Invention Grant
- Patent Title: Electric vehicle
- Patent Title (中): 电动车
-
Application No.: US14003350Application Date: 2012-03-05
-
Publication No.: US08886381B2Publication Date: 2014-11-11
- Inventor: Takayoshi Ozaki
- Applicant: Takayoshi Ozaki
- Applicant Address: JP Osaka
- Assignee: NTN Corporation
- Current Assignee: NTN Corporation
- Current Assignee Address: JP Osaka
- Priority: JP2011-048631 20110307
- International Application: PCT/JP2012/055532 WO 20120305
- International Announcement: WO2012/121198 WO 20120913
- Main IPC: B60L15/20
- IPC: B60L15/20 ; B60L3/10

Abstract:
An electric vehicle includes a slip ratio estimator that estimates a slip ratio based on rotational frequencies of respective driven and drive wheels. The vehicle also includes a disturbance observer that determines an estimate of a torque attributable to external force. The vehicle also includes an estimator that may estimate an entire torque to the drive wheel, based on a motor torque command value and the estimate of torque. The vehicle also includes an estimator that estimates a coefficient of friction between a road surface and a tire, based on the entire torque and the slip ratio. The vehicle also includes a determiner that determines a maximum acceptable torque Tmax, based on the coefficient of friction and a vertical load component. Torque limitation is performed such that the motor torque command value does not exceed the maximum acceptable torque Tmax.
Public/Granted literature
- US20130345917A1 ELECTRIC VEHICLE Public/Granted day:2013-12-26
Information query
IPC分类: