The RoaDyn S220 measuring hub meets the requirements of the established rolling resistance standards ISO 28580, SAE J1269 and ETRTO 117 for passenger car tire load indices of up to 121. By contrast with the torque and power measurement methods also used for rolling resistance tests, the S220 relies on the force measurement method. By measuring very close to the tire footprint the force method increases accuracy by reducing parasitic losses. Subsequent data conversion optimizes measurement precision on rolling resistance test stands by eliminating the effect of crosstalk. Data output is analog in the case of the RoaDyn S220 measuring hub and digital with the RoaDyn System 2000.
RoaDyn S2xy measuring hubs support research and development aimed at minimizing the energy consumption and optimizing the running characteristics of tires. These activities are focused on the need to cut fuel consumption and CO2 emissions without compromising safety characteristics.
Kistler supplies different RoaDyn measuring hubs for different load ranges and applications encountered in tire R&D. Typical areas of application in addition to rolling resistant measurement include high speed uniformity (HSU) tests, noise vibration and harshness (NVH) studies, flat spot investigations, service life, non-uniformity detection and quality monitoring on production lines.
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