An Improved Non-Intrusive Automotive Suspension Testing Apparatus with Means to Determine the Condition of the Dampers 960735

Suspension testing equipment has previously been designed to provide the time-domain response of the automotive suspension. The results of this type of test, although quantitative, are dependent on all suspension components, and are unreliable in determining the safety of the vehicle and condition of the dampers. Frequency domain suspension testers have also been designed; however, they have been limited to the magnitude response of the suspension system. This result, usually referred to as “road” adhesion, is indicative of the safety of the vehicle; however, it is unreliable in determining the performance of the dampers. The present apparatus provides, along with the magnitude response (adhesion), the phase response of the wheel versus the road surface irregularities. This information, including a quantity known as “minimum phase angle,” gives valuable information as to the suspension damping value.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.