Importance

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Abstract

A device for estimating a rolling condition of a body of a vehicle having: a unit for estimating a first quantity (.phi., .gamma.V, Gy, Ff) corresponding to roll angle (.phi.) of the vehicle body around a rolling axis; a unit for estimating a second quantity corresponding to a change rate (.phi.) of the roll angle of the vehicle body; a unit for estimating a third quantity indicating a relative magnitude (.phi./.phi..sub.limit, .gamma.V/(.gamma.V).sub.limit, Gy/Gy.sub.limit, Ff/Ff.sub.limit) of the first quantity with reference to a first limit value predetermined therefor; a unit for estimating a fourth quantity indicating a relative magnitude (.phi./.phi..sub.limit) of the second quantity with reference to a second limit value predetermined therefor; and a unit for estimating the rolling condition as a combination of the third and fourth quantities such that the rolling condition is intensified along with increase of the third quantity as well as increase of the fourth quantity.

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First Claim