sensor for NO
is also required to optimally implement various emission control strategies such
as EGR. The objective of this task is to identify research needs in sensors and control
components, and as required, to develop such components. Activities in this area will be
coordinated with ongoing programs within OHVT and other offices of OTT.
Task 6: Concept/Demonstration Truck Sponsorship. This task includes the
sponsorship of a fully-instrumented concept truck for (a) the demonstration of new thermal
management system concepts and equipment, and (b) the development of a data base of pertinent
temperatures, pressures, and flows, as well as fuel economy and emissions reduction information,
for various drive cycles. It is imperative that the benefits of any new concepts and technologies
be clearly demonstrated for customer (fleet and individual-owner operators) acceptance of such
technologies, which may be more expensive initially but have demonstrable payback over time. It
is equally important that a data base of temperature, pressure, and flow rate measurements be
established for use in the validation and further development/refinement of simulation codes.
Validation is crucial if such codes are to be accepted and used by industry to optimize thermal-
management systems and underhood airflow for system efficiency and aerodynamic drag
An example in which a demonstration truck would be important is that of variable-speed
components (drives, fans, pumps, and compressors). There is general agreement that such
devices would be much more efficient and would enable the application of advanced thermal
management concepts such as nucleate-boiling cooling. However, a quantitative measure of
efficiency improvements is not currently available and can be determined only from field testing
with an instrumented vehicle.
The task of developing and operating a concept truck will involve close coordination and
significant cost-sharing with industry. An initial subtask will establish a task force consisting of a
truck manufacturer(s), engine manufacturer(s), equipment suppliers, and fleet operator(s), which
would define the objectives, approach, and operational responsibilities for the concept truck.
Question and issues that must be resolved include the following: What are the critical parameters
to be measured? What organization should operate the vehicle? What is the protocol for a truck
manufacturer or equipment supplier to use the truck to evaluate new designs or concepts? What
new sensors and control equipment must be developed and implemented? What data acquisition
equipment is required? How will costs be shared between DOE/OHVT and the different
companies using the truck?
DOE/OHVT has a longer-range plan to demonstrate a 12-mpg truck that would include
all feasible aerodynamic drag-reduction techniques. The concept truck proposed under this task
would be the precursor to the 12-mpg demonstration truck, because many of the advanced
thermal management system concepts demonstrated and evaluated on the concept truck of this
task activity would also be included on the 12-mpg demonstration vehicle.