US 12,214,768 B2
Driving force control method and driving force control device
Tadashi Iwamoto, Kanagawa (JP)
Assigned to Nissan Motor Co., Ltd., Yokohama (JP)
Appl. No. 18/688,964
Filed by Nissan Motor Co., Ltd., Yokohama (JP)
PCT Filed Sep. 6, 2021, PCT No. PCT/JP2021/032722
§ 371(c)(1), (2) Date Mar. 4, 2024,
PCT Pub. No. WO2023/032220, PCT Pub. Date Mar. 9, 2023.
Prior Publication US 2024/0326771 A1, Oct. 3, 2024
Int. Cl. B60W 10/08 (2006.01); B60L 15/20 (2006.01); B60W 20/15 (2016.01)
CPC B60W 10/08 (2013.01) [B60L 15/20 (2013.01); B60W 20/15 (2016.01); B60W 2520/10 (2013.01); B60W 2720/403 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A driving force control method for controlling front wheel driving force and rear wheel driving force by a front wheel motor connected to a front wheel of a vehicle and a rear wheel motor connected to a rear wheel, respectively, the driving force control method comprising:
executing a step corresponding control of reducing a vibration transmitted to a vehicle cabin when the rear wheel rides up a step by adjusting driving force of the front wheel motor and driving force of the rear wheel motor when the vehicle passes through the step, wherein
in the step corresponding control,
a control mode for adjusting driving force distribution is transitioned in an order of a first control mode in which the front wheel motor is regenerated and the rear wheel motor is powered and a second control mode in which the front wheel motor is powered and the rear wheel motor is regenerated,
the first control mode is executed after a front wheel ride-up timing at which the front wheel rides up the step and before a rear wheel ride-up timing at which the rear wheel rides up the step, and
the second control mode is executed after the execution of the first control mode and before the rear wheel ride-up timing; and
executing a step determination process of determining whether the vehicle passes through the step, wherein, in the step determination process,
when both of the front wheels are detected to have crossed the step, the vehicle is determined to pass through the step, and
when at least one of the front wheels is not detected to have crossed the step, the vehicle is determined to not pass through the step, the driving force control method further comprises:
executing, when the vehicle is determined to pass through the step, the step corresponding control; and
executing, when the vehicle is determined to not pass through the step, basic drive control to set the driving force of the front wheel motor and the driving force of the rear wheel motor to a prescribed basic driving force.