US 11,752,876 B2
Method and device for controlling regenerative braking of hybrid commercial vehicle
Do Sun Choi, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Motors Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Motors Corporation, Seoul (KR)
Filed on Oct. 19, 2020, as Appl. No. 17/74,000.
Claims priority of application No. 10-2019-0162858 (KR), filed on Dec. 9, 2019.
Prior Publication US 2021/0170877 A1, Jun. 10, 2021
Int. Cl. B60L 7/18 (2006.01); B60L 7/26 (2006.01)
CPC B60L 7/18 (2013.01) [B60L 7/26 (2013.01); B60L 2240/12 (2013.01); B60L 2240/14 (2013.01); B60L 2240/26 (2013.01); B60L 2250/26 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for controlling regenerative braking of a hybrid commercial vehicle that includes a main brake and an auxiliary brake, comprising:
determining, by a controller, whether a braking request condition of the vehicle is satisfied based on a state data;
generating, by the controller, a request braking amount based on the state data when the braking request condition is satisfied;
determining, by the controller, whether an operation switch of the auxiliary brake is on;
generating, by the controller, an auxiliary braking amount of the auxiliary brake in response to determining that the operation switch is on;
generating, by the controller, a final braking amount based on the request braking amount and the auxiliary braking amount;
generating, by the controller, a regenerative braking amount based on the final braking amount;
performing, by the controller, braking of the vehicle based on the final braking amount;
checking by the controller, a hydraulic braking amount based on the final braking amount and the regenerative braking amount;
wherein performing the braking of the vehicle includes:
operating, by the controller, the main brake based on the hydraulic braking amount to perform the braking of the vehicle; and
performing, by the controller, regenerative braking of the vehicle based on the regenerative braking amount;
generating, by the controller, a reference value using the final braking amount and a design coefficient after the braking of the vehicle is performed;
checking, by the controller, the hydraulic braking amount of the main brake when the main brake is operated;
determining, by the controller, whether the hydraulic braking amount of the main brake is less than or equal to the reference value; and
performing, by the controller, the braking of the vehicle using the auxiliary brake in response to determining that the hydraulic braking amount of the main brake is less than or equal to the reference value.