Re: [sumo-user] Fuel consumption model parameters

[Michael Behrisch <oss@xxxxxxxxxxx>]

Hi,
the parameters have always been for milligrams. Before the change in 
1.14.0 we just calculated the ml values ourselves by applying an average 
density for gasoline / diesel, see 
https://github.com/eclipse/sumo/blob/main/src/utils/emissions/HelpersHBEFA3.h#L106

Best regards,
Michael

Am 11.12.22 um 20:59 schrieb Chen Di:
> Thanks Jakob, that helps!
> A follow-up question is, these parameters are serving for milligram. So 
> I was wondering if the parameter values for liters are still public. If 
> so, where can I find them?
>
> Thanks,
>
> Jakob Erdmann <namdre.sumo@xxxxxxxxx <mailto:namdre.sumo@xxxxxxxxx>> 于 
> 2022年12月11日周日 03:48写道：
>
>     The parameters for all models are embedded in the source files:
>     https://github.com/eclipse/sumo/blob/main/src/utils/emissions/HelpersHBEFA.cpp <https://github.com/eclipse/sumo/blob/main/src/utils/emissions/HelpersHBEFA.cpp>
>     https://github.com/eclipse/sumo/blob/main/src/utils/emissions/HelpersHBEFA3.cpp <https://github.com/eclipse/sumo/blob/main/src/utils/emissions/HelpersHBEFA3.cpp>
>     https://github.com/eclipse/sumo/blob/main/src/utils/emissions/HelpersHBEFA4.cpp <https://github.com/eclipse/sumo/blob/main/src/utils/emissions/HelpersHBEFA4.cpp>
>
>     Am So., 11. Dez. 2022 um 09:04 Uhr schrieb Chen Di
>     <dichen981@xxxxxxxxx <mailto:dichen981@xxxxxxxxx>>:
>
>         Dear Mr./Mrs.,
>
>         I am aware that vehicle fuel consumption information can be
>         retrieved from travi.vehicle.getFuelConsumption. However, I
>         would like to know the specific fuel consumption model that is
>         used and the parameter values of it. I found the model from this
>         paper (https://elib.dlr.de/89398/1/2ndGenEmissions.pdf
>         <https://elib.dlr.de/89398/1/2ndGenEmissions.pdf>, equation
>         1-1). However, I did not find values of parameters c0-c5). Could
>         you give any clue on this?
>
>         Thanks in advance!
>
>         Best,
>         Cindy
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