US 11,654,882 B2
Device for controlling driving of an electric four-wheel drive vehicle at the time of shift
Jee Wook Huh, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Oct. 25, 2021, as Appl. No. 17/509,858.
Claims priority of application No. 10-2020-0171888 (KR), filed on Dec. 10, 2020.
Prior Publication US 2022/0185261 A1, Jun. 16, 2022
Int. Cl. B60W 20/10 (2016.01); B60W 10/06 (2006.01); B60W 10/08 (2006.01); B60K 6/52 (2007.10)
CPC B60W 20/10 (2013.01) [B60K 6/52 (2013.01); B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 2510/0666 (2013.01); B60W 2510/085 (2013.01); B60W 2510/1005 (2013.01); B60W 2510/106 (2013.01); B60W 2540/10 (2013.01); B60W 2710/0677 (2013.01); B60W 2710/086 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A device for controlling driving of an electric four-wheel drive vehicle at the time of shift, comprising:
a front wheel powertrain including an engine, a front wheel motor, and a transmission configured to shift powers of the engine and the front wheel motor and to output the shifted powers to front wheels;
a rear wheel powertrain including a rear wheel motor and a decelerator configured to decelerate power of the rear wheel motor and to output the decelerated power to rear wheels; and
a controller configured to,
when shift of the transmission starts during traveling through driving of the engine,
command the rear wheel motor to output a portion of driver demand power corresponding to power capable of being output by the rear wheel motor; and
command the front wheel motor to output power obtained by subtracting the output power commanded to the rear wheel motor and engine output power from the driver demand power; and
in response to determining that a sum of maximum power capable of being output by the front wheel motor and maximum power capable of being output by the rear wheel motor is less than the driver demand power, drive the engine and command the engine to output power determined according to an operating line map.