Importance

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Abstract

A wheel alignment measuring apparatus including four angle measuring instruments for mounting on front wheels and rear wheels of a vehicle, and including a calculation circuit for the determination of track measuring values. A measuring bridge is operatively provided essentially transversely to the driving direction and is positioned approximately between the front wheels and the rear wheels. Four additional angle measuring instruments are provided, two being operatively arranged on one side and two being operatively arranged on the other side of the measuring bridge. An elastic tension member is operatively connected between the four angle measuring instruments and the four additional angle measuring instruments for measuring the angle positions of the wheels. The calculation circuit determines the track measuring values from comparing angular positions of all angle measuring instruments. The angle measuring instruments are arranged and connected so that influences resulting from the track of the vehicle wheels and the width of the measuring bridge as well as differences in the distance between the measuring bridge and the front wheels or the rear wheels are not reflected by the result of the measurement.

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First Claim