Class-8 Heavy Truck Duty Cycle Project Final Report - Center for ...

Letter Report
SUMMARY OF RELEVANT HEAVY TRUCK PERFORMANCE MEASURES
March 11, 2005
INTRODUCTION
The list of signals and their recommended sensors are shown in tabular form below. A
simplified rendition is presented initially below that is split into two complementary sets.
The first set addresses information needs for defining duty cycles for existing and future
heavy truck simulation programs. The second set reflects the desire to collect field data
needed to benchmark simulations of vehicle performance in conjunction with a duty cycle.
These lists are preliminary and thus are not closed to amendments at this time.
The main objective of this sensor selection is to provide a sound benchmark for making
decisions related to technology investments in the future. It intends to meet data needs for
PSAT, vehicle dynamics and driver performance studies.
The table tentatively identifies where each parameters may be used and measured. Those
with TBD identify their need to be determined. We expect to eliminate all TBDs and
enhance the table content as we received feedback from the project partners.
For reference purposes, a literal copy of the description of this task in the project’s SOW
has been included as an appendix to this letter report.
LIST OF SIGNALS AND SENSORS FOR DUTY CYCLE DEFINITION
All signals should have a common time reference. Some signals although apparently
redundant will facilitate checks and balances.
• Ignition key position ON/OFF,
• Vehicle ground velocity, vertical velocity and heading,
• Vehicle position (longitude, latitude, altitude,)
• Vehicle acceleration (longitudinal and lateral,)
• Distance traveled.
• Outside air temperature,
• Wind speed and direction,
• Barometric pressure,
• Outside air humidity,
• Rain duration,
• Rain accumulation and
• Rain intensity.
List of signals for Heavy Truck Performance Benchmark definition
A-70
RaceLogic’s
VBox-5042
Vaisala’s
WXT510
Weather
transmitter