Apparatus and method for controlling torque intervention of hybrid vehicle

Patent metadata

Field	Value
Publication number	US-10017173-B2
Application number	US-201615375769-A
Country	US
Kind code	B2
Filing date	Dec 12, 2016
Priority date	Sep 5, 2016
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

An apparatus for controlling a torque intervention of a hybrid vehicle includes a driving information detector for detecting a torque intervention request of the hybrid vehicle, and a controller for deriving a target motor torque and a target engine torque depending on a required torque variation when the torque intervention is requested, the target motor torque being derived so that a high voltage battery does not deviate from a state of charge (SOC) charging and discharging limit, the target motor torque limiting the target engine torque to be equal to or less than a target engine torque before the intervention request to obtain a final engine torque, and the target motor torque correcting the target motor torque to a final motor torque depending on the final engine torque.

First claim

What is claimed is:

1. An apparatus for controlling a torque intervention of a hybrid vehicle, comprising:
a driving information detector for detecting a torque intervention request of the hybrid vehicle; and
a controller for deriving a target motor torque and a target engine torque depending on a required torque variation when the torque intervention is requested, the target motor torque being derived so that a high voltage battery does not deviate from a state of charge (SOC) charging and discharging limit, the target motor torque limiting the target engine torque to be equal to or less than a target engine torque before the intervention request to obtain a final engine torque, and the target motor torque correcting the target motor torque to a final motor torque depending on the final engine torque.

2. The apparatus of claim 1 , wherein the controller limits the SOC charging and discharging limit of the high voltage battery to be a first set torque when the SOC of the high voltage battery is equal to or less than a first reference value and limits the SOC charging and discharging limit to be a second set torque when the SOC of the high voltage battery is equal to or greater than a second reference value.

3. The apparatus of claim 1 , wherein the controller calculates a difference of a torque variation from the target motor torque before the intervention to derive the target motor torque, wherein a calculation of the target motor torque depends on the SOC charging and discharging limit of the high voltage battery.

4. The apparatus of claim 3 , wherein the torque variation is a difference value of a transmission input torque from an intervention requested torque.

5. The apparatus of claim 1 , wherein the controller obtains the target engine torque by calculating a difference of the target motor torque from an intervention requested torque.

6. The apparatus of claim 1 , wherein the final motor torque is obtained by calculating a difference of the final engine torque from a sum of the target motor torque and the target engine torque.

7. The apparatus of claim 1 , wherein the controller limits the final motor torque to be within a range from a minimum output motor torque to a maximum output motor torque.

8. A method for controlling a torque intervention of a hybrid vehicle, the method comprising:
detecting, by a driving information detector, a torque intervention request of the hybrid vehicle;
deriving, by a controller, a target motor torque and a target engine torque depending on a required torque variation when the torque intervention is requested, the target motor torque being derived so that a high voltage battery does not deviate from an SOC charging and discharging limit;
obtaining, by the controller, a final engine torque by limiting the target engine torque to be equal to or less than the target engine torque before the intervention request; and
correcting, by the controller, the target motor torque to a final motor torque depending on the final engine torque.

9. The method of claim 8 , wherein the controller limits the SOC charging and discharging limit of the high voltage battery to be a first set torque when the SOC of the high voltage battery is equal to or less than a first reference value and limits the SOC charging and discharging limit to be a second set torque when the SOC of the high voltage battery is equal to or greater than a second reference value.

10. The method of claim 8 , wherein the controller calculates a difference of a torque variation from the target motor torque before the intervention to derive the target motor torque, in a calculation of the target motor torque depending on the SOC charging and discharging limit of the high voltage battery.

11. The method of claim 10 , wherein the torque variation is a difference value of a transmission input torque from an intervention requested torque.

12. The method of claim 8 , wherein the controller obtains the target engine torque by calculating a difference of the target motor torque from an intervention requested torque.

13. The method of claim 8 , wherein the final motor torque is obtained by calculating a difference of the final engine torque from a sum of the target motor torque and the target engine torque.

14. The method of claim 8 , wherein the controller limits the final motor torque to be within a range from a minimum output motor torque to a maximum output motor torque.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kim Sang Joon
• Du Gwang Il
• Cho Teh Hwan
• Kang Ji Hoon
• Park Seong Ik

Classifications

• B60Y2200/92

  Hybrid vehicles · CPC title

• B60W2710/083

  Torque · CPC title

• B60W2710/0666

  Engine torque · CPC title

• B60W2510/083

  Torque · CPC title

• B60W2510/0657

  Engine torque · CPC title