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| Document Title | OICA comments for improving proposed heavy-duty hybrid emissions tests | ||||||||
| Reference Number | HDH-09-08 | ||||||||
| Date |
27 Mar 2012
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| Summary | Comments and recommendations concerning the 'extended HILS' approach and application of the current worldwide heavy-duty vehicle emissions test cycle to hybrid vehicles. | ||||||||
| Source(s) | OICA | ||||||||
| Rulemaking Area(s) | Heavy-duty Hybrids (HDH) | ||||||||
| Meeting(s) | |||||||||
| Downloads | |||||||||
| UNECE server | .pdf format | ||||||||
| Excerpts from session reports related to this document | |||||||||
| HDH | Session 9 | 21-23 Mar 2012 |
Mr. Berg presented working paper HDH-09-08. He indicated that the extended HILS approach proposed by TU Vienna as a possible alternative would require new test equipment connected to the engine dyno. Overall, benefits would be low, and higher accuracy would better be achieved by powerpack testing. As regards the WHDHC proposed by TU Graz, WHTC has artifacts, like gear shift torque interrupts that may not be present in a hybrid vehicle with a non-conventional gearbox. In addition, the WHTC is based on assumptions that may not be valid for e.g. a serial hybrid. But also the WHVC would create some problems, since it defines no slopes thus being less |
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