G - Physics – 01 – B
Patent
G - Physics
01
B
33/55
G01B 11/275 (2006.01)
Patent
CA 1285383
Method and arrangement for the measurement of wheel alignment angles in the front axle and suspension assembly of a motor vehicle A b s t r a c t Proposed in accordance with the invention is a method of measuring the camber, KPI and caster wheel alignment angles in the front axle and suspension assembly of a motor vehicle without the need for recourse to a levelled surface or to any gravitation- -sensing instruments for the purpose of the measurements. One front wheel at a time is measured, for which purpose the wheel is fitted with a projecting pin parallel to the wheel axle intended to support a laser beam machine which emits a beam perpendicular to the wheel axle. A screen marked with reference lines is positioned at a certain distance away from the wheel, initially in front of, and then alongside the wheel, with the direction of the reference lines corresponding to the direction of the reference plane of the vehicle. By causing the Laser to rotate about the pin, and by causing the wheel to execute steering movements with the laser fixed to the pin, the laser beam can be made to "draw" lines on the screen, which lines produce angles with the reference lines of the screen in accordance with the camber, KPI and caster angles of the wheel. In order to be able to carry out the measurements rapidly and accurately, and at the same time to have the results of measurement recorded, the use of a special design of the aforementioned screen is proposed, more specifically in the form of a measurement panel (60) equipped with a pointer (80), to which panel a sheet of paper bearing a scale (90) can be secured. The results of measurement are recorded on this automatically by the operator making a mark with a pen in an opening (81) in the pointer (82) after every measurement adjustment. (Fig. 24)
548038
Horvallius Torgny
Swabey Ogilvy Renault
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