US 11,926,310 B2
Hybrid electric vehicle and method for controlling speed limit for the same
Hui Un Son, Suwon-si (KR); Sang Joon Kim, Seoul (KR); Kyu Hwan Jo, Yongin-si (KR); Sung Bae Jeon, Ansan-Si (KR); Sung Hoon Yu, Hwaseong-si (KR); Joo Young Kim, Hwaseong-si (KR); and Jin Kyeom Cho, Suwon-si (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 Sep. 28, 2020, as Appl. No. 17/034,297.
Claims priority of application No. 10-2019-0167556 (KR), filed on Dec. 16, 2019.
Prior Publication US 2021/0179064 A1, Jun. 17, 2021
Int. Cl. B60W 20/13 (2016.01); B60L 58/12 (2019.01); B60W 30/14 (2006.01); B60W 30/182 (2020.01); B60W 40/105 (2012.01)
CPC B60W 20/13 (2016.01) [B60L 58/12 (2019.02); B60W 30/146 (2013.01); B60W 30/182 (2013.01); B60W 40/105 (2013.01); B60W 2510/1005 (2013.01); B60W 2510/244 (2013.01); B60W 2520/10 (2013.01); B60W 2540/10 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for controlling a speed limit of a hybrid electric vehicle, the method comprising:
determining a virtual vehicle speed as being a lower one of an actual vehicle speed and a target limit speed, wherein the virtual vehicle speed is transmitted to a hybrid control unit;
determining a virtual accelerator position sensor (APS) value as being a larger one of a first APS value and a second APS value, wherein the first APS value corresponds to a constant-speed driving load set to achieve the target limit speed based on load conditions and the second APS value corresponds to the target limit speed;
operating the vehicle in a first mode when an actual APS value and the virtual APS value are substantially the same and transitioning to a second mode when the actual APS value and the virtual APS value become different, wherein the first mode is a mode for sustaining a state of charge (SOC) of a battery at the target limit speed and the second mode is a mode for depleting the SOC; and
determining a transmission gear position by applying the determined virtual vehicle speed and the determined virtual APS value to one of a first shifting pattern and a second shifting pattern, wherein the first shifting pattern corresponds to the first mode and the second shifting pattern corresponds to the second mode.