Invention Grant
- Patent Title: Road-surface friction-coefficient estimating device
- Patent Title (中): 路面摩擦系数估计装置
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Application No.: US12081245Application Date: 2008-04-11
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Publication No.: US08244432B2Publication Date: 2012-08-14
- Inventor: Masaru Kogure , Koji Matsuno , Takeshi Yoneda
- Applicant: Masaru Kogure , Koji Matsuno , Takeshi Yoneda
- Applicant Address: JP Tokyo
- Assignee: Fuji Jukogyo Kabushiki Kaisha
- Current Assignee: Fuji Jukogyo Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Smith, Gambrell & Russell, LLP
- Priority: JP2007-109622 20070418
- Main IPC: B62D6/00
- IPC: B62D6/00
Abstract:
A road-surface friction-coefficient estimating device compares a rack-thrust-force deviation value with a preliminarily set maximum-value-determination threshold value. If the rack-thrust-force deviation value is above the maximum-value-determination threshold value, the device determines that tires are slipping, and sets a front-wheel friction-circle utilization rate in that state as a road-surface friction coefficient. If the rack-thrust-force deviation value is below the maximum-value-determination threshold value, the device refers to a preliminarily set map to determine a restoring speed at which the road-surface friction coefficient is to be restored to 1.0 based on a vehicle speed and a front-wheel slip angle. While restoring the road-surface friction coefficient at the restoring speed, the device calculates and outputs the road-surface friction coefficient.
Public/Granted literature
- US20080262692A1 Road-surface friction-coefficient estimating device Public/Granted day:2008-10-23
Information query
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