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1. 发明公开

EP0747691A2 Apparatus and method for detecting friction characteristics 失效
标题翻译： Gerätund Methode zur Feststellung der Kraftschlusscharakteristik
公开(公告)号：EP0747691A2
公开(公告)日：1996-12-11
申请号：EP96109058.6
申请日：1996-06-05
申请人： KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
发明人： Katsuhiro, Asano , Masaru, Sugai, Nagakute-ryo 208
IPC分类号： G01N19/02
CPC分类号： B60T8/172 , B60T2210/12 , G01N19/02
摘要： An apparatus and method for detecting friction characteristics are disclosed, in which a wheel resonant system includes a vehicle body, a road surface and at least a wheel. A braking force control system exerts a braking force on the wheel. A resonant component detector determines a resonant gain providing the ratio between the amplitude of predetermined frequency component of the braking force and that of the wheel velocity and detects the ratio of the resonant gain to a present reference gain, a deviation calculator calculates the deviation between this ratio and unity, a PI controller controls the braking force control system in such a manner that the deviation coincides with zero, and a friction characteristics detector detects the friction characteristics on the basis of the braking force. When the friction force is made to approach a peak value by increasing the braking force, the resonant characteristics undergo a change thereby to reduce the resonant gain. By controlling the braking force in such a manner that the deviation coincides with zero, therefore, the friction characteristics are held at a peak value. This braking force reflects the friction characteristics, and therefore the friction characteristics between the road surface and the wheel can be accurately detected according to the relative magnitude of the braking force.
摘要翻译：公开了一种用于检测摩擦特性的装置和方法，其中车轮共振系统包括车身，路面和至少一个车轮。制动力控制系统对车轮施加制动力。谐振分量检测器确定提供制动力的预定频率分量的振幅与车轮速度的幅度之间的比率的谐振增益，并且检测谐振增益与当前参考增益的比率，偏差计算器计算该比率和一致性，PI控制器以这样的方式控制制动力控制系统，使得偏差与零点一致，并且摩擦特性检测器基于制动力检测摩擦特性。当通过增加制动力使摩擦力接近峰值时，谐振特性经历变化，从而降低谐振增益。因此，通过以与偏差一致的方式控制制动力，摩擦特性被保持在峰值。该制动力反映摩擦特性，因此可以根据制动力的相对大小精确地检测路面与车轮之间的摩擦特性。

2. 发明授权

EP0747691B1 Apparatus and method for detecting friction characteristics 失效
标题翻译：装置和方法，以确定粘附特性
公开(公告)号：EP0747691B1
公开(公告)日：2002-11-27
申请号：EP96109058.6
申请日：1996-06-05
申请人： KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
发明人： Katsuhiro, Asano , Masaru, Sugai, Nagakute-ryo 208
IPC分类号： G01N19/02 , B60T8/00
CPC分类号： B60T8/172 , B60T2210/12 , G01N19/02

3. 发明公开

EP0747691A3 Apparatus and method for detecting friction characteristics 失效
标题翻译：装置和方法，以确定粘附特性
公开(公告)号：EP0747691A3
公开(公告)日：1997-10-22
申请号：EP96109058.6
申请日：1996-06-05
申请人： KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
发明人： Katsuhiro, Asano , Masaru, Sugai, Nagakute-ryo 208
IPC分类号： G01N19/02
CPC分类号： B60T8/172 , B60T2210/12 , G01N19/02
摘要： An apparatus and method for detecting friction characteristics are disclosed, in which a wheel resonant system includes a vehicle body, a road surface and at least a wheel. A braking force control system exerts a braking force on the wheel. A resonant component detector determines a resonant gain providing the ratio between the amplitude of predetermined frequency component of the braking force and that of the wheel velocity and detects the ratio of the resonant gain to a present reference gain, a deviation calculator calculates the deviation between this ratio and unity, a PI controller controls the braking force control system in such a manner that the deviation coincides with zero, and a friction characteristics detector detects the friction characteristics on the basis of the braking force. When the friction force is made to approach a peak value by increasing the braking force, the resonant characteristics undergo a change thereby to reduce the resonant gain. By controlling the braking force in such a manner that the deviation coincides with zero, therefore, the friction characteristics are held at a peak value. This braking force reflects the friction characteristics, and therefore the friction characteristics between the road surface and the wheel can be accurately detected according to the relative magnitude of the braking force.

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