Apparatus for calculating vehicle-wheel revolution

专利名称：Apparatus for calculating vehicle-wheel

revolution values

发明人：Masao Watanabe,Ken Asami申请号：US07/339252申请日：190417公开号：US049165A公开日：19910129

摘要：An apparatus for calculating vehicle-wheel revolution estimated values detectsparameters such as the number of vehicle-wheel revolutions and vehicle-wheel revolutionspeeds, detects differences between the previous estimated values and the detectedparameters or other parameters such as vehicle-wheel revolution speeds andaccelerations calculated from the detected parameters, stores the differences at apredetermined rate, determines variations, and updates the estimated values based onthe determined variations. Since the variations are determined so that the increase rate ofthe variations decreases as the accumulated values of the differences increase, lag time isminimized and at the same time noise is eliminated, thus precisely estimating therevolution values of the vehicle wheels. Antiskid control, traction control, and othercontrols can be effectively executed by using the estimated values even when the vehiclewheels move vertically on rough road surfaces or even when the vehicle wheels areeccentric. Consequently, the braking distance can be reduced, and the braking effectsand the durability of control units are enhanced.

申请人：TOYOTA JIDOSHA KABUSHIKI KAISHA

代理机构：Oliff & Berridge

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