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

2.3.2 Performance Measures
Fig. 18. Wiring Overview for FOT DAS
A variety of metrics were identified as being necessary to support drive cycle and modeling needs
pertaining to the test vehicles. The importance of the signal in supporting project objectives, cost,
sensor survivability, and practicality of implementation were all considered in deriving the list of
signals for the FOT, shown in Table 5.
Table 5. FOT Measures of Performance and Associated Sensors
Signal Sensor
1 Instantaneous Fuel Economy J1939 Vehicle Data Bus
2 Average Fuel Economy J1939 Vehicle Data Bus
3 Fuel Rate J1939 Vehicle Data Bus
4 Total Fuel Used J1939 Vehicle Data Bus
5 Total Idle Fuel Used J1939 Vehicle Data Bus
6 Current Gear J1939 Vehicle Data Bus
7 Selected Gear J1939 Vehicle Data Bus
8 Output Shaft Speed J1939 Vehicle Data Bus
9 Actual Engine - Percent Torque J1939 Vehicle Data Bus
10 Actual Gear Ratio J1939 Vehicle Data Bus
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