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Class-8 Heavy Truck Duty Cycle Project Final Report - Center for ...

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The SoMat eDaq data acquisition system (leased from NTRCI) will be used to capture data that<br />

is germane to the Pilot Test exclusively (See Figure 3.6).<br />

Figure 3.6 SoMat eDaq DAS<br />

In addition, the Somat eDaq Lite (Figure 3.7) will be evaluated and used to acquire all<br />

per<strong>for</strong>mance measures required <strong>for</strong> the Field Test, including J1939 CAN vehicle databus<br />

in<strong>for</strong>mation.<br />

Figure 3.7 eDaq Lite<br />

This system must be time synchronized with the eDaq <strong>for</strong> correlation and analysis. If proven<br />

successful in the Pilot Test, the eDaq Lite will be implemented on the Field Test vehicles.<br />

Total power consumption <strong>for</strong> the sensor suite/DAS will be measured based on the downselection<br />

of sensors and a separate DC supply will be provided <strong>for</strong> the sensor suite/DAS. This<br />

DC supply will be fed from the tractor’s alternator and the current will be monitored and<br />

subtracted from the “normal” accessory load.<br />

It may be of interest to take measurements with the engine off, i.e.,<strong>for</strong> calibration and <strong>for</strong><br />

measurement of electric power consumption by the signal acquisition and sensor system.<br />

3.4 Test Vehicles<br />

Figures 3.8 and 3.9 show the DANA supplied test vehicles to be used in the Pilot Test. These<br />

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