Invention Grant
- Patent Title: Electric vehicle
- Patent Title (中): 电动车
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Application No.: US14502539Application Date: 2014-09-30
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Publication No.: US09114711B2Publication Date: 2015-08-25
- Inventor: Takayoshi Ozaki
- Applicant: NTN CORPORATION
- Applicant Address: JP Osaka
- Assignee: NTN CORPORATION
- Current Assignee: NTN CORPORATION
- Current Assignee Address: JP Osaka
- Priority: JP2011-048631 20110307
- Main IPC: B60L15/20
- IPC: B60L15/20 ; B60L3/10 ; B60K7/00

Abstract:
An electric vehicle includes a slip ratio estimator to estimate a slip ratio of a drive wheel on a road surface based on a detection value indicating a vehicle travel speed and a drive wheel rotational frequency; an applied torque estimator to estimate an entire torque applied to the drive wheel based on motor torque command value or motor current value of a motor unit and the torque estimated by a disturbance observer attributable to external force; a coefficient of friction estimator to estimate a coefficient of friction between a road surface and a tire of the drive wheel, based on the estimated torque and the estimated slip ratio; and a motor torque command value limiter to limit, based on a determined maximum acceptable torque, the motor torque command value to the motor unit that is generated responsively to an acceleration manipulation unit and a deceleration manipulation unit.
Public/Granted literature
- US20150142240A1 ELECTRIC VEHICLE Public/Granted day:2015-05-21
Information query
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