Review of the 21st Century Truck Partnership Third Report (2015) / Chapter Skim
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8 SuperTruck Program
8 SuperTruck Program
Pages 116-136
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From page 116... ...
The Daimler team also evaluated freight The SuperTruck program was designed to provide a efficiency over a somewhat different 24-hour cycle. The full Class 8 tractor-trailer vehicle demonstration of a wide Cummins target is to demonstrate a 68 percent increase in range of technologies, many of which were developed at the freight efficiency on a 24-hr duty cycle (drive cycle plus component or subsystem level under previous 21st Century overnight hotel load)
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From page 117... ...
Weight reduction Aluminum fifth wheel and Aluminum frame Aluminum frame, cross MMC brakes, lighter axles, driveshaft, lighter axles and cross members, members, and driveshaft, driveshaft, and wheels, and wheels, silicon carbide lightweight air lightweight axles, aluminum engine and infused aluminum brake suspension. suspension, and wheels.
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From page 118... ...
Auxiliary power Clutched air compressor Clutched air compressor Clutched air compressor demand with active controls; with active controls; with intelligent dryer control, clutched power steering low-energy power accessories run on deceleration pump with reservoir; steering; look-ahead / coast. cab insulation and smart alternator; LED solar reflective paint lighting; cab insulation for reduced A/C power for reduced A/C power demand.
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From page 119... ...
presentation (Koeberlein, 2014) , conventional fuel cell APU to handle hotel loads during the stationary pordiesel combustion was retained, but with revisions to the tion of the 24-hr duty cycle.
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From page 120... ...
In the end, a single clutch automated manual transmisof which 12.2 kWh is used during the hotel load portion of sion was used. Optimization work was performed on the the 24-hr duty cycle.
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From page 121... ...
, the reduction in vehicle fuel consumption due ton-mile to improved engine efficiency is about 17.6 percent. Vehicle • Share of total fuel savings attributed to: fuel consumption on the long-haul cycle was reduced by 40 -- Engine improvements and WHR, 42 percent percent, so about 22.4 percent fuel consumption reduction -- Tractor aerodynamic improvements, 14 percent is due to vehicle power demand reduction.
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From page 122... ...
40% reduction in gallons per mile) 68% freight efficiency increase on a 24-hr duty cycle 86% demonstrated, and a 75% increase in Yes (40.5% reduction in load specific fuel consumption)
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From page 123... ...
had an impact on the program, and they will also increase the Atkinson LLC Engine controls development ability of the team to deliver improved products in the future. Delphi Solid oxide fuel cell APU (dropped from The subgroup asked the project team about its experi- program)
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From page 124... ...
Singh (2014) mentions that engine downsizing and some A diagram of the Detroit Diesel WHR system used in of the engine efficiency measures result in challenges for the final demonstrator vehicle is shown on Slide 11 of the cylinder block and head design, and for long-term high-load Daimler 2014 AMR (Rotz, 2014)
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From page 125... ...
, way: Of the total vehicle fuel savings on the long-haul drive and Cummins has announced a similar system for 2015 cycle, about 26 percent is due to engine efficiency improveproduction availability. ments and 74 percent to vehicle power demand reduction.
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From page 126... ...
aThe results presented in this table are based on data collected by the committee prior to May 2015. At the DOE Annual Merit Review in June 2015, Sandeep Singh of Detroit Diesel Corporation presented the following results: "Achieving 55% BTE is expected to require advanced combustion strategies such as DF-LTC (dual fuel and low temperature combustion)
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From page 127... ...
Volvo Group Truck Technology Power train, vehicle integration, and Detroit Diesel feels that the single operating point 55 per- testing cent BTE target is not as attractive as improving efficiency Ridge/Freight Wing Trailer aerodynamics over a realistic on-road duty cycle. It also pointed out the Grote Advanced LED lighting systems advantages of a system integration project like SuperTruck Ricardo Rankine cycle WHR Generation 1 compared to component-level development projects.
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From page 128... ...
Tests results demonstrated a need to deal with the rapid changes in engine gas flow and 13 to 15 percent fuel consumption reduction for the complete temperature that are characteristic of normal shifting with a vehicle, compared with the MY 2009 baseline (DOE VTO, manual transmission or an AMT. The dual clutch transmis2013)
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From page 129... ...
It projects that the lower vehicle power demand system is designed to always select the most efficient energy will result in comparable vehicle performance, although source/storage system to power typical hotel mode loads there may be slight misses in low-speed acceleration rate and (DOE VTO, 2013)
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From page 130... ...
As a result, this project will be com improvement and vehicle power demand reduction) ; pleted well after the other SuperTruck projects.
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From page 131... ...
Another item is an active trailer remain proprietary to the companies involved; gap/flow control device. The list of controls features such as • Participating companies have improved their fuel effismart cruise control, and parasitic power demand reduction ciency simulation and test capability; features is similar to that of the other SuperTruck teams.
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From page 132... ...
68% freight efficiency increase on a 24 hr duty cycle Demo vehicle is being designed Late 2016 (40.5% reduction in LSFC) 55% engine BTE Dual fuel work under way at ANL Late 2016 a The results presented in this table are based on data collected by the committee prior to May 2015.
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From page 133... ...
SuperTruck Future The committee believes that there are roles for a range 21CTP Partnership Responses to NRC Phase 2 of R&D projects under the 21st Century Truck Partnership. Recommendations These could range from gathering and analyzing data from field operations, to the development of specific technologies, Recommendation 3-2 in the NRC Phase 2 report (NRC, to large technology integration programs like SuperTruck.
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From page 134... ...
program to be a great success, and that the system integration The NRC Phase 2 Finding 6-3 and Recommendation 6-3 aspect of SuperTruck was a key to the program's success. concluded that the Delphi solid oxide fuel cell APU proto- The SuperTruck program drove technology development at type was, after 10 years of DOE funding and development, a faster pace than industry would have achieved on its own.
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From page 135... ...
in miles/ gallon and freight efficiency in ton-miles/gallon for their fuel Finding 8-7. SuperTruck project results show a limited use metric, while NHTSA regulations that were published potential impact on long-haul duty cycles for hybrid systems 5 years ago use fuel consumption (FC)
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From page 136... ...
DOE Annual Merit Review testing on identical duty cycles, so that differences in the ACE057, Washington, D.C., June 20. Koeberlein, E
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