公开(公告)号：US10125864B2

公开(公告)日：2018-11-13

申请号：US15324587

申请日：2015-06-22

Applicant: JATCO Ltd ,  NISSAN MOTOR CO., LTD.

Inventor： Tomoaki Honma ,  Kohei Kamiya ,  Yuta Suzuki ,  Itaru Shinohara ,  Hiroshi Sekiya ,  Hiromu Ogino ,  Yasuhiro Endo ,  Yuzuru Tohta ,  Kouki Saitou

IPC: F16D48/06 ,  F16H61/14 ,  F16H45/02

Abstract: A control device for a lock-up-clutch installed in a torque converter arranged between an engine and an automatic transmission mechanism includes an engagement control means that carries out a calculation to increase an engaging capacity of the lock-up-clutch with the passage of time during an engagement control time in which the torque converter is shifted from a converter condition to a lock-up condition in which the prime mover drives an auxiliary device and in which when, during the control to increase the engaging capacity of the lock-up-clutch, an input torque to the torque converter from the engine is increased due to reduction in load of the auxiliary device, the engagement control means promotes the increase of the engaging capacity of the lock-up-clutch based on the amount of increase of the input torque thereby eliminating undesired pressure shortage that would be induced in the period toward the lock-up condition.

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.

公开(公告)号：US10759277B2

公开(公告)日：2020-09-01

申请号：US16490920

申请日：2017-04-04

Applicant: Nissan Motor Co., Ltd.

Inventor： Koutarou Tanaka ,  Yuusuke Hirahata ,  Keishirou Nakamura ,  Kouki Saitou

IPC: B60W10/119 ,  B60K23/08 ,  B60W10/02 ,  B60W30/18

Abstract: A clutch control method is provided for a four-wheel-drive vehicle in which the main drive wheels are connected to a drive source, and the auxiliary drive wheels are connected via a friction clutch to the drive source. When the vehicle starts off due to an accelerator depressing operation, the friction clutch is engaged to distribute, a drive torque from the drive source to the main drive wheels and the auxiliary drive wheels. In this clutch control method, when the vehicle switches from a traveling state to a stopped state while maintaining in a travel shift position, a control is preformed to apply initial torque as an engagement torque control of the friction clutch while the vehicle is stopped. A magnitude of the initial torque is set to a magnitude that maintains a drive-system torsion state by transmitting torque to an auxiliary-drive-wheel drive system before the vehicle is stopped.