Heavy Duty Hybrid Powertrain Testing
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Presentation on Environment Canada and US EPA joint program.

Reference Number: HDH-11-08
Origin: ECCC and US EPA
Date: 11 October 2012
Related Documents:
HDH-18-04 | US Adoption of GRPE Heavy-Duty Hybrid new annex to Global Technical Regulation n°4
Informal Group on Heavy-Duty Hybrids | Session 11 | 10-12 Oct 2012

Joint EC/EPA presentation

Mr. Giallonardo presented working paper HDH-11-08. He indicated that the program was focused on Post-TM testing. Several months of trials and high hybrid manufacturer involvement were needed for being able to run the tests. The complete set-up basically represents a chassis dyno test operated a powerpack test. It was only used for a relative comparison between hybrid and non-hybrid vehicles. It was concluded and confirmed by EPA that chassis dyno testing and powerpack testing compare pretty well for CO2, but differences were observed for criteria pollutants, especially NOx.