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HC (I assum hydrocarbons) is a column in the euro emission standards for trucks & buses. Which hydrocarbons are produced and at what quantities?

Would the particulate matter emissions be included in the hydrocarbon emissions?

https://en.wikipedia.org/wiki/European_emission_standards#Emission_standards_for_trucks_and_buses

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  • The specific pollutants depend on the specific engine model, condition and speed /power output when measured. Diesels are famous for continuing to run in poor condition ,often discharging black smoke. May 1 at 21:28
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Would the particulate matter emissions be included in the hydrocarbon emissions?

Yes, the particulate matter is hydrocarbons because the source fuel is hydrocarbons, but you need to look at the amounts. The emission limits of particulate matter are nearly two orders of magnitude below the emission limits of hydrocarbons. So an insignificant amount of the produced hydrocarbons are particulate matters. Most of the produced hydrocarbons are in the form of evaporated hydrocarbons, not in the form of particulate matters.

In fact, if you have a measuring device that only measures evaporated hydrocarbons, you get a pretty good picture of the emitted hydrocarbon amount even though it's incorrectly omitting particulate matter.

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