Innovative Catalyst System to Achieve EU7 Legislation for Electrified Powertrains

Authors

Dipl.-Ing. R. Brück, Dipl.-Ing. K. Konieczny, Vitesco Technologies Emitec GmbH, Lohmar:

Year

2022

Print Info

Production/Publication ÖVK

Summary

The new passenger car emission legislation for Europe (EU7), California (Advanced Clean Car 2) and China (China 7) most likely will be introduced in the time frame between 2025 and 2027. Unfortunately, as of today (February 2022) no “official drafts” are published. It seems that for example the EU7 commission proposal might be published in July 2022. In addition to this very late announcement the politically wanted and funded introduction of electrified and battery electrical vehicles makes it difficult to predict which powertrain concepts will be needed in the future. This situation is aggravated by the fact that today the absolute market numbers for combustion engines are unforeseeable, or at least not plannable in the different regions of the world.

Based on the up to now published information and studies of a possible EU7 legislation it can be assumed that because of a shortened trip length for real driving emission testing and also lower ambient testing temperatures like -7°C, compared to today, the cold start will become even more challenging and that catalyst light-off will be needed within a few seconds. Also, for electrified powertrains, which can start a trip by pure electrical driving, so called rapid accelerations might become the most challenging operation mode. Based on today`s exhaust system layouts for such driving conditions the catalyst system is still cold while the engine is rapidly speeding up to high engine speed and torque, which might require preheating of the catalyst system.
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ISBN

1920-2323-23-1

Number of pages

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