method for measuring the parallelism of the wheels of the front and hinterwelle of motor vehicles and the rueckstellwinkel between vorderraedern and krabwinkel and device for to this procedure.

摘要

The alignment of the front and rear wheel systems of automotive vehicles as well as the dynamic setback and static setback are measured by means of an angular displacement pickup supported by a horizontal arm at the level of each front wheel and connected by a reference straight line to the opposite pickup. A light beam produced by an emitter carried by each arm is reflected from a mirror carried by the rear wheel and impinges on a photosensitive cell. Wheel alignment and setback angles are obtained from the angle values determined by the pickups and corresponding to direction-changing movements of the front wheel system which is turned successively from left to right and from right to left.