2014年9月22日月曜日

SXE10 TOYOTA Altezza alignment

After finishing wheel alignment correction on SXE10 TOYOTA Altezza, I have realized that the difference of wheel bases on both side should be corrected until the same value would be obtained and the importance of an even wheel base length is one of an indispensable element that an equivalent with another ones. Though some engineer says that the discrepancy on wheel base does not affect on steering feel or a very little if it happens, so paying attention on the value is not always necessary. Now, I can say that such kind of opinion or just a rumor is just a white lie on Earth! Just believe in an unreliable opinion that is not proved with Scientific method is nothing but dangerous at all. Without proving in a adequate way should not be discerned, instead the truth and fact should be proved and established them by oneself. Truth and the fact are completely different from just an opinion.

4 points of 4 wheels should form Isosceles Trapezoid(Exception; Diamond-shaped Parallelogram) because the tread values differ each other between front and rear. And the wheel base value is the same right and left, Isosceles Trapezoid is formed if been seen planting. This circumstance condition is indispensable requirement to establish the correct wheel alignment on vehicles. In order to extend right side wheel 4mm, the rear suspension main bar was loosened on fixing 4 bolts and applying force for twisting effect and tightened, no longitudinal effect happened as a matter of fact, so, the tension rod bracket at rear hub housing was modified to form long hole at 6mm value. According to this idea, the difference of 4 mm length was compensated by this method.

As mentioned before, LASER pointer Special Tool was utilized to measure and adjust the horizontal direction procedure and 1719,75 mm half diameter Pendulum device was applied for vertical trials promptly.
As the result, after my desperate efforts for two days advocating, my SXE10 Altezza goes like an arrow without being influence by external disturbance from uneven road surface condition, remarkable improvement of stability while straight running, reduction of rudder adjustment, just keeping the steering wheel at centric position is enough to keep going straight though the road inclination causes the increase of rudder pressure. It was not established for these 10 years to measure and adjust the wheel alignment and suspension constructive geometry were precisely measured, adjusted and corrected as mentioned above until I correct the discrepancy of wheel bases, in another words, until set-back and Swung-Rear-End should be corrected to adequate condition promptly.

Driving feel under this extraordinary accurate suspension condition cannot tell in words, but just feel a comfortable world.
All the standard of values were followed onto manufacturer's manual.
Front;Total toe 0, Camber minus 48 min
Rear; Total toe 2mm(at tire external position), Camber minus 55 min.

0 件のコメント:

コメントを投稿