skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Comparative Study of Hybrid Powertrains on Fuel Saving, Emissions, and Component Energy Loss in HD Trucks

Journal Article · · SAE International Journal of Commercial Vehicles
DOI:https://doi.org/10.4271/2014-01-2326· OSTI ID:1156739
 [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
+ Show Author Affiliations

We compared parallel and series hybrid powertrains on fuel economy, component energy loss, and emissions control in Class 8 trucks over both city and highway driving. A comprehensive set of component models describing battery energy, engine fuel efficiency, emissions control, and power demand interactions for heavy duty (HD) hybrids has been integrated with parallel and series hybrid Class 8 trucks in order to identify the technical barriers of these hybrid powertrain technologies. The results show that series hybrid is absolutely negative for fuel economy benefit of long-haul trucks due to an efficiency penalty associated with the dual-step conversions of energy (i.e. mechanical to electric to mechanical). The current parallel hybrid technology combined with 50% auxiliary load reduction could elevate 5-7% fuel economy of long-haul trucks, but a profound improvement of long-haul truck fuel economy requires additional innovative technologies for reducing aerodynamic drag and rolling resistance losses. The simulated emissions control indicates that hybrid trucks reduce more CO and HC emissions than conventional trucks. The simulated results further indicate that the catalyzed DPF played an important role in CO oxidations. Limited NH3 emissions could be slipped from the Urea SCR, but the average NH3 emissions are below 20 ppm. Meanwhile our estimations show 1.5-1.9% of equivalent fuel-cost penalty due to urea consumption in the simulated SCR cases.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1156739
Journal Information:
SAE International Journal of Commercial Vehicles, Vol. 7, Issue 2; ISSN 1946-391X
Publisher:
SAE InternationalCopyright Statement
Country of Publication:
United States
Language:
English

Figures / Tables (27)

Figure 1(p. 2)figure Figure 1
Table 1(p. 3)table Table 1
Figure 2(p. 4)figure Figure 2
Table 2(p. 4)table Table 2
Table 3(p. 4)table Table 3
Figure 3(p. 5)figure Figure 3
Figure 4(p. 6)figure Figure 4
Figure 5(p. 7)figure Figure 5
Figure 6(p. 8)figure Figure 6
Figure 7(p. 8)figure Figure 7
Figure 8(p. 9)figure Figure 8
Figure 10(p. 10)figure Figure 10
Figure 11(p. 10)figure Figure 11
Figure 9(p. 10)figure Figure 9
Figure 12(p. 11)figure Figure 12
Figure 13(p. 11)figure Figure 13
Figure 14(p. 11)figure Figure 14
Figure 15(p. 12)figure Figure 15
Figure 16(p. 13)figure Figure 16
Figure 17(p. 13)figure Figure 17
Figure 18(p. 13)figure Figure 18
Figure A1(p. 17)figure Figure A1
Table A1(p. 17)table Table A1
Equation A1(p. 18)figure Equation A1
Table 3A(p. 18)table Table 3A
Table A1(p. 18)table Table A1
Equation A2(p. 19)figure Equation A2

Similar Records

Simulated Fuel Economy and Emissions Performance during City and Interstate Driving for a Heavy-Duty Hybrid Truck
Journal Article · Mon Apr 08 00:00:00 EDT 2013 · SAE International Journal of Commercial Vehicles · OSTI ID:1156739
+3 more
Simulation and Controls for Heavy Duty Dual Mode Hybrid Powertrain - Final CRADA Report
Technical Report · Fri Sep 05 00:00:00 EDT 2014 · OSTI ID:1156739
Powertrain Controls Optimization for HD Hybrid Line Haul Trucks - FY2014 Annual Report
Technical Report · Mon Dec 01 00:00:00 EST 2014 · OSTI ID:1156739

Related Subjects

33 ADVANCED PROPULSION SYSTEMS