Testing a Heavy Duty Class 8 Truck, Green Tech, Page 5
Testing a Heavy Duty Class 8 Truck | 
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Les Rencontres Scientifiques d'IFP Energies nouvelles - RHEVE 2011
Table 2: HIL Test Results of the Baseline MTVR over a 50 mph (80
kph) Trapezoidal Driving Cycle
Trapezoidal 50 mph (80 kph) Driving Cycle
Test # Fuel Economy Fuel Economy (mpg) -
(mpg) Engine Engine Fan OFF
Fan ON (Simulated Electric
Fan)
1 6.16 6.28
2 6.22 6.22
3 6.16 6.28
4 6.15 6.30
5 6.15 6.35
Average 6.165 6.285
Standard
0.026 0.044
Deviation
Error Band of Figure 8: Histogram of engine speed and torque for
the Trapezoidal
average at 95 profile
0.032 0.054
% confidence
Table 3 summarizes the HIL tests over the heavy
heavy-
level
duty diesel truck transient cycle (HHDDT). This
drive
cycle is shown in Figure 9.
Figure 7: Engine speed and torque Operating Points for the
Trapezoidal Profile
Figure 9: The Heavy Heavy-duty Transient drive
cycle
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