K&C Testing Tips

Testing at Different Loading Conditions

Measurement of suspension compliance under load is of critical importance to engineers involved in design, development, and simulation. Parameters such as camber and steer and how they change under lateral and longitudinal loading are of critical importance to vehicle handling and performance. Yet another factor that impacts suspension compliance is the vertical loading condition. As such, it is important to measure compliance at all of your vertical loading condition(s) of interest.


What impact does vertical loading have on compliance? Vertical loading effects compliance in a number of ways. A different vertical load corresponds to a different suspension position, which can result in different compliance. This is especially significant on cars with very short virtual swing arms (either front view or side view). In those cases, compliance can be dramatically different. Another issue occurs on cars with bump stops. Compliance and jacking force can be very different when a car is riding on bump stops compared to a position where a bump stop is not engaged. Even without these factors, all else being equal, you will typically see less camber and steer compliance at higher vertical loading. So be sure to do compliance tests at the vertical loading condition(s) that make sense for your application.


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