Powertrain Digital Twinning for Real-world Emissions Compliance

Authors

S. Whelan, A. Mason, O. Mellor - HORIBA MIRA

Summary

The scheduled introduction of EU7 emissions regulations has increased the depth of field for real-world emissions compliance. Whilst EU6 emissions legislation provided clear boundaries by which vehicle and powertrain Original Equipment Manufacturers (OEMs) could develop and calibrate against, the more stringent emissions limits and wider real-world driving test fields of EU7 are more difficult to ensure compliance with.

In-house and in-field physical testing to assess emissions compliance of a vehicle and powertrain will not be enough to ensure emissions produced during any real-world driving meets legislative limits. It is likely therefore that OEMs will need to adopt some aspect of virtual engineering to supplement physical testing. In this respect, the HORIBA Intelligent Lab virtual engineering toolset has been created and deployed to produce empirical digital twins of a modern light-duty electrified gasoline Internal Combustion Engine (ICE) and a commercial vehicle diesel ICE. The former was created with the specimen tested on an engine dynamometer with the latter ICE tested using chassis dynamometer methodologies. Both powertrains were exercised across their entire operational ranges with the subsequent performance and emissions measurements used to generate corresponding transient empirical response models.
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