IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0626489
(2012-09-25)
|
등록번호 |
US-8845483
(2014-09-30)
|
발명자
/ 주소 |
- Sujan, Vivek Anand
- Books, Martin T.
- Djan-Sampson, Patrick O.
- Muralidhar, Praveen
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
45 |
초록
▼
A system includes a hybrid power train including an engine, a first electrical torque provider, and a second electrical torque provider. The system further includes a load mechanically coupled to the hybrid power train. The hybrid power train further includes a clutch coupled to the engine and the s
A system includes a hybrid power train including an engine, a first electrical torque provider, and a second electrical torque provider. The system further includes a load mechanically coupled to the hybrid power train. The hybrid power train further includes a clutch coupled to the engine and the second electrical torque provider on a first side, and coupled to the first electrical torque provider and the load on a second side. The system further includes an electrical energy storage device electrically coupled to the electrical torque providers. The system further includes a controller that performs operations to smooth torque commands for the engine and the second electrical torque provider in response to determining that a clutch engage-disengage event occurring or imminent.
대표청구항
▼
1. A system comprising: a hybrid power train including an engine, a first electrical torque provider, a second electrical torque provider mechanically coupled to the engine by a first shaft, a load mechanically coupled to the first electrical torque provider by a second shaft, and a clutch mechanica
1. A system comprising: a hybrid power train including an engine, a first electrical torque provider, a second electrical torque provider mechanically coupled to the engine by a first shaft, a load mechanically coupled to the first electrical torque provider by a second shaft, and a clutch mechanically coupling the first and second shafts between the first and second electrical torque providers;an electrical energy storage device electrically coupled to the first electrical torque provider and the second electrical torque provider; anda controller structured to smooth torque commands for the engine and the second electrical torque provider in response to determining that one of a clutch engaging event or a clutch disengaging event is one of occurring or imminent, wherein the controller is further structured to close the clutch in response to determining a speed of the first shaft is within a predetermined speed threshold value of a speed of the second shaft. 2. The system of claim 1, wherein the controller is further structured to implement a time-based hysteresis on each of the clutch engaging event and the clutch disengaging event. 3. The system of claim 1, wherein the controller is further structured to smooth the torque commands by applying one of a rate limiter and a low-pass filter. 4. The system of claim 1, wherein the controller is further structured to smooth the torque commands for the engine and the second electrical torque provider, wherein the smoothing occurs with a time constant that is fast relative to a highly transient operator torque request. 5. The system of claim 4, wherein the controller is further structured to smooth the torque commands by applying one of a rate limiter and a low-pass filter. 6. The system of claim 1, wherein the controller is further structured to provide a zero torque command to the second electrical torque provider during the clutch engaging event. 7. The system of claim 1, wherein the controller is further structured to provide a zero torque command to the second electrical torque provider during the clutch disengaging event. 8. The system of claim 1, wherein the controller is further structured to operate a closed loop controller on a position of the clutch, wherein a clutch position error value is determined in response to a difference between the speed of the first shaft and the speed of the second shaft. 9. The system of claim 8, wherein the closed loop controller includes an integral error term. 10. A method comprising: operating an engine, a first electrical torque provider, and a second electrical torque provider mechanically coupled to the engine by a first shaft, with a load mechanically coupled to the first electrical torque provider by a second shaft, and a clutch mechanically coupling the first shaft and the second shaft between the first and second electrical torque providers;determining that one of a clutch engaging event or a clutch disengaging event is one of occurring or imminent;in response to each of the clutch engaging event and the clutch disengaging event, smoothing a torque command for each of the engine and the second electrical torque provider; andwherein the smoothing includes applying one of a rate limiter and a low-pass filter. 11. The method of claim 10, further comprising implementing a time-based hysteresis on each of the clutch engaging event and the clutch disengaging event. 12. The method of claim 10, further comprising performing the smoothing by applying the low-pass filter having a time constant that is fast relative to a highly transient operator torque request. 13. The method of claim 12, wherein the time constant is faster than 500 ms. 14. The method of claim 10, further comprising providing a zero torque command to the second electrical torque provider during the clutch engaging event. 15. The method of claim 10, further comprising providing a zero torque command to the second electrical torque provider during the clutch disengaging event. 16. The method of claim 10, further comprising determining a speed of the first shaft, determining a speed of the second shaft, and closing the clutch in response to determining the speed of the first shaft is within a predetermined speed threshold value of the speed of the second shaft. 17. The method of claim 10, further comprising determining a speed of the first shaft, determining a speed of the second shaft, determining a clutch position error value in response to a difference between the speed of the first shaft and the speed of the second shaft, and operating a closed loop controller on a position of the clutch in response to the clutch position error value. 18. The system of claim 17, wherein the closed loop controller includes an integral error term. 19. A method comprising: operating an engine, a first electrical torque provider, and a second electrical torque provider mechanically coupled to the engine by a first shaft, with a load mechanically coupled to the first electrical torque provider by a second shaft, and a clutch mechanically coupling the first shaft and the second shaft between the first and second electrical torque providers;determining that a clutch engaging event is occurring;in response to the clutch engaging event, smoothing a torque command for the engine and for the second electrical torque provider; anddetermining a speed of the first shaft coupling the clutch to the engine and the second electrical torque provider, determining a speed of the second shaft coupling the clutch to the first electrical torque provider and the load, determining a clutch position error value in response to a difference between the speed of the first shaft and the speed of the second shaft, and operating a closed loop controller on a position of the clutch in response to the clutch position error value. 20. The method of claim 19, wherein the closed loop controller includes an integral error term. 21. The method of claim 19, further comprising providing a zero torque command to the second electrical torque provider during the clutch engaging event.
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