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This paper describes the development of a transient engine test facility for drive cycle simulation and emissions and performance testing. Results are presented to demonstrate correlation with vehicle tests performed on chassis rolls. The tools and techniques developed in the work are discussed.

This paper presents engine performance and emission results that demonstrate a high degree of correlation between tests performed on a transient engine dynamometer with simulated vehicle characteristics, and test performed on a chassis rolls with a vehicle. The transient testing methodology that has been developed is being used to underpin the transfer of vehicle calibration activity to the testbed.

This paper describes the capabilities and use of in-vehicle data acquisition and analysis tools that are being developed to help calibration engineers develop and refine vehicle calibrations for good driveability performance. The paper describes the functionality of the tools and gives examples of their use.

Vehicle driveability is now one of the keystones of product quality, and is refined aggressively to achieve product differentiation and market position. The work reported here gives the status of activities aimed at the development of metrics for driveability, and the use of automated analysis tools to help correlate subjective ratings with characteristics derived from measurement.