Review of the Research Program of the Partnership for a New Generation of Vehicles Fourth Report (1998) / Chapter Skim
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4 Technology Selection for Concept Vehicles
4 Technology Selection for Concept Vehicles
Pages 62-69
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From page 62... ...
For the societal benefits of increased fuel efficiency to be fully realized, other segments of the passenger car fleet, such as light trucks, must also be affected by the developments under the PNGV program. Second, Goal 3 does not take into account that major technological changes in mass produced cars are very likely to have significant secondary effects on energy use and emissions.
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From page 63... ...
This suggests that the technology selection process should recognize some technical approaches as near-term candidates, some as longer-term possibilities, and some as not likely to be used in passenger cars in the foreseeable future, although they may be deserving of continued R&D at some level. The PNGV reached its initial technology selection process milestone on schedule, and the USCAR partners can now continue with the design and construction of concept vehicles.
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From page 64... ...
The USCAR partners made extensive use of a simulation model in deciding which technologies to emphasize in the next phases of the program. Based on control algorithms, power train power output, and fuel consumption data, together with vehicle and chassis parameters, this simulation predicts the fuel economy
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From page 65... ...
For the first-pass technology selection, simulated comparisons of candidate power train technologies did not account for potential mass differences of either the power train or the chassis in response to variations in subsystem mass. A1though achieving the vehicle acceleration and fuel economy targets is essential, these measures alone are not sufficient for choosing a power train.
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From page 66... ...
The selection of the concept vehicle energy converter was based on a number of factors, including overall performance, fuel efficiency, emissions, cost, size, weight and state of development. Each company is giving near-term priority to the 4SDI internal combustion engine.
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From page 67... ...
The committee agrees with the PNGV's technology selections based on the performance potential and state of development of the systems and subsystems. CONCEPT VEHICLES The USCAR partners have independently built test vehicles that incorporate some of the advanced technologies and components being considered and have shared the results of their evaluations.
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From page 68... ...
68 an IL O O (I)
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From page 69... ...
They will not necessarily meet the criteria for the PNGV concept vehicles. For example, they were conceived as vehicles that would deliver only twice the baseline fuel economy.
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