Heavy-Duty Diesel Truck Fuel Consumption Modeling
An increasing number of fuel consumption models have been developed to provide support for eco-friendly policy-making in road freight transportation. The majority of the existing heavy duty diesel trucks (HDDTs) fuel consumption models, however, produce a bang-bang type of control, implying that drivers either accelerate at full throttle or brake at full braking to minimize their fuel consumption levels. This is obviously not correct. The paper uses the Virginia Tech Comprehensive Power-based Fuel consumption Model (VT-CPFM) framework in the modeling practice to circumvent the bang-bang control problem. The model is calibrated for each vehicle-technology category using in-field instantaneous data due to the lack of publicly available data. The results demonstrate that the developed model has a negative second-order parameter; namely, fuel consumption is a concave polynomial function of vehicle power, which is similar to transit buses but different from light duty vehicles (convex function). The model underestimates some fuel consumption rates, yet in general is demonstrated to be consistent with the field measurements and provides more accurate estimates compared to the comprehensive modal emissions model (CMEM). It is also found that the optimum fuel economy cruise speed ranges between 25∼36 km/h for the tested vehicle categories which is significantly lower than that of light duty vehicles (LDVs) (60∼80 km/h). Finally, the model is demonstrated to provide CO₂ estimates consistent with in-field measurements.
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Supplemental Notes:
- This paper was sponsored by TRB committee ADC20 Standing Committee on Transportation and Air Quality.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Wang, Jinghui
- Rakha, Hesham A
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Conference:
- Transportation Research Board 95th Annual Meeting
- Location: Washington DC, United States
- Date: 2016-1-10 to 2016-1-14
- Date: 2016
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: 16p
- Monograph Title: TRB 95th Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Driving; Environmental policy; Environmental protection; Fuel consumption; Heavy duty trucks
- Subject Areas: Energy; Environment; Freight Transportation; Highways; Vehicles and Equipment; I15: Environment; I91: Vehicle Design and Safety;
Filing Info
- Accession Number: 01587843
- Record Type: Publication
- Report/Paper Numbers: 16-2147
- Files: TRIS, TRB, ATRI
- Created Date: Jan 27 2016 5:12PM