Invention Grant
- Patent Title: Control device for four wheel drive vehicle
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Application No.: US15312831Application Date: 2015-05-26
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Publication No.: US09862270B2Publication Date: 2018-01-09
- Inventor: Yoshinori Maeda
- Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Applicant Address: JP Toyota
- Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee Address: JP Toyota
- Agency: Oliff PLC
- Priority: JP2014-111782 20140529
- International Application: PCT/IB2015/000738 WO 20150526
- International Announcement: WO2015/181607 WO 20151203
- Main IPC: B60K23/04
- IPC: B60K23/04 ; B60K17/35

Abstract:
A control device for a four wheel drive vehicle. Differential limitation is applied to both of right and left rear wheels, with 2WD_d state being maintained, by executing two wheel control for engaging or half-engaging a first clutch and a second clutch. As the two wheel drive control is executed, a moment that suppresses the rotation speed difference between the right and left rear wheels acts on the right and left rear wheels even in the 2WD_d state. When the rotation speed difference occurs between the right and left rear wheels, a braking force is allowed to act on the vehicle wheel on the high rotation side and a driving force is allowed to act on the vehicle wheel on the low rotation side through the execution of the two wheel drive control so that a stable moment acts on the vehicle without a transition to a 4WD state.
Public/Granted literature
- US20170113546A1 CONTROL DEVICE FOR FOUR WHEEL DRIVE VEHICLE Public/Granted day:2017-04-27
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