Hydrocarbon Traps used by what other car manufacturers?

[jimgt2k24]

What other car manufacturers use these hydrocarbon traps to kill HP/TQ?

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[Skye]

The following is an article from 2014, referencing their use.

Depending on the vehicle and location, these traps are not new technology.

https://www.basf.com/us/en/media/news-releases/2014/01/p-13-477.html

https://www.sae.org/publications/technical-papers/content/2017-01-1014/

EPA roadmap. Search for "HC" or "trap" and you'll see how they intended to use the technology.

https://www.energy.gov/eere/vehicle...n-and-emission-control-technical-team-roadmap