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Research Papers

# Fuel Economy and Emission Performance of Fuel Cell-Based Diesel HEVs

[+] Author and Article Information
Daniel Crunkleton

Department of Chemical Engineering, University of Tulsa, Tulsa, OK 74104

Robert Strattan

Department of Electrical Engineering, University of Tulsa, Tulsa, OK 74104

In this communication, we choose to use the non-SI units of miles/hr (mph) for velocity, horsepower (hp) for power, and miles per gallon (mpg) for fuel economy with the metric/European equivalents of km/h, kW, and $l∕100km$ given parenthetically. This practice is chosen primarily to allow more direct comparisons of the results of this study with others, most of which use customary units.

J. Fuel Cell Sci. Technol 5(1), 011013 (Feb 01, 2008) (5 pages) doi:10.1115/1.2786470 History: Received September 22, 2006; Revised January 10, 2007; Published February 01, 2008

## Abstract

The fuel economy and emission advantages of diesel-electric hybrid powertrain modifications and an auxiliary fuel cell subsystem over those of a conventional midsize crossover SUV are discussed. The vehicle architecture is representative of one selected for the multiyear ChallengeX intercollegiate student design contest. To analyze the fuel economy, a simple “top-level” approach is used to estimate the fuel economy characteristics and performance potential to illustrate the advantages of the hybrid-electric powertrain configuration and the auxiliary fuel cells. Chained energy efficiency assumptions for the powertrain components lead to gasoline equivalent fuel mileage estimates. In the emission analysis, the greenhouse gases, regulated emissions, and energy use in transportation model is used to track the environmental impact of the powertrain on a well-to-wheels basis.

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## Figures

Figure 1

Parallel, through-the-road diesel hybrid examined in this work

Figure 2

Fuel economy for different powertrains studied in this work

Figure 3

Fuel economy variations with fuel cell power output

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