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

Speed [mph]
90
80
70
60
50
40
30
20
10
Vehicle Speed Gear #
0
0
0 1000 2000 3000 4000 5000 6000 7000 8000
Time [s]
Fig. 48. Proposed Mapping for Duty Cycle Type B
During the WVU Dyno Tests, synthetic duty cycle Type A was implemented, and information was
generated and collected for that cycle. One of the runs (i.e., run 5259-2; see the Dyno Test Report in
Appendix E) is shown graphically in Fig. 49. The information to produce this duty cycle (i.e., vehicle
speed as a function of time) was obtained from sensors installed by WVU during the tests. Notice
that, although for this particular run the speeds are different from those suggested in Fig. 47, the
shape of the duty cycle is similar to the one shown in that figure or in the left half of Fig. 48.
Vehicle Speed [mph]
50
40
30
20
10
0
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Time [s]
Fig. 49. WVU Implemented Mapping of the Selected Duty Cycle (Duty Cycle Type A, Run 5259-2)
55
10
9
8
7
6
5
4
3
2
1
Gear#