, and for recuperation of energy during the brake operation. 20. A method according to claim 16, comprising driving the driving wheels while using a hydrodynamic torque converter as a transmission unit. 21. A method according to claim 20, comprising driving the driving wheels during a lock-up state of the hydrodynamic torque converter. 22. A method according to claim 16, comprising using at least one of the first and second electric machines for driving the driving wheels in either of a clockwise or counterclockwise direction. 23. A method according to claim 16, wherein the first and second electric motors are each directly electrically connected to at least one of the first and second electric machines and the electric energy storage means, the method comprising driving the first and second electric motors via a direct electrical connection to any one of the first and second electric machines and the electric energy storage means. 24. A working machine according to claim 1, wherein the first and second electric motors are each directly electrically connected to at least one of the first and second electric machines and the electric energy storage means.
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