公开(公告)号：US11554664B2

公开(公告)日：2023-01-17

申请号：US17617985

申请日：2019-07-04

Applicant: Nissan Motor Co., Ltd.

Inventor： Daisuke Hiroi ,  Hiroshi Nishida

IPC: B60K23/08 ,  B60K17/348

Abstract: A drive force distribution method and a drive force distribution control device is provided for a front and rear wheel drive vehicle provided with a drive force distribution device that controls a distribution of a drive force generated by a drive force source to main drive wheels and auxiliary drive wheels. A present distribution of the drive force to an auxiliary drive wheel side is increased by a first predetermined amount upon determining the rotational speed difference between the rotational speeds of the main drive wheels and the auxiliary drive wheels has been determined to not be smaller than a predetermined rotational speed difference. The present distribution of the drive force to the auxiliary drive wheel side is reduced by a second predetermined amount when the rotational speed difference has been determined to be smaller than the predetermined rotational speed difference.

公开(公告)号：US20230391204A1

公开(公告)日：2023-12-07

申请号：US18032642

申请日：2020-10-20

Applicant: Nissan Motor Co., Ltd.

Inventor： Masahito Taira ,  Daisuke Hiroi ,  Kentaro Hashimoto

IPC: B60L15/20 ,  B60L3/10 ,  B60K23/08

CPC classification number: B60L15/20 ,  B60L3/10 ,  B60K23/0808 ,  B60L2240/421 ,  B60Y2300/188

Abstract: A driving force control method is executed in a vehicle including first and second electric motors, and distributes a requested driving force for driving at a predetermined distribution ratio according to a traveling state and outputs the requested driving force by the first and second electric motors. The method includes: transferring an output torque from one electric motor to the other in response to a change in the distribution ratio based on the traveling state; setting a slip state parameter indicating a slip state; when the slip state parameter is equal to or smaller than a predetermined threshold value, setting an upper limit of a change speed of the output torque to be transferred to a first upper limit value that is small; and when the slip state parameter exceeds the threshold value, setting the upper limit of the change speed to a second upper limit value that is large.

公开(公告)号：US20230365001A1

公开(公告)日：2023-11-16

申请号：US18029853

申请日：2020-10-05

Applicant: Nissan Motor Co., Ltd.

Inventor： Daisuke Hiroi ,  Masahito Taira ,  Kentaro Hashimoto

IPC: B60L15/20

CPC classification number: B60L15/20 ,  B60L2260/28 ,  B60K17/356

Abstract: A control method for an electric four-wheel drive vehicle including a front drive source for driving a front wheel and a rear drive source for driving a rear wheel independently of the front wheel includes: acquiring a driving direction of the electric four-wheel drive vehicle based on an input state of a shift lever; acquiring an actual moving direction of the electric four-wheel drive vehicle; and when the driving direction and the moving direction are different from each other, setting a basic driving force for suppressing movement in the moving direction for the front wheel and the rear wheel, and driving one wheel of the front wheel and the rear wheel with a driving force smaller than the basic driving force by implementing a limit for setting an upper limit value for a driving force generated in the one wheel.

公开(公告)号：US11713033B2

公开(公告)日：2023-08-01

申请号：US17632245

申请日：2020-10-22

Applicant: Nissan Motor Co., Ltd.

Inventor： Daisuke Hiroi ,  Kouki Saitou ,  Kentaro Hashimoto

IPC: B60W10/119 ,  B60L15/20 ,  B60K6/52

CPC classification number: B60W10/119 ,  B60L15/2045 ,  B60K6/52 ,  B60L2240/12 ,  B60L2240/14 ,  B60L2240/461 ,  B60L2240/465 ,  B60W2520/04 ,  B60W2520/105 ,  B60W2520/26 ,  B60W2520/28 ,  B60W2720/403 ,  B60Y2200/91 ,  B60Y2200/92

Abstract: A control method controls an electric four-wheel-drive vehicle to switch a drive torque distribution between a first distribution prioritizing energy efficiency and a second distribution prioritizing driving performance. The distribution is set to the second distribution where wheel slip is detected during a trip, and returned to the first distribution once the vehicle has stopped. When wheel slip is detected at least during acceleration, the distribution is switched from the first distribution to the second distribution. When wheel slip is detected during deceleration, a slip experience flag is set. The slip experience flag is maintained at least until starting off in a subsequent trip. Where the slip experience flag has been set, the distribution is maintained as the second distribution when the vehicle has stopped, and where the slip experience flag has not been set, the distribution is returned to the first distribution upon the vehicle being stopped.