Invention Grant
- Patent Title: Four-wheel drive vehicle clutch control method and clutch control device
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Application No.: US16490920Application Date: 2017-04-04
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Publication No.: US10759277B2Publication Date: 2020-09-01
- Inventor: Koutarou Tanaka , Yuusuke Hirahata , Keishirou Nakamura , Kouki Saitou
- Applicant: Nissan Motor Co., Ltd.
- Applicant Address: JP Yokohama
- Assignee: Nissan Motor Co., Ltd.
- Current Assignee: Nissan Motor Co., Ltd.
- Current Assignee Address: JP Yokohama
- Agency: Global IP Counselors, LLP
- International Application: PCT/JP2017/014051 WO 20170404
- International Announcement: WO2018/185827 WO 20181011
- Main IPC: B60W10/119
- 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.
Public/Granted literature
- US20200009962A1 FOUR-WHEEL DRIVE VEHICLE CLUTCH CONTROL METHOD AND CLUTCH CONTROL DEVICE Public/Granted day:2020-01-09
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