HHDDT

AcronymDefinition
HHDDTHeavy Heavy-Duty Diesel Truck
References in periodicals archive ?
For the HHDDT cycle for the Cummins ISX-15 vehicle, all biofuels led to reductions in C[O.
The same picture was seen for the HHDDT cycle, with the HVO fuels showing lower C[O.
Overall, the results reported here for the Cummins ISX-15 vehicle did not show strong differences in carbon balance fuel economy between the test fuels for either the UDDS or the HHDDT cycles.
For the HHDDT cycle, HVO100 showed a marginally statistically significant reduction in fuel economy of 3% compared to CARB ULSD, whereas the biodiesel blend showed a 3% reduction in fuel economy compared to CARB ULSD, at a statistically significant level.
PM mass was collected cumulatively for the entire triplicate UDDS and HHDDT cycles for all vehicle/fuel combinations due to the expected low PM levels.
For the HHDDT cycle for the Cummins ISX-15 vehicle, solid particle number emissions did not show strong fuel trends.
For both the UDDS and HHDDT cycles for the Cummins ISB6.
Figure 12 and Figure 13 illustrate the particle size distribution profiles for the Cummins ISX-15 vehicle over the UDDS and HHDDT cycles, respectively.
For the HHDDT cycle, HVO50 and HVO100 showed trends of lower N[O.
For the Cummins ISX-15 vehicle, fuel economy did not show strong differences between the test fuels for either the UDDS or the HHDDT cycles.